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Actually perform a block layout

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This CL teaches simple_render_tree how to do a block layout using layout2.dart.

R=eseidel@chromium.org, ianh@google.com

Review URL: https://codereview.chromium.org/1144423002
This commit is contained in:
Adam Barth 2015-05-21 11:15:50 -07:00
parent 3a6cab2c40
commit 400d6df700
1 changed files with 19 additions and 6 deletions
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25
examples/raw/simple_render_tree.dart
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@ -6,16 +6,29 @@ import 'dart:math';
import 'dart:sky';
import 'package:sky/framework/layout2.dart';
class RenderBlueCircle extends RenderBox {
void paint(RenderNodeDisplayList canvas) {
double radius = min(width, height) * 0.45;
Paint paint = new Paint()..setARGB(255, 0, 255, 255);
canvas.drawCircle(width / 2, height / 2, radius, paint);
class RenderSolidColor extends RenderDecoratedBox {
RenderSolidColor(int backgroundColor)
: super(new BoxDecoration(backgroundColor: backgroundColor));
BoxDimensions getIntrinsicDimensions(BoxConstraints constraints) {
return new BoxDimensions.withConstraints(constraints, height: 200.0);
}
void layout(BoxConstraints constraints, { RenderNode relayoutSubtreeRoot }) {
setWidth(constraints, constraints.maxWidth);
setHeight(constraints, 200.0);
layoutDone();
}
}
void main() {
RenderView renderView = new RenderView(root: new RenderBlueCircle());
var root = new RenderBlock(
decoration: new BoxDecoration(backgroundColor: 0xFF00FFFF));
root.add(new RenderSolidColor(0xFF00FF00));
root.add(new RenderSolidColor(0xFF0000FF));
RenderView renderView = new RenderView(root: root);
renderView.layout(newWidth: view.width, newHeight: view.height);
renderView.paintFrame();
}