Package org.openstreetmap.josm.gui.layer

Interface LayerPositionStrategy

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface LayerPositionStrategy

This class defines a position to insert a given layer in the list of layers.

Since:

10008, 10592 functional interface

Field Summary

Fields

Modifier and Type	Field	Description
static LayerPositionStrategy	AFTER_LAST_DATA_LAYER	A GPX layer is added below the lowest data layer.
static LayerPositionStrategy	AFTER_LAST_VALIDATION_LAYER	A normal layer is added after all validation layers.
static LayerPositionStrategy	BEFORE_FIRST_BACKGROUND_LAYER	The default for background layers: They are added before the first background layer in the list.
static LayerPositionStrategy	IN_FRONT	always inserts at the front of the stack.

Method Summary

Modifier and Type	Method	Description
static LayerPositionStrategy	afterLast(java.util.function.Predicate<Layer> what)	Creates a strategy that places the layer after the last layer of a given kind or at the beginning of the list if no such layer exists.
int	getPosition(LayerManager manager)	Gets the position where the layer should be inserted
static LayerPositionStrategy	inFrontOf(Layer other)	Gets a LayerPositionStrategy that inserts this layer in front of a given layer
static LayerPositionStrategy	inFrontOfFirst(java.util.function.Predicate<Layer> what)	Gets a LayerPositionStrategy that inserts the layer in front of the first layer that matches a condition.

Field Detail

IN_FRONT

static final LayerPositionStrategy IN_FRONT

always inserts at the front of the stack.

AFTER_LAST_DATA_LAYER

static final LayerPositionStrategy AFTER_LAST_DATA_LAYER

A GPX layer is added below the lowest data layer.

AFTER_LAST_VALIDATION_LAYER

static final LayerPositionStrategy AFTER_LAST_VALIDATION_LAYER

A normal layer is added after all validation layers.

BEFORE_FIRST_BACKGROUND_LAYER

static final LayerPositionStrategy BEFORE_FIRST_BACKGROUND_LAYER

The default for background layers: They are added before the first background layer in the list. If there is none, they are added at the end of the list.

Method Detail

inFrontOf

static LayerPositionStrategy inFrontOf(Layer other)

Gets a LayerPositionStrategy that inserts this layer in front of a given layer

Parameters:

other - The layer before which to insert this layer

Returns:

The strategy

inFrontOfFirst

static LayerPositionStrategy inFrontOfFirst(java.util.function.Predicate<Layer> what)

Gets a LayerPositionStrategy that inserts the layer in front of the first layer that matches a condition.

Parameters:

what - The condition to match.

Returns:

The strategy.

afterLast

static LayerPositionStrategy afterLast(java.util.function.Predicate<Layer> what)

Creates a strategy that places the layer after the last layer of a given kind or at the beginning of the list if no such layer exists.

Parameters:

what - what to search for

Returns:

The strategy.

getPosition

int getPosition(LayerManager manager)

Gets the position where the layer should be inserted

Parameters:

manager - The layer manager to insert the layer in.

Returns:

The position in the range 0...layers.size