contrib/ncurses/form/frm_post.c

   1 /****************************************************************************
   2  * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
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  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
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  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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  26  * authorization.                                                           *
  27  ****************************************************************************/
  28
  29 /****************************************************************************
  30  *   Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1995,1997            *
  31  ****************************************************************************/
  32 #include "form.priv.h"
  33
  34 MODULE_ID("$Id: frm_post.c,v 1.5 2000/12/10 02:09:37 tom Exp $")
  35
  36 /*---------------------------------------------------------------------------
  37 |   Facility      :  libnform
  38 |   Function      :  int post_form(FORM * form)
  39 |
  40 |   Description   :  Writes the form into its associated subwindow.
  41 |
  42 |   Return Values :  E_OK              - success
  43 |                    E_BAD_ARGUMENT    - invalid form pointer
  44 |                    E_POSTED          - form already posted
  45 |                    E_NOT_CONNECTED   - no fields connected to form
  46 |                    E_NO_ROOM         - form doesn't fit into subwindow
  47 |                    E_SYSTEM_ERROR    - system error
  48 +--------------------------------------------------------------------------*/
  49 NCURSES_EXPORT(int)
  50 post_form (FORM * form)
  51 {
  52   WINDOW *formwin;
  53   int err;
  54   int page;
  55
  56   if (!form)
  57     RETURN(E_BAD_ARGUMENT);
  58
  59   if (form->status & _POSTED)
  60     RETURN(E_POSTED);
  61
  62   if (!(form->field))
  63     RETURN(E_NOT_CONNECTED);
  64
  65   formwin = Get_Form_Window(form);
  66   if ((form->cols > getmaxx(formwin)) || (form->rows > getmaxy(formwin)))
  67     RETURN(E_NO_ROOM);
  68
  69   /* reset form->curpage to an invald value. This forces Set_Form_Page
  70      to do the page initialization which is required by post_form.
  71   */
  72   page = form->curpage;
  73   form->curpage = -1;
  74   if ((err = _nc_Set_Form_Page(form,page,form->current))!=E_OK)
  75     RETURN(err);
  76
  77   form->status |= _POSTED;
  78
  79   Call_Hook(form,forminit);
  80   Call_Hook(form,fieldinit);
  81
  82   _nc_Refresh_Current_Field(form);
  83   RETURN(E_OK);
  84 }
  85
  86 /*---------------------------------------------------------------------------
  87 |   Facility      :  libnform
  88 |   Function      :  int unpost_form(FORM * form)
  89 |
  90 |   Description   :  Erase form from its associated subwindow.
  91 |
  92 |   Return Values :  E_OK            - success
  93 |                    E_BAD_ARGUMENT  - invalid form pointer
  94 |                    E_NOT_POSTED    - form isn't posted
  95 |                    E_BAD_STATE     - called from a hook routine
  96 +--------------------------------------------------------------------------*/
  97 NCURSES_EXPORT(int)
  98 unpost_form (FORM * form)
  99 {
 100   if (!form)
 101     RETURN(E_BAD_ARGUMENT);
 102
 103   if (!(form->status & _POSTED))
 104     RETURN(E_NOT_POSTED);
 105
 106   if (form->status & _IN_DRIVER)
 107     RETURN(E_BAD_STATE);
 108
 109   Call_Hook(form,fieldterm);
 110   Call_Hook(form,formterm);
 111
 112   werase(Get_Form_Window(form));
 113   delwin(form->w);
 114   form->w = (WINDOW *)0;
 115   form->status &= ~_POSTED;
 116   RETURN(E_OK);
 117 }
 118
 119 /* frm_post.c ends here */