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How to set background image for whole nattable [message #1383941]

Tue, 27 May 2014 10:27

jacky gao

Messages: 4
Registered: May 2014

Junior Member

I am a NatTable user.NatTable is great.
Now I have already set background image or color for NatTable cell.But I don't know how to set background image or color for whole NatTable.
Please help me!Many thanks.

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Re: How to set background image for whole nattable [message #1384102 is a reply to message #1383941]

Wed, 28 May 2014 06:33

Dirk Fauth

Messages: 2902
Registered: July 2012

Senior Member

NatTable itself is a Canvas, therefore a Control, which means you can set a background color via

//set the NatTable background white
natTable.setBackground(GUIHelper.COLOR_WHITE);

I also assume that setBackgroundImage(Image) will work.

But if that should be visible in your cells, like getting transparent cell backgrounds, you will need to ensure that there is no background painter involved for cell rendering. For example, you need to configure a TextPainter that doesn't render the background and ensure that there is also no other painter in your configuration that renders the background, as such a painter would simply paint over your control background.

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Re: How to set background image for whole nattable [message #1384115 is a reply to message #1384102]

Wed, 28 May 2014 07:11

Dirk Fauth

Messages: 2902
Registered: July 2012

Senior Member

Just tried and setBackgroundImage() does not work that simply.

So for a different background color you want to use for the whole NatTable, you can try this code:

final NatTable natTable = new NatTable(
	parent, bodyDataLayer, false);
		
natTable.addConfiguration(new DefaultNatTableStyleConfiguration() {
	{
		cellPainter = new TextPainter(false, false);
	}
});
		
natTable.configure();
		
natTable.setBackground(GUIHelper.COLOR_YELLOW);

For the background image you need to set a different NatLayerPainter, as the default one is cleaning up the background by always painting the background color.
In that case this code should help:

final NatTable natTable = new NatTable(
	parent bodyDataLayer, false);
		
natTable.addConfiguration(new DefaultNatTableStyleConfiguration() {
	{
		cellPainter = new TextPainter(false, false);
	}
});		
natTable.configure();
		
natTable.setBackgroundImage(new Image(Display.getCurrent(), "C:\\Daten\\dirk_fauth.jpg"));

natTable.setLayerPainter(new NatLayerPainter(natTable) {
	@Override
	protected void paintBackground(ILayer natLayer, GC gc, int xOffset,
			int yOffset, Rectangle rectangle,
			IConfigRegistry configRegistry) {
		//do nothing to avoid overpainting the background image
	}
});

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Re: How to set background image for whole nattable [message #1384170 is a reply to message #1384115]

Wed, 28 May 2014 10:03

jacky gao

Messages: 4
Registered: May 2014

Junior Member

Thanks for your help,I have already realized to set background image for whole nattable.
My code:

natTable.setLayerPainter(new NatLayerPainter(natTable){
	@Override
	protected void paintBackground(ILayer natLayer, GC gc, int xOffset,int yOffset, Rectangle rectangle,IConfigRegistry configRegistry) {
		super.paintBackground(natLayer, gc, xOffset, yOffset, rectangle, configRegistry);
		String path=editor.report.getBackgroundImage();
		if(path!=null){
			try{
				Image bgImg=Activator.getImage(path, true);
				IPreferenceStore store=Utils.getReportPreferenceStore();
				int width=store.getInt(RowHeaderLayerStack.ROW_HEADER_WIDTH);
				gc.drawImage(bgImg, rectangle.x+width, rectangle.y+DataLayer.DEFAULT_ROW_HEIGHT);						
			}catch(Exception ex){
				ex.printStackTrace();
			}
		}
	}
});

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