ui.ceu

#ifndef _UI_CEU
#define _UI_CEU

#include "sdl.ceu"

native @const _UI_ALIGN_LEFT, _UI_ALIGN_CENTER, _UI_ALIGN_RIGHT,
              _UI_ALIGN_TOP,  _UI_ALIGN_MIDDLE, _UI_ALIGN_BOTTOM;

native @pure _UI_align(), _UI_align_bg();

#define UI_SDL_COLOR_REF(to,fr) \
    finalize                    \
        to = _SDL_COLOR_REF(fr);\
    with                        \
        nothing;                \
    end

native do

    enum {
        UI_ALIGN_LEFT = 0,
        UI_ALIGN_CENTER,
        UI_ALIGN_RIGHT
    };
    enum {
        UI_ALIGN_TOP = 0,
        UI_ALIGN_MIDDLE,
        UI_ALIGN_BOTTOM,
    };

    int UI_align (int p, int dim, int align)
    {
        switch (align)
        {
            case UI_ALIGN_LEFT:
            //case UI_ALIGN_TOP:
                return p;

            case UI_ALIGN_CENTER:
            //case UI_ALIGN_MIDDLE:
                return p - dim/2;

            case UI_ALIGN_RIGHT:
            //case UI_ALIGN_BOTTOM:
                return p - dim;
        }
    }

    int UI_align_bg (int p_out, int dim_out, int dim_in, int align)
    {
        switch (align)
        {
            case UI_ALIGN_LEFT:
            //case UI_ALIGN_TOP:
                return p_out;

            case UI_ALIGN_CENTER:
            //case UI_ALIGN_MIDDLE:
                return p_out + (dim_out - dim_in)/2;

            case UI_ALIGN_RIGHT:
            //case UI_ALIGN_BOTTOM:
                return p_out + (dim_out - dim_in);
        }
    }
end

interface UI with
    //event void           ok_redraw_pre;
    //event void           ok_redraw_pos;
    event void           ok_clicked;
    //event _SDL_Point*    go_move;

    var   _SDL_Renderer& ren;
    var   SDL_Rect       rect;
    var   bool           should_redim;
    var   SDL_Color?     bg_clr;

    var   int            align_x;
    var   int            align_y;
    var   int            align_bg_x;
    var   int            align_bg_y;

    function @rec (SDL_Rect* rect)=>void go;
    function @rec (SDL_Rect* bg, bool should_redim_)=>void go_bg;
end

#endif