furbelow

Class Autoscroller

java.lang.Object

furbelow.Autoscroller

All Implemented Interfaces:

Autoscroll

public class Autoscroller
extends Object
implements Autoscroll

Provides consistent drag/drop autoscrolling behavior for components which implement Autoscroll. The component's implementation of Autoscroll.getAutoscrollInsets() and Autoscroll.autoscroll(Point) should call through to this object's methods.

The default behavior is to scroll by the unit/line increment when near the edge of the viewport or the block/page increment when very near the edge.

Field Summary

Fields

Modifier and Type	Field and Description
static int	MARGIN

Constructor Summary

Constructors

Constructor and Description
Autoscroller(JComponent scrolled)
Autoscroller(JComponent scrolled, int normal, int fast, int unit, int block)

Method Summary

Modifier and Type	Method and Description
void	autoscroll(Point where) Invoke from Autoscroll.autoscroll(Point).
protected Insets	fastScrollInsets()
Insets	getAutoscrollInsets() Return the insets of the component's rectangle that should be active.
protected Insets	scrollInsets()

Methods inherited from class java.lang.Object

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

Field Detail

MARGIN

public static int MARGIN

Constructor Detail

Autoscroller

public Autoscroller(JComponent scrolled)

Autoscroller

public Autoscroller(JComponent scrolled,
                    int normal,
                    int fast,
                    int unit,
                    int block)

Method Detail

fastScrollInsets

protected Insets fastScrollInsets()

scrollInsets

protected Insets scrollInsets()

getAutoscrollInsets

public Insets getAutoscrollInsets()

Return the insets of the component's rectangle that should be active. Note that the actual inset values represent pixels in the component coordinate space which appear in the viewport.

Specified by:

getAutoscrollInsets in interface Autoscroll

autoscroll

public void autoscroll(Point where)

Invoke from Autoscroll.autoscroll(Point).

Specified by:

autoscroll in interface Autoscroll

Parameters:

where - The current cursor location in the target component coordinate space