Possible from 7.3 onwards, since Widget now implements Lookup.Provider for the first time:
import java.awt.Point;
import java.io.IOException;
import org.netbeans.api.visual.action.ActionFactory;
import org.netbeans.api.visual.action.MoveProvider;
import org.netbeans.api.visual.widget.LabelWidget;
import org.netbeans.api.visual.widget.Scene;
import org.netbeans.api.visual.widget.Widget;
import org.netbeans.spi.actions.AbstractSavable;
import org.openide.util.Lookup;
import org.openide.util.lookup.AbstractLookup;
import org.openide.util.lookup.InstanceContent;
import org.openide.windows.TopComponent;
public class MyWidget extends LabelWidget {
private MySavable mySavable;
private Lookup lookup;
private TopComponent tc;
private InstanceContent ic;
public MyWidget(Scene scene, String label, TopComponent tc) {
super(scene, label);
this.tc = tc;
ic = new InstanceContent();
getActions().addAction(ActionFactory.createMoveAction(null, new MoveStrategyProvider()));
}
@Override
public Lookup getLookup() {
if (lookup == null) {
lookup = new AbstractLookup(ic);
}
return lookup;
}
private class MoveStrategyProvider implements MoveProvider {
@Override
public void movementStarted(Widget widget) {
}
@Override
public void movementFinished(Widget widget) {
modify();
}
@Override
public Point getOriginalLocation(Widget widget) {
return ActionFactory.createDefaultMoveProvider().getOriginalLocation(widget);
}
@Override
public void setNewLocation(Widget widget, Point point) {
ActionFactory.createDefaultMoveProvider().setNewLocation(widget, point);
}
}
private void modify() {
if (getLookup().lookup(MySavable.class) == null) {
ic.add(mySavable = new MySavable());
}
}
private class MySavable extends AbstractSavable {
public MySavable() {
register();
}
TopComponent tc() {
return tc;
}
@Override
protected String findDisplayName() {
return getLabel();
}
@Override
protected void handleSave() throws IOException {
ic.remove(mySavable);
unregister();
}
@Override
public boolean equals(Object obj) {
if (obj instanceof MySavable) {
MySavable m = (MySavable) obj;
return tc() == m.tc();
}
return false;
}
@Override
public int hashCode() {
return tc().hashCode();
}
}
}
