Support key modifiers on emscripten.

Author: wolfpld

profiler/src/BackendEmscripten.cpp

@@ -162,6 +162,15 @@ static ImGuiKey TranslateKeyCode( const char* code )
     return ImGuiKey_None;
 }
 
+static void UpdateKeyModifiers( const EmscriptenKeyboardEvent* e )
+{
+    ImGuiIO& io = ImGui::GetIO();
+    io.AddKeyEvent( ImGuiMod_Ctrl, e->ctrlKey );
+    io.AddKeyEvent( ImGuiMod_Shift, e->shiftKey );
+    io.AddKeyEvent( ImGuiMod_Alt, e->altKey );
+    io.AddKeyEvent( ImGuiMod_Super, e->metaKey );
+}
+
 Backend::Backend( const char* title, const std::function<void()>& redraw, const std::function<void(float)>& scaleChanged, const std::function<int(void)>& isBusy, RunQueue* mainThreadTasks )
 {
     constexpr EGLint eglConfigAttrib[] = {
@@ -243,13 +252,15 @@ Backend::Backend( const char* title, const std::function<void()>& redraw, const
         return EM_TRUE;
     } );
     emscripten_set_keydown_callback( EMSCRIPTEN_EVENT_TARGET_WINDOW, nullptr, EM_TRUE, [] ( int, const EmscriptenKeyboardEvent* e, void* ) -> EM_BOOL {
+        UpdateKeyModifiers( e );
         const auto code = TranslateKeyCode( e->code );
         if( code == ImGuiKey_None ) return EM_FALSE;
         ImGui::GetIO().AddKeyEvent( code, true );
         if( e->key[0] && !e->key[1] && !e->ctrlKey && !e->metaKey ) ImGui::GetIO().AddInputCharacter( *e->key );
         return EM_TRUE;
     } );
     emscripten_set_keyup_callback( EMSCRIPTEN_EVENT_TARGET_WINDOW, nullptr, EM_TRUE, [] ( int, const EmscriptenKeyboardEvent* e, void* ) -> EM_BOOL {
+        UpdateKeyModifiers( e );
         const auto code = TranslateKeyCode( e->code );
         if( code == ImGuiKey_None ) return EM_FALSE;
         ImGui::GetIO().AddKeyEvent( code, false );