/*******************************************************************************
* Copyright (c) 2011 Red Hat, Inc.
* All rights reserved.
* This program is 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, Inc. - initial API and implementation
******************************************************************************/
package org.eclipse.bpmn2.modeler.core.features.lane;
import org.eclipse.bpmn2.Lane;
import org.eclipse.bpmn2.modeler.core.features.BusinessObjectUtil;
import org.eclipse.bpmn2.modeler.core.features.DefaultBPMNResizeFeature;
import org.eclipse.bpmn2.modeler.core.utils.FeatureSupport;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.context.IResizeShapeContext;
import org.eclipse.graphiti.mm.algorithms.GraphicsAlgorithm;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
public class ResizeLaneFeature extends DefaultBPMNResizeFeature {
public ResizeLaneFeature(IFeatureProvider fp) {
super(fp);
}
@Override
public boolean canResizeShape(IResizeShapeContext context) {
boolean isLane = FeatureSupport.isLane(context.getPictogramElement());
if (!isLane) {
return false;
}
boolean isParentLane = FeatureSupport.isLane(((ContainerShape) context.getPictogramElement()).getContainer());
if (!isParentLane) {
return true;
}
if (context.getHeight() == -1 && context.getWidth() == -1) {
return true;
}
GraphicsAlgorithm ga = ((ContainerShape) context.getPictogramElement()).getGraphicsAlgorithm();
int i = compare(ga.getHeight(), ga.getWidth(), context.getHeight(), context.getWidth());
Lane lane = (Lane) BusinessObjectUtil.getFirstElementOfType(context.getPictogramElement(), Lane.class);
if (i < 0 && lane.getFlowNodeRefs().size() == 0) {
return true;
}
if (i > 0) {
return true;
}
return true;
}
private int compare(int heightBefore, int widthBefore, int heightAfter, int widthAfter) {
if (heightAfter > heightBefore || widthAfter > widthBefore) {
return 1;
}
if (heightAfter < heightBefore || widthAfter < widthBefore) {
return -1;
}
return 0;
}
}