edu.umd.cs.jazz.util
Interface ZScrollDirector

All Known Implementing Classes:

ZDefaultScrollDirector

public interface ZScrollDirector

The interface an application can implement to control scrolling in a ZScrollPane->ZViewport->ZCanvas component hierarchy.

Author:

Lance Good

See Also:

ZDefaultScrollDirector

Method Summary

java.awt.Point	getViewPosition(java.awt.geom.Rectangle2D r) Get the View position given the specified camera bounds
java.awt.Dimension	getViewSize(java.awt.geom.Rectangle2D r) Get the size of the view based on the specified camera bounds
void	install(ZViewport viewport, ZCanvas view) Installs the scroll director
void	setViewPosition(double x, double y) Set the view position
void	unInstall() Uninstall the scroll director

Method Detail

install

public void install(ZViewport viewport,
                    ZCanvas view)

Installs the scroll director

Parameters:

viewPort - The viewport on which this director directs

view - The ZCanvas that the viewport looks at

unInstall

public void unInstall()

Uninstall the scroll director

getViewPosition

public java.awt.Point getViewPosition(java.awt.geom.Rectangle2D r)

Get the View position given the specified camera bounds

Parameters:

viewBounds - The bounds for which the view position will be computed

Returns:

The view position

setViewPosition

public void setViewPosition(double x,
                            double y)

Set the view position

Parameters:

x - The new x position

y - The new y position

getViewSize

public java.awt.Dimension getViewSize(java.awt.geom.Rectangle2D r)

Get the size of the view based on the specified camera bounds

Parameters:

viewBounds - The view bounds for which the view size will be computed

Returns:

The view size