Move sky/examples to sky/sdk/lib/example, and code changes to support that change. Fixes T277.

sky/examples/game/lib/sprite.dart

Index: sky/examples/game/lib/sprite.dart
diff --git a/sky/examples/game/lib/sprite.dart b/sky/examples/game/lib/sprite.dart
deleted file mode 100644
index 6202e20e30b4abced89a1f19f36f9fe7311b3145..0000000000000000000000000000000000000000
--- a/sky/examples/game/lib/sprite.dart
+++ /dev/null
@@ -1,129 +0,0 @@
-part of sprites;
-
-/// A Sprite is a [Node] that renders a bitmap image to the screen.
-class Sprite extends NodeWithSize {
-
-  /// The texture that the sprite will render to screen.
-  ///
-  /// If the texture is null, the sprite will be rendered as a red square
-  /// marking the bounds of the sprite.
-  ///
-  ///     mySprite.texture = myTexture;
-  Texture texture;
-
-  /// If true, constrains the proportions of the image by scaling it down, if its proportions doesn't match the [size].
-  ///
-  ///     mySprite.constrainProportions = true;
-  bool constrainProportions = false;
-  double _opacity = 1.0;
-
-  /// The color to draw on top of the sprite, null if no color overlay is used.
-  ///
-  ///     // Color the sprite red
-  ///     mySprite.colorOverlay = new Color(0x77ff0000);
-  Color colorOverlay;
-
-  /// The transfer mode used when drawing the sprite to screen.
-  ///
-  ///     // Add the colors of the sprite with the colors of the background
-  ///     mySprite.transferMode = TransferMode.plusMode;
-  TransferMode transferMode;
-
-  /// Creates a new sprite from the provided [texture].
-  ///
-  ///     var mySprite = new Sprite(myTexture)
-  Sprite([this.texture]) {
-    if (texture != null) {
-      size = texture.size;
-      pivot = texture.pivot;
-    } else {
-      pivot = new Point(0.5, 0.5);
-    }
-  }
-
-  /// Creates a new sprite from the provided [image].
-  ///
-  /// var mySprite = new Sprite.fromImage(myImage);
-  Sprite.fromImage(Image image) {
-    assert(image != null);
-
-    texture = new Texture(image);
-    size = texture.size;
-
-    pivot = new Point(0.5, 0.5);
-  }
-
-  /// The opacity of the sprite in the range 0.0 to 1.0.
-  ///
-  ///     mySprite.opacity = 0.5;
-  double get opacity => _opacity;
-
-  void set opacity(double opacity) {
-    assert(opacity != null);
-    assert(opacity >= 0.0 && opacity <= 1.0);
-    _opacity = opacity;
-  }
-
-  void paint(RenderCanvas canvas) {
-    canvas.save();
-
-    // Account for pivot point
-    applyTransformForPivot(canvas);
-
-    if (texture != null) {
-      double w = texture.size.width;
-      double h = texture.size.height;
-
-      if (w <= 0 || h <= 0) return;
-      
-      double scaleX = size.width / w;
-      double scaleY = size.height / h;
-      
-      if (constrainProportions) {
-        // Constrain proportions, using the smallest scale and by centering the image
-        if (scaleX < scaleY) {
-          canvas.translate(0.0, (size.height - scaleX * h) / 2.0);
-          scaleY = scaleX;
-        } else {
-          canvas.translate((size.width - scaleY * w) / 2.0, 0.0);
-          scaleX = scaleY;
-        }
-      }
-      
-      canvas.scale(scaleX, scaleY);
-
-      // Setup paint object for opacity and transfer mode
-      Paint paint = new Paint();
-      paint.color = new Color.fromARGB((255.0*_opacity).toInt(), 255, 255, 255);
-      if (colorOverlay != null) {
-        paint.setColorFilter(new ColorFilter.mode(colorOverlay, TransferMode.srcATop));
-      }
-      if (transferMode != null) {
-        paint.setTransferMode(transferMode);
-      }
-
-      // Do actual drawing of the sprite
-      if (texture.rotated) {
-        // Calculate the rotated frame and spriteSourceSize
-        Size originalFrameSize = texture.frame.size;
-        Rect rotatedFrame = new Rect.fromPointAndSize(texture.frame.upperLeft, new Size(originalFrameSize.height, originalFrameSize.width));
-        Point rotatedSpriteSourcePoint = new Point(
-            -texture.spriteSourceSize.top - (texture.spriteSourceSize.bottom - texture.spriteSourceSize.top),
-            texture.spriteSourceSize.left);
-        Rect rotatedSpriteSourceSize = new Rect.fromPointAndSize(rotatedSpriteSourcePoint, new Size(originalFrameSize.height, originalFrameSize.width));
-
-        // Draw the rotated sprite
-        canvas.rotate(-Math.PI/2.0);
-        canvas.drawImageRect(texture.image, rotatedFrame, rotatedSpriteSourceSize, paint);
-      } else {
-        // Draw the sprite
-        canvas.drawImageRect(texture.image, texture.frame, texture.spriteSourceSize, paint);
-      }
-    } else {
-      // Paint a red square for missing texture
-      canvas.drawRect(new Rect.fromLTRB(0.0, 0.0, size.width, size.height),
-      new Paint()..color = const Color.fromARGB(255, 255, 0, 0));
-    }
-    canvas.restore();
-  }
-}