[flexcoders] Setting default selectedIndex
I have what may seem a silly question to all you Flex Ninjas out there, but I need to do the following and can't seem to find the right way to do so : I have a TileList with a custom itemRenderer, each item being a thumbnail. The dataProvider is populated from a RemoteObject call. Next to the TileList I have a VBox containing an Image and Label. Now, when the user clicks on a thumbnail in the TileList, the Image and Label change accordingly using selectedItem. No problem. When the app first loads, I can use the creationComplete() event of the TileList to manually set the selectedIndex to 1 and therefore display the first thumbnail in my main Image control. Now the problem comes in, when the TileList's dataProvider changes (i.e. the user performs a search and the thumbnail list gets updated) - how do I then manually set the TileList's selectedIndex back to 1, since it seems to get cleared automatically (for good reason). I just have no idea which event to listen for - dataChange doesn't seem to work and having gone through the API, I can't see any other event which I can use. I'm also assuming here that only the TileList in this instance has a selectedIndex property. Like I said, it seems like a silly problem to have, and I'm getting pretty frustrated being held up by something this basic. Any help would be much appreciated - even if it's a pointer to a manual entry, anything :) TIA, Barry
[flexcoders] Re: Setting default selectedIndex
Hi Alex, Thanks for the tip. The problem for me though - is that I'm trying to learn how the Mate Framework functions and I have no idea how to access the TileList's selectedIndex from the class handling the RO event response. Or any other UI component for that matter. Hell, I'm not even making sense to myself anymore ;) --- In flexcoders@yahoogroups.com, Alex Harui [EMAIL PROTECTED] wrote: Normally, I'd just set it whenthe result event from the RO is dispatched. If you have everything wired up via binding, you could try CollectionChangeEventKind.RESET From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of calisza Sent: Monday, July 28, 2008 12:55 AM To: flexcoders@yahoogroups.com Subject: [flexcoders] Setting default selectedIndex I have what may seem a silly question to all you Flex Ninjas out there, but I need to do the following and can't seem to find the right way to do so : I have a TileList with a custom itemRenderer, each item being a thumbnail. The dataProvider is populated from a RemoteObject call. Next to the TileList I have a VBox containing an Image and Label. Now, when the user clicks on a thumbnail in the TileList, the Image and Label change accordingly using selectedItem. No problem. When the app first loads, I can use the creationComplete() event of the TileList to manually set the selectedIndex to 1 and therefore display the first thumbnail in my main Image control. Now the problem comes in, when the TileList's dataProvider changes (i.e. the user performs a search and the thumbnail list gets updated) - how do I then manually set the TileList's selectedIndex back to 1, since it seems to get cleared automatically (for good reason). I just have no idea which event to listen for - dataChange doesn't seem to work and having gone through the API, I can't see any other event which I can use. I'm also assuming here that only the TileList in this instance has a selectedIndex property. Like I said, it seems like a silly problem to have, and I'm getting pretty frustrated being held up by something this basic. Any help would be much appreciated - even if it's a pointer to a manual entry, anything :) TIA, Barry
[flexcoders] Removing ArrayCollection item from within ItemRenderer
After having a look around at various blogs, resources etc I'm stumped on the following : I have a TileList using a custom itemRenderer. The dataprovider is a standard ArrayCollection of objects. The itemRenderer contains an Image, a Label and a Button. When the user clicks the button - I want to remove that particular item from both the Tilelist and the dataProvider. The problem is that parent.removeChild(this) only works partially (it clears the tilelist block of the item's content, but the empty block remains in place... still highlighted). I also have no idea how to access the dataProvider from within the itemRenderer. parent.dataProvider and owner.dataProvider don't seem to work, my guess being that dataProvider is a private property. Any ideas ? Is there perhaps a better way of doing this ? (still new to flex so still learning). TIA, Barry
[flexcoders] Re: Removing ArrayCollection item from within ItemRenderer
Hi Tim, Thanks so much, your tips did the trick. I'm going to go the whole event dispatching route, but it's good to know how to access the parentDocument elements. And ditto on the removeChild bit - i had to laugh at myself when I read your response - it's how we learn :) thanks again, B --- In flexcoders@yahoogroups.com, Tim Hoff [EMAIL PROTECTED] wrote: Hi Barry, Sorry to laugh a little, but parent.removeChild(this), is actually removing the itemRenderer display object; and leaving a hole in the TileList. There are a few ways to remove list items; from within an itemRenderer. But, most of them involve referencing the list's dataProvider directly; using something like: myArrayCollection.removeItemAt(myTileList.selectedIndex); Now, how do you get to the dataProvider from within the itemRenderer. Probably the best way is to dispatch an event when the delete button is clicked. Using events takes advantage of loose coupling. Listen for the event in the class that contains the TileList and remove the item from the dataProvider. Depending on how you have it setup, chances are that when you click the button inside the itemRenderer, the TileList's selected item and index will change automatically. Another way, if you want to get dirty, is to do something like this on the click event of the delete button: this.parentDocument.myTileList.dataProvider.removeItemAt(listData.rowInd\ ex); -TH --- In flexcoders@yahoogroups.com, calisza barry@ wrote: After having a look around at various blogs, resources etc I'm stumped on the following : I have a TileList using a custom itemRenderer. The dataprovider is a standard ArrayCollection of objects. The itemRenderer contains an Image, a Label and a Button. When the user clicks the button - I want to remove that particular item from both the Tilelist and the dataProvider. The problem is that parent.removeChild(this) only works partially (it clears the tilelist block of the item's content, but the empty block remains in place... still highlighted). I also have no idea how to access the dataProvider from within the itemRenderer. parent.dataProvider and owner.dataProvider don't seem to work, my guess being that dataProvider is a private property. Any ideas ? Is there perhaps a better way of doing this ? (still new to flex so still learning). TIA, Barry
[flexcoders] Tilelist, ItemRenderer not refreshing when updating dataProvider
I have the following scenario, I have a tilelist displaying images, each of which is being created via a custom ItemRenderer. So far so good. Now, I have an upload button, which when clicked, pops-up a TitleWindow and allows the user to add files for upload. They click upload and everything works perfectly, files get sent to server, file gets saved and server sends back an XML response which I then use to update the TileList ItemRenderers dataProvider. In other words, a new image gets appended to the dataProvider array. Now this all works perfectly except for the following : The new image is not displayed inside the TileList - at least not right away. As soon as I scroll the TileList the new image appears. So what this means is that the new image is only displayed when the TileList or the screen is refreshed - however, I cannot find any way of doing this programatically. I've tried using super.commitProperties() to no avail, unless I'm calling it from the wrong place - currently calling it from a method within my upload titleWindow. I've done all the usual searching, reading etc but I've come up blank. Is there a way around this I'm just not seeing ? Any pointers in the right direction would be greatly appreciated. thanks.
[flexcoders] Re: Tilelist, ItemRenderer not refreshing when updating dataProvider
The dataProvider is a property of a Cairngorm VO. So, I have a productVO, of which images is a property (Array), so the dataProvider is product.VO - the thing is, the dataProvider IS being updated, its just the display that's not being displayed. As soon as I select another product, and then switch back to the product in question, or if I scroll up and then down in the TileList itself, the newly uploaded image appears. thanks, Barry --- In flexcoders@yahoogroups.com, Tracy Spratt [EMAIL PROTECTED] wrote: Are you using the dataPrvoider API to update the dataProvider? What is the dataProvider? Tracy From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of calisza Sent: Thursday, July 10, 2008 2:56 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] Tilelist, ItemRenderer not refreshing when updating dataProvider I have the following scenario, I have a tilelist displaying images, each of which is being created via a custom ItemRenderer. So far so good. Now, I have an upload button, which when clicked, pops-up a TitleWindow and allows the user to add files for upload. They click upload and everything works perfectly, files get sent to server, file gets saved and server sends back an XML response which I then use to update the TileList ItemRenderers dataProvider. In other words, a new image gets appended to the dataProvider array. Now this all works perfectly except for the following : The new image is not displayed inside the TileList - at least not right away. As soon as I scroll the TileList the new image appears. So what this means is that the new image is only displayed when the TileList or the screen is refreshed - however, I cannot find any way of doing this programatically. I've tried using super.commitProperties() to no avail, unless I'm calling it from the wrong place - currently calling it from a method within my upload titleWindow. I've done all the usual searching, reading etc but I've come up blank. Is there a way around this I'm just not seeing ? Any pointers in the right direction would be greatly appreciated. thanks.
[flexcoders] Re: Tilelist, ItemRenderer not refreshing when updating dataProvider
I've been wondering about that and am in the process of testing this. Will let you know what happens :). Just noticed a typo in my previous post - should read product.images and not product.VO --- In flexcoders@yahoogroups.com, jack_freud [EMAIL PROTECTED] wrote: Could it be that you need to use an ArrayCollection rather than an array? I think binding to Array only shows changes if the array itself is replaced, not its items. Jack --- In flexcoders@yahoogroups.com, calisza barry@ wrote: The dataProvider is a property of a Cairngorm VO. So, I have a productVO, of which images is a property (Array), so the dataProvider is product.VO - the thing is, the dataProvider IS being updated, its just the display that's not being displayed. As soon as I select another product, and then switch back to the product in question, or if I scroll up and then down in the TileList itself, the newly uploaded image appears. thanks, Barry --- In flexcoders@yahoogroups.com, Tracy Spratt tspratt@ wrote: Are you using the dataPrvoider API to update the dataProvider? What is the dataProvider? Tracy From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of calisza Sent: Thursday, July 10, 2008 2:56 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] Tilelist, ItemRenderer not refreshing when updating dataProvider I have the following scenario, I have a tilelist displaying images, each of which is being created via a custom ItemRenderer. So far so good. Now, I have an upload button, which when clicked, pops-up a TitleWindow and allows the user to add files for upload. They click upload and everything works perfectly, files get sent to server, file gets saved and server sends back an XML response which I then use to update the TileList ItemRenderers dataProvider. In other words, a new image gets appended to the dataProvider array. Now this all works perfectly except for the following : The new image is not displayed inside the TileList - at least not right away. As soon as I scroll the TileList the new image appears. So what this means is that the new image is only displayed when the TileList or the screen is refreshed - however, I cannot find any way of doing this programatically. I've tried using super.commitProperties() to no avail, unless I'm calling it from the wrong place - currently calling it from a method within my upload titleWindow. I've done all the usual searching, reading etc but I've come up blank. Is there a way around this I'm just not seeing ? Any pointers in the right direction would be greatly appreciated. thanks.
[flexcoders] Re: Tilelist, ItemRenderer not refreshing when updating dataProvider
Ok excellent, changing from Array to ArrayCollection has solved the problem. Lesson learned :) thanks for the help. --- In flexcoders@yahoogroups.com, calisza [EMAIL PROTECTED] wrote: I've been wondering about that and am in the process of testing this. Will let you know what happens :). Just noticed a typo in my previous post - should read product.images and not product.VO --- In flexcoders@yahoogroups.com, jack_freud jack_web@ wrote: Could it be that you need to use an ArrayCollection rather than an array? I think binding to Array only shows changes if the array itself is replaced, not its items. Jack --- In flexcoders@yahoogroups.com, calisza barry@ wrote: The dataProvider is a property of a Cairngorm VO. So, I have a productVO, of which images is a property (Array), so the dataProvider is product.VO - the thing is, the dataProvider IS being updated, its just the display that's not being displayed. As soon as I select another product, and then switch back to the product in question, or if I scroll up and then down in the TileList itself, the newly uploaded image appears. thanks, Barry --- In flexcoders@yahoogroups.com, Tracy Spratt tspratt@ wrote: Are you using the dataPrvoider API to update the dataProvider? What is the dataProvider? Tracy From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of calisza Sent: Thursday, July 10, 2008 2:56 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] Tilelist, ItemRenderer not refreshing when updating dataProvider I have the following scenario, I have a tilelist displaying images, each of which is being created via a custom ItemRenderer. So far so good. Now, I have an upload button, which when clicked, pops-up a TitleWindow and allows the user to add files for upload. They click upload and everything works perfectly, files get sent to server, file gets saved and server sends back an XML response which I then use to update the TileList ItemRenderers dataProvider. In other words, a new image gets appended to the dataProvider array. Now this all works perfectly except for the following : The new image is not displayed inside the TileList - at least not right away. As soon as I scroll the TileList the new image appears. So what this means is that the new image is only displayed when the TileList or the screen is refreshed - however, I cannot find any way of doing this programatically. I've tried using super.commitProperties() to no avail, unless I'm calling it from the wrong place - currently calling it from a method within my upload titleWindow. I've done all the usual searching, reading etc but I've come up blank. Is there a way around this I'm just not seeing ? Any pointers in the right direction would be greatly appreciated. thanks.
