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src/dlib/gui_core/gui_core_kernel_2.h  view on Meta::CPAN

// Copyright (C) 2005  Davis E. King (davis@dlib.net), Keita Mochizuki
// License: Boost Software License   See LICENSE.txt for the full license.
#ifndef DLIB_GUI_CORE_KERNEl_2_
#define DLIB_GUI_CORE_KERNEl_2_

#ifdef DLIB_ISO_CPP_ONLY
#error "DLIB_ISO_CPP_ONLY is defined so you can't use this OS dependent code.  Turn DLIB_ISO_CPP_ONLY off if you want to use it."
#endif

#ifdef DLIB_NO_GUI_SUPPORT
#error "DLIB_NO_GUI_SUPPORT is defined so you can't use the GUI code.  Turn DLIB_NO_GUI_SUPPORT off if you want to use it."
#error "Also make sure you have libx11-dev installed on your system"
#endif

#include <string>

#include "gui_core_kernel_abstract.h"
#include "../algs.h"
#include "../threads.h"
#include "../geometry/rectangle.h"
#include "../binary_search_tree.h"
#include <string.h>
#include "../pixel.h"
#include "../unicode.h"


namespace dlib
{

// ----------------------------------------------------------------------------------------

    namespace gui_core_kernel_2_globals
    {
        class event_handler_thread;
        void trigger_user_event_threadproc (void*);

        // This is a forward declaration for a struct that contains any 
        // X11 variables.  This allows me to avoid having any dlib header files
        // include the X11 headers.  Which in turn speeds build times and simplifies
        // build setups.
        struct x11_base_windowstuff;
    }

// ----------------------------------------------------------------------------------------

    void put_on_clipboard (
        const std::string& str
    );

    void put_on_clipboard (
        const std::wstring& str
    );

    void put_on_clipboard (
        const dlib::ustring& str
    );

// ----------------------------------------------------------------------------------------

    void get_from_clipboard (
        std::string& str
    );

    void get_from_clipboard (
        std::wstring& str
    );

    void get_from_clipboard (
        dlib::ustring& str
    );

// ----------------------------------------------------------------------------------------

    class canvas : public rectangle
    {
    public:
        struct pixel
        {
            unsigned char blue;
            unsigned char green;
            unsigned char red;
        private:
            friend class canvas;
            unsigned char _padding;
        };

        ~canvas() {}

        inline pixel* operator[] (
            unsigned long row
        ) const
        {
            DLIB_ASSERT(row < height(),
                "\tpixel* canvas::operator[]"
                << "\n\tyou have to give a row that is less than the height()"
                << "\n\tthis:     " << this
                << "\n\trow:      " << row 
                << "\n\theight(): " << height() 
                );
            unsigned char* temp = bits + row_width*row;
            return reinterpret_cast<pixel*>(temp);
        }

        void fill (
            unsigned char red_,
            unsigned char green_,
            unsigned char blue_
        ) const;

    private:

        friend class gui_core_kernel_2_globals::event_handler_thread;


        canvas (
            unsigned char* bits_,
            unsigned long left_,
            unsigned long top_,            
            unsigned long right_,            
            unsigned long bottom_   
        ) : 
            rectangle(left_,top_,right_,bottom_),
            bits(bits_),
            width_(width()),
            height_(height()),
            row_width(width_*4)
        {}