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/*******************************************************************************
* Copyright (c) 2015, 2017 THALES GLOBAL SERVICES.
* 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:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.sirius.diagram.ui.tools.internal.ui;
import org.eclipse.draw2d.FigureCanvas;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.gef.ConnectionEditPart;
import org.eclipse.gef.EditPartViewer;
import org.eclipse.gef.Request;
import org.eclipse.gef.SharedCursors;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.requests.BendpointRequest;
import org.eclipse.sirius.diagram.ui.graphical.edit.policies.MoveEdgeGroupManager;
import org.eclipse.sirius.ext.gmf.runtime.diagram.ui.tools.MoveInDiagramDragTracker;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.graphics.Cursor;
/**
* A specific Sirius tracker to handle the move edge group feature.
*
* @author Florian Barbin
*
*/
@SuppressWarnings("restriction")
public class SiriusSelectConnectionEditPartTracker extends SelectConnectionEditPartTracker implements MoveInDiagramDragTracker {
private boolean moveGroupActivated;
/**
* The getSourceRequest method is private so we need to keep the reference in the createSourceRequest method.
*/
private BendpointRequest bendpointRequest;
private Point previousMouseLocation;
/**
* Method SelectConnectionEditPartTracker.
*
* @param owner
* ConnectionNodeEditPart that creates and owns the tracker object
*/
public SiriusSelectConnectionEditPartTracker(ConnectionEditPart owner) {
super(owner);
setDisabledCursor(SharedCursors.NO);
}
@Override
protected Request createSourceRequest() {
Request rq = super.createSourceRequest();
if (rq instanceof BendpointRequest) {
bendpointRequest = (BendpointRequest) rq;
}
return rq;
}
@Override
protected void updateSourceRequest() {
super.updateSourceRequest();
if (bendpointRequest != null) {
if (moveGroupActivated) {
bendpointRequest.getExtendedData().put(MoveEdgeGroupManager.EDGE_MOVE_DELTA, computeDelta());
bendpointRequest.getExtendedData().put(MoveEdgeGroupManager.EDGE_GROUP_MOVE_KEY, Boolean.TRUE);
bendpointRequest.getExtendedData().put(MoveEdgeGroupManager.EDGE_GROUP_MOVE_HAS_BEEN_ACTIVATED_KEY, Boolean.TRUE);
} else {
bendpointRequest.getExtendedData().remove(MoveEdgeGroupManager.EDGE_MOVE_DELTA);
bendpointRequest.getExtendedData().put(MoveEdgeGroupManager.EDGE_GROUP_MOVE_KEY, Boolean.FALSE);
}
}
}
@Override
public void deactivate() {
super.deactivate();
// We also set our field to null.
bendpointRequest = null;
}
private Dimension computeDelta() {
Point newLocation = bendpointRequest.getLocation();
Dimension diff;
if (newLocation != null) {
diff = newLocation.getDifference(getStartLocation());
} else {
diff = getDragMoveDelta();
}
return diff;
}
@Override
protected boolean handleKeyDown(KeyEvent e) {
if (SWT.F3 == e.keyCode) {
moveGroupActivated = true;
return true;
}
return super.handleKeyDown(e);
}
@Override
protected boolean handleKeyUp(KeyEvent e) {
if (SWT.F3 == e.keyCode) {
moveGroupActivated = false;
return true;
}
return super.handleKeyUp(e);
}
@Override
protected Cursor calculateCursor() {
Cursor cursorToReturn;
if (moveGroupActivated) {
Command command = getCurrentCommand();
if (command == null || !command.canExecute()) {
cursorToReturn = getDisabledCursor();
} else {
cursorToReturn = SharedCursors.ARROW;
}
} else {
cursorToReturn = super.calculateCursor();
}
return cursorToReturn;
}
@Override
protected boolean handleButtonDown(int button) {
if (button == 2) {
setCursor(SharedCursors.HAND);
return stateTransition(STATE_INITIAL, STATE_SCROLL_DIAGRAM);
} else {
return super.handleButtonDown(button);
}
}
@Override
public void mouseDrag(MouseEvent me, EditPartViewer viewer) {
previousMouseLocation = getCurrentInput().getMouseLocation().getCopy();
super.mouseDrag(me, viewer);
}
@Override
protected boolean handleDragStarted() {
if (isInState(STATE_SCROLL_DIAGRAM)) {
return stateTransition(STATE_SCROLL_DIAGRAM, STATE_SCROLL_DIAGRAM_IN_PROGRESS);
}
return super.handleDragStarted();
}
@Override
protected boolean handleDragInProgress() {
if (isInState(STATE_SCROLL_DIAGRAM_IN_PROGRESS)) {
if (getCurrentViewer().getControl() instanceof FigureCanvas) {
FigureCanvas figureCanvas = (FigureCanvas) getCurrentViewer().getControl();
Point currentMouseLocation = getCurrentInput().getMouseLocation();
Dimension difference = previousMouseLocation.getDifference(currentMouseLocation);
Point location = figureCanvas.getViewport().getViewLocation();
figureCanvas.scrollTo(location.x + difference.width, location.y + difference.height);
}
return true;
}
return super.handleDragInProgress();
}
}
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