Package playn.scene

Class ImageLayer

java.lang.Object

playn.scene.Layer

playn.scene.ImageLayer

Direct Known Subclasses:

CanvasLayer

public class ImageLayer
extends Layer

A layer that displays a texture or region of a texture (tile). By default, the layer is the same size as its source, but its size can be changed from that default and the layer will either scale or repeat the texture to cause it to fill its bounds depending on the Texture it renders.

Nested Class Summary

Nested classes/interfaces inherited from interface react.Closeable

react.Closeable.Set, react.Closeable.Util

Nested classes/interfaces inherited from class playn.scene.Layer

Layer.HitTester, Layer.Origin, Layer.State, Layer.Visitor

Field Summary

Fields

Modifier and Type	Field	Description
float	forceHeight	An explicit width and height for this layer.
float	forceWidth	An explicit width and height for this layer.
pythagoras.f.Rectangle	region	The subregion of the tile to render.

Fields inherited from class playn.scene.Layer

DEBUG_RECTS, state

Constructor Summary

Constructors

Constructor	Description
ImageLayer()	Creates a texture layer with no texture.
ImageLayer(playn.core.Tile tile)	Creates an image layer with the supplied texture tile.
ImageLayer(playn.core.TileSource source)	Obtains the tile from source, asynchronously if necessary, and displays it.

Method Summary

Modifier and Type	Method	Description
void	close()	Disposes this layer, removing it from its parent layer.
float	height()	Returns the height of this layer.
ImageLayer	setRegion(pythagoras.f.Rectangle region)	Sets region.
ImageLayer	setSize(float width, float height)	Sets forceWidth and forceHeight.
ImageLayer	setSize(pythagoras.f.IDimension size)	Sets forceWidth and forceHeight.
ImageLayer	setSource(playn.core.TileSource source)	Sets the texture rendered by this layer to the texture provided by source.
ImageLayer	setTile(playn.core.Tile tile)	Sets the texture rendered by this layer.
ImageLayer	setTile(react.RFuture<? extends playn.core.Tile> tile)	Sets the tile rendered by this layer to the asynchronous result of tile.
playn.core.Tile	tile()	Returns the tile rendered by this layer.
float	width()	Returns the width of this layer.

Methods inherited from class playn.scene.Layer

absorbHits, alpha, debugPrint, depth, disposed, events, hasEventListeners, hitTest, hitTestDefault, interactive, name, onAdded, onDisposed, onRemoved, origin, origin, originX, originY, paint, parent, rotation, scale, scaledHeight, scaledWidth, scaleX, scaleY, setAlpha, setBatch, setDepth, setHitTester, setInteractive, setName, setOrigin, setOrigin, setRotation, setScale, setScale, setScaleX, setScaleY, setTint, setTranslation, setTranslation, setTx, setTy, setVisible, tint, toString, transform, translation, translation, tx, ty, visible, visit

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

forceWidth

public float forceWidth

An explicit width and height for this layer. If the width or height exceeds the underlying tile width or height, it will be scaled or repeated depending on the tile texture's repeat configuration in the pertinent axis. If either value is < 0 that indicates that the size of the tile being rendered should be used.

Note: if you use these sizes in conjunction with a logical origin, you must set them via setSize(float, float) to cause the origin to be recomputed.

forceHeight

public float forceHeight

An explicit width and height for this layer. If the width or height exceeds the underlying tile width or height, it will be scaled or repeated depending on the tile texture's repeat configuration in the pertinent axis. If either value is < 0 that indicates that the size of the tile being rendered should be used.

Note: if you use these sizes in conjunction with a logical origin, you must set them via setSize(float, float) to cause the origin to be recomputed.

region

public pythagoras.f.Rectangle region

The subregion of the tile to render. If this is null (the default) the entire tile is rendered. If forceWidth or forceHeight are not set, the width and height of this image layer will be the width and height of the supplied region.

Note: when a subregion is configured, a texture will always be scaled, never repeated. If you want to repeat a texture, you have to use the whole texture. This is a limitation of OpenGL.

Note: if you use this region in conjunction with a logical origin, you must set it via setRegion(pythagoras.f.Rectangle) to cause the origin to be recomputed.

Constructor Detail

ImageLayer

public ImageLayer(playn.core.Tile tile)

Creates an image layer with the supplied texture tile.

ImageLayer

public ImageLayer(playn.core.TileSource source)

Obtains the tile from source, asynchronously if necessary, and displays it. If the source is not ready, this layer will display nothing until it becomes ready and delivers its tile.

ImageLayer

public ImageLayer()

Creates a texture layer with no texture. It will be invisible until a texture is set into it.

Method Detail

tile

public playn.core.Tile tile()

Returns the tile rendered by this layer.

setTile

public ImageLayer setTile(playn.core.Tile tile)

Sets the texture rendered by this layer. One can supplied null to release and clear any texture currently being rendered and leave this layer in an uninitialized state. This isn't something one would normally do, but could be useful if one was free-listing image layers for some reason.

setSource

public ImageLayer setSource(playn.core.TileSource source)

Sets the texture rendered by this layer to the texture provided by source. If source is not yet ready, the texture will be set when it becomes ready. Until then any previous texture will continue to be displayed.

setTile

public ImageLayer setTile(react.RFuture<? extends playn.core.Tile> tile)

Sets the tile rendered by this layer to the asynchronous result of tile. When the future completes, this layer's tile will be set. Until then, the current tile (if any) will continue to be rendered.

setSize

public ImageLayer setSize(float width,
                          float height)

Sets forceWidth and forceHeight.

Returns:

this, for convenient call chaining.

setSize

public ImageLayer setSize(pythagoras.f.IDimension size)

Sets forceWidth and forceHeight.

Returns:

this, for convenient call chaining.

setRegion

public ImageLayer setRegion(pythagoras.f.Rectangle region)

Sets region.

Returns:

this, for convenient call chaining.

width

public float width()

Description copied from class: Layer

Returns the width of this layer. Note: not all layers know their size. Those that don't return 0.

Overrides:

width in class Layer

height

public float height()

Description copied from class: Layer

Returns the height of this layer. Note: not all layers know their size. Those that don't return 0.

Overrides:

height in class Layer

close

public void close()

Description copied from class: Layer

Disposes this layer, removing it from its parent layer. Any resources associated with this layer are freed, and it cannot be reused after being disposed. Disposing a layer that has children will dispose them as well.

Overrides:

close in class Layer