/*!
* 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.editor.expressions;
import java.awt.Component;
import java.awt.Dialog;
import java.awt.Frame;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultTreeSelectionModel;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;
import org.pentaho.reporting.designer.core.util.exceptions.UncaughtExceptionsModel;
import org.pentaho.reporting.engine.classic.core.function.Expression;
import org.pentaho.reporting.engine.classic.core.metadata.ExpressionMetaData;
import org.pentaho.reporting.libraries.designtime.swing.CommonDialog;
public class ExpressionChooserDialog extends CommonDialog
{
private JTree expressionsTree;
private ExpressionChooserDialog.AddAction addAction;
private Expression expression;
public ExpressionChooserDialog()
throws HeadlessException
{
init();
}
public ExpressionChooserDialog(final Frame owner)
throws HeadlessException
{
super(owner);
init();
}
public ExpressionChooserDialog(final Dialog owner)
throws HeadlessException
{
super(owner);
init();
}
protected void init()
{
setTitle(EditorExpressionsMessages.getString("ExpressionChooserDialog.Title"));
setModal(true);
final DefaultTreeSelectionModel selectionModel = new DefaultTreeSelectionModel();
selectionModel.setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
selectionModel.addTreeSelectionListener(new ExpressionSelectionHandler());
expressionsTree = new JTree(ExpressionsTreeModel.getTreeModel());
expressionsTree.setRootVisible(false);
expressionsTree.setSelectionModel(selectionModel);
expressionsTree.addMouseListener(new DblClickHandler());
expressionsTree.setCellRenderer(new ExpressionTreeCellRenderer());
addAction = new AddAction();
super.init();
}
protected String getDialogId()
{
return "ReportDesigner.Core.ExpressionChooser";
}
protected Component createContentPane()
{
return (new JScrollPane(expressionsTree));
}
private class DblClickHandler extends MouseAdapter
{
private DblClickHandler()
{
}
public void mouseClicked(final MouseEvent e)
{
if (e.getButton() != 1)
{
return;
}
if (e.getClickCount() < 2)
{
return;
}
if (addAction.isEnabled())
{
addAction.actionPerformed(null);
}
}
}
protected boolean validateInputs(final boolean onConfirm)
{
final TreePath selectionPath = expressionsTree.getSelectionPath();
final Object o = selectionPath.getLastPathComponent();
if (o instanceof ExpressionMetaData == false)
{
return false;
}
return true;
}
private class AddAction extends AbstractAction
{
private AddAction()
{
putValue(Action.NAME, EditorExpressionsMessages.getString("ExpressionChooserDialog.Add"));
setEnabled(false);
}
public void actionPerformed(final ActionEvent e)
{
final TreePath selectionPath = expressionsTree.getSelectionPath();
final Object o = selectionPath.getLastPathComponent();
if (o instanceof ExpressionMetaData == false)
{
return;
}
try
{
final ExpressionMetaData metaData = (ExpressionMetaData) o;
expression = (Expression) metaData.getExpressionType().newInstance();
}
catch (Exception e1)
{
UncaughtExceptionsModel.getInstance().addException(e1);
}
setConfirmed(true);
dispose();
}
}
private class ExpressionSelectionHandler implements TreeSelectionListener
{
private ExpressionSelectionHandler()
{
}
public void valueChanged(final TreeSelectionEvent e)
{
final TreePath path = e.getPath();
if (path == null)
{
addAction.setEnabled(false);
return;
}
final Object o = path.getLastPathComponent();
if (o instanceof ExpressionMetaData)
{
addAction.setEnabled(true);
}
else
{
addAction.setEnabled(false);
}
}
}
public Expression performSelect()
{
expression = null;
if (performEdit() == false)
{
return null;
}
if (expression == null)
{
addAction.actionPerformed(null);
}
return expression;
}
}