lwlib/lwlib-Xlw.c

   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
   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)
  47      Widget widget;
  48 {
  49   int i;
  50   String names[100];
  51
  52   for (i = 0; i < 100 && widget != NULL; ++i)
  53     {
  54       names[i] = XtName (widget);
  55       widget = XtParent (widget);
  56     }
  57
  58   for (--i; i >= 1; --i)
  59     fprintf (stderr, "%s.", names[i]);
  60   fprintf (stderr, "%s\n", names[0]);
  61 }
  62
  63 #endif /* 0 */
  64
  65
  66 \f/* Menu callbacks */
  67
  68 /* Callback XtNhighlightCallback for Lucid menus.  W is the menu
  69    widget, CLIENT_DATA contains a pointer to the widget_instance
  70    for the menu, CALL_DATA contains a pointer to the widget_value
  71    structure for the highlighted menu item.  The latter may be null
  72    if there isn't any highlighted menu item.  */
  73
  74 static void
  75 highlight_hook (w, client_data, call_data)
  76      Widget w;
  77      XtPointer client_data;
  78      XtPointer call_data;
  79 {
  80   widget_instance *instance = (widget_instance *) client_data;
  81
  82   if (instance->info->highlight_cb
  83       && !w->core.being_destroyed)
  84     instance->info->highlight_cb (w, instance->info->id, call_data);
  85 }
  86
  87 static void
  88 enter_hook (w, client_data, call_data)
  89      Widget w;
  90      XtPointer client_data;
  91      XtPointer call_data;
  92 {
  93   highlight_hook (w, client_data, call_data);
  94 }
  95
  96 static void
  97 leave_hook (w, client_data, call_data)
  98      Widget w;
  99      XtPointer client_data;
 100      XtPointer call_data;
 101 {
 102   highlight_hook (w, client_data, NULL);
 103 }
 104
 105
 106 static void
 107 pre_hook (w, client_data, call_data)
 108      Widget w;
 109      XtPointer client_data;
 110      XtPointer call_data;
 111 {
 112   widget_instance* instance = (widget_instance*)client_data;
 113   widget_value* val;
 114
 115   if (w->core.being_destroyed)
 116     return;
 117
 118   val = lw_get_widget_value_for_widget (instance, w);
 119   if (instance->info->pre_activate_cb)
 120     instance->info->pre_activate_cb (w, instance->info->id,
 121                                      val ? val->call_data : NULL);
 122 }
 123
 124 static void
 125 pick_hook (w, client_data, call_data)
 126      Widget w;
 127      XtPointer client_data;
 128      XtPointer call_data;
 129 {
 130   widget_instance* instance = (widget_instance*)client_data;
 131   widget_value* contents_val = (widget_value*)call_data;
 132   widget_value* widget_val;
 133   XtPointer widget_arg;
 134
 135   if (w->core.being_destroyed)
 136     return;
 137
 138   if (instance->info->selection_cb && contents_val && contents_val->enabled
 139       && !contents_val->contents)
 140     instance->info->selection_cb (w, instance->info->id,
 141                                   contents_val->call_data);
 142
 143   widget_val = lw_get_widget_value_for_widget (instance, w);
 144   widget_arg = widget_val ? widget_val->call_data : NULL;
 145   if (instance->info->post_activate_cb)
 146     instance->info->post_activate_cb (w, instance->info->id, widget_arg);
 147
 148 }
 149
 150 \f/* creation functions */
 151
 152 static Widget
 153 xlw_create_menubar (instance)
 154      widget_instance* instance;
 155 {
 156   Widget widget;
 157   Arg al[5];
 158   int ac = 0;
 159
 160   XtSetArg (al[ac], XtNmenu, instance->info->val); ac++;
 161 #ifdef emacs
 162   XtSetArg (al[ac], XtNshowGrip, 0); ac++;
 163   XtSetArg (al[ac], XtNresizeToPreferred, 1); ac++;
 164   XtSetArg (al[ac], XtNallowResize, 1); ac++;
 165 #endif
 166
 167   /* This used to use XtVaCreateWidget, but an old Xt version
 168      has a bug in XtVaCreateWidget that frees instance->info->name.  */
 169   widget
 170     = XtCreateWidget (instance->info->name, xlwMenuWidgetClass,
 171                       instance->parent, al, ac);
 172
 173   XtAddCallback (widget, XtNopen, pre_hook, (XtPointer)instance);
 174   XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
 175   XtAddCallback (widget, XtNleaveCallback, leave_hook, (XtPointer)instance);
 176   XtAddCallback (widget, XtNenterCallback, enter_hook, (XtPointer)instance);
 177   return widget;
 178 }
 179
 180 static Widget
 181 xlw_create_popup_menu (instance)
 182      widget_instance* instance;
 183 {
 184   Widget popup_shell
 185     = XtCreatePopupShell (instance->info->name, overrideShellWidgetClass,
 186                           instance->parent, NULL, 0);
 187
 188   Widget widget;
 189   Arg al[2];
 190   int ac = 0;
 191
 192   XtSetArg (al[ac], XtNmenu, instance->info->val); ac++;
 193   XtSetArg (al[ac], XtNhorizontal, False); ac++;
 194
 195   /* This used to use XtVaManagedCreateWidget, but an old Xt version
 196      has a bug in XtVaManagedCreateWidget that frees instance->info->name.  */
 197   widget
 198     = XtCreateManagedWidget ("popup", xlwMenuWidgetClass,
 199                              popup_shell, al, ac);
 200
 201   XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
 202   XtAddCallback (widget, XtNleaveCallback, leave_hook, (XtPointer)instance);
 203   XtAddCallback (widget, XtNenterCallback, enter_hook, (XtPointer)instance);
 204
 205   return popup_shell;
 206 }
 207
 208 widget_creation_entry
 209 xlw_creation_table [] =
 210 {
 211   {"menubar", xlw_create_menubar},
 212   {"popup", xlw_create_popup_menu},
 213   {NULL, NULL}
 214 };
 215
 216 Boolean
 217 lw_lucid_widget_p (widget)
 218      Widget widget;
 219 {
 220   WidgetClass the_class = XtClass (widget);
 221
 222   if (the_class == xlwMenuWidgetClass)
 223     return True;
 224   if (the_class == overrideShellWidgetClass)
 225     return (XtClass (((CompositeWidget)widget)->composite.children [0])
 226             == xlwMenuWidgetClass);
 227   return False;
 228 }
 229
 230 void
 231 #ifdef PROTOTYPES
 232 xlw_update_one_widget (widget_instance* instance, Widget widget,
 233                        widget_value* val, Boolean deep_p)
 234 #else
 235 xlw_update_one_widget (instance, widget, val, deep_p)
 236      widget_instance* instance;
 237      Widget widget;
 238      widget_value* val;
 239      Boolean deep_p;
 240 #endif
 241 {
 242   Arg al[1];
 243
 244   /* This used to use XtVaSetValues, but some old Xt versions
 245      that have a bug in XtVaCreateWidget might have it here too.  */
 246   XtSetArg (al[0], XtNmenu, instance->info->val);
 247
 248   XtSetValues (widget, al, 1);
 249 }
 250
 251 void
 252 xlw_update_one_value (instance, widget, val)
 253      widget_instance* instance;
 254      Widget widget;
 255      widget_value* val;
 256 {
 257   return;
 258 }
 259
 260 void
 261 #ifdef PROTOTYPES
 262 xlw_pop_instance (widget_instance* instance, Boolean up)
 263 #else
 264 xlw_pop_instance (instance, up)
 265      widget_instance* instance;
 266      Boolean up;
 267 #endif
 268 {
 269 }
 270
 271 void
 272 xlw_popup_menu (widget, event)
 273      Widget widget;
 274      XEvent *event;
 275 {
 276   XlwMenuWidget mw;
 277
 278   if (!XtIsShell (widget))
 279     return;
 280
 281   mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
 282
 283   if (event)
 284     XtCallActionProc ((Widget) mw, "start", event, NULL, 0);
 285   else
 286     {
 287       XEvent dummy;
 288       XButtonPressedEvent *bd = &dummy.xbutton;
 289
 290       bd->type = ButtonPress;
 291       bd->serial = 0;
 292       bd->send_event = 0;
 293       bd->display = XtDisplay (widget);
 294       bd->window = XtWindow (XtParent (widget));
 295       bd->time = CurrentTime;
 296       bd->button = 0;
 297       XQueryPointer (bd->display, bd->window, &bd->root,
 298                      &bd->subwindow, &bd->x_root, &bd->y_root,
 299                      &bd->x, &bd->y, &bd->state);
 300
 301       XtCallActionProc ((Widget) mw, "start", &dummy, NULL, 0);
 302     }
 303 }
 304
 305 \f/* Destruction of instances */
 306 void
 307 xlw_destroy_instance (instance)
 308      widget_instance* instance;
 309 {
 310   if (instance->widget)
 311     XtDestroyWidget (instance->widget);
 312 }
 313
 314 /* arch-tag: 541e3912-477d-406e-9bf2-dbf2b7ff8c3b
 315    (do not change this comment) */