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

sky/examples/raw/painting.dart

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'dart:sky' as sky;
-import 'dart:math' as math;
-import 'dart:typed_data';
-
-void beginFrame(double timeStamp) {
-  sky.PictureRecorder recorder = new sky.PictureRecorder();
-  Canvas canvas = new Canvas(recorder, sky.view.width, 200.0);
-
-  sky.Paint paint = new sky.Paint();
-  sky.Point mid = new sky.Point(sky.view.width / 2.0, sky.view.height / 2.0);
-  double radius = math.min(mid.x, mid.y);
-
-  canvas.drawPaint(new sky.Paint()..color = const sky.Color(0xFFFFFFFF));
-
-  canvas.save();
-
-  canvas.translate(-mid.x/2.0, sky.view.height*2.0);
-  canvas.clipRect(
-      new sky.Rect.fromLTRB(0.0, -sky.view.height, sky.view.width, radius));
-
-  canvas.translate(mid.x, mid.y);
-  paint.color = const sky.Color.fromARGB(128, 255, 0, 255);
-  canvas.rotate(math.PI/4.0);
-
-  sky.Gradient yellowBlue = new sky.Gradient.linear(
-      [new sky.Point(-radius, -radius), new sky.Point(0.0, 0.0)],
-      [const sky.Color(0xFFFFFF00), const sky.Color(0xFF0000FF)]);
-  canvas.drawRect(new sky.Rect.fromLTRB(-radius, -radius, radius, radius),
-                   new sky.Paint()..setShader(yellowBlue));
-
-  // Scale x and y by 0.5.
-  var scaleMatrix = new Float32List.fromList([
-      0.5, 0.0, 0.0, 0.0,
-      0.0, 0.5, 0.0, 0.0,
-      0.0, 0.0, 0.0, 0.0,
-      0.0, 0.0, 0.0, 1.0,
-  ]);
-  canvas.concat(scaleMatrix);
-  paint.color = const sky.Color.fromARGB(128, 0, 255, 0);
-  canvas.drawCircle(0.0, 0.0, radius, paint);
-
-  canvas.restore();
-
-  canvas.translate(0.0, 50.0);
-  var builder = new sky.LayerDrawLooperBuilder()
-      ..addLayerOnTop(
-          new sky.DrawLooperLayerInfo()
-            ..setOffset(const sky.Point(150.0, 0.0))
-            ..setColorMode(sky.TransferMode.src)
-            ..setPaintBits(sky.PaintBits.all),
-          (sky.Paint layerPaint) {
-        layerPaint.color = const sky.Color.fromARGB(128, 255, 255, 0);
-        layerPaint.setColorFilter(new sky.ColorFilter.mode(
-            const sky.Color.fromARGB(128, 0, 0, 255), sky.TransferMode.srcIn));
-        layerPaint.setMaskFilter(new sky.MaskFilter.blur(
-            sky.BlurStyle.normal, 3.0, highQuality: true));
-      })
-      ..addLayerOnTop(
-          new sky.DrawLooperLayerInfo()
-            ..setOffset(const sky.Point(75.0, 75.0))
-            ..setColorMode(sky.TransferMode.src)
-            ..setPaintBits(sky.PaintBits.shader),
-          (sky.Paint layerPaint) {
-        sky.Gradient redYellow = new sky.Gradient.radial(
-            new sky.Point(0.0, 0.0), radius/3.0,
-            [const sky.Color(0xFFFFFF00), const sky.Color(0xFFFF0000)],
-            null, sky.TileMode.mirror);
-        layerPaint.setShader(redYellow);
-        // Since we're don't set sky.PaintBits.maskFilter, this has no effect.
-        layerPaint.setMaskFilter(new sky.MaskFilter.blur(
-            sky.BlurStyle.normal, 50.0, highQuality: true));
-      })
-      ..addLayerOnTop(
-          new sky.DrawLooperLayerInfo()..setOffset(const sky.Point(225.0, 75.0)),
-          (sky.Paint layerPaint) {
-        // Since this layer uses a DST color mode, this has no effect.
-        layerPaint.color = const sky.Color.fromARGB(128, 255, 0, 0);
-      });
-  paint.setDrawLooper(builder.build());
-  canvas.drawCircle(0.0, 0.0, radius, paint);
-
-  sky.view.picture = recorder.endRecording();
-}
-
-void main() {
-  sky.view.setBeginFrameCallback(beginFrame);
-  sky.view.scheduleFrame();
-}