[Game] Move graphics files into game_graphics

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cockatrice/src/game_graphics/game_view.h

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+/**
+ * @file game_view.h
+ * @ingroup GameGraphics
+ */
+//! \todo Document this file.
+
+#ifndef GAMEVIEW_H
+#define GAMEVIEW_H
+
+#include <QGraphicsView>
+
+class GameScene;
+class QLabel;
+class QRubberBand;
+
+class GameView : public QGraphicsView
+{
+    Q_OBJECT
+private:
+    QAction *aCloseMostRecentZoneView;
+    QRubberBand *rubberBand;
+    QLabel *dragCountLabel;
+    QLabel *totalCountLabel;
+    QPointF selectionOrigin;
+
+protected:
+    void resizeEvent(QResizeEvent *event) override;
+private slots:
+    void startRubberBand(const QPointF &selectionOrigin);
+    void resizeRubberBand(const QPointF &cursorPoint, int selectedCount);
+    void stopRubberBand();
+    void refreshShortcuts();
+    void updateTotalSelectionCount(const QSize &viewSize = QSize());
+public slots:
+    void updateSceneRect(const QRectF &rect);
+
+public:
+    explicit GameView(GameScene *scene, QWidget *parent = nullptr);
+};
+
+#endif