Question 75132 in Flutter Question posted in
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How to get radius of the RenderObject in flutter?

I have screen where show showcase screen component. Now these components can be anything and I want to dynamically find radius of the widget. Which I will pass to a custom painter to draw that shape with radius.

I have tried using finding anything useful in RenderObject but haven’t found anything.

Is there any method which can provide me RRect object similar to below?

    final box = globalKey.currentContext!.findRenderObject() as RenderBox;
    final rect = size & box.localToGlobal(Offset.zero);
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2

Answers


  1. Chosen as BEST ANSWER
    0

    I resolved it by using context.widget like this,

    double getRadius() {
    BuildContext? context = key!.currentContext;
    var parent = context?.widget;
    if (parent is Parent) {
      var gestureDetector = (parent).child;
      if (gestureDetector is GestureDetector) {
        var clipRRect = gestureDetector.child;
        if (clipRRect is ClipRRect) {
          return (clipRRect.borderRadius as BorderRadius).topRight.x;
        }
      }
    }
 return 0;
}

  2. 0

    A RenderObject will not be disposed until you replace it by another RenderObject of a different type, or remove the associated widget from the widget tree.

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