Class: Layer

Layer()

new Layer()

Layer Layerとは一番基本のレイヤの機能が付いてます、おおむねレンダリング用です。 ImageLayerとMessageLayerはこれをprototypeにしてます。 Layerのレンダリング構造は以下通りです： 何かを描画する：
  1. まずはDrawableオブジェクトを準備して、Layer.childrenに追加します。
  2. Layer.draw( drawable )をしてます、Layerはすぐ描画するではなく「このDrawableをあとで描画する」と記録します
何かを消す：
  1. Layer.childrenから消したい物を削除する。
  2. Layer.redrawRect( rect )をする。Layerはすぐクリアするのではなく、「このエリアをあとでクリアします」と記録します。
最後、animatorはLayer.flush()をします。 flushとは、記録した「描画すること」と「エリアをクリアとこ」を合わせて、最低限度のredrawをします。 Layer.redrawRectはエリアをクリアするよりも、このエリアを再描画するという意味です。 だからボタンの下に文字がある場合、ボタンを削除してredrawRectしても文字は残ります。
Implements:

Extends

Members

(readonly) canvas

Properties:
Name Type Description
canvas Canvas

(readonly) ctx

Properties:
Name Type Description
ctx CanvasRenderingContext2D

(constant) initializer :string

The name of constructor the class, will be used to restore the object. The constructor has to be accessable via 
window[initializer]
Type:
  • string
Overrides:
Implements:

needRedraw

Properties:
Type Description
boolean
Inherited From:

partialDraw

Properties:
Type Description
boolean
Inherited From:

rect

Properties:
Type Description
Rect
Overrides:

Methods

canDrawPartial() → {boolean}

Can it draw only a certain part? If yes, drawContext will be called with rect, and drawable should draw only in that rect. Drawing less = better performance.
Inherited From:
Returns:
Type
boolean

children() → {Array.<Drawable>}

Drawable to be draw in the layer
Returns:
Type
Array.<Drawable>

draw(drawable)

Parameters:
Name Type Description
drawable Drawable The drawable to redraw, it has to be one of the children.

drawOnContext(context, rect)

Draw on this context. If canDrawPartial is true, this can be called with rect. When it is called with rect, drawable should only draw in the specificed area.
Parameters:
Name Type Description
context CanvasRenderingContext2D
rect Rect In the context's coordinate.
Overrides:

flush() → {boolean}

Returns:
trueならredrawしています、falseならしていない
Type
boolean

frame() → {Rect}

Return the frame, which is the actually area this drawable draws on (including things like shadow). Subclass should override if needed.
Inherited From:
Returns:
Type
Rect

getCorrespondingLayer() → {Layer}

Get the fore / back corresponding layer
Returns:
Type
Layer

mousedown() → {boolean}

Return true if this layer handled the event, otherwise the event will passed to the next layer.
Returns:
Type
boolean

mousemove() → {boolean}

Return true if this layer handled the event, otherwise the event will passed to the next layer.
Returns:
Type
boolean

mouseup() → {boolean}

Return true if this layer handled the event, otherwise the event will passed to the next layer.
Returns:
Type
boolean

objectToBeSerialized(key) → {object|Serializable}

Return an object to be serialized for a specific key.
Parameters:
Name Type Description
key string The key of property to be serialized
Overrides:
Implements:
Returns:
- An object or serializable to be saved for the specific key, return undefined = not to be saved.
Type
object | Serializable

redrawRect(rect)

Parameters:
Name Type Description
rect Rect Redraw a rect within the layer

setRect(rect)

Parameters:
Name Type Description
rect Rect