boardview.hpp

/*
    This file is part of Cute Chess.
    Copyright (C) 2008-2018 Cute Chess authors

    Cute Chess is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Cute Chess is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Cute Chess.  If not, see <http://www.gnu.org/licenses/>.
*/

/*
    This file was heavily modified from its original Cute Chess source by tsoj.
*/

#pragma once

#include <QGraphicsView>
#include <QPixmap>
class QTimer;

/*!
 * \brief A view widget for displaying a QGraphicsScene.
 *
 * BoardView is meant for visualizing the contents of a BoardScene.
 * Unlike a pure QGraphicsView, BoardView doesn't use scrollbars and
 * always keeps the view fitted to the entire scene.
 */
class BoardView : public QGraphicsView {
    Q_OBJECT

   public:
    /*! Creates a new BoardView object that displays \a scene. */
    explicit BoardView(QGraphicsScene* scene, QWidget* parent = nullptr);

    // Inherited from QGraphicsView
    virtual QSize sizeHint() const;
    virtual int heightForWidth(int width) const;

   protected:
    // Inherited from QGraphicsView
    virtual void resizeEvent(QResizeEvent* event);
    virtual void paintEvent(QPaintEvent* event);

   private slots:
    void fit_to_rect();
    void on_scene_rect_changed();

   private:
    bool m_initialized;
    QTimer* m_resize_timer;
    QPixmap m_resize_pixmap;
};