RenderBox gives the opportunity to overide paint() method. But how to build() Widget from that RenderBox?
Add a comment
|
1 Answer
Instead of StatefulWidget or StatelessWidget you can subclass SingleChildRenderObjectWidget (or similar)
class MyWidget extends SingleChildRenderObjectWidget {
@override
MyRenderBox createRenderObject(BuildContext context) {
return new MyRenderBox(title: "bar");
}
@override
void updateRenderObject(BuildContext context, MyRenderBox renderObject) {
renderObject.title = "foo";
}
}
class MyRenderBox extends RenderBox {
String title;
MyRenderBox({this.title});
}
A few other interesting subclasses are LeafRenderObjectWidget and MultiChildRenderObjectWidget
3 Comments
Serge Breusov
Still doesn't work... I/flutter ( 601): This RenderObject has no descendants. I/flutter ( 601): ══════════ I/flutter ( 601): Another exception was thrown: RenderBox was not laid out: MyRenderBox#ec2de relayoutBoundary=up3 NEEDS-PAINT
Rémi Rousselet
It did work. But then you need to implement something inside
MyRenderBox. That's out of the scope of this question thoughSerge Breusov
I tried SingleChildRenderObject and LeafRenderObject.