Qt: Implement graphics window and controls

Source/Core/DolphinQt2/Config/Graphics/GraphicsWindow.h

@@ -0,0 +1,47 @@
+// Copyright 2017 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QDialog>
+#include <QHash>
+
+class GraphicsWidget;
+class MainWindow;
+class QLabel;
+class QTabWidget;
+class QDialogButtonBox;
+
+namespace X11Utils
+{
+class XRRConfiguration;
+}
+
+class GraphicsWindow final : public QDialog
+{
+  Q_OBJECT
+public:
+  explicit GraphicsWindow(X11Utils::XRRConfiguration* xrr_config, MainWindow* parent);
+
+  void RegisterWidget(GraphicsWidget* widget);
+  bool eventFilter(QObject* object, QEvent* event) override;
+signals:
+  void BackendChanged(const QString& backend);
+  void EmulationStarted();
+  void EmulationStopped();
+
+private:
+  void CreateMainLayout();
+  void ConnectWidgets();
+  void OnBackendChanged(const QString& backend);
+  void OnDescriptionAdded(QWidget* widget, const char* description);
+
+  QTabWidget* m_tab_widget;
+  QLabel* m_description;
+  QDialogButtonBox* m_button_box;
+
+  X11Utils::XRRConfiguration* m_xrr_config;
+
+  QHash<QObject*, const char*> m_widget_descriptions;
+};