edu.umd.cs.piccolox.swing

Interface PScrollDirector

All Known Implementing Classes:

PDefaultScrollDirector, PrintExample.DocumentScrollDirector, ScrollingExample.DocumentScrollDirector

public interface PScrollDirector

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

Author:

Lance Good

See Also:

PDefaultScrollDirector

Method Summary

Methods

Modifier and Type	Method and Description
Point	getViewPosition(Rectangle2D viewBounds) Get the View position given the specified camera bounds.
Dimension	getViewSize(Rectangle2D viewBounds) Get the size of the view based on the specified camera bounds.
void	install(PViewport viewport, PCanvas view) Installs the scroll director.
void	setViewPosition(double x, double y) Set the view position.
void	unInstall() Uninstall the scroll director.

Method Detail

install

void install(PViewport viewport,
           PCanvas view)

Installs the scroll director.

Parameters:

viewport - The viewport on which this director directs

view - The ZCanvas that the viewport looks at

unInstall

void unInstall()

Uninstall the scroll director.

getViewPosition

Point getViewPosition(Rectangle2D viewBounds)

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

void setViewPosition(double x,
                   double y)

Set the view position.

Parameters:

x - The new x position

y - The new y position

getViewSize

Dimension getViewSize(Rectangle2D viewBounds)

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