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07bf635f | 1 | /* Defines some widget utility functions. |
4424d48a | 2 | Copyright (C) 1992 Lucid, Inc. |
73b0cd50 | 3 | Copyright (C) 1994, 2001-2011 Free Software Foundation, Inc. |
07bf635f RS |
4 | |
5 | This file is part of the Lucid Widget Library. | |
6 | ||
177c0ea7 | 7 | The Lucid Widget Library is free software; you can redistribute it and/or |
07bf635f RS |
8 | modify it under the terms of the GNU General Public License as published by |
9 | the Free Software Foundation; either version 1, or (at your option) | |
10 | any later version. | |
11 | ||
12 | The Lucid Widget Library is distributed in the hope that it will be useful, | |
177c0ea7 | 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
07bf635f RS |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
364c38d3 LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
07bf635f | 21 | |
d6c5b98a RS |
22 | #ifdef HAVE_CONFIG_H |
23 | #include <config.h> | |
24 | #endif | |
25 | ||
5750ebd8 KH |
26 | /* Definitions of these in config.h can cause |
27 | declaration conflicts later on between declarations for index | |
28 | and declarations for strchr. This file doesn't use | |
29 | index and rindex, so cancel them. */ | |
30 | #undef index | |
31 | #undef rindex | |
32 | ||
d7306fe6 | 33 | #include <setjmp.h> |
2f96293d RS |
34 | #include "../src/lisp.h" |
35 | ||
07bf635f RS |
36 | #include <X11/Xatom.h> |
37 | #include <X11/IntrinsicP.h> | |
38 | #include <X11/ObjectP.h> | |
39 | #include "lwlib-utils.h" | |
123c6301 | 40 | #include "lwlib.h" |
07bf635f RS |
41 | |
42 | /* Redisplay the contents of the widget, without first clearing it. */ | |
43 | void | |
c3174d16 | 44 | XtNoClearRefreshWidget (Widget widget) |
07bf635f RS |
45 | { |
46 | XEvent event; | |
47 | ||
48 | event.type = Expose; | |
49 | event.xexpose.serial = 0; | |
50 | event.xexpose.send_event = 0; | |
51 | event.xexpose.display = XtDisplay (widget); | |
52 | event.xexpose.window = XtWindow (widget); | |
53 | event.xexpose.x = 0; | |
54 | event.xexpose.y = 0; | |
55 | event.xexpose.width = widget->core.width; | |
56 | event.xexpose.height = widget->core.height; | |
57 | event.xexpose.count = 0; | |
58 | ||
59 | (*widget->core.widget_class->core_class.expose) | |
60 | (widget, &event, (Region)NULL); | |
61 | } | |
62 | ||
63 | ||
177c0ea7 | 64 | /* |
07bf635f RS |
65 | * Apply a function to all the subwidgets of a given widget recursively. |
66 | */ | |
67 | void | |
c3174d16 | 68 | XtApplyToWidgets (Widget w, XtApplyToWidgetsProc proc, 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; | |
3370edca | 77 | Widget *kids = (Widget *) xmalloc (sizeof (Widget) * nkids); |
07bf635f | 78 | int i; |
72af86bd AS |
79 | memcpy ((char *) kids, (char *) cw->composite.children, |
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 * | |
c3174d16 | 99 | XtApplyUntilToWidgets (Widget w, XtApplyUntilToWidgetsProc proc, XtPointer arg) |
07bf635f RS |
100 | { |
101 | void* result; | |
102 | if (XtIsComposite (w)) | |
103 | { | |
104 | CompositeWidget cw = (CompositeWidget)w; | |
105 | int i; | |
106 | for (i = 0; i < cw->composite.num_children; i++) | |
107 | if (XtIsWidget (cw->composite.children [i])){ | |
108 | result = proc (cw->composite.children [i], arg); | |
109 | if (result) | |
110 | return result; | |
111 | result = XtApplyUntilToWidgets (cw->composite.children [i], proc, | |
112 | arg); | |
113 | if (result) | |
114 | return result; | |
115 | } | |
116 | } | |
117 | return NULL; | |
118 | } | |
119 | ||
120 | ||
121 | /* | |
122 | * Returns a copy of the list of all children of a composite widget | |
123 | */ | |
124 | Widget * | |
c3174d16 | 125 | XtCompositeChildren (Widget widget, unsigned int *number) |
07bf635f RS |
126 | { |
127 | CompositeWidget cw = (CompositeWidget)widget; | |
128 | Widget* result; | |
129 | int n; | |
130 | int i; | |
131 | ||
132 | if (!XtIsComposite (widget)) | |
133 | { | |
134 | *number = 0; | |
135 | return NULL; | |
136 | } | |
137 | n = cw->composite.num_children; | |
138 | result = (Widget*)XtMalloc (n * sizeof (Widget)); | |
139 | *number = n; | |
140 | for (i = 0; i < n; i++) | |
141 | result [i] = cw->composite.children [i]; | |
142 | return result; | |
143 | } | |
144 | ||
145 | Boolean | |
c3174d16 | 146 | XtWidgetBeingDestroyedP (Widget widget) |
07bf635f RS |
147 | { |
148 | return widget->core.being_destroyed; | |
149 | } | |
150 | ||
151 | void | |
c3174d16 | 152 | XtSafelyDestroyWidget (Widget widget) |
07bf635f RS |
153 | { |
154 | #if 0 | |
155 | ||
156 | /* this requires IntrinsicI.h (actually, InitialI.h) */ | |
157 | ||
158 | XtAppContext app = XtWidgetToApplicationContext(widget); | |
159 | ||
160 | if (app->dispatch_level == 0) | |
161 | { | |
162 | app->dispatch_level = 1; | |
163 | XtDestroyWidget (widget); | |
164 | /* generates an event so that the event loop will be called */ | |
165 | XChangeProperty (XtDisplay (widget), XtWindow (widget), | |
166 | XA_STRING, XA_STRING, 32, PropModeAppend, NULL, 0); | |
167 | app->dispatch_level = 0; | |
168 | } | |
169 | else | |
170 | XtDestroyWidget (widget); | |
177c0ea7 | 171 | |
07bf635f RS |
172 | #else |
173 | abort (); | |
174 | #endif | |
175 | } | |
ab5796a9 | 176 |