#include "base.h"

const I32 CHECKBOX_SIZE = 14;

void gui_checkbox_draw_fn( void* ptr ) {
  GUI_CHECKBOX* check = (GUI_CHECKBOX*)ptr;

  I32 x = gui_relx( check );
  I32 y = gui_rely( check );

  I32 half = CHECKBOX_SIZE / 2;

  CLR col = gui_is_fg_window( check )? ui_clr.border : ui_clr.border_inactive;
  gui_draw_frect( x, y+2, CHECKBOX_SIZE, CHECKBOX_SIZE, col );
  gui_draw_frect( x+1, y+3, CHECKBOX_SIZE-2, CHECKBOX_SIZE-2, ui_clr.bg_sec );

  if( *check->pval )
    gui_draw_str( x + half, y, ALIGN_C, FNT_JPN12, ui_clr.txt, "x" );

  gui_draw_str( x + CHECKBOX_SIZE + 2, y, ALIGN_L, FNT_JPN12, ui_clr.txt, check->name );
}

void gui_checkbox_input_fn( void* ptr ) {
  GUI_CHECKBOX* check = (GUI_CHECKBOX*)ptr;

  I32 x = gui_relx( check );
  I32 y = gui_rely( check );

  U8 m1 = gui_mbutton_down( 0 );
  I32 mx, my;
  gui_cursor_pos( &mx, &my );

  gui_draw_get_str_bounds( &check->w, 0, FNT_JPN12, check->name );
  check->w += CHECKBOX_SIZE + 2;

  U8 inbounds = mx >= x && mx <= x + check->w && my >= y && my <= y + check->h;

  if( !m1 ) {
    // checkbox could be destroyed by callback
    U8 was_held = check->held;
    check->held = 0;
    if( inbounds && was_held ) {
      *check->pval = !*check->pval;
      if( check->cb )
        check->cb( check );
    }

    return;
  }

  if( inbounds )
    check->held = 1;
}

GUI_CHECKBOX* gui_checkbox( I32 x, I32 y, const char* title, U8* pval ) {
  if( !gui_check_target() ) return 0;

  GUI_CHECKBOX* check = new GUI_CHECKBOX;
  check->x = x;
  check->y = y;
  check->cb = 0;
  check->ybound = check->h = 16;
  check->draw_fn = gui_checkbox_draw_fn;
  check->input_fn = gui_checkbox_input_fn;

  check->pval = pval;

  check->parent = _gui.cur_view;
  strcpy( check->name, title );

  gui_draw_get_str_bounds( &check->w, 0, FNT_JPN12, check->name );
  check->w += CHECKBOX_SIZE + 2;
  check->xbound = check->w;
  check->ybound = check->h;

  gui_get_view()->children.push( check );
  return check;
}