Property change events that are related to the zoom level and the part of the world coordinate space that is shown in the view include the following Graph2DView properties:

In a PropertyChangeListener implementation test for these property names. The code snippet outlines a property change listener for the value of the zoom level. Listeners for other properties follow the same general pattern.

// 'view' is of type y.view.Graph2DView.

view.getCanvasComponent().addPropertyChangeListener(new PropertyChangeListener() {
    public void propertyChange(PropertyChangeEvent evt) {
      if ("Zoom".equals(evt.getPropertyName())) {
        double zoom = ((Double)evt.getNewValue()).doubleValue();
        // Do something with the value for the zoom level.
      }
    }
});

Property change events that are related to the grid mode of Graph2DView cover these properties:

Property Name	Value Type
GridColor	java.awt.Color
GridType	the constants defined in View2DConstants (boxed as java.lang.Integer)
GridMode	boolean (boxed as java.lang.Double)
GridResolution	double (boxed as java.lang.Double)
GridCursorActive	boolean (boxed as java.lang.Boolean)
GridVisible	boolean (boxed as java.lang.Boolean)

Related Reading

• World and View Coordinates (world coordinate and view coordinate space)
• Grid (grid support in the view)