/*
* The MIT License (MIT)
*
* Copyright (c) 2007-2015 Broad Institute
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
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package org.broad.igv.ui.panel;
//~--- non-JDK imports --------------------------------------------------------
import org.apache.commons.math.stat.StatUtils;
import org.broad.igv.ui.AbstractDataPanelTool;
import org.broad.igv.ui.IGV;
import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
/**
*
*/
public class PanTool extends AbstractDataPanelTool {
private static int throttleTimeMS = 50;
private static double [] repaintTimes = new double[100];
private static int repaintTimeCount = 0;
private int previousYDirection = 0; // Drag Directions: 1=up, 0=none 0r -1=down
//private int lastMousePressedY;
private int cumulativeDeltaX;
private int cumulativeDeltaY;
private Point lastMousePoint;
//private JViewport viewport;
private JScrollBar verticalScrollBar;
private boolean isDragging = false;
private Cursor dragCursor;
private long lastDragEventTime = 0;
private ReferenceFrame referenceFrame;
public PanTool(DataPanel owner) {
super(owner, Cursor.getDefaultCursor());
this.dragCursor = IGV.fistCursor;
setName("Pan");
if (owner != null) {
verticalScrollBar = owner.getVerticalScrollbar();
Container parentContainer = owner.getParent();
if (parentContainer != null) {
Container parentOfParent = parentContainer.getParent();
if ((parentOfParent != null) && (parentOfParent instanceof JViewport)) {
//viewport = (JViewport) parentOfParent;
}
}
}
}
@Override
public Cursor getCursor() {
return isDragging ? dragCursor : Cursor.getDefaultCursor();
}
public Point getLastMousePoint() {
return lastMousePoint;
}
@Override
public void mousePressed(final MouseEvent e) {
if (e.isPopupTrigger()) {
return;
}
lastMousePoint = e.getPoint();
cumulativeDeltaX = 0;
cumulativeDeltaY = 0;
}
public void setReferenceFrame(ReferenceFrame frame) {
this.referenceFrame = frame;
}
@Override
public ReferenceFrame getReferenceFame() {
if (referenceFrame != null) {
return referenceFrame;
}
return super.getReferenceFame();
}
public void mouseReleased(final MouseEvent e) {
if (isDragging) {
isDragging = false;
lastDragEventTime = 0;
getReferenceFame().dragStopped();
}
Component panel = (Component) e.getSource();
panel.setCursor(getCursor());
}
@Override
final public void mouseDragged(final MouseEvent e) {
long currentTime = System.currentTimeMillis();
if ((currentTime - lastDragEventTime) < throttleTimeMS) {
return;
}
//System.out.println("T=" + ctr);
lastDragEventTime = currentTime;
try {
Component panel = (Component) e.getSource();
panel.setCursor(dragCursor);
if (lastMousePoint == null) {
lastMousePoint = e.getPoint();
return;
}
if (!isDragging && e.getPoint().distance(lastMousePoint) < 2) {
return;
} else {
isDragging = true;
int deltaX = lastMousePoint.x - e.getX();
int deltaY = lastMousePoint.y - e.getY();
cumulativeDeltaX += Math.abs(deltaX);
cumulativeDeltaY += Math.abs(deltaY);
// Test for horizontal vs vertical panning.
if (cumulativeDeltaX > cumulativeDeltaY) {
// Horizontal scrolling
getReferenceFame().shiftOriginPixels(deltaX);
} else {
// Vertical Scrolling
int totalYChange = (int) (lastMousePoint.getY() - e.getY());
if (totalYChange != 0) {
// This section handles false drag direction changes
int currentYDirection = 0;
// Figure out the current drag direction
currentYDirection = totalYChange / Math.abs(totalYChange);
// If the previous direction is 0 we were not moving before
if (previousYDirection != 0) {
// See if we changed direction
boolean changedYDirection = currentYDirection != previousYDirection;
if (!changedYDirection) {
// Don't save lastMousePressedPoint because may
// be incorrect (this is the problem we are
// solving with the direction flag) instead
// we'll just check the next drag Point to be
// sure of the correct direction.
previousYDirection = currentYDirection;
// If we have a vertical scrollbar use it to move
if (verticalScrollBar != null) {
int adjustedScrollbarValue = verticalScrollBar.getValue();
adjustedScrollbarValue += totalYChange;
verticalScrollBar.setValue(adjustedScrollbarValue);
}
}
}
previousYDirection = currentYDirection;
}
}
}
} finally {
lastMousePoint = e.getPoint(); // Always save the last Point
}
}
/**
* Adaptively throttle the drag time based on repaint times. Its pointless to drag faster than we can repaint.
*
* @param t
*/
public static void repaintTime(double t) {
repaintTimes[repaintTimeCount++] = t;
if (repaintTimeCount == repaintTimes.length) {
double p = StatUtils.percentile(repaintTimes, 95);
throttleTimeMS = Math.max(5, Math.min(200, (int) p));
repaintTimeCount = 0;
}
}
}