oldXMenu/Post.c

   1 /* Copyright    Massachusetts Institute of Technology    1985   */
   2
   3 #include "copyright.h"
   4
   5
   6 /*
   7  * XMenu:       MIT Project Athena, X Window system menu package
   8  *
   9  *      XMenuPost -     Maps a given menu to the display and activates
  10  *                      the menu for user selection.  The user is allowed to
  11  *                      specify the mouse button event mask that will be used
  12  *                      to identify a selection request.  When a selection
  13  *                      request is received (i.e., when the specified mouse
  14  *                      event occurs) the data  returned will be either the
  15  *                      data associated with the particular selection active
  16  *                      at the time of the selection request or NULL if no
  17  *                      selection was active.  A menu selection is shown to
  18  *                      be active by placing a highlight box around the
  19  *                      selection as the mouse cursor enters its active
  20  *                      region.  Inactive selections will not be highlighted.
  21  *                      As the mouse cursor moved from one menu pane
  22  *                      to another menu pane the pane being entered is raised
  23  *                      and activated and the pane being left is deactivated.
  24  *                      If an error occurs NULL will be returned with the
  25  *                      p_num set to POST_ERROR, s_num set to
  26  *                      NO_SELECTION and _XMErrorCode set to an
  27  *                      appropriate value.
  28  *                      Every time the routine returns successfully the
  29  *                      p_num and s_num indices will be set to indicate
  30  *                      the currently active pane and/or selection.  If the
  31  *                      mouse was not in a selection window at the time
  32  *                      s_num will be set to NO_SELECTION.
  33  *
  34  *      Author:         Tony Della Fera, DEC
  35  *                      August, 1984
  36  *
  37  */
  38
  39 #include "XMenuInt.h"
  40
  41 char *
  42 XMenuPost(register Display *display, register XMenu *menu, register int *p_num, register int *s_num, register int x_pos, register int y_pos, int event_mask)
  43                                 /* Previously opened display. */
  44                                 /* Menu to post. */
  45                                 /* Pane number selected. */
  46                                 /* Selection number selected. */
  47                                 /* X coordinate of menu position. */
  48                                 /* Y coordinate of menu position. */
  49                                 /* Mouse button event mask. */
  50 {
  51     register int stat;          /* Routine call return status. */
  52     char *data;                 /* Return data. */
  53
  54     /*
  55      * Set up initial pane and selection assumptions.
  56      */
  57
  58     /*
  59      * Make the procedure call.
  60      */
  61     stat = XMenuActivate(
  62                          display,
  63                          menu,
  64                          p_num, s_num,
  65                          x_pos, y_pos,
  66                          event_mask,
  67                          &data, 0);
  68
  69     /*
  70      * Check the return value and return accordingly.
  71      */
  72     switch (stat) {
  73         case XM_FAILURE:
  74             *p_num = POST_ERROR;
  75             *s_num = NO_SELECTION;
  76             return(NULL);
  77         case XM_NO_SELECT:
  78         case XM_IA_SELECT:
  79             *s_num = NO_SELECTION;
  80             return(NULL);
  81         case XM_SUCCESS:
  82         default:
  83             return(data);
  84     }
  85 }
  86