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2b126bcd0d
Unlike FractionalOffset, Alignment uses the center as the zero of the coordinate system, which makes the RTL math work out much cleaner. Also, make FractionalOffset into a subclass of Alignment so that clients can continue to use FractionalOffset.
58 lines
1.7 KiB
Dart
58 lines
1.7 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/material.dart';
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import 'package:flutter/rendering.dart';
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import 'package:test/test.dart';
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import 'rendering_tester.dart';
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void main() {
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test('overflow should not affect baseline', () {
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RenderBox root, child, text;
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double baseline1, baseline2, height1, height2;
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root = new RenderPositionedBox(
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child: new RenderCustomPaint(
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child: child = text = new RenderParagraph(
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const TextSpan(text: 'Hello World'),
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textDirection: TextDirection.ltr,
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),
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painter: new TestCallbackPainter(
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onPaint: () {
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baseline1 = child.getDistanceToBaseline(TextBaseline.alphabetic);
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height1 = text.size.height;
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},
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),
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),
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);
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layout(root, phase: EnginePhase.paint);
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root = new RenderPositionedBox(
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child: new RenderCustomPaint(
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child: child = new RenderConstrainedOverflowBox(
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child: text = new RenderParagraph(
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const TextSpan(text: 'Hello World'),
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textDirection: TextDirection.ltr,
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),
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maxHeight: height1 / 2.0,
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alignment: Alignment.topLeft,
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),
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painter: new TestCallbackPainter(
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onPaint: () {
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baseline2 = child.getDistanceToBaseline(TextBaseline.alphabetic);
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height2 = text.size.height;
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},
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),
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),
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);
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layout(root, phase: EnginePhase.paint);
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expect(baseline1, lessThan(height1));
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expect(height2, equals(height1 / 2.0));
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expect(baseline2, equals(baseline1));
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expect(baseline2, greaterThan(height2));
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});
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}
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