edu.umd.cs.piccolo.examples

Class ScrollingExample.DocumentScrollDirector

java.lang.Object

edu.umd.cs.piccolox.swing.PDefaultScrollDirector

edu.umd.cs.piccolo.examples.ScrollingExample.DocumentScrollDirector

All Implemented Interfaces:

PScrollDirector, PropertyChangeListener, EventListener

Enclosing class:

ScrollingExample

public class ScrollingExample.DocumentScrollDirector
extends PDefaultScrollDirector

A modified scroll director that performs document based scroling rather than window based scrolling (ie. the scrollbars act in the inverse direction as normal)

Field Summary

Fields inherited from class edu.umd.cs.piccolox.swing.PDefaultScrollDirector

camera, root, scrollInProgress, scrollPane, view, viewPort

Constructor Summary

Constructors

Constructor and Description
ScrollingExample.DocumentScrollDirector()

Method Summary

Methods

Modifier and Type	Method and Description
Point	getViewPosition(Rectangle2D viewBounds) Get the View position given the specified camera bounds - modified such that: Rather than finding the distance from the upper left corner of the window to the upper left corner of the document - we instead find the distance from the lower right corner of the window to the upper left corner of the document THEN we subtract that value from total document width so that the position is inverted
void	setViewPosition(double x, double y) We do the same thing we did in getViewPosition above to flip the document-window position relationship

Methods inherited from class edu.umd.cs.piccolox.swing.PDefaultScrollDirector

getViewSize, install, propertyChange, shouldRevalidateScrollPane, unInstall

Methods inherited from class java.lang.Object

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

Constructor Detail

ScrollingExample.DocumentScrollDirector

public ScrollingExample.DocumentScrollDirector()

Method Detail

getViewPosition

public Point getViewPosition(Rectangle2D viewBounds)

Get the View position given the specified camera bounds - modified such that: Rather than finding the distance from the upper left corner of the window to the upper left corner of the document - we instead find the distance from the lower right corner of the window to the upper left corner of the document THEN we subtract that value from total document width so that the position is inverted

Specified by:

getViewPosition in interface PScrollDirector

Overrides:

getViewPosition in class PDefaultScrollDirector

Parameters:

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

Returns:

The view position

setViewPosition

public void setViewPosition(double x,
                   double y)

We do the same thing we did in getViewPosition above to flip the document-window position relationship

Specified by:

setViewPosition in interface PScrollDirector

Overrides:

setViewPosition in class PDefaultScrollDirector

Parameters:

x - The new x position

y - The new y position