draw_text

https://github.com/kyorohiro/hello_skyengine/tree/master/draw_text

// following code is checked in 2016/01/13
import 'package:flutter/widgets.dart';
import 'package:flutter/painting.dart';
import 'package:flutter/rendering.dart';
import 'dart:ui' as sky;
void main() {
runApp(new DrawTextWidget());
}
class DrawTextWidget extends OneChildRenderObjectWidget {
RenderObject createRenderObject() {
return new DrawTextObject();
}
}
class DrawTextObject extends RenderBox {
void paint(PaintingContext context, Offset offset) {
Color textColor = const Color.fromARGB(0xaa, 0xff, 0, 0);
PlainTextSpan textSpan = new PlainTextSpan("Hello Text!! こんにちは!!");
TextStyle textStyle = new TextStyle(fontSize: 50.0, color: textColor);
StyledTextSpan testStyledSpan = new StyledTextSpan(textStyle, [textSpan]);
TextPainter textPainter = new TextPainter(testStyledSpan);
textPainter.maxWidth = 200.0; //constraints.maxWidth;
textPainter.minWidth = 200.0; //constraints.minWidth;
textPainter.minHeight = constraints.minHeight;
textPainter.maxHeight = constraints.maxHeight;
textPainter.layout();
textPainter.paint(context.canvas, new sky.Offset(100.0, 100.0));
}
}