Class StartOffStart

java.lang.Object

org.fxmisc.flowless.StartOffStart

All Implemented Interfaces:

TargetPosition

final class StartOffStart
extends Object
implements TargetPosition

A TargetPosition that instructs its TargetPositionVisitor to use the cell at itemIndex as the anchor cell, showing it at the "top" of the viewport and to offset it by offsetFromStart.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) final int	itemIndex
(package private) final double	offsetFromStart

Fields inherited from interface TargetPosition

BEGINNING

Constructor Summary

Constructors

Constructor	Description
StartOffStart(int itemIndex, double offsetFromStart)

Method Summary

Modifier and Type	Method	Description
void	accept(TargetPositionVisitor visitor)	Visitor Pattern: prevents type-checking the implementation
TargetPosition	clamp(int size)	Insures this position's item index is between 0 and size
(package private) static int	clamp(int idx, int size)
TargetPosition	scrollBy(double delta)
TargetPosition	transformByChange(int pos, int removedSize, int addedSize)	When the list of items, those displayed in the viewport, and those that are not, are modified, transforms this change to account for those modifications.

Methods inherited from class Object

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

Field Details

itemIndex

final int itemIndex

offsetFromStart

final double offsetFromStart

Constructor Details

StartOffStart

StartOffStart(int itemIndex,
 double offsetFromStart)

Method Details

transformByChange

public TargetPosition transformByChange(int pos,
 int removedSize,
 int addedSize)

Description copied from interface: TargetPosition

When the list of items, those displayed in the viewport, and those that are not, are modified, transforms this change to account for those modifications.

Specified by:

transformByChange in interface TargetPosition

Parameters:

pos - the cell index where the change begins

removedSize - the amount of cells that were removed, starting from pos

addedSize - the amount of cells that were added, starting from pos

scrollBy

public TargetPosition scrollBy(double delta)

Specified by:

scrollBy in interface TargetPosition

accept

public void accept(TargetPositionVisitor visitor)

Description copied from interface: TargetPosition

Visitor Pattern: prevents type-checking the implementation

Specified by:

accept in interface TargetPosition

clamp

public TargetPosition clamp(int size)

Description copied from interface: TargetPosition

Insures this position's item index is between 0 and size

Specified by:

clamp in interface TargetPosition

clamp

static int clamp(int idx,
 int size)