*/
package jalview.viewmodel;
+import java.beans.PropertyChangeSupport;
+
public abstract class ViewportProperties
{
+ protected PropertyChangeSupport changeSupport = new PropertyChangeSupport(
+ this);
+
+ public void addPropertyChangeListener(ViewportListenerI listener)
+ {
+ changeSupport.addPropertyChangeListener(listener);
+ }
+
+ public void removePropertyChangeListener(ViewportListenerI listener)
+ {
+ changeSupport.removePropertyChangeListener(listener);
+ }
}