windows: Ignore key/mouse input while menu focused.

This prevents arrow and shortcut keys from being considered inputs to the
game or UI.

Windows/RawInput.cpp

@@ -21,6 +21,7 @@
 #include "input/input_state.h"
 #include "Windows/RawInput.h"
 #include "Windows/KeyboardDevice.h"
+#include "Windows/WndMainWindow.h"
 #include "Windows/WindowsHost.h"
 #include "Common/CommonFuncs.h"
 #include "Core/Config.h"
@@ -54,6 +55,7 @@ namespace WindowsRawInput {
 	static std::set<int> keyboardKeysDown;
 	static void *rawInputBuffer;
 	static size_t rawInputBufferSize;
+	static bool menuActive;
 
 	void Init() {
 		RAWINPUTDEVICE dev[3];
@@ -76,6 +78,16 @@ namespace WindowsRawInput {
 		}
 	}
 
+	bool UpdateMenuActive() {
+		MENUBARINFO info;
+		memset(&info, 0, sizeof(info));
+		info.cbSize = sizeof(info);
+		if (GetMenuBarInfo(MainWindow::GetHWND(), OBJID_MENU, 0, &info) != 0) {
+			menuActive = info.fBarFocused != FALSE;
+		}
+		return menuActive;
+	}
+
 	static int GetTrueVKey(const RAWKEYBOARD &kb) {
 		switch (kb.VKey) {
 		case VK_SHIFT:
@@ -99,6 +111,11 @@ namespace WindowsRawInput {
 	}
 
 	void ProcessKeyboard(RAWINPUT *raw, bool foreground) {
+		if (menuActive && UpdateMenuActive()) {
+			// Ignore keyboard input while a menu is active, it's probably interacting with the menu.
+			return;
+		}
+
 		KeyInput key;
 		key.deviceId = DEVICE_ID_KEYBOARD;
 
@@ -125,6 +142,11 @@ namespace WindowsRawInput {
 	}
 
 	void ProcessMouse(RAWINPUT *raw, bool foreground) {
+		if (menuActive && UpdateMenuActive()) {
+			// Ignore mouse input while a menu is active, it's probably interacting with the menu.
+			return;
+		}
+
 		KeyInput key;
 		key.deviceId = DEVICE_ID_MOUSE;
 
@@ -192,6 +214,10 @@ namespace WindowsRawInput {
 		}
 	}
 
+	void NotifyMenu() {
+		UpdateMenuActive();
+	}
+
 	void Shutdown() {
 		if (rawInputBuffer) {
 			free(rawInputBuffer);

Windows/RawInput.h

@@ -21,5 +21,6 @@ namespace WindowsRawInput {
 	void Init();
 	LRESULT Process(HWND hWnd, WPARAM wParam, LPARAM lParam);
 	void LoseFocus();
+	void NotifyMenu();
 	void Shutdown();
 };

Windows/WndMainWindow.cpp

@@ -1584,6 +1584,7 @@ namespace MainWindow
 			// Unfortunately, accelerate keys (hotkeys) shares the same enabled/disabled states
 			// with corresponding menu items.
 			UpdateMenus();
+			WindowsRawInput::NotifyMenu();
 			break;
 
 		// Turn off the screensaver.