projects / deliverable / tracecompass.git / blame
| Commit | Line | Data |
|---|---|---|
| eee2beeb BH |
1 | /********************************************************************** |
| 2 | * Copyright (c) 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.events.MouseEvent; | |
| 15 | import org.eclipse.swt.events.MouseListener; | |
| 16 | import org.eclipse.swt.events.MouseMoveListener; | |
| 17 | import org.swtchart.IAxis; | |
| 18 | import org.swtchart.Range; | |
| 19 | ||
| 20 | /** | |
| 21 | * Class for updating time ranges based on middle mouse button drag. | |
| 22 | * It also notifies the viewer about a change of range. | |
| 23 | * | |
| 24 | * @author Bernd Hufmann | |
| 25 | * @since 3.0 | |
| 26 | */ | |
| 27 | public class TmfMouseDragProvider extends TmfBaseProvider implements MouseListener, MouseMoveListener { | |
| 28 | ||
| 29 | // ------------------------------------------------------------------------ | |
| 30 | // Attributes | |
| 31 | // ------------------------------------------------------------------------ | |
| 32 | /** Cached start time */ | |
| 33 | private long fStartTime; | |
| 34 | /** Cached end time */ | |
| 35 | private long fEndTime; | |
| 36 | /** Flag indicating that an update is ongoing */ | |
| 37 | private boolean fIsUpdate; | |
| 38 | /** Cached position when mouse button was pressed */ | |
| 39 | private int fStartPosition; | |
| 40 | ||
| 41 | // ------------------------------------------------------------------------ | |
| 42 | // Constructors | |
| 43 | // ------------------------------------------------------------------------ | |
| 44 | /** | |
| 45 | * Default constructor | |
| 46 | * | |
| 47 | * @param tmfChartViewer | |
| 48 | * the chart viewer reference. | |
| 49 | */ | |
| 50 | public TmfMouseDragProvider(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 | } | |
| 63 | ||
| 64 | @Override | |
| 65 | public void deregister() { | |
| 66 | if ((getChartViewer().getControl() != null) && !getChartViewer().getControl().isDisposed()) { | |
| 67 | getChart().getPlotArea().removeMouseListener(this); | |
| 68 | getChart().getPlotArea().removeMouseMoveListener(this); | |
| 69 | } | |
| 70 | } | |
| 71 | ||
| 72 | @Override | |
| 73 | public void refresh() { | |
| 74 | // nothing to do | |
| 75 | } | |
| 76 | ||
| 77 | // ------------------------------------------------------------------------ | |
| 78 | // MouseListener | |
| 79 | // ------------------------------------------------------------------------ | |
| 80 | @Override | |
| 81 | public void mouseDoubleClick(MouseEvent e) { | |
| 82 | } | |
| 83 | ||
| 84 | @Override | |
| 85 | public void mouseDown(MouseEvent e) { | |
| 86 | if ((getChartViewer().getWindowDuration() != 0) && (e.button == 2)) { | |
| 87 | fStartPosition = e.x; | |
| 88 | fIsUpdate = true; | |
| 89 | } | |
| 90 | } | |
| 91 | ||
| 92 | @Override | |
| 93 | public void mouseUp(MouseEvent e) { | |
| 94 | if ((fIsUpdate) && (fStartTime != fEndTime)) { | |
| 95 | ITmfChartTimeProvider viewer = getChartViewer(); | |
| 96 | viewer.updateWindow(fStartTime, fEndTime); | |
| 97 | } | |
| 98 | fIsUpdate = false; | |
| 99 | } | |
| 100 | ||
| 101 | // ------------------------------------------------------------------------ | |
| 102 | // MouseMoveListener | |
| 103 | // ------------------------------------------------------------------------ | |
| 104 | @Override | |
| 105 | public void mouseMove(MouseEvent e) { | |
| 106 | if (fIsUpdate) { | |
| 107 | IAxis xAxis = getChart().getAxisSet().getXAxis(0); | |
| 108 | ||
| 109 | ITmfChartTimeProvider viewer = getChartViewer(); | |
| 110 | ||
| 111 | fStartTime = viewer.getWindowStartTime(); | |
| 112 | fEndTime = viewer.getWindowEndTime(); | |
| 113 | ||
| 114 | long startTime = viewer.getStartTime(); | |
| 115 | long endTime = viewer.getEndTime(); | |
| 116 | ||
| 117 | long delta = 0; | |
| 118 | if (fStartPosition > e.x) { | |
| 119 | delta = (long) (xAxis.getDataCoordinate(fStartPosition) - xAxis.getDataCoordinate(e.x)); | |
| 120 | long max = endTime - fEndTime; | |
| 121 | delta = Math.max(0, Math.min(delta, max)); | |
| 122 | fStartTime = fStartTime + delta; | |
| 123 | fEndTime = fEndTime + delta; | |
| 124 | } else if (fStartPosition < e.x) { | |
| 125 | delta = (long) (xAxis.getDataCoordinate(e.x) - xAxis.getDataCoordinate(fStartPosition)); | |
| 126 | long max = fStartTime - startTime; | |
| 127 | delta = Math.max(0, Math.min(delta, max)); | |
| 128 | fStartTime = fStartTime - delta; | |
| 129 | fEndTime = fEndTime - delta; | |
| 130 | } | |
| 131 | ||
| 132 | xAxis.setRange(new Range(fStartTime - viewer.getTimeOffset(), fEndTime - viewer.getTimeOffset())); | |
| 133 | } | |
| 134 | } | |
| 135 | } |