1 /* Copyright Massachusetts Institute of Technology 1985 */
2
3 /*
4
5 Copyright 1985, 1986, 1987 by the Massachusetts Institute of Technology
6
7 Permission to use, copy, modify, and distribute this
8 software and its documentation for any purpose and without
9 fee is hereby granted, provided that the above copyright
10 notice appear in all copies and that both that copyright
11 notice and this permission notice appear in supporting
12 documentation, and that the name of M.I.T. not be used in
13 advertising or publicity pertaining to distribution of the
14 software without specific, written prior permission.
15 M.I.T. makes no representations about the suitability of
16 this software for any purpose. It is provided "as is"
17 without express or implied warranty.
18
19 */
20
21
22
23
24 /*
25 * XMenu: MIT Project Athena, X Window system menu package
26 *
27 * XMenuInsertSelection - Inserts a selection into an XMenu object
28 *
29 * Author: Tony Della Fera, DEC
30 * 20-Nov-85
31 *
32 */
33
34 #include "XMenuInt.h"
35 #include <string.h>
36
37 int
38 XMenuInsertSelection(register XMenu *menu, register int p_num, register int s_num, char *data, char *label, int active)
39 /* Menu object to be modified. */
40 /* Pane number to be modified. */
41 /* Selection number of new selection. */
42 /* Data value. */
43 /* Selection label. */
44 /* Make selection active? */
45 {
46 register XMPane *p_ptr; /* XMPane pointer. */
47 register XMSelect *s_ptr; /* XMSelect pointer. */
48
49 XMSelect *sel; /* Newly created selection. */
50
51 int label_length; /* Label length in characters. */
52 int label_width; /* Label width in pixels. */
53
54 /*
55 * Check for NULL pointers!
56 */
57 if (label == NULL) {
58 _XMErrorCode = XME_ARG_BOUNDS;
59 return(XM_FAILURE);
60 }
61
62 /*
63 * Find the right pane.
64 */
65 p_ptr = _XMGetPanePtr(menu, p_num);
66 if (p_ptr == NULL) return(XM_FAILURE);
67
68 /*
69 * Find the selection number one less than the one specified since that
70 * is the selection after which the insertion will occur.
71 */
72 s_ptr = _XMGetSelectionPtr(p_ptr, (s_num - 1));
73 if (s_ptr == NULL) return(XM_FAILURE);
74
75 /*
76 * Calloc the XMSelect structure.
77 */
78 sel = (XMSelect *)calloc(1, sizeof(XMSelect));
79 if (sel == NULL) {
80 _XMErrorCode = XME_CALLOC;
81 return(XM_FAILURE);
82 }
83
84 /*
85 * Determine label size.
86 */
87 label_length = strlen(label);
88 label_width = XTextWidth(menu->s_fnt_info, label, label_length);
89
90
91 /*
92 * Fill the XMSelect structure.
93 */
94 if (!strcmp (label, "--") || !strcmp (label, "---"))
95 {
96 sel->type = SEPARATOR;
97 sel->active = 0;
98 }
99 else
100 {
101 sel->type = SELECTION;
102 sel->active = active;
103 }
104
105 sel->active = active;
106 sel->serial = -1;
107 sel->label = label;
108 sel->label_width = label_width;
109 sel->label_length = label_length;
110 sel->data = data;
111 sel->parent_p = p_ptr;
112
113 /*
114 * Insert the selection after the selection with the selection
115 * number one less than the desired number for the new selection.
116 */
117 emacs_insque(sel, s_ptr);
118
119 /*
120 * Update the selection count.
121 */
122 p_ptr->s_count++;
123
124 /*
125 * Schedule a recompute.
126 */
127 menu->recompute = 1;
128
129 /*
130 * Return the selection number just inserted.
131 */
132 _XMErrorCode = XME_NO_ERROR;
133 return(s_num);
134 }