/*
* @(#)DeleteCommand.java
*
* Project: JHotdraw - a GUI framework for technical drawings
* http://www.jhotdraw.org
* http://jhotdraw.sourceforge.net
* Copyright: (c) by the original author(s) and all contributors
* License: Lesser GNU Public License (LGPL)
* http://www.opensource.org/licenses/lgpl-license.html
*/
package org.jhotdraw.standard;
import java.util.List;
import org.jhotdraw.framework.DrawingEditor;
import org.jhotdraw.framework.Figure;
import org.jhotdraw.framework.FigureEnumeration;
import org.jhotdraw.util.CollectionsFactory;
import org.jhotdraw.util.Undoable;
import org.jhotdraw.util.UndoableAdapter;
/**
* Command to delete the selection.
*
* @version <$CURRENT_VERSION$>
*/
public class DeleteCommand extends FigureTransferCommand {
/**
* Constructs a delete command.
* @param name the command name
* @param newDrawingEditor the DrawingEditor which manages the views
*/
public DeleteCommand(String name, DrawingEditor newDrawingEditor) {
super(name, newDrawingEditor);
}
/**
* @see org.jhotdraw.util.Command#execute()
*/
public void execute() {
super.execute();
setUndoActivity(createUndoActivity());
/* ricardo_padilha: bugfix for correct delete/undelete behavior
* When enumerating the affected figures we must not forget the dependent
* figures, since they are deleted as well!
*/
FigureEnumeration fe = view().selection();
List affected = CollectionsFactory.current().createList();
Figure f;
FigureEnumeration dfe;
while (fe.hasNextFigure()) {
f = fe.nextFigure();
affected.add(0, f);
dfe = f.getDependendFigures();
if (dfe != null) {
while (dfe.hasNextFigure()) {
affected.add(0, dfe.nextFigure());
}
}
}
fe = new FigureEnumerator(affected);
getUndoActivity().setAffectedFigures(fe);
/* ricardo_padilha: end of bugfix */
deleteFigures(getUndoActivity().getAffectedFigures());
view().checkDamage();
}
/**
* @see org.jhotdraw.standard.AbstractCommand#isExecutableWithView()
*/
protected boolean isExecutableWithView() {
return view().selectionCount() > 0;
}
/**
* Factory method for undo activity
* @return Undoable
*/
protected Undoable createUndoActivity() {
return new DeleteCommand.UndoActivity(this);
}
public static class UndoActivity extends UndoableAdapter {
private FigureTransferCommand myCommand;
/**
* Constructor for <code>UndoActivity</code>.
* @param newCommand parent command
*/
public UndoActivity(FigureTransferCommand newCommand) {
super(newCommand.view());
myCommand = newCommand;
setUndoable(true);
setRedoable(true);
}
/**
* @see org.jhotdraw.util.Undoable#undo()
*/
public boolean undo() {
if (super.undo() && getAffectedFigures().hasNextFigure()) {
getDrawingView().clearSelection();
setAffectedFigures(
myCommand.insertFigures(getAffectedFiguresReversed(), 0, 0));
return true;
}
return false;
}
/**
* @see org.jhotdraw.util.Undoable#redo()
*/
public boolean redo() {
// do not call execute directly as the selection might has changed
if (isRedoable()) {
myCommand.deleteFigures(getAffectedFigures());
getDrawingView().clearSelection();
return true;
}
return false;
}
}
}