qt: Capture fullscreen shortcuts on Windows raw input, fixes #3434

src/qt/qt_mainwindow.cpp

@@ -1249,11 +1249,7 @@ MainWindow::keyPressEvent(QKeyEvent *event)
 #endif
     }
 
-    if (!fs_off_signal && (video_fullscreen > 0) && keyboard_isfsexit())
+    checkFullscreenHotkey(true);
-        fs_off_signal = true;
-
-    if (!fs_on_signal && (video_fullscreen == 0) && keyboard_isfsenter())
-        fs_on_signal = true;
 
     if (keyboard_ismsexit())
         plat_mouse_capture(0);
@@ -1289,15 +1285,7 @@ MainWindow::keyReleaseEvent(QKeyEvent *event)
         }
     }
 
-    if (fs_off_signal && (video_fullscreen > 0) && keyboard_isfsexit()) {
+    checkFullscreenHotkey(false);
-        ui->actionFullscreen->trigger();
-        fs_off_signal = false;
-    }
-
-    if (fs_on_signal && (video_fullscreen == 0) && keyboard_isfsenter()) {
-        ui->actionFullscreen->trigger();
-        fs_on_signal = false;
-    }
 
     if (!send_keyboard_input || event->isAutoRepeat())
         return;
@@ -1309,6 +1297,28 @@ MainWindow::keyReleaseEvent(QKeyEvent *event)
 #endif
 }
 
+void
+MainWindow::checkFullscreenHotkey(bool down)
+{
+    if (down) {
+        if (!fs_off_signal && (video_fullscreen > 0) && keyboard_isfsexit())
+            fs_off_signal = true;
+
+        if (!fs_on_signal && (video_fullscreen == 0) && keyboard_isfsenter())
+            fs_on_signal = true;
+    } else {
+        if (fs_off_signal && (video_fullscreen > 0) && keyboard_isfsexit()) {
+            ui->actionFullscreen->trigger();
+            fs_off_signal = false;
+        }
+
+        if (fs_on_signal && (video_fullscreen == 0) && keyboard_isfsenter()) {
+            ui->actionFullscreen->trigger();
+            fs_on_signal = false;
+        }
+    }
+}
+
 QSize
 MainWindow::getRenderWidgetSize()
 {

src/qt/qt_mainwindow.hpp

@@ -32,6 +32,7 @@ public:
     void  blitToWidget(int x, int y, int w, int h, int monitor_index);
     QSize getRenderWidgetSize();
     void  setSendKeyboardInput(bool enabled);
+    void  checkFullscreenHotkey(bool down);
 
     std::array<std::unique_ptr<RendererStack>, 8> renderers;
 signals:

src/qt/qt_winrawinputfilter.cpp

@@ -237,6 +237,8 @@ WindowsRawInputFilter::keyboard_handle(PRAWINPUT raw)
                     break;
             }
 
+            window->checkFullscreenHotkey(!(rawKB.Flags & RI_KEY_BREAK));
+
             /* Translate right CTRL to left ALT if the user has so
            chosen. */
             if ((scancode == 0x11d) && rctrl_is_lalt)