ANDROID: Add swap menu and back buttons option

3 files changed, 42 insertions, 12 deletions

diff --git a/backends/platform/android/android.cpp b/backends/platform/android/android.cpp
index 7d5bce9c85..c1f8a6c493 100644
--- a/backends/platform/android/android.cpp
+++ b/backends/platform/android/android.cpp
@@ -102,7 +102,8 @@ OSystem_Android::OSystem_Android(int audio_sample_rate, int audio_buffer_size) :
 	_dpad_scale(4),
 	_fingersDown(0),
 	_trackball_scale(2),
-	_joystick_scale(10) {
+	_joystick_scale(10),
+	_swap_menu_and_back(false) {
 
 	_fsFactory = new POSIXFilesystemFactory();
 
@@ -307,6 +308,7 @@ void OSystem_Android::initBackend() {
 	ConfMan.registerDefault("aspect_ratio", true);
 	ConfMan.registerDefault("touchpad_mouse_mode", true);
 	ConfMan.registerDefault("onscreen_control", true);
+	ConfMan.registerDefault("swap_menu_and_back", false);
 
 	ConfMan.setInt("autosave_period", 0);
 	ConfMan.setBool("FM_high_quality", false);
@@ -325,6 +327,11 @@ void OSystem_Android::initBackend() {
 	else
 		ConfMan.setBool("onscreen_control", true);
 
+	if (ConfMan.hasKey("swap_menu_and_back_buttons"))
+		_swap_menu_and_back = ConfMan.getBool("swap_menu_and_back_buttons");
+	else
+		ConfMan.setBool("swap_menu_and_back_buttons", false);
+
 	// must happen before creating TimerManager to avoid race in
 	// creating EventManager
 	setupKeymapper();
@@ -365,6 +372,7 @@ bool OSystem_Android::hasFeature(Feature f) {
 			f == kFeatureOpenUrl ||
 			f == kFeatureTouchpadMode ||
 			f == kFeatureOnScreenControl ||
+			f == kFeatureSwapMenuAndBackButtons ||
 			f == kFeatureClipboardSupport) {
 		return true;
 	}
@@ -387,6 +395,10 @@ void OSystem_Android::setFeatureState(Feature f, bool enable) {
 		ConfMan.setBool("onscreen_control", enable);
 		JNI::showKeyboardControl(enable);
 		break;
+	case kFeatureSwapMenuAndBackButtons:
+		ConfMan.setBool("swap_menu_and_back_buttons", enable);
+		_swap_menu_and_back = enable;
+		break;
 	default:
 		ModularBackend::setFeatureState(f, enable);
 		break;
@@ -401,6 +413,8 @@ bool OSystem_Android::getFeatureState(Feature f) {
 		return ConfMan.getBool("touchpad_mouse_mode");
 	case kFeatureOnScreenControl:
 		return ConfMan.getBool("onscreen_control");
+	case kFeatureSwapMenuAndBackButtons:
+		return ConfMan.getBool("swap_menu_and_back_buttons");
 	default:
 		return ModularBackend::getFeatureState(f);
 	}
diff --git a/backends/platform/android/android.h b/backends/platform/android/android.h
index 96219c28de..b13b42e5bf 100644
--- a/backends/platform/android/android.h
+++ b/backends/platform/android/android.h
@@ -112,6 +112,7 @@ private:
 	int _dpad_scale;
 	int _joystick_scale;
 	int _fingersDown;
+	bool _swap_menu_and_back;
 
 	void clipMouse(Common::Point &p);
 	void scaleMouse(Common::Point &p, int x, int y, bool deductDrawRect = true, bool touchpadMode = false);
diff --git a/backends/platform/android/events.cpp b/backends/platform/android/events.cpp
index 465c6a1531..84a95ffa3c 100644
--- a/backends/platform/android/events.cpp
+++ b/backends/platform/android/events.cpp
@@ -99,23 +99,38 @@ void OSystem_Android::pushEvent(int type, int arg1, int arg2, int arg3,
 
 		// special case. we'll only get it's up event
 		case JKEYCODE_BACK:
-			e.kbd.keycode = Common::KEYCODE_ESCAPE;
-			e.kbd.ascii = Common::ASCII_ESCAPE;
-
-			lockMutex(_event_queue_lock);
-			e.type = Common::EVENT_KEYDOWN;
-			_event_queue.push(e);
-			e.type = Common::EVENT_KEYUP;
-			_event_queue.push(e);
-			unlockMutex(_event_queue_lock);
+			if (_swap_menu_and_back) {
+				e.type = Common::EVENT_MAINMENU;
+				pushEvent(e);
+			} else {
+				e.kbd.keycode = Common::KEYCODE_ESCAPE;
+				e.kbd.ascii = Common::ASCII_ESCAPE;
 
+				lockMutex(_event_queue_lock);
+				e.type = Common::EVENT_KEYDOWN;
+				_event_queue.push(e);
+				e.type = Common::EVENT_KEYUP;
+				_event_queue.push(e);
+				unlockMutex(_event_queue_lock);
+			}
 			return;
 
 		// special case. we'll only get it's up event
 		case JKEYCODE_MENU:
-			e.type = Common::EVENT_MAINMENU;
+			if (_swap_menu_and_back) {
+				e.kbd.keycode = Common::KEYCODE_ESCAPE;
+				e.kbd.ascii = Common::ASCII_ESCAPE;
 
-			pushEvent(e);
+				lockMutex(_event_queue_lock);
+				e.type = Common::EVENT_KEYDOWN;
+				_event_queue.push(e);
+				e.type = Common::EVENT_KEYUP;
+				_event_queue.push(e);
+				unlockMutex(_event_queue_lock);
+			} else {
+				e.type = Common::EVENT_MAINMENU;
+				pushEvent(e);
+			}
 
 			return;