boundingBox method
Implementation
@override
PdfRect boundingBox() {
var x = double.infinity, y = double.infinity, w = 0.0, h = 0.0;
for (final child in children) {
final b = child.boundingBox();
x = min(b.x, x);
y = min(b.y, y);
w = max(b.width, w);
h = max(b.height, w);
}
return PdfRect(x, y, w, h);
}