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a94999ba50
Each layer is supposed to reexport the parts of the previous layer that are part of its API. - In painting.dart, export from dart:ui all the Canvas-related APIs that make sense to be used at higher levels, e.g. PaintingStyle. - Delete painting/shadows.dart. It was dead code. - In rendering/object.dart, export all of painting.dart. - In widgets/basic.dart, export all of painting.dart and animation.dart. Some classes in animation/ are renamed to make this less disruptive and confusing to the namespace. - Split out Stocks back into an import model rather than a part model, so that it's easier to manage its dependencies on a per-file basis. - Move Ticker to scheduler library. - Remove as many redundant imports as possible now. - Some minor nit picking cleanup in various files.
103 lines
2.7 KiB
Dart
103 lines
2.7 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/rendering.dart';
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class _BaselinePainter extends CustomPainter {
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const _BaselinePainter({
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this.paragraph
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});
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final RenderParagraph paragraph;
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void paint(Canvas canvas, Size size) {
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double baseline = paragraph.getDistanceToBaseline(TextBaseline.alphabetic);
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double w = paragraph.getMaxIntrinsicWidth(new BoxConstraints.loose(size));
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double h = paragraph.getMaxIntrinsicHeight(new BoxConstraints.loose(size));
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Path path;
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Paint paint;
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// top and bottom
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path = new Path();
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path.moveTo(0.0, 0.0);
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path.lineTo(w, 0.0);
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path.moveTo(0.0, h);
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path.lineTo(w, h);
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paint = new Paint()
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..color = const Color(0xFFFF9000)
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..style = PaintingStyle.stroke
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..strokeWidth = 1.5;
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canvas.drawPath(path, paint);
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// baseline
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path = new Path();
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path.moveTo(0.0, baseline);
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path.lineTo(w, baseline);
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paint = new Paint()
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..color = const Color(0xFF00FF90)
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..style = PaintingStyle.stroke
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..strokeWidth = 1.5;
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canvas.drawPath(path, paint);
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}
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// TODO(abarth): We have no good way of detecting when the paragraph's intrinsic dimensions change.
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bool shouldRepaint(_BaselinePainter oldPainter) => true;
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}
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RenderBox getBox(double lh) {
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RenderParagraph paragraph = new RenderParagraph(
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new StyledTextSpan(
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new TextStyle(
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color: const Color(0xFF0000A0)
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),
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<TextSpan>[
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new PlainTextSpan('test'),
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new StyledTextSpan(
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new TextStyle(
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fontFamily: 'serif',
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fontSize: 50.0,
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height: lh
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),
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<TextSpan>[new PlainTextSpan('مرحبا Hello')]
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)
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]
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)
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);
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return new RenderPadding(
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padding: new EdgeDims.all(10.0),
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child: new RenderConstrainedBox(
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additionalConstraints: new BoxConstraints.tightFor(height: 200.0),
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child: new RenderDecoratedBox(
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decoration: new BoxDecoration(
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backgroundColor: const Color(0xFFFFFFFF)
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),
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child: new RenderPadding(
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padding: new EdgeDims.all(10.0),
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child: new RenderCustomPaint(
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painter: new _BaselinePainter(
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paragraph: paragraph
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),
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child: paragraph
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)
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)
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)
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)
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);
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}
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void main() {
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RenderBox root = new RenderFlex(children: <RenderBox>[
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new RenderConstrainedBox(
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additionalConstraints: new BoxConstraints.tightFor(height: 50.0)
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),
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getBox(null),
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getBox(1.2),
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],
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direction: FlexDirection.vertical,
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alignItems: FlexAlignItems.stretch
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);
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new RenderingFlutterBinding(root: root);
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}
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