scroll view patch

Signed-off-by: dom <githubaccount56556@proton.me>
2026-04-26 13:25:49 +08:00 · 2026-04-20 11:59:31 +08:00
parent 44b7cced09
commit bffdfae1f6
2 changed files with 81 additions and 1 deletions
--- a/lib/scripts/scroll_view.patch
+++ b/lib/scripts/scroll_view.patch
@@ -0,0 +1,73 @@
+diff --git a/packages/flutter/lib/src/widgets/scrollable.dart b/packages/flutter/lib/src/widgets/scrollable.dart
+index ac854f7de8f..fdeba1a88f5 100644
+--- a/packages/flutter/lib/src/widgets/scrollable.dart
+++ b/packages/flutter/lib/src/widgets/scrollable.dart
+@@ -786,11 +786,13 @@ class ScrollableState extends State<Scrollable>
+       switch (widget.axis) {
+         case Axis.vertical:
+           _gestureRecognizers = <Type, GestureRecognizerFactory>{
+-            VerticalDragGestureRecognizer:
+-                GestureRecognizerFactoryWithHandlers<VerticalDragGestureRecognizer>(
+-                  () => VerticalDragGestureRecognizer(supportedDevices: _configuration.dragDevices),
+-                  (VerticalDragGestureRecognizer instance) {
+            _VerticalDragGestureRecognizer:
+                GestureRecognizerFactoryWithHandlers<_VerticalDragGestureRecognizer>(
+                  () =>
+                      _VerticalDragGestureRecognizer(supportedDevices: _configuration.dragDevices),
+                  (_VerticalDragGestureRecognizer instance) {
+                     instance
+                      ..isDyAllowed = _isDyAllowed
+                       ..onDown = _handleDragDown
+                       ..onStart = _handleDragStart
+                       ..onUpdate = _handleDragUpdate
+@@ -859,6 +861,10 @@ class ScrollableState extends State<Scrollable>
+   Drag? _drag;
+   ScrollHoldController? _hold;
+ 
+  bool _isDyAllowed(double dy) {
+    return position.viewportDimension - dy > 30;
+  }
+
+   void _handleDragDown(DragDownDetails details) {
+     assert(_drag == null);
+     assert(_hold == null);
+@@ -2553,3 +2559,39 @@ class _HorizontalInnerDimensionState extends ScrollableState {
+     return _configuration.buildOverscrollIndicator(context, child, details);
+   }
+ }
+
+typedef IsDyAllowed = bool Function(double dy);
+
+class _VerticalDragGestureRecognizer extends VerticalDragGestureRecognizer {
+  _VerticalDragGestureRecognizer({
+    super.debugOwner,
+    super.supportedDevices,
+    super.allowedButtonsFilter,
+  });
+
+  IsDyAllowed? isDyAllowed;
+
+  bool _isDyAllowed = true;
+
+  @override
+  bool isPointerAllowed(PointerEvent event) {
+    _isDyAllowed = isDyAllowed?.call(event.localPosition.dy) ?? true;
+    return super.isPointerAllowed(event);
+  }
+
+  @override
+  T? invokeCallback<T>(
+    String name,
+    RecognizerCallback<T> callback, {
+    String Function()? debugReport,
+  }) {
+    if (!_isDyAllowed) return null;
+    return super.invokeCallback(name, callback, debugReport: debugReport);
+  }
+
+  @override
+  void dispose() {
+    isDyAllowed = null;
+    super.dispose();
+  }
+}