View.h

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/* Copyright © 2009, 2010 James Legg.
    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 3 of the License, or
    (at your option) any later version.
*/
#ifndef VIEW_H_
#define VIEW_H_

#include <boost/shared_ptr.hpp>

#include <gtkmm/uimanager.h>
#include <gtkmm/menu.h>

#include <gtkglmm.h>

#include <libtrack/document/Document.h>
#include <libtrack/edit_base/Selectable.h>
#include <libtrack/edit_base/Dragable.h>

class View : public Gtk::GL::DrawingArea
{
public:
    View();
    
    View(View & view);
    
    virtual ~View();
    
    enum ViewAngle {
        VIEW_TOP,
        
        VIEW_SIDE,
        
        VIEW_FRONT};
    
    void set_document(Document::Document & document);
    
    void set_angle(const ViewAngle angle);
    
    ViewAngle get_angle() const;
    
    void set_scale(const float scale);
    
    float get_scale() const;
    
    void set_centre(btVector3 centre);
    
    btVector3 get_centre() const;
    
    // Make realize public so that the View can have an OpenGL context created
    // for another View to share with.
    void realize()
    {
        Gtk::GL::DrawingArea::realize();
    }
    
    sigc::signal<void, boost::shared_ptr<Document::DocumentDelta> > signal_command();
    
    sigc::signal<void, boost::shared_ptr<Document::DocumentDelta> > signal_preview_command();
    
    sigc::signal<void> signal_preview_cancel();
protected:
    // signal handlers:
    virtual void on_realize();
    virtual bool on_configure_event(GdkEventConfigure* event);
    virtual bool on_expose_event(GdkEventExpose* event);
    virtual bool on_scroll_event(GdkEventScroll* event);
    // Handle other mouse events
    virtual bool on_button_press_event (GdkEventButton* event);
    virtual bool on_button_release_event (GdkEventButton* event);
    virtual bool on_motion_notify_event (GdkEventMotion* event);
    // actions
    void on_delete_vertex();
    void on_delete_edge();
    void on_delete_attachment();
    void on_flip_edge();
    void on_insert_vertex();
    void on_set_start_edge();
    void on_add_booster();
    
    void setup_ui();
    
    void recentre_view();
    
    void draw_path(const Track::Path & path);
    
    Document::Document * document;
    
    float scale;
    
    btScalar handle_length;
    
    btVector3 centre;
    
    ViewAngle view_angle;
    
    bool needs_recentre;
    
    const Track::EditAssist::Selectable * get_selectable_under_mouse();
    
    btVector3 mouse_to_scene(btScalar x, btScalar y) const;
    
    btVector3 new_position;
    
    void set_relative_depth(btVector3 & position, btScalar depth);
    
    const Track::EditAssist::Dragable * drag_object;
    
    const Track::EditAssist::Selectable * popup_object;
    
    sigc::signal<void, boost::shared_ptr<Document::DocumentDelta> > m_signal_command;
    
    sigc::signal<void, boost::shared_ptr<Document::DocumentDelta> > m_signal_preview_command;
    
    sigc::signal<void> m_signal_preview_cancel;
    
    Glib::RefPtr<Gtk::ActionGroup> m_action_group; 
    Glib::RefPtr<Gtk::UIManager> m_ui_manager;
    Gtk::UIManager::ui_merge_id m_menu_id;
    Gtk::Menu * m_popup_menu;
    Gtk::Menu * m_empty_menu;
    Gtk::Menu * m_attachment_menu;
    
    void pick_segment(std::size_t index);
};

#endif /*VIEW_H_*/

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