the moving of rows works but resets on move

This breaks fluid movements from QML with KirigamiDragHandles

We will need to adjust how this move works in QML or get the
begin_move_rows function to build. If it can build we can still use
the KirigamiDragHandles.

src/rust/service_item_model.rs

@@ -322,20 +322,63 @@ mod service_item_model {
             dest_index: i32,
             count: i32,
         ) -> bool {
-            todo!();
+            let model_index =
+                self.index(source_index, 0, &QModelIndex::default());
+            let parent = model_index.parent();
+            let source_id = source_index as usize;
+            let dest_id = dest_index as usize;
+            let count = count as usize;
+            let end_service_item = source_id + count - 1;
+
+            println!("rust-end-service_item: {:?}", end_service_item);
+            println!("rust-dest-service_item: {:?}", dest_index);
+            unsafe {
+                // this function doesn't build
+                // self.as_mut().begin_move_rows(
+                //     &parent,
+                //     source_index,
+                //     source_index + count - 1,
+                //     &parent,
+                //     dest_index,
+                // );
+                self.as_mut().begin_reset_model();
+
+                if source_id < dest_id {
+                    let move_amount = dest_id - source_id - count + 1;
+                    self.as_mut().service_items_mut()
+                        [source_id..=dest_id]
+                        .rotate_right(move_amount);
+                    println!("rust-move_amount: {:?}", move_amount);
+                } else {
+                    let move_amount =
+                        end_service_item - dest_id - count + 1;
+                    println!("rust-move_amount: {:?}", move_amount);
+                    self.as_mut().service_items_mut()
+                        [dest_id..=end_service_item]
+                        .rotate_left(move_amount);
+                }
+
+                // this function works, begin does not
+                // self.as_mut().end_move_rows();
+                self.as_mut().end_reset_model();
+                let item = self.as_mut().get_item(dest_index);
+                self.as_mut().emit_item_moved(
+                    &source_index,
+                    &dest_index,
+                    &item,
+                );
+                true
+            }
         }
 
         #[qinvokable]
-        pub fn move_up(mut self: Pin<&mut Self>, index: i32) -> bool {
-            todo!();
+        pub fn move_up(self: Pin<&mut Self>, index: i32) -> bool {
+            self.move_rows(index, index - 1, 1)
         }
 
         #[qinvokable]
-        pub fn move_down(
-            mut self: Pin<&mut Self>,
-            index: i32,
-        ) -> bool {
-            todo!();
+        pub fn move_down(self: Pin<&mut Self>, index: i32) -> bool {
+            self.move_rows(index, index + 1, 1)
         }
 
         #[qinvokable]
@@ -904,6 +947,20 @@ mod service_item_model {
             self: Pin<&mut qobject::ServiceItemMod>,
         );
 
+        // cxx-qt can't build this function for some reason
+        // unsafe fn begin_move_rows(
+        //     self: Pin<&mut qobject::ServiceItemMod>,
+        //     source_parent: &QModelIndex,
+        //     source_first: i32,
+        //     source_last: i32,
+        //     destination_parent: &QModelIndex,
+        //     destination_child: i32,
+        // );
+
+        unsafe fn end_move_rows(
+            self: Pin<&mut qobject::ServiceItemMod>,
+        );
+
         unsafe fn begin_remove_rows(
             self: Pin<&mut qobject::ServiceItemMod>,
             parent: &QModelIndex,