contrib/ncurses/form/frm_post.c

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   2  * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc.              *
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  28
  29 /****************************************************************************
  30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
  31  ****************************************************************************/
  32
  33 #include "form.priv.h"
  34
  35 MODULE_ID("$Id: frm_post.c,v 1.9 2004/12/11 22:19:06 tom Exp $")
  36
  37 /*---------------------------------------------------------------------------
  38 |   Facility      :  libnform
  39 |   Function      :  int post_form(FORM * form)
  40 |
  41 |   Description   :  Writes the form into its associated subwindow.
  42 |
  43 |   Return Values :  E_OK              - success
  44 |                    E_BAD_ARGUMENT    - invalid form pointer
  45 |                    E_POSTED          - form already posted
  46 |                    E_NOT_CONNECTED   - no fields connected to form
  47 |                    E_NO_ROOM         - form doesn't fit into subwindow
  48 |                    E_SYSTEM_ERROR    - system error
  49 +--------------------------------------------------------------------------*/
  50 NCURSES_EXPORT(int)
  51 post_form(FORM *form)
  52 {
  53   WINDOW *formwin;
  54   int err;
  55   int page;
  56
  57   T((T_CALLED("post_form(%p)"), form));
  58
  59   if (!form)
  60     RETURN(E_BAD_ARGUMENT);
  61
  62   if (form->status & _POSTED)
  63     RETURN(E_POSTED);
  64
  65   if (!(form->field))
  66     RETURN(E_NOT_CONNECTED);
  67
  68   formwin = Get_Form_Window(form);
  69   if ((form->cols > getmaxx(formwin)) || (form->rows > getmaxy(formwin)))
  70     RETURN(E_NO_ROOM);
  71
  72   /* reset form->curpage to an invald value. This forces Set_Form_Page
  73      to do the page initialization which is required by post_form.
  74    */
  75   page = form->curpage;
  76   form->curpage = -1;
  77   if ((err = _nc_Set_Form_Page(form, page, form->current)) != E_OK)
  78     RETURN(err);
  79
  80   form->status |= _POSTED;
  81
  82   Call_Hook(form, forminit);
  83   Call_Hook(form, fieldinit);
  84
  85   _nc_Refresh_Current_Field(form);
  86   RETURN(E_OK);
  87 }
  88
  89 /*---------------------------------------------------------------------------
  90 |   Facility      :  libnform
  91 |   Function      :  int unpost_form(FORM * form)
  92 |
  93 |   Description   :  Erase form from its associated subwindow.
  94 |
  95 |   Return Values :  E_OK            - success
  96 |                    E_BAD_ARGUMENT  - invalid form pointer
  97 |                    E_NOT_POSTED    - form isn't posted
  98 |                    E_BAD_STATE     - called from a hook routine
  99 +--------------------------------------------------------------------------*/
 100 NCURSES_EXPORT(int)
 101 unpost_form(FORM *form)
 102 {
 103   T((T_CALLED("unpost_form(%p)"), form));
 104
 105   if (!form)
 106     RETURN(E_BAD_ARGUMENT);
 107
 108   if (!(form->status & _POSTED))
 109     RETURN(E_NOT_POSTED);
 110
 111   if (form->status & _IN_DRIVER)
 112     RETURN(E_BAD_STATE);
 113
 114   Call_Hook(form, fieldterm);
 115   Call_Hook(form, formterm);
 116
 117   werase(Get_Form_Window(form));
 118   delwin(form->w);
 119   form->w = (WINDOW *)0;
 120   form->status &= ~_POSTED;
 121   RETURN(E_OK);
 122 }
 123
 124 /* frm_post.c ends here */