netcharts.graphics
Interface NFDragObserver

All Known Implementing Classes:

NFGraph

public interface NFDragObserver

This interface allows any object to monitor the dragging activity of another object, such as an NFPiechart, NFDiagram or NFNote.

Method Summary

void	postDrag(java.lang.Object obj, double newX, double newY) This method is called immediately after a drag activity, allowing the observer to monitor the new settings.
boolean	preDrag(java.lang.Object obj, double curX, double curY, double newX, double newY) This method is called immediately prior to a drag operation, allowing the observer to examine the current and desired settings and to perform any custom processing.

Method Detail

preDrag

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

This method is called immediately prior to a drag operation, allowing the observer to examine the current and desired settings and to perform any custom processing. The <obj> pointer specifies the object which is being scrolled. 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)

This method is called immediately after a drag activity, allowing the observer to monitor the new settings. The <obj> pointer specifies the object that was affected.

Parameters:

obj - The object dragged.

newX - The new X value.

newY - The new Y value.