Move the cursor's origin back to the bottom-left (bevyengine#6533)

This reverts commit 8429b6d as discussed in bevyengine#6522.

I tested that the game_menu example works as it should.

Co-authored-by: devil-ira <justthecooldude@gmail.com>

crates/bevy_ui/src/focus.rs

@@ -127,6 +127,8 @@ pub fn ui_focus_system(
         .find_map(|window| window.cursor_position())
         .or_else(|| touches_input.first_pressed_position());
 
+    let window_height = windows.primary().height();
+
     // prepare an iterator that contains all the nodes that have the cursor in their rect,
     // from the top node to the bottom one. this will also reset the interaction to `None`
     // for all nodes encountered that are no longer hovered.
@@ -165,7 +167,7 @@ pub fn ui_focus_system(
                 // clicking
                 let contains_cursor = if let Some(cursor_position) = cursor_position {
                     (min.x..max.x).contains(&cursor_position.x)
-                        && (min.y..max.y).contains(&cursor_position.y)
+                        && (min.y..max.y).contains(&(window_height - cursor_position.y))
                 } else {
                     false
                 };

crates/bevy_winit/src/lib.rs

@@ -146,9 +146,12 @@ fn change_window(
                 }
                 bevy_window::WindowCommand::SetCursorPosition { position } => {
                     let window = winit_windows.get_window(id).unwrap();
-
+                    let inner_size = window.inner_size().to_logical::<f32>(window.scale_factor());
                     window
-                        .set_cursor_position(LogicalPosition::new(position.x, position.y))
+                        .set_cursor_position(LogicalPosition::new(
+                            position.x,
+                            inner_size.height - position.y,
+                        ))
                         .unwrap_or_else(|e| error!("Unable to set cursor position: {}", e));
                 }
                 bevy_window::WindowCommand::SetMaximized { maximized } => {
@@ -417,7 +420,13 @@ pub fn winit_runner_with(mut app: App) {
                         world.send_event(converters::convert_keyboard_input(input));
                     }
                     WindowEvent::CursorMoved { position, .. } => {
-                        let physical_position = DVec2::new(position.x, position.y);
+                        let winit_window = winit_windows.get_window(window_id).unwrap();
+                        let inner_size = winit_window.inner_size();
+
+                        // move origin to bottom left
+                        let y_position = inner_size.height as f64 - position.y;
+
+                        let physical_position = DVec2::new(position.x, y_position);
                         window
                             .update_cursor_physical_position_from_backend(Some(physical_position));