Bug 172431 [eclipse3.3only]BPS17-4.5 Adding Date picker to input DateTime value for Axis Scale
In Axis Scale dialog, provide a Data picker next to the input box for convenience of inputting DataTime value.
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/wizard/format/popup/AbstractScaleSheet.java
{
		
		setState( true );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
	 */
	public void handleEvent( Event event )
	{
		if ( event.widget.equals( txtScaleMin ) )
		{
			if ( txtScaleMin.getText( ).length( ) == 0 )
			{
				getScale( ).eUnset( ComponentPackage.eINSTANCE.getScale_Min( ) );
			}
			else
			{
				DataElement de = getTypedDataElement( txtScaleMin.getText( ) );
				if ( de != null )
				{
					getScale( ).setMin( de );
				}
			}
			setState( );
		}
		else if ( event.widget.equals( txtScaleMax ) )
		{
			if ( txtScaleMax.getText( ).length( ) == 0 )