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/*******************************************************************************
* Copyright (c) 2009 Red Hat, Inc.
* 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:
* Red Hat - initial API and implementation
*******************************************************************************/
package org.eclipse.linuxtools.callgraph.graphlisteners;
import org.eclipse.linuxtools.callgraph.StapGraph;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseWheelListener;
/**
* Allows the user to zoom when CTRL + mouse wheel is used
*
*/
public class StapGraphMouseWheelListener implements MouseWheelListener {
// private long snapshot;
private StapGraph graph;
public StapGraphMouseWheelListener(StapGraph g) {
this.graph = g;
}
@Override
public void mouseScrolled(MouseEvent e) {
if (e.stateMask != SWT.CTRL) {
// Scrolling
if (e.count > 0) {
AutoScrollHelper.scrollUp(graph);
}
else {
AutoScrollHelper.scrollDown(graph);
}
return;
}
if (graph.getDrawMode() != StapGraph.CONSTANT_DRAWMODE_LEVEL &&
graph.getDrawMode() != StapGraph.CONSTANT_DRAWMODE_TREE)
return;
if (e.count <= 0) {
if (graph.scale < 2){
graph.scale /= (10.0 / 11.0);
}else{
graph.scale = (int)graph.scale + 1;
}
}else {
if (graph.scale <= 2){
graph.scale *= (10.0 / 11.0);
}else{
graph.scale = (int) graph.scale - 1;
}
}
int currentAnimationMode = graph.getAnimationMode();
graph.draw(graph.getDrawMode(), StapGraph.CONSTANT_ANIMATION_FASTEST,
graph.getRootVisibleNodeNumber());
graph.setAnimationMode(currentAnimationMode);
int realeX = 3 * (int)(e.x / graph.scale);
int realeY = 3 * (int)(e.y / graph.scale);
int xDiff = (realeX - graph.getSize().x);
int yDiff = (realeY - graph.getSize().y);
graph.scrollTo(realeX + xDiff, realeY - yDiff);
// x = graph.getNode(graph.getRootVisibleNode()).getLocation().x - x;
// y = graph.getNode(graph.getRootVisibleNode()).getLocation().y - y;
// graph.scrollBy(x/3, y);
// graph.moveAllNodesBy(graph.getBounds().width/2 - e.x, graph.getBounds().height/2 - e.y);
// System.out.println("AFTER: " + graph.getNode(graph.getRootVisibleNode()).getLocation().x + ", " +graph.getNode(graph.getRootVisibleNode()).getLocation().y + "\n\n") ;
// // Don't scroll for circle mode
// if (graph.getDrawMode() == StapGraph.CONSTANT_DRAWMODE_CIRCLE)
// return;
//
// // Scrolling
// if (e.count > 0) {
//
// long tempSnapshot = System.currentTimeMillis();
// if (tempSnapshot - snapshot < 100)
// return;
// snapshot = tempSnapshot;
//
// // Scrolling up
// if (graph.getBottomLevelToDraw() < graph.getLowestLevelOfNodesAdded()
// - StapGraph.CONSTANT_LEVEL_BUFFER / 2)
// graph.addLevelToTop();
//
// graph.decreaseTopLevelOnScreen();
// if (graph.getTopLevelOnScreen() < 0) {
// graph.setTopLevelOnScreen(0);
// }
//
// graph
// .scrollToY(graph.getNode(
// graph.getLevel(graph.getTopLevelOnScreen()).get(0))
// .getLocation().y);
// graph.update();
//
// }
//
// else {
//
// long tempSnapshot = System.currentTimeMillis();
//
// if (tempSnapshot - snapshot < 100)
// return;
// snapshot = tempSnapshot;
//
// // Don't delete levels yet
// if (graph.getTopLevelOnScreen() > StapGraph.CONSTANT_LEVEL_BUFFER / 4)
// graph.addLevelToBottom();
//
// graph.incrementTopLevelOnScreen();
// if (graph.getTopLevelOnScreen() < 0) {
// graph.setTopLevelOnScreen(0);
// }
//
// graph
// .scrollToY(graph.getNode(
// graph.getLevel(graph.getTopLevelOnScreen()).get(0))
// .getLocation().y);
// graph.update();
//
// }
}
};
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