Debug toggling (#9)

#8 introduced some additional debug information to the view, which was already
rendering some information and visualizations which were not necessary relevant
to the end-user experience. This PR adds an input action (bound to Ctrl + `) to
toggle the display of those visualizations, and disables them by default.

studio/src/input.rs

@@ -15,6 +15,7 @@ impl Plugin for StudioInputPlugin {
             PreUpdate,
             (
                 translate_selection_events,
+                translate_debug_toggle,
                 translate_dcc_camera_events,
                 translate_fps_camera_events,
             )
@@ -38,6 +39,7 @@ pub enum Lifecycle {
 pub enum Action {
     Camera(CameraMotion),
     Selection(Selection),
+    ToggleDebug,
 }
 
 #[derive(Clone, Copy)]
@@ -83,6 +85,16 @@ fn translate_selection_events(keyboard: Res<Input<KeyCode>>, mut input: EventWri
     }
 }
 
+fn translate_debug_toggle(keyboard: Res<Input<KeyCode>>, mut input: EventWriter<InputAction>) {
+    if keyboard.pressed(KeyCode::ControlLeft) || keyboard.pressed(KeyCode::ControlRight) {
+        if keyboard.just_pressed(KeyCode::Grave) {
+            input.send(InputAction(Lifecycle::Start, Action::ToggleDebug));
+        } else if keyboard.just_released(KeyCode::Grave) {
+            input.send(InputAction(Lifecycle::Stop, Action::ToggleDebug));
+        }
+    }
+}
+
 fn translate_dcc_camera_events(
     mouse_motion: EventReader<MouseMotion>,
     mouse_buttons: Res<Input<MouseButton>>,