[nostalgia/core/glfw] Fix keyboard support for ImGui

src/nostalgia/core/glfw/gfx.cpp

@@ -15,7 +15,7 @@ namespace nostalgia::core {
 
 constexpr auto Scale = 5;
 
-static void handleGlfwError(int err, const char *desc) {
+static void handleGlfwError(int err, const char *desc) noexcept {
     oxErrf("GLFW error ({}): {}\n", err, desc);
 }
 
@@ -23,6 +23,24 @@ void ImGui_Impl_NewFrame() noexcept {
 	ImGui_ImplGlfw_NewFrame();
 }
 
+static void handleKeyPress(Context *ctx, int key) noexcept {
+	switch (key) {
+		case GLFW_KEY_ESCAPE:
+		case GLFW_KEY_Q:
+			shutdown(ctx);
+			break;
+		default:
+			break;
+	}
+}
+
+static void handleGlfwKeyEvent(GLFWwindow *window, int key, int, int action, int) noexcept {
+	const auto ctx = static_cast<Context *>(glfwGetWindowUserPointer(window));
+	if (action == GLFW_PRESS) {
+		handleKeyPress(ctx, key);
+	}
+}
+
 ox::Error initGfx(Context *ctx) noexcept {
 	auto id = ctx->windowerData<GlfwImplData>();
 	glfwSetErrorCallback(handleGlfwError);
@@ -37,6 +55,7 @@ ox::Error initGfx(Context *ctx) noexcept {
 	if (id->window == nullptr) {
 		return OxError(1, "Could not open GLFW window");
 	}
+	glfwSetKeyCallback(id->window, handleGlfwKeyEvent);
 	glfwSetWindowUserPointer(id->window, ctx);
 	glfwMakeContextCurrent(id->window);
 	if constexpr(config::ImGuiEnabled) {