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 int position;
	/**
	 * The decoration's visibility flag
	 */
	private boolean visible = true;
	/**
	 * Boolean indicating whether the decoration should only be shown when the
	 * control has focus
	 */
	private boolean showOnlyOnFocus = false;
	/**
	 * Boolean indicating whether the decoration should show its description
	 * text in a hover when the user hovers over the decoration.
	 */
	private boolean showHover = true;
	/**
	 * Margin width used between the decorator and the control.
	 */
	private int marginWidth = 0;
	/**
	 * Registered selection listeners.
	 */
	private ListenerList selectionListeners = new ListenerList();
	/**
	 * Registered menu detect listeners.
	 */
	private ListenerList menuDetectListeners = new ListenerList();
	/**
	 * The focus listener