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
{
				getScale( ).eUnset( ComponentPackage.eINSTANCE.getScale_Max( ) );
			}
			else
			{
				DataElement de = getTypedDataElement( txtScaleMax.getText( ) );
				if ( de != null )
				{
					getScale( ).setMax( de );
				}
			}
			setState( );
		}
		else if ( event.widget.equals( txtStepSize ) )
		{
			try
			{
				if ( txtStepSize.getText( ).length( ) == 0 )
				{
					getScale( ).eUnset( ComponentPackage.eINSTANCE.getScale_Step( ) );
				}
				else
				{
					double dbl = Double.valueOf( txtStepSize.getText( ) )
							.doubleValue( );
					if ( dbl == 0 )
					{
						getScale( ).eUnset( ComponentPackage.eINSTANCE.getScale_Step( ) );
					}
					else