<#--

    Licensed to the Apache Software Foundation (ASF) under one
    or more contributor license agreements.  See the NOTICE file
    distributed with this work for additional information
    regarding copyright ownership.  The ASF licenses this file
    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
    with the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing,
    software distributed under the License is distributed on an
    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    KIND, either express or implied.  See the License for the
    specific language governing permissions and limitations
    under the License.

-->
<#assign licenseFirst = "/*">
<#assign licensePrefix = " * ">
<#assign licenseLast = " */">
<#include "${project.licensePath}">

package ${PACKAGE_NAME};

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import javax.swing.JComponent;
import javax.swing.SwingUtilities;
import org.netbeans.spi.options.OptionsPanelController;
import org.openide.util.HelpCtx;
import org.openide.util.Lookup;

${OptionsPanelController_ANNOTATION}public final class ${OptionsPanelController_CLASS_NAME} extends OptionsPanelController {

    private ${Panel_CLASS_NAME} panel;
    private final PropertyChangeSupport pcs = new PropertyChangeSupport(this);
    private boolean changed;

    public void update() {
        getPanel().load();
        changed = false;
    }

    @Override
    public void applyChanges() {
        SwingUtilities.invokeLater(() -> {
            getPanel().store();
            changed = false;
        });
    }

    @Override
    public void cancel() {
        // need not do anything special, if no changes have been persisted yet
    }
    
    @Override
    public boolean isValid() {
        return getPanel().valid();
    }
    
    @Override
    public boolean isChanged() {
        return changed;
    }
    
    @Override
    public HelpCtx getHelpCtx() {
        return null; // new HelpCtx("...ID") if you have a help set
    }

    @Override
    public JComponent getComponent(Lookup masterLookup) {
        return getPanel();
    }

    @Override
    public void addPropertyChangeListener(PropertyChangeListener l) {
        pcs.addPropertyChangeListener(l);
    }

    @Override
    public void removePropertyChangeListener(PropertyChangeListener l) {
        pcs.removePropertyChangeListener(l);
    }

    private ${Panel_CLASS_NAME} getPanel() {
        if (panel == null) {
            panel = new ${Panel_CLASS_NAME}(this);
        }
        return panel;
    }

    void changed() {
        if (!changed) {
            changed = true;
            pcs.firePropertyChange(OptionsPanelController.PROP_CHANGED, false, true);
        }
        pcs.firePropertyChange(OptionsPanelController.PROP_VALID, null, null);
    }

}
