Bug 104986 Backgound image uses an absolute path
Currently Chart uses an absolute path to indicate a backgournd image, that may cause the design unusable on other environments. Expected the background image can be definded in multiple ways like in report designer. e.g. URI(absolute path), File(relative path), Embedded Image(Encoded Image Data).
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/composites/MarkerIconDialog.java
private URL convertStringToURL( String path )
	{
		URL url = null;
		try
		{
			url = new URL( path );
		}
		catch ( MalformedURLException ex )
		{
			ex.printStackTrace( );
		}
		return url;
	}
	
	/**
	 * 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 )
		{
			iconPalette = PaletteImpl.create( ImageImpl.create( iconList.getSelection( )[0] ) );
		}
		else
		{
			iconPalette.getEntries( ).add( ImageImpl.create( iconList.getSelection( )[0] ) );
		}
	}