我在 AdvancedDataGrid 中有一个复选框作为 GroupItemrenderer。我在树中选择了某些子节点并关闭了它的父节点，稍后当我重新打开同一个父节点时，选定的子节点不是我选择的那些。如何在复选框中保留正确的选择。 ??
也无法从组件默认设置复选框（GroupItemRenderer）的值，也无法访问数据属性中复选框的值。
package
{
import flash.events.KeyboardEvent;
import flash.events.MouseEvent;
import flash.ui.Keyboard;
import mx.collections.ICollectionView;
import mx.collections.IHierarchicalCollectionView;
import mx.collections.IHierarchicalData;
import mx.collections.IViewCursor;
import mx.controls.AdvancedDataGrid;
import mx.controls.Alert;
import mx.controls.CheckBox;
import mx.controls.Image;
import mx.controls.advancedDataGridClasses.AdvancedDataGridColumn;
import mx.controls.advancedDataGridClasses.AdvancedDataGridGroupItemRenderer;
import mx.controls.advancedDataGridClasses.AdvancedDataGridListData;
import mx.core.FlexGlobals;
import mx.core.mx_internal;
use namespace mx_internal;
public class CheckADGRenderer extends AdvancedDataGridGroupItemRenderer
{
protected var myImage:Image;
public var status:String = "false";
// set image properties
private var imageWidth:Number = 6;
private var imageHeight:Number = 6;
private var inner:String = "inner.png";
protected var myCheckBox:CheckBox;
static private var STATE_SCHRODINGER:String = "schrodinger";
static private var STATE_CHECKED:String = "checked";
static private var STATE_UNCHECKED:String = "unchecked";
public function CheckADGRenderer ()
{
super();
mouseEnabled = false;
}
private function toggleParents(item:Object,adg:AdvancedDataGrid,state:String):void
{
if (item == null)
{
return;
}
else
{
item.@state = false;
toggleParents(adg.getParentItem(item), adg, getState (adg, adg.getParentItem(item)));
}
}
private function toggleChildren (item:Object, adg:AdvancedDataGrid, state:String):void
{
if (item == null)
{
return;
}
else
{
//item.@state = state;
var adgCollection:IHierarchicalCollectionView = adg.dataProvider as IHierarchicalCollectionView;
var adgHD:IHierarchicalData = adgCollection.source;
if (adgHD.hasChildren(item))
{
var children:ICollectionView = adgCollection.getChildren (item);
var cursor:IViewCursor = children.createCursor();
while (!cursor.afterLast)
{
toggleChildren(cursor.current, adg, state);
cursor.moveNext();
}
}
}
}
private function getState(adg:AdvancedDataGrid, parent:Object):String
{
var noChecks:int = 0;
var noCats:int = 0;
var noUnChecks:int = 0;
if (parent != null)
{
var adgCollection:IHierarchicalCollectionView = adg.dataProvider as IHierarchicalCollectionView;
var cursor:IViewCursor = adgCollection.getChildren(parent).createCursor();
}
if ((noChecks > 0 && noUnChecks > 0) || (noCats > 0))
{
return STATE_SCHRODINGER;
}
else if (noChecks > 0)
{
return STATE_CHECKED;
}
else
{
return STATE_UNCHECKED;
}
}
private function imageToggleHandler(event:MouseEvent):void
{
myCheckBox.selected = !myCheckBox.selected;
checkBoxToggleHandler(event);
}
var selectArr:Array = new Array();
private function checkBoxToggleHandler(event:MouseEvent):void
{
if (data)
{
var myListData:AdvancedDataGridListData = AdvancedDataGridListData(this.listData);
var selectedNode:Object = myListData.item;
var adg:AdvancedDataGrid = AdvancedDataGrid(myListData.owner);
var toggle:Boolean = myCheckBox.selected;
if (toggle)
{
toggleChildren(data, adg, STATE_CHECKED);
}
else
{
toggleChildren(data, adg, STATE_UNCHECKED);
}
var parent:Object = adg.getParentItem (data);
toggleParents (parent, adg, getState (adg, parent));
//Alert.show(selectArr.toString()+"\t\t"+selectArr.length+"\t\t"+selectArr[0].length+"\t\t"+adg.selectedIndices.length);
}
}
override protected function createChildren():void
{
super.createChildren();
myCheckBox = new CheckBox();
myCheckBox.setStyle( "verticalAlign", "middle" );
myCheckBox.addEventListener( MouseEvent.CLICK, checkBoxToggleHandler );
addChild(myCheckBox);
}
private function setCheckState (checkBox:CheckBox, value:Object, state:Boolean):void
{
if (state == STATE_CHECKED)
{
checkBox.selected = state;
}
else if (state == STATE_UNCHECKED)
{
checkBox.selected = false;
}
else if (state == STATE_SCHRODINGER)
{
checkBox.selected = false;
}
checkBox.selected = state;
}
override public function set data(value:Object):void
{
super.data = value;
var myListData:AdvancedDataGridListData = AdvancedDataGridListData(this.listData);
//var adg:AdvancedDataGrid = AdvancedDataGrid(myListData.owner);
var selectedNode:Object = myListData.item;
myCheckBox.selected = AdvancedDataGridListData(super.listData).item.show;
//var adg:AdvancedDataGrid = AdvancedDataGrid(myListData.owner);
//setCheckState (myCheckBox, value, Boolean(value.state));
}
override protected function commitProperties():void
{
super.commitProperties();
var dg:AdvancedDataGrid = AdvancedDataGrid(listData.owner);
var column:AdvancedDataGridColumn =
dg.columns[listData.columnIndex];
label.wordWrap = dg.columnWordWrap(column);
}
/**
* @private
*/
override protected function measure():void
{
super.measure();
var w:Number = data ? AdvancedDataGridListData(listData).indent : 0;
if (disclosureIcon)
w += disclosureIcon.width;
if (icon)
w += icon.measuredWidth;
if (myCheckBox)
w += myCheckBox.measuredWidth;
// guarantee that label width isn't zero because it messes up ability to measure
if (label.width < 4 || label.height < 4)
{
label.width = 4;
label.height = 16;
}
if (isNaN(explicitWidth))
{
w += label.getExplicitOrMeasuredWidth();
measuredWidth = w;
}
else
{
label.width = Math.max(explicitWidth - w, 4);
}
measuredHeight = label.getExplicitOrMeasuredHeight();
if (icon && icon.measuredHeight > measuredHeight)
measuredHeight = icon.measuredHeight;
if (myCheckBox && myCheckBox.measuredHeight > measuredHeight)
measuredHeight = myCheckBox.measuredHeight;
}
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
{
super.updateDisplayList(unscaledWidth, unscaledHeight);
if(super.data)
{
if (super.icon != null)
{
myCheckBox.x = super.icon.x;
myCheckBox.y = (unscaledHeight - myCheckBox.height) / 2;
super.icon.x = myCheckBox.x + myCheckBox.width + 17;
if (icon.x + icon.width > unscaledWidth)
icon.setActualSize(0, unscaledHeight);
super.label.x = super.icon.x + super.icon.width + 3;
super.label.setActualSize(Math.max(unscaledWidth - super.label.x, 4), unscaledHeight);
}
else
{
myCheckBox.x = super.label.x;
myCheckBox.y = (unscaledHeight - myCheckBox.height) / 2;
super.label.x = myCheckBox.x + myCheckBox.width + 17;
super.label.setActualSize(Math.max(unscaledWidth - super.label.x, 4), unscaledHeight);
}
if (myCheckBox.x + myCheckBox.width > unscaledWidth)
myCheckBox.visible = false;
}
trace(label.width);
}
}
}
我使用二维数组作为 ADG 的数据提供者。我的帖子： 如何在 Flex 中动态地将属性添加到现有数组中，与上述帖子相关联。