opt ui

Signed-off-by: dom <githubaccount56556@proton.me>

lib/common/widgets/scaffold/bottom_sheet.dart

@@ -0,0 +1,80 @@
+import 'package:flutter/gestures.dart' show VerticalDragGestureRecognizer;
+import 'package:flutter/material.dart';
+
+// ignore: camel_case_types
+class BottomSheet_ extends BottomSheet {
+  const BottomSheet_({
+    super.key,
+    super.animationController,
+    super.enableDrag = true,
+    super.onDragStart,
+    super.onDragEnd,
+    super.constraints,
+    required super.onClosing,
+    required super.builder,
+  });
+
+  @override
+  BottomSheetState createState() => _MiniBottomSheetState();
+}
+
+class _MiniBottomSheetState extends BottomSheetState {
+  VerticalDragGestureRecognizer? _verticalDragGestureRecognizer;
+
+  VerticalDragGestureRecognizer get verticalDragGestureRecognizer =>
+      _verticalDragGestureRecognizer ??=
+          VerticalDragGestureRecognizer(debugOwner: this)
+            ..onStart = handleDragStart
+            ..onUpdate = handleDragUpdate
+            ..onEnd = handleDragEnd
+            ..gestureSettings = MediaQuery.maybeGestureSettingsOf(context)
+            ..onlyAcceptDragOnThreshold = true;
+
+  @override
+  void dispose() {
+    super.dispose();
+    if (widget.enableDrag) {
+      _verticalDragGestureRecognizer?.dispose();
+      _verticalDragGestureRecognizer = null;
+    }
+  }
+
+  void _onPointerDown(PointerDownEvent event) {
+    verticalDragGestureRecognizer.addPointer(event);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final bool useMaterial3 = Theme.of(context).useMaterial3;
+    late final defaults = useMaterial3
+        ? BottomSheetDefaultsM3(context)
+        : const BottomSheetThemeData();
+    late final bottomSheetTheme = Theme.of(context).bottomSheetTheme;
+    final BoxConstraints? constraints =
+        widget.constraints ??
+        bottomSheetTheme.constraints ??
+        defaults.constraints;
+
+    Widget bottomSheet = KeyedSubtree(
+      key: childKey,
+      child: widget.builder(context),
+    );
+
+    if (constraints != null && constraints != const BoxConstraints()) {
+      bottomSheet = Align(
+        alignment: Alignment.bottomCenter,
+        heightFactor: 1.0,
+        child: ConstrainedBox(constraints: constraints, child: bottomSheet),
+      );
+    }
+
+    if (widget.enableDrag) {
+      return Listener(
+        onPointerDown: _onPointerDown,
+        child: bottomSheet,
+      );
+    }
+
+    return bottomSheet;
+  }
+}