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[emacs.git] / oldXMenu / InsPane.c
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1 #include "copyright.h"
3 /* $Header: /u/src/emacs/19.0/oldXMenu/RCS/InsPane.c,v 1.1 1992/04/11 22:10:19 jimb Exp $ */
4 /* Copyright Massachusetts Institute of Technology 1985 */
6 /*
7 * XMenu: MIT Project Athena, X Window system menu package
9 * XMenuInsertPane - Inserts a pane into an XMenu object in
10 * a particular position.
12 * Author: Tony Della Fera, DEC
13 * 20-Nov-85
17 #include <config.h>
18 #include "XMenuInt.h"
20 int
21 XMenuInsertPane(menu, p_num, label, active)
22 register XMenu *menu; /* Menu object to be modified. */
23 register int p_num; /* Pane number of new pane. */
24 char *label; /* Selection label. */
25 int active; /* Make selection active? */
27 register XMPane *p_ptr; /* XMPane pointer. */
28 register XMPane *pane; /* Newly created pane. */
29 register XMSelect *select; /* Initial selection for the new pane. */
31 int label_length; /* Label length in characters. */
32 int label_width; /* Label width in pixels. */
35 * Check for NULL pointers!
37 if (label == NULL) {
38 _XMErrorCode = XME_ARG_BOUNDS;
39 return(XM_FAILURE);
43 * Find the pane number one less than the one specified since that
44 * is the pane after which the insertion will occur.
46 p_ptr = _XMGetPanePtr(menu, (p_num - 1));
47 if (p_ptr == NULL) return(XM_FAILURE);
50 * Calloc the XMPane structure and the initial XMSelect.
52 pane = (XMPane *)calloc(1, sizeof(XMPane));
53 if (pane == NULL) {
54 _XMErrorCode = XME_CALLOC;
55 return(XM_FAILURE);
57 select = (XMSelect *)calloc(1, sizeof(XMSelect));
58 if (select == NULL) {
59 _XMErrorCode = XME_CALLOC;
60 return(XM_FAILURE);
64 * Determine label size.
66 label_length = strlen(label);
67 label_width = XTextWidth(menu->p_fnt_info, label, label_length);
70 * Set up the initial selection.
71 * Values not explicitly set are zeroed by calloc.
73 select->next = select;
74 select->prev = select;
75 select->type = SL_HEADER;
76 select->serial = -1;
77 select->parent_p = pane;
80 * Fill the XMPane structure.
82 pane->type = PANE;
83 pane->active = active;
84 pane->serial = -1;
85 pane->label = label;
86 pane->label_width = label_width;
87 pane->label_length = label_length;
88 pane->s_list = select;
91 * Insert the pane after the pane with the pane
92 * number one less than the desired number for the
93 * new pane.
95 emacs_insque(pane, p_ptr);
98 * Update the pane count.
100 menu->p_count++;
103 * Schedule a recompute.
105 menu->recompute = 1;
108 * Return the number of the pane just added.
110 _XMErrorCode = XME_NO_ERROR;
111 return(p_num);