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[LinearPercentIndicator] Cannot get size from a render object that has not been through layout #210

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[LinearPercentIndicator] Cannot get size from a render object that has not been through layout #210

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a8077c0
check hasSize before reading size
garbidge May 23, 2024
1836868
add extension for getting RenderBox size from GlobalKey
garbidge May 24, 2024
fa667b6
rename
garbidge May 24, 2024
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21 changes: 16 additions & 5 deletions lib/linear_percent_indicator.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,16 @@ extension ExtDouble on double {
bool get isZero => this.toString() == '0.0';
}

extension ExtGlobalKey on GlobalKey {
Size getSize() {
final RenderObject? renderObject = currentContext?.findRenderObject();
if (renderObject is RenderBox && renderObject.hasSize) {
return renderObject.size;
}
return Size.zero;
}
}

// ignore: must_be_immutable
class LinearPercentIndicator extends StatefulWidget {
///Percent value between 0.0 and 1.0
Expand Down Expand Up @@ -177,13 +187,14 @@ class _LinearPercentIndicatorState extends State<LinearPercentIndicator>
void initState() {
WidgetsBinding.instance.addPostFrameCallback((_) {
if (mounted) {
final Size containerSize = _containerKey.getSize();
final Size indicatorSize = _keyIndicator.getSize();
setState(() {
_containerWidth = _containerKey.currentContext?.size?.width ?? 0.0;
_containerHeight = _containerKey.currentContext?.size?.height ?? 0.0;
_containerWidth = containerSize.width;
_containerHeight = containerSize.height;
if (_keyIndicator.currentContext != null) {
_indicatorWidth = _keyIndicator.currentContext?.size?.width ?? 0.0;
_indicatorHeight =
_keyIndicator.currentContext?.size?.height ?? 0.0;
_indicatorWidth = indicatorSize.width;
_indicatorHeight = indicatorSize.height;
}
});
}
Expand Down