| /******************************************************************************* |
| * Copyright (c) 2005, 2012 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.bpel.ui.util; |
| |
| import java.util.Iterator; |
| |
| import org.eclipse.bpel.ui.editparts.util.GraphAnimation; |
| import org.eclipse.draw2d.IFigure; |
| import org.eclipse.draw2d.XYLayout; |
| import org.eclipse.draw2d.geometry.Dimension; |
| import org.eclipse.draw2d.geometry.Point; |
| import org.eclipse.draw2d.geometry.Rectangle; |
| |
| |
| /** |
| * Our version of XYLayout that doesn't allow negative x,y children to be clipped. |
| * It also has size attribute that overrides what the preferred size should be. |
| */ |
| public class NonclippingXYLayout extends XYLayout { |
| |
| private Point displacement = new Point(0, 0); |
| private Dimension size; |
| |
| /** |
| * @return the offset of the children in the container |
| */ |
| public Point getDisplacement() { |
| return displacement; |
| } |
| |
| @Override |
| public void layout(IFigure parent) { |
| GraphAnimation.recordInitialState(parent); |
| if (GraphAnimation.playbackState(parent)) |
| return; |
| |
| Point offset = getOrigin(parent); |
| IFigure f; |
| |
| // calculate a new displacement |
| refreshDisplacement(parent); |
| |
| Iterator children; |
| children = parent.getChildren().iterator(); |
| while (children.hasNext()) { |
| f = (IFigure) children.next(); |
| Rectangle bounds = (Rectangle) getConstraint(f); |
| if (bounds == null) |
| continue; |
| bounds = bounds.getTranslated(offset); |
| if (bounds.width == -1 || bounds.height == -1) { |
| Dimension preferredSize = f.getPreferredSize(); |
| bounds = bounds.getCopy(); |
| if (bounds.width == -1) |
| bounds.width = preferredSize.width; |
| if (bounds.height == -1) |
| bounds.height = preferredSize.height; |
| } |
| bounds = bounds.getTranslated(displacement); |
| f.setBounds(bounds); |
| } |
| } |
| |
| public void refreshDisplacement(IFigure parent) { |
| IFigure f; |
| |
| // calculate a new displacement |
| Iterator children = parent.getChildren().iterator(); |
| int minX = 0, minY = 0; |
| while (children.hasNext()) { |
| f = (IFigure) children.next(); |
| Rectangle bounds = (Rectangle) getConstraint(f); |
| if (bounds == null) |
| continue; |
| if (bounds.x < 0) |
| minX = Math.min(minX, bounds.x); |
| if (bounds.y < 0) |
| minY = Math.min(minY, bounds.y); |
| } |
| displacement = new Point(-minX, -minY); |
| } |
| |
| @Override |
| public void setConstraint(IFigure figure, Object newConstraint) { |
| Rectangle bounds = null; |
| if (newConstraint != null) { |
| bounds = ((Rectangle) newConstraint).getCopy(); |
| bounds.translate(-displacement.x, -displacement.y); |
| } |
| super.setConstraint(figure, bounds); |
| // if (bounds != null) |
| // constraints.put(figure, bounds); |
| } |
| @Override |
| protected Dimension calculatePreferredSize(IFigure f, int wHint, int hHint) { |
| Dimension result = super.calculatePreferredSize(f, wHint, hHint); |
| if (size != null) { |
| Dimension largest = new Dimension(size); |
| largest.width = Math.max(result.width, size.width); |
| largest.height = Math.max(result.height, size.height); |
| return largest; |
| } |
| |
| return result; |
| } |
| public void setSize(Dimension size) { |
| this.size = size; |
| } |
| } |