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07bf635f RS |
1 | /* Defines some widget utility functions. |
2 | Copyright (C) 1992 Lucid, Inc. | |
3 | ||
4 | This file is part of the Lucid Widget Library. | |
5 | ||
6 | The Lucid Widget Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
9 | any later version. | |
10 | ||
11 | The Lucid Widget Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
07bf635f | 20 | |
d6c5b98a RS |
21 | #ifdef HAVE_CONFIG_H |
22 | #include <config.h> | |
23 | #endif | |
24 | ||
5750ebd8 KH |
25 | /* Definitions of these in config.h can cause |
26 | declaration conflicts later on between declarations for index | |
27 | and declarations for strchr. This file doesn't use | |
28 | index and rindex, so cancel them. */ | |
29 | #undef index | |
30 | #undef rindex | |
31 | ||
07bf635f RS |
32 | #include <X11/Xatom.h> |
33 | #include <X11/IntrinsicP.h> | |
34 | #include <X11/ObjectP.h> | |
35 | #include "lwlib-utils.h" | |
123c6301 | 36 | #include "lwlib.h" |
07bf635f RS |
37 | |
38 | /* Redisplay the contents of the widget, without first clearing it. */ | |
39 | void | |
345a94f9 RS |
40 | XtNoClearRefreshWidget (widget) |
41 | Widget widget; | |
07bf635f RS |
42 | { |
43 | XEvent event; | |
44 | ||
45 | event.type = Expose; | |
46 | event.xexpose.serial = 0; | |
47 | event.xexpose.send_event = 0; | |
48 | event.xexpose.display = XtDisplay (widget); | |
49 | event.xexpose.window = XtWindow (widget); | |
50 | event.xexpose.x = 0; | |
51 | event.xexpose.y = 0; | |
52 | event.xexpose.width = widget->core.width; | |
53 | event.xexpose.height = widget->core.height; | |
54 | event.xexpose.count = 0; | |
55 | ||
56 | (*widget->core.widget_class->core_class.expose) | |
57 | (widget, &event, (Region)NULL); | |
58 | } | |
59 | ||
60 | ||
61 | /* | |
62 | * Apply a function to all the subwidgets of a given widget recursively. | |
63 | */ | |
64 | void | |
345a94f9 RS |
65 | XtApplyToWidgets (w, proc, arg) |
66 | Widget w; | |
67 | XtApplyToWidgetsProc proc; | |
68 | XtPointer arg; | |
07bf635f RS |
69 | { |
70 | if (XtIsComposite (w)) | |
71 | { | |
72 | CompositeWidget cw = (CompositeWidget) w; | |
73 | /* We have to copy the children list before mapping over it, because | |
74 | the procedure might add/delete elements, which would lose badly. | |
75 | */ | |
76 | int nkids = cw->composite.num_children; | |
77 | Widget *kids = (Widget *) malloc (sizeof (Widget) * nkids); | |
78 | int i; | |
cdefcd82 DL |
79 | lwlib_bcopy ((char *) cw->composite.children, (char *) kids, |
80 | sizeof (Widget) * nkids); | |
07bf635f RS |
81 | for (i = 0; i < nkids; i++) |
82 | /* This prevent us from using gadgets, why is it here? */ | |
83 | /* if (XtIsWidget (kids [i])) */ | |
84 | { | |
85 | /* do the kiddies first in case we're destroying */ | |
86 | XtApplyToWidgets (kids [i], proc, arg); | |
87 | proc (kids [i], arg); | |
88 | } | |
89 | free (kids); | |
90 | } | |
91 | } | |
92 | ||
93 | ||
94 | /* | |
95 | * Apply a function to all the subwidgets of a given widget recursively. | |
96 | * Stop as soon as the function returns non NULL and returns this as a value. | |
97 | */ | |
98 | void * | |
345a94f9 RS |
99 | XtApplyUntilToWidgets (w, proc, arg) |
100 | Widget w; | |
101 | XtApplyUntilToWidgetsProc proc; | |
102 | XtPointer arg; | |
07bf635f RS |
103 | { |
104 | void* result; | |
105 | if (XtIsComposite (w)) | |
106 | { | |
107 | CompositeWidget cw = (CompositeWidget)w; | |
108 | int i; | |
109 | for (i = 0; i < cw->composite.num_children; i++) | |
110 | if (XtIsWidget (cw->composite.children [i])){ | |
111 | result = proc (cw->composite.children [i], arg); | |
112 | if (result) | |
113 | return result; | |
114 | result = XtApplyUntilToWidgets (cw->composite.children [i], proc, | |
115 | arg); | |
116 | if (result) | |
117 | return result; | |
118 | } | |
119 | } | |
120 | return NULL; | |
121 | } | |
122 | ||
123 | ||
124 | /* | |
125 | * Returns a copy of the list of all children of a composite widget | |
126 | */ | |
127 | Widget * | |
345a94f9 RS |
128 | XtCompositeChildren (widget, number) |
129 | Widget widget; | |
130 | unsigned int* number; | |
07bf635f RS |
131 | { |
132 | CompositeWidget cw = (CompositeWidget)widget; | |
133 | Widget* result; | |
134 | int n; | |
135 | int i; | |
136 | ||
137 | if (!XtIsComposite (widget)) | |
138 | { | |
139 | *number = 0; | |
140 | return NULL; | |
141 | } | |
142 | n = cw->composite.num_children; | |
143 | result = (Widget*)XtMalloc (n * sizeof (Widget)); | |
144 | *number = n; | |
145 | for (i = 0; i < n; i++) | |
146 | result [i] = cw->composite.children [i]; | |
147 | return result; | |
148 | } | |
149 | ||
150 | Boolean | |
345a94f9 RS |
151 | XtWidgetBeingDestroyedP (widget) |
152 | Widget widget; | |
07bf635f RS |
153 | { |
154 | return widget->core.being_destroyed; | |
155 | } | |
156 | ||
157 | void | |
345a94f9 RS |
158 | XtSafelyDestroyWidget (widget) |
159 | Widget widget; | |
07bf635f RS |
160 | { |
161 | #if 0 | |
162 | ||
163 | /* this requires IntrinsicI.h (actually, InitialI.h) */ | |
164 | ||
165 | XtAppContext app = XtWidgetToApplicationContext(widget); | |
166 | ||
167 | if (app->dispatch_level == 0) | |
168 | { | |
169 | app->dispatch_level = 1; | |
170 | XtDestroyWidget (widget); | |
171 | /* generates an event so that the event loop will be called */ | |
172 | XChangeProperty (XtDisplay (widget), XtWindow (widget), | |
173 | XA_STRING, XA_STRING, 32, PropModeAppend, NULL, 0); | |
174 | app->dispatch_level = 0; | |
175 | } | |
176 | else | |
177 | XtDestroyWidget (widget); | |
178 | ||
179 | #else | |
180 | abort (); | |
181 | #endif | |
182 | } |