org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/internal/lttng/ui/views/latency/listeners/AbstractMouseTrackListener.java

   1 /*******************************************************************************
   2  * Copyright (c) 2010, 2011 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  * Philippe Sawicki (INF4990.A2010@gmail.com) - Initial API and implementation
  11  * Mathieu Denis (mathieu.denis55@gmail.com) - Refactored code
  12  * Bernd Hufmann - Changed implemented interface to MouseTraceListener
  13  *******************************************************************************/
  14 package org.eclipse.linuxtools.internal.lttng.ui.views.latency.listeners;
  15
  16 import org.eclipse.swt.events.MouseEvent;
  17 import org.eclipse.swt.events.MouseTrackListener;
  18
  19 /**
  20  *  <b><u>AbstractMouseListener</u></b>
  21  * <p>
  22  * AbstractMouseListener, base class for the canvas mouse listener.
  23  *
  24  * @author Philippe Sawicki
  25  */
  26 public abstract class AbstractMouseTrackListener implements MouseTrackListener {
  27
  28     // ------------------------------------------------------------------------
  29     // Attributes
  30     // ------------------------------------------------------------------------
  31
  32     /**
  33      * Mouse x-coordinate.
  34      */
  35     protected int fMouseX;
  36     /**
  37      * Mouse y-coordinate.
  38      */
  39     protected int fMouseY;
  40
  41     // ------------------------------------------------------------------------
  42     // Operations
  43     // ------------------------------------------------------------------------
  44
  45     /*
  46      * (non-Javadoc)
  47      * @see org.eclipse.swt.events.MouseTrackListener#mouseEnter(org.eclipse.swt.events.MouseEvent)
  48      */
  49     @Override
  50     public void mouseEnter(MouseEvent event) {
  51     }
  52
  53     /*
  54      * (non-Javadoc)
  55      * @see org.eclipse.swt.events.MouseTrackListener#mouseExit(org.eclipse.swt.events.MouseEvent)
  56      */
  57     @Override
  58     public void mouseExit(MouseEvent event) {
  59     }
  60
  61     /*
  62      * (non-Javadoc)
  63      * @see org.eclipse.swt.events.MouseTrackListener#mouseHover(org.eclipse.swt.events.MouseEvent)
  64      */
  65     @Override
  66     public void mouseHover(MouseEvent event) {
  67         fMouseX = event.x;
  68         fMouseY = event.y;
  69         display();
  70     }
  71
  72     /**
  73      * Tooltip display callback.
  74      */
  75     protected abstract void display();
  76
  77 }