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
hideHover();
			return;
		}
		
		if (control == null) {
			return;
		}
		
		if (hover == null) {
			hover = new Hover(hoverNear.getShell());
		}
		hover.setText(text, getDecorationRectangle(control.getParent()),
				control);
		hover.setVisible(true);
	}
	/*
	 * Remove any listeners installed on the controls.
	 */
	private void removeControlListeners() {
		if (control == null) {
			return;
		}
		printRemoveListener(control, "FOCUS"); 
		control.removeFocusListener(focusListener);
		focusListener = null;
		printRemoveListener(control, "DISPOSE"); 
		control.removeDisposeListener(disposeListener);
		disposeListener = null;
		Composite c = control.getParent();
		while (c != null) {