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