The click event is dispatched before the value
* of the component is changed. To identify the row and column that were clicked,
* use the properties of the event object; do not use the selectedIndex
* and selectedItem properties.
click event, the doubleClick event is
* dispatched after the selectedIndex of the component is
* changed.
*
* @eventType fl.events.ListEvent.ITEM_DOUBLE_CLICK
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Event(name="itemDoubleClick", type="fl.events.ListEvent")]
/**
* Dispatched when a different item is selected in the list.
*
* @eventType flash.events.Event.CHANGE
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Event(name="change", type="flash.events.Event")]
/**
* Dispatched when the user scrolls horizontally or vertically.
*
* @eventType fl.events.ScrollEvent.SCROLL
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Event(name="scroll", type="fl.events.ScrollEvent")]
//--------------------------------------
// Styles
//--------------------------------------
/**
* The class that provides the skin for the background of the component.
*
* @default List_skin
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Style(name="skin", type="Class")]
/**
* The class that provides the cell renderer for each item in the component.
*
* @default fl.contols.listClasses.CellRenderer
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Style(name="cellRenderer", type="Class")]
/**
* The alpha value to set the list to when the enabled property is false.
*
* @default null
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Style(name="disabledAlpha", type="Number")]
/**
* The padding that separates the border of the list from its contents, in pixels.
*
* @default null
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
[Style(name="contentPadding", type="Number", format="Length")]
//--------------------------------------
// Class description
//--------------------------------------
/**
* The SelectableList is the base class for all list-based components--for
* example, the List, TileList, DataGrid, and ComboBox components.
* This class provides methods and properties that are used for the
* rendering and layout of rows, and to set scroll bar styles and data
* providers.
*
* Note: This class does not create a component; * it is exposed only so that it can be extended.
* * @see fl.controls.DataGrid * @see fl.controls.List * @see fl.controls.TileList * @see fl.data.DataProvider * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ public class SelectableList extends BaseScrollPane implements IFocusManagerComponent { /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var listHolder:Sprite; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var list:Sprite; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var _dataProvider:DataProvider; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var activeCellRenderers:Array; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var availableCellRenderers:Array; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var renderedItems:Dictionary; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var invalidItems:Dictionary; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var _horizontalScrollPosition:Number; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var _verticalScrollPosition:Number; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var _allowMultipleSelection:Boolean=false; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var _selectable:Boolean=true; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var _selectedIndices:Array; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var caretIndex:int = -1; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var lastCaretIndex:int = -1; /** * @private (protected) * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var preChangeItems:Array; /** * @private */ private var collectionItemImport:SimpleCollectionItem; /** * @private (protected) * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var rendererStyles:Object; /** * @private (protected) * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ protected var updatedRendererStyles:Object; /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ private static var defaultStyles:Object = { skin:"List_skin", cellRenderer:CellRenderer, contentPadding:null, disabledAlpha:null }; /** * @copy fl.core.UIComponent#getStyleDefinition() * * @includeExample ../core/examples/UIComponent.getStyleDefinition.1.as -noswf * * @see fl.core.UIComponent#getStyle() * @see fl.core.UIComponent#setStyle() * @see fl.managers.StyleManager * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ public static function getStyleDefinition():Object { return mergeStyles(defaultStyles, BaseScrollPane.getStyleDefinition()); } /** * @private * Creates the Accessibility class. * This method is called from UIComponent. * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ public static var createAccessibilityImplementation:Function; /** * Creates a new SelectableList instance. * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ public function SelectableList() { super(); activeCellRenderers = [] availableCellRenderers = []; invalidItems = new Dictionary(true); renderedItems = new Dictionary(true); _selectedIndices = []; if (dataProvider == null) { dataProvider = new DataProvider(); } verticalScrollPolicy = ScrollPolicy.AUTO; rendererStyles = {}; updatedRendererStyles = {}; } [Inspectable(defaultValue=true, verbose=1)] /** * @private * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ override public function set enabled(value:Boolean):void { super.enabled = value; list.mouseChildren = _enabled; } /** * Gets or sets the data model of the list of items to be viewed. A data provider * can be shared by multiple list-based components. Changes to the data provider * are immediately available to all components that use it as a data source. * * @default null * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ public function get dataProvider():DataProvider { // return the original data source: return _dataProvider; } [Collection(collectionClass="fl.data.DataProvider", collectionItem="fl.data.SimpleCollectionItem", identifier="item")] /** * @private (setter) * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ public function set dataProvider(value:DataProvider):void { if (_dataProvider != null) { _dataProvider.removeEventListener(DataChangeEvent.DATA_CHANGE,handleDataChange); _dataProvider.removeEventListener(DataChangeEvent.PRE_DATA_CHANGE, onPreChange); } _dataProvider = value; _dataProvider.addEventListener(DataChangeEvent.DATA_CHANGE,handleDataChange,false,0,true); _dataProvider.addEventListener(DataChangeEvent.PRE_DATA_CHANGE,onPreChange,false,0,true); clearSelection(); invalidateList(); } /** * Gets or sets the number of pixels that the list scrolls to the right when the *horizontalScrollPolicy property is set to ScrollPolicy.ON.
*
* @see fl.containers.BaseScrollPane#horizontalScrollPosition
* @see fl.containers.BaseScrollPane#maxVerticalScrollPosition
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
override public function get maxHorizontalScrollPosition():Number {
return _maxHorizontalScrollPosition;
}
/**
* @private
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function set maxHorizontalScrollPosition(value:Number):void {
_maxHorizontalScrollPosition = value;
invalidate(InvalidationType.SIZE);
}
/**
* Gets the number of items in the data provider.
*
* @includeExample examples/SelectableList.length.1.as -noswf
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function get length():uint {
return _dataProvider.length;
}
[Inspectable(defaultValue=false)]
/**
* Gets a Boolean value that indicates whether more than one list item
* can be selected at a time. A value of true indicates that
* multiple selections can be made at one time; a value of false
* indicates that only one item can be selected at one time.
*
* @default false
*
* @includeExample examples/List.allowMultipleSelection.1.as -noswf
*
* @see #selectable
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function get allowMultipleSelection():Boolean {
return _allowMultipleSelection;
}
/**
* @private
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function set allowMultipleSelection(value:Boolean):void {
if (value == _allowMultipleSelection) { return; }
_allowMultipleSelection = value;
if (!value && _selectedIndices.length > 1) {
_selectedIndices = [_selectedIndices.pop()];
invalidate(InvalidationType.DATA);
}
}
/**
* Gets or sets a Boolean value that indicates whether the items in the list
* can be selected. A value of true indicates that the list items
* can be selected; a value of false indicates that they cannot be.
*
* @default true
*
* @see #allowMultipleSelection
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function get selectable():Boolean {
return _selectable;
}
/**
* @private
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function set selectable(value:Boolean):void {
if (value == _selectable) { return; }
if (!value) { selectedIndices = []; }
_selectable = value;
}
/**
* Gets or sets the index of the item that is selected in a single-selection
* list. A single-selection list is a list in which only one item can be selected
* at a time.
*
* A value of -1 indicates that no item is selected; if multiple selections * are made, this value is equal to the index of the item that was selected last in * the group of selected items.
* *When ActionScript is used to set this property, the item at the specified index
* replaces the current selection. When the selection is changed programmatically,
* a change event object is not dispatched.
To replace the current selection programmatically, you can make an
* explicit assignment to this property. You can clear the current selection
* by setting this property to an empty array or to a value of undefined.
* If no items are selected from the list of items, this property is
* undefined.
The sequence of values in the array reflects the order in which the items
* were selected from the multiple-selection list. For example, if you click the second
* item from the list, then the third item, and finally the first item, this property
* contains an array of values in the following sequence: [1,2,0].
If no selection is made, the value of this property is null.
For a single-selection list, the value of this property is an
* array containing the one selected item. In a single-selection
* list, the allowMultipleSelection property is set to
* false.
Note: This property must be overridden in any class that extends SelectableList.
* * @includeExample examples/SelectableList.rowCount.1.as -noswf * * @default 0 * * @langversion 3.0 * @playerversion Flash 9.0.28.0 */ public function get rowCount():uint { return 0; } /** * Clears the currently selected item in the list and sets theselectedIndex property to -1.
*
* @includeExample examples/List.clearSelection.1.as -noswf
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function clearSelection():void {
selectedIndex = -1;
}
/**
* Retrieves the ICellRenderer for a given item object, if there is one.
* This method always returns null.
*
* @param item The item in the data provider.
*
* @return A value of null.
*
* @includeExample examples/SelectableList.itemToCellRenderer.1.as -noswf
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function itemToCellRenderer(item:Object):ICellRenderer {
if(item != null) {
for(var index in activeCellRenderers) {
var renderer:ICellRenderer = activeCellRenderers[index] as ICellRenderer;
if(renderer.data == item) {
return renderer;
}
}
}
return null;
}
/**
* Appends an item to the end of the list of items.
*
* An item should contain label and data
* properties; however, items that contain other properties can also
* be added to the list. By default, the label property of
* an item is used to display the label of the row; the data
* property is used to store the data of the row.
Array.sort() method.
* Note that this method returns 0 when the sortArgs parameter
* is set to Array.UNIQUESORT.
*
* @see #sortItemsOn()
* @see Array#sort()
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function sortItems(...sortArgs:Array):* {
return _dataProvider.sort.apply(_dataProvider,sortArgs);
}
/**
* Sorts the elements of the current data provider by one or more
* of its fields.
*
* @param field The field on which to sort.
* @param options Sort arguments that are used to override the default sort behavior.
* Separate two or more arguments with the bitwise OR (|) operator.
*
* @return The return value depends on whether any parameters are passed to this
* method. For more information, see the Array.sortOn() method.
* Note that this method returns 0 when the sortOption parameter
* is set to Array.UNIQUESORT.
*
* @includeExample examples/SelectableList.sortItemsOn.1.as -noswf
*
* @see #sortItems()
* @see fl.data.DataProvider#sortOn() DataProvider.sortOn()
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function sortItemsOn(field:String,options:Object=null):* {
return _dataProvider.sortOn(field,options);
}
/**
* Checks whether the specified item is selected in the list.
*
* @param item The item to check.
*
* @return This method returns true if the specified item is selected;
* otherwise, if the specified item has a value of null or is not
* included in the list, this method returns false.
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function isItemSelected(item:Object):Boolean {
return selectedItems.indexOf(item) > -1;
}
/**
* Scrolls the list to the item at the location indicated by
* the current value of the selectedIndex property.
*
* @see #selectedIndex
* @see #scrollToIndex()
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function scrollToSelected():void {
scrollToIndex(selectedIndex);
}
/**
* Scrolls the list to the item at the specified index. If the index
* is out of range, the scroll position does not change.
*
* @param newCaretIndex The index location to scroll to.
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function scrollToIndex(newCaretIndex:int):void {
// Handle in subclasses.
}
/**
* Returns the index of the next item in the dataProvider in which
* the label's first character matches a specified string character.
* If the search reaches the end of the dataProvider without searching
* all the items, it will loop back to the start. The search does not
* include the startIndex.
*
* @param firstLetter The string character to search for
* @param startIndex The index in the dataProvider to start at.
*
* @return The index of the next item in the dataProvider.
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function getNextIndexAtLetter(firstLetter:String, startIndex:int=-1):int {
if (length == 0) { return -1; }
firstLetter = firstLetter.toUpperCase();
var l:int = length-1;
for (var i:Number=0; ilabel properties of the object. This method
* is intended to be overwritten in sub-components. For example, List has
* a labelField and a labelFunction to derive the
* label.
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function itemToLabel(item:Object):String {
return item["label"]; // Use bracket access in case object has no property.
}
/**
* Sets a style on the renderers in the list.
*
* @param name The name of the style to be set.
* @param style The value of the style to be set.
*
* @includeExample examples/SelectableList.setRendererStyle.1.as -noswf
* @includeExample examples/SelectableList.setRendererStyle.2.as -noswf
* @includeExample examples/SelectableList.setRendererStyle.3.as -noswf
* @includeExample examples/SelectableList.setRendererStyle.4.as -noswf
*
* @see #clearRendererStyle()
* @see #getRendererStyle()
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function setRendererStyle(name:String, style:Object, column:uint=0):void {
if (rendererStyles[name] == style) { return; }
updatedRendererStyles[name] = style;
rendererStyles[name] = style;
invalidate(InvalidationType.RENDERER_STYLES);
}
/**
* Retrieves a style that is set on the renderers in the list.
*
* @param name The name of the style to be retrieved.
* @param style The value of the style to be retrieved.
*
* @see #clearRendererStyle()
* @see #setRendererStyle()
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function getRendererStyle(name:String, column:int=-1):Object {
return rendererStyles[name];
}
/**
* Clears a style that is set on the renderers in the list.
*
* @param name The name of the style to be cleared.
*
* @see #getRendererStyle()
* @see #setRendererStyle()
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
public function clearRendererStyle(name:String, column:int=-1):void {
delete rendererStyles[name];
updatedRendererStyles[name] = null; // Do not delete, so it can clear the style from current renderers.
invalidate(InvalidationType.RENDERER_STYLES);
}
/**
* @private (protected)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
override protected function configUI():void {
super.configUI();
listHolder = new Sprite();
addChild(listHolder);
listHolder.scrollRect = contentScrollRect;
list = new Sprite();
listHolder.addChild(list);
}
/**
* @private (protected)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function _invalidateList():void {
availableCellRenderers = [];
while (activeCellRenderers.length > 0) {
list.removeChild(activeCellRenderers.pop() as DisplayObject);
}
}
/**
* @private (protected)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function handleDataChange(event:DataChangeEvent):void {
var startIndex:int = event.startIndex;
var endIndex:int = event.endIndex;
var changeType:String = event.changeType;
var i:uint;
if (changeType == DataChangeType.INVALIDATE_ALL) {
clearSelection();
invalidateList();
} else if (changeType == DataChangeType.INVALIDATE) {
for (i = 0; i < event.items.length; i++) {
invalidateItem(event.items[i]);
}
} else if (changeType == DataChangeType.ADD) {
for (i = 0; i<_selectedIndices.length; i++) {
if (_selectedIndices[i] >= startIndex) {
_selectedIndices[i] += startIndex-endIndex;
}
}
} else if (changeType == DataChangeType.REMOVE) {
for (i = 0; i<_selectedIndices.length; i++) {
if (_selectedIndices[i] >= startIndex) {
if (_selectedIndices[i] <= endIndex) {
delete(_selectedIndices[i]);
} else {
_selectedIndices[i] -= startIndex-endIndex+1;
}
}
}
} else if (changeType == DataChangeType.REMOVE_ALL) {
clearSelection();
} else if (changeType == DataChangeType.REPLACE) {
// doesn't need to do anything.
} else {
// Using preChangeItems to remember selection
//clearSelection();
selectedItems = preChangeItems;
preChangeItems = null;
}
invalidate(InvalidationType.DATA);
}
/**
* @private (protected)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function handleCellRendererMouseEvent(event:MouseEvent):void {
var renderer:ICellRenderer = event.target as ICellRenderer;
var evtType:String = (event.type == MouseEvent.ROLL_OVER) ? ListEvent.ITEM_ROLL_OVER : ListEvent.ITEM_ROLL_OUT;
dispatchEvent(new ListEvent(evtType,false,false,renderer.listData.column,renderer.listData.row, renderer.listData.index, renderer.data));
}
/**
* @private (protected)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function handleCellRendererClick(event:MouseEvent):void {
if (!_enabled) { return; }
var renderer:ICellRenderer = event.currentTarget as ICellRenderer;
var itemIndex:uint = renderer.listData.index;
// this event is cancellable:
if (!dispatchEvent(new ListEvent(ListEvent.ITEM_CLICK,false,true,renderer.listData.column,renderer.listData.row,itemIndex,renderer.data)) || !_selectable) { return; }
var selectIndex:int = selectedIndices.indexOf(itemIndex);
var i:int;
if (!_allowMultipleSelection) {
if (selectIndex != -1) {
return;
} else {
renderer.selected = true;
_selectedIndices = [itemIndex];
}
lastCaretIndex = caretIndex = itemIndex;
} else {
if (event.shiftKey) {
var oldIndex:uint = (_selectedIndices.length > 0) ? _selectedIndices[0] : itemIndex;
_selectedIndices = [];
if (oldIndex > itemIndex) {
for (i = oldIndex; i >= itemIndex; i--) {
_selectedIndices.push(i);
}
} else {
for (i = oldIndex; i <= itemIndex; i++) {
_selectedIndices.push(i);
}
}
caretIndex = itemIndex;
} else if (event.ctrlKey) {
if (selectIndex != -1) {
renderer.selected = false;
_selectedIndices.splice(selectIndex,1);
} else {
renderer.selected = true;
_selectedIndices.push(itemIndex);
}
caretIndex = itemIndex;
} else {
_selectedIndices = [itemIndex];
lastCaretIndex = caretIndex = itemIndex;
}
}
dispatchEvent(new Event(Event.CHANGE));
invalidate(InvalidationType.DATA);
}
/**
* @private (protected)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function handleCellRendererChange(event:Event):void {
var renderer:ICellRenderer = event.currentTarget as ICellRenderer;
var itemIndex:uint = renderer.listData.index;
_dataProvider.invalidateItemAt(itemIndex);
}
/**
* @private (protected)
*/
protected function handleCellRendererDoubleClick(event:MouseEvent):void {
if (!_enabled) { return; }
var renderer:ICellRenderer = event.currentTarget as ICellRenderer;
var itemIndex:uint = renderer.listData.index;
dispatchEvent(new ListEvent(ListEvent.ITEM_DOUBLE_CLICK,false,true,renderer.listData.column,renderer.listData.row,itemIndex,renderer.data));
}
/**
* @private (protected)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
override protected function setHorizontalScrollPosition(scroll:Number,fireEvent:Boolean=false):void {
if (scroll == _horizontalScrollPosition) { return; }
var delta:Number = scroll-_horizontalScrollPosition;
_horizontalScrollPosition = scroll;
if (fireEvent) {
dispatchEvent(new ScrollEvent(ScrollBarDirection.HORIZONTAL,delta,scroll));
}
}
/**
* @private (protected)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
override protected function setVerticalScrollPosition(scroll:Number,fireEvent:Boolean=false):void {
if (scroll == _verticalScrollPosition) { return; }
var delta:Number = scroll-_verticalScrollPosition;
_verticalScrollPosition = scroll;
if (fireEvent) {
dispatchEvent(new ScrollEvent(ScrollBarDirection.VERTICAL,delta,scroll));
}
}
/**
* @private (protected)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
override protected function draw():void {
// this method is overridden in List implementations.
super.draw();
}
/**
* @private (protected)
*/
override protected function drawLayout():void {
super.drawLayout();
contentScrollRect = listHolder.scrollRect;
contentScrollRect.width = availableWidth;
contentScrollRect.height = availableHeight;
listHolder.scrollRect = contentScrollRect;
}
/**
* @private (protected)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function updateRendererStyles():void {
var renderers:Array = availableCellRenderers.concat(activeCellRenderers);
var l:uint = renderers.length;
for (var i:uint=0; itrue if the shift key was held down when
* the keyboard key was pressed.
*
* @param ctrlKey true if the ctrl key was held down when
* the keyboard key was pressed
*
*/
protected function moveSelectionHorizontally(code:uint, shiftKey:Boolean, ctrlKey:Boolean):void {}
/**
* @private (protected)
* Moves the selection in a vertical direction in response
* to the user selecting items using the up-arrow or down-arrow
* Keys and modifiers such as the Shift and Ctrl keys.
*
* @param code The key that was pressed (e.g. Keyboard.DOWN)
*
* @param shiftKey true if the shift key was held down when
* the keyboard key was pressed.
*
* @param ctrlKey true if the ctrl key was held down when
* the keyboard key was pressed
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function moveSelectionVertically(code:uint, shiftKey:Boolean, ctrlKey:Boolean):void {}
/**
* @private (protected)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
override protected function initializeAccessibility():void {
if (SelectableList.createAccessibilityImplementation != null) {
SelectableList.createAccessibilityImplementation(this);
}
}
/**
* @private (protected)
*
* @langversion 3.0
* @playerversion Flash 9.0.28.0
*/
protected function onPreChange(event:DataChangeEvent):void {
switch (event.changeType) {
case DataChangeType.REMOVE:
case DataChangeType.ADD:
case DataChangeType.INVALIDATE:
case DataChangeType.REMOVE_ALL:
case DataChangeType.REPLACE:
case DataChangeType.INVALIDATE_ALL:
break;
default:
preChangeItems = selectedItems;
break;
}
}
}
}