Yeah, dropdowns get destroyed and re-created under certain cicurmstances so you can't just modify the dropdown once and expect it to live forever
From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of wwwpl Sent: Thursday, August 28, 2008 1:21 PM To: [email protected] Subject: [flexcoders] Re: ComboBox Disable Drop Down Items There is a weird thing happening here. Maybe someone could explain it. I changed back to having a disabledFunction variable instead of having the function in this class. I am trying to set the disabledFunction like this: var dropDown:DisabledItemList = DisabledItemList (collectionCombo.dropdown); dropDown.disabledFunction = disabledCollectionItem; It sets it but then in the DisabledItemList the disabledFunction turns to null. Is this because it is a factory? I know I am setting this function on a sub component of ComboBox and that it isn't the best way, but it should work. --- In [email protected]<mailto:flexcoders%40yahoogroups.com>, "wwwpl" <[EMAIL PROTECTED]> wrote: > > I got it working. I have to set the selectedIndex in the combo box > as well as in the list for it to work. This isn't ideal, but it > works for the most part. I have had to change a bit of the code to > handle situations. > > --- In [email protected]<mailto:flexcoders%40yahoogroups.com>, Alex > Harui <aharui@> wrote: > > > > Hmm. The combobox is handling keystrokes and forwarding to the > List. It might be messing things up. > > > > From: [email protected]<mailto:flexcoders%40yahoogroups.com> > [mailto:[email protected]<mailto:flexcoders%40yahoogroups.com>] On > Behalf Of wwwpl > > Sent: Thursday, August 28, 2008 10:31 AM > > To: [email protected]<mailto:flexcoders%40yahoogroups.com> > > Subject: [flexcoders] Re: ComboBox Disable Drop Down Items > > > > > > I set caret to false. Now the outline doesn't show, but it should > > jump to the next enabled item. The selection disappears, but I know > > the selection is on the disabled item. In the finishKeySelection > > function, it sets the selectedIndex to the next enabled item, but it > > seems the combobox is not accepting that. Of course it works if you > > just have a list box. > > > > --- In > > [email protected]<mailto:flexcoders%40yahoogroups.com><mailto:flexcoders% > 40yahoogroups.com>, Alex Harui <aharui@> wrote: > > > > > > Try forcing caret to false when calling super > > > > > > From: > > > [email protected]<mailto:flexcoders%40yahoogroups.com><mailto:flexcoders% > 40yahoogroups.com> > > [mailto:[email protected]<mailto:flexcoders%40yahoogroups.com><mailto:flexcoders% > 40yahoogroups.com>] On Behalf Of wwwpl > > > Sent: Thursday, August 28, 2008 9:49 AM > > > To: > > > [email protected]<mailto:flexcoders%40yahoogroups.com><mailto:flexcoders% > 40yahoogroups.com> > > > Subject: [flexcoders] ComboBox Disable Drop Down Items > > > > > > > > > I am trying to disable ComboBox drop down items. I found an > example > > > on Alex's site for disabling items in a List so I took that and > set > > > it as the DropDownFactory in the combo box. But it doesn't work > > > completely. I can still key down and get an outline of the > disabled > > > item. I am curious why this example works in a list but not in a > > > combo box. Here is my code: > > > > > > Application File > > > >>>>>>>>>>>>>>>>>>>>>>>>>>> > > > <?xml version="1.0" encoding="utf-8"?> > > > <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; > > > xmlns:local="*" layout="absolute"> > > > <mx:Script> > > > <![CDATA[ > > > > > > [Bindable] > > > public var dp:Array = [ > > > { label: "Category (17)" }, > > > { label: " Alpha (0)" }, > > > { label: " Beta" }, > > > { label: "Category (0)" }, > > > { label: " Delta" }, > > > { label: " Gamma" }, > > > { label: " Epsilon" } > > > ]; > > > > > > private function noCollections(data:Object):Boolean > > > { > > > if (data.label.indexOf("(0)") != -1) > > > return true; > > > return false; > > > } > > > > > > ]]> > > > </mx:Script> > > > <mx:ComboBox dropdownFactory="DisabledItemsList" > > dataProvider="{dp}"/> > > > <local:DisabledItemsList dataProvider="{dp}"/> > > > </mx:Application> > > > > > > DisabledItemsList.as > > > >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> > > > > > > package > > > { > > > import flash.events.MouseEvent; > > > import flash.ui.Keyboard; > > > > > > import mx.controls.List; > > > import mx.controls.listClasses.IListItemRenderer; > > > > > > /** > > > * A List that uses a disableFunction to determine if an item can > be > > > selected or not > > > */ > > > public class DisabledItemsList extends List > > > { > > > public function DisabledItemsList() > > > { > > > super(); > > > } > > > > > > private function disabledFunction(data:Object):Boolean > > > { > > > if (data.label.indexOf("(0)") != -1) > > > return true; > > > return false; > > > } > > > > > > /** > > > * The function to apply that determines if the item > > > is "disabled" or not. > > > * Takes one argument, which is the data item > > > * Returns true if item cannot be selected. > > > */ > > > // public var disabledFunction:Function; > > > > > > override protected function drawItem(item:IListItemRenderer, > > > selected:Boolean=false, highlighted:Boolean=false, > > > caret:Boolean=false, transition:Boolean=false):void > > > { > > > if(disabledFunction(item.data)) > > > { > > > item.enabled = false; > > > selected = false; > > > highlighted = false; > > > } > > > super.drawItem(item, selected, highlighted, caret, transition); > > > } > > > > > > override protected function mouseEventToItemRenderer > > > (event:MouseEvent):IListItemRenderer > > > { > > > var listItem:IListItemRenderer = > > > super.mouseEventToItemRenderer(event); > > > if (listItem) > > > { > > > if (listItem.data) > > > { > > > if (disabledFunction(listItem.data)) > > > { > > > return null; > > > } > > > } > > > } > > > return listItem; > > > } > > > > > > private var selectionUpward:Boolean; > > > > > > override protected function moveSelectionVertically(code:uint, > > > shiftKey:Boolean, > > > ctrlKey:Boolean):void > > > { > > > if (code == Keyboard.DOWN) > > > selectionUpward = false; > > > else > > > selectionUpward = true; > > > super.moveSelectionVertically(code, shiftKey, > > > ctrlKey); > > > } > > > > > > override protected function finishKeySelection():void > > > { > > > super.finishKeySelection(); > > > > > > var i:int; > > > var uid:String; > > > var rowCount:int = listItems.length; > > > var partialRow:int = (rowInfo[rowCount-1].y + rowInfo > > > [rowCount-1].height > > > > listContent.height) ? 1 : 0; > > > > > > var listItem:IListItemRenderer; > > > listItem = listItems[caretIndex - verticalScrollPosition][0]; > > > if (listItem) > > > { > > > if (listItem.data); > > > { > > > if (disabledFunction(listItem.data)) > > > { > > > // find another visible item > > > that is enabled > > > // assumes there is one that > > > is fully visible > > > rowCount = rowCount - > > > partialRow; > > > var idx:int = caretIndex - > > > verticalScrollPosition; > > > if (selectionUpward) > > > { > > > // look up; > > > for (i = idx - 1; i > > > >= 0; i--) > > > { > > > listItem = > > > listItems[i][0]; > > > if (! > > > disabledFunction(listItem.data)) > > > { > > > > > > selectedIndex = i - verticalScrollPosition; > > > > > > return; > > > } > > > } > > > for (i = idx + 1; i < > > > rowCount; i++) > > > { > > > listItem = > > > listItems[i][0]; > > > if (! > > > disabledFunction(listItem.data)) > > > { > > > > > > selectedIndex = i - verticalScrollPosition; > > > > > > return; > > > } > > > } > > > } > > > else > > > { > > > // look down; > > > for (i = idx + 1; i < > > > rowCount; i++) > > > { > > > listItem = > > > listItems[i][0]; > > > if (! > > > disabledFunction(listItem.data)) > > > { > > > > > > selectedIndex = i - verticalScrollPosition; > > > > > > return; > > > } > > > } > > > for (i = idx - 1; i > > > >= 0; i--) > > > { > > > listItem = > > > listItems[i][0]; > > > if (! > > > disabledFunction(listItem.data)) > > > { > > > > > > selectedIndex = i - verticalScrollPosition; > > > > > > return; > > > } > > > } > > > } > > > } > > > } > > > } > > > } > > > } > > > > > > } > > > > > >
