/**********************************************************************
* Copyright (c) 2013, 2014 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:
* Bernd Hufmann - Initial API and implementation
**********************************************************************/
package fr.inria.linuxtools.tmf.ui.viewers.xycharts;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.events.MouseMoveListener;
import org.eclipse.swt.events.PaintEvent;
import org.swtchart.IAxis;
import org.swtchart.ICustomPaintListener;
import org.swtchart.IPlotArea;
/**
* Class for providing selection of ranges with the left mouse button.
* It also notifies the viewer about a change of selection.
*
* @author Bernd Hufmann
* @since 3.0
*/
public class TmfMouseSelectionProvider extends TmfBaseProvider implements MouseListener, MouseMoveListener, ICustomPaintListener {
// ------------------------------------------------------------------------
// Attributes
// ------------------------------------------------------------------------
/** Cached start time */
private long fBeginTime;
/** Cached end time */
private long fEndTime;
/** Flag indicating that an update is ongoing */
private boolean fIsInternalUpdate;
// ------------------------------------------------------------------------
// Constructors
// ------------------------------------------------------------------------
/**
* Default constructor
*
* @param tmfChartViewer
* The chart viewer reference.
*/
public TmfMouseSelectionProvider(ITmfChartTimeProvider tmfChartViewer) {
super(tmfChartViewer);
register();
}
// ------------------------------------------------------------------------
// TmfBaseProvider
// ------------------------------------------------------------------------
@Override
public void register() {
getChart().getPlotArea().addMouseListener(this);
getChart().getPlotArea().addMouseMoveListener(this);
((IPlotArea) getChart().getPlotArea()).addCustomPaintListener(this);
}
@Override
public void deregister() {
if ((getChartViewer().getControl() != null) && !getChartViewer().getControl().isDisposed()) {
getChart().getPlotArea().removeMouseListener(this);
getChart().getPlotArea().removeMouseMoveListener(this);
((IPlotArea) getChart().getPlotArea()).removeCustomPaintListener(this);
}
}
// ------------------------------------------------------------------------
// MouseListener
// ------------------------------------------------------------------------
@Override
public void mouseDoubleClick(MouseEvent e) {
}
@Override
public void mouseDown(MouseEvent e) {
if ((getChartViewer().getWindowDuration() != 0) && (e.button == 1)) {
IAxis xAxis = getChart().getAxisSet().getXAxis(0);
fBeginTime = limitXDataCoordinate(xAxis.getDataCoordinate(e.x));
fEndTime = fBeginTime;
fIsInternalUpdate = true;
}
}
@Override
public void mouseUp(MouseEvent e) {
if (fIsInternalUpdate) {
if (fBeginTime > fEndTime) {
// Swap time
long tmp = fBeginTime;
fBeginTime = fEndTime;
fEndTime = tmp;
}
ITmfChartTimeProvider viewer = getChartViewer();
viewer.updateSelectionRange(fBeginTime + viewer.getTimeOffset(), fEndTime + viewer.getTimeOffset());
fIsInternalUpdate = false;
getChart().redraw();
}
}
// ------------------------------------------------------------------------
// MouseMoveListener
// ------------------------------------------------------------------------
@Override
public void mouseMove(MouseEvent e) {
if (fIsInternalUpdate) {
IAxis xAxis = getChart().getAxisSet().getXAxis(0);
fEndTime = limitXDataCoordinate(xAxis.getDataCoordinate(e.x));
getChart().redraw();
}
}
// ------------------------------------------------------------------------
// ICustomPaintListener
// ------------------------------------------------------------------------
@Override
public void paintControl(PaintEvent e) {
ITmfChartTimeProvider viewer = getChartViewer();
if (!fIsInternalUpdate) {
fBeginTime = viewer.getSelectionBeginTime() - viewer.getTimeOffset();
fEndTime = viewer.getSelectionEndTime() - viewer.getTimeOffset();
}
long windowStartTime = viewer.getWindowStartTime() - viewer.getTimeOffset();
long windowEndTime = viewer.getWindowEndTime() - viewer.getTimeOffset();
IAxis xAxis = getChart().getAxisSet().getXAxis(0);
e.gc.setBackground(TmfXYChartViewer.getDisplay().getSystemColor(SWT.COLOR_BLUE));
e.gc.setForeground(TmfXYChartViewer.getDisplay().getSystemColor(SWT.COLOR_BLUE));
e.gc.setLineStyle(SWT.LINE_SOLID);
if ((fBeginTime >= windowStartTime) && (fBeginTime <= windowEndTime)) {
int beginX = xAxis.getPixelCoordinate(fBeginTime);
e.gc.drawLine(beginX, 0, beginX, e.height);
}
if ((fEndTime >= windowStartTime) && (fEndTime <= windowEndTime) && (fBeginTime != fEndTime)) {
int endX = xAxis.getPixelCoordinate(fEndTime);
e.gc.drawLine(endX, 0, endX, e.height);
}
e.gc.setAlpha(150);
if (Math.abs(fEndTime - fBeginTime) > 1) {
e.gc.setBackground(TmfXYChartViewer.getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));
int beginX = xAxis.getPixelCoordinate(fBeginTime);
int endX = xAxis.getPixelCoordinate(fEndTime);
if (fEndTime > fBeginTime) {
e.gc.fillRectangle(beginX + 1, 0, endX - beginX - 1, e.height);
} else {
e.gc.fillRectangle(endX + 1, 0, beginX - endX - 1, e.height);
}
}
}
@Override
public boolean drawBehindSeries() {
return false;
}
}