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46a178dce6
This patch make grid layout much more flexible. The behavior is factored out into a GridDelegate that's modeled after the custom layout delegates. The patch includes a MaxTileWidthGridDelegate that implements the old behavior and a FixedColumnCountGridDelegate that implements a grid layout with a fixed number of columns. Fixes #1048
30 lines
883 B
Dart
30 lines
883 B
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:math' as math;
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import 'package:flutter/material.dart';
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import 'package:flutter/rendering.dart';
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import 'lib/solid_color_box.dart';
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Color randomColor() {
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final List<Color> allColors = [
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Colors.blue,
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Colors.indigo
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].map((p) => p.values).fold([], (a, b) => a..addAll(b));
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final random = new math.Random();
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return allColors[random.nextInt(allColors.length)];
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}
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RenderBox buildGridExample() {
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List<RenderBox> children = new List<RenderBox>.generate(30, (_) => new RenderSolidColorBox(randomColor()));
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return new RenderGrid(
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children: children,
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delegate: new MaxTileWidthGridDelegate(maxTileWidth: 100.0)
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);
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}
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main() => new RenderingFlutterBinding(root: buildGridExample());
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