FileTypeIdOptionsPanelController.java

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package org.sleuthkit.autopsy.modules.filetypeid;

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

@OptionsPanelController.TopLevelRegistration(
        categoryName = "#OptionsCategory_Name_FileTypeId",
        iconBase = "org/sleuthkit/autopsy/modules/filetypeid/user-defined-file-types-settings.png",
        keywords = "#OptionsCategory_Keywords_FileTypeId",
        keywordsCategory = "FileTypeId",
        position = 6
)
public final class FileTypeIdOptionsPanelController extends OptionsPanelController {

    private FileTypeIdGlobalSettingsPanel panel;
    private final PropertyChangeSupport pcs = new PropertyChangeSupport(this);
    private boolean changed;

    @Override
    public void update() {

        getPanel().load();
        changed = false;

    }

    @Override
    public void applyChanges() {
        if (changed) {
            getPanel().store();
            changed = false;
        }
    }

    @Override
    public void cancel() {
    }

    @Override
    public boolean isValid() {
        return true;
    }

    @Override
    public boolean isChanged() {
        return changed;
    }

    @Override
    public HelpCtx getHelpCtx() {
        return null;
    }

    @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 FileTypeIdGlobalSettingsPanel getPanel() {
        if (panel == null) {
            panel = new FileTypeIdGlobalSettingsPanel();
            panel.addPropertyChangeListener(new PropertyChangeListener() {
                @Override
                public void propertyChange(PropertyChangeEvent evt) {
                    if (evt.getPropertyName().equals(OptionsPanelController.PROP_CHANGED)) {
                        changed();
                    }
                }
            });
        }
        return panel;
    }

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

}