/*
 * canvas.cpp
 *
 *  Created: 2009, 2010
 *   Author: fischer
 *           for use in Yale course CPSC 427a, Fall 2010
 *
 *  Derived from:
 *  http://git.gnome.org/browse/gtkmm-documentation/tree/examples/book/drawingarea/clock
 *  subject to the following license:
 *
 *  gtkmm example Copyright (C) 2002 gtkmm development team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2
 *  as published by the Free Software Foundation.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
 */

#pragma once

#include <gtkmm/drawingarea.h>

class Clock; // forward

// ------------------------------------------------------------------
class Canvas: public Gtk::DrawingArea {
private:
    enum ColorName {
        black, gray, white, red, orange, yellow, green, blue
    };

    Clock* m_clock;
    const double m_radius;
    const double m_line_width;
    static const double colorTable[8][4];

    void setColor(Cairo::RefPtr<Cairo::Context> cr, ColorName c) {
        const double* cp = colorTable[c];
        cr->set_source_rgba(cp[0], cp[1], cp[2], cp[3]);
    }

public:
    Canvas(Clock* c);
    bool drawClock(Cairo::RefPtr<Cairo::Context> cr, GdkEventExpose* event,
            double width, double height);

    //Override default signal handler:
    virtual bool on_expose_event(GdkEventExpose* event);
    void forceRedraw();

};