com.klg.jclass.chart3d.j2d.actions
Class ZoomAction

java.lang.Object
  |
  +--com.klg.jclass.chart3d.j2d.actions.BaseAction
        |
        +--com.klg.jclass.chart3d.j2d.actions.ZoomAction

All Implemented Interfaces:

JCAction, Serializable

public class ZoomAction

extends BaseAction

Handler object for zoom actions within JClass Chart 3D Java2D. When a zoom action is started, JCChart3dArea will create an instance of ZoomAction and call start(), animate() and end() at appropriate points. A mapping from event to action type is stored the chart's JCActionTable.

See Also:

JCAction, JCActionTable, BaseAction, Serialized Form

Field Summary

Fields inherited from class com.klg.jclass.chart3d.j2d.actions.BaseAction

ANIMATING, chart3dArea, enabled, NONE, START, status

Constructor Summary

ZoomAction()
Default constructor.

Method Summary

void	animate(InputEvent event, int x, int y) Called by JCChart3dArea when the action is to be animated.
void	cancel() Called by JCChart3dArea when the action is cancelled
void	end(InputEvent event, int x, int y) Called by JCChar3dArea when the action is over.
void	reanimate(int x, int y) Called by JCChart3dArea when the chart area has been refreshed and the animation must be redrawn.
void	start(InputEvent event, int x, int y) Called by JCChart3dArea when the action is started.

Methods inherited from class com.klg.jclass.chart3d.j2d.actions.BaseAction

drawPreview, getChart3d, getChart3dArea, initialize, isEnabled, setChart3dArea, setEnabled

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ZoomAction

public ZoomAction()

Default constructor.

Method Detail

start

public void start(InputEvent event,
                  int x,
                  int y)

Called by JCChart3dArea when the action is started. For the zoom action, this method saves the start point as the anchor for the zoom rectangle.

Specified by:

start in interface JCAction

Specified by:

start in class BaseAction

Parameters:

event - The event for the action

x - The x pixel position where zooming is starting

y - The y pixel position where zooming is starting

animate

public void animate(InputEvent event,
                    int x,
                    int y)

Called by JCChart3dArea when the action is to be animated. For the zoom action, thid method undraws the previous rubber-band rectangle and draws a new rubber-band rectangle from the start point to the current point. The rectangle represents the zoom area.

Specified by:

animate in interface JCAction

Specified by:

animate in class BaseAction

Parameters:

event - The event for the action

x - The x pixel position where animation is happening

y - The y pixel position where animation is happening

reanimate

public void reanimate(int x,
                      int y)

Called by JCChart3dArea when the chart area has been refreshed and the animation must be redrawn.

Specified by:

reanimate in interface JCAction

Specified by:

reanimate in class BaseAction

Parameters:

x - The x pixel position where re-animation is happening

y - The y pixel position where re-animation is happening

end

public void end(InputEvent event,
                int x,
                int y)

Called by JCChar3dArea when the action is over. For the zoom action, this method takes the start point and the current point and uses them to zoom along the horizontal and vertical action axes.

Specified by:

end in interface JCAction

Specified by:

end in class BaseAction

Parameters:

event - The event for the action

x - The x pixel position where the user finished zooming

y - The y pixel position where the user finished zooming

cancel

public void cancel()

Called by JCChart3dArea when the action is cancelled

Specified by:

cancel in interface JCAction

Specified by:

cancel in class BaseAction