lwlib/lwlib-Xaw.c

   1 /* The lwlib interface to Athena widgets.
   2
   3 Copyright (C) 1993 Chuck Thompson <cthomp@cs.uiuc.edu>
   4 Copyright (C) 1994, 2001-2012 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 <stdio.h>
  28 #include <setjmp.h>
  29 #include <ctype.h>
  30
  31 #include <lisp.h>
  32
  33 #include "lwlib-Xaw.h"
  34
  35 #include <X11/StringDefs.h>
  36 #include <X11/IntrinsicP.h>
  37 #include <X11/CoreP.h>
  38 #include <X11/Shell.h>
  39
  40 #ifdef HAVE_XAW3D
  41 #include <X11/Xaw3d/Scrollbar.h>
  42 #include <X11/Xaw3d/Paned.h>
  43 #include <X11/Xaw3d/Dialog.h>
  44 #include <X11/Xaw3d/Form.h>
  45 #include <X11/Xaw3d/Command.h>
  46 #include <X11/Xaw3d/Label.h>
  47 #else /* !HAVE_XAW3D */
  48 #include <X11/Xaw/Scrollbar.h>
  49 #include <X11/Xaw/Paned.h>
  50 #include <X11/Xaw/Dialog.h>
  51 #include <X11/Xaw/Form.h>
  52 #include <X11/Xaw/Command.h>
  53 #include <X11/Xaw/Label.h>
  54 #endif /* HAVE_XAW3D */
  55
  56 #include <X11/Xatom.h>
  57
  58 #ifdef HAVE_XFT
  59 #include <X11/Xft/Xft.h>
  60
  61 struct widget_xft_data
  62 {
  63   Widget widget;
  64   XftFont *xft_font;
  65   XftDraw *xft_draw;
  66   XftColor xft_fg, xft_bg;
  67   int p_width, p_height;
  68   Pixmap p;
  69 };
  70
  71
  72 #endif
  73
  74 static void xaw_generic_callback (Widget widget,
  75                                   XtPointer closure,
  76                                   XtPointer call_data);
  77
  78
  79 Boolean
  80 lw_xaw_widget_p (Widget widget)
  81 {
  82   return (XtIsSubclass (widget, scrollbarWidgetClass) ||
  83           XtIsSubclass (widget, dialogWidgetClass));
  84 }
  85
  86
  87 #ifdef HAVE_XFT
  88 static void
  89 fill_xft_data (struct widget_xft_data *data, Widget widget, XftFont *font)
  90 {
  91   Pixel bg, fg;
  92   XColor colors[2];
  93
  94   data->widget = widget;
  95   data->xft_font = font;
  96   XtVaGetValues (widget,
  97                  XtNbackground, &bg,
  98                  XtNforeground, &fg,
  99                  NULL);
 100
 101   colors[0].pixel = data->xft_fg.pixel = fg;
 102   colors[1].pixel = data->xft_bg.pixel = bg;
 103   XQueryColors (XtDisplay (widget),
 104                 DefaultColormapOfScreen (XtScreen (widget)),
 105                 colors, 2);
 106
 107   data->xft_fg.color.alpha = 0xFFFF;
 108   data->xft_fg.color.red = colors[0].red;
 109   data->xft_fg.color.green = colors[0].green;
 110   data->xft_fg.color.blue = colors[0].blue;
 111   data->xft_bg.color.alpha = 0xFFFF;
 112   data->xft_bg.color.red = colors[1].red;
 113   data->xft_bg.color.green = colors[1].green;
 114   data->xft_bg.color.blue = colors[1].blue;
 115
 116   data->p = None;
 117   data->xft_draw = 0;
 118   data->p_width = data->p_height = 0;
 119 }
 120
 121 static XftFont*
 122 openFont (Widget widget, char *name)
 123 {
 124   char *fname = name;
 125   int screen = XScreenNumberOfScreen (XtScreen (widget));
 126   int len = strlen (fname), i = len-1;
 127   XftFont *fn;
 128
 129   /* Try to convert Gtk-syntax (Sans 9) to Xft syntax Sans-9.  */
 130   while (i > 0 && isdigit (fname[i]))
 131     --i;
 132   if (fname[i] == ' ')
 133     {
 134       fname = xstrdup (name);
 135       fname[i] = '-';
 136     }
 137
 138   fn = XftFontOpenName (XtDisplay (widget), screen, fname);
 139   if (fname != name) xfree (fname);
 140
 141   return fn;
 142 }
 143
 144 static int
 145 get_text_width_and_height (Widget widget, char *text,
 146                            XftFont *xft_font,
 147                            int *height)
 148 {
 149   int w = 0, h = 0;
 150   char *bp = text;
 151
 152   while (bp && *bp != '\0')
 153     {
 154       XGlyphInfo gi;
 155       char *cp = strchr (bp, '\n');
 156       XftTextExtentsUtf8 (XtDisplay (widget), xft_font,
 157                           (FcChar8 *) bp,
 158                           cp ? cp - bp : strlen (bp),
 159                           &gi);
 160       bp = cp ? cp + 1 : NULL;
 161       h += xft_font->height;
 162       if (w < gi.width) w = gi.width;
 163     }
 164
 165   *height = h;
 166   return w;
 167 }
 168
 169 static void
 170 draw_text (struct widget_xft_data *data, char *lbl, int inverse)
 171 {
 172   Screen *sc = XtScreen (data->widget);
 173   int screen = XScreenNumberOfScreen (sc);
 174   int y = data->xft_font->ascent;
 175   int x = inverse ? 0 : 2;
 176   char *bp = lbl;
 177
 178   data->xft_draw = XftDrawCreate (XtDisplay (data->widget),
 179                                   data->p,
 180                                   DefaultVisual (XtDisplay (data->widget),
 181                                                  screen),
 182                                   DefaultColormapOfScreen (sc));
 183   XftDrawRect (data->xft_draw,
 184                inverse ? &data->xft_fg : &data->xft_bg,
 185                0, 0, data->p_width, data->p_height);
 186
 187   if (!inverse) y += 2;
 188   while (bp && *bp != '\0')
 189     {
 190       char *cp = strchr (bp, '\n');
 191       XftDrawStringUtf8 (data->xft_draw,
 192                          inverse ? &data->xft_bg : &data->xft_fg,
 193                          data->xft_font, x, y,
 194                          (FcChar8 *) bp,
 195                          cp ? cp - bp : strlen (bp));
 196       bp = cp ? cp + 1 : NULL;
 197       /* 1.2 gives reasonable line spacing.  */
 198       y += data->xft_font->height * 1.2;
 199     }
 200
 201 }
 202
 203
 204 static void
 205 set_text (struct widget_xft_data *data, Widget toplevel, char *lbl, int margin)
 206 {
 207   int width, height;
 208
 209   width = get_text_width_and_height (data->widget, lbl, data->xft_font,
 210                                      &height);
 211   data->p_width = width + margin;
 212   data->p_height = height + margin;
 213
 214   data->p = XCreatePixmap (XtDisplay (data->widget),
 215                            XtWindow (toplevel),
 216                            data->p_width,
 217                            data->p_height,
 218                            DefaultDepthOfScreen (XtScreen (data->widget)));
 219   draw_text (data, lbl, 0);
 220   XtVaSetValues (data->widget, XtNbitmap, data->p, NULL);
 221 }
 222
 223 static struct widget_xft_data *
 224 find_xft_data (Widget widget)
 225 {
 226   widget_instance *inst = NULL;
 227   Widget parent = XtParent (widget);
 228   struct widget_xft_data *data = NULL;
 229   int nr;
 230   while (parent && !inst)
 231     {
 232       inst = lw_get_widget_instance (parent);
 233       parent = XtParent (parent);
 234     }
 235   if (!inst || !inst->xft_data || !inst->xft_data[0].xft_font) return 0;
 236
 237   for (nr = 0; data == NULL && nr < inst->nr_xft_data; ++nr)
 238     {
 239       if (inst->xft_data[nr].widget == widget)
 240         data = &inst->xft_data[nr];
 241     }
 242
 243   return data;
 244 }
 245
 246 static void
 247 command_press (Widget widget,
 248                XEvent* event,
 249                String *params,
 250                Cardinal *num_params)
 251 {
 252   struct widget_xft_data *data = find_xft_data (widget);
 253   if (data)
 254     {
 255       char *lbl;
 256       /* Since this isn't used for rectangle buttons, use it to for armed.  */
 257       XtVaSetValues (widget, XtNcornerRoundPercent, 1, NULL);
 258
 259       XtVaGetValues (widget, XtNlabel, &lbl, NULL);
 260       draw_text (data, lbl, 1);
 261     }
 262 }
 263
 264 static void
 265 command_reset (Widget widget,
 266                XEvent* event,
 267                String *params,
 268                Cardinal *num_params)
 269 {
 270   struct widget_xft_data *data = find_xft_data (widget);
 271   if (data)
 272     {
 273       Dimension cr;
 274       XtVaGetValues (widget, XtNcornerRoundPercent, &cr, NULL);
 275       if (cr == 1)
 276         {
 277           char *lbl;
 278           XtVaSetValues (widget, XtNcornerRoundPercent, 0, NULL);
 279           XtVaGetValues (widget, XtNlabel, &lbl, NULL);
 280           draw_text (data, lbl, 0);
 281         }
 282     }
 283 }
 284
 285
 286 #endif
 287
 288 void
 289 xaw_update_one_widget (widget_instance *instance,
 290                        Widget widget,
 291                        widget_value *val,
 292                        Boolean deep_p)
 293 {
 294   if (XtIsSubclass (widget, dialogWidgetClass))
 295     {
 296
 297 #ifdef HAVE_XFT
 298       if (instance->xft_data && instance->xft_data[0].xft_font)
 299         {
 300           set_text (&instance->xft_data[0], instance->parent,
 301                     val->contents->value, 10);
 302         }
 303 #endif
 304       XtVaSetValues (widget, XtNlabel, val->contents->value, NULL);
 305     }
 306   else if (XtIsSubclass (widget, commandWidgetClass))
 307     {
 308       Dimension bw = 0;
 309       Arg al[10];
 310       int ac = 0;
 311
 312       XtVaGetValues (widget, XtNborderWidth, &bw, NULL);
 313       if (bw == 0)
 314         /* Don't let buttons end up with 0 borderwidth, that's ugly...
 315            Yeah, all this should really be done through app-defaults files
 316            or fallback resources, but that's a whole different can of worms
 317            that I don't feel like opening right now.  Making Athena widgets
 318            not look like shit is just entirely too much work.
 319          */
 320         {
 321           XtSetArg (al[0], XtNborderWidth, 1);
 322           XtSetValues (widget, al, 1);
 323         }
 324
 325       XtSetSensitive (widget, val->enabled);
 326       XtSetArg (al[ac], XtNlabel, val->value);ac++;
 327       /* Force centered button text.  Se above. */
 328       XtSetArg (al[ac], XtNjustify, XtJustifyCenter);ac++;
 329 #ifdef HAVE_XFT
 330       if (instance->xft_data && instance->xft_data[0].xft_font)
 331         {
 332           int th;
 333           int nr;
 334           for (nr = 0; nr < instance->nr_xft_data; ++nr)
 335             if (instance->xft_data[nr].widget == widget)
 336               break;
 337           if (nr < instance->nr_xft_data)
 338             {
 339               set_text (&instance->xft_data[nr], instance->parent,
 340                         val->value, 6);
 341
 342               /* Must set internalHeight to twice the highlight thickness,
 343                  or else it gets overwritten by our pixmap.  Probably a bug.  */
 344               XtVaGetValues (widget, XtNhighlightThickness, &th, NULL);
 345               XtSetArg (al[ac], XtNinternalHeight, 2*th);ac++;
 346             }
 347         }
 348 #endif
 349       XtSetValues (widget, al, ac);
 350       XtRemoveAllCallbacks (widget, XtNcallback);
 351       XtAddCallback (widget, XtNcallback, xaw_generic_callback, instance);
 352     }
 353 }
 354
 355 void
 356 xaw_update_one_value (widget_instance *instance,
 357                       Widget widget,
 358                       widget_value *val)
 359 {
 360   /* This function is not used by the scrollbars and those are the only
 361      Athena widget implemented at the moment so do nothing. */
 362   return;
 363 }
 364
 365 void
 366 xaw_destroy_instance (widget_instance *instance)
 367 {
 368 #ifdef HAVE_XFT
 369   if (instance->xft_data)
 370     {
 371       int i;
 372       for (i = 0; i < instance->nr_xft_data; ++i)
 373         {
 374           if (instance->xft_data[i].xft_draw)
 375             XftDrawDestroy (instance->xft_data[i].xft_draw);
 376           if (instance->xft_data[i].p != None)
 377             {
 378               XtVaSetValues (instance->xft_data[i].widget, XtNbitmap, None,
 379                              NULL);
 380               XFreePixmap (XtDisplay (instance->widget),
 381                            instance->xft_data[i].p);
 382             }
 383         }
 384       if (instance->xft_data[0].xft_font)
 385         XftFontClose (XtDisplay (instance->widget),
 386                       instance->xft_data[0].xft_font);
 387       xfree (instance->xft_data);
 388     }
 389 #endif
 390   if (XtIsSubclass (instance->widget, dialogWidgetClass))
 391     /* Need to destroy the Shell too. */
 392     XtDestroyWidget (XtParent (instance->widget));
 393   else
 394     XtDestroyWidget (instance->widget);
 395 }
 396
 397 void
 398 xaw_popup_menu (Widget widget, XEvent *event)
 399 {
 400   /* An Athena menubar has not been implemented. */
 401   return;
 402 }
 403
 404 void
 405 xaw_pop_instance (widget_instance *instance, Boolean up)
 406 {
 407   Widget widget = instance->widget;
 408
 409   if (up)
 410     {
 411       if (XtIsSubclass (widget, dialogWidgetClass))
 412         {
 413           /* For dialogs, we need to call XtPopup on the parent instead
 414              of calling XtManageChild on the widget.
 415              Also we need to hack the shell's WM_PROTOCOLS to get it to
 416              understand what the close box is supposed to do!!
 417            */
 418           Display *dpy = XtDisplay (widget);
 419           Widget shell = XtParent (widget);
 420           Atom props [2];
 421           int i = 0;
 422           props [i++] = XInternAtom (dpy, "WM_DELETE_WINDOW", False);
 423           XChangeProperty (dpy, XtWindow (shell),
 424                            XInternAtom (dpy, "WM_PROTOCOLS", False),
 425                            XA_ATOM, 32, PropModeAppend,
 426                            (unsigned char *) props, i);
 427
 428           /* Center the widget in its parent.  Why isn't this kind of crap
 429              done automatically?  I thought toolkits were supposed to make
 430              life easier?
 431            */
 432           {
 433             unsigned int x, y, w, h;
 434             Widget topmost = instance->parent;
 435             Arg args[2];
 436
 437             w = shell->core.width;
 438             h = shell->core.height;
 439             while (topmost->core.parent && XtIsRealized (topmost->core.parent))
 440               topmost = topmost->core.parent;
 441             if (topmost->core.width < w) x = topmost->core.x;
 442             else x = topmost->core.x + ((topmost->core.width - w) / 2);
 443             if (topmost->core.height < h) y = topmost->core.y;
 444             else y = topmost->core.y + ((topmost->core.height - h) / 2);
 445             /* Using XtMoveWidget caused the widget to come
 446                out in the wrong place with vtwm.
 447                Question of virtual vs real coords, perhaps.  */
 448             XtSetArg (args[0], XtNx, x);
 449             XtSetArg (args[1], XtNy, y);
 450             XtSetValues (shell, args, 2);
 451           }
 452
 453           /* Finally, pop it up. */
 454           XtPopup (shell, XtGrabNonexclusive);
 455         }
 456       else
 457         XtManageChild (widget);
 458     }
 459   else
 460     {
 461       if (XtIsSubclass (widget, dialogWidgetClass))
 462         XtUnmanageChild (XtParent (widget));
 463       else
 464         XtUnmanageChild (widget);
 465     }
 466 }
 467
 468 \f
 469 /* Dialog boxes */
 470
 471 static char overrideTrans[] =
 472         "<Message>WM_PROTOCOLS: lwlib_delete_dialog()";
 473 /* Dialogs pop down on any key press */
 474 static char dialogOverride[] =
 475        "<KeyPress>Escape:       lwlib_delete_dialog()";
 476 static void wm_delete_window (Widget w,
 477                               XEvent *event,
 478                               String *params,
 479                               Cardinal *num_params);
 480 static XtActionsRec xaw_actions [] = {
 481   {"lwlib_delete_dialog", wm_delete_window}
 482 };
 483 static Boolean actions_initted = False;
 484
 485 #ifdef HAVE_XFT
 486 static XtActionsRec button_actions[] =
 487   {
 488     { "my_reset", command_reset },
 489     { "my_press", command_press },
 490   };
 491 char buttonTrans[] =
 492   "<Leave>: reset() my_reset()\n"
 493   "<Btn1Down>: set() my_press()\n"
 494   "<Btn1Up>:  my_reset() notify() unset()\n";
 495 #endif
 496
 497 static Widget
 498 make_dialog (char* name,
 499              Widget parent,
 500              Boolean pop_up_p,
 501              char* shell_title,
 502              char* icon_name,
 503              Boolean text_input_slot,
 504              Boolean radio_box,
 505              Boolean list,
 506              int left_buttons,
 507              int right_buttons,
 508              widget_instance *instance)
 509 {
 510   Arg av [20];
 511   int ac = 0;
 512   int i, bc;
 513   char button_name [255];
 514   Widget shell;
 515   Widget dialog;
 516   Widget button;
 517   XtTranslations override;
 518 #ifdef HAVE_XFT
 519   XftFont *xft_font = 0;
 520   XtTranslations button_override;
 521 #endif
 522
 523   if (! pop_up_p) abort (); /* not implemented */
 524   if (text_input_slot) abort (); /* not implemented */
 525   if (radio_box) abort (); /* not implemented */
 526   if (list) abort (); /* not implemented */
 527
 528   if (! actions_initted)
 529     {
 530       XtAppContext app = XtWidgetToApplicationContext (parent);
 531       XtAppAddActions (app, xaw_actions,
 532                        sizeof (xaw_actions) / sizeof (xaw_actions[0]));
 533 #ifdef HAVE_XFT
 534       XtAppAddActions (app, button_actions,
 535                        sizeof (button_actions) / sizeof (button_actions[0]));
 536 #endif
 537       actions_initted = True;
 538     }
 539
 540   override = XtParseTranslationTable (overrideTrans);
 541
 542   ac = 0;
 543   XtSetArg (av[ac], XtNtitle, shell_title); ac++;
 544   XtSetArg (av[ac], XtNallowShellResize, True); ac++;
 545
 546   /* Don't allow any geometry request from the user.  */
 547   XtSetArg (av[ac], XtNgeometry, 0); ac++;
 548
 549   shell = XtCreatePopupShell ("dialog", transientShellWidgetClass,
 550                               parent, av, ac);
 551   XtOverrideTranslations (shell, override);
 552
 553   ac = 0;
 554   dialog = XtCreateManagedWidget (name, dialogWidgetClass, shell, av, ac);
 555   override = XtParseTranslationTable (dialogOverride);
 556   XtOverrideTranslations (dialog, override);
 557
 558 #ifdef HAVE_XFT
 559   {
 560     int num;
 561     Widget *ch = NULL;
 562     Widget w = 0;
 563     XtVaGetValues (dialog,
 564                    XtNnumChildren, &num,
 565                    XtNchildren, &ch, NULL);
 566     for (i = 0; i < num; ++i)
 567       {
 568         if (!XtIsSubclass (ch[i], commandWidgetClass)
 569             && XtIsSubclass (ch[i], labelWidgetClass))
 570           {
 571             w = ch[i];
 572             break;
 573           }
 574       }
 575     instance->xft_data = 0;
 576     instance->nr_xft_data = 0;
 577     if (w)
 578       {
 579         XtResource rec[] =
 580           { { "font", "Font", XtRString, sizeof(String), 0, XtRString,
 581               (XtPointer)"Sans-10" }};
 582         char *fontName = NULL;
 583         XtVaGetSubresources (dialog, &fontName, "Dialog", "dialog",
 584                              rec, 1, (String)NULL);
 585         if (fontName)
 586           {
 587             XFontStruct *xfn = XLoadQueryFont (XtDisplay (dialog), fontName);
 588             if (!xfn)
 589               xft_font = openFont (dialog, fontName);
 590             else
 591               XFreeFont (XtDisplay (dialog), xfn);
 592           }
 593
 594         if (xft_font)
 595           {
 596             instance->nr_xft_data = left_buttons + right_buttons + 1;
 597             instance->xft_data = calloc (instance->nr_xft_data,
 598                                          sizeof(*instance->xft_data));
 599
 600             fill_xft_data (&instance->xft_data[0], w, xft_font);
 601           }
 602       }
 603
 604     button_override = XtParseTranslationTable (buttonTrans);
 605   }
 606 #endif
 607
 608   bc = 0;
 609   button = 0;
 610   for (i = 0; i < left_buttons; i++)
 611     {
 612       ac = 0;
 613       XtSetArg (av [ac], XtNfromHoriz, button); ac++;
 614       XtSetArg (av [ac], XtNleft, XtChainLeft); ac++;
 615       XtSetArg (av [ac], XtNright, XtChainLeft); ac++;
 616       XtSetArg (av [ac], XtNtop, XtChainBottom); ac++;
 617       XtSetArg (av [ac], XtNbottom, XtChainBottom); ac++;
 618       XtSetArg (av [ac], XtNresizable, True); ac++;
 619 #ifdef HAVE_XAW3D
 620       if (DefaultDepthOfScreen (XtScreen (dialog)) >= 16)
 621         {
 622           /* Turn of dithered shadow if we can.  Looks bad */
 623           XtSetArg (av [ac], "beNiceToColormap", False); ac++;
 624         }
 625 #endif
 626       sprintf (button_name, "button%d", ++bc);
 627       button = XtCreateManagedWidget (button_name, commandWidgetClass,
 628                                       dialog, av, ac);
 629 #ifdef HAVE_XFT
 630       if (xft_font)
 631         {
 632           fill_xft_data (&instance->xft_data[bc], button, xft_font);
 633           XtOverrideTranslations (button, button_override);
 634         }
 635 #endif
 636     }
 637
 638   for (i = 0; i < right_buttons; i++)
 639     {
 640       ac = 0;
 641       XtSetArg (av [ac], XtNfromHoriz, button); ac++;
 642       if (i == 0)
 643         {
 644           /* Separator to the other buttons. */
 645           XtSetArg (av [ac], XtNhorizDistance, 30); ac++;
 646         }
 647       XtSetArg (av [ac], XtNleft, XtChainRight); ac++;
 648       XtSetArg (av [ac], XtNright, XtChainRight); ac++;
 649       XtSetArg (av [ac], XtNtop, XtChainBottom); ac++;
 650       XtSetArg (av [ac], XtNbottom, XtChainBottom); ac++;
 651       XtSetArg (av [ac], XtNresizable, True); ac++;
 652 #ifdef HAVE_XAW3D
 653       if (DefaultDepthOfScreen (XtScreen (dialog)) >= 16)
 654         {
 655           /* Turn of dithered shadow if we can.  Looks bad */
 656           XtSetArg (av [ac], "beNiceToColormap", False); ac++;
 657         }
 658 #endif
 659       sprintf (button_name, "button%d", ++bc);
 660       button = XtCreateManagedWidget (button_name, commandWidgetClass,
 661                                       dialog, av, ac);
 662 #ifdef HAVE_XFT
 663       if (xft_font)
 664         {
 665           fill_xft_data (&instance->xft_data[bc], button, xft_font);
 666           XtOverrideTranslations (button, button_override);
 667         }
 668 #endif
 669     }
 670
 671   return dialog;
 672 }
 673
 674 Widget
 675 xaw_create_dialog (widget_instance *instance)
 676 {
 677   char *name = instance->info->type;
 678   Widget parent = instance->parent;
 679   Widget widget;
 680   Boolean pop_up_p = instance->pop_up_p;
 681   char *shell_name = 0;
 682   char *icon_name = 0;
 683   Boolean text_input_slot = False;
 684   Boolean radio_box = False;
 685   Boolean list = False;
 686   int total_buttons;
 687   int left_buttons = 0;
 688   int right_buttons = 1;
 689
 690   switch (name [0]) {
 691   case 'E': case 'e':
 692     icon_name = "dbox-error";
 693     shell_name = "Error";
 694     break;
 695
 696   case 'I': case 'i':
 697     icon_name = "dbox-info";
 698     shell_name = "Information";
 699     break;
 700
 701   case 'L': case 'l':
 702     list = True;
 703     icon_name = "dbox-question";
 704     shell_name = "Prompt";
 705     break;
 706
 707   case 'P': case 'p':
 708     text_input_slot = True;
 709     icon_name = "dbox-question";
 710     shell_name = "Prompt";
 711     break;
 712
 713   case 'Q': case 'q':
 714     icon_name = "dbox-question";
 715     shell_name = "Question";
 716     break;
 717   }
 718
 719   total_buttons = name [1] - '0';
 720
 721   if (name [3] == 'T' || name [3] == 't')
 722     {
 723       text_input_slot = False;
 724       radio_box = True;
 725     }
 726   else if (name [3])
 727     right_buttons = name [4] - '0';
 728
 729   left_buttons = total_buttons - right_buttons;
 730
 731   widget = make_dialog (name, parent, pop_up_p,
 732                         shell_name, icon_name, text_input_slot, radio_box,
 733                         list, left_buttons, right_buttons, instance);
 734   return widget;
 735 }
 736
 737
 738 static void
 739 xaw_generic_callback (Widget widget, XtPointer closure, XtPointer call_data)
 740 {
 741   widget_instance *instance = (widget_instance *) closure;
 742   Widget instance_widget;
 743   LWLIB_ID id;
 744   XtPointer user_data;
 745
 746   lw_internal_update_other_instances (widget, closure, call_data);
 747
 748   if (! instance)
 749     return;
 750   if (widget->core.being_destroyed)
 751     return;
 752
 753   instance_widget = instance->widget;
 754   if (!instance_widget)
 755     return;
 756
 757   id = instance->info->id;
 758
 759   /* Damn!  Athena doesn't give us a way to hang our own data on the
 760      buttons, so we have to go find it...  I guess this assumes that
 761      all instances of a button have the same call data. */
 762   {
 763     widget_value *val = instance->info->val->contents;
 764     char *name = XtName (widget);
 765     while (val)
 766       {
 767         if (val->name && !strcmp (val->name, name))
 768           break;
 769         val = val->next;
 770       }
 771     if (! val) abort ();
 772     user_data = val->call_data;
 773   }
 774
 775   if (instance->info->selection_cb)
 776     instance->info->selection_cb (widget, id, user_data);
 777 }
 778
 779 static void
 780 wm_delete_window (Widget w,
 781                   XEvent *event,
 782                   String *params,
 783                   Cardinal *num_params)
 784 {
 785   LWLIB_ID id;
 786   Cardinal nkids;
 787   int i;
 788   Widget *kids = 0;
 789   Widget widget = 0, shell;
 790
 791   if (XtIsSubclass (w, dialogWidgetClass))
 792     shell = XtParent (w);
 793   else
 794     shell = w;
 795
 796   if (! XtIsSubclass (shell, shellWidgetClass))
 797     abort ();
 798   XtVaGetValues (shell, XtNnumChildren, &nkids, NULL);
 799   XtVaGetValues (shell, XtNchildren, &kids, NULL);
 800   if (!kids || !*kids)
 801     abort ();
 802   for (i = 0; i < nkids; i++)
 803     {
 804       widget = kids[i];
 805       if (XtIsSubclass (widget, dialogWidgetClass))
 806         break;
 807     }
 808   if (! widget) return;
 809
 810   id = lw_get_widget_id (widget);
 811   if (! id) abort ();
 812
 813   {
 814     widget_info *info = lw_get_widget_info (id);
 815     if (! info) abort ();
 816     if (info->selection_cb)
 817       info->selection_cb (widget, id, (XtPointer) -1);
 818   }
 819
 820   lw_destroy_all_widgets (id);
 821 }
 822
 823 \f
 824
 825 static Widget
 826 xaw_create_main (widget_instance *instance)
 827 {
 828   Arg al[1];
 829   int ac;
 830
 831   /* Create a vertical Paned to hold menubar */
 832   ac = 0;
 833   XtSetArg (al[ac], XtNborderWidth, 0); ac++;
 834   return XtCreateWidget (instance->info->name, panedWidgetClass,
 835                          instance->parent, al, ac);
 836 }
 837
 838 widget_creation_entry
 839 xaw_creation_table [] =
 840 {
 841   {"main",                      xaw_create_main},
 842   {NULL, NULL}
 843 };