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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 import "dart:math"; | 5 import "dart:math"; |
6 import 'dart:sky'; | 6 import 'dart:sky'; |
7 | 7 |
8 Picture draw(int a, int r, int g, int b) { | 8 Picture draw(int a, int r, int g, int b) { |
9 double width = view.width; | 9 double width = view.width; |
10 double height = view.height; | 10 double height = view.height; |
11 | 11 |
12 PictureRecorder recorder = new PictureRecorder(width, height); | 12 PictureRecorder recorder = new PictureRecorder(width, height); |
13 double radius = min(width, height) * 0.45; | 13 double radius = min(width, height) * 0.45; |
14 | 14 |
15 Paint paint = new Paint()..color = Color.fromARGB(a, r, g, b); | 15 Paint paint = new Paint()..color = new Color.fromARGB(a, r, g, b); |
16 recorder.drawCircle(width / 2, height / 2, radius, paint); | 16 recorder.drawCircle(width / 2, height / 2, radius, paint); |
17 return recorder.endRecording(); | 17 return recorder.endRecording(); |
18 } | 18 } |
19 | 19 |
20 bool handleEvent(Event event) { | 20 bool handleEvent(Event event) { |
21 if (event.type == "pointerdown") { | 21 if (event.type == "pointerdown") { |
22 view.picture = draw(255, 0, 0, 255); | 22 view.picture = draw(255, 0, 0, 255); |
23 view.scheduleFrame(); | 23 view.scheduleFrame(); |
24 return true; | 24 return true; |
25 } | 25 } |
26 | 26 |
27 if (event.type == "pointerup") { | 27 if (event.type == "pointerup") { |
28 view.picture = draw(255, 0, 255, 0); | 28 view.picture = draw(255, 0, 255, 0); |
29 view.scheduleFrame(); | 29 view.scheduleFrame(); |
30 return true; | 30 return true; |
31 } | 31 } |
32 | 32 |
33 return false; | 33 return false; |
34 } | 34 } |
35 | 35 |
36 void main() { | 36 void main() { |
37 print("Hello, world"); | 37 print("Hello, world"); |
38 view.picture = draw(255, 0, 255, 0); | 38 view.picture = draw(255, 0, 255, 0); |
39 view.scheduleFrame(); | 39 view.scheduleFrame(); |
40 | 40 |
41 view.setEventCallback(handleEvent); | 41 view.setEventCallback(handleEvent); |
42 } | 42 } |
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