From 5c4acdb71641272a254ab734f5299d037f594535 Mon Sep 17 00:00:00 2001
From: Herwig Birke <Herwig.Birke@windesign.at>
Date: Sun, 16 Nov 2025 23:05:40 +0100
Subject: [PATCH] Chart im Export

---
 lib/features/igel/presentation/igel_detail_screen.dart | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/features/igel/presentation/igel_detail_screen.dart b/lib/features/igel/presentation/igel_detail_screen.dart
index 7cfa956..aa8be1e 100644
--- a/lib/features/igel/presentation/igel_detail_screen.dart
+++ b/lib/features/igel/presentation/igel_detail_screen.dart
@@ -716,6 +716,11 @@ class _IgelDetailState extends ConsumerState<IgelDetailScreen> {
       if (ctx == null) return null;
       final boundary = ctx.findRenderObject() as RenderRepaintBoundary?;
       if (boundary == null) return null;
+      // Ensure the chart has been painted before capturing, otherwise toImage can return empty.
+      if (boundary.debugNeedsPaint) {
+        await Future.delayed(Duration.zero);
+        await WidgetsBinding.instance.endOfFrame;
+      }
       final ui.Image img = await boundary.toImage(pixelRatio: 3);
       final byteData = await img.toByteData(format: ui.ImageByteFormat.png);
       return byteData?.buffer.asUint8List();