tmf/org.eclipse.tracecompass.tmf.ui/src/org/eclipse/tracecompass/tmf/ui/viewers/xycharts/TmfMouseDragZoomProvider.java

   1 /**********************************************************************
   2  * Copyright (c) 2013, 2014 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  *   Bernd Hufmann - Initial API and implementation
  11  **********************************************************************/
  12 package org.eclipse.tracecompass.tmf.ui.viewers.xycharts;
  13
  14 import org.eclipse.swt.SWT;
  15 import org.eclipse.swt.events.MouseEvent;
  16 import org.eclipse.swt.events.MouseListener;
  17 import org.eclipse.swt.events.MouseMoveListener;
  18 import org.eclipse.swt.events.PaintEvent;
  19 import org.swtchart.IAxis;
  20 import org.swtchart.ICustomPaintListener;
  21 import org.swtchart.IPlotArea;
  22
  23 /**
  24  * Class for providing zooming based on mouse drag with right mouse button.
  25  * It also notifies the viewer about a change of range.
  26  *
  27  * @author Bernd Hufmann
  28  */
  29 public class TmfMouseDragZoomProvider extends TmfBaseProvider implements MouseListener, MouseMoveListener, ICustomPaintListener {
  30
  31     // ------------------------------------------------------------------------
  32     // Attributes
  33     // ------------------------------------------------------------------------
  34     /** Cached start time */
  35     private long fStartTime;
  36     /** Cached end time */
  37     private long fEndTime;
  38     /** Flag indicating that an update is ongoing */
  39     private boolean fIsUpdate;
  40
  41     // ------------------------------------------------------------------------
  42     // Constructors
  43     // ------------------------------------------------------------------------
  44     /**
  45      * Default constructor
  46      *
  47      * @param tmfChartViewer
  48      *          the chart viewer reference.
  49      */
  50     public TmfMouseDragZoomProvider(ITmfChartTimeProvider tmfChartViewer) {
  51         super(tmfChartViewer);
  52         register();
  53     }
  54
  55     // ------------------------------------------------------------------------
  56     // TmfBaseProvider
  57     // ------------------------------------------------------------------------
  58     @Override
  59     public void register() {
  60         getChart().getPlotArea().addMouseListener(this);
  61         getChart().getPlotArea().addMouseMoveListener(this);
  62         ((IPlotArea) getChart().getPlotArea()).addCustomPaintListener(this);
  63     }
  64
  65     @Override
  66     public void deregister() {
  67         if ((getChartViewer().getControl() != null) && !getChartViewer().getControl().isDisposed()) {
  68             getChart().getPlotArea().removeMouseListener(this);
  69             getChart().getPlotArea().removeMouseMoveListener(this);
  70             ((IPlotArea) getChart().getPlotArea()).removeCustomPaintListener(this);
  71         }
  72     }
  73
  74     @Override
  75     public void refresh() {
  76         // nothing to do
  77     }
  78
  79     // ------------------------------------------------------------------------
  80     // MouseListener
  81     // ------------------------------------------------------------------------
  82     @Override
  83     public void mouseDoubleClick(MouseEvent e) {
  84     }
  85
  86     @Override
  87     public void mouseDown(MouseEvent e) {
  88         if ((getChartViewer().getWindowDuration() != 0) && (e.button == 3)) {
  89             IAxis xAxis = getChart().getAxisSet().getXAxis(0);
  90             fStartTime = limitXDataCoordinate(xAxis.getDataCoordinate(e.x));
  91             fEndTime = fStartTime;
  92             fIsUpdate = true;
  93         }
  94     }
  95
  96     @Override
  97     public void mouseUp(MouseEvent e) {
  98         if ((fIsUpdate) && (fStartTime != fEndTime)) {
  99             if (fStartTime > fEndTime) {
 100                 long tmp = fStartTime;
 101                 fStartTime = fEndTime;
 102                 fEndTime = tmp;
 103             }
 104             ITmfChartTimeProvider viewer = getChartViewer();
 105             viewer.updateWindow(fStartTime + viewer.getTimeOffset(), fEndTime + viewer.getTimeOffset());
 106         }
 107
 108         if (fIsUpdate) {
 109             getChart().redraw();
 110         }
 111         fIsUpdate = false;
 112     }
 113
 114     // ------------------------------------------------------------------------
 115     // MouseMoveListener
 116     // ------------------------------------------------------------------------
 117     @Override
 118     public void mouseMove(MouseEvent e) {
 119         if (fIsUpdate) {
 120             IAxis xAxis = getChart().getAxisSet().getXAxis(0);
 121             fEndTime = limitXDataCoordinate(xAxis.getDataCoordinate(e.x));
 122             getChart().redraw();
 123         }
 124     }
 125
 126     // ------------------------------------------------------------------------
 127     // ICustomPaintListener
 128     // ------------------------------------------------------------------------
 129     @Override
 130     public void paintControl(PaintEvent e) {
 131         if (fIsUpdate && (fStartTime != fEndTime)) {
 132             IAxis xAxis = getChart().getAxisSet().getXAxis(0);
 133             int startX = xAxis.getPixelCoordinate(fStartTime);
 134             int endX = xAxis.getPixelCoordinate(fEndTime);
 135
 136             e.gc.setBackground(TmfXYChartViewer.getDisplay().getSystemColor(SWT.COLOR_TITLE_INACTIVE_BACKGROUND));
 137             if (fStartTime < fEndTime) {
 138                 e.gc.fillRectangle(startX, 0, endX - startX, e.height);
 139             } else {
 140                 e.gc.fillRectangle(endX, 0, startX - endX, e.height);
 141             }
 142             e.gc.drawLine(startX, 0, startX, e.height);
 143             e.gc.drawLine(endX, 0, endX, e.height);
 144         }
 145     }
 146
 147     @Override
 148     public boolean drawBehindSeries() {
 149         return true;
 150     }
 151 }