Package org.luwrain.controls

Interface ListArea.Transition

All Known Implementing Classes:

ListUtils.DefaultTransition, ListUtils.DoubleLevelTransition, WebSearchPopup.Transition

Enclosing class:

ListArea<E>

public static interface ListArea.Transition

Defines how the hot point moves in response to navigation commands (arrow keys, page up/down, home/end). The transition logic can be customised by providing a different implementation.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static final class	ListArea.Transition.State	Represents a possible state of the hot point: on an empty line (top or bottom), on a specific item index, or no transition possible.
static enum	ListArea.Transition.Type	Types of navigation actions.

Method Summary

Modifier and Type	Method	Description
ListArea.Transition.State	transition(ListArea.Transition.Type type, ListArea.Transition.State fromState, int itemCount, boolean hasEmptyLineTop, boolean hasEmptyLineBottom)	Computes the new state after a navigation action.

Method Details

transition

ListArea.Transition.State transition(ListArea.Transition.Type type,
 ListArea.Transition.State fromState,
 int itemCount,
 boolean hasEmptyLineTop,
 boolean hasEmptyLineBottom)

Computes the new state after a navigation action.

Parameters:

type - the type of navigation action

fromState - the current state of the hot point

itemCount - the total number of items in the model

hasEmptyLineTop - whether the list has a top empty line

hasEmptyLineBottom - whether the list has a bottom empty line

Returns:

the new state after the transition; never null