/*******************************************************************************
* Copyright (c) 2000, 2005 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.gef.examples.logicdesigner.model.commands;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.examples.logicdesigner.LogicMessages;
import org.eclipse.gef.examples.logicdesigner.model.LogicDiagram;
import org.eclipse.gef.examples.logicdesigner.model.LogicGuide;
import org.eclipse.gef.examples.logicdesigner.model.LogicSubpart;
import org.eclipse.gef.examples.logicdesigner.model.Wire;
public class DeleteCommand
extends Command
{
private LogicSubpart child;
private LogicDiagram parent;
private LogicGuide vGuide, hGuide;
private int vAlign, hAlign;
private int index = -1;
private List sourceConnections = new ArrayList();
private List targetConnections = new ArrayList();
public DeleteCommand() {
super(LogicMessages.DeleteCommand_Label);
}
private void deleteConnections(LogicSubpart part) {
if (part instanceof LogicDiagram) {
List children = ((LogicDiagram)part).getChildren();
for (int i = 0; i < children.size(); i++)
deleteConnections((LogicSubpart)children.get(i));
}
sourceConnections.addAll(part.getSourceConnections());
for (int i = 0; i < sourceConnections.size(); i++) {
Wire wire = (Wire)sourceConnections.get(i);
wire.detachSource();
wire.detachTarget();
}
targetConnections.addAll(part.getTargetConnections());
for (int i = 0; i < targetConnections.size(); i++) {
Wire wire = (Wire)targetConnections.get(i);
wire.detachSource();
wire.detachTarget();
}
}
private void detachFromGuides(LogicSubpart part) {
if (part.getVerticalGuide() != null) {
vGuide = part.getVerticalGuide();
vAlign = vGuide.getAlignment(part);
vGuide.detachPart(part);
}
if (part.getHorizontalGuide() != null) {
hGuide = part.getHorizontalGuide();
hAlign = hGuide.getAlignment(part);
hGuide.detachPart(part);
}
}
public void execute() {
primExecute();
}
protected void primExecute() {
deleteConnections(child);
detachFromGuides(child);
index = parent.getChildren().indexOf(child);
parent.removeChild(child);
}
private void reattachToGuides(LogicSubpart part) {
if (vGuide != null)
vGuide.attachPart(part, vAlign);
if (hGuide != null)
hGuide.attachPart(part, hAlign);
}
public void redo() {
primExecute();
}
private void restoreConnections() {
for (int i = 0; i < sourceConnections.size(); i++) {
Wire wire = (Wire)sourceConnections.get(i);
wire.attachSource();
wire.attachTarget();
}
sourceConnections.clear();
for (int i = 0; i < targetConnections.size(); i++) {
Wire wire = (Wire)targetConnections.get(i);
wire.attachSource();
wire.attachTarget();
}
targetConnections.clear();
}
public void setChild (LogicSubpart c) {
child = c;
}
public void setParent(LogicDiagram p) {
parent = p;
}
public void undo() {
parent.addChild(child, index);
restoreConnections();
reattachToGuides(child);
}
}