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/*******************************************************************************
* Copyright (c) 2011, 2018 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.gef.EditPart;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.commands.UnexecutableCommand;
import org.eclipse.gmf.runtime.diagram.ui.editparts.CompartmentEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.sirius.diagram.ui.edit.api.part.AbstractBorderedDiagramElementEditPart;
import org.eclipse.sirius.diagram.ui.tools.internal.util.EditPartQuery;
import org.eclipse.sirius.viewpoint.DSemanticDecorator;
/**
* A specific dragEditPartTracket that disable the clone feature. Indeed, in Sirius it's not natural to clone a
* graphical element that will be removed on the next refresh.
*
* @author <a href="mailto:laurent.redor@obeo.fr">Laurent Redor</a>
*
*/
public class NoCopyDragEditPartsTrackerEx extends SnapToAllDragEditPartsTracker {
/**
* Default constructor.
*
* @param sourceEditPart
* the source edit part
*/
public NoCopyDragEditPartsTrackerEx(EditPart sourceEditPart) {
super(sourceEditPart);
}
/**
* Always disable the clone with Ctrl key in Sirius because it only clone the graphical element and not the semantic
* element.
*
* @param cloneActive
* true if cloning should be active (never considered here)
* @see org.eclipse.gef.tools.DragEditPartsTracker#setCloneActive(boolean)
*/
@Override
protected void setCloneActive(boolean cloneActive) {
super.setCloneActive(false);
}
@Override
protected void reveal(EditPart editpart) {
// In Sirius, the drag'n'drop can change (delete and create a new
// one) the previous container of the drag'n'droped element. In this
// case, the reveal causes a NPE because the hierarchy of edit part is
// broken.
if (editpart.getRoot() != null) {
super.reveal(editpart);
}
}
/**
* Overridden to return a command only if we are not in case of a drag'n'drop of a node/container outside of its
* current container.
*
* @return A command only if authorized
*/
@Override
protected Command getCommand() {
if (isAuthorized()) {
return super.getCommand();
}
return UnexecutableCommand.INSTANCE;
}
@Override
protected void updateAutoexposeHelper() {
// The updateAutoexposeHelper is not called if the drag'n'drop is not
// authorized because:
// * There is no reason to scroll the diagram
// * It causes a strange effect and the forbidden icon disappears.
if (isAuthorized()) {
super.updateAutoexposeHelper();
}
}
/**
* @return true if the drag'n'drop is authorized (according to layouting mode specificity), false otherwise.
*/
private boolean isAuthorized() {
boolean isAuthorized = true;
EditPart movedEditPart = getSourceEditPart();
if (movedEditPart instanceof AbstractBorderedDiagramElementEditPart) {
EditPartQuery editPartQuery = new EditPartQuery((IGraphicalEditPart) movedEditPart);
if (editPartQuery.isInShowingMode() || editPartQuery.isInLayoutingMode()) {
// We are in layouting mode
EditPart targetEditPart = getTargetEditPart();
// Check if the target container is not the same as before move
boolean notSameContainer = targetEditPart != null
&& !(movedEditPart.getParent() == targetEditPart || targetEditPart instanceof CompartmentEditPart && targetEditPart.getParent() == movedEditPart.getParent());
notSameContainer = notSameContainer && (targetEditPart instanceof IGraphicalEditPart && ((IGraphicalEditPart) targetEditPart).resolveSemanticElement() instanceof DSemanticDecorator);
if (notSameContainer) {
isAuthorized = false;
}
}
}
return isAuthorized;
}
@Override
protected boolean handleButtonUp(int button) {
// The above code is copied from the super classes (SnapToAllDragEditPartsTracker, DragEditPartsTracker and
// SelectEditPartTracker) to disable the reveal.
boolean result = false;
if (stateTransition(STATE_DRAG_IN_PROGRESS, STATE_TERMINAL)) {
eraseSourceFeedback();
eraseTargetFeedback();
performDrag();
result = true;
} else if (isInState(STATE_DRAG)) {
performSelection();
if (getFlag(org.eclipse.gef.tools.SelectEditPartTracker.MAX_FLAG))
// SelectEditPartTracker.MAX_FLAG is a protected constant equals to
// SelectEditPartTracker.FLAG_ENABLE_DIRECT_EDIT (that must be originally used here).
performDirectEdit();
// The SelectEditPartTracker behavior is overridden here to never reveal the selected element.
// if (button == 1 && getSourceEditPart().getSelected() != EditPart.SELECTED_NONE)
// getCurrentViewer().reveal(getSourceEditPart());
setState(STATE_TERMINAL);
result = true;
}
// Clean up the mode to original state.
snapToAllShape = SnapToAllDragEditPartsTracker.DEFAULT_SNAP_TO_SHAPE_MODE;
return result;
}
}
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