/*******************************************************************************
* Copyright (c) 2010-2015 Henshin developers. 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:
* TU Berlin, University of Luxembourg, SES S.A.
*******************************************************************************/
package de.tub.tfs.muvitor.gef.palette;
import org.eclipse.gef.EditPartViewer;
import org.eclipse.gef.Tool;
import org.eclipse.gef.tools.ConnectionCreationTool;
/**
* This {@link Tool} allows to create connections (e.g. node mappings) between
* edit parts of two different {@link EditPartViewer}s. It will not get in the
* "invalid" state if the mouse leaves the current viewer as does the normal
* {@link ConnectionCreationTool}.
*/
public class MappingCreationTool extends ConnectionCreationTool {
public MappingCreationTool() {
super();
}
/**
* Overwritten to prevent the tool to get in invalid state if we focus on
* another viewer.
*
* @see org.eclipse.gef.tools.ConnectionCreationTool#handleFocusLost()
*/
@Override
protected boolean handleFocusLost() {
return false;
}
/**
* Overwritten to allow moving in another viewer and nevertheless continue
* updating the tool.
*
* @see org.eclipse.gef.tools.AbstractConnectionCreationTool#handleMove()
*/
@Override
protected boolean handleMove() {
if (isInState(STATE_CONNECTION_STARTED | STATE_INITIAL | STATE_ACCESSIBLE_DRAG_IN_PROGRESS)) {
updateTargetRequest();
updateTargetUnderMouse();
showSourceFeedback();
showTargetFeedback();
setCurrentCommand(getCommand());
}
return true;
}
}