Flex :: Flash - Programmatically Select An Item In A List After DataProvider Is Updated?
Jan 2, 2011
I have a Spark List container whose dataProvider is bound to a result set coming back from a RemoteObject call. Pretty standard stuff.
<s:List id="list" dataProvider="{model.stuff}" width="100%" height="100%"
selectedIndex="@{selectedSlider.value}"
itemRenderer="{stuffRenderer}">
</s:List>
The selectedIndex is associated with an HSlider, but that is not the problem. My issue is that I would like to automatically select a certain "preferred" element from the list (only initially...to guide the user).
I tried to do that in a creationComplete event but my data hadn't shown up yet...setting selectedIndex didn't work..
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Jan 26, 2011
i have a Flex tree control and im trying to select a tree node 3 levels down right after the dataProvider is assigned with a collection object like the following.basically treeItem1, treeItem2, treeItem3 are the nodes in the tree and treeitem3 is a child of treeItem2 which is a child of treeItem1. Assume these treeItem(1,2,3) are referenced correctly from the collection items.
my problem is that if i wait for the whole component to load completely then select the nodes, it open/select/scrolltoIndex correctly. However, if i were to select the node right after the dataProvider is assigned, then it doesn't even open or select (basically the this.treeService.selectedItem is always null).
this.treeService.dataProvider = oPricingHelper.getCurrentPricingSercicesTreeSource();
this.treeService.expandItem(treeItem1, true);
this.treeService.expandItem(treeItem2, true);
this.treeService.selectedItem = treeItem3;
this.treeService.scrollToIndex(this.treeService.selectedIndex);
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Dec 14, 2010
In Flex 4, I have a Spark List component with item renderers. I would like to select an item in the List by clicking on it, and deselect it also, by clicking on the same selected item. Like an on/off switch.
My item renderer has the following states:
<s:states>
<s:State name="normal"/>
<s:State name="hovered"/>
<s:State name="selected"/>
</s:states>
so I tried to add a click event listener to the item renderer with:
private function selectUnSelect():void {
if (currentState == 'selected') currentState = 'normal';
else currentState = 'selected';
}
with an awkward behaviour... where the item stay selected even after clicking it again in the selected state.
Think of using the List component without the Command (on mac) or the Control button on windows.
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Dec 21, 2010
I have a spark List defined as:
<s:List id="symbolList" dataProvider="{symbolListCollection}" change="symbolNameChangeHandler(event)"></s:List>
With the change handler defined like this:
protected function symbolNameChangeHandler(event:IndexChangeEvent):void {
symbolList.validateProperties();
changeSymbolView(symbolList.selectedItem);
}
and symbolListCollection as an ArrayList filled with Strings.
At first, the change event works fine, and I get what I expect.
However, if I Ctrl-click on the selected item, to de-select it, i am unable to ever select an item again.
When I click on something to try to select it, the change event DOES fire, however, the ItemChangeEvent has both oldIndex and newIndex set to -1
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Jul 13, 2009
I want to be able to select an item from my list component and fire a function directly related to selecting that item. list is called "tidlist" function is "selecttid(n)" the "n" needs to be replaced with the index number... so if run my swf and the list component displays my items... when i select one (the third one for example)... i want to fire "selectTid(3)".... cant seem to grasp.
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Jul 13, 2009
I want to be able to select an item from my list component and fire a function directly related to selecting that item.
list is called "tidlist"
function is "selecttid(n)"
the "n" needs to be replaced with the index number... so if run my swf and the list component displays my items... when i select an item (the third one for example)... i want to fire "selectTid(3)".... cant seem to grasp.
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Feb 22, 2010
i am working on an aplication using flex,adobe air...i have a datagrid with a XML as my dataprovider...during the execution of program my XML is updated....after XMl is updated and saved my datagrid should also get update..I have used Dataprovidername.refresh() method but it is not working.
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Feb 15, 2011
I have this datagrid:
<mx:DataGrid id="dgCompetenteN" includeIn="Test" left="10" right="472" top="69" bottom="149"
dataProvider="{colCompetente}" editable="false">
<mx:columns>
[Code]....
What I want to do is, when I select an item in the datagrid, the selected item of the dropdown should be the correct one (the one which has the field idCompSuperioara equal to the third element in the selected datagrid row).
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Feb 28, 2009
Is there a way to programmatically set flash to make sure it is the most updated copy of the swf? Let me see if can be clearer as I really don't know how to ask. Say I am building a movie and I just changed it, I open my browser and see the old version. I have to clear my cache to get the updated version. Is there a way of making flash "clear its cache" so to speak? I tried googling "SWF updated ActionScript" or variations of that, but calamity ensued.
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Feb 3, 2011
Is there a way so that every time the list is changed (data add, data deleted, etc.), the list will re-update or "refresh?"
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Feb 16, 2010
I have a Datagrid thats being populated by different Arrays... (headers/columns change for the same DataGrid)... I would like to Select a Column of the Datagrid after it was generated by the Dataprovider and Bold it, and place it as the 'last column"
This is what I have.... and throwing an error:
private function populateGrid(evt:Object):void {
dg.dataProvider = evt as Array;
if (dg.columns.length > 0) {
for (var i:int = 0; i < dg.columns.length; i++) {
if (dg.columns[i].dataField == '_user_total') {
DataGridColumn((dg.columns[i].dataField)).setStyle('fontWeight', 'bold');
}}}}
This way I would like to have One Datagrid (for different Arrays) )without having the Columns fixed and declared (like in MXML), but dynamic, and would like a 'specific' column to be Bolded, and placed as the last column, in this example, the column with dataField _user_total.
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Sep 5, 2010
What I would like to do is simply add to a dataProvider, but when I do, I get an error. Here's the code I'm trying to run...
dg.dataProvider.addItem(obj.ResultSet.Result[i]);
It's inside a for loop, using i as the integer. It works great doing...dg.dataProvider = obj.ResultSet.Result But that won't work for me, because I need to add to the dataprovider more than once. I'm getting results in batches of 10, and I need to add each batch to the dataProvider when it's received. I also tried to to do...
var dgDP:dataProvider = new dataProvider(); But for some reason Flex doesn't recognize it...
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Feb 3, 2012
Here is my code.I run this code on change event.
for(var i:uint =0; i< model.medicalHistoryDTOListByPatient.length; i++)
{
if(formatDateTime.format(model.medicalHistoryDTOListByPatient[i].VisitDate) ==
[code]......
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Jul 9, 2009
I have a DataGrid of objects, and I want to modally edit them; pop up a dialog, change the item, and if the user clicks "Ok", save the changes back to the original item, and if they click "Cancel", do nothing. It seems obvious that if I simply pass in a reference to the original object and change it using data bindings to the fields in the edit form, I won't be able to cancel my edits. How can I support that capability?
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Jun 10, 2011
I'm creating a mobile app in which I need to show a calendar with months at the top. The months are part of a component that extends from SkinnableDataContainer (and has some custom scrolling/behaviour - which is why I did'nt use a spark list). I need the months to be shown as a 'trapezium' shaped tab and so I'm using a png image as a mask in the item renderer for the component.
When the mask is not applied, it all works well - the months render, the list/data container selection works when I click on a month and so on.When the mask is applied, it renders well, scrolling and everything else seems to work well - but when I click on a month, nothing happens visually. And from the trace statements in my code, it appears list item selection is not changing. Looks like mouse clicks are not working.
Code:
public class TopCalendarMonthRenderer extends LabelItemRenderer {
[Embed(source="/assets/trapezium_alpha.png")]
private static var TrapeziumMask:Class;
private static var trapeziumMaskInstance:BitmapAsset;
[code]...
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Jan 26, 2011
I need to programmatically set the selected item in a combobox. I've got a combobox like this:
<mx:ComboBox id="MyComboBox" change="puzzleHandler(event);"prompt="Make a Selection">
<mx:ArrayCollection id="myDP">
<mx:Object id="first" label="Label 1" series="2" pageTitle="Title 1"/>
<mx:Object id="second" label="Label 2" series="7" pageTitle="Title 2"/>
<mx:Object id="third" label="Label 3" series="9" pageTitle="Title 3"/>
</mx:ArrayCollection></mx:ComboBox>
I've got a function that regards deep linking. [URL]. They'll be taken to the appropriate part of the site (without having selected Label 2 in the comboBox). How do I set the comboBox programatically, so that it corresponds with what the user it looking at? In my function's switch statement, I want to set the comboBox to the label that corresponds with the view. If "view=2" then the comboBox should show "Label 2" as selected.
case "view=1":
MyComboBox.selectedItem.label="Label 1";
parseUrl();
case "view=2":
[Code] .....
I tried this: MyComboBox.selectedItem.label="Label 1" But it's not working.
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Mar 22, 2011
I have this MenuBar control in Flex 3. How can I programmatically change the toggled property to false?
<mx:MenuBar labelField="@label" itemClick="itemClickHandler(event);" left="0" right="0" top="0" id="menuBar">
<mx:XMLList><menuitem label="File" data="top">
<menuitem label="New" data="file-new"/></menuitem>
<menuitem label="View" >
<menuitem label="Grid" type="check" toggled="true" data="view-grid"/>
</menuitem></mx:XMLList></mx:MenuBar>
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May 25, 2010
I'm using a List which I need to be empty at the start. I'm adding items to it as needed by clicking a button. Since it's empty, I haven't added a dataProvider property
<s:List id="thelist" itemRenderer="listIR" />
To add an item, I'm adding it to the dataProvider directly
thelist.dataProvider.addItem()
but when I do that, it gives me this error
#1009: Cannot access a property or method of a null object reference.
Also I have a debugging Alert in the listIR itemRenderer itself and I see that when the list is created, I get that alert twice as if 2 itemRenderers were created, even though the list is supposed to be empty at the start.
How do I start with an empty dataProvider and add items smoothly to it?
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Oct 26, 2010
In Flex I can create an ItemRenderer to represent each item in the Lists DataProvider but how do I access the instance of the ItemRenderer via the DataProviders Object? Something like myList.getItemRenderer(dp.getItemAt(10));
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Jul 10, 2011
I have a component that contains a list that implements a custom renderer. I use this component as a tooltip, keeping one in memory and just altering the databindings as necessary.
Something like this where TTComponent is a class that extends Canvas:
<s:TTComponent>
<s:BorderContainer>
<s:List id='lstItems' dataProvider="{data.Items}" width="50%" borderVisible="false" contentBackgroundColor="#222222">
[Code]....
Now, what happens is when data containing many items is set to tt.data, the list resizes itself larger and displays fine. However, after this, if data containing few items is set to tt.data, the component momentarily displays larger than it needs to be, then resizes itself smaller.
What I'd like to do is have the component resize itself before it displays, so I don't see the resize on screen.
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Jan 27, 2012
I have some xml, I want to give it to a List dataprovider, but based on an attribute match.
My Xml
<components>
<rows name="general">
<objects name="Start" image16="startflag16" image32="startflag32" class="someclass">
[Code].....
And I am trying to do something like below, If I remove (@name=="general") from below line it gives me all property
listView.dataProvider=list_components.rows(@name=="general").objects.property;
But it gives me error, so basically I want to get all property based on rows attribute name matching general
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Feb 21, 2012
I have this error. I am very very new to the Flex world. I have this function which returns an ArrayList.
public function createDataProvider():ArrayList {
....
return new ArrayList(imgArray);
}
Later, I use it here:
<s:List id="pubmapList" dragEnabled="false" dropEnabled="false" dragMoveEnabled="false" dataProvider="{createDataProvider}">
Here, I got an error saying: implicit coercion of a value of type to an unrelated type mx.collections.ilist. I thought the IList implementation includes ArrayList.
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Mar 13, 2012
In flex 4.5, I have an application that has a BorderContainer that loads a spark list (mxml style - _myList and the borderContainer is stored in a library outside of the parent application) that loads an arrayCollection with an itemRenderer (I should note said itemRenderer is not an inline renderer - on selection of an item in the list, the itemRenderer expands, loads a particular control within the item renderer based on data passed from the selected item in the list) and allows the user to perform a search. This works all well and good on startup/load, until I try to change the dataProvider for the list (my app allows users to switch data sources which then creates a new dataProvider with new variables). I have tried:
[Code]...
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May 4, 2011
Objective:I would like to pass Skins to an itemRenderer (which is a Button) of a List, and be able to skin every button in that List.This is what I have:
List:
<s:List itemRenderer="renderers.ItemRenderer" dataProvider="{collectionWorkspace}" />
ArrayCollection:
<s:ArrayCollection id="collectionWorkspace">
<comp:Layout1 />[code]...
I get an error (fixed for clarification):Error: Skin for Application....Button1 cannot be found.
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Jun 30, 2011
I have a simple list and a background refresh protocol.When the list is scrolled down, the refresh scrolls it back to the top. I want to stop this.I have tried catching the COLLECTION_CHANGE event and validateNow(); // try to get the component to reset to the new datalist.ensureIndexIsVisible(previousIndex); // actually, I search for the previous data id in the IList, but that's not importantThis fails because the list resets itself after the change).I hate to use a Timer, ENTER_FRAME, or callLater(), but I cannot seem to figure out a way.The only other alternatives I can see is sub-classing the List so it can catch the dataProviderChanged event the DataGroup in the skin is throwing.
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Jul 25, 2009
I have made the following item renderer in mxml, but when I use it in a list for some reason I can not select it. Am I doing something wrong?
<mx:HBox xmlns:mx="http://www.adobe.com/2006/mxml"
horizontalScrollPolicy="off">
<mx:Script>
[code]......
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Dec 21, 2010
what I need to do is combine 5 arrays with 5 individual strings (which have come from a JSON webservice) into one single list item in FlashBuilder Burrito. [code]I've pulled these out successfully and each one traces in the debugger, although as I need them all in the same list I'm struggling to establish them as a dataprovider together.If I push the strings and arrays together it is impossible to read properly, as the main Titles are at a different level to any descriptors for the products which are in the arrays.
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Jul 14, 2010
Does anybody know how to add custom rolloveridicatorskins to a flex 3 list component?it doesn't have the rolloveridicatorskin in the css.
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May 6, 2010
I'm using a custom component CheckBoxList DataGrid (http://blogs.adobe.com/aharui/2008/02/checkbox_selection_in_datagrid.html) and as dataProvider I have an ArrayCollection with items such this one:
name="item name" selected="true"
I would like the CheckBox list updated when the selected attribute is set to false or true in the data model.
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Feb 2, 2010
i have following xml
<?xml version="1.0" encoding="UTF-8" ?>
<Users>
<User>
<ID>SMSUser(63)</ID>
[CODE]...
How can i show Email in textbox when user select any item in the grid?
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