org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/histogram/TimeRangeHistogram.java

   1 /*******************************************************************************
   2  * Copyright (c) 2011, 2013 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  *   Francois Chouinard - Initial API and implementation
  11  *   Bernd Hufmann - Changed to updated histogram data model
  12  *   Francois Chouinard - Moved from LTTng to TMF
  13  *   Patrick Tasse - Update for mouse wheel zoom
  14  *******************************************************************************/
  15
  16 package org.eclipse.linuxtools.tmf.ui.views.histogram;
  17
  18 import org.eclipse.swt.widgets.Composite;
  19
  20 /**
  21  * A basic histogram widget that displays the event distribution of a specific time range of a trace.
  22  * It has the following additional features:
  23  * <ul>
  24  * <li>zoom in: mouse wheel up (or forward)
  25  * <li>zoom out: mouse wheel down (or backward)
  26  * </ul>
  27  *
  28  * @version 1.1
  29  * @author Francois Chouinard
  30  */
  31 public class TimeRangeHistogram extends Histogram {
  32
  33     // ------------------------------------------------------------------------
  34     // Attributes
  35     // ------------------------------------------------------------------------
  36
  37     private HistogramZoom fZoom = null;
  38
  39     // ------------------------------------------------------------------------
  40     // Constructor
  41     // ------------------------------------------------------------------------
  42     /**
  43      * Constructor
  44      * @param view The parent histogram view
  45      * @param parent The parent composite
  46      */
  47     public TimeRangeHistogram(HistogramView view, Composite parent) {
  48         super(view, parent);
  49         fZoom = new HistogramZoom(this, getStartTime(), getTimeLimit());
  50         addMouseWheelListener(fZoom);
  51     }
  52
  53     // ------------------------------------------------------------------------
  54     // Operations
  55     // ------------------------------------------------------------------------
  56
  57     @Override
  58     public void updateTimeRange(long startTime, long endTime) {
  59         ((HistogramView) fParentView).updateTimeRange(startTime, endTime);
  60     }
  61
  62     @Override
  63     public synchronized void clear() {
  64         if (fZoom != null) {
  65             fZoom.setFullRange(0L, 0L);
  66             fZoom.setNewRange(0L, 0L);
  67         }
  68         super.clear();
  69     }
  70
  71     /**
  72      * Sets the time range of the histogram
  73      * @param startTime The start time
  74      * @param duration The duration of the time range
  75      */
  76     public synchronized void setTimeRange(long startTime, long duration) {
  77         fZoom.setNewRange(startTime, duration);
  78         if (getDataModel().getNbEvents() == 0) {
  79             getDataModel().setTimeRange(startTime, startTime + duration);
  80         }
  81     }
  82
  83     /**
  84      * Sets the full time range of the whole trace.
  85      * @param startTime The start time
  86      * @param endTime The end time
  87      */
  88     public void setFullRange(long startTime, long endTime) {
  89         long currentFirstEvent = getStartTime();
  90         fZoom.setFullRange((currentFirstEvent == 0) ? startTime : currentFirstEvent, endTime);
  91     }
  92
  93 }