Interface TargetPosition

All Known Implementing Classes:

EndOffEnd, MinDistanceTo, StartOffStart

interface TargetPosition

Defines where the Navigator should place the anchor cell's node in the viewport. Its three implementations are StartOffStart, EndOffEnd, and MinDistanceTo.

Field Summary

Fields

Modifier and Type	Field	Description
static final TargetPosition	BEGINNING

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
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.

Field Details

BEGINNING

static final TargetPosition BEGINNING

Method Details

transformByChange

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.

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

TargetPosition scrollBy(double delta)

accept

void accept(TargetPositionVisitor visitor)

Visitor Pattern: prevents type-checking the implementation

clamp

TargetPosition clamp(int size)

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