da.h

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// -*- C++ -*-
//
// gvectors is a frontend to libgvectors using gtkmm.
// Copyright (C) 2007  Rafael Ostertag
//
// This program 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 2
// of the License, or (at your option) any later version.
//
// 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
// USA.
//
// $Id: da_8h-source.html,v 1.1 2007-09-10 23:31:14 rafi Exp $
//
// File:   da.h
// Author: Rafael Ostertag
//
// Created on July 17, 2007, 9:47 PM
//


#ifndef _DA_H
#define _DA_H

#include <gtkmm.h>
#include <gvectors.h>

#include "vectorlist.h"

// Forward declaration.
class NTab;

class DA : public Gtk::DrawingArea {
private:
    Glib::RefPtr<Gdk::Window> window; // Set by prepare_for_drawing()
    GVectors::Coordinates common_origin; // Set by
                                         // prepare_for_drawing()
    Gtk::Allocation allocation; // Set by prepare_for_drawing()
    double height; // Set by prepare_for_drawing()
    double width; // Set by prepare_for_drawing()
    double line_width;
    
    GVectors::VectorStore &vstore;
    double scale;
    GVectors::Rotation rotation;
    
    bool left_mouse_button_pressed;
    bool use_mouse_coords_1;
    GVectors::Coordinates mouse_coords_1;
    GVectors::Coordinates mouse_coords_2;
    
    NTab& nt;
    
protected:
    bool on_expose_event(GdkEventExpose* event);
    bool on_button_press_event(GdkEventButton *be);
    bool on_button_release_event(GdkEventButton *be);
    bool on_motion_notify_event(GdkEventMotion *em);
    void prepare_vectors();
    void prepare_for_drawing();
    
public:
    DA(NTab& nt, GVectors::VectorStore& vs);
    virtual ~DA();
    
    void set_line_width(double lw);
    double get_line_width() const;
    
    void set_scale(double s);
    void set_rotation(GVectors::Rotation& r);
    
    double get_scale() const;
    GVectors::Rotation get_rotation() const;
    
    void check_dimension();
};

#endif  /* _DA_H */

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