| /******************************************************************************* |
| * Copyright 2005, CHISEL Group, University of Victoria, Victoria, BC, Canada. |
| * 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: The Chisel Group, University of Victoria |
| *******************************************************************************/ |
| package org.eclipse.zest.layouts.algorithms; |
| |
| import org.eclipse.zest.layouts.LayoutStyles; |
| import org.eclipse.zest.layouts.dataStructures.InternalNode; |
| import org.eclipse.zest.layouts.dataStructures.InternalRelationship; |
| |
| /** |
| * A simple algorithm to arrange graph nodes in a layered horizontal tree-like layout. |
| * @see TreeLayoutAlgorithm |
| * |
| * @version 1.0 |
| * @author Rob Lintern |
| */ |
| public class HorizontalTreeLayoutAlgorithm extends TreeLayoutAlgorithm { |
| |
| /** |
| * Creates a horizontal tree layout with no style |
| */ |
| public HorizontalTreeLayoutAlgorithm() { |
| this(LayoutStyles.NONE); |
| } |
| |
| /** |
| * |
| */ |
| public HorizontalTreeLayoutAlgorithm(int styles) { |
| super(styles); |
| } |
| |
| protected void preLayoutAlgorithm(InternalNode[] entitiesToLayout, InternalRelationship[] relationshipsToConsider, double x, double y, double width, double height) { |
| // NOTE: width and height are swtiched here when calling super method |
| super.preLayoutAlgorithm(entitiesToLayout, relationshipsToConsider, x, y, height, width); |
| } |
| |
| protected void postLayoutAlgorithm(InternalNode[] entitiesToLayout, InternalRelationship[] relationshipsToConsider) { |
| // swap x->y and width->height |
| for (int i = 0; i < entitiesToLayout.length; i++) { |
| InternalNode entity = entitiesToLayout[i]; |
| entity.setInternalLocation(entity.getInternalY(), entity.getInternalX()); |
| entity.setInternalSize(entity.getInternalWidth(), entity.getInternalHeight()); |
| } |
| super.postLayoutAlgorithm(entitiesToLayout, relationshipsToConsider); |
| } |
| |
| protected boolean isValidConfiguration(boolean asynchronous, boolean continueous) { |
| if (asynchronous && continueous) |
| return false; |
| else if (asynchronous && !continueous) |
| return true; |
| else if (!asynchronous && continueous) |
| return false; |
| else if (!asynchronous && !continueous) |
| return true; |
| |
| return false; |
| } |
| |
| } |