DolphinQt: adapt so that it can boot games.

Source/Core/DolphinQt/VideoInterface/RenderWidget.h

@@ -0,0 +1,28 @@
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QWidget>
+
+class DRenderWidget : public QWidget
+{
+	Q_OBJECT
+
+public:
+	DRenderWidget(QWidget* parent_widget = nullptr);
+
+protected:
+	// Some window managers start window dragging if an "empty" window area was clicked.
+	// Prevent this by intercepting the mouse press event.
+	void mousePressEvent(QMouseEvent*) override {}
+	void paintEvent(QPaintEvent*) override {}
+
+private slots:
+	void closeEvent(QCloseEvent* e) override;
+
+signals:
+	void Closed();
+};
+