/*
* Copyright (C) 2012 Jason Gedge <http://www.gedge.ca>
*
* This file is part of the OpGraph project.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
*
*/
package ca.gedge.opgraph.app.edits.notes;
import java.awt.Color;
import javax.swing.JComponent;
import javax.swing.undo.AbstractUndoableEdit;
import javax.swing.undo.CannotRedoException;
import javax.swing.undo.CannotUndoException;
import ca.gedge.opgraph.app.extensions.Note;
/**
* Sets the color of a note.
*/
public class SetNoteColorEdit extends AbstractUndoableEdit {
/** The note's UI component */
private JComponent noteComp;
/** Old note color */
private Color oldColor;
/** New note color */
private Color newColor;
/**
* Constructs an edit that sets the color of a specified note.
*
* @param note the note whose color will be set
* @param color the new color
*
* @throws NullPointerException if <code>note</code> is <code>null</code>,
* or <code>note.getExtension(JComponent.class)</code> is
* <code>null</code>
*/
public SetNoteColorEdit(Note note, Color color) {
if(note == null)
throw new NullPointerException();
noteComp = note.getExtension(JComponent.class);
if(noteComp == null)
throw new NullPointerException();
this.oldColor = noteComp.getBackground();
this.newColor = color;
perform();
}
// XXX assumes noteComp doesn't change for the note
/**
* Performs this edit.
*/
private void perform() {
noteComp.setBackground(newColor);
}
//
// AbstractUndoableEdit
//
@Override
public String getPresentationName() {
return "Set Note Color";
}
@Override
public void redo() throws CannotRedoException {
super.redo();
perform();
}
@Override
public void undo() throws CannotUndoException {
super.undo();
noteComp.setBackground(oldColor);
}
}