(eval-expression): Mention truncation in doc.
[bpt/emacs.git] / lwlib / lwlib-Xlw.c
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CommitLineData
1/* The lwlib interface to "xlwmenu" menus.
2 Copyright (C) 1992 Lucid, Inc.
3 Copyright (C) 1994, 2000, 2001, 2002, 2003, 2004,
4 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
5
6This file is part of the Lucid Widget Library.
7
8The Lucid Widget Library is free software; you can redistribute it and/or
9modify it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 1, or (at your option)
11any later version.
12
13The Lucid Widget Library is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with GNU Emacs; see the file COPYING. If not, write to
20the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21Boston, MA 02110-1301, USA. */
22
23#ifdef HAVE_CONFIG_H
24#include <config.h>
25#endif
26
27#include "lisp.h"
28
29#include "lwlib-Xlw.h"
30#include <X11/StringDefs.h>
31#include <X11/IntrinsicP.h>
32#include <X11/ObjectP.h>
33#include <X11/CompositeP.h>
34#include <X11/Shell.h>
35#include "xlwmenu.h"
36
37#if 0
38
39#include <stdio.h>
40
41/* Print the complete X resource name of widget WIDGET to stderr.
42 This is sometimes handy to have available. */
43
44void
45x_print_complete_resource_name (widget)
46 Widget widget;
47{
48 int i;
49 String names[100];
50
51 for (i = 0; i < 100 && widget != NULL; ++i)
52 {
53 names[i] = XtName (widget);
54 widget = XtParent (widget);
55 }
56
57 for (--i; i >= 1; --i)
58 fprintf (stderr, "%s.", names[i]);
59 fprintf (stderr, "%s\n", names[0]);
60}
61
62#endif /* 0 */
63
64
65\f/* Menu callbacks */
66
67/* Callback XtNhighlightCallback for Lucid menus. W is the menu
68 widget, CLIENT_DATA contains a pointer to the widget_instance
69 for the menu, CALL_DATA contains a pointer to the widget_value
70 structure for the highlighted menu item. The latter may be null
71 if there isn't any highlighted menu item. */
72
73static void
74highlight_hook (w, client_data, call_data)
75 Widget w;
76 XtPointer client_data;
77 XtPointer call_data;
78{
79 widget_instance *instance = (widget_instance *) client_data;
80
81 if (instance->info->highlight_cb
82 && !w->core.being_destroyed)
83 instance->info->highlight_cb (w, instance->info->id, call_data);
84}
85
86static void
87enter_hook (w, client_data, call_data)
88 Widget w;
89 XtPointer client_data;
90 XtPointer call_data;
91{
92 highlight_hook (w, client_data, call_data);
93}
94
95static void
96leave_hook (w, client_data, call_data)
97 Widget w;
98 XtPointer client_data;
99 XtPointer call_data;
100{
101 highlight_hook (w, client_data, NULL);
102}
103
104
105static void
106pre_hook (w, client_data, call_data)
107 Widget w;
108 XtPointer client_data;
109 XtPointer call_data;
110{
111 widget_instance* instance = (widget_instance*)client_data;
112 widget_value* val;
113
114 if (w->core.being_destroyed)
115 return;
116
117 val = lw_get_widget_value_for_widget (instance, w);
118 if (instance->info->pre_activate_cb)
119 instance->info->pre_activate_cb (w, instance->info->id,
120 val ? val->call_data : NULL);
121}
122
123static void
124pick_hook (w, client_data, call_data)
125 Widget w;
126 XtPointer client_data;
127 XtPointer call_data;
128{
129 widget_instance* instance = (widget_instance*)client_data;
130 widget_value* contents_val = (widget_value*)call_data;
131 widget_value* widget_val;
132 XtPointer widget_arg;
133
134 if (w->core.being_destroyed)
135 return;
136
137 if (instance->info->selection_cb && contents_val && contents_val->enabled
138 && !contents_val->contents)
139 instance->info->selection_cb (w, instance->info->id,
140 contents_val->call_data);
141
142 widget_val = lw_get_widget_value_for_widget (instance, w);
143 widget_arg = widget_val ? widget_val->call_data : NULL;
144 if (instance->info->post_activate_cb)
145 instance->info->post_activate_cb (w, instance->info->id, widget_arg);
146
147}
148
149\f/* creation functions */
150
151static Widget
152xlw_create_menubar (instance)
153 widget_instance* instance;
154{
155 Widget widget;
156 Arg al[5];
157 int ac = 0;
158
159 XtSetArg (al[ac], XtNmenu, instance->info->val); ac++;
160#ifdef emacs
161 XtSetArg (al[ac], XtNshowGrip, 0); ac++;
162 XtSetArg (al[ac], XtNresizeToPreferred, 1); ac++;
163 XtSetArg (al[ac], XtNallowResize, 1); ac++;
164#endif
165
166 /* This used to use XtVaCreateWidget, but an old Xt version
167 has a bug in XtVaCreateWidget that frees instance->info->name. */
168 widget
169 = XtCreateWidget (instance->info->name, xlwMenuWidgetClass,
170 instance->parent, al, ac);
171
172 XtAddCallback (widget, XtNopen, pre_hook, (XtPointer)instance);
173 XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
174 XtAddCallback (widget, XtNleaveCallback, leave_hook, (XtPointer)instance);
175 XtAddCallback (widget, XtNenterCallback, enter_hook, (XtPointer)instance);
176 return widget;
177}
178
179static Widget
180xlw_create_popup_menu (instance)
181 widget_instance* instance;
182{
183 Widget popup_shell
184 = XtCreatePopupShell (instance->info->name, overrideShellWidgetClass,
185 instance->parent, NULL, 0);
186
187 Widget widget;
188 Arg al[2];
189 int ac = 0;
190
191 XtSetArg (al[ac], XtNmenu, instance->info->val); ac++;
192 XtSetArg (al[ac], XtNhorizontal, False); ac++;
193
194 /* This used to use XtVaManagedCreateWidget, but an old Xt version
195 has a bug in XtVaManagedCreateWidget that frees instance->info->name. */
196 widget
197 = XtCreateManagedWidget ("popup", xlwMenuWidgetClass,
198 popup_shell, al, ac);
199
200 XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
201 XtAddCallback (widget, XtNleaveCallback, leave_hook, (XtPointer)instance);
202 XtAddCallback (widget, XtNenterCallback, enter_hook, (XtPointer)instance);
203
204 return popup_shell;
205}
206
207widget_creation_entry
208xlw_creation_table [] =
209{
210 {"menubar", xlw_create_menubar},
211 {"popup", xlw_create_popup_menu},
212 {NULL, NULL}
213};
214
215Boolean
216lw_lucid_widget_p (widget)
217 Widget widget;
218{
219 WidgetClass the_class = XtClass (widget);
220
221 if (the_class == xlwMenuWidgetClass)
222 return True;
223 if (the_class == overrideShellWidgetClass)
224 return (XtClass (((CompositeWidget)widget)->composite.children [0])
225 == xlwMenuWidgetClass);
226 return False;
227}
228
229void
230#ifdef PROTOTYPES
231xlw_update_one_widget (widget_instance* instance, Widget widget,
232 widget_value* val, Boolean deep_p)
233#else
234xlw_update_one_widget (instance, widget, val, deep_p)
235 widget_instance* instance;
236 Widget widget;
237 widget_value* val;
238 Boolean deep_p;
239#endif
240{
241 Arg al[1];
242
243 /* This used to use XtVaSetValues, but some old Xt versions
244 that have a bug in XtVaCreateWidget might have it here too. */
245 XtSetArg (al[0], XtNmenu, instance->info->val);
246
247 XtSetValues (widget, al, 1);
248}
249
250void
251xlw_update_one_value (instance, widget, val)
252 widget_instance* instance;
253 Widget widget;
254 widget_value* val;
255{
256 return;
257}
258
259void
260#ifdef PROTOTYPES
261xlw_pop_instance (widget_instance* instance, Boolean up)
262#else
263xlw_pop_instance (instance, up)
264 widget_instance* instance;
265 Boolean up;
266#endif
267{
268}
269
270void
271xlw_popup_menu (widget, event)
272 Widget widget;
273 XEvent *event;
274{
275 XlwMenuWidget mw;
276
277 if (!XtIsShell (widget))
278 return;
279
280 mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
281
282 if (event)
283 XtCallActionProc ((Widget) mw, "start", event, NULL, 0);
284 else
285 {
286 XEvent dummy;
287 XButtonPressedEvent *bd = &dummy.xbutton;
288
289 bd->type = ButtonPress;
290 bd->serial = 0;
291 bd->send_event = 0;
292 bd->display = XtDisplay (widget);
293 bd->window = XtWindow (XtParent (widget));
294 bd->time = CurrentTime;
295 bd->button = 0;
296 XQueryPointer (bd->display, bd->window, &bd->root,
297 &bd->subwindow, &bd->x_root, &bd->y_root,
298 &bd->x, &bd->y, &bd->state);
299
300 XtCallActionProc ((Widget) mw, "start", &dummy, NULL, 0);
301 }
302}
303
304\f/* Destruction of instances */
305void
306xlw_destroy_instance (instance)
307 widget_instance* instance;
308{
309 if (instance->widget)
310 XtDestroyWidget (instance->widget);
311}
312
313/* arch-tag: 541e3912-477d-406e-9bf2-dbf2b7ff8c3b
314 (do not change this comment) */