Space bar As Back button

Author: diegolix29

src/sdl_window.cpp

@@ -145,6 +145,7 @@ void WindowSDL::onKeyPress(const SDL_Event* event) {
     Input::Axis axis = Input::Axis::AxisMax;
     int axisvalue = 0;
     int ax = 0;
+    std::string backButtonBehavior = Config::getBackButtonBehavior();
     switch (event->key.key) {
     case SDLK_UP:
         button = OrbisPadButtonDataOffset::ORBIS_PAD_BUTTON_UP;
@@ -278,7 +279,15 @@ void WindowSDL::onKeyPress(const SDL_Event* event) {
         ax = Input::GetAxis(0, 0x80, axisvalue);
         break;
     case SDLK_SPACE:
-        button = OrbisPadButtonDataOffset::ORBIS_PAD_BUTTON_TOUCH_PAD;
+        if (backButtonBehavior != "none") {
+            float x = backButtonBehavior == "left" ? 0.25f
+                                                   : (backButtonBehavior == "right" ? 0.75f : 0.5f);
+            // trigger a touchpad event so that the touchpad emulation for back button works
+            controller->SetTouchpadState(0, true, x, 0.5f);
+            button = OrbisPadButtonDataOffset::ORBIS_PAD_BUTTON_TOUCH_PAD;
+        } else {
+            button = 0;
+        }
         break;
     case SDLK_F11:
         if (event->type == SDL_EVENT_KEY_DOWN) {