/************************************************************************************
* Copyright (c) 2008 William Chen. *
* *
* 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 *
* *
* Use is subject to the terms of Eclipse Public License v1.0. *
* *
* Contributors: *
* William Chen - initial API and implementation. *
************************************************************************************/
package org.dyno.visual.swing.widgets.undo;
import java.awt.Component;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JPanel;
import org.dyno.visual.swing.plugin.spi.LayoutAdapter;
import org.dyno.visual.swing.widgets.JPanelAdapter;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.operations.AbstractOperation;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
public class NullLayoutOperation extends AbstractOperation {
private JPanelAdapter adapter;
private LayoutAdapter oldLayoutAdapter;
private List<Pair> constraints;
class Pair {
Component child;
Object constraints;
}
public NullLayoutOperation(JPanelAdapter adapter) {
super(Messages.NullLayoutOperation_Set_Layout);
this.adapter = adapter;
this.oldLayoutAdapter = adapter.getLayoutAdapter();
}
@Override
public IStatus execute(IProgressMonitor monitor, IAdaptable info)
throws ExecutionException {
constraints = new ArrayList<Pair>();
for (int i = 0; i < adapter.getChildCount(); i++) {
Component child = adapter.getChild(i);
Object cons = adapter.getChildConstraints(child);
Pair pair = new Pair();
pair.child = child;
pair.constraints = cons;
constraints.add(pair);
}
JPanel jpanel = (JPanel) adapter.getWidget();
jpanel.setLayout(null);
adapter.setLayoutAdapter(null);
adapter.doLayout();
jpanel.validate();
return Status.OK_STATUS;
}
@Override
public IStatus redo(IProgressMonitor monitor, IAdaptable info)
throws ExecutionException {
return execute(monitor, info);
}
@Override
public IStatus undo(IProgressMonitor monitor, IAdaptable info)
throws ExecutionException {
JPanel jpanel = (JPanel) adapter.getWidget();
jpanel.removeAll();
if (oldLayoutAdapter != null)
oldLayoutAdapter.initConainerLayout(jpanel, monitor);
else
jpanel.setLayout(null);
for (Pair pair : constraints) {
adapter.addChildByConstraints(pair.child, pair.constraints);
}
adapter.doLayout();
adapter.setLayoutAdapter(null);
jpanel.validate();
adapter.setDirty(true);
adapter.addNotify();
return Status.OK_STATUS;
}
}