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This CL makes simple_render_tree.dart interactive by making the hit testing system work. I've also added a mechanism for requesting an animation frame. R=eseidel@chromium.org, ianh@google.com Review URL: https://codereview.chromium.org/1153543002
43 lines
1013 B
Dart
43 lines
1013 B
Dart
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import "dart:math";
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import 'dart:sky';
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Picture draw(int a, int r, int g, int b) {
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double width = view.width;
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double height = view.height;
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PictureRecorder recorder = new PictureRecorder(width, height);
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double radius = min(width, height) * 0.45;
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Paint paint = new Paint()..setARGB(a, r, g, b);
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recorder.drawCircle(width / 2, height / 2, radius, paint);
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return recorder.endRecording();
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}
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bool handleEvent(Event event) {
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if (event.type == "pointerdown") {
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view.picture = draw(255, 0, 0, 255);
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view.scheduleFrame();
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return true;
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}
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if (event.type == "pointerup") {
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view.picture = draw(255, 0, 255, 0);
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view.scheduleFrame();
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return true;
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}
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return false;
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}
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void main() {
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print("Hello, world");
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view.picture = draw(255, 0, 255, 0);
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view.scheduleFrame();
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view.setEventCallback(handleEvent);
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}
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