The Container Game Object now uses the AlphaSingle component, allowing you to uniformly set the alpha of the container, rather than a quad alpha, which never worked consistently across Container children. Fix phaserjs#4916

Author: photonstorm

src/gameobjects/container/Container.js

@@ -58,7 +58,7 @@ var Vector2 = require('../../math/Vector2');
  * @constructor
  * @since 3.4.0
  *
- * @extends Phaser.GameObjects.Components.Alpha
+ * @extends Phaser.GameObjects.Components.AlphaSingle
  * @extends Phaser.GameObjects.Components.BlendMode
  * @extends Phaser.GameObjects.Components.ComputedSize
  * @extends Phaser.GameObjects.Components.Depth
@@ -76,7 +76,7 @@ var Container = new Class({
     Extends: GameObject,
 
     Mixins: [
-        Components.Alpha,
+        Components.AlphaSingle,
         Components.BlendMode,
         Components.ComputedSize,
         Components.Depth,

src/gameobjects/container/ContainerWebGLRenderer.js

@@ -52,10 +52,7 @@ var ContainerWebGLRenderer = function (renderer, container, interpolationPercent
         renderer.setBlendMode(0);
     }
 
-    var alphaTopLeft = container.alphaTopLeft;
-    var alphaTopRight = container.alphaTopRight;
-    var alphaBottomLeft = container.alphaBottomLeft;
-    var alphaBottomRight = container.alphaBottomRight;
+    var alpha = container.alpha;
 
     var scrollFactorX = container.scrollFactorX;
     var scrollFactorY = container.scrollFactorY;
@@ -123,7 +120,7 @@ var ContainerWebGLRenderer = function (renderer, container, interpolationPercent
         //  Set parent values
         child.setScrollFactor(childScrollFactorX * scrollFactorX, childScrollFactorY * scrollFactorY);
 
-        child.setAlpha(childAlphaTopLeft * alphaTopLeft, childAlphaTopRight * alphaTopRight, childAlphaBottomLeft * alphaBottomLeft, childAlphaBottomRight * alphaBottomRight);
+        child.setAlpha(childAlphaTopLeft * alpha, childAlphaTopRight * alpha, childAlphaBottomLeft * alpha, childAlphaBottomRight * alpha);
 
         //  Render
         child.renderWebGL(renderer, child, interpolationPercentage, camera, transformMatrix);