or even better:
private function separatorMouseDragHandler(event:GridEvent):void {
const headerGroup:GridColumnHeaderGroup = event.currentTarget as
GridColumnHeaderGroup;
if (headerGroup.dataGrid.columnsLength > 1 && event.columnIndex <
event.grid.columns.length -1) {
dragging = true;
}
}
private static const BOUND_LIMIT:int = 5;
private function separatorMouseUpHandler(event:GridEvent):void {
if (dragging) {
dragging = false;
const columnIndex:int = event.columnIndex;
const headerGroup:GridColumnHeaderGroup = event.currentTarget
as GridColumnHeaderGroup;
const grid:Grid = event.grid;
const visibleColumnIndices:Vector.<int> =
grid.getVisibleColumnIndices();
const isVisible:Boolean =
visibleColumnIndices.indexOf(columnIndex) > -1;
if (visibleColumnIndices.length >= columnIndex + 1 &&
isVisible) {
const dimensions:GridDimensions =
grid.mx_internal::gridDimensions;
const visibleColumnsWidthBeforeOur:Number =
dimensions.getContentWidth(columnIndex);
const visibleColumnsWidthUpToOur:Number =
dimensions.getContentWidth(columnIndex + 1);
if (visibleColumnsWidthUpToOur + BOUND_LIMIT > grid.width) {
const newWidth:Number = grid.width -
visibleColumnsWidthBeforeOur - BOUND_LIMIT;
event.column.width = newWidth;
}
}
}
}
Note: I used const instead of var because I was doing java today but there's no
differences in AS3, they are compiled in the same bytecode.
Frédéric THOMAS
> From: [email protected]
> To: [email protected]
> Subject: RE: Spark datagrid Issue.
> Date: Sat, 7 Jun 2014 15:02:19 +0100
>
> Hi Saju,
>
> I guess this topic would fit better in the user mailing list, hower, not sure
> I understood your question, anyway I assumed you meant drag (instead of
> scroll) the header because in a Spark DataGrid, the header is not drag-able,
> so, to restrict the size of the header to make at least one other column
> header to stay visible, I would do something like this:
>
> <?xml version="1.0" encoding="utf-8"?>
> <s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009";
> xmlns:s="library://ns.adobe.com/flex/spark"
> xmlns:mx="library://ns.adobe.com/flex/mx"
> initialize="initData()">
> <fx:Script>
> <![CDATA[
> import mx.collections.*;
> import mx.events.FlexEvent;
>
> import spark.components.Grid;
>
> import spark.components.GridColumnHeaderGroup;
> import spark.components.gridClasses.GridDimensions;
>
> import spark.events.GridEvent;
>
> import mx.core.mx_internal;
>
> private var dgArray:Array = [
> {Artist: 'Pavement', Album: 'Slanted and Enchanted', Price:
> 11.99},
> {Artist: 'Pavement', Album: 'Brighten the Corners', Price: 11.99}
> ];
> [Bindable]
> public var initDG:ArrayCollection;
> private var dragging:Boolean;
> // Initialize initDG variable from the Array.
> public function initData():void {
> initDG = new ArrayCollection(dgArray);
> }
>
> private function myGrid_creationCompleteHandler(event:FlexEvent):void
> {
> var dg:DataGrid = event.currentTarget as DataGrid;
> dg.removeEventListener(FlexEvent.CREATION_COMPLETE,
> myGrid_creationCompleteHandler);
>
>
> dg.columnHeaderGroup.addEventListener(GridEvent.SEPARATOR_MOUSE_DRAG,
> separatorMouseDragHandler);
>
> dg.columnHeaderGroup.addEventListener(GridEvent.SEPARATOR_MOUSE_UP,
> separatorMouseUpHandler);
> }
>
> private function separatorMouseDragHandler(event:GridEvent):void {
> const headerGroup:GridColumnHeaderGroup = event.currentTarget as
> GridColumnHeaderGroup;
> if (headerGroup.dataGrid.columnsLength > 1) {
> dragging = true;
> }
> }
>
> private static const BOUND_SPACE:int = 5;
>
> private function separatorMouseUpHandler(event:GridEvent):void {
> if (dragging) {
> dragging = false;
> const columnIndex:int = event.columnIndex;
> const headerGroup:GridColumnHeaderGroup = event.currentTarget
> as GridColumnHeaderGroup;
> const grid:Grid = event.grid;
> const visibleColumnIndices:Vector.<int> =
> grid.getVisibleColumnIndices();
> const isVisible:Boolean =
> visibleColumnIndices.indexOf(columnIndex) > -1;
> if (visibleColumnIndices.length >= columnIndex + 1 &&
> isVisible) {
> const visibleColumnsWidthBeforeOur:Number =
> grid.mx_internal::gridDimensions.getContentWidth(columnIndex);
> const visibleColumnsWidthUpToOur:Number =
> grid.mx_internal::gridDimensions.getContentWidth(columnIndex + 1);
> if (visibleColumnsWidthUpToOur + BOUND_SPACE >
> grid.width) {
> const newWidth:Number = visibleColumnsWidthUpToOur -
> visibleColumnsWidthBeforeOur - BOUND_SPACE;
> event.column.width = newWidth;
> }
> }
> }
> }
> ]]>
> </fx:Script>
> <s:DataGrid id="myGrid"
> width="350" height="200"
> dataProvider="{initDG}"
> horizontalScrollPolicy="off"
> creationComplete="myGrid_creationCompleteHandler(event)"/>
> </s:WindowedApplication>
>
> HTH,
> Frédéric THOMAS
>
> > Date: Sat, 7 Jun 2014 16:23:16 +0530
> > Subject: Fwd: Spark datagrid Issue.
> > From: [email protected]
> > To: [email protected]
> >
> > Any help in this regard..
> >
> > --
> > Saju Thankathurai
> >
> > Sent from my Samsung Galaxy Ace.
> > ---------- Forwarded message ----------
> > From: "Saju Thankathurai" <[email protected]>
> > Date: 7 Jun 2014 08:06
> > Subject: Spark datagrid Issue.
> > To: "[email protected]" <[email protected]>
> >
> > Hi,
> >
> > I have a spark flex datagrid. I have set its horizontalscrollpolicy to off.
> > When i scroll the header towards right completely, the header is moved and
> > is not visible. This makes an impression that there are no more columns in
> > the grid.
> >
> > Is there a way to restrict the columns to a certain limit towards right
> > when scrolling
> >
> > Grid has 3 columns
> > [1].
> > https://drive.google.com/file/d/0ByEkeIgKzyCaOXlVaDJ0ckhHLWM/edit?usp=sharing
> >
> >
> > After scrolling the 2nd column towards right, It makes an impression that
> > there is only one column available.
> > [2]
> > https://drive.google.com/file/d/0ByEkeIgKzyCaUkR4WV91cDE1Y0E/edit?usp=sharing
> >
> > Code:
> >
> > <?xml version="1.0" encoding="utf-8"?>
> > <s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009";
> > xmlns:s="library://ns.adobe.com/flex/spark"
> > xmlns:mx="library://ns.adobe.com/flex/mx"
> > initialize="initData()">
> > <fx:Script>
> > <![CDATA[
> > import mx.collections.*;
> > private var dgArray:Array = [
> > {Artist:'Pavement', Album:'Slanted and Enchanted', Price:11.99},
> > {Artist:'Pavement', Album:'Brighten the Corners', Price:11.99}];
> > [Bindable]
> > public var initDG:ArrayCollection;
> > // Initialize initDG variable from the Array.
> > public function initData():void {
> > initDG = new ArrayCollection(dgArray);
> > }
> > ]]>
> > </fx:Script>
> > <s:DataGrid id="myGrid"
> > width="350" height="200"
> > dataProvider="{initDG}"
> > horizontalScrollPolicy="off"/>
> > </s:WindowedApplication>
> >
> >
> >
> > --
> >
> > Regards
> > Saju Thankathurai,
>
