support imgui modifiers

Author: sanbox-irl

src/lib.rs

@@ -350,14 +350,23 @@ fn handle_key(io: &mut Io, key: &Scancode, pressed: bool) {
 
 /// Handle changes in the key modifier states.
 fn handle_key_modifier(io: &mut Io, keymod: &Mod) {
-    io.add_key_event(imgui::Key::LeftShift, keymod.intersects(Mod::LSHIFTMOD));
-    io.add_key_event(imgui::Key::RightShift, keymod.intersects(Mod::RSHIFTMOD));
-    io.add_key_event(imgui::Key::LeftCtrl, keymod.intersects(Mod::LCTRLMOD));
-    io.add_key_event(imgui::Key::RightCtrl, keymod.intersects(Mod::RCTRLMOD));
-    io.add_key_event(imgui::Key::LeftAlt, keymod.intersects(Mod::LALTMOD));
-    io.add_key_event(imgui::Key::RightAlt, keymod.intersects(Mod::RALTMOD));
-    io.add_key_event(imgui::Key::LeftSuper, keymod.intersects(Mod::LGUIMOD));
-    io.add_key_event(imgui::Key::RightSuper, keymod.intersects(Mod::RGUIMOD));
+    // handle the actual modifiers:
+    io.add_key_event(
+        imgui::Key::ModShift,
+        keymod.intersects(Mod::LSHIFTMOD | Mod::RSHIFTMOD),
+    );
+    io.add_key_event(
+        imgui::Key::ModCtrl,
+        keymod.intersects(Mod::LCTRLMOD | Mod::RCTRLMOD),
+    );
+    io.add_key_event(
+        imgui::Key::ModAlt,
+        keymod.intersects(Mod::LALTMOD | Mod::RALTMOD),
+    );
+    io.add_key_event(
+        imgui::Key::ModSuper,
+        keymod.intersects(Mod::LGUIMOD | Mod::RGUIMOD),
+    );
 }
 
 /// Map an imgui::MouseCursor to an equivalent sdl2::mouse::SystemCursor.