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This patch contains a prototype of a new widget framework. In this framework, Components can be reused in the tree as many times as the author desires. Also, StatefulComponent is split into two pieces, a ComponentConfiguration and a ComponentState. The ComponentConfiguration is created by the author and can be reused as many times as desired. When mounted into the tree, the ComponentConfiguration creates a ComponentState to hold the state for the component. The state remains in the tree and cannot be reused.
58 lines
1.3 KiB
Dart
58 lines
1.3 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:sky/rendering.dart';
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import 'package:sky/src/fn3/framework.dart';
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export 'package:sky/rendering.dart' show
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BackgroundImage,
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BlockDirection,
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Border,
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BorderSide,
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BoxConstraints,
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BoxDecoration,
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BoxDecorationPosition,
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BoxShadow,
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Color,
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EdgeDims,
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EventDisposition,
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FlexAlignItems,
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FlexDirection,
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FlexJustifyContent,
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Offset,
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Paint,
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Path,
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Point,
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Rect,
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ScrollDirection,
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Shape,
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ShrinkWrap,
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Size,
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ValueChanged;
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class DecoratedBox extends OneChildRenderObjectWidget {
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DecoratedBox({
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Key key,
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this.decoration,
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this.position: BoxDecorationPosition.background,
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Widget child
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}) : super(key: key, child: child) {
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assert(decoration != null);
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assert(position != null);
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}
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final BoxDecoration decoration;
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final BoxDecorationPosition position;
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RenderObject createRenderObject() => new RenderDecoratedBox(
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decoration: decoration,
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position: position
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);
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void updateRenderObject(RenderDecoratedBox renderObject) {
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renderObject.decoration = decoration;
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renderObject.position = position;
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}
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}
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