netcharts.pro.event
Interface NFChartDragListener

All Superinterfaces:

java.util.EventListener, NFChartActionListener

public interface NFChartDragListener

extends NFChartActionListener

NFChartDragListener interface can be implemented by any object that wants to be notified of drag activity within a chart.

Method Summary

void	postDrag(java.lang.Object obj, double newX, double newY) Method called when a NFChartEvent.POSTDRAG event occurs.
boolean	preDrag(java.lang.Object obj, double curX, double curY, double newX, double newY) Method called when a NFChartEvent.PREDRAG event occurs.

Methods inherited from interface netcharts.pro.event.NFChartActionListener

chartActionPerformed

Method Detail

preDrag

public boolean preDrag(java.lang.Object obj,
                       double curX,
                       double curY,
                       double newX,
                       double newY)

Method called when a NFChartEvent.PREDRAG event occurs. This method will be called in place of chartActionPerformed. If a return value of "true" is specified, then the drag action will be allowed. Otherwise, it will be aborted.

Parameters:

obj - The object being dragged.

curX - The current X value.

curY - The current Y value.

newX - The new X value.

newY - The new Y value.

Returns:

Whether to perform the drag or not.

postDrag

public void postDrag(java.lang.Object obj,
                     double newX,
                     double newY)

Method called when a NFChartEvent.POSTDRAG event occurs. This method will be called in place of chartActionPerformed.

Parameters:

obj - The object dragged.

newX - The new X value.

newY - The new Y value.