Flex DataGrid Header Column Separator - actionscript-3

Question

I'm using an mx:DataGrid (in a Halo theme) and I'm having some issues with the header column separators/vertical grid line colors. Does anyone know how to customize/change the line color?
Thanks!
--Moe

Answer 1

Datagrid has two styles horizontalSeparatorSkin and verticalSeparatorSkin style which you can override. It seems you need to override the later.
<mx:DataGrid id="grid" verticalGridLines="true" verticalSeparatorSkin="{VerticalSeparatorSkin}">
<mx:columns>
<mx:DataGridColumn dataField="lbl" />
<mx:DataGridColumn dataField="val"/>
</mx:columns>
</mx:DataGrid>
Now you can write this class as:
public class VerticalSeparatorSkin extends ProgrammaticSkin
{
public function VerticalSeparatorSkin()
{
super();
}
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
{
// draw a line at the bottom of the rectangle defined by
// unscaledWidth and unscaledHeight
var g:Graphics = this.graphics;
g.clear();
g.lineStyle(3, 0x00FF00); // change thickness / color here
g.moveTo(0,unscaledWidth);
g.lineTo(unscaledWidth, unscaledHeight);
}
}
This should do the work. Another option is to customize the datagrid itself.
public class MyCustomGrid extends DataGrid
{
public function MyCustomGrid()
{
super();
}
override protected function drawVerticalLine(s:Sprite, colIndex:int, color:uint, x:Number):void
{
var contentHolder:ListBaseContentHolder = s.parent.parent as ListBaseContentHolder;
var g:Graphics = s.graphics;
g.lineStyle(3, color); // change the thickness here
g.moveTo(x, 0);
g.lineTo(x, contentHolder.height);
}
}
And this can be used then in place of regular DataGrid.