source: trunk/nv/gui/gui_element.hh @ 269

// Copyright (C) 2012-2013 ChaosForge / Kornel Kisielewicz
// http://chaosforge.org/
//
// This file is part of NV Libraries.
// For conditions of distribution and use, see copyright notice in nv.hh

/**
 * @file gui_element.hh
 * @author Kornel Kisielewicz
 * @brief GUI Element
 */

#ifndef NV_GUI_ELEMENT_HH
#define NV_GUI_ELEMENT_HH

#include <nv/common.hh>
#include <nv/position.hh>
#include <nv/io_event.hh>
#include <nv/gui/gui_common.hh>

namespace nv
{
        namespace gui
        {

                class handle
                {
                public:
                        handle() : m_index(0), m_counter(0) {}

                        inline bool operator==(const handle& rhs){return m_index == rhs.m_index && m_counter == rhs.m_counter; }
                        inline bool operator!=(const handle& rhs){return !(*this == rhs);}

                        bool is_nil() { return m_index == 0 && m_counter == 0; }
                        bool is_valid() { return !is_nil(); }
                private:
                        friend class environment;

                        explicit handle( uint16 a_index, uint16 a_counter ) : m_index( a_index ), m_counter(a_counter) {}

                        uint16 m_index;
                        uint16 m_counter;
                };


                class element
                {
                public:
                        /// List type
                        typedef std::list<handle> list;


                        element()
                                : m_id( "" )
                                , m_this()
                                , m_parent()
                                , m_children()
                                , m_child_count(0)
                                , m_class("")
                                , m_relative()
                                , m_absolute()
                                , m_enabled( true )
                                , m_visible( true )
                                , m_dirty( true )
                                , m_render_data( nullptr ) {}

                        friend class environment;
                        friend class renderer;
                        friend class style;

                        string    m_id;              ///< id type of the object
                        handle    m_this;            ///< pointer to parent
                        handle    m_parent;          ///< pointer to parent
                        list      m_children;        ///< children objects
                        size_t    m_child_count;     ///< number of children
                        string    m_class; ///< Class name.
                        string    m_text; ///< Displayed label or text.
                        rectangle m_relative; ///< Position relative to parent.
                        rectangle m_absolute; ///< Position relative to window/screen.
                        bool m_enabled; ///< Whether the element accepts events.
                        bool m_visible; ///< Whether the element is drawn.
                        bool m_dirty; ///< Whether the element needs updating.
                        render_data* m_render_data; ///<   -?-
                };

        } // namespace gui

} // namespace nv

#endif // NV_GUI_ELEMENT_HH