Hi,
I have implemented dynamic grouping in advancedDataGrid . I have
extended the AdvancedDataGridRenderer to provide a menu which gives
options like Dynamic Grouping etc.
The problem is that i am able to group the grid dynamically only
once.It is because of these lines of code :
groupingCollection.source = ICollectionView(grid.dataProvider); ---
(1)
//
//
grid.dataProvider = groupingCollection;--(2) (This converts the
dataGrid's dataProvider to IHierarchicalCollectionView type and hence
the second time when i click on another column to group it it gives
this error : TypeError: Error #1034: Type Coercion failed: cannot
convert mx.collections::hierarchicalcollectionv...@272e3d1 to
mx.collections.ArrayCollection.
Any help in this regard would be highly appreciated.
Thanks,
Shishir.
Here is the code for the renderer :
package {
import flash.events.MouseEvent;
import mx.collections.ArrayCollection;
import mx.collections.Grouping;
import mx.collections.GroupingCollection;
import mx.collections.GroupingField;
import mx.collections.ICollectionView;
import mx.containers.HBox;
import mx.containers.TitleWindow;
import mx.controls.*;
import mx.controls.advancedDataGridClasses.AdvancedDataGridColumn;
import
mx.controls.advancedDataGridClasses.AdvancedDataGridHeaderRenderer;
import mx.controls.advancedDataGridClasses.AdvancedDataGridListData;
import mx.events.MenuEvent;
import mx.managers.PopUpManager;
public class MenuHeaderRenderer extends
AdvancedDataGridHeaderRenderer {
public var restore:Button;
public var menuBar:HBox;
public var _gridColumn:AdvancedDataGridColumn;
public var _grid:AdvancedDataGrid;
public var menu:PopUpMenuButton;
public var dataSource:ArrayCollection;
public var menuData:Array = [label: "Group By", data: "Group By"}];
//constructor
public function MenuHeaderRenderer():void
{
super();
this.id="menuHeaderRenderer";
menu = new PopUpMenuButton();
menu.x = 1;
menu.width = 15;
menu.dataProvider=menuData;
menu.toolTip = "";
//subscribe to the events of interest
menu.addEventListener
(MenuEvent.ITEM_CLICK,menuOptionHandler);
addEventListener(MouseEvent.ROLL_OVER,OnMouseRollOver);
}
//gets the associated dataGrid column
private function get gridColumn():AdvancedDataGridColumn{
if(_gridColumn == null){
_gridColumn = data as AdvancedDataGridColumn;
}
return _gridColumn;
}
//gets the associated dataGrid column
private function get grid():AdvancedDataGrid{
if(_grid == null){
_grid = listData.owner as AdvancedDataGrid;
dataSource = ArrayCollection(grid.dataProvider);
}
return _grid;
}
//Event Handlers
//Response to Mouse RollOver event
private function OnMouseRollOver(event:MouseEvent):void{
//control the sortable property of the column
if(event.localX > menu.x + menu.measuredWidth){
if(gridColumn != null){
gridColumn.sortable = true;
}
}
else{
if(gridColumn != null){
gridColumn.sortable = false;
}
}
}
//handle the menu options here
private function menuOptionHandler(event:MenuEvent):void
{
var groupingCollection:GroupingCollection = new GroupingCollection();
var grouping:Grouping = new Grouping();
var groupingField:GroupingField = new GroupingField
(gridColumn.dataField);
grouping.fields = new Array();
///////Error here //////////
groupingCollection.source = ICollectionView
(grid.dataProvider); //Causing problem ---(1)
grouping.fields.push(groupingField);
groupingCollection.grouping = grouping;
groupingCollection.refresh();
grid.dataProvider = groupingCollection; --(2)--
}
override protected function createChildren():void {
super.createChildren();
addChild(menu);
}
override protected function
updateDisplayList(unscaledWidth:Number,unscaledHeight:Number):void {
super.updateDisplayList(unscaledWidth, unscaledHeight);
menu.setActualSize(menu.getExplicitOrMeasuredWidth(),
menu.getExplicitOrMeasuredHeight());
}
}
}
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