org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/internal/lttng/ui/views/latency/HistogramViewer.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 - Adapted to new model-view-controller design
  13  *******************************************************************************/
  14 package org.eclipse.linuxtools.internal.lttng.ui.views.latency;
  15
  16 import org.eclipse.linuxtools.internal.lttng.ui.views.latency.listeners.HistogramPaintListener;
  17 import org.eclipse.linuxtools.internal.lttng.ui.views.latency.listeners.TooltipListener;
  18 import org.eclipse.linuxtools.internal.lttng.ui.views.latency.listeners.ZoomListener;
  19 import org.eclipse.linuxtools.tmf.ui.views.histogram.HistogramDataModel;
  20 import org.eclipse.linuxtools.tmf.ui.views.histogram.IHistogramDataModel;
  21 import org.eclipse.linuxtools.tmf.ui.views.histogram.IHistogramModelListener;
  22 import org.eclipse.swt.SWT;
  23 import org.eclipse.swt.widgets.Composite;
  24
  25 /**
  26  * <b><u>HistogramViewer</u></b>
  27  * <p>
  28  *
  29  * Histogram viewer.
  30  *
  31  * @author Philippe Sawicki
  32  */
  33 public class HistogramViewer extends AbstractViewer implements IHistogramModelListener {
  34
  35     // ------------------------------------------------------------------------
  36     // Attributes
  37     // ------------------------------------------------------------------------
  38
  39         /**
  40          * Usable width for data plotting.
  41          */
  42         protected int fUsableWidth;
  43
  44         /**
  45          * Latency histogram model.
  46          */
  47         private HistogramDataModel fModel;
  48
  49     // ------------------------------------------------------------------------
  50     // Constructors
  51     // ------------------------------------------------------------------------
  52
  53         /**
  54          * Constructor.
  55          * @param parent The parent composite node.
  56          * @param style The SWT style to use to render the view.
  57          */
  58         public HistogramViewer(Composite parent, int style) {
  59                 super(parent, style);
  60
  61                 // Register the paint listener
  62                 fPaintListener = new HistogramPaintListener(this);
  63                 addPaintListener(fPaintListener);
  64
  65                 // Register the zoom listener
  66                 fZoomListener = new ZoomListener(this);
  67                 addListener(SWT.MouseWheel, fZoomListener);
  68
  69                 // Register the mouse click listener
  70                 fMouseTraceListener = new TooltipListener(this, (HistogramPaintListener)fPaintListener);
  71                 addMouseTrackListener(fMouseTraceListener);
  72
  73                 fModel = new HistogramDataModel();
  74                 fModel.addHistogramListener(this);
  75         }
  76
  77     // ------------------------------------------------------------------------
  78     // Operations
  79     // ------------------------------------------------------------------------
  80
  81         /*
  82          * (non-Javadoc)
  83          * @see org.eclipse.linuxtools.lttng.ui.views.latency.AbstractViewer#dispose()
  84          */
  85         @Override
  86         public void dispose() {
  87             fModel.removeHistogramListener(this);
  88             fPaintListener.dispose();
  89             super.dispose();
  90         }
  91
  92         /*
  93          * (non-Javadoc)
  94          * @see org.eclipse.linuxtools.lttng.ui.views.latency.AbstractViewer#clear()
  95          */
  96         @Override
  97         public void clear() {
  98                 fPaintListener.clear();
  99         }
 100
 101         /*
 102          * (non-Javadoc)
 103          * @see org.eclipse.linuxtools.lttng.ui.views.latency.AbstractViewer#clearBackground()
 104          */
 105         @Override
 106         public void clearBackground() {
 107                 fPaintListener.clear();
 108         }
 109
 110         /*
 111          * (non-Javadoc)
 112          * @see org.eclipse.linuxtools.lttng.ui.views.latency.AbstractViewer#increaseBarWidth()
 113          */
 114         @Override
 115     public void increaseBarWidth() {
 116             fPaintListener.increaseBarWitdh();
 117             modelUpdated();
 118         }
 119
 120         /*
 121          * (non-Javadoc)
 122          * @see org.eclipse.linuxtools.lttng.ui.views.latency.AbstractViewer#decreaseBarWidth()
 123          */
 124         @Override
 125     public void decreaseBarWidth() {
 126             fPaintListener.decreaseBarWitdh();
 127             modelUpdated();
 128         }
 129
 130         /*
 131          * (non-Javadoc)
 132          * @see org.eclipse.linuxtools.lttng.ui.views.latency.AbstractViewer#getModel()
 133          */
 134         @Override
 135     public IHistogramDataModel getModel() {
 136         return fModel;
 137     }
 138
 139         /*
 140          * (non-Javadoc)
 141          * @see org.eclipse.linuxtools.lttng.ui.views.histogram.IHistogramModelListener#modelUpdated()
 142          */
 143     @Override
 144     public void modelUpdated() {
 145
 146         if (!isDisposed() && getDisplay() != null) {
 147             getDisplay().asyncExec(new Runnable() {
 148                 @Override
 149                 public void run() {
 150                     if (!isDisposed()) {
 151                         redraw();
 152                     }
 153                 }
 154             });
 155         }
 156     }
 157 }