[flexcoders] StyleManager.loadStyleDeclarations causes SecruityError
Hi Flexcoders, Can anyone help me with an apparent sandbox issue? I'm attempting to load an SWF at runtime using the StyleManager. StyleManager.loadStyleDeclarations(url); The URL is on a remote web sever and I am running the code from a local trusted SWF. I understand this should be enough to allow Flash player to download the asset. However, this results in the following error being thrown from somewhere in the ModuleManager. Error: Unable to load style(SWF is not a loadable module): http:// mysever.com/my path to the .swf I also tried using the 'trustedContent' argument to loadStyleDeclarations StyleManager.loadStyleDeclarations(url, true, true); However, this seems to result in a different error: SecurityError: Error #2142: Security sandbox violation: local SWF files cannot use the LoaderContext.securityDomain property. The server does have a crossdomain policy file: ?xml version=1.0? !DOCTYPE cross-domain-policy SYSTEM http://www.macromedia.com/xml/ dtds/cross-domain-policy.dtd cross-domain-policy allow-access-from domain=* / /cross-domain-policy But Flash player doesn't seem to be loading it. According to Safari's Activity monitor. The SWF file does exist. I downloaded in a browser it and loaded it locally through the StyleManager without problems. Can anyone shed some light on this? Many thanks, Lach smime.p7s Description: S/MIME cryptographic signature
[flexcoders] Loading classes at runtime from RSLs, SWCs etc.
Hi All, I was wondering if someone can offer some advice on dynamic loading of classes at runtime. What I would like to achieve is to create a library of view classes (effect classes to be specific) which can by dynamically loaded into a Flex application at run time. I don't want to re-compile the main application when new classes become available. All the classes will conform to an abstract interface. Ideally, when new classes are available, I want to compile them into SWC files and place them in a directory on the server so that next time the Flex application is run, it can detect the available classes and present a list that the user can choose from. I've got the idea you can do something like this with SWC files published from Flash CS3. Can someone point me toward some resources or offer some tips that might help me ask a better question. Cheers, Lach smime.p7s Description: S/MIME cryptographic signature
[flexcoders] Embedded SWFs and Fonts
Hi Flexcoders, I've got a slightly obscure objective concerning Embedded SWFs and Fonts in ActionScript 3 Projects. Basically I want to be able to create several SWFs (probably in Flash) which can be embedded in ActionScript 3 projects and styled. I.e. I want to be able to change the fonts used in the SWF. The tricky part is, I don't want to embed the fonts directly inside the embedded SWFs — I want to embed them in the parent application so they can be shared across the embedded SWFs. The goal is to keep all SWFs as small as possible. Can this be done with SWFs created in Flash 8? What about Flash 9 CS 3? Cheers, Lach smime.p7s Description: S/MIME cryptographic signature
[flexcoders] Re: Scaling a TextArea without reflowing the text
Excellent. Problem solved. Thanks Dan. --- In flexcoders@yahoogroups.com, Daniel Freiman [EMAIL PROTECTED] wrote: textField.antiAliasType = AntiAliasType.NORMAL; - Dan Freiman
[flexcoders] Scaling a TextArea without reflowing the text
Hi Flexcoders,
Does anybody know the secret to scaling a multi-line text container
(e.g. a TextArea) while preserving the flow (line wrapping) of the text?
I want to be able to 'zoom in' on a TextArea while keeping the text
flow the the same as it was.
I would have expected that when I set scaleX and scaleY properties on
the TextArea that the whole thing grows bigger while keeping the text
flow essentially the same, but this isn't the case.
There appears to be some kind of rounding error or the text isn't
scaled in proportion because it jitters all over the place and the
line wrapping changes.
I have tried scaling the TextArea directly, a parent of the TextArea,
and even pulling out the TextArea's internal TextField and scaling
that. All have the same results. I've also tried with embedded fonts.
Does anyone know how to make the text behave itself?
Example code is attached.
Cheers and many thanks to all,
Lach
?xml version=1.0 encoding=utf-8?
mx:Application
xmlns:mx=http://www.adobe.com/2006/mxml;
xmlns:view=com.bremy.print.view.*
layout=absolute
mx:HSlider horizontalCenter=0 y=100
minimum=0.5 maximum=2 liveDragging=true
change=scaleText(event) /
mx:VBox id=box horizontalCenter=0 verticalCenter=0
horizontalAlign=center verticalGap=20
backgroundColor=white
mx:TextArea id=area
paddingLeft=10 paddingRight=10
width=300 height=300
text={text} /
/mx:VBox
mx:Script
![CDATA[
import mx.events.SliderEvent;
protected function scaleText (event:SliderEvent):void {
area.scaleX = event.value;
area.scaleY = event.value;
}
private const text:String = Duis, velit nulla, accumsan magna,
veniam. +
Consequat nibh sed vero erat dolore ea
aliquam duis at exerci +
ullamcorper dolor. Velit ut iusto, enim consequat vulputate
enim +
enim facilisi autem nulla. Amet accumsan lobortis, ut eum,
vulputate, +
vero blandit et dolore consequat veniam quis duis wisi vero.
Ex, +
dignissim delenit commodo, hendrerit molestie et augue odio ex
nisl +
tation odio iriure veniam eum. Luptatum consequat autem.
Consequat +
molestie facilisi qui nulla. In accumsan vero, ut. Et,
vulputate, +
consequat, blandit, aliquip dolore, ipsum veniam dolore duis
delenit +
vero dolore dignissim accumsan.
]]
/mx:Script
/mx:Application
smime.p7s
Description: S/MIME cryptographic signature
Re: [flexcoders] Flex Builder issues with large projects
Hi Tracy, Thanks for those suggestions. Unfortunately, the vast majority of the code base is required for all products, and breaking it up as runtime shared libraries hasn't worked very well. Your second suggestion is very interesting. I suppose you need to be running Flex Builder as an eclipse plug-in to go this route? I've also read in the Flex documentation that using Modules can help to optimise compilation, as recompilation is limited to the effected module. Can anyone comment on real world experience with this approach? Cheers, Lach On 28/08/2007, at 3:00 PM, Tracy Spratt wrote: Can you logically break the project up into several smaller projects? This way, you can close the projects you are not actively working on, which speeds up the compilation significantly. Also some folks use the command line compiler and Ant, and report better results(I use FB exclusively so far). Tracy smime.p7s Description: S/MIME cryptographic signature
[flexcoders] Flex Builder issues with large projects
Hi List, I'm having a lot of trouble with Flex Builder on a large project I'm working on and would really appreciate some advice if anyone has found themselves in a similar situation. The particular project I'm working on is approaching 30,000 lines of code and also includes a fair bit of embedded assets in the form of skins and images etc. I am building several different products from the same class library. The first problem is that compilation time is far too long. Typically 30 seconds or more even after very minor changes to the source code, about 2 minutes for a clean build. It has become very difficult to do testing in particular as the delay for compilation break up workflow too much. I thought I would try to solve this problem by using RSL from Flex Library Projects as mentioned here: http://flexblog.faratasystems.com/?p=117 This does seem to greatly improve the compilation times, but has cased no end of problems with Flex Builder. Flex Builder seemed to become corrupted, would not allow me to add SWC files to projects, and even started to have problems rendering the user interface. I did a complete uninstall and reinstall of Flex Builder, but continued to have problems loading the projects. Flex builder takes a long time to start up, reports stack overflow errors, or simply will not start unless I remove the projects. I also tried using the Flex Builder 3 Beta, but also ran into [different] problems which prevented me from loading and compiling the projects. Obviously, it's becoming pretty frustrating and inhibiting further development. So my question is… Has anybody experienced similar problems with Flex Builder, or know of ways to optimise compilation times on large projects? Any advice is greatly appreciated. Cheers, Lach smime.p7s Description: S/MIME cryptographic signature
[flexcoders] Embedding FLV into Flash 9 SWF
Hi, There was a thread on flexcoders about a year ago talking about using the @Embed syntax to compile FLV video into the SWF. Apparently this wasn't possible back then but there was talk that it might be in a future version. Is there any news on this? Is there anyway to embed an FLV directly into the SWF file? I believe this is possible with Flash since MX or so: http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=tn_14571 How do you do this in Flex? Cheers, Lach smime.p7s Description: S/MIME cryptographic signature
Re: [flexcoders] Masks, Filters, Soft Wipes
In case anyone else is interested, the solution to the bitmap cached mask issue is to make the mask a sibling of the target, rather than a child of the target, in the display hierarchy. Then you can position it as you wish and it filters properly. Cheers, Lach - On 06/05/2007, at 12:23 AM, Manish Jethani wrote: Can anybody help shed some light on an odd problem with filters? I want to create soft edge wipe effects. I've got a pretty good proof of concept that works like so: target.cachePolicy = 'on' mask.filters = [new BlurFilter(20,20)] Sure enough, that creates a nice feather on the mask. Trouble is that the mask now refuses to be rendered in negative space. Even though I can trace the mask co-ordinates and verify they are in negative space, the mask shape renders on screen as if it was set at 0, 0. I've tried a few combinations of this, and I give up. Seems like the mask just won't go into negative space if it has bitmap caching turned on (either cacheAsBitmap=true or at least one filter applied).
[flexcoders] Masks, Filters, Soft Wipes
Hi, Can anybody help shed some light on an odd problem with filters? I want to create soft edge wipe effects. I've got a pretty good proof of concept that works like so: target.cachePolicy = 'on' mask.filters = [new BlurFilter(20,20)] Sure enough, that creates a nice feather on the mask. Trouble is that the mask now refuses to be rendered in negative space. Even though I can trace the mask co-ordinates and verify they are in negative space, the mask shape renders on screen as if it was set at 0, 0. Removing either of the above lines fixes the problem (but then, so soft wipe of course). Anyone understand why this should be? Cheers, Lach
[flexcoders] Flex bug? undefined state
Hi List,
Sorry for the long winded post, but I'm completely baffled by an
exception that my app is throwing involving an allegedly undefined
view state. I have bound the current state of an item renderer
component to an expression that returns one of several possible state
names.
mx:currentState{calcCurrentState(Channel(data).syncing, open)}/
mx:currentState
protected function calcCurrentState (syncing:Boolean,
open:Boolean):String {
return syncing ? 'syncing' : (open ? 'open' : 'closed');
}
Two of the states work without issues, but a third one causes
exceptions. Flex complains that the state is undefined; a claim which
seems to conflict with the evidence:
a. I have stopped the app in the debugger and observed the contents
of the states array (as it should be)
b. Although Flex claims the state is undefined, it then switches to it.
I have tried changing the name of the state, using a different state,
removing the overrides from the state, and several other tests, all
to no avail.
mx:states
!-- These states work fine --
mx:State name=closed
mx:SetProperty target={this} name=height
value=55/
/mx:State
mx:State name=open /
!-- Flex claims this state is undefined --
mx:State name=syncing basedOn=closed
mx:RemoveChild target={syncBtn}/
mx:AddChild relativeTo={syncTools} position=1
mx:ProgressBar/
/mx:AddChild
/mx:State
!-- This test state produces same results --
mx:State name=myState/
/mx:states
A stack trace follows, delineated for clarity. It appears that two
state changes are taking place. I'm not sure why that is or if it is
normal.
Thanks for any insights you can offer.
Cheers,
Lach
ArgumentError: Undefined state 'syncing'.
at mx.core::UIComponent/::getState()
at mx.core::UIComponent/::findCommonBaseState()
at mx.core::UIComponent/::commitCurrentState()
at mx.core::UIComponent/setCurrentState()
at mx.core::UIComponent/set currentState()
at MethodInfo-5897()
at Function/http://adobe.com/AS3/2006/builtin::call()
at mx.binding::Binding/::innerExecute()
at Function/http://adobe.com/AS3/2006/builtin::apply()
at mx.binding::Binding/mx.binding:Binding::wrapFunctionCall()
at mx.binding::Binding/execute()
at mx.binding::Binding/watcherFired()
at mx.binding::Watcher/notifyListeners()
at mx.binding::PropertyWatcher/eventHandler()
at flash.events::EventDispatcher/
flash.events:EventDispatcher::dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/dispatchEvent()
at mx.core::UIComponent/::commitCurrentState()
at mx.core::UIComponent/setCurrentState()
at mx.core::UIComponent/set currentState()
at MethodInfo-5887()
at Function/http://adobe.com/AS3/2006/builtin::call()
at mx.binding::Binding/::innerExecute()
at Function/http://adobe.com/AS3/2006/builtin::apply()
at mx.binding::Binding/mx.binding:Binding::wrapFunctionCall()
at mx.binding::Binding/execute()
at mx.binding::Binding/watcherFired()
at mx.binding::Watcher/notifyListeners()
at mx.binding::PropertyWatcher/eventHandler()
at flash.events::EventDispatcher/
flash.events:EventDispatcher::dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at com.couch.emotive.model::Channel/dispatchEvent()
at com.couch.emotive.model::Channel/set syncing()
at com.couch.emotive.commands::SyncChannelCommand/result()
at mx.rpc::AsyncToken/http://www.adobe.com/2006/flex/mx/
internal::applyResult()
at mx.rpc.events::ResultEvent/http://www.adobe.com/2006/flex/mx/
internal::callTokenResponders()
at mx.rpc::AbstractOperation/http://www.adobe.com/2006/flex/mx/
internal::dispatchRpcEvent()
at mx.rpc::AbstractInvoker/http://www.adobe.com/2006/flex/mx/
internal::resultHandler()
at mx.rpc::Responder/result()
at mx.rpc::AsyncRequest/acknowledge()
at ::NetConnectionMessageResponder/NetConnectionChannel.as
$31:NetConnectionMessageResponder::resultHandler()
at mx.messaging::MessageResponder/result()
Re: [flexcoders] Base Classes, Bindable, and dispatchEvent
Hi Steve, I'm a little confused about how this class is supposed to work. Is it a subclass of ProxyObject? You have a model object which maintains a reference to another (hidden) model object? If you have marked the property as bindable, you shouldn't have to manually dispatch events to inform listeners that it has changed. That's the whole point of bindings. Probably the issue is that your listeners are not actually binding to the model source property of the ModelBase derived objects, so Flex sees no reason to update them when the source changes. What you need to do is throw events to inform listeners that the other properties have changed. But if you are explicitly coping them, I don't see why you should have to do that either. Also, is it a dynamic class? I have a feeling that bindings will only work with statically typed classes. Can you post the code for the ModelBase class so I can understand better what you're trying to do? Cheers, Lach On 07/12/2006, at 4:52 AM, Steve Hindle wrote: Hi All, I have a base class I use for models (ModelBase, original eh?) that contains a 'set' function. set(source:Model) - it simply copies fields from the source model to 'this'. Works great, except I'm not sure how to let everyone know the model changed. The base class currently uses dispatchEvent(new Event(ModelChanged)) to signal the change. Since I import flash.events.*, I'm guessing this throws a flash.events.Event. Derived classes don't throw any events. Application code has: [Bindable (event=ModelChanged)] private var _model:DerivedClass; and getter/setter for model. The setter also uses dispatchEvent(new Event(ModelChanged)). Problem is, the setter in the application code trips the event listener I added... but set() in the base class doesn't cause it to fire.. Anyone have any ideas what the problem might be?
Re: [flexcoders] disable mouse
Hi Diego, I'm not sure if you can do that, but it's probably would be a little counter intuitive for uses as there is no visual indication of why they cannot use the app. That is what the disabled state of components represents, so it is the correct way to do that kind of thing. Cheers, Lach On 08/12/2006, at 11:51 AM, Diego Guebel wrote: Hi there, I wonder if there is any method to disable the mouse to be clicked when I change the cursor to busy avoiding disabled the components I have on the screen. I want to avoid that as I don't want to grey the application each time I change cursors. Thanks, Diego.
Re: [flexcoders] AMF Error using Cisco WebVPN
If it is a sand boxing issue, you might be able to get around it by placing an crossdomain.xml file on your sever and naming the domain from which your external people access the app. Cheers, Lach On 23/12/2006, at 5:47 AM, Rich Tretola wrote: We have an internal application that needs to be accessed by our external people though webVPN client. The application loads by my AMF connection to the local java class files fails with an error of: faultCode: Client.Error.MessageSend faultString:'Send Failed' faultDetail:'Channel.Connect.Failed error NetConnection.Call.Failed: HTTP: Failed' The application works perfectly when accessing through its direct URL but failed when using the webVPN where the URL is different and the app loads though a proxy. Anyone else have any experience with this? Rich
[flexcoders] Item Renderer/Item Editor confusion
Hi All, I wonder if someone might be able to shed some light on an issue I'm having with item renderers. The trouble stems from the whole recycling thing that the list components do. Basically, my custom renderers have two states: one for viewing and one for editing the data object. I double click the renderer to put it into edit mode. The trouble is that if I then scroll the list component, the renderer is re-used to display another data object, but remains in edit mode. I tried using the dataChange event to put the renderer back into view mode, but this event seems to get fired more frequently than one might expect and I couldn't then edit the items at all. Whats the best way to detect when I need to change states? I'm also a bit confused over the whole item editor discussion in the docs. I don't understand why we need the concept of an item editor per se and the whole update cycle that goes with it, since the renderer component can update the data object directly on its own. Any help appreciated. Cheers, Lach
[flexcoders] Indeterminate progress bar
When I set a progress bar to be indeterminate, it doesn't animate in polled mode or even in event mode. Is there a way to get it to animate other than calling setProgress directly? Cheers, Lach
Re: [flexcoders] Re: Newbie help: model bindings work with some but not all
Hi Tim, What kind of control is myTags bound to? Cheers, Lach On 20/12/2006, at 7:50 AM, Tim Garver wrote: Hi All, here is some snippets from my project that is not working. i have included some of the code, let me know if you need all of it. it quite large. The myTags data field is the one in question. This file is opened up as a windowed page from a calling page. the calling page passes in an object and the object is used by remoting to get the data on this page. THanks in advance. Tim
Re: [flexcoders] Checkbox MenuBar
Hi Jeremy, Let me see if I understand you correctly: you want to have a horizontal menu bar where each item will drop down a list of checkbox controls when selected? Cheers, Lach On 20/12/2006, at 10:37 AM, Jeremy Rottman wrote: I'm having trouble thinking of a way to accomplish the next step in my application. Basically what we have right now is a menu bar that is created from a mysql query. That part I have working fine. The next part that I'm working on is a permission based system that say an admin were to login and go to the menu bar admin screen and be able to select which items of the menu a group has the ability to see. Now the easiest way I can think of laying this out for the admin would be to just recreate the same menu with the same queries but with checkboxes next to each menu item(including the top level item that when clicked selects all children). Basically imitating the TreeCheckBox component I have seen but in menu bar form. However I have not been able to find any examples or even any talk about something like this before. The reason I don't want to use the TreeCheckBox is because the tree would be very long and cause a lot of scrolling with this many sub items so really the best bet is to have something horizontal that I already know fits the screen. Does anyone have any ideas of other components or other ways that this task could be accomplished? Any help or opinions would be much appreciated.
Re: [flexcoders] Populating Multiple Levels of Branches
Hi Kyle, Listen on your tree control for the itemOpen event. Retrieve the tree node from the event, pull from it what information you need for your next query. When the query returns, append the results as children of that node. Bindings should update the tree control. Is that what you were looking for? Cheers, Lach On 20/12/2006, at 9:04 AM, Kyle Hayes wrote: I am quite new to Flex and was planning on learning it very soon which ended up being sooner than I thought because of a project that could really use it. So here I am. The application I am designing needs to display a hierarchal list of codes. All the codes are related to each other in that one is abover another. … Inside my database there is a table that raggedly displays this data in 11 columns (the 11 levels) 1 2 3 4 5 6 7 8 9 10 11 AA AAA AA AAB AABA AA AAB AABB AA AAB AABCAABCA AA AAB AABCAABCB etc So I want to query this data in which case I have already built a function in ColdFusion to return the DISTINCT items for a level that I specify Which in my example would produce AA AB for level 1 I am able to return that much to a tree and have it display the folders by adding a column pragmatically to the Query called children. There are 10s of thousands of records in this table so I do not want to grab all this data at once. I want the next level for a specified entity to be pulled from the CFC when I click it. How do I append this information to a folder item? Thanks a bunch! -Kyle
Re: [flexcoders] SequenceCommands ... is there a point to their existence?
I came up against just this problem today and decided that the sequence command wasn't appropriate for reasons similar to what you've outlined below. The sequence is intrinsic in the actual command classes which obviously makes them less reusable. In my app, I wanted the idea of the command sequence to be at another level than the commands themselves. The solution I used was to create my own kind of sequence command, which very simply just creates a list of other commands to be executed in turn. It just keeps track of where it's up to and calls the next command directly when the last one is done. I am not using the event mechanism to call the commands. This also requires that each command post a notification that it has completed by firing a CommandComplete event which the sequence commands listens on the event dispatcher for. Hope that's useful to you. Cheers, Lach On 20/12/2006, at 8:39 AM, thegiffman wrote: Basically these are four different commands that should be executed in sequence. And it makes sense from an architectural standpoint for them to be separate - I can see wanting to query for fine data in other situations than data set creation (like an update). But here's the kicker - sequence commands don't really seem set up to do this. I can't really get at the commands themselves to set the next event with the constructor, since the front controller handles all this. As such, the sequence command can really just do one action - querying the back end for fine grain data will ALWAYS trigger an event to add the data set. To avoid this, I might include a flag in the event whether to stop or go on to the next command. But this raises the question - can't I do this anyway with a call to the event dispatcher? The value of having sequence commands seems to be the ability to move to the next sequence without the sequence being hardcoded. Yet this functionality doesn't really exist - it is hidden by the front controller. Could someone set me straight here?
Re: [flexcoders] Adding a new button to a Tabbar without altering the dataprovider.
Hi Dan, I can think of two possible approaches. You could create a proxy data-provider that places a layer between the control and the real data provider, that manipulates the data for this view (by adding your pseudo item). or… You could create a subclass of the control that adds the functionality you are describing. I think this would be preferable, since, as you said, this is an aspect of the view, not the data. I'll be interested to see what other ideas there are about this one too. Cheers, Lach On 20/12/2006, at 8:42 PM, Dan wrote: Hi, I want to implement a tabBar that with the last tab labeled new so that when ever the user click that new tab, a new tab is added to the dataprovider. However, I don't want to add a new object in that dataprovider for that labeled new tab at the tail, since it will complicated that other operation working on that dataprovider (since that new tab is actually not one of the data) Is there any way to achieve it? Can i manually add a new tab to the tab bar without changing the dataprovider? Thx in advance for any advice. Dan
Re: [flexcoders] Re: Load swc instead of swf
Hi Saba, What's wrong with just loading ordinary XML files? Cheers, Lach On 20/12/2006, at 10:12 PM, ssundke wrote: Ok.. so what do I do for this problem. I need to write some help files for my project and I need my swf to be standalone since it can be used. I didnt want to hardcode the html in one as file or mxml file, so I thought I would make a separate file for it and let it be loaded when it was needed. Since I need my swf to be standalone, I didnt want any dependancy on some other web resource. What are my alternatives? - Saba
Re: [flexcoders] Can I export XML from client to a new html page
Hi Vikas, It's possible to pass data between Flash and JavaScript, so theoretically, it is. My memory might be faulty but I have a vague idea that I've done something like this in the past in a situation where I wanted to include some data from an embedded SWF in a form submission along with other fields from the HTML page. I'll see if I can dig it up and see if it will be useful here. Cheers, Lach On 13/12/2006, at 5:49 AM, Vikas Bhatia wrote: From flex I can open up a new html page. Is it possible to populate that page with the xml already present on the client. The use case is that for every grid I want to provide a csv and xml download without going back to the server to fetch the same data. What I would like to do is open up the new window and with javascript/actionscript populate the new window with the xml data formatted from within the client. Is this possible? Thanks.
Re: [flexcoders] why AMFPHP , i still can not get the point :(
Hi Yioit, I believe AMFPHP was originally created to work with remoting in Flash (not Flex). The XML handling abilities of Flash are not in the same league as Flex, so XML was a huge pain. AMFPHP definitely makes a big difference for Flash Development. Since Flex is so much better with XML, the benefits may not be so obvious depending on the specifics of your project. I agree with you that there can be a lot of overhead in creating client-server interfaces and working out the best way to serialise data for transfer etc. As for your comment about having to write classes in both PHP and ActionScript: I don't see that there is any escaping this. Unless your application is trivially simple, then you will surely want to create domain model objects on the server to encapsulate logic and the database access. Same goes for the Flex side. As for the most development time efficient method for architecting the service interface, I'm still trying to figure that out. There are several options for both XML and AMF in PHP and also in other languages. WebORB for Ruby on Rails is another alternative that can potentially save time once you get over the Rails learning curve and learn how to install everything properly (which is a significant investment). You are correct that AMF serialised data is quicker to transfer and marshal than the equivalent XML, but this probably only becomes an issue when your dealing with quite large result sets. With regard to your generalised database query over HTTP class: I'm all for this type of time saving solution, but I think you need to address a couple of issues to make it more widely useful. Namely, the security concern of having a service that allows clients to effectively design their own SQL queries to be executed on your server, and secondly the fact that this approach seems to bypass the server side domain logic. Cheers, Lach On 18/12/2006, at 6:44 PM, Yiðit Boyar wrote: hi, i've been developing web RIA's using PHPmysql support for data for about 3-4 months. writing diffrent php files for every fetch type was sucking so i've starting developing a new class communicating with my own php file to fetch data. my class is so pre now but you may find some info about it athttp://yboyar.blogspot.com/2006/12/ easyreq-http-service-class-which-makes.html . anyway; my question is sth diffrent. also i read a lot about AMFPHP , i still could not understand where it helps me reduce time to build applications since i write every class in php actionscript. i've downloaded AMFPHP but although i did the database setup , it still gives error. So, please can someone clearly explain me how AMFPHP helps time reduction WHILE developing the application ? (or does it ?) as much as i understood, it help reducing transferred data size in the running time. Am I right in this point ? thanks a lot, by the way; what do you think about the tool i develop; does it seem helpful or useless ?
Re: [flexcoders] Can I export XML from client to a new html page
It appears that in my old Flash based app, I used LocalConnection and a gateway SWF to call JavaScript functions. This info might put you on the right track for doing something similar in Flex: http://www.adobe.com/devnet/flex/articles/analytic_app_05.html Cheers, Lach On 18/12/2006, at 9:55 PM, Lachlan Cotter wrote: Hi Vikas, It's possible to pass data between Flash and JavaScript, so theoretically, it is. My memory might be faulty but I have a vague idea that I've done something like this in the past in a situation where I wanted to include some data from an embedded SWF in a form submission along with other fields from the HTML page. I'll see if I can dig it up and see if it will be useful here. Cheers, Lach
Re: [flexcoders] Creates Duplicacy in Datagrid
Hi Gaurav, That's the standard and intended behaviour in pretty much all applications. If you really want to change it, you need to define your own custom drag handler methods on the DataGrid. Cheers, Lach On 18/12/2006, at 10:44 PM, Gaurav Jain wrote: Hi All, I have a Datagrid in my application and I can change the position of the rows by dragging a particular row and dropping it at required position. But whenever I press Ctrl key and drag and drop the row (i.e. Ctr l+ Drag-Drop) it creates a duplicate row at that position. Can any one help me out on this. Thanks in advance. Gaurav
Re: [flexcoders] Re: How do I reset itemRenderer inside DataGrid when dataProvider is updated?
Sorry if this is out of left field (and wrong), as I haven't read through the rest of the thread, but is it the case that dataChange is fired during scrolling because the item renderers are reused by the list control with different items in the dataProvider? Cheers, Lach On 19/12/2006, at 11:08 AM, Tom Lee wrote: as is so often the case, we have no answer to the question at hand (why does a dataChange event fire when the datagrid is scrolled?)
Re: [flexcoders] Equality and strict equality
Thanks Greg, Okay so the distinction is to do with types rather than with identity. In that case, how does one compare two objects by value? For example if, I have two separate instances of a class which happen to have the same value, as in var foo:MyObject = new MyObject; var bar:MyObject = new MyObject; How do I test their equality by value (not by reference)? Is there an operator for this, or do you have to write your own comparison methods? If the former, does ActionScript distinguish between shallow and deep comparisons? Cheers, Lach On 17/12/2006, at 5:04 PM, greg h wrote: http://livedocs.macromedia.com/flex/2/langref/ operators.html#strict_equality After reviewing the link above, please post back with any further questions.
Re: [flexcoders] Equality and strict equality
Thanks Ralf,
Is there a standard interface that one should implement to do this?
For instance,
class MyObject implements IComparable
{
public function compareWith (b:Object):Number;
}
something of that nature? Nothing obvious came up in the documentation.
Cheers,
Lach
On 17/12/2006, at 9:15 PM, Ralf Bokelberg wrote:
I'm afraid, you have to write your own comparison methods.
Cheers,
Ralf.
Re: [flexcoders] Making objects vs extending objects and their properties
Hi David,
As I was recently reminded, you can only loop over properties this
was when they are dynamically created, as in your first example. To
enumerate the declared properties of your custom class, I believe you
need to use the describeType() or getClassInfo() methods. See
'performing object introspection' in the docs for details on this.
Cheers,
Lach
On 18/12/2006, at 9:20 AM, David Harris wrote:
Hi Guys,
Anyone know how I loop over properties of a Class that extends
Obejct
Here is an example of what I mean...
if I go:
var oThisObject:Object = {one:one,two:two,three:Three};
I can do this:
for(var s:String in oThisObject){
trace(s);
}
and will trace out one,two,three
If I create a class
package somePackage
{
[Bindable]
public class MyCustomClass extends Object
{
public var one:String = one;
public var two:String = two;
public var three:String = three;
}
}
and then have
var oThisObject:MyCustomClass = new MyCustomClass();
I can't do this:
for(var s:String in oThisObject){
trace(s);
}
and get any results...
...also the toString breaks...
I want to be able to do the second option as the properties on the
Class will be changed and added to, i would lke to refer to them
dynamically...
Cheers,
David
Re: [flexcoders] Image Loading dynamically
Hi Kumar,
When you say 'loaded already', do you mean that you want the images
to be pre-compiled into the SWF? There may be a better way to do it,
but this is one method that seems to work.
?xml version=1.0 encoding=utf-8?
mx:Application xmlns:mx=http://www.adobe.com/2006/mxml;
layout=absolute
mx:Script
![CDATA[
import mx.collections.ArrayCollection;
[Embed(source='image1.jpg')]
private var image1:Class;
[Embed(source='image2.jpg')]
private var image2:Class;
[Bindable]
private var myImages:ArrayCollection =
new ArrayCollection([image1, image2]);
]]
/mx:Script
mx:Image source={myImages.getItemAt(0)}/
/mx:Application
Cheers,
Lach
On 16/12/2006, at 7:37 PM, KP wrote:
Hi All,
Is there a way to load complete set of images in any array or any
thing like that so that later it can be used for any other purpose
example slide show.Currently I am storing source of the image in an
xml file and from there I am changing or rather assigning source of
image control to create an slide show but what I want is to create
a slide show in which all the images are loaded already in any
variable or collection and then I can manipulate that collection to
switch the source of image.
Kumar
Re: [flexcoders] want to load multiple XML files to populate various controls
Are you calling send() on each of the services? Are errors reported, or does it just silently fail? On 16/12/2006, at 9:33 AM, danj520 wrote: can you have multiple instances of httpService? Here is my code: mx:HTTPService id=adapSrv url=data/adapters.xml/ mx:HTTPService id=attenSrv url=data/attenuators.xml/ mx:HTTPService id=btSrv url=data/biastees.xml/ mx:HTTPService id=combSrv url=data/combiners.xml/ mx:HTTPService id=termSrv url=data/terminations.xml/ mx:HTTPService id=popSrv url=data/popular.xml/ When run, app finds the popSrv path and loads the data, but won't find any other paths even though the files exist in their respective paths. Any help would be appreciated.
Re: [flexcoders] Image Loading dynamically
Probably you need to use a bunch of loader objects to pre-load the images. You might approach it something like this: 1. start with your collection of filenames 2. enumerate over them, creating a loader object for each 3. add an event listener to each loader so you know when it is done 4. when you get notification that an image is loaded, increment some tally 5. when the tally equals the length of your original collection, you are good to go Someone else may be able to elucidate the finer points of using loaders and how to then use the loaded content in other controls. Cheers, Lach On 16/12/2006, at 11:30 PM, KP wrote: Thanks Lach for your reply. If you remember once you have replied for slideshow component creating it quickly. Well in that you were putting the urls of images in the array collection.and then you were changing the source of images with the help of timer control. I want to dynamically load all the images directly in the array collection and then directly use get item method to show in the slide show. Can this be done. Kumar
Re: [flexcoders] Repeater Control
Hi Kumar,
I fear one of us does not grasp the concept of the repeater class.
The way I understand it, it's for repeating the instantiating of a
child object, not for repeating the firing of events per se. I think
the solution to your question here is not unlike the slideshow example.
?xml version=1.0 encoding=utf-8?
mx:Application xmlns:mx=http://www.adobe.com/2006/mxml;
layout=absolute
creationComplete=init()
mx:Script
![CDATA[
[Bindable]
public var firstLabel:String;
[Bindable]
public var secondLabel:String;
private var timer:Timer;
[Bindable]
private var count:Number = 0;
private function init ():void
{
timer = new Timer(5000);
timer.addEventListener(TimerEvent.TIMER,
doChange);
timer.start();
doChange(null);
}
private function doChange (e:TimerEvent):void
{
var length:Number =
XML(myData).children().length();
firstLabel = XML(myData).child('student')[count
% length].name;
secondLabel =
XML(myData).child('student')[(count+1) % length].name;
count += 2;
}
]]
/mx:Script
mx:XML id=myData
root
student
nameABC/name
/student
student
namePQR/name
/student
student
name123/name
/student
student
nameXYZ/name
/student
student
nameRST/name
/student
/root
/mx:XML
mx:VBox
mx:Label text=VALUE: {firstLabel}/
mx:Label text=VALUE: {secondLabel}/
mx:Label text=COUNT: {count}/
/mx:VBox
/mx:Application
So I don't really see how the repeater comes into it. Did I
understand your question properly?
Cheers,
Lach
On 16/12/2006, at 10:57 PM, KP wrote:
Now I want to display contents of this xmllist in a label control
with a repeater control which repeats after few sec and displays 2
items at a time which means in first 5 sec I want to display ABC
and PQR for the next 5 sec 123 and XYZ and soon.and this should
repeat I know it will need a repeater control for this but I am not
able to figure out best possible way of displaying contents.can
some one help me out of this.
Thanks
Kumar
Re: [flexcoders] Re: Merge two XML documents
Hi Collin,
Is your data always a flat list of string values? or does it have
'depth'? Because if so, you might need to change how you examine your
data.
Cheers,
Lach
On 17/12/2006, at 6:13 AM, Collin Peters wrote:
By merge I mean that this XML
root
node id=1value1/node
node id=2value2/node
/root
and this XML:
root
node id=2value2/node
node id=3value3/node
/root
would become this XML:
root
node id=1value1/node
node id=2value2/node
node id=3value3/node
/root
I am current doing this which seems to work well. I don't think
there will be anything more efficient
for each ( var x:XML in _xml.key ) {
if(!_mainXML.contains(x))
_mainXML.appendChild(x);
}
[flexcoders] Equality and strict equality
Can anybody point me to a comprehensive reference that explains how equality and strict equality works in ActionScript 3. Presumably strict equality means two variables hold the exact same instance. How is non-strict equality determined with non-primitive objects, collections and the like? Cheers, Lach
Re: [flexcoders] Error In Service Browser
The error means that the object you are assuming to be of type ErrorMessage was in fact just a plain object. You cannot cast an Object to an ErroMessage because it is missing all the methods and properties that an ErrorMessage is supposed to have. Cheers, Lach On 15/12/2006, at 3:22 AM, runnerr wrote: Hi All, Im getting an error in the service browser: TypeError: Error #1034: Type Coercion failed: cannot convert [EMAIL PROTECTED] to mx.messaging.messages.ErrorMessage. I have tried to look deeper into the code but I cannot figure it out.
[flexcoders] Flex Store Example + collection view optimisation
The collection view classes in Flex such as List, TileList, DataGrid etc. have an optimisation so that the component only instantiates enough item renderers to display the items currently on screen. This is presumably a necessary optimisation to keep from consuming massive resources when rendering large collections. The Flex 2 Store example implements a custom collection view that does animation of renderers and state changes etc. and does live filtering of the collection as the user drags a slider. It's considerably cooler than the standard classes. I want to do something similar in my app. The question As far as I can tell, the Flex Store isn't optimised for renderer minimisation the way the standard collection classes are. I would like to know at what point this approach is likely to run into performance issues with collections approaching say two – three hundred items. Does anyone have any experience with this kind of thing? Cheers, Lach
[flexcoders] Adding functionality to existing classes
Is there any way in ActionScript 3 that you can add methods to an existing class short of declaring a new subclass? Something akin to Ruby's open classes or Objective-C categories, or the _prototype property in ActionScript 2. Anything like that? In particular, I want to add some methods to Array and ArrayCollection to do enumerations, searches and the like. Cheers, Lach
Re: [flexcoders] Re: Adding functionality to existing classes
Hi Ben, That's what I'm doing currently, but it's not ideal because I have to instantiate my class each time I want to use the methods which detracts somewhat from the convenience factor. Perhaps something cleaver can be done with proxies? Cheers, Lach On 14/12/2006, at 11:46 PM, ben.clinkinbeard wrote: You could write a completely separate utility class that uses Arrays and ArrayCollections thru composition. HTH, Ben --- In flexcoders@yahoogroups.com, Lachlan Cotter [EMAIL PROTECTED] wrote: Is there any way in ActionScript 3 that you can add methods to an existing class short of declaring a new subclass? Something akin to Ruby's open classes or Objective-C categories, or the _prototype property in ActionScript 2. Anything like that? In particular, I want to add some methods to Array and ArrayCollection to do enumerations, searches and the like. Cheers, Lach
Re: [flexcoders] Scrolling without a scrollbar
If you don't have a track and a thumb, I wouldn't really call it scrolling. Perhaps what you're really after might more accurately be called 'paging'. If you think of it in those terms, does the problem become easier to grasp? Cheers, Lach On 06/12/2006, at 8:18 AM, graysonpierce wrote: We have a requirement for a scrollable container that displays right and left arrows (when necessary) but not the track and the thumb. To be more exact something similar to when you open up a bunch of tabs in Firefox and at the point that it can't make the tabs any smaller it displays the right and left icons. Anyone have anything that might be a head-start? Don't really want to get into measuring individual components (mostly buttons), etc. to write it myself. TIA.
Re: [flexcoders] Dispatched Events from within a Subclass
Hi David, One way to do what you want is as follows: 1. Your form subclass should add an event listener to its delete button in some initialise method that is called on creationComplete. 2. The handler for that button press event should dispatch ANOTHER event. This event is of a custom type that you define and describes the meaning of what occurred. For instance DeleteScheduleRequestEvent. This event should encapsulate enough data for your controller (which may be the parent document), to know the appropriate response for the event. This data will no doubt include the schedule object which is to be deleted. 3. Your parent document should add an event listener to the form instance to catch these deletion request events. It can then respond appropriately. The controller doesn't need to know which button was involved, only the meaning of what the user is trying to do by pressing the button. This is the reason for your custom event type. If your forms are also nested inside a repeater it should also work to add the event listener to the repeater to catch events that occur on its children. Cheers, Lach On 06/12/2006, at 2:56 PM, pedalspeed1 wrote: Two Parts: I have a sub-classed form that has multiple components. The sub-classed form is a scheduling widget and the user can create/update/delete multiple schedules. The form has a delete button. When the user clicks the delete button, I need the parent document to listen for this specific button's press, and then to remove the particular subclass. My confusion is: How do I get a parent document, to listen to a specific instance, within a subclass, within a repeater? Best. D.Buhler
Re: [flexcoders] datagrid itemrenderer
Hi, I'm not sure I fully understood your issue. Is it something to do with transparency or background colour on your item renderers? Why don't you post some example code so we can get a better idea of what is not working. Cheers, Lach On 06/12/2006, at 5:24 PM, rthi99 wrote: Hi all, I am using itemrenderer on headerclick of a datagrid trying to chane colours based on values. There seems to be a problem in the cells that i am not colouring.They are colorless and it is not the same color as the datagrid as such.. The datragrid has alternating colors for rows.How can i preserve the properties of the datagrid column Hope i am clear thanks
Re: [flexcoders] How to create a nested non-visual component
Hi Harry,
This is so you can instantiate and populate your class in MXML?
I don't think you have to do anything special. Just define public
properties or accessor methods on your class. You can then
instantiate your class in MXML, setting the value of properties with
child elements. For instance, if your class looks like this:
public class MyClass
{
public var name:String;
public var children:Array;
}
You can then say:
MyClass
nameA string/name
children
mx:StringSome other objects here/mx:String?
mx:StringOr whatever else you want to put here/mx:String?
/children
/MyClass
Does that answer your question?
Cheers,
Lach
On 09/12/2006, at 10:33 AM, Du, Xiaochen ((Harry)) wrote:
Hello all,
I want to create a non-visual component that can have another non-
visual component as child.
For example:
MyComponentA
MyComponentB/
/MyComponentA
How to do that?
I know I should implement the AS class of MyComponentA from
IMXMLObject like the following. But I don't know how to make it
enable to accept another non-visual component as child.
public class MyComponentA implements IMXMLObject
{
public function initialized(document:Object, id:String):void
{
trace(id);
trace(document);
}
}
You help is highly appreciated.
Regards,
Harry
Re: [flexcoders] Business Objects and Value Objects/Cairngorm. Distinction?
Hi, Although Alex may already have answered your question, I thought a more general explanation might also be helpful. A business object represents an entity in the domain (the real world system of which the application is a software representation). Business objects should encapsulate logic such as relationships and validations which describe the business rules. They should be reusable across various applications as they know nothing about user gestures or application structure. Value Objects, are just bundles of properties and information that may or may not correlate with actual business entities. They are more concerned with moving information around in convenient chunks and providing 'views' of the data than actually representing business logic. As such, they are more specific to the particular needs and processes of a given application. In other frameworks they are (perhaps more aptly) called data transfer objects. Personally I would say that it is not at all fair to say that business objects are just collections of value objects; but I don't blame you for getting that impression, because that's how they tend to be talked about in Cairngorm. Cheers, Lach On 10/12/2006, at 5:53 AM, lostinrecursion wrote: I have one question for someone who may know. Could someone tell me the difference between a Business Object (such as the one Alex uses to encapsulate model properties) and a Value Object (which I am used to constructing). Is it fair to say a business object is just a faux collection of various Value Object (and non VO) properties in one convenient location?
Re: [flexcoders] change state and issue command
You shouldn't need a function to populate your view. Use bindings to tie it to the data model. It might also be worth looking over the docs for the DataGrid and TabNavigator to see what events they fire and when. Cheers, Lach On 10/12/2006, at 5:14 AM, bghoward3 wrote: here is my situation i have an app with 2 states, the first state is a dashboard with a grid on it when user clicks item in grifd it goes to state 2 where a tabnavigator exists and the compoents display the selected items information this works fine the first time through since my function to populate is called on the creationcomplete of the embedded component i am having a problem in getting it to redraw or send it the function to redraw since since the component lies in a differnt sdtate. so is there a way to call a function everytime in an embeded component whenever the new state loads so that the info populates correctly? or do i need to create some sort of listener thanks
Re: [flexcoders] To Remote Call or Not To Remote Call in Cairngorm
Your plan sounds like a good one to me. For extra efficiency, you might also want to keep track of what calls you have pending. For instance, you may have issued a call to get the data but it has not yet arrived. Just depends on how nice you want to be to your server. Cheers, Lach On 07/12/2006, at 4:06 AM, Brian Holmes wrote: For fairly static data that is bound to many different views, I only want to go to the server when the data's not there. … My first inclination on handling this is to look at the ModelLocator to see if the data is null or not and act accordingly and that works great. So I was wondering where and how other people are managing this kind of logic. Thanks, Brian.
Re: [flexcoders] Use an Image as an icon
Hi Even,
I may be wrong, but I'm pretty sure the case is this:
Meta-data and embedded assets are interpreted at compile time.
Program variables are assigned at runtime.
It doesn't really make sense therefore to assign a compile time
constant the value of a runtime variable. I.e. var image won't ==
'image.jpg' until your program is running. I'm not sure I really see
the point of what you're trying to accomplish here.
If you want to change the button's icon while the program is running,
you might have to say something like:
[Embed('about.jpg')]
public var img:Class;
public function changeIcon ():void
{
btn.setStyle('icon', img);
}
Cheers,
Lach
On 07/12/2006, at 8:31 AM, ejb4424 wrote:
Hello. Can anybody tell me either how to use an image as an icon, or
convert an image to a class for use as an icon (in components, the
icon is of type Class)? Or better yet is it possible for
me to dynamically embed an image via a variable?
Sure the usual embed assertion works:
[Embed('image.jpg')]
[Bindable] var img:Class;
...
mx:Button label=button icon={img} /
But what I want to do is embed the image via a variable such as:
var image:String = image.jpg;
[Embed(image)]
var img:Class;
What I'm trying to do is a bit more complex, but help with this simple
example should get me going. Any help would be appreciated. Thanks.
Evan
Re: [flexcoders] Shuffle items in Repeater
Hi Joe, I think there might be a way to do it, but it's not pretty. Probably better off using a list or something similar instead of a repeater, because the repeater isn't much help after it has actually instantiated it's contents. The list is a little more work because you have to go and define a separate item renderer class and set up some event handling to manipulate the data provider, but I believe this would be the correct way to do what it is that you are asking. Cheers, Lach On 12/12/2006, at 1:10 PM, Joe wrote: I have a repeater that verticaly displays about 12 buttons. Is it possible to change the index of the button that is selected. If I selected a button in the middle of the repeater can it would move to the top. Or if it can't move, maybe change the label of the button on the top to read what I just selected. Should this not be in a repeater? Help !!!
Re: [flexcoders] Shuffle items in Repeater
Ah, excellent. I was trying repeater.currentIndex, but this throws an exception when used any time other than instantiating time. On 13/12/2006, at 3:56 AM, Ralf Bokelberg wrote: bringToTop( event.target.data )
Re: [flexcoders] extending classes question (AS) (.HTTPService)
Hi Yigit,
Some of the Flex framework classes are written in ActionScript and
can be viewed in the SDK, others are part of the actual Flash player
platform and are not accessible this way. I suspect the HTTPService
class belongs in the latter classification.
You can still override methods of the class however. Define your send
method like this:
override public function send(parameters:Object=null):AsyncToken
{
// Your custom code here.
// …
return super.send(parameters);
}
The last line invokes the default implementation passing the
parameters and returning the result as the result of your custom
override.
I'll be interested to learn of developments to your custom service
class.
Cheers,
Lach
On 11/12/2006, at 8:07 AM, Yiðit Boyar wrote:
i'm developing a new class based on mx.rpc.http.mxml.HTTPService .
it will have some cool features which will be integrated with
phpmysql.. anyway, when i do sth worth using, i will send it
here.. but now i have a problem;
i need to add some additional code to the default send function but
i can not find it's source code ? (not included in flex sdk ?? )
how can i find it or is there a way to do what i want ::
when send function is called, one of my functions will run first
(it will do some edit on the request data) then call the default
send function..
i see, by creating a new function it is so easy (e.g. send2) but i
want my function to be called when the default send is called. (so
make it easy to use), in other words; i dont want to force the user
call another function to send the request except send...
thanks for your helps...
Re: [flexcoders] HDividedBox
Perhaps there is another way to clip or mask the content without relying on layering it with other components. Cheers, Lach On 10/12/2006, at 5:42 PM, jroblang wrote: Is there any way to permanently change the child order in an HDividedBox so that the child on the right side of the DividedBox is behind the child in the left side. I've used the swapChildAt method which works fine until you move the Divider. Upon release of the divider, the child order changes and the left side flips over to the right side. The content in the right side of the Divided Box can sometimes overflow and I need it to be behind the left side content. Thanks for any suggestions.
Re: [flexcoders] Re: Cairngorm's Anaemic Domain Model
Hi Peter, Thanks for this information, it has certainly helped to clarify some things in my mind. With Cairngorm Enterprise one of goals is to promote an application model on the client (RIA) and a domain model on server. We see the application model being a good OO model that reflects the UI and tells us about the entities and their relationships that we are surfacing. It will also encapsulate all the business rules that apply to the UI. I see this being different to the domain model and the business rules that reside on the server. The thing that is most interesting to me here is the talk of relationships because this is what seems to be lacking somewhat in the current Cairngorm paradigm. Not to imply that it can't be done, just that it doesn't seem to be part of the standard practice. This sort of shifts the concept we have at the moment, whereby you call a command, which may invoke a service via a delegate. In essence we are going to move the delegates behind the model and have the command call an operation on the model. This sounds promising. Where does this put the service locator? In essence it would be nice to see VOs / DTOs being used for transporting data rather than making their way in to the view via the ModelLocator. Again, glad to hear this is an issue for others as well. In simple cases, the VO is adequate because it sufficiently represents both the domain object and the view you want to take of it. When the relationships become more complex however, inconsistencies begin to arise. For example, when you have many-to-many relationships and such and you want to be able to traverse the object graph in bindings or whatever, you need to construct a more interconnected object graph rather than a collection of records as it were. Then you have the problem of how you get from A to B. Is there a best practice you are advocating for mapping and building object graphs out of data in DTOs? or is it left up to the specific requirements of the application?
Re: [flexcoders] upload file progressbar
What's happening on the server side? Are you sending files to a real service? or just a dummy URL? Do you get the same results with other files? Cheers, Lach On 11/12/2006, at 9:54 AM, Philippe wrote: Hi, I use a progressbar to watch a FileReference upload. Everything is ok but when I upload a 2000k file for example at 20K/sec upload speed, the progressbar completes in 2 sec and then the upload continues in the background. Thanks for help Philippe
Re: [flexcoders] Calendar component
Hi, Flex can't access your database directly; you will need some intervening service code on the server written in something like PHP, Java, Ruby, ASP etc. Your service code needs to query the database and output an XML document representing the result. For example: calendar event nameChristmas/name date2006-12-25/date /event event nameNew Year's Day/name date2007-01-01/date /event /calendar Flex can read in the XML with the HTTPService object. You can use the result event on the HTTPService to do what you want with the data, like binding it to your view. I'm not sure what you have in mind as far as visualising the information. Hope that is of help. Cheers, Lach On 10/12/2006, at 10:27 PM, ahmedemara1984 wrote: Hi everybody I'm very new in flex and asking you to help me I have some events recorded in database I want to display this events in date chooser or if a calendar component is available via HTTPService I want the simplest way to accomplish this task Please help
Re: [flexcoders] problem with a for each loop
What happens without the casting? Casting means 'treat this variable
as'. The properties of A and B are not on a plain Object. That might
be why you can't enumerate them.
Cheers,
Lach
On 12/12/2006, at 7:44 AM, leo4beer wrote:
Hi, I got a problem with a for each loop.
I have a class (B), B has a long inheritance chain where the oldest
ancestor is class A.
Class A does not declare an extension of any other class therefore I
take it that it extends the Object class:
All classes that don't declare an explicit base class extend the
built-in Object class.
http://livedocs.macromedia.com/flex/2/langref/Object.html
Somewhere in my code I'm trying to use a for each loop in order to
explore the members of B.
[code]
var obj = Object(instanceOfB);
for each(var prop:Object in obj){
//do some thing (my code never gets here)
}
[/code]
The problem is that although B (and instanceOfB ) has a number of
members the for each loop ignores them all and never goes in side
the loop.
(I used the casting in order to demonstrate that I'm actually using an
inheritor of the class Object)
What am I doing wrong here?
Re: [flexcoders] Focus Rectangle Issue with Effects
I've also had similar issues with the focus rectangle. One that springs to mind is that a focus rectangle on a scroll thumb will sometimes stay put even when the thumb is dragged somewhere else in the scroll bar. Also this morning, a colleague is having an issue with a focus rect that hangs around even when the text field it is focusing is removed from view (during a state change). On 11/12/2006, at 2:53 PM, jmcwilliams2003 wrote: If I have two movieclips on the stage A and B. I select MC A and change the rotation value using a scroller. If I then select MC B, the focus rectangle around MC B has the same rotation value as MC A, except the MC itself is not rotated at all. This is very odd behavior and looks weird on the screen. Everything actually works, but the MC B focus rectangle is rotated and in the wrong place. Its as if I select an object with rotation, the focus rectangle is correct. But, if I then immediately select any object without rotation, the blue box rectangle still has the rotation (not the mc itself). Its almost as if the focus rotation is not being reset properly? This even happens when I select a combo or text box. Pretty much anything that can have focus. Has anyone else seen this behavior? Is there a way to work around it? Thanks, Jason
Re: [flexcoders] Design Pattern/Best Practices for generic record 'list' and 'detail' view Component
Hi Steve,
Is your problem to do with your rules about which view to display? If
it's getting a bit complicated or 'crufty', then you probably need
another level of abstraction. Encapsulate your rules about which view
should be displayed inside a getter called currentView. Bind your
view stack to this.
Now you need to work out how that variable gets updated when
appropriate. One way is to make this a bindable property with a
custom event type. Now dispatch that event type when the length of
dataProvider changes. Obviously, your getter method for currentView
has to contain the logic you described for deciding which view to use.
Is that what you were looking for?
Cheers,
Lach
On 06/12/2006, at 5:27 AM, Steve Hindle wrote:
Hi All,
I'm trying to create a component to use as an example or 'template'
of how to achieve a record list and detail view in flex. I'm starting
with a simple 'contact' record (model) that has name, address, phone,
email, etc. The list of records is held in _dataProvider, and the
specific record to be displayed in the detail view is held in _model.
My goal is to have a nice clean skeleton of how to handle this sort of
display.
My component is a viewstack with 2 views:
View 0: a datagrid displaying summary info of a list of records
(title, first, last). Double click on an entry should
open it in the
'detail' view. dataProvider is bound to _dataProvider, an
arrayCollection.
View 1: a custom component that displays all my model fields.
It has a 'model' property that is used to set the
record to be displayed.
model is a single static instance of my record type, and
all fields in the
view are bound to it ( eg text='{_model.last_name}' )
The logic for the component is pretty simple:
1. Initial view is determined by _dataProvider.length
2. if _dataProvider.length = 1, default to 'detail' view of that
record
3. if _dataProvider.length 2, default to 'list' view
4. if _dataProvider.length = 0, add a new empty record and
default to 'detail'
view to allow data entry.
This mostly works - however, I run into 'odd' problems with
dataBinding and Initialization, etc. As my script gets cruftier with
all sorts of special case logic, and
manually poking stuff to get dataBindings updated, I wonder if perhaps
others have a better Design Pattern or template for this ??
I'd appreciate any feedback...
Re: [flexcoders] socket question
Hi David,
I tried doing something similar to this a while back but without
success. Others have also noted that there is no way to do thread-
blocking in Flex. The problem is that your onData method won't even
get called until next time through the Flex event loop; and that's
not going to happen until after getServerData has returned. So
unfortunately(?) it doesn't work to hang around in a loop until the
service call returns. I think you might be disappointed with this one.
Cheers,
Lach
On 07/12/2006, at 11:00 AM, David Buitenveld wrote:
Hi all -
I am creating a server interface, one of whose implementations
involves talking over a socket connection. I have a need for
synchronous behavior - I call an API method, say
getServerData(aParam), and I get back the result that I want. Not sure
what a good way to do this with sockets would be since the receive
data event makes them asynchronous in nature - can anyone point me
to a good tutorial, or provide a hint?
Consider a made up example :
class SocketServer implements Server
private var _lastResult:String;
// client calls this method and expects a result passed back
public function getServerData(aParam:String): String {
_socket.addEventListener(ProgressEvent.SOCKET_DATA, onData);
connectToSocket(someHost, somePort);
_lastResult null;
issueCommandViaSocket(aParam);
// sit around until we get data
while (_lastResult == null) ;
return _lastResult;
}
private function onData(e:ProgressEvent):void {
_lastResult= socket.readUTFBytes(socket.bytesAvailable);
}
this works conceptually, except that the wait around part hangs the
app.. if I remove that, then I can get the return value and log it in
the onData method.. so, am I even on the right track here? Is there
some way to have actionscript pause or wait until the desired event
gets fired?
thanks for any thoughts -
david
Re: [flexcoders] ListBase.as getting called after Drop to Datagrid--Preventing the Drop???
Hi Wayne,
By any chance did you forget to register your event handler with the
DataGrid? Just a thought.
Cheers,
Lach
On 30/11/2006, at 1:07 AM, wayneposner wrote:
I'm trying to drag-and-drop from a tree to a datagrid. I've followed
the examples to try to achieve this, but whenever I drag over the
datagrid, it refuses to accept the drop. The datagrid acts like the
dropEnabled flag is set to false. I've traced the code and despite
the fact that I have a custom dragEnter handler, it still executes the
handler found in ListBase.as which cancels out my handler.
Does anyone know what would cause this? Thanks!
My Handler is as follows:
private function onDragEnter( event:DragEvent ) : void
{
DragManager.acceptDragDrop(UIComponent(event.currentTarget));
}
Re: [flexcoders] drag n drop manager
Hi Rajesh, When you say that the object is moved or disappears when you drop it on the application, is that because you haven't set up event handlers to receive the dropped data? There are at least two methods you could use to remove the drag operation. 1. Do a test in the method that initiates the drag to see if the target is 'eligible' to be dragged. 2. Remove the event handler from the object when it is dropped on the canvas. Cheers, Lach On 05/12/2006, at 12:34 AM, raju_bb wrote: Hi people, I am using flex 2..i m creating an application using Drag n Drop Manager.I have a main Application which has a small library kind of module similar to Flash Library.This library will contain all the images in it..Now what i want is to drag images from that library and place it on the stage or my canvas of my application.This part is working well but once i drop it on the main application(canvas) the object from the library gets moved/disappear.After i have dropped the target application is there any way to remove the drag operation on that dropped object. How to go for this..Can anyone help me out with this.. Regards, Rajesh Bhadra
Re: [flexcoders] Re: Cairngorms Anaemic Domain Model
My question isn't about the model locator. It's about logic, or lack thereof encapsulated within the domain objects. On 05/12/2006, at 9:59 PM, Tim Hoff wrote: It doesn't matter if it's a collection of dumb value objects, a component, a state variable, or just a common effect. If an object is used more than a couple of times in the app, put it in the ModelLocator. Remember, everything is an object; instantiated and destroyed like the rest of them (GC?:)). The key is; does the object need to be reusable? If so, make it central. -TH p.s. right on Tom.
Re: [flexcoders] Returning values from objects on another canvas
Hi, There are a couple of different issues here. First, why do you need to get a reference to the other view? If it is in order to access or manipulate the data therein, the better approach is to bind both views into some dataProvider and manipulate the data through that. Second, the reason you can't address the sub-components at compile time is that they are not part of the canvas class (they are children of your instance). Notwithstanding the above paragraph, if you still need to access them this way, you might want to define your own subclass component with these child properties, so Flex Builder can find them at compile time. Finally, just a guess but perhaps dgselectedOptions is null at runtime because at the time your function is executing, that component has not yet been initialised. Check the creationPolicy of the tab navigator. Cheers, Lach On 05/12/2006, at 5:19 PM, michrx7 wrote: How does one go about referencing objects on another canvas? For example I have a tab navigator with 4 tabs: Register Attendees Membership Payment Options Inside the attendees tab I have a canvas: csAttendee with a datagrid: dgselectedOptions When the user submits the pay button on the payment options tab I call a function to validate their input and try and reference the columns array for the datagrid dgselectedOptions. Using csAttendee.dgselectedOptions gives me an error when I try to compile of Access of possibly undefined property dgselectedOptions through a reference with static type mx.containers:Canvas. If I try Attendees.csAttendee.dgselectedOptions gives me Access of possibly undefined property csAttendee through a reference with static type mx.containers:Canvas. If I try just dgselectedOptions it compiles, but when I click my payment button it gives: Cannot access a property or method of a null object reference. Even though I can click on the Attendees tab and the datagrid is there and populated.
Re: [flexcoders] Cairngorm’s Anaemic Domain M odel
On 05/12/2006, at 8:47 PM, Tom Chiverton wrote: First, I have never seen examples or discussion of Cairngorm that deals with this issue. In most cases the 'model' isn't much more than a collection of dumb value objects without complex relationships. I'm not sure you'd want your model to be very more complex. Really? Maybe it's my upbringing but I seem to want this a lot. In particular, when you want to model relationships and connections between objects other than a simple containment type relationship. Or when you want to describe objects with behaviour rather than only data. Second, and more importantly, pretty much all the logic of Cairngorm apps seems to reside in the Command and Delegate classes with not much to speak about in the actual model. It seems to be the Commands that end up manipulating the application data directly, and I'm a little uncomfortable with this. I think it's a good idea to stick all the logic in once obvious place, and then have that change the model, which uses data binding to make things change in the view. Seems to me that the one obvious place for logic related to the business domain is in the model. Not that commands aren't a good idea; and I have no problem with using binding to update the view. That's not really the issue. The issue is encapsulation of business logic and guidelines for architecting the distributed domain model. Cheers, Lach
Re: [flexcoders] Re: Cairngorm's Anaemic Domain Model
Thanks Alex, One thing I'm looking for is validation that there is a need in some applications to construct an object graph of sorts to describe the model beyond an array of records to be CRUDed. Surely I'm not alone here? If that's the case, is there a best practice for going from value objects delivered from a service, to first class, intelligent model citizens in the domain? One thing I've found confusing about the Cairngorm approach is that models and value objects seem to be synonymous. You thoughts? Cheers, Lach On 05/12/2006, at 11:13 PM, Alex Uhlmann wrote: there many ways to use Cairngorm. I agree with you completly, it's of vital importance to refactor the right functionality from both, views and commands into model objects that mean something to your use case. Then, this functionality can also be easier unit tested. … However how your model is going to look like depends on your specific needs. Cairngorm doesn't tell you how to design your custom model or your custom view. It's the infractucture around that. My blog entries around that, which Douglas pointed out, have the indent to show one possible route to go towards this direction. Nevertheless, it's difficult to show that in examples, since there's a tradeoff in completeness and complexity vs. easy to understand examples and most importantly...time. ;)
Re: [flexcoders] Re: ListBase.as getting called after Drop to Datagrid--Preventing the Drop???
If you're defining your own drag-drop event handlers, I don't think you're supposed to use dropEnabled='true'; dropEnabled='true' means that the default handlers are used. From 'Flex 2 Dev Guide': dropEnabled A Boolean value that specifies whether the control can be a drop target that uses default values for handling items dropped onto it. The default value is false, which means that you must write event listeners for the drag events. When the value is true, you can drop items onto the control by using the default drop behavior. On 06/12/2006, at 4:33 AM, wayneposner wrote: Hi Lach, Nope...My component code looked liked: mx:DataGrid id=cart dragEnabled=true dropEnabled=true dragEnter=onDragEnter(event)/ Still haven't figured out what caused the problem. Wayne
Re: [flexcoders] Could not resolve mx:Effect to a component implementation.
Hi Onur, Um, just a guess but the problem might be that you are trying to instantiate the abstract effect base class when what you actually want to do is use one of the concrete subclasses; e.g. Fade, Resize, Blur etc. See mx.effect in the docs for more explanation of this. Cheers, Lach On 06/12/2006, at 1:03 AM, Onur Ersen wrote: Hi everybody, I'm new to Flex and i have some code having mx:Effects in it. I get error as Could not resolve mx:Effect to a component implementation. I've imported import mx.effects.Effect; but still having the problem. Could anyone help me with this? Thanks in advance.
Re: [flexcoders] Re: ListBase.as getting called after Drop to Datagrid--Preventing the Drop???
As a point of interest, it seems that you can define drop event handlers even without dropEnabled='true'. Then you don't have to do the preventDefault thing. On 06/12/2006, at 11:50 AM, Deepa Subramaniam wrote: That’s actually not true. dropEnabled just indicates that a control allows items to be dropped into it, given that the data format of the items being dropped matches what the control expects. The default DragEvent handlers are used to handle the drag drop operations, though you are always allowed to add your own event handlers to override the default behavior.
Re: [flexcoders] Re: BindSetter?
I think you're right Steve. I have asked myself the same question in the past and ended up using bindProperty… When you say function set ():void or function get ():Something you're really telling the method to masquerade as a property, so it makes sense that you can treat it as such. I have used BindingUtils.bindProperty to bind a setter method and it seems to work. Cheers, Lach On 04/12/2006, at 4:31 PM, Steve Hindle wrote: Sorry for reply to myself - but this is driving me _nuts_! I can't find an example of bindSetter with a 'real' accessor function with either yahoo or google. And the example on the 'bindUtils' page at adobe.com (stuck in the comments at the bottom) - doesn't bind to a 'function set blah'... (isn't that the _required_ to consider a funciton/method a 'setter' ??) It just binds to a 'normal' function. Anyway, I'm starting to think that 'bindSetter' is really a poorly named 'bindFunction' and that _all_ properties - var OR accessor based should be using bindProperty. Can someone confirm/refute this and save my sanity please! Thanks
Re: [flexcoders] FDS on the desktop?
Hi Benjamin, Would you mind explaining how you go about using an embedded SWF in a desktop application. Is there an API for doing that kind of thing? Cheers, Lach On 04/12/2006, at 6:23 PM, benjidudu wrote: Hi, I am doing a desktop application with an embedded swf. I'd like using FDS but all I read is about mxml or swf files in the server along FDS. Is it possible using FDS with swf files not on the FDS server? If yes, how do you do that? Thanks, Benjamin.
Re: [flexcoders] Class-based model as a dataprovider
Hi John, Sorry if I missed the point but I'm not entirely clear on what you're trying to do here. Do you want to unmarshal your XML into an object graph of custom classes? I don't understand how the multiple renderers comes into it. What is the XML describing? Is it a result set or something less regular? With regard to point 2, I think anything can be a dataProvider if it implements one of the accepted interfaces. IList, ICollectionView etc. Cheers, Lach On 04/12/2006, at 11:57 AM, John Mazzocchi wrote: Hi, I need a hand here ... I have an app which reads an XML file, shoves everything into an XMLListCollection and then renders the collection to a one-column datagrid. Each row of the datagrid uses a (state-based) customItemRenderer [don't get me started on the problems I've had with ViewStack-based approach]. Anyway, it seems to work fairly well ... but I've now been asked to take a slightly different approach. The XML needs to be shoved into an Object Model (a custom DOM), so that the same data can have multiple renderers/converters created in the future (not just renderToScreen)... renderToPDF, renderToCSV, etc. Now there are notes in the PDF docs on creating a Class-based model ... I figure I'm gonna create an array of Objects, each one typed as they need to be, you know Bool, Text, Graphics, customSetOfAttribs, whatever ... custom addItem and removeItem functions which use templates for each Object type. 1. Any comments on my methodology? 2. How do I assign an ActionScript class as a dataprovider (for a datagrid)? Thanks. Cheers John
[flexcoders] Feature request: dependant bindings meta-data
Hi Adobe Team,
Is this the right forum to talk about Flex Builder features? I have
often found myself in situations where it would be very handy to say
something like this.
[Bindable] public var firstName:String;
[Bindable] public var lastName:String;
[Bindable(basedOn='firstName,lastName')]
public function get fullName ():String {
return firstName + ' ' + lastName;
}
The idea being that when a binding for firstName or lastName changes,
the dependant binding fullName will also get fired. The only way I
know to do this with the current tools is:
private var _firstName:String;
private var _lastName:String;
[Bindable] public function get firstName():String {
return _firstName;
}
public function set firstName(str:String):void {
_firstName = str;
dispatchEvent(new PropertyChangeEvent('fullNameChanged');
}
[Bindable] public function get lastName():String {
return _lastName;
}
public function set lastName(str:String):void {
_lastName = str;
dispatchEvent(new PropertyChangeEvent('fullNameChanged');
}
[Bindable(event='fullNameChanged')]
public function get fullName ():String {
return firstName + ' ' + lastName;
}
Which is obviously less expressive. It would be great to have a kind
of 'based on' meta-data for bindings as in my example. Or is there a
way to do this already that I don't know about?
Many thanks,
Lach
[flexcoders] List component and state change events
Hi, I have a List control with custom item renderers. The renders have two alternate states and I am using a transition to move between them. The problem seems to be that when the list is scrolled, state change events get fired on the renderers which have just come into view. I think I remember reading that the list controls only use enough renders to display the items which are actually visible at any point, so I am guessing it has something to do with this. The consequence is that the transition gets fired on those renderers even though no actual state change has occurred. Any ideas? Cheers, Lach
Re: [flexcoders] Function Error
Your validateForm() function tries to call a method on a variable
which is null. I'm not sure exactly where you have gone wrong as
your example code is incomplete. Set a break point in the validateForm
() function and run it in the debugger so you can which line throws
the error.
Cheers,
Lach
On 05/12/2006, at 11:59 AM, jmfillman wrote:
When I click on the Submit button, I get the following error:
TypeError: Error #1009: Cannot acces a property or method of a null
object reference.
at main/validateForm()
at main/__btnFormSign_click()
What am I doing wrong?
mx: State name=Forms
mx:AddChild position=lastChild
mx:Canvas width=200 height=31 right=10 top=39
mx:Button label=Submit id=btnFormSign click=validateForm();
mx:Script
![CDATA[
[Bindable]
public var validationAC:ArrayCollection;
public function validateForm() :void {
if (text1.text.length 3) {
validationAC.addItem({label:Text1, data:false});
}
}
/mx:Script
/mx:Button
/mx:Canvas
Re: [flexcoders] Feature request? Ability to apply multiple states or views at once..
You can also create state objects on-the-fly with ActionScript. This
allows you to paramatise the 'state of the state', which might be a
more concise way to manage this task. Create / instantiate / modify
your existing state object, then set it to be current.
On 03/12/2006, at 11:04 AM, Steve Hindle wrote:
Hi Dustin,
It's 'based on' that actually 'teased' me with this...
As you start having more 'optional' things in the component
('noNotes','noSaveButton',etc), you end up with a 'states
explosion'...
'based on' gets about half-way there, so I figured it could be
enhanced to handle the rest?
I could do it all by manually adding/removing child components, but
that seems like overkill.
Thanks!
[flexcoders] Registering for events from an item renderer
Is there a better way? The situation: I have a list view displaying a collection of objects with item renderers. I want the list view to respond to state change events dispatched from the item renderers. The solution (of sorts): Created a new ClassFactory to instantiate the renderers which also registers a delegate (the list view) to receive the events. Why this sucks: It's heaps of code to do a tiny thing. Needed to define a factory class, an interface for the delegate to implement, an implementation of the interface and an event type class to carry a reference to the renderer. Is there a better way? Many thanks, Lach
Re: [flexcoders] correct way to create rectangles ?
Hello Arpan, There's nothing wrong with the way you have done it. Consider, if you create child components for each of the rectangles, you will have to create a new class and paramatise it so they know what colour to draw, then you will have to instantiate them, using up memory and cycles, then you will have to write code to position them and manage them. Is there any added value or functionality in that approach which justifies it versus what you have now? One possible advantage is that you will get layering functionality. Do you need that? There is some middle ground. You can create a class which manages the drawing of the rectangles but which isn't actually a sprite subclass. It could just be a regular object which you can use to draw within the context of your UIComponent. I have used this technique for instance to draw grid lines on a custom chart like component where I wanted to break up the drawing logic but didn't want to create sub- components. The only reason for this is to manage complexity. What you have is perfectly valid. Remember to g.clear() at the beginning unless you want to smear your component when you move or resize it. Cheers, Lach On 01/12/2006, at 6:51 PM, arpan srivastava wrote: Hi, I have to draw 5 rectangle inside a class extending UIComponent. I have done this : // Draw first base rectangle g.beginFill(baseRectColor1); g.drawRect(0,baseY,bRW1,baseRectHeight); g.endFill(); // Draw second base rectangle g.beginFill(baseRectColor2); g.drawRect(bRW1,baseY,bRW2,baseRectHeight); g.endFill(); // Draw third base rectangle g.beginFill(baseRectColor3); g.drawRect(bRW2 + bRW1,baseY,bRW3,baseRectHeight); g.endFill(); is this approach ok or should I create new sprite object for each rectangle and add it to the class. ?
Re: [flexcoders] Problems with dynamic column series showDataEffect
Hi Dan,
I don't have any experience with charting components, but is there a
way to test if the effects are triggered? Do you need to use an
ArrayCollection instead of a plain array to manipulate the series
information? I believe this makes a difference with binding-related
behaviours.
Cheers,
Lach
On 25/11/2006, at 9:08 AM, daannnb wrote:
Hi All
I'm sorry to post this twice, but still no nearer to a solution, I'm
having a few problems assigning data effects to a dynamically
generated column series, while I can create a new series dynamically
ok, just don't seem to be able to get the showDataEffect to work, a
cut down version of the code that I'm using is below;
?xml version=1.0 encoding=utf-8?
mx:Application xmlns:mx=http://www.adobe.com/2006/mxml;
layout=absolute
mx:Script
![CDATA[
import mx.controls.CheckBox;
import mx.collections.*;
import mx.charts.*;
import mx.charts.series.*;
import mx.charts.renderers.*;
import mx.charts.events.*;
import mx.events.*;
// the datasource
[Bindable]
public var rs:ArrayCollection = new ArrayCollection([
{label:'Record One', interval1:20, interval2:30, interval3:40},
{label:'Record Two', interval1:37, interval2:56, interval3:41},
{label:'Record Three', interval1:10, interval2:15, interval3:79}]) ;
/**
* Add another column to chart
[EMAIL PROTECTED] Object - the checkbox event
*/
public function appendInterval(column:String):void
{
var series:ColumnSeries = new ColumnSeries() ;
series.xField = 'label' ;
series.yField = column ;
series.setStyle(showDataEffect, slideIn);
series.setStyle(hideDataEffect, slideOut);
var currentSeries:Array = resultchart.series;
currentSeries.push(series) ;
resultchart.series = currentSeries ;
}
]]
/mx:Script
mx:SeriesSlide id=slideIn duration=1000 direction=up/
mx:SeriesSlide id=slideOut duration=500 direction=down/
mx:Panel id=holder title=Result View width=100%
height=100%
mx:ControlBar id=resultsControBar width=100%
paddingTop=0 paddingLeft=0 paddingBottom=0
mx:Spacer width=100% /
mx:Label text=Append Interval /
mx:CheckBox id=interval1 label=Interval 1
click=appendInterval('interval1')/
mx:CheckBox id=interval2 label=Interval 2
click=appendInterval('interval2')/
mx:CheckBox id=interval3 label=Interval 3
click=appendInterval('interval3')/
/mx:ControlBar
mx:ColumnChart id=resultchart dataProvider={rs}
width=100% height=100%
mx:horizontalAxis
mx:CategoryAxis categoryField=label/
/mx:horizontalAxis
/mx:ColumnChart
/mx:Panel
/mx:Application
Can anyone see what I'm doing wrong? Again, very sorry for the
double post
Regards
Dan
Re: [flexcoders] drawing a stack of rectangle ?
Hi Arpan, What would you _like_ to have happen? On 26/11/2006, at 5:52 PM, arpan srivastava wrote: Hi, I am drawing a stack which contans rectangles of different depending on some value. rectangles are drawn but they are overlapping each other by 1 or 2 pixels at the end. I have to highlight the rectangles also, for that I am creating a rectangle on mouseOver event and adding the rectangle on the same rectangle that I am highlighting, but this way the lower border of the highlighter gets covered by the rectangle below that.
[flexcoders] Cairngorm’s Anaemic Domain Model
Something that troubles me about the Cairngorm architecture is the apparent lack of any proper domain model. Although it is argued that the domain model actually exists on the server and that the Flex client is essentially a view, I have always found it necessary to construct some kind of object graph of the domain on the client as well. I have two concerns regarding this. First, I have never seen examples or discussion of Cairngorm that deals with this issue. In most cases the 'model' isn't much more than a collection of dumb value objects without complex relationships. Second, and more importantly, pretty much all the logic of Cairngorm apps seems to reside in the Command and Delegate classes with not much to speak about in the actual model. It seems to be the Commands that end up manipulating the application data directly, and I'm a little uncomfortable with this. I think Cairngorm’s a good method for managing code and iterative development, but I'm not sure about how well it does encapsulation and MVC. Anyone care to discuss? Cheers, Lach -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/flexcoders/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/flexcoders/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [flexcoders] Best practices for displaying large texts
Hi Pablo, I'm not sure this is the best answer to your question but as far as I know the Text component is the right choice for displaying multi- line, non-editable text. If you want your users to be able to edit the text, you can use a TextArea instead. I'm don't know of a way to do justified text in Flex. Sorry. Lach On 30/11/2006, at 12:15 AM, Pablo Apanasionek wrote: Hey, I'm trying to figure out the best (or at least optimal) way to display a large text (e.g. a news article) with several paragraphs using Flex 2. Would a Text control be the right one to use? Or is there another technique that would render better? Is there any way to justify text on -both- sides? Thanks in advance, Pablo Gustavo Apanasionek
Re: [flexcoders] printf similar function
Hi Misael,
That would be useful as ActionScript string concatenation operations
are fairly clumsy with more than a few pieces. Unfortunately the AS
String class doesn't seem to have such functionality. It's not so
hard to roll your own, because you don't need to worry about the
various types, you just need a single token and call toString() on
all the arguments. Here's a sketch of something, but it's not very
robust. You would have to add checking for zero-length arguments and
other unexpected conditions. It might get a bit trickier also if you
want to do various number formats like hexadecimal.
?xml version=1.0 encoding=utf-8?
mx:Application xmlns:mx=http://www.adobe.com/2006/mxml;
layout=absolute
creationComplete=testFormat()
mx:Script
![CDATA[
import mx.controls.Alert;
public function stringFormat (format:String, ...
args):String
{
var parts:Array = format.split('%@');
// Parts should have one more element that args.
if (parts.length != args.length + 1)
throw new Error(Problem with your
logic!);
var output:String = parts[0];
for (var i:Number = 0; i args.length; i++) {
output += args[i].toString();
output += parts[i + 1];
}
return output;
}
public function testFormat ():void
{
var str:String = stringFormat(Test, %@, insertion, %@, of, %@
vars,
42, 'a string', {prop:'test'});
Alert.show(str);
}
]]
/mx:Script
/mx:Application
Cheers,
Lach
On 07/11/2006, at 11:13 PM, Misael wrote:
Hi,
is there an utility class, function or anything in AS3 with similar
functionality of C printf function? I need to format a string just
like I do it with this function, along with all the capabilities
which comes along (%d, %s, etc).
Thanks!
Re: [flexcoders] {data} current index
Hi Alex,
Item renderers aren't really aware of the wider context in which they
are show (i.e. as one item in a collection). They are only concerned
with how to render the particular data object that is passed to them.
If you want to render some kind of index number on the view, your
best bet is probably to incorporate it in the model somehow. That is,
each item in your collection should have an index property which is
set to equal its position in the collection.
Then you can say
mx:Text text={data.index}/
Cheers,
Lach
On 30/11/2006, at 2:22 AM, Alex wrote:
Hi,
I have an application that uses a custom component as a renderItem in
a TileList, retrieving a list of data from XML as the dataProvider.
How can I retrieve the current index of the item within my custom
component? I can retrieve the data using {data}, but how would I
retrieve the index of the item as it is being added in the actual
TileList?
Re: [flexcoders] Second problem: how to delete a component out of the storage
Hi Matze, I'm curious how you are measuring the 5mb that is apparently leaked on each call to your pop-up. Cheers, Lach On 30/11/2006, at 4:03 AM, matze.kueby wrote: Hello, My second question is how to delete a component out of storage. We have some own components (basically forms), which will be created and shown by an construct e.g. var myComponent : T_Component = new T_Component ; this.addChild(myComponent) Some of our forms will be created in an popup. On every call of the popup, we lost 5 mb or more, all childs on the windows will be removed by formname.removeAllChild(); What cann we do, that the garbage collector will dispose this objects. Is there a way to show all objects with references (NOT NULL)? I have read in the Flex Help, that this.removeChild(myComponent) not delete the form and/or object out of the storage. Rather the object must be destroyed. It is sufficient to call delete(myComponent) about remove this object out of the storage as the case may be that the garbage-collector remove this object at any time? Or how can I destroy a component correctly. What happens with the widgets on this component e.g. input fields or datagrids? Are they also being deleted? Thanks for your help, too. Matze
Re: [flexcoders] Newbie question: Showing a vertical scroll bar on application
Hi Flexy, If you create a popup window using the PopupManager than it is not part of the normal view hierarchy and so it will not create scroll bars on the application object, even if it is placed partially out of the visible region. Pop-ups float above the main application window so they will not affect the size or scroll policy of that object at all. From the docs: The SystemManager maintains multiple lists of children, one each for tooltips, cursors, popup windows. This is how it ensures that popup windows float above the main application windows and that tooltips float above that and cursors above that. If you simply examine the numChildren property or call the getChildAt() method on the SystemManager, you are accessing the main application window and any other windows that aren't popped up. To get the list of all windows, including popups, tooltips and cursors, use the rawChildren property. http://livedocs.macromedia.com/flex/2/langref/mx/managers/ SystemManager.html If you want to scroll them around, perhaps popups are not really what you're after? It is possible to show a scroll bar on the application object, but not through pop-ups. Cheers, Lach On 27/11/2006, at 7:36 AM, Flexy wrote: Hi, I am adding titlewindows using the popupManager on the application canvas, I have many of them so some are beyond the screen height, However, no vertical scrollbar shows – how can I make sure the vertical scroll bar shows if there are controls beyond the screen height? Thanks, Flexy.
Re: [flexcoders] Question on itemRenderer
Hey Ben, First off, if you're allowing your user to manipulate multiple objects at once, you might consider using the multiple selection abilities of the DataGrid (allowMultipleSelection=true) and allow the user to select the rows that way. Second, if the action of a button is effecting multiple objects, it probably makes sense to have that button outside of the item renderer. Anything on the renderer would be assumed to be related to the object being rendered (not the collection). Either way, you should have your button fire off some event to set the delete operation in motion. The code that handles that event (hopefully on some kind of controller, not the item renderer), should check which objects are selected, and include them in the data to the service call. If your button is placed outside of the item renderer, then it can have a reference to the DataGrid as a whole and be able to find it's selectedItems property. Does that answer your question? Cheers, Lach On 25/11/2006, at 6:05 AM, bsdensmore wrote: I have a DataGrid column that is using an itemRenderer to place a checkbox in the Grid. This will allow someone to select multiple rows to delete. I'm slowly starting to understand how to implement an itemRenderer but still unclear on a couple of things. After the user selects the rows they want to delete they will hit a delete button which then triggers a function in the itemRenderer. Should I get which rows were checked then pass those back to a function in the Main application and delete the necessary rows or handle it all in the function that is called in the itemRenderer? I'm not actually deleting rows but I am calling a function in a CFC to update the rows in a database and set their state back to something else. Thanks, Ben
[flexcoders] Disclosure triangles
Hi List, Is it possible to use the disclosure triangle from the Tree view control outside of a tree view? I want to use it to switch between states on an item renderer (a collapsed, summary state, and a full, detail state). There doesn't seem to be a disclosure triangle component. Cheers, Lach
Re: [flexcoders] Disclosure triangles
I might end up having to go that way, but it would be preferable to use an existing framework component, if it exists, so the skin used on the button is that same as the skin used on the tree. Thanks for the suggestion. On 01/12/2006, at 3:09 PM, Gordon Smith wrote: Couldn't you use a Button that has 'toggle' set to true and skinned with triangle graphics? - Gordon From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Lachlan Cotter Sent: Thursday, November 30, 2006 5:38 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] Disclosure triangles Hi List, Is it possible to use the disclosure triangle from the Tree view control outside of a tree view? I want to use it to switch between states on an item renderer (a collapsed, summary state, and a full, detail state). There doesn't seem to be a disclosure triangle component. Cheers, Lach
Re: [flexcoders] Text instance does not calculate its height properly when in scrollable Box
Hi Sergey, I'm not sure what you mean by 'cut by mask'. Is the text being obscured? When I tried your example code it performed as expected without issues. Cheers, Lach On 27/11/2006, at 10:25 PM, Sergey Kovalyov wrote: Hi All! When Text instance is in scrollable Box and user scrolls vertical scrollbar to the bottommost position, bottom edge of the Text remains invisible (cut by mask). How to fix it? Look at the example below that reproduces this behavior:
Re: [flexcoders] Binding to a custom method: possible?
Hi Ben,
Your problem is probably that you have not told Flex when it needs to
fire the binding. The binding mechanism works by broadcasting events
from the setter methods of bindable properties. If there is no direct
setter involved, then Flex does not automatically know to refresh the
data to the binding destination.
The best way I know around this issue is to specify the event type
you want to associate with a change to your calculated value, and
then fire that event when ever any of the arguments to that method
change.
[Bindable(enabledParamsChanged)]
private function isEnabled():Boolean {
if (A) … if (B) … etc
}
Then you need to say something like
private function set valueOfA (arg) {
// Change A here
dispatchEvent(new Event(enabledParamsChanged));
}
private function set valueOfB (arg) {
// Change B here
dispatchEvent(new Event(enabledParamsChanged));
}
Now Flex knows to fire your isEnabled binding when the arguments to
the calculation are altered.
Cheers,
Lach
On 29/11/2006, at 1:13 AM, ben.clinkinbeard wrote:
There was a similar question asked here recently but my needs are
different so I am starting a new thread. My needs are as follows: I
have a ComboBox whose enabled state needs to be determined by several
factors, thus the need for a custom method. The problem is that this
doesn't seem to work, no matter how I try it. Am I missing something
or is this just not possible (meaning I have to set a property and
bind to that)? Fake sample code below:
[Bindable]
private function isEnabled():Boolean
{
if(conditionA)
{
if(conditionB)
{
return true;
}
else
{
return false;
}
}
}
mx:ComboBox id=cb enabled={isEnabled()}/
Thanks,
Ben
Re: [flexcoders] displaying an array result as a pop up dialog
Sounds like you want to say:
Alert.show(your message here)
That will give you a simple pop-up with your confirmation text.
If you want to use a custom component for your pop-up, investigate
the PopupManager class.
Cheers,
Lach
On 28/11/2006, at 10:41 PM, munene_uk wrote:
I have built a simple mail application that allows the user to send a
message to multiple users. once the message is successfully sent it
returns a message i.e the message has been sent to the following
recipients [EMAIL PROTECTED], [EMAIL PROTECTED] e.t.c
the issue is that this data is returned as an array on this function
in which i am using a textbox to display the results, however i would
like to use an alert box to display the results instead.
public function onSendResult(result:Array):void{
var str:String = result.toString();
string_res.htmlText= str;
}
how would i go about doing this?
Re: [flexcoders] application structure and proper practice
Hi, That is an architecture question so it depends on how you have decided delegate responsibilities in your application. As a general guide however: your pop-up windows are views and should be separated from (have no knowledge of) the service calls which are an interface to the application layer. A typical way to achieve this is to broadcast events from your view describing user interactions (e.g. user submits form) passing the object to which the form is bound as the event 'payload'. Listen for these events with your controller and use your event handler to call the webservice or respond as appropriate. Your view needn't know anything about the webservice. Hope that helps. Cheers, Lach On 29/11/2006, at 4:42 AM, bghoward3 wrote: i am in the middle of developing an application with several popup windows that a user can populate and send to a db, i am wondering what the best practice is here in regards to my webservice calls. is it best to keep all of my REQUESTES TIED TO THE WEBSERVICE STORED IN THE PARENT DOCUMENT AND USE FUNCTIONS to interact with the service or should i initate new webservice calls within the pop up window? thanks for any direction on the correct practice to follow
Re: [flexcoders] application structure and proper practice
Hi, That is an architecture question so it depends on how you have decided delegate responsibilities in your application. As a general guide however: your pop-up windows are views and should be separated from (have no knowledge of) the service calls which are an interface to the application layer. A typical way to achieve this is to broadcast events from your view describing user interactions (e.g. user submits form) passing the object to which the form is bound as the event 'payload'. Listen for these events with your controller and use your event handler to call the webservice or respond as appropriate. Your view needn't know anything about the webservice. Hope that helps. Cheers, Lach On 29/11/2006, at 4:42 AM, bghoward3 wrote: i am in the middle of developing an application with several popup windows that a user can populate and send to a db, i am wondering what the best practice is here in regards to my webservice calls. is it best to keep all of my REQUESTES TIED TO THE WEBSERVICE STORED IN THE PARENT DOCUMENT AND USE FUNCTIONS to interact with the service or should i initate new webservice calls within the pop up window? thanks for any direction on the correct practice to follow
Re: [flexcoders] Built-in way to determine the number of XML elements
Why don't you just test the length of the matches element?
?xml version=1.0 encoding=utf-8?
mx:Application xmlns:mx=http://www.adobe.com/2006/mxml;
layout=absolute creationComplete=output()
mx:Script
![CDATA[
[Bindable]
private var xml1:XML = root
matches/
/root;
[Bindable]
private var xml2:XML = root
matches
match/
/matches
/root;
private function output ():void
{
r1.text =
XML(xml1.matches).child('match').length().toString();
r2.text =
XML(xml2.matches).child('match').length().toString();
}
]]
/mx:Script
mx:VBox
mx:Label text=First Result/
mx:TextInput id=r1/
mx:Label text=Second Result/
mx:TextInput id=r2/
/mx:VBox
/mx:Application
On 29/11/2006, at 7:56 AM, Daniel Thompson wrote:
I'm trying to see if a response from the server is empty. So, in
one case I
end up with:
root
matches/
/root
And in the other, I get:
root
matches
match ... /
/matches
/root
Using this fancy E4X, how do I test for the different conditions? I
always
seem to be getting back an XMLList, be it empty or not. I can't
imagine I
have to iterate this and check that it's zero at the end, but
length doesn't
do it, and I can't check for null because I'm always getting an
XMLList.
Thanks,
-DT
[flexcoders] Object serialisation + SimpleXMLEncoder
Hi List,I want to be able to serialise and de-serialise ActionScript objects to XML so they can sent to a server application. I would prefer to write a method for this once that can handle any object. Unfortunately, the introspection API is sadly wanting (doesn't report private members), which makes it insufficient for this purpose. The SimpleXMLEncoder apparently does this, but I can't work out how to use it. Can anybody point me to some examples or offer suggestions for alternative methods?This code produces errors:var myObj:TestClass = new TestClass;var doc:XMLDocument = new XMLDocument;var coder:SimpleXMLEncoder = new SimpleXMLEncoder(doc);var node:XMLNode = coder.encodeValue(myObj, ("" as QName), doc);trace(node.toString());What am I doing wrong?Cheers,Lach
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[flexcoders] Initialization of MXML components
Hi List,I have a question about the initialisation rules for MXML components. My situation is as follows:I have defined a custom MXML component that extends the Canvas class (myComponent).MXML root node of the file, I put a Text element, assigning it an ID (myText).I define a setter method on this class (myProperty) that takes a String argument and passes it to myText.text.I use the custom component in the application, with a tag like this:local:MyComponent myProperty="a value" /Sure enough the instance is created and the setter method is called. However, an error results when I try to access the property of the child Text object. Apparently it has not been initialised when the method is called. This results in an error (setting a property on a null object).My question is if this is the expected behaviour and if there is a way to achieve this with MXML (setting properties of child objects from a setter method called at init time).Thanks for any insights.Cheers,Lach __._,_.___ -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com SPONSORED LINKS Web site design development Computer software development Software design and development Macromedia flex Software development best practice YAHOO! GROUPS LINKS Visit your group "flexcoders" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. __,_._,___
