glchartpreviewrenderer.h

开源的电子海图程序

/* GHelm - Nautical Navigation Software
 * Copyright (C) 2004 Jon Michaelchuck
 *
 * This application 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 software 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 software; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA.
 */

#ifndef GLCHARTPREVIEWRENDERER_H_
#define GLCHARTPREVIEWRENDERER_H_

#include <sstream>
#include <iostream>
#include <vector>

#include <gtkglmm.h>
#include <gtkmm.h>
#include <GL/gl.h>
#include <GL/glu.h>

#include "chart.h"
#include "configuration.h"
#include "waypointlist.h"

/**
 * OpenGL Chart Preview Renderer
 */
class GLChartPreviewRenderer : public Gtk::GL::DrawingArea
{
    public:
        GLChartPreviewRenderer();
        ~GLChartPreviewRenderer();
        int Init(Configuration *conf,
                 Glib::RefPtr<Gdk::GL::Config> glconfig,
                 Glib::RefPtr<Gdk::GL::Context> share_list);
        void SetChart(Chart *ch);
        Chart *GetChart() { return chart; }
        void UnloadChart() { chart = NULL; }
        // custom signal handlers
        void on_switched(Chart *chart);
        void on_load_chart(Chart *chart);
        void on_unload_chart();
        void on_set_view_rect(double x, double y, double w, double h);
    private:
        // rendering
        void Render();
        void DrawViewRect();
        void SetView();
        // zooming and panning
        void Scroll(gdouble x, gdouble y);
        void MoveViewRect(double x, double y);
        // rendering callbacks
        void on_realize();
        bool on_configure_event(GdkEventConfigure *event);
        bool on_expose_event(GdkEventExpose *event);
        // event callbacks
        bool on_button_press_event(GdkEventButton *event);
        bool on_button_release_event(GdkEventButton *event);
        bool on_motion_notify_event(GdkEventMotion *event);
        bool on_scroll_event(GdkEventScroll *event);

        int glerror;

        // input
        bool left_mouse_button;
        gdouble last_x, last_y;

        // window, zoom/pan
        int xsize, ysize;
        double zoom;
        double left_edge;
        double bottom_edge;
        float slat, wlon, nlat, elon; 

        double view_rect[4][2];

        Chart *chart;
        Configuration *configuration;
        bool inited;
        bool moving;
};

#endif