Re: [flexcoders] Re: Flex - BlazeDS - Java: int are set to 0 when they should be kept to NULL.
David, The int primitive type in Java and Flex cannot be null. They both default to 0. If you have, var myInt:int; // ActionScript int myInt; // Java then that is the same as initializing myInt to 0. Jon On Thu, Sep 10, 2009 at 11:13 AM, whiskerstasters sailorse...@yahoo.com wrote: Hi Tom, in my BlazeDS Debug, all my int variables are set to 0. My flex object variables of type int are pre-set to null and some are not set. When debuging Flex, I noticed Flex automatically sets my variables to 0. Why does this happen? Thank you. -David -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Alternative FAQ location: https://share.acrobat.com/adc/document.do?docid=942dbdc8-e469-446f-b4cf-1e62079f6847 Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.comYahoo! Groups Links
Re: [flexcoders] Re: RegExpValidator Not working with code-behind - SOLVED
Thanks for posting your solution. By the way, I also was able to get
my regex to work from ActionScript by storing as a String and
similarly escaping the curly braces with a backslash. The expression
attribute on mx:RegExpValidator is expecting a String, so attempting
to store in ActionScript as RegExp type did not work for me.
So, I think the following should work for you (untested):
public var expression:String =
^(([01]?[0-9]\{1,2\}|2[0-4][0-9]|25[0-5])\.)\{3\}([01]?[0-9]\{1,2\}|2[0-4][0-9]|25[0-5])$;
and then
mx:RegExpValidator expression={expression} /
Jon
On Mon, Aug 31, 2009 at 4:52 PM, gtb104gtb...@yahoo.com wrote:
The solution was to declare the regexp in the mxml, escaping the { and }
characters. Once I did that, it worked as expected.
mx:RegExpValidator id=ipValidator
expression=/^(([01]?[0-9]\{1,2\}|2[0-4][0-9]|25[0-5])\.)\{3\}([01]?[0-9]\{1,2\}|2[0-4][0-9]|25[0-5])$/
source={tiIPAddress}
property=text
trigger={tiIPAddress}
triggerEvent=change
noMatchError=Invalid IP Address Format./
Geoff
--- In flexcoders@yahoogroups.com, Geoffrey gtb...@... wrote:
Didn't seem to help.
I changed the String to a RegExp, escaped and didn't escape the {}
characters, and also tried with and without the [Bindable] metadata tag. As
long as the regular expression is in the actionscript file, it just doesn't
work properly. Actually, in this instance, nothing ever validates as a
valid IP address.
Geoff
--- In flexcoders@yahoogroups.com, Ian Thomas ian@ wrote:
Geoff,
Try:
public var validIPExpression:RegExp =
/^(([01]?[0-9]\{1,2\}|2[0-4][0-9]|25[0-5])\.)\{3\}([01]?[0-9]\{1,2\}|2[0-4][0-9]|25[0-5])$/;
instead.
Could be because by directly specifying the expression, the MXML-AS
parser correctly decides to treat it as a RegExp. But when directly
binding to the value, binding sees it just as a String.
HTH,
Ian
On Thu, Aug 13, 2009 at 5:17 PM, Geoffreygtb104@ wrote:
We use the code-behind technique to attach AS to MXML. Doing this has
caused
an interesting issue with RegExpValidator. If the regular expression is
defined in the AS file and contains a quantifier, it causes validation to
act funky.
In the following example, if you type about 20 zeroes into the IP field
it
goes from invalid, to valid, and back to invalid. Obviously it should be
invalid after the first zero is typed and stay that way unless a proper
IP
is entered. However, if you take the same regExp string and put it in the
MXML file it works as expected. Note that escaping or not escaping the {
or
} characters while the string is in the AS file has no effect on the
validation.
Test.mxml
-
mx:Application xmlns:mx=http://www.adobe.com/2006/mxml;
xmlns:local=*
minWidth=800 minHeight=600
local:MyComp/
/mx:Application
MyComp.mxml
---
?xml version=1.0 encoding=utf-8?
custom:MyCompScript xmlns:mx=http://www.adobe.com/2006/mxml;
xmlns:custom=*
mx:FormItem id=fiIPAddress
label=IP Address:
required=true
mx:TextInput id=tiIPAddress/
/mx:FormItem
mx:RegExpValidator id=ipValidator
expression={validIPExpression}
source={tiIPAddress}
property=text
trigger={tiIPAddress}
triggerEvent=change
noMatchError=Invalid IP Address Format./
!-- works if you use
expression=^(([01]?[0-9]\{1,2\}|2[0-4][0-9]|25[0-5])\.)\{3\}([01]?[0-9]\{1,2\}|2[0-4][0-9]|25[0-5])$--
/custom:MyCompScript
MyCompScript.as
---
package
{
import mx.containers.Form;
public class MyCompScript extends Form
{
[Bindable]
public var validIPExpression:String =
^(([01]?[0-9]{1,2}|2[0-4][0-9]|25[0-5])\.){3}([01]?[0-9]{1,2}|2[0-4][0-9]|25[0-5])$;
//public var validIPExpression:String =
^(([01]?[0-9]\{1,2\}|2[0-4][0-9]|25[0-5])\.)\{3\}([01]?[0-9]\{1,2\}|2[0-4][0-9]|25[0-5])$;
// Neither of the above work
public function MyCompScript()
{
super();
}
}
}
Does this seem like a bug, or just a limitation introduced by using the
code-behind technique?
Thanks,
Geoff
p.s. Don't know what code-behind is?
http://learn.adobe.com/wiki/display/Flex/Code+Behind
--
Flexcoders Mailing List
FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt
Alternative FAQ location:
https://share.acrobat.com/adc/document.do?docid=942dbdc8-e469-446f-b4cf-1e62079f6847
Search Archives:
http://www.mail-archive.com/flexcoders%40yahoogroups.comYahoo! Groups Links
Re: [flexcoders] Race conditions when event handlers triggered from different targets
Great. The information about how dispatchEvent() works is very helpful, too. Thanks! Jon On Fri, Aug 28, 2009 at 12:16 AM, Gordon Smithgosm...@adobe.com wrote: Yes, that is what Alex is saying. Handler B will not begin before handler A finishes. Event handlers don't get paused. Furthermore, when you (or the Player) calls dispatchEvent(), all the event handlers listening for that event execute before dispatchEvent() returns. Gordon Smith Adobe Flex SDK Team From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Jon Gunnip Sent: Thursday, August 27, 2009 5:21 PM To: flexcoders@yahoogroups.com Subject: Re: [flexcoders] Race conditions when event handlers triggered from different targets Alex, Thanks. Just to be clear, are you saying that once event handler A' begins executing, another event handler B' will not begin executing until A' finishes? Even in a single-threaded environment, not knowing how the flash player works, it is possible that the player could decide to pause an executing event handler to allow another to progress. That would create the scenario I am describing. Jon On Thu, Aug 27, 2009 at 6:54 PM, Alex Haruiaha...@adobe.com wrote: Because actionscript is single-threaded, your scenario cannot happen. Alex Harui Flex SDK Developer Adobe Systems Inc. Blog: http://blogs.adobe.com/aharui -Original Message- From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Jon Gunnip Sent: Thursday, August 27, 2009 1:49 PM To: flexcoders@yahoogroups.com Subject: Re: [flexcoders] Race conditions when event handlers triggered from different targets Thanks, Tracy. I'm not principally concerned with knowing when two operations have completed. I'm more concerned about checking the status of a global variable in event handler A' and then having that variable's value changed by event handler B' before A' is finished executing. In Java you might use a synchronized block for this. I was hoping the flash player might make some guarantees that make a concern like this unnecessary, especially since it executes in a single thread. Are there any resources that describe the internals of the Flash player? Is there a spec like there is for the Java runtime? Thanks, Jon On Thu, Aug 27, 2009 at 12:44 PM, Tracy Spratttr...@nts3rd.com wrote: You can't predict order, but you can be assured that there is no parallel processing of actionscript code. I don't know the internals of the flash player well enough to say in detail but there are rules that control what code is processed when. If you need to know that two async processes have completed, use a flag or dictionary, set a flag value in each handler, and check it in each handler. Tracy Spratt, Lariat Services, development services available From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Jon Gunnip Sent: Thursday, August 27, 2009 10:04 AM To: flexcoders@yahoogroups.com Subject: [flexcoders] Race conditions when event handlers triggered from different targets Hi, I have a concern about possible race conditions in our Flex application. I've read in Essential ActionScript 3.0 that the Flash runtime will not interrupt the execution of an event handler to update the screen. I'm wondering if there are any similar guarantees about the order in which two event handlers registered with different targets are executed. Consider the following: User presses button A triggering event handler A' In same frame, result returned from HTTPService B, triggering event handler B' If A' starts executing before B', will it run to completion before B' starts executing, or could their execution be interleaved? Thanks, Jon -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Alternative FAQ location: https://share.acrobat.com/adc/document.do?docid=942dbdc8-e469-446f-b4cf-1e62079f6847 Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.comYahoo! Groups Links -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Alternative FAQ location: https://share.acrobat.com/adc/document.do?docid=942dbdc8-e469-446f-b4cf-1e62079f6847 Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.comYahoo! Groups Links
[flexcoders] Race conditions when event handlers triggered from different targets
Hi, I have a concern about possible race conditions in our Flex application. I've read in Essential ActionScript 3.0 that the Flash runtime will not interrupt the execution of an event handler to update the screen. I'm wondering if there are any similar guarantees about the order in which two event handlers registered with different targets are executed. Consider the following: User presses button A triggering event handler A' In same frame, result returned from HTTPService B, triggering event handler B' If A' starts executing before B', will it run to completion before B' starts executing, or could their execution be interleaved? Thanks, Jon
Re: [flexcoders] Race conditions when event handlers triggered from different targets
Thanks, Tracy. I'm not principally concerned with knowing when two operations have completed. I'm more concerned about checking the status of a global variable in event handler A' and then having that variable's value changed by event handler B' before A' is finished executing. In Java you might use a synchronized block for this. I was hoping the flash player might make some guarantees that make a concern like this unnecessary, especially since it executes in a single thread. Are there any resources that describe the internals of the Flash player? Is there a spec like there is for the Java runtime? Thanks, Jon On Thu, Aug 27, 2009 at 12:44 PM, Tracy Spratttr...@nts3rd.com wrote: You can’t predict order, but you can be assured that there is no parallel processing of actionscript code. I don’t know the internals of the flash player well enough to say in detail but there are rules that control what code is processed when. If you need to know that two async processes have completed, use a flag or dictionary, set a flag value in each handler, and check it in each handler. Tracy Spratt, Lariat Services, development services available From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Jon Gunnip Sent: Thursday, August 27, 2009 10:04 AM To: flexcoders@yahoogroups.com Subject: [flexcoders] Race conditions when event handlers triggered from different targets Hi, I have a concern about possible race conditions in our Flex application. I've read in Essential ActionScript 3.0 that the Flash runtime will not interrupt the execution of an event handler to update the screen. I'm wondering if there are any similar guarantees about the order in which two event handlers registered with different targets are executed. Consider the following: User presses button A triggering event handler A' In same frame, result returned from HTTPService B, triggering event handler B' If A' starts executing before B', will it run to completion before B' starts executing, or could their execution be interleaved? Thanks, Jon -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Alternative FAQ location: https://share.acrobat.com/adc/document.do?docid=942dbdc8-e469-446f-b4cf-1e62079f6847 Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.comYahoo! 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:flexcoders-dig...@yahoogroups.com mailto:flexcoders-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: flexcoders-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [flexcoders] Race conditions when event handlers triggered from different targets
Alex, Thanks. Just to be clear, are you saying that once event handler A' begins executing, another event handler B' will not begin executing until A' finishes? Even in a single-threaded environment, not knowing how the flash player works, it is possible that the player could decide to pause an executing event handler to allow another to progress. That would create the scenario I am describing. Jon On Thu, Aug 27, 2009 at 6:54 PM, Alex Haruiaha...@adobe.com wrote: Because actionscript is single-threaded, your scenario cannot happen. Alex Harui Flex SDK Developer Adobe Systems Inc. Blog: http://blogs.adobe.com/aharui -Original Message- From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Jon Gunnip Sent: Thursday, August 27, 2009 1:49 PM To: flexcoders@yahoogroups.com Subject: Re: [flexcoders] Race conditions when event handlers triggered from different targets Thanks, Tracy. I'm not principally concerned with knowing when two operations have completed. I'm more concerned about checking the status of a global variable in event handler A' and then having that variable's value changed by event handler B' before A' is finished executing. In Java you might use a synchronized block for this. I was hoping the flash player might make some guarantees that make a concern like this unnecessary, especially since it executes in a single thread. Are there any resources that describe the internals of the Flash player? Is there a spec like there is for the Java runtime? Thanks, Jon On Thu, Aug 27, 2009 at 12:44 PM, Tracy Spratttr...@nts3rd.com wrote: You can't predict order, but you can be assured that there is no parallel processing of actionscript code. I don't know the internals of the flash player well enough to say in detail but there are rules that control what code is processed when. If you need to know that two async processes have completed, use a flag or dictionary, set a flag value in each handler, and check it in each handler. Tracy Spratt, Lariat Services, development services available From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Jon Gunnip Sent: Thursday, August 27, 2009 10:04 AM To: flexcoders@yahoogroups.com Subject: [flexcoders] Race conditions when event handlers triggered from different targets Hi, I have a concern about possible race conditions in our Flex application. I've read in Essential ActionScript 3.0 that the Flash runtime will not interrupt the execution of an event handler to update the screen. I'm wondering if there are any similar guarantees about the order in which two event handlers registered with different targets are executed. Consider the following: User presses button A triggering event handler A' In same frame, result returned from HTTPService B, triggering event handler B' If A' starts executing before B', will it run to completion before B' starts executing, or could their execution be interleaved? Thanks, Jon -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Alternative FAQ location: https://share.acrobat.com/adc/document.do?docid=942dbdc8-e469-446f-b4cf-1e62079f6847 Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.comYahoo! Groups Links -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Alternative FAQ location: https://share.acrobat.com/adc/document.do?docid=942dbdc8-e469-446f-b4cf-1e62079f6847 Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.comYahoo! Groups Links
Re: [flexcoders] Data binding inside Repeater?
I was looking into a problem similar to this a few days ago. I
noticed in the Repeater.as framework code, that it ignores changes to
the dataProvider collection that are of type
CollectionEventKind.UPDATE. Thus, if you modify an item in the
underlying data provider, the repeater will not update. If you
add/remove an item, it will update.
Jon
On Fri, Aug 14, 2009 at 2:54 AM, Roman Protsiukroman.prots...@gmail.com wrote:
And what if Object would not be generic Object but rather class
DataProviderContainer { [Bindable]public var dataProvider:ArrayCollection;}
I assume your dynamic property dataProvider on Object is not bindable.
Roman Protsiuk
Software Engineer/Engineering Team Lead
http://under.in.ua
Kyiv, Ukraine (GMT+2)
mobile: +38 097 321 56 54 email: roman.prots...@gmail.com skype: roman.protsiuk
linkedin: http://www.linkedin.com/in/romanpv blogspot: http://roma-ch.blogspot.com
On Fri, Aug 14, 2009 at 12:53 AM, gmbroth gmbr...@hotmail.com wrote:
Hi,
I'm having a bit of trouble using the following combination of data
binding and Repeater and could use some enlightenment:
mx:ArrayCollection id=fred some data here... /mx:ArrayCollection
mx:ArrayCollection id=measurements
mx:Object dataProvider={fred} /
/mx:ArrayCollection
mx:Repeater id=measurementRepeater dataProvider=measurements
my:Chart dataProvider={measurementRepeater.currentItem.dataProvider} /
/mx:Repeater
The intention is to have my chart bind to 'fred' via the Repeater
iteration over measurements, a kind of double-binding, I suppose. My chart
component does render the initial data in 'fred' but doesn't respond to
subsequent changes to 'fred', i.e., I'm not getting dynamic binding. But if
I change the repeater line above to this:
my:Chart dataProvider={fred} /
then everything works as expected. Is there a way to do in MXML what I'm
trying to do above?
Thanks, Garry
