feature: MouseCursor for expanding row #687

frontend/app_flowy/lib/workspace/presentation/plugins/grid/src/widgets/header/field_cell.dart

@@ -115,12 +115,17 @@ class _DragToExpandLine extends StatelessWidget {
       child: GestureDetector(
         behavior: HitTestBehavior.opaque,
         onHorizontalDragUpdate: (value) {
-          context.read<FieldCellBloc>().add(FieldCellEvent.startUpdateWidth(value.delta.dx));
+          context
+              .read<FieldCellBloc>()
+              .add(FieldCellEvent.startUpdateWidth(value.delta.dx));
         },
         onHorizontalDragEnd: (end) {
-          context.read<FieldCellBloc>().add(const FieldCellEvent.endUpdateWidth());
+          context
+              .read<FieldCellBloc>()
+              .add(const FieldCellEvent.endUpdateWidth());
         },
         child: FlowyHover(
+          cursor: SystemMouseCursors.resizeLeftRight,
           style: HoverStyle(
             hoverColor: theme.main1,
             borderRadius: BorderRadius.zero,

frontend/app_flowy/packages/flowy_infra_ui/lib/style_widget/hover.dart

@@ -9,14 +9,16 @@ class FlowyHover extends StatefulWidget {
   final HoverBuilder? builder;
   final Widget? child;
   final bool Function()? setSelected;
+  final MouseCursor? cursor;
 
-  const FlowyHover({
-    Key? key,
-    this.builder,
-    this.child,
-    required this.style,
-    this.setSelected,
-  }) : super(key: key);
+  const FlowyHover(
+      {Key? key,
+      this.builder,
+      this.child,
+      required this.style,
+      this.setSelected,
+      this.cursor})
+      : super(key: key);
 
   @override
   State<FlowyHover> createState() => _FlowyHoverState();
@@ -28,7 +30,7 @@ class _FlowyHoverState extends State<FlowyHover> {
   @override
   Widget build(BuildContext context) {
     return MouseRegion(
-      cursor: SystemMouseCursors.click,
+      cursor: widget.cursor != null ? widget.cursor! : SystemMouseCursors.click,
       opaque: false,
       onEnter: (p) => setState(() => _onHover = true),
       onExit: (p) => setState(() => _onHover = false),