contrib/ncurses-5.4/menu/m_attribs.c

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  28
  29 /****************************************************************************
  30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
  31  ****************************************************************************/
  32
  33 /***************************************************************************
  34 * Module m_attribs                                                         *
  35 * Control menus display attributes                                         *
  36 ***************************************************************************/
  37
  38 #include "menu.priv.h"
  39
  40 MODULE_ID("$Id: m_attribs.c,v 1.12 2003/11/08 20:54:20 tom Exp $")
  41
  42 /* Macro to redraw menu if it is posted and changed */
  43 #define Refresh_Menu(menu) \
  44    if ( (menu) && ((menu)->status & _POSTED) )\
  45    {\
  46       _nc_Draw_Menu( menu );\
  47       _nc_Show_Menu( menu );\
  48    }
  49
  50 /* "Template" macro to generate a function to set a menus attribute */
  51 #define GEN_MENU_ATTR_SET_FCT( name ) \
  52 NCURSES_IMPEXP int NCURSES_API set_menu_ ## name (MENU * menu, chtype attr)\
  53 {\
  54    if (!(attr==A_NORMAL || (attr & A_ATTRIBUTES)==attr))\
  55       RETURN(E_BAD_ARGUMENT);\
  56    if (menu && ( menu -> name != attr))\
  57      {\
  58        (menu -> name) = attr;\
  59        Refresh_Menu(menu);\
  60      }\
  61    Normalize_Menu( menu ) -> name = attr;\
  62    RETURN(E_OK);\
  63 }
  64
  65 /* "Template" macro to generate a function to get a menu's attribute */
  66 #define GEN_MENU_ATTR_GET_FCT( name ) \
  67 NCURSES_IMPEXP chtype NCURSES_API menu_ ## name (const MENU * menu)\
  68 {\
  69    return (Normalize_Menu( menu ) -> name);\
  70 }
  71
  72 /*---------------------------------------------------------------------------
  73 |   Facility      :  libnmenu
  74 |   Function      :  int set_menu_fore(MENU *menu, chtype attr)
  75 |
  76 |   Description   :  Set the attribute for selectable items. In single-
  77 |                    valued menus this is used to highlight the current
  78 |                    item ((i.e. where the cursor is), in multi-valued
  79 |                    menus this is used to highlight the selected items.
  80 |
  81 |   Return Values :  E_OK              - success
  82 |                    E_BAD_ARGUMENT    - an invalid value has been passed
  83 +--------------------------------------------------------------------------*/
  84 GEN_MENU_ATTR_SET_FCT( fore )
  85
  86 /*---------------------------------------------------------------------------
  87 |   Facility      :  libnmenu
  88 |   Function      :  chtype menu_fore(const MENU* menu)
  89 |
  90 |   Description   :  Return the attribute used for selectable items that
  91 |                    are current (single-valued menu) or selected (multi-
  92 |                    valued menu).
  93 |
  94 |   Return Values :  Attribute value
  95 +--------------------------------------------------------------------------*/
  96 GEN_MENU_ATTR_GET_FCT( fore )
  97
  98 /*---------------------------------------------------------------------------
  99 |   Facility      :  libnmenu
 100 |   Function      :  int set_menu_back(MENU *menu, chtype attr)
 101 |
 102 |   Description   :  Set the attribute for selectable but not yet selected
 103 |                    items.
 104 |
 105 |   Return Values :  E_OK             - success
 106 |                    E_BAD_ARGUMENT   - an invalid value has been passed
 107 +--------------------------------------------------------------------------*/
 108 GEN_MENU_ATTR_SET_FCT( back )
 109
 110 /*---------------------------------------------------------------------------
 111 |   Facility      :  libnmenu
 112 |   Function      :  chtype menu_back(const MENU *menu)
 113 |
 114 |   Description   :  Return the attribute used for selectable but not yet
 115 |                    selected items.
 116 |
 117 |   Return Values :  Attribute value
 118 +--------------------------------------------------------------------------*/
 119 GEN_MENU_ATTR_GET_FCT( back )
 120
 121 /*---------------------------------------------------------------------------
 122 |   Facility      :  libnmenu
 123 |   Function      :  int set_menu_grey(MENU *menu, chtype attr)
 124 |
 125 |   Description   :  Set the attribute for unselectable items.
 126 |
 127 |   Return Values :  E_OK             - success
 128 |                    E_BAD_ARGUMENT   - an invalid value has been passed
 129 +--------------------------------------------------------------------------*/
 130 GEN_MENU_ATTR_SET_FCT( grey )
 131
 132 /*---------------------------------------------------------------------------
 133 |   Facility      :  libnmenu
 134 |   Function      :  chtype menu_grey(const MENU *menu)
 135 |
 136 |   Description   :  Return the attribute used for non-selectable items
 137 |
 138 |   Return Values :  Attribute value
 139 +--------------------------------------------------------------------------*/
 140 GEN_MENU_ATTR_GET_FCT( grey )
 141 /* m_attribs.c ends here */