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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" | |
36 | ||
37 | /* Redisplay the contents of the widget, without first clearing it. */ | |
38 | void | |
345a94f9 RS |
39 | XtNoClearRefreshWidget (widget) |
40 | Widget widget; | |
07bf635f RS |
41 | { |
42 | XEvent event; | |
43 | ||
44 | event.type = Expose; | |
45 | event.xexpose.serial = 0; | |
46 | event.xexpose.send_event = 0; | |
47 | event.xexpose.display = XtDisplay (widget); | |
48 | event.xexpose.window = XtWindow (widget); | |
49 | event.xexpose.x = 0; | |
50 | event.xexpose.y = 0; | |
51 | event.xexpose.width = widget->core.width; | |
52 | event.xexpose.height = widget->core.height; | |
53 | event.xexpose.count = 0; | |
54 | ||
55 | (*widget->core.widget_class->core_class.expose) | |
56 | (widget, &event, (Region)NULL); | |
57 | } | |
58 | ||
59 | ||
60 | /* | |
61 | * Apply a function to all the subwidgets of a given widget recursively. | |
62 | */ | |
63 | void | |
345a94f9 RS |
64 | XtApplyToWidgets (w, proc, arg) |
65 | Widget w; | |
66 | XtApplyToWidgetsProc proc; | |
67 | XtPointer arg; | |
07bf635f RS |
68 | { |
69 | if (XtIsComposite (w)) | |
70 | { | |
71 | CompositeWidget cw = (CompositeWidget) w; | |
72 | /* We have to copy the children list before mapping over it, because | |
73 | the procedure might add/delete elements, which would lose badly. | |
74 | */ | |
75 | int nkids = cw->composite.num_children; | |
76 | Widget *kids = (Widget *) malloc (sizeof (Widget) * nkids); | |
77 | int i; | |
8eefe2b8 | 78 | lwlib_bcopy (cw->composite.children, kids, sizeof (Widget) * nkids); |
07bf635f RS |
79 | for (i = 0; i < nkids; i++) |
80 | /* This prevent us from using gadgets, why is it here? */ | |
81 | /* if (XtIsWidget (kids [i])) */ | |
82 | { | |
83 | /* do the kiddies first in case we're destroying */ | |
84 | XtApplyToWidgets (kids [i], proc, arg); | |
85 | proc (kids [i], arg); | |
86 | } | |
87 | free (kids); | |
88 | } | |
89 | } | |
90 | ||
91 | ||
92 | /* | |
93 | * Apply a function to all the subwidgets of a given widget recursively. | |
94 | * Stop as soon as the function returns non NULL and returns this as a value. | |
95 | */ | |
96 | void * | |
345a94f9 RS |
97 | XtApplyUntilToWidgets (w, proc, arg) |
98 | Widget w; | |
99 | XtApplyUntilToWidgetsProc proc; | |
100 | XtPointer arg; | |
07bf635f RS |
101 | { |
102 | void* result; | |
103 | if (XtIsComposite (w)) | |
104 | { | |
105 | CompositeWidget cw = (CompositeWidget)w; | |
106 | int i; | |
107 | for (i = 0; i < cw->composite.num_children; i++) | |
108 | if (XtIsWidget (cw->composite.children [i])){ | |
109 | result = proc (cw->composite.children [i], arg); | |
110 | if (result) | |
111 | return result; | |
112 | result = XtApplyUntilToWidgets (cw->composite.children [i], proc, | |
113 | arg); | |
114 | if (result) | |
115 | return result; | |
116 | } | |
117 | } | |
118 | return NULL; | |
119 | } | |
120 | ||
121 | ||
122 | /* | |
123 | * Returns a copy of the list of all children of a composite widget | |
124 | */ | |
125 | Widget * | |
345a94f9 RS |
126 | XtCompositeChildren (widget, number) |
127 | Widget widget; | |
128 | unsigned int* number; | |
07bf635f RS |
129 | { |
130 | CompositeWidget cw = (CompositeWidget)widget; | |
131 | Widget* result; | |
132 | int n; | |
133 | int i; | |
134 | ||
135 | if (!XtIsComposite (widget)) | |
136 | { | |
137 | *number = 0; | |
138 | return NULL; | |
139 | } | |
140 | n = cw->composite.num_children; | |
141 | result = (Widget*)XtMalloc (n * sizeof (Widget)); | |
142 | *number = n; | |
143 | for (i = 0; i < n; i++) | |
144 | result [i] = cw->composite.children [i]; | |
145 | return result; | |
146 | } | |
147 | ||
148 | Boolean | |
345a94f9 RS |
149 | XtWidgetBeingDestroyedP (widget) |
150 | Widget widget; | |
07bf635f RS |
151 | { |
152 | return widget->core.being_destroyed; | |
153 | } | |
154 | ||
155 | void | |
345a94f9 RS |
156 | XtSafelyDestroyWidget (widget) |
157 | Widget widget; | |
07bf635f RS |
158 | { |
159 | #if 0 | |
160 | ||
161 | /* this requires IntrinsicI.h (actually, InitialI.h) */ | |
162 | ||
163 | XtAppContext app = XtWidgetToApplicationContext(widget); | |
164 | ||
165 | if (app->dispatch_level == 0) | |
166 | { | |
167 | app->dispatch_level = 1; | |
168 | XtDestroyWidget (widget); | |
169 | /* generates an event so that the event loop will be called */ | |
170 | XChangeProperty (XtDisplay (widget), XtWindow (widget), | |
171 | XA_STRING, XA_STRING, 32, PropModeAppend, NULL, 0); | |
172 | app->dispatch_level = 0; | |
173 | } | |
174 | else | |
175 | XtDestroyWidget (widget); | |
176 | ||
177 | #else | |
178 | abort (); | |
179 | #endif | |
180 | } |