4de0a99b3f
The ShaderMask widget enables rendering its child with an alpha channel defined by a Shader. For example if the Shader was a linear gradient in alpha then the component behind the ShaderMask's child would appear wherever the gradient's alpha value was not fully opaque. The card_collection.dart example demonstrates this. Select the "Let the sun shine" checkbox in the app's drawer.
28 lines
671 B
Dart
28 lines
671 B
Dart
import 'dart:sky' as sky;
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import 'package:sky/painting.dart';
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import 'package:sky/widgets.dart';
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import 'package:test/test.dart';
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import 'widget_tester.dart';
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sky.Shader createShader(Rect bounds) {
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return new LinearGradient(
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begin: Point.origin,
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end: new Point(0.0, bounds.height),
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colors: [const Color(0x00FFFFFF), const Color(0xFFFFFFFF)],
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stops: [0.1, 0.35]
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)
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.createShader();
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}
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void main() {
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test('Can be constructed', () {
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testWidgets((WidgetTester tester) {
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Widget child = new Container(width: 100.0, height: 100.0);
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tester.pumpWidget(new ShaderMask(child: child, shaderCallback: createShader));
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});
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});
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}
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