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50bfdedbf4
Sadly, box.dart has grown much longer than 1000 lines. This patch splits it up into several files based on the class hierarchy. Fortunately, many of these classes are loosely coupled to each other.
67 lines
2.4 KiB
Dart
67 lines
2.4 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 'dart:sky';
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import 'package:cassowary/cassowary.dart' as al;
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import 'package:sky/rendering/auto_layout.dart';
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import 'package:sky/rendering/object.dart';
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import 'package:sky/rendering/proxy_box.dart';
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import 'package:sky/rendering/sky_binding.dart';
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void main() {
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RenderDecoratedBox c1 = new RenderDecoratedBox(
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decoration: new BoxDecoration(backgroundColor: const Color(0xFFFF0000))
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);
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RenderDecoratedBox c2 = new RenderDecoratedBox(
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decoration: new BoxDecoration(backgroundColor: const Color(0xFF00FF00))
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);
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RenderDecoratedBox c3 = new RenderDecoratedBox(
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decoration: new BoxDecoration(backgroundColor: const Color(0xFF0000FF))
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);
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RenderDecoratedBox c4 = new RenderDecoratedBox(
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decoration: new BoxDecoration(backgroundColor: const Color(0xFFFFFFFF))
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);
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RenderAutoLayout root = new RenderAutoLayout(children: [c1, c2, c3, c4]);
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AutoLayoutParentData p1 = c1.parentData;
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AutoLayoutParentData p2 = c2.parentData;
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AutoLayoutParentData p3 = c3.parentData;
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AutoLayoutParentData p4 = c4.parentData;
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root.addConstraints(<al.Constraint>[
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// Sum of widths of each box must be equal to that of the container
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(p1.width + p2.width + p3.width == root.width) as al.Constraint,
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// The boxes must be stacked left to right
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p1.rightEdge <= p2.leftEdge,
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p2.rightEdge <= p3.leftEdge,
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// The widths of the first and the third boxes should be equal
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(p1.width == p3.width) as al.Constraint,
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// The width of the second box should be twice as much as that of the first
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// and third
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(p2.width * al.cm(2.0) == p1.width) as al.Constraint,
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// The height of the three boxes should be equal to that of the container
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(p1.height == p2.height) as al.Constraint,
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(p2.height == p3.height) as al.Constraint,
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(p3.height == root.height) as al.Constraint,
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// The fourth box should be half as wide as the second and must be attached
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// to the right edge of the same (by its center)
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(p4.width == p2.width / al.cm(2.0)) as al.Constraint,
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(p4.height == al.cm(50.0)) as al.Constraint,
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(p4.horizontalCenter == p2.rightEdge) as al.Constraint,
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(p4.verticalCenter == p2.height / al.cm(2.0)) as al.Constraint,
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]);
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new SkyBinding(root: root);
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}
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