/*!
* 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;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import org.pentaho.reporting.designer.core.ReportDesignerContext;
import org.pentaho.reporting.designer.core.editor.ReportDocumentContext;
import org.pentaho.reporting.designer.core.editor.ReportRenderContext;
public abstract class AbstractReportContextAction extends AbstractDesignerContextAction
{
private class ActiveContextChangeHandler implements PropertyChangeListener
{
private ActiveContextChangeHandler()
{
}
/**
* This method gets called when a bound property is changed.
*
* @param evt A PropertyChangeEvent object describing the event source and the property that has changed.
*/
public void propertyChange(final PropertyChangeEvent evt)
{
final ReportRenderContext oldContext = (ReportRenderContext) evt.getOldValue();
final ReportRenderContext activeContext = (ReportRenderContext) evt.getNewValue();
updateActiveContext(oldContext, activeContext);
}
}
private ActiveContextChangeHandler changeHandler;
protected AbstractReportContextAction()
{
changeHandler = new ActiveContextChangeHandler();
}
protected ReportDocumentContext getActiveContext()
{
if (getReportDesignerContext() == null)
{
return null;
}
return getReportDesignerContext().getActiveContext();
}
protected void updateDesignerContext(final ReportDesignerContext oldContext, final ReportDesignerContext newContext)
{
if (oldContext != null)
{
oldContext.removePropertyChangeListener(this.changeHandler);
final ReportDocumentContext oldActiveContext = getActiveContext();
updateActiveContext(oldActiveContext, null);
}
super.updateDesignerContext(oldContext, newContext);
if (newContext != null)
{
newContext.addPropertyChangeListener(ReportDesignerContext.ACTIVE_CONTEXT_PROPERTY, changeHandler);
updateActiveContext(null, newContext.getActiveContext());
}
}
protected void updateActiveContext(final ReportDocumentContext oldContext,
final ReportDocumentContext newContext)
{
setEnabled(newContext != null);
ReportRenderContext oldCtx = null;
ReportRenderContext newCtx = null;
if (oldContext instanceof ReportRenderContext) {
oldCtx = (ReportRenderContext) oldContext;
}
if (newContext instanceof ReportRenderContext) {
newCtx = (ReportRenderContext) newContext;
}
updateActiveContext(oldCtx, newCtx);
}
protected void updateActiveContext(final ReportRenderContext oldContext,
final ReportRenderContext newContext)
{
setEnabled(newContext != null);
}
}