form/frm_post.c

   1 /****************************************************************************
   2  * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
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  28
  29 /****************************************************************************
  30  *   Author:  Juergen Pfeifer, 1995,1997                                    *
  31  *   Contact: http://www.familiepfeifer.de/Contact.aspx?Lang=en             *
  32  ****************************************************************************/
  33 #include "form.priv.h"
  34
  35 MODULE_ID("$Id: frm_post.c,v 1.6 2002/07/06 15:33:27 juergen 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   if (!form)
  58     RETURN(E_BAD_ARGUMENT);
  59
  60   if (form->status & _POSTED)
  61     RETURN(E_POSTED);
  62
  63   if (!(form->field))
  64     RETURN(E_NOT_CONNECTED);
  65
  66   formwin = Get_Form_Window(form);
  67   if ((form->cols > getmaxx(formwin)) || (form->rows > getmaxy(formwin)))
  68     RETURN(E_NO_ROOM);
  69
  70   /* reset form->curpage to an invald value. This forces Set_Form_Page
  71      to do the page initialization which is required by post_form.
  72   */
  73   page = form->curpage;
  74   form->curpage = -1;
  75   if ((err = _nc_Set_Form_Page(form,page,form->current))!=E_OK)
  76     RETURN(err);
  77
  78   form->status |= _POSTED;
  79
  80   Call_Hook(form,forminit);
  81   Call_Hook(form,fieldinit);
  82
  83   _nc_Refresh_Current_Field(form);
  84   RETURN(E_OK);
  85 }
  86
  87 /*---------------------------------------------------------------------------
  88 |   Facility      :  libnform
  89 |   Function      :  int unpost_form(FORM * form)
  90 |
  91 |   Description   :  Erase form from its associated subwindow.
  92 |
  93 |   Return Values :  E_OK            - success
  94 |                    E_BAD_ARGUMENT  - invalid form pointer
  95 |                    E_NOT_POSTED    - form isn't posted
  96 |                    E_BAD_STATE     - called from a hook routine
  97 +--------------------------------------------------------------------------*/
  98 NCURSES_EXPORT(int)
  99 unpost_form (FORM * form)
 100 {
 101   if (!form)
 102     RETURN(E_BAD_ARGUMENT);
 103
 104   if (!(form->status & _POSTED))
 105     RETURN(E_NOT_POSTED);
 106
 107   if (form->status & _IN_DRIVER)
 108     RETURN(E_BAD_STATE);
 109
 110   Call_Hook(form,fieldterm);
 111   Call_Hook(form,formterm);
 112
 113   werase(Get_Form_Window(form));
 114   delwin(form->w);
 115   form->w = (WINDOW *)0;
 116   form->status &= ~_POSTED;
 117   RETURN(E_OK);
 118 }
 119
 120 /* frm_post.c ends here */