citra-qt: release all buttons when render window focus is lost

src/citra_qt/bootmanager.cpp

@@ -230,6 +230,10 @@ void GRenderWindow::mouseReleaseEvent(QMouseEvent* event) {
         motion_emu->EndTilt();
 }
 
+void GRenderWindow::focusOutEvent(QFocusEvent* event) {
+    KeyMap::ReleaseAllKeys(*this);
+}
+
 void GRenderWindow::ReloadSetKeymaps() {
     KeyMap::ClearKeyMapping(keyboard_id);
     for (int i = 0; i < Settings::NativeInput::NUM_INPUTS; ++i) {

src/citra_qt/bootmanager.h

@@ -127,6 +127,8 @@ public:
     void mouseMoveEvent(QMouseEvent* event) override;
     void mouseReleaseEvent(QMouseEvent* event) override;
 
+    void focusOutEvent(QFocusEvent* event) override;
+
     void ReloadSetKeymaps() override;
 
     void OnClientAreaResized(unsigned width, unsigned height);

src/core/frontend/key_map.cpp

@@ -149,4 +149,16 @@ void ReleaseKey(EmuWindow& emu_window, HostDeviceKey key) {
         }
     }
 }
+
+void ReleaseAllKeys(EmuWindow& emu_window) {
+    // Release "all" of the buttons.
+    emu_window.ButtonReleased({0xFFFFFFFF});
+
+    circle_pad_up = false;
+    circle_pad_right = false;
+    circle_pad_left = false;
+    circle_pad_right = false;
+    circle_pad_modifier = false;
+    UpdateCirclePad(emu_window);
+}
 }

src/core/frontend/key_map.h

@@ -90,4 +90,9 @@ void PressKey(EmuWindow& emu_window, HostDeviceKey key);
  * Maps a key release action and call the corresponding function in EmuWindow
  */
 void ReleaseKey(EmuWindow& emu_window, HostDeviceKey key);
+
+/**
+* Releases all pressed keys and resets the circle pad state to the center.
+*/
+void ReleaseAllKeys(EmuWindow& emu_window);
 }