org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/internal/lttng/ui/views/latency/listeners/TimePointerListener.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 display interface implementation
  13  *******************************************************************************/
  14 package org.eclipse.linuxtools.internal.lttng.ui.views.latency.listeners;
  15
  16 import org.eclipse.linuxtools.internal.lttng.ui.views.latency.AbstractViewer;
  17
  18 /**
  19  * <b><u>TimePointerListener</u></b>
  20  * <p>
  21  * Displays a tooltip showing the approximate values of the point under the mouse cursor.
  22  *
  23  * @author Philippe Sawicki
  24  */
  25 public class TimePointerListener extends AbstractMouseTrackListener {
  26
  27     // ------------------------------------------------------------------------
  28     // Attributes
  29     // ------------------------------------------------------------------------
  30
  31     /**
  32      * A reference to the observed view.
  33      */
  34     protected AbstractViewer fView;
  35
  36     /**
  37      * A reference to the HistogramPaintListener.
  38      */
  39     protected GraphPaintListener fGraph;
  40
  41     // ------------------------------------------------------------------------
  42     // Constructors
  43     // ------------------------------------------------------------------------
  44
  45     /**
  46      * Constructor.
  47      * @param view
  48      *            A reference to the observed view.
  49      * @param histogramPaintListener
  50      *            A reference to the histogram's paintListener.
  51      */
  52     public TimePointerListener(AbstractViewer view, GraphPaintListener graphPaintListener) {
  53         fView = view;
  54         fGraph = graphPaintListener;
  55     }
  56
  57     // ------------------------------------------------------------------------
  58     // Operations
  59     // ------------------------------------------------------------------------
  60
  61     /*
  62      * (non-Javadoc)
  63      * @see org.eclipse.linuxtools.lttng.ui.views.latency.listeners.AbstractMouseTrackListener#display()
  64      */
  65     @Override
  66     protected void display() {
  67         fView.setToolTipText(fGraph.formatToolTipLabel(fMouseX, fMouseY));
  68     }
  69 }