lwlib/lwlib-Xlw.c

   1 /* The lwlib interface to "xlwmenu" menus.
   2
   3 Copyright (C) 1992 Lucid, Inc.
   4 Copyright (C) 1994, 2000-2011 Free Software Foundation, Inc.
   5
   6 This file is part of the Lucid Widget Library.
   7
   8 The Lucid Widget Library is free software; you can redistribute it and/or
   9 modify it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 1, or (at your option)
  11 any later version.
  12
  13 The Lucid Widget Library is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU Emacs; see the file COPYING.  If not, write to
  20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21 Boston, MA 02110-1301, USA.  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <setjmp.h>
  28 #include <lisp.h>
  29
  30 #include "lwlib-Xlw.h"
  31 #include <X11/StringDefs.h>
  32 #include <X11/IntrinsicP.h>
  33 #include <X11/ObjectP.h>
  34 #include <X11/CompositeP.h>
  35 #include <X11/Shell.h>
  36 #include "xlwmenu.h"
  37
  38 #if 0
  39
  40 #include <stdio.h>
  41
  42 /* Print the complete X resource name of widget WIDGET to stderr.
  43    This is sometimes handy to have available.  */
  44
  45 void
  46 x_print_complete_resource_name (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
  73 static void
  74 highlight_hook (Widget w, XtPointer client_data, XtPointer call_data)
  75 {
  76   widget_instance *instance = (widget_instance *) client_data;
  77
  78   if (instance->info->highlight_cb
  79       && !w->core.being_destroyed)
  80     instance->info->highlight_cb (w, instance->info->id, call_data);
  81 }
  82
  83 static void
  84 enter_hook (Widget w, XtPointer client_data, XtPointer call_data)
  85 {
  86   highlight_hook (w, client_data, call_data);
  87 }
  88
  89 static void
  90 leave_hook (Widget w, XtPointer client_data, XtPointer call_data)
  91 {
  92   highlight_hook (w, client_data, NULL);
  93 }
  94
  95
  96 static void
  97 pre_hook (Widget w, XtPointer client_data, XtPointer call_data)
  98 {
  99   widget_instance* instance = (widget_instance*)client_data;
 100   widget_value* val;
 101
 102   if (w->core.being_destroyed)
 103     return;
 104
 105   val = lw_get_widget_value_for_widget (instance, w);
 106   if (instance->info->pre_activate_cb)
 107     instance->info->pre_activate_cb (w, instance->info->id,
 108                                      val ? val->call_data : NULL);
 109 }
 110
 111 static void
 112 pick_hook (Widget w, XtPointer client_data, XtPointer call_data)
 113 {
 114   widget_instance* instance = (widget_instance*)client_data;
 115   widget_value* contents_val = (widget_value*)call_data;
 116   widget_value* widget_val;
 117   XtPointer widget_arg;
 118
 119   if (w->core.being_destroyed)
 120     return;
 121
 122   if (instance->info->selection_cb && contents_val && contents_val->enabled
 123       && !contents_val->contents)
 124     instance->info->selection_cb (w, instance->info->id,
 125                                   contents_val->call_data);
 126
 127   widget_val = lw_get_widget_value_for_widget (instance, w);
 128   widget_arg = widget_val ? widget_val->call_data : NULL;
 129   if (instance->info->post_activate_cb)
 130     instance->info->post_activate_cb (w, instance->info->id, widget_arg);
 131
 132 }
 133
 134 \f/* creation functions */
 135
 136 static Widget
 137 xlw_create_menubar (widget_instance *instance)
 138 {
 139   Widget widget;
 140   Arg al[5];
 141   int ac = 0;
 142
 143   XtSetArg (al[ac], XtNmenu, instance->info->val); ac++;
 144 #ifdef emacs
 145   XtSetArg (al[ac], XtNshowGrip, 0); ac++;
 146   XtSetArg (al[ac], XtNresizeToPreferred, 1); ac++;
 147   XtSetArg (al[ac], XtNallowResize, 1); ac++;
 148 #endif
 149
 150   /* This used to use XtVaCreateWidget, but an old Xt version
 151      has a bug in XtVaCreateWidget that frees instance->info->name.  */
 152   widget
 153     = XtCreateWidget (instance->info->name, xlwMenuWidgetClass,
 154                       instance->parent, al, ac);
 155
 156   XtAddCallback (widget, XtNopen, pre_hook, (XtPointer)instance);
 157   XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
 158   XtAddCallback (widget, XtNleaveCallback, leave_hook, (XtPointer)instance);
 159   XtAddCallback (widget, XtNenterCallback, enter_hook, (XtPointer)instance);
 160   return widget;
 161 }
 162
 163 static Widget
 164 xlw_create_popup_menu (widget_instance *instance)
 165 {
 166   Widget popup_shell
 167     = XtCreatePopupShell (instance->info->name, overrideShellWidgetClass,
 168                           instance->parent, NULL, 0);
 169
 170   Widget widget;
 171   Arg al[2];
 172   int ac = 0;
 173
 174   XtSetArg (al[ac], XtNmenu, instance->info->val); ac++;
 175   XtSetArg (al[ac], XtNhorizontal, False); ac++;
 176
 177   /* This used to use XtVaManagedCreateWidget, but an old Xt version
 178      has a bug in XtVaManagedCreateWidget that frees instance->info->name.  */
 179   widget
 180     = XtCreateManagedWidget ("popup", xlwMenuWidgetClass,
 181                              popup_shell, al, ac);
 182
 183   XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
 184   XtAddCallback (widget, XtNleaveCallback, leave_hook, (XtPointer)instance);
 185   XtAddCallback (widget, XtNenterCallback, enter_hook, (XtPointer)instance);
 186
 187   return popup_shell;
 188 }
 189
 190 widget_creation_entry
 191 xlw_creation_table [] =
 192 {
 193   {"menubar", xlw_create_menubar},
 194   {"popup", xlw_create_popup_menu},
 195   {NULL, NULL}
 196 };
 197
 198 Boolean
 199 lw_lucid_widget_p (Widget widget)
 200 {
 201   WidgetClass the_class = XtClass (widget);
 202
 203   if (the_class == xlwMenuWidgetClass)
 204     return True;
 205   if (the_class == overrideShellWidgetClass)
 206     return (XtClass (((CompositeWidget)widget)->composite.children [0])
 207             == xlwMenuWidgetClass);
 208   return False;
 209 }
 210
 211 void
 212 xlw_update_one_widget (widget_instance* instance, Widget widget,
 213                        widget_value* val, Boolean deep_p)
 214 {
 215   Arg al[1];
 216
 217   /* This used to use XtVaSetValues, but some old Xt versions
 218      that have a bug in XtVaCreateWidget might have it here too.  */
 219   XtSetArg (al[0], XtNmenu, instance->info->val);
 220
 221   XtSetValues (widget, al, 1);
 222 }
 223
 224 void
 225 xlw_update_one_value (widget_instance *instance,
 226                       Widget widget,
 227                       widget_value *val)
 228 {
 229   return;
 230 }
 231
 232 void
 233 xlw_pop_instance (widget_instance* instance, Boolean up)
 234 {
 235 }
 236
 237 void
 238 xlw_popup_menu (Widget widget, XEvent *event)
 239 {
 240   XlwMenuWidget mw;
 241
 242   if (!XtIsShell (widget))
 243     return;
 244
 245   mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
 246
 247   if (event)
 248     XtCallActionProc ((Widget) mw, "start", event, NULL, 0);
 249   else
 250     {
 251       XEvent dummy;
 252       XButtonPressedEvent *bd = &dummy.xbutton;
 253
 254       bd->type = ButtonPress;
 255       bd->serial = 0;
 256       bd->send_event = 0;
 257       bd->display = XtDisplay (widget);
 258       bd->window = XtWindow (XtParent (widget));
 259       bd->time = CurrentTime;
 260       bd->button = 0;
 261       XQueryPointer (bd->display, bd->window, &bd->root,
 262                      &bd->subwindow, &bd->x_root, &bd->y_root,
 263                      &bd->x, &bd->y, &bd->state);
 264
 265       XtCallActionProc ((Widget) mw, "start", &dummy, NULL, 0);
 266     }
 267 }
 268
 269 \f/* Destruction of instances */
 270 void
 271 xlw_destroy_instance (widget_instance *instance)
 272 {
 273   if (instance->widget)
 274     XtDestroyWidget (instance->widget);
 275 }