/*******************************************************************************
* 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.edit;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.examples.logicdesigner.LogicMessages;
import org.eclipse.gef.examples.logicdesigner.model.LED;
import org.eclipse.gef.examples.logicdesigner.model.LogicSubpart;
public class LEDEditPolicy
extends LogicElementEditPolicy
{
private static final String
INCREMENT_REQUEST = "Increment", //$NON-NLS-1$
DECREMENT_REQUEST = "Decrement"; //$NON-NLS-1$
public Command getCommand(Request request) {
if (INCREMENT_REQUEST.equals(request.getType()))
return getIncrementDecrementCommand(true);
if (DECREMENT_REQUEST.equals(request.getType()))
return getIncrementDecrementCommand(false);
return super.getCommand(request);
}
protected Command getIncrementDecrementCommand(boolean type){
IncrementDecrementCommand command = new IncrementDecrementCommand(type);
command.setChild((LogicSubpart)getHost().getModel());
return command;
}
static class IncrementDecrementCommand
extends org.eclipse.gef.commands.Command{
boolean isIncrement = true;
LED child = null;
public IncrementDecrementCommand(boolean increment){
super(LogicMessages.IncrementDecrementCommand_LabelText);
isIncrement=increment;
}
public void setChild(LogicSubpart child){
this.child=(LED)child;
}
public void execute(){
int value = child.getValue();
if(isIncrement){
if(value==15)value=-1;
child.setValue(value+1);
}else{
if(value==0)value=16;
child.setValue(value-1);
}
}
public void undo(){
isIncrement=!isIncrement;
execute();
isIncrement=!isIncrement;
}
public void redo(){
execute();
}
}
}