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/*******************************************************************************
* Copyright (c) 2010, 2012 THALES GLOBAL SERVICES.
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.sirius.diagram.ui.tools.api.figure;
import org.eclipse.draw2d.Graphics;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.sirius.diagram.DDiagramElement;
import org.eclipse.sirius.diagram.EdgeTarget;
import org.eclipse.sirius.diagram.ui.business.internal.query.EdgeTargetQuery;
import org.eclipse.sirius.diagram.ui.edit.api.part.IAbstractDiagramNodeEditPart;
import org.eclipse.sirius.diagram.ui.provider.DiagramUIPlugin;
import org.eclipse.sirius.diagram.ui.tools.internal.commands.ToggleFoldingStateCommand;
import org.eclipse.sirius.ext.draw2d.figure.ActionTriggerImageFigure;
import org.eclipse.swt.graphics.Image;
import com.google.common.base.Preconditions;
/**
* A figure which displays and controls the folding state of an element.
*
* @author pcdavid
*/
public class FoldingToggleImageFigure extends ActionTriggerImageFigure {
/**
* Width of the images used for the folding toggle.
*/
protected static final int FOLD_ICON_WIDTH = 9;
/**
* Height of the images used for the folding toggle.
*/
protected static final int FOLD_ICON_HEIGHT = FOLD_ICON_WIDTH;
private static final Image MINUS_IMAGE = DiagramUIPlugin.getPlugin().getImage(DiagramUIPlugin.Implementation.getBundledImageDescriptor("/icons/collapse.gif")); //$NON-NLS-1$
private static final Image PLUS_IMAGE = DiagramUIPlugin.getPlugin().getImage(DiagramUIPlugin.Implementation.getBundledImageDescriptor("/icons/expand.gif")); //$NON-NLS-1$
private final IAbstractDiagramNodeEditPart part;
/**
* Constructor.
*
* @param part
* the element whose folding state to display and control.
*/
public FoldingToggleImageFigure(IAbstractDiagramNodeEditPart part) {
this.part = Preconditions.checkNotNull(part);
setSize(new Dimension(FOLD_ICON_WIDTH, FOLD_ICON_HEIGHT));
show(null);
DDiagramElement element = part.resolveDiagramElement();
if (element instanceof EdgeTarget) {
updateImage();
}
}
/**
* {@inheritDoc}
*/
@Override
public void paint(Graphics graphics) {
updateImage();
super.paint(graphics);
}
/**
* {@inheritDoc}
*/
@Override
public void trigger() {
DDiagramElement element = part.resolveDiagramElement();
if (element instanceof EdgeTarget) {
TransactionalEditingDomain domain = part.getEditingDomain();
domain.getCommandStack().execute(new ToggleFoldingStateCommand(domain, part));
updateImage();
}
}
private void updateImage() {
if (part.isActive()) {
DDiagramElement element = part.resolveDiagramElement();
if (element instanceof EdgeTarget) {
EdgeTargetQuery query = new EdgeTargetQuery((EdgeTarget) element);
if (!query.isFoldingPoint()) {
show(null);
} else {
switch (query.getFoldingState()) {
case FOLDED:
show(PLUS_IMAGE);
break;
case UNFOLDED:
case MIXED:
default:
show(MINUS_IMAGE);
break;
}
}
}
}
}
private void show(Image img) {
setImageWOFocus(img);
setImageWFocus(img);
if (img == null) {
setSize(0, 0);
} else {
setSize(FOLD_ICON_WIDTH, FOLD_ICON_HEIGHT);
}
}
}
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