StephenChamberlain/nsis4netbeans

/*
 * NSIS 4 NetBeans
 * Copyright (C) 2016 Stephen Chamberlain
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package uk.co.chamberlain.netbeans.nsis.options;

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.TopLevelRegistration(
        categoryName = "#OptionsCategory_Name_Nsis",
        iconBase = "uk/co/chamberlain/netbeans/nsis/options/nsis32x32.png",
        keywords = "#OptionsCategory_Keywords_Nsis",
        keywordsCategory = "Nsis",
        position = 801
)
@org.openide.util.NbBundle.Messages({"OptionsCategory_Name_Nsis=NSIS", "OptionsCategory_Keywords_Nsis=NSIS"})
public final class NsisOptionsPanelController extends OptionsPanelController {

    private NsisPanel panel;
    private final PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(this);
    private boolean changed;

    @Override
    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(final Lookup lookup) {
        return getPanel();
    }

    @Override
    public void addPropertyChangeListener(final PropertyChangeListener propertyChangeListener) {
        propertyChangeSupport.addPropertyChangeListener(propertyChangeListener);
    }

    @Override
    public void removePropertyChangeListener(final PropertyChangeListener propertyChangeListener) {
        propertyChangeSupport.removePropertyChangeListener(propertyChangeListener);
    }

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

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

}