/******************************************************************************* * Copyright (c) 2009 the CHISEL group and contributors. * 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: * Del Myers -- initial API and implementation *******************************************************************************/ package org.eclipse.zest.custom.sequence.figures; //@tag copied : copied from org.eclipse.draw2d import java.util.List; import org.eclipse.draw2d.FigureListener; import org.eclipse.draw2d.FreeformFigure; import org.eclipse.draw2d.FreeformListener; import org.eclipse.draw2d.IFigure; import org.eclipse.draw2d.geometry.Insets; import org.eclipse.draw2d.geometry.Rectangle; class FreeformHelper implements FreeformListener { class ChildTracker implements FigureListener { public void figureMoved(IFigure source) { invalidate(); } } private FreeformFigure host; private Rectangle freeformExtent; private FigureListener figureListener = new ChildTracker(); FreeformHelper(FreeformFigure host) { this.host = host; } public Rectangle getFreeformExtent() { if (freeformExtent != null) return freeformExtent; Rectangle r; List<?> children = host.getChildren(); for (int i = 0; i < children.size(); i++) { IFigure child = (IFigure)children.get(i); if (child instanceof FreeformFigure) r = ((FreeformFigure) child).getFreeformExtent(); else r = child.getBounds(); if (freeformExtent == null) freeformExtent = r.getCopy(); else freeformExtent.union(r); } Insets insets = host.getInsets(); if (freeformExtent == null) freeformExtent = new Rectangle(0, 0, insets.getWidth(), insets.getHeight()); else { host.translateToParent(freeformExtent); freeformExtent.expand(insets); } return freeformExtent; } public void hookChild(IFigure child) { invalidate(); if (child instanceof FreeformFigure) ((FreeformFigure)child).addFreeformListener(this); else child.addFigureListener(figureListener); } void invalidate() { freeformExtent = null; host.fireExtentChanged(); if (host.getParent() != null) host.getParent().revalidate(); else host.revalidate(); } public void notifyFreeformExtentChanged() { //A childs freeform extent has changed, therefore this extent must be recalculated invalidate(); } public void setFreeformBounds(Rectangle bounds) { host.setBounds(bounds); bounds = bounds.getCopy(); host.translateFromParent(bounds); List<?> children = host.getChildren(); for (int i = 0; i < children.size(); i++) { IFigure child = (IFigure)children.get(i); if (child instanceof FreeformFigure) ((FreeformFigure) child).setFreeformBounds(bounds); } } public void unhookChild(IFigure child) { invalidate(); if (child instanceof FreeformFigure) ((FreeformFigure)child).removeFreeformListener(this); else child.removeFigureListener(figureListener); } }