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
*/
	private FocusListener focusListener;
	/**
	 * The dispose listener
	 */
	private DisposeListener disposeListener;
	/**
	 * The paint listener installed for drawing the decoration
	 */
	private PaintListener paintListener;
	/**
	 * The mouse listener installed for tracking the hover
	 */
	private MouseTrackListener mouseTrackListener;
	/**
	 * The mouse move listener installed for tracking the hover
	 */
	private MouseMoveListener mouseMoveListener;
	/**
	 * The untyped listener installed for notifying external listeners
	 */
	private Listener compositeListener;
	/**
	 * Control that we last installed a move listener on. We only want one at a
	 * time.
	 */
	private Control moveListeningTarget = null;
	/**
	 * Debug counter used to match add and remove listeners
	 */