feat(engine): handle mouse scroll in dear imgui backend

1 files changed, 15 insertions, 13 deletions

diff --git a/engine/src/ui/imgui.rs b/engine/src/ui/imgui.rs
index 7dea7fb..75ce9c0 100644
--- a/engine/src/ui/imgui.rs
+++ b/engine/src/ui/imgui.rs
@@ -503,12 +503,11 @@ fn update_inputs(
     mouse_buttons: &MouseButtons,
 )
 {
+    let io = context.ctx.get_io_mut();
+
     for (key, key_state) in keyboard.new_key_states() {
         if let Some(key) = key_to_imgui_key(key) {
-            context
-                .ctx
-                .get_io_mut()
-                .add_key_event(key, key_state.is_pressed());
+            io.add_key_event(key, key_state.is_pressed());
         }
     }
 
@@ -517,22 +516,25 @@ fn update_inputs(
             continue;
         }
 
-        context.ctx.get_io_mut().add_input_character(character);
+        io.add_input_character(character);
     }
 
+    io.add_mouse_source_event(dear_imgui_rs::input::MouseSource::Mouse);
+
     let mouse_pos = mouse.position.to_logical::<f64>(window.scale_factor());
 
-    context
-        .ctx
-        .get_io_mut()
-        .add_mouse_pos_event([mouse_pos.x as f32, mouse_pos.y as f32]);
+    io.add_mouse_pos_event([mouse_pos.x as f32, mouse_pos.y as f32]);
+
+    if !mouse.curr_tick_scroll_delta.is_zero() {
+        io.add_mouse_wheel_event([
+            mouse.curr_tick_scroll_delta.hor_lines,
+            mouse.curr_tick_scroll_delta.vert_lines,
+        ]);
+    }
 
     for (mouse_button, mouse_button_state) in mouse_buttons.all_current() {
         if let Some(mouse_button) = mouse_button_to_imgui_mouse_button(mouse_button) {
-            context
-                .ctx
-                .get_io_mut()
-                .add_mouse_button_event(mouse_button, mouse_button_state.is_pressed());
+            io.add_mouse_button_event(mouse_button, mouse_button_state.is_pressed());
         }
     }
 }