Bug 279553 [FieldAssist] ControlDecoration strange behavior when description text is empty string
Build ID: 3.5RC3 With the following simple code, when I hover over the control decoration, a huge yellow box quickly flashes on the screen and then disappears. I also tried on 3.4.2 and observed the same behavior. Display display = new Display(); Shell shell = new Shell(display); shell.setLayout(new GridLayout(1, false)); Text t = new Text(shell, SWT.BORDER); t.setText("hover on decoration ->"); ControlDecoration decoration = new ControlDecoration(t, SWT.RIGHT); decoration.setImage(FieldDecorationRegistry.getDefault() .getFieldDecoration(FieldDecorationRegistry.DEC_INFORMATION).getImage()); decoration.setDescriptionText(""); shell.pack(); shell.open(); while (!isInterrupted() && !shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose();
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ControlDecoration.java
Composite c = control.getParent();
		while (c != null) {
			installCompositeListeners(c);
			if (composite != null && composite == c) {
				
				c = null;
			} else if (c instanceof Shell) {
				
				c = null;
			} else {
				c = c.getParent();
			}
		}
		
		
		update();
	}
	/*
	 * Install the listeners used to paint and track mouse events on the
	 * composite.
	 */
	private void installCompositeListeners(Composite c) {
		if (!c.isDisposed()) {
			printAddListener(c, "PAINT"); 
			c.addPaintListener(paintListener);
			printAddListener(c, "MOUSETRACK"); 
			c.addMouseTrackListener(mouseTrackListener);
			printAddListener(c, "SWT.MenuDetect"); 
			c.addListener(SWT.MenuDetect, compositeListener);