Remove screen change detection since it breaks make changing screen. (Still need to test windows)

src/citra_qt/bootmanager.cpp

@@ -144,8 +144,7 @@ QByteArray GRenderWindow::saveGeometry() {
 }
 
 qreal GRenderWindow::windowPixelRatio() const {
-    // QOpenGLWidget isn't backed by a native window, so we need to use the top level window instead
+    return devicePixelRatio();
-    return QApplication::activeWindow()->devicePixelRatio();
 }
 
 std::pair<u32, u32> GRenderWindow::ScaleTouch(const QPointF pos) const {
@@ -250,7 +249,6 @@ void GRenderWindow::focusOutEvent(QFocusEvent* event) {
 
 void GRenderWindow::resizeEvent(QResizeEvent* event) {
     QOpenGLWidget::resizeEvent(event);
-    NotifyClientAreaSizeChanged(std::make_pair(event->size().width(), event->size().height()));
     OnFramebufferSizeChanged();
 }
 
@@ -298,10 +296,6 @@ void GRenderWindow::paintGL() {
 
 void GRenderWindow::showEvent(QShowEvent* event) {
     QWidget::showEvent(event);
-
-    // windowHandle() is not initialized until the Window is shown, so we connect it here.
-    connect(windowHandle(), &QWindow::screenChanged, this, &GRenderWindow::OnFramebufferSizeChanged,
-            Qt::UniqueConnection);
 }
 
 std::unique_ptr<Frontend::GraphicsContext> GRenderWindow::CreateSharedContext() const {

src/core/frontend/emu_window.h

@@ -185,15 +185,6 @@ protected:
         framebuffer_layout = layout;
     }
 
-    /**
-     * Update internal client area size with the given parameter.
-     * @note EmuWindow implementations will usually use this in window resize event handlers.
-     */
-    void NotifyClientAreaSizeChanged(const std::pair<unsigned, unsigned>& size) {
-        client_area_width = size.first;
-        client_area_height = size.second;
-    }
-
 private:
     /**
      * Handler called when the minimal client area was requested to be changed via SetConfig.
@@ -206,9 +197,6 @@ private:
 
     Layout::FramebufferLayout framebuffer_layout; ///< Current framebuffer layout
 
-    unsigned client_area_width;  ///< Current client width, should be set by window impl.
-    unsigned client_area_height; ///< Current client height, should be set by window impl.
-
     WindowConfig config;        ///< Internal configuration (changes pending for being applied in
                                 /// ProcessConfigurationChanges)
     WindowConfig active_config; ///< Internal active configuration