/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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 Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.designer.core.actions.global;
import org.pentaho.reporting.designer.core.ReportDesignerContext;
import org.pentaho.reporting.designer.core.actions.AbstractDesignerContextAction;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
/**
* Todo: Document Me
*
* @author Ezequiel Cuellar
*/
public abstract class AbstractToolWindowStateAction extends AbstractDesignerContextAction {
private class ViewStateChangeHandler implements PropertyChangeListener {
private ViewStateChangeHandler() {
}
public void propertyChange( final PropertyChangeEvent evt ) {
recomputeEnabled();
}
}
private ViewStateChangeHandler changeHandler;
protected AbstractToolWindowStateAction() {
changeHandler = new ViewStateChangeHandler();
}
protected abstract String getPropertyName();
protected void updateDesignerContext( final ReportDesignerContext oldContext,
final ReportDesignerContext newContext ) {
if ( oldContext != null ) {
oldContext.getView().removePropertyChangeListener( getPropertyName(), changeHandler );
}
super.updateDesignerContext( oldContext, newContext );
if ( newContext != null ) {
newContext.getView().addPropertyChangeListener( getPropertyName(), changeHandler );
}
if ( newContext == null ) {
setEnabled( false );
return;
}
recomputeEnabled();
}
protected abstract boolean recomputeEnabled();
}