From c32e64fe74b1e60df921340df3bf7c0c2880f650 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Elias=20M=C3=BCller?= <elias@elias-mueller.com>
Date: Thu, 7 May 2026 09:51:13 +0200
Subject: [PATCH] improved yOfDateTime precision and period-based calculation
 in workweek calendar

---
 .../widgets/custom_workweek_calendar.dart     | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/lib/view/pages/timetable/widgets/custom_workweek_calendar.dart b/lib/view/pages/timetable/widgets/custom_workweek_calendar.dart
index 9c776ef..8bfdbd5 100644
--- a/lib/view/pages/timetable/widgets/custom_workweek_calendar.dart
+++ b/lib/view/pages/timetable/widgets/custom_workweek_calendar.dart
@@ -1169,8 +1169,23 @@ class _PeriodLayout {
     return y;
   }
 
-  double yOfDateTime(DateTime t) =>
-      yOf(TimeOfDay(hour: t.hour, minute: t.minute));
+  double yOfDateTime(DateTime t) {
+    final tMin = t.hour * 60 + t.minute + t.second / 60.0;
+    var y = 0.0;
+    for (final p in periods) {
+      final pStart = p.start.hour * 60 + p.start.minute;
+      final pEnd = p.end.hour * 60 + p.end.minute;
+      final h = _h(p);
+      if (tMin < pStart) return y;
+      if (tMin <= pEnd) {
+        final span = pEnd - pStart;
+        final ratio = span > 0 ? (tMin - pStart) / span : 0.0;
+        return y + ratio * h;
+      }
+      y += h;
+    }
+    return y;
+  }
 
   /// Period at a given y-offset. If y falls into a break, returns the next
   /// non-break period. Returns null when y is past the last period.