org.eclipse.tracecompass.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/viewers/xycharts/TmfMouseSelectionProvider.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.linuxtools.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 selection of ranges with the left mouse button.
  25  * It also notifies the viewer about a change of selection.
  26  *
  27  * @author Bernd Hufmann
  28  * @since 3.0
  29  */
  30 public class TmfMouseSelectionProvider extends TmfBaseProvider implements MouseListener, MouseMoveListener, ICustomPaintListener {
  31
  32     // ------------------------------------------------------------------------
  33     // Attributes
  34     // ------------------------------------------------------------------------
  35     /** Cached start time */
  36     private long fBeginTime;
  37     /** Cached end time */
  38     private long fEndTime;
  39     /** Flag indicating that an update is ongoing */
  40     private boolean fIsInternalUpdate;
  41
  42     // ------------------------------------------------------------------------
  43     // Constructors
  44     // ------------------------------------------------------------------------
  45     /**
  46      * Default constructor
  47      *
  48      * @param tmfChartViewer
  49      *          The chart viewer reference.
  50      */
  51     public TmfMouseSelectionProvider(ITmfChartTimeProvider tmfChartViewer) {
  52         super(tmfChartViewer);
  53         register();
  54     }
  55
  56     // ------------------------------------------------------------------------
  57     // TmfBaseProvider
  58     // ------------------------------------------------------------------------
  59     @Override
  60     public void register() {
  61         getChart().getPlotArea().addMouseListener(this);
  62         getChart().getPlotArea().addMouseMoveListener(this);
  63         ((IPlotArea) getChart().getPlotArea()).addCustomPaintListener(this);
  64     }
  65
  66     @Override
  67     public void deregister() {
  68         if ((getChartViewer().getControl() != null) && !getChartViewer().getControl().isDisposed()) {
  69             getChart().getPlotArea().removeMouseListener(this);
  70             getChart().getPlotArea().removeMouseMoveListener(this);
  71             ((IPlotArea) getChart().getPlotArea()).removeCustomPaintListener(this);
  72         }
  73     }
  74
  75     // ------------------------------------------------------------------------
  76     // MouseListener
  77     // ------------------------------------------------------------------------
  78     @Override
  79     public void mouseDoubleClick(MouseEvent e) {
  80     }
  81
  82     @Override
  83     public void mouseDown(MouseEvent e) {
  84         if ((getChartViewer().getWindowDuration() != 0) && (e.button == 1)) {
  85             IAxis xAxis = getChart().getAxisSet().getXAxis(0);
  86             fBeginTime = limitXDataCoordinate(xAxis.getDataCoordinate(e.x));
  87             fEndTime = fBeginTime;
  88             fIsInternalUpdate = true;
  89         }
  90     }
  91
  92     @Override
  93     public void mouseUp(MouseEvent e) {
  94         if (fIsInternalUpdate) {
  95             if (fBeginTime > fEndTime) {
  96                 // Swap time
  97                 long tmp = fBeginTime;
  98                 fBeginTime = fEndTime;
  99                 fEndTime = tmp;
 100             }
 101             ITmfChartTimeProvider viewer = getChartViewer();
 102             viewer.updateSelectionRange(fBeginTime + viewer.getTimeOffset(), fEndTime + viewer.getTimeOffset());
 103             fIsInternalUpdate = false;
 104             getChart().redraw();
 105         }
 106     }
 107
 108     // ------------------------------------------------------------------------
 109     // MouseMoveListener
 110     // ------------------------------------------------------------------------
 111     @Override
 112     public void mouseMove(MouseEvent e) {
 113         if (fIsInternalUpdate) {
 114             IAxis xAxis = getChart().getAxisSet().getXAxis(0);
 115             fEndTime = limitXDataCoordinate(xAxis.getDataCoordinate(e.x));
 116             getChart().redraw();
 117         }
 118     }
 119
 120     // ------------------------------------------------------------------------
 121     // ICustomPaintListener
 122     // ------------------------------------------------------------------------
 123     @Override
 124     public void paintControl(PaintEvent e) {
 125         ITmfChartTimeProvider viewer = getChartViewer();
 126
 127         if (!fIsInternalUpdate) {
 128             fBeginTime = viewer.getSelectionBeginTime() - viewer.getTimeOffset();
 129             fEndTime = viewer.getSelectionEndTime() - viewer.getTimeOffset();
 130         }
 131         long windowStartTime = viewer.getWindowStartTime() - viewer.getTimeOffset();
 132         long windowEndTime = viewer.getWindowEndTime() - viewer.getTimeOffset();
 133
 134         IAxis xAxis = getChart().getAxisSet().getXAxis(0);
 135         e.gc.setBackground(TmfXYChartViewer.getDisplay().getSystemColor(SWT.COLOR_BLUE));
 136         e.gc.setForeground(TmfXYChartViewer.getDisplay().getSystemColor(SWT.COLOR_BLUE));
 137         e.gc.setLineStyle(SWT.LINE_SOLID);
 138         if ((fBeginTime >= windowStartTime) && (fBeginTime <= windowEndTime)) {
 139             int beginX = xAxis.getPixelCoordinate(fBeginTime);
 140             e.gc.drawLine(beginX, 0, beginX, e.height);
 141         }
 142
 143         if ((fEndTime >= windowStartTime) && (fEndTime <= windowEndTime) && (fBeginTime != fEndTime)) {
 144             int endX = xAxis.getPixelCoordinate(fEndTime);
 145             e.gc.drawLine(endX, 0, endX, e.height);
 146         }
 147         e.gc.setAlpha(150);
 148         if (Math.abs(fEndTime - fBeginTime) > 1) {
 149             e.gc.setBackground(TmfXYChartViewer.getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));
 150             int beginX = xAxis.getPixelCoordinate(fBeginTime);
 151             int endX = xAxis.getPixelCoordinate(fEndTime);
 152             if (fEndTime > fBeginTime) {
 153                 e.gc.fillRectangle(beginX + 1, 0, endX - beginX - 1, e.height);
 154             } else {
 155                 e.gc.fillRectangle(endX + 1, 0, beginX - endX - 1, e.height);
 156             }
 157         }
 158     }
 159
 160     @Override
 161     public boolean drawBehindSeries() {
 162         return false;
 163     }
 164 }