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115 lines
3.3 KiB
Dart
115 lines
3.3 KiB
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 'package:flutter_web_test/flutter_web_test.dart';
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import 'package:flutter_web/widgets.dart';
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import 'package:flutter_web/rendering.dart';
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import 'package:test/test.dart' as test;
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class TestFlowDelegate extends FlowDelegate {
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TestFlowDelegate({this.startOffset}) : super(repaint: startOffset);
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final Animation<double> startOffset;
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@override
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BoxConstraints getConstraintsForChild(int i, BoxConstraints constraints) {
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return constraints.loosen();
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}
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@override
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void paintChildren(FlowPaintingContext context) {
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double dy = startOffset.value;
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for (int i = 0; i < context.childCount; ++i) {
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context.paintChild(i, transform: Matrix4.translationValues(0.0, dy, 0.0));
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dy += 0.75 * context.getChildSize(i).height;
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}
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}
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@override
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bool shouldRepaint(TestFlowDelegate oldDelegate) =>
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startOffset == oldDelegate.startOffset;
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}
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class OpacityFlowDelegate extends FlowDelegate {
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OpacityFlowDelegate(this.opacity);
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double opacity;
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@override
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void paintChildren(FlowPaintingContext context) {
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for (int i = 0; i < context.childCount; ++i) {
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context.paintChild(i, opacity: opacity);
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}
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}
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@override
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bool shouldRepaint(OpacityFlowDelegate oldDelegate) =>
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opacity != oldDelegate.opacity;
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}
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void main() {
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testWidgets('Flow control test', (WidgetTester tester) async {
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final AnimationController startOffset = AnimationController.unbounded(
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vsync: tester,
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);
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final List<int> log = <int>[];
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Widget buildBox(int i) {
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return GestureDetector(
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onTap: () {
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log.add(i);
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},
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child: Container(
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width: 100.0,
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height: 100.0,
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color: const Color(0xFF0000FF),
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child: Text('$i', textDirection: TextDirection.ltr)));
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}
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await tester.pumpWidget(Flow(
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delegate: TestFlowDelegate(startOffset: startOffset),
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children: <Widget>[
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buildBox(0),
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buildBox(1),
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buildBox(2),
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buildBox(3),
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buildBox(4),
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buildBox(5),
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buildBox(6),
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]));
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await tester.tap(find.text('0'));
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expect(log, equals(<int>[0]));
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await tester.tap(find.text('1'));
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expect(log, equals(<int>[0, 1]));
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await tester.tap(find.text('2'));
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expect(log, equals(<int>[0, 1, 2]));
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log.clear();
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await tester.tapAt(const Offset(20.0, 90.0));
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expect(log, equals(<int>[1]));
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startOffset.value = 50.0;
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await tester.pump();
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log.clear();
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await tester.tapAt(const Offset(20.0, 90.0));
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expect(log, equals(<int>[0]));
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});
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testWidgets('Flow opacity layer', (WidgetTester tester) async {
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const double opacity = 0.2;
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await tester.pumpWidget(
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Flow(delegate: OpacityFlowDelegate(opacity), children: <Widget>[
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Container(width: 100.0, height: 100.0),
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]));
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ContainerLayer layer = RendererBinding.instance.renderView.debugLayer;
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while (layer != null && !(layer is OpacityLayer)) layer = layer.firstChild;
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expect(layer, isInstanceOf<OpacityLayer>());
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final OpacityLayer opacityLayer = layer;
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expect(opacityLayer.alpha, equals(opacity * 255));
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expect(layer.firstChild, new test.TypeMatcher<TransformLayer>());
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});
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}
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