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/*******************************************************************************
* Copyright (c) 2011, 2013 Ericsson
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License v1.0 which
* accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Francois Chouinard - Initial API and implementation
* Bernd Hufmann - Changed to updated histogram data model
* Francois Chouinard - Moved from LTTng to TMF
* Patrick Tasse - Update for mouse wheel zoom
*******************************************************************************/
package org.eclipse.linuxtools.tmf.ui.views.histogram;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;
/**
* A basic histogram widget that displays the event distribution of a specific time range of a trace.
* It has the following additional features:
* <ul>
* <li>zoom in: mouse wheel up (or forward)
* <li>zoom out: mouse wheel down (or backward)
* </ul>
*
* @version 1.1
* @author Francois Chouinard
*/
public class TimeRangeHistogram extends Histogram {
// ------------------------------------------------------------------------
// Attributes
// ------------------------------------------------------------------------
private HistogramZoom fZoom = null;
private long fRangeStartTime = 0L;
private long fRangeDuration;
private long fFullRangeStartTime = 0L;
private long fFullRangeEndTime = 0L;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
/**
* Constructor
* @param view The parent histogram view
* @param parent The parent composite
*/
public TimeRangeHistogram(HistogramView view, Composite parent) {
super(view, parent);
fZoom = new HistogramZoom(this, getStartTime(), getTimeLimit());
addMouseWheelListener(fZoom);
}
// ------------------------------------------------------------------------
// Operations
// ------------------------------------------------------------------------
@Override
public synchronized void clear() {
fRangeStartTime = 0L;
fRangeDuration = 0L;
fFullRangeStartTime = 0L;
fFullRangeEndTime = 0L;
if (fZoom != null) {
fZoom.setFullRange(0L, 0L);
fZoom.setNewRange(0L, 0L);
}
super.clear();
}
/**
* Sets the time range of the histogram
* @param startTime The start time
* @param duration The duration of the time range
*/
public synchronized void setTimeRange(long startTime, long duration) {
fRangeStartTime = startTime;
fRangeDuration = duration;
fZoom.setNewRange(startTime, duration);
if (getDataModel().getNbEvents() == 0) {
getDataModel().setTimeRange(startTime, startTime + duration);
getDataModel().setEndTime(startTime + duration);
}
}
/**
* Sets the full time range of the whole trace.
* @param startTime The start time
* @param endTime The end time
*/
public void setFullRange(long startTime, long endTime) {
fFullRangeStartTime = startTime;
fFullRangeEndTime = endTime;
long currentFirstEvent = getStartTime();
fZoom.setFullRange((currentFirstEvent == 0) ? startTime : currentFirstEvent, endTime);
}
// ------------------------------------------------------------------------
// MouseListener
// ------------------------------------------------------------------------
private int fStartPosition;
private int fMinOffset;
private int fMaxOffset;
@Override
public void mouseDown(MouseEvent event) {
if (fDragState == DRAG_NONE && fDataModel.getNbEvents() != 0) {
if (event.button == 2 || (event.button == 1 && (event.stateMask & SWT.MODIFIER_MASK) == SWT.CTRL)) {
fDragState = DRAG_RANGE;
fDragButton = event.button;
fStartPosition = event.x;
fMaxOffset = (int) ((fRangeStartTime - fFullRangeStartTime) / fScaledData.fBucketDuration);
fMinOffset = (int) ((fRangeStartTime + fRangeDuration - fFullRangeEndTime) / fScaledData.fBucketDuration);
return;
} else if (event.button == 3) {
fDragState = DRAG_ZOOM;
fDragButton = event.button;
fRangeStartTime = Math.min(getTimestamp(event.x), getEndTime());
fRangeDuration = 0;
fCanvas.redraw();
return;
}
}
super.mouseDown(event);
}
@Override
public void mouseUp(MouseEvent event) {
if (fDragState == DRAG_RANGE && event.button == fDragButton) {
fDragState = DRAG_NONE;
fDragButton = 0;
if (event.x != fStartPosition) {
int nbBuckets = event.x - fStartPosition;
long delta = nbBuckets * fScaledData.fBucketDuration;
long startTime = fRangeStartTime - delta;
fRangeStartTime = Math.max(fFullRangeStartTime, Math.min(fFullRangeEndTime - fRangeDuration, startTime));
((HistogramView) fParentView).updateTimeRange(fRangeStartTime, fRangeStartTime + fRangeDuration);
setOffset(0);
}
return;
} else if (fDragState == DRAG_ZOOM && event.button == fDragButton) {
fDragState = DRAG_NONE;
fDragButton = 0;
if (fRangeDuration < 0) {
fRangeStartTime = fRangeStartTime + fRangeDuration;
fRangeDuration = -fRangeDuration;
}
if (fRangeDuration > 0) {
((HistogramView) fParentView).updateTimeRange(fRangeStartTime, fRangeStartTime + fRangeDuration);
} else {
fRangeStartTime = fZoom.getStartTime();
fRangeDuration = fZoom.getDuration();
fCanvas.redraw();
}
return;
}
super.mouseUp(event);
}
// ------------------------------------------------------------------------
// MouseMoveListener
// ------------------------------------------------------------------------
@Override
public void mouseMove(MouseEvent event) {
if (fDragState == DRAG_RANGE) {
int offset = Math.max(fMinOffset, Math.min(fMaxOffset, event.x - fStartPosition));
setOffset(offset);
fCanvas.redraw();
return;
} else if (fDragState == DRAG_ZOOM) {
long endTime = Math.max(getStartTime(), Math.min(getEndTime(), getTimestamp(event.x)));
fRangeDuration = endTime - fRangeStartTime;
fCanvas.redraw();
return;
}
super.mouseMove(event);
}
// ------------------------------------------------------------------------
// PaintListener
// ------------------------------------------------------------------------
@Override
public void paintControl(PaintEvent event) {
super.paintControl(event);
if (fDragState == DRAG_ZOOM) {
Image image = (Image) fCanvas.getData(IMAGE_KEY);
assert image != null;
Image rangeRectangleImage = new Image(image.getDevice(), image, SWT.IMAGE_COPY);
GC rangeWindowGC = new GC(rangeRectangleImage);
drawTimeRangeWindow(rangeWindowGC, fRangeStartTime, fRangeDuration);
// Draws the buffer image onto the canvas.
event.gc.drawImage(rangeRectangleImage, 0, 0);
rangeWindowGC.dispose();
rangeRectangleImage.dispose();
}
}
}
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