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[gnu-emacs] / oldXMenu / Post.c

diff --git a/oldXMenu/Post.c b/oldXMenu/Post.c
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+++ b/oldXMenu/Post.c
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+#include "copyright.h"
+
+/* $Header: /u/src/emacs/19.0/oldXMenu/RCS/Post.c,v 1.1 1992/04/11 22:10:20 jimb Exp $ */
+/* Copyright    Massachusetts Institute of Technology    1985  */
+
+/*
+ * XMenu:      MIT Project Athena, X Window system menu package
+ *
+ *     XMenuPost -     Maps a given menu to the display and activates
+ *                     the menu for user selection.  The user is allowed to
+ *                     specify the mouse button event mask that will be used
+ *                     to identify a selection request.  When a selection 
+ *                     request is received (i.e., when the specified mouse
+ *                     event occurs) the data  returned will be either the
+ *                     data associated with the particular selection active
+ *                     at the time of the selection request or NULL if no
+ *                     selection was active.  A menu selection is shown to
+ *                     be active by placing a highlight box around the
+ *                     selection as the mouse cursor enters its active
+ *                     region.  Inactive selections will not be highlighted.
+ *                     As the mouse cursor moved from one menu pane
+ *                     to another menu pane the pane being entered is raised
+ *                     and activated and the pane being left is deactivated.
+ *                     If an error occurs NULL will be returned with the
+ *                     p_num set to POST_ERROR, s_num set to
+ *                     NO_SELECTION and _XMErrorCode set to an
+ *                     appropriate value.
+ *                     Every time the routine returns successfully the
+ *                     p_num and s_num indices will be set to indicate
+ *                     the currently active pane and/or selection.  If the
+ *                     mouse was not in a selection window at the time
+ *                     s_num will be set to NO_SELECTION.
+ *
+ *     Author:         Tony Della Fera, DEC
+ *                     August, 1984
+ *
+ */
+
+#include "XMenuInt.h"
+
+char *
+XMenuPost(display, menu, p_num, s_num, x_pos, y_pos, event_mask)
+    register Display *display; /* Previously opened display. */
+    register XMenu *menu;      /* Menu to post. */
+    register int *p_num;       /* Pane number selected. */
+    register int *s_num;       /* Selection number selected. */
+    register int x_pos;                /* X coordinate of menu position. */
+    register int y_pos;                /* Y coordinate of menu position. */
+    int event_mask;            /* Mouse button event mask. */
+{
+    register int stat;         /* Routine call return status. */
+    char *data;                        /* Return data. */
+
+    /*
+     * Set up initial pane and selection assumptions.
+     */
+
+    /*
+     * Make the procedure call.
+     */
+    stat = XMenuActivate(
+                        display, 
+                        menu,
+                        p_num, s_num, 
+                        x_pos, y_pos, 
+                        event_mask, 
+                        &data);
+
+    /*
+     * Check the return value and return accordingly.
+     */
+    switch (stat) {
+       case XM_FAILURE:
+           *p_num = POST_ERROR;
+           *s_num = NO_SELECTION;
+           return(NULL);
+       case XM_NO_SELECT:
+       case XM_IA_SELECT:
+           *s_num = NO_SELECTION;
+           return(NULL);
+       case XM_SUCCESS:
+       default:
+           return(data);
+    }
+}