Bug 117149 Add additional datapoint markers
I would like to propose adding additional datapoint markers. Attached is a set of markers I would like supported.
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/composites/MarkerIconDialog.java
private void updateButton( )
	{
		btnOK.setEnabled( iconList.getSelectionCount( ) != 0 );
	}
	/**
	 * Preview the image when it is a local image file.
	 * 
	 * @param uri
	 *            Image absolute path without "file:///"
	 */
	private void preview( String uri )
	{
		try
		{
			previewCanvas.loadImage( new URL( uri ) );
		}
		catch ( Exception e )
		{
			WizardBase.displayException( e );
		}
	}
	/**
	 * If there is no palette associated with the marker, create a new palette.
	 * Otherwise, add the icon into the palette.
	 * 
	 */
	private void addIconToPalette( )
	{
		if ( iconPalette == null )
		{