com.vistech.imageviewer
Interface ScrollController

All Known Subinterfaces:

PanZoomController

All Known Implementing Classes:

Scroll, JAIImageCanvas, RenderableImageCanvas

public interface ScrollController

Specifies methods to scroll an image on a canvas.

Version:

1.0 1 Nov 1999

Author:

Lawrence Rodrigues

Method Summary

java.awt.Point	getPanOffset() Returns the panOffset property.
void	scroll(int x, int y) Scrolls the image.
void	setPanOffset(java.awt.Point panOffset) Gets the panOffset property.
void	startScroll(int x, int y) Starts the scroll and sets the anchor point.
void	stopScroll() Stops scroll.

Method Detail

setPanOffset

public void setPanOffset(java.awt.Point panOffset)

Gets the panOffset property.

Parameters:

panOffset - the offset by which the currently displayed image is moved from the previous position.

getPanOffset

public java.awt.Point getPanOffset()

Returns the panOffset property.

Returns:

the panOffset.

startScroll

public void startScroll(int x,
                        int y)

Starts the scroll and sets the anchor point.

Parameters:

x - the x coordinate of the scroll anchor.

y - the y coordinate of the scroll anchor.

scroll

public void scroll(int x,
                   int y)

Scrolls the image.

Parameters:

x - the x coordinate of the current position.

y - the y coordinate of the current position.

stopScroll

public void stopScroll()

Stops scroll.