lwlib/lwlib-Xaw.c

   1 /* The lwlib interface to Athena widgets.
   2    Copyright (C) 1993 Chuck Thompson <cthomp@cs.uiuc.edu>
   3
   4 This file is part of the Lucid Widget Library.
   5
   6 The Lucid Widget Library is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 1, or (at your option)
   9 any later version.
  10
  11 The Lucid Widget Library is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include <config.h>
  23 #endif
  24
  25 #include <stdio.h>
  26
  27 #include "lwlib-Xaw.h"
  28
  29 #include <X11/StringDefs.h>
  30 #include <X11/IntrinsicP.h>
  31 #include <X11/CoreP.h>
  32 #include <X11/Shell.h>
  33
  34 #include <X11/Xaw/Scrollbar.h>
  35 #include <X11/Xaw/Paned.h>
  36 #include <X11/Xaw/Dialog.h>
  37 #include <X11/Xaw/Form.h>
  38 #include <X11/Xaw/Command.h>
  39 #include <X11/Xaw/Label.h>
  40
  41 #include <X11/Xatom.h>
  42
  43 static void xaw_generic_callback (/*Widget, XtPointer, XtPointer*/);
  44
  45
  46 Boolean
  47 lw_xaw_widget_p (widget)
  48      Widget widget;
  49 {
  50   return (XtIsSubclass (widget, scrollbarWidgetClass) ||
  51           XtIsSubclass (widget, dialogWidgetClass));
  52 }
  53
  54 static void
  55 xaw_update_scrollbar (instance, widget, val)
  56      widget_instance *instance;
  57      Widget widget;
  58      widget_value *val;
  59 {
  60 #if 0
  61   if (val->scrollbar_data)
  62     {
  63       scrollbar_values *data = val->scrollbar_data;
  64       Dimension height, width;
  65       Dimension pos_x, pos_y;
  66       int widget_shown, widget_topOfThumb;
  67       float new_shown, new_topOfThumb;
  68
  69       XtVaGetValues (widget,
  70                      XtNheight, &height,
  71                      XtNwidth, &width,
  72                      XtNx, &pos_x,
  73                      XtNy, &pos_y,
  74                      XtNtopOfThumb, &widget_topOfThumb,
  75                      XtNshown, &widget_shown,
  76                      NULL);
  77
  78       /*
  79        * First size and position the scrollbar widget.
  80        * We need to position it to second-guess the Paned widget's notion
  81        * of what should happen when the WMShell gets resized.
  82        */
  83       if (height != data->scrollbar_height || pos_y != data->scrollbar_pos)
  84         {
  85           XtConfigureWidget (widget, pos_x, data->scrollbar_pos,
  86                              width, data->scrollbar_height, 0);
  87
  88           XtVaSetValues (widget,
  89                          XtNlength, data->scrollbar_height,
  90                          XtNthickness, width,
  91                          NULL);
  92         }
  93
  94       /*
  95        * Now the size the scrollbar's slider.
  96        */
  97       new_shown = (float) data->slider_size /
  98         (float) (data->maximum - data->minimum);
  99
 100       new_topOfThumb = (float) (data->slider_position - data->minimum) /
 101         (float) (data->maximum - data->minimum);
 102
 103       if (new_shown > 1.0)
 104         new_shown = 1.0;
 105       if (new_shown < 0)
 106         new_shown = 0;
 107
 108       if (new_topOfThumb > 1.0)
 109         new_topOfThumb = 1.0;
 110       if (new_topOfThumb < 0)
 111         new_topOfThumb = 0;
 112
 113       if (new_shown != widget_shown || new_topOfThumb != widget_topOfThumb)
 114         XawScrollbarSetThumb (widget, new_topOfThumb, new_shown);
 115     }
 116 #endif
 117 }
 118
 119 void
 120 xaw_update_one_widget (instance, widget, val, deep_p)
 121      widget_instance *instance;
 122      Widget widget;
 123      widget_value *val;
 124      Boolean deep_p;
 125 {
 126 #if 0
 127   if (XtIsSubclass (widget, scrollbarWidgetClass))
 128     {
 129       xaw_update_scrollbar (instance, widget, val);
 130     }
 131 #endif
 132   if (XtIsSubclass (widget, dialogWidgetClass))
 133     {
 134       Arg al[1];
 135       int ac = 0;
 136       XtSetArg (al[ac], XtNlabel, val->contents->value); ac++;
 137       XtSetValues (widget,  al, ac);
 138     }
 139   else if (XtIsSubclass (widget, commandWidgetClass))
 140     {
 141       Dimension bw = 0;
 142       Arg al[3];
 143
 144       XtVaGetValues (widget, XtNborderWidth, &bw, NULL);
 145       if (bw == 0)
 146         /* Don't let buttons end up with 0 borderwidth, that's ugly...
 147            Yeah, all this should really be done through app-defaults files
 148            or fallback resources, but that's a whole different can of worms
 149            that I don't feel like opening right now.  Making Athena widgets
 150            not look like shit is just entirely too much work.
 151          */
 152         {
 153           XtSetArg (al[0], XtNborderWidth, 1);
 154           XtSetValues (widget, al, 1);
 155         }
 156
 157       XtSetSensitive (widget, val->enabled);
 158       XtSetArg (al[0], XtNlabel, val->value);
 159       /* Force centered button text.  Se above. */
 160       XtSetArg (al[1], XtNjustify, XtJustifyCenter);
 161       XtSetValues (widget, al, 2);
 162       XtRemoveAllCallbacks (widget, XtNcallback);
 163       XtAddCallback (widget, XtNcallback, xaw_generic_callback, instance);
 164     }
 165 }
 166
 167 void
 168 xaw_update_one_value (instance, widget, val)
 169      widget_instance *instance;
 170      Widget widget;
 171      widget_value *val;
 172 {
 173   /* This function is not used by the scrollbars and those are the only
 174      Athena widget implemented at the moment so do nothing. */
 175   return;
 176 }
 177
 178 void
 179 xaw_destroy_instance (instance)
 180      widget_instance *instance;
 181 {
 182   if (XtIsSubclass (instance->widget, dialogWidgetClass))
 183     /* Need to destroy the Shell too. */
 184     XtDestroyWidget (XtParent (instance->widget));
 185   else
 186     XtDestroyWidget (instance->widget);
 187 }
 188
 189 void
 190 xaw_popup_menu (widget, event)
 191      Widget widget;
 192      XEvent *event;
 193 {
 194   /* An Athena menubar has not been implemented. */
 195   return;
 196 }
 197
 198 void
 199 xaw_pop_instance (instance, up)
 200      widget_instance *instance;
 201      Boolean up;
 202 {
 203   Widget widget = instance->widget;
 204
 205   if (up)
 206     {
 207       if (XtIsSubclass (widget, dialogWidgetClass))
 208         {
 209           /* For dialogs, we need to call XtPopup on the parent instead
 210              of calling XtManageChild on the widget.
 211              Also we need to hack the shell's WM_PROTOCOLS to get it to
 212              understand what the close box is supposed to do!!
 213            */
 214           Display *dpy = XtDisplay (widget);
 215           Widget shell = XtParent (widget);
 216           Atom props [2];
 217           int i = 0;
 218           props [i++] = XInternAtom (dpy, "WM_DELETE_WINDOW", False);
 219           XChangeProperty (dpy, XtWindow (shell),
 220                            XInternAtom (dpy, "WM_PROTOCOLS", False),
 221                            XA_ATOM, 32, PropModeAppend,
 222                            (unsigned char *) props, i);
 223
 224           /* Center the widget in its parent.  Why isn't this kind of crap
 225              done automatically?  I thought toolkits were supposed to make
 226              life easier?
 227            */
 228           {
 229             unsigned int x, y, w, h;
 230             Widget topmost = instance->parent;
 231             Arg args[2];
 232
 233             w = shell->core.width;
 234             h = shell->core.height;
 235             while (topmost->core.parent && XtIsRealized (topmost->core.parent))
 236               topmost = topmost->core.parent;
 237             if (topmost->core.width < w) x = topmost->core.x;
 238             else x = topmost->core.x + ((topmost->core.width - w) / 2);
 239             if (topmost->core.height < h) y = topmost->core.y;
 240             else y = topmost->core.y + ((topmost->core.height - h) / 2);
 241             /* Using XtMoveWidget caused the widget to come
 242                out in the wrong place with vtwm.
 243                Question of virtual vs real coords, perhaps.  */
 244             XtSetArg (args[0], XtNx, x);
 245             XtSetArg (args[1], XtNy, y);
 246             XtSetValues (shell, args, 2);
 247           }
 248
 249           /* Finally, pop it up. */
 250           XtPopup (shell, XtGrabNonexclusive);
 251         }
 252       else
 253         XtManageChild (widget);
 254     }
 255   else
 256     {
 257       if (XtIsSubclass (widget, dialogWidgetClass))
 258         XtUnmanageChild (XtParent (widget));
 259       else
 260         XtUnmanageChild (widget);
 261     }
 262 }
 263
 264 \f
 265 /* Dialog boxes */
 266
 267 static char overrideTrans[] =
 268         "<Message>WM_PROTOCOLS: lwlib_delete_dialog()";
 269 static void wm_delete_window();
 270 static XtActionsRec xaw_actions [] = {
 271   {"lwlib_delete_dialog", wm_delete_window}
 272 };
 273 static Boolean actions_initted = False;
 274
 275 static Widget
 276 make_dialog (name, parent, pop_up_p, shell_title, icon_name, text_input_slot, radio_box, list, left_buttons, right_buttons)
 277      char* name;
 278      Widget parent;
 279      Boolean pop_up_p;
 280      char* shell_title;
 281      char* icon_name;
 282      Boolean text_input_slot;
 283      Boolean radio_box;
 284      Boolean list;
 285      int left_buttons;
 286      int right_buttons;
 287 {
 288   Arg av [20];
 289   int ac = 0;
 290   int i, bc;
 291   char button_name [255];
 292   Widget shell;
 293   Widget dialog;
 294   Widget button;
 295   XtTranslations override;
 296
 297   if (! pop_up_p) abort (); /* not implemented */
 298   if (text_input_slot) abort (); /* not implemented */
 299   if (radio_box) abort (); /* not implemented */
 300   if (list) abort (); /* not implemented */
 301
 302   if (! actions_initted)
 303     {
 304       XtAppContext app = XtWidgetToApplicationContext (parent);
 305       XtAppAddActions (app, xaw_actions,
 306                        sizeof (xaw_actions) / sizeof (xaw_actions[0]));
 307       actions_initted = True;
 308     }
 309
 310   override = XtParseTranslationTable (overrideTrans);
 311
 312   ac = 0;
 313   XtSetArg (av[ac], XtNtitle, shell_title); ac++;
 314   XtSetArg (av[ac], XtNallowShellResize, True); ac++;
 315
 316   /* Don't allow any geometry request from the user.  */
 317   XtSetArg (av[ac], XtNgeometry, 0); ac++;
 318
 319   shell = XtCreatePopupShell ("dialog", transientShellWidgetClass,
 320                               parent, av, ac);
 321   XtOverrideTranslations (shell, override);
 322
 323   ac = 0;
 324   dialog = XtCreateManagedWidget (name, dialogWidgetClass, shell, av, ac);
 325
 326   bc = 0;
 327   button = 0;
 328   for (i = 0; i < left_buttons; i++)
 329     {
 330       ac = 0;
 331       XtSetArg (av [ac], XtNfromHoriz, button); ac++;
 332       XtSetArg (av [ac], XtNleft, XtChainLeft); ac++;
 333       XtSetArg (av [ac], XtNright, XtChainLeft); ac++;
 334       XtSetArg (av [ac], XtNtop, XtChainBottom); ac++;
 335       XtSetArg (av [ac], XtNbottom, XtChainBottom); ac++;
 336       XtSetArg (av [ac], XtNresizable, True); ac++;
 337       sprintf (button_name, "button%d", ++bc);
 338       button = XtCreateManagedWidget (button_name, commandWidgetClass,
 339                                       dialog, av, ac);
 340     }
 341   if (right_buttons)
 342     {
 343       /* Create a separator
 344
 345          I want the separator to take up the slack between the buttons on
 346          the right and the buttons on the left (that is I want the buttons
 347          after the separator to be packed against the right edge of the
 348          window) but I can't seem to make it do it.
 349        */
 350       ac = 0;
 351       XtSetArg (av [ac], XtNfromHoriz, button); ac++;
 352 /*  XtSetArg (av [ac], XtNfromVert, XtNameToWidget (dialog, "label")); ac++; */
 353       XtSetArg (av [ac], XtNleft, XtChainLeft); ac++;
 354       XtSetArg (av [ac], XtNright, XtChainRight); ac++;
 355       XtSetArg (av [ac], XtNtop, XtChainBottom); ac++;
 356       XtSetArg (av [ac], XtNbottom, XtChainBottom); ac++;
 357       XtSetArg (av [ac], XtNlabel, ""); ac++;
 358       XtSetArg (av [ac], XtNwidth, 30); ac++;   /* #### aaack!! */
 359       XtSetArg (av [ac], XtNborderWidth, 0); ac++;
 360       XtSetArg (av [ac], XtNshapeStyle, XmuShapeRectangle); ac++;
 361       XtSetArg (av [ac], XtNresizable, False); ac++;
 362       XtSetArg (av [ac], XtNsensitive, False); ac++;
 363       button = XtCreateManagedWidget ("separator",
 364                                       /* labelWidgetClass, */
 365                                       /* This has to be Command to fake out
 366                                          the Dialog widget... */
 367                                       commandWidgetClass,
 368                                       dialog, av, ac);
 369     }
 370   for (i = 0; i < right_buttons; i++)
 371     {
 372       ac = 0;
 373       XtSetArg (av [ac], XtNfromHoriz, button); ac++;
 374       XtSetArg (av [ac], XtNleft, XtChainRight); ac++;
 375       XtSetArg (av [ac], XtNright, XtChainRight); ac++;
 376       XtSetArg (av [ac], XtNtop, XtChainBottom); ac++;
 377       XtSetArg (av [ac], XtNbottom, XtChainBottom); ac++;
 378       XtSetArg (av [ac], XtNresizable, True); ac++;
 379       sprintf (button_name, "button%d", ++bc);
 380       button = XtCreateManagedWidget (button_name, commandWidgetClass,
 381                                       dialog, av, ac);
 382     }
 383
 384   return dialog;
 385 }
 386
 387 Widget
 388 xaw_create_dialog (instance)
 389      widget_instance* instance;
 390 {
 391   char *name = instance->info->type;
 392   Widget parent = instance->parent;
 393   Widget widget;
 394   Boolean pop_up_p = instance->pop_up_p;
 395   char *shell_name = 0;
 396   char *icon_name;
 397   Boolean text_input_slot = False;
 398   Boolean radio_box = False;
 399   Boolean list = False;
 400   int total_buttons;
 401   int left_buttons = 0;
 402   int right_buttons = 1;
 403
 404   switch (name [0]) {
 405   case 'E': case 'e':
 406     icon_name = "dbox-error";
 407     shell_name = "Error";
 408     break;
 409
 410   case 'I': case 'i':
 411     icon_name = "dbox-info";
 412     shell_name = "Information";
 413     break;
 414
 415   case 'L': case 'l':
 416     list = True;
 417     icon_name = "dbox-question";
 418     shell_name = "Prompt";
 419     break;
 420
 421   case 'P': case 'p':
 422     text_input_slot = True;
 423     icon_name = "dbox-question";
 424     shell_name = "Prompt";
 425     break;
 426
 427   case 'Q': case 'q':
 428     icon_name = "dbox-question";
 429     shell_name = "Question";
 430     break;
 431   }
 432
 433   total_buttons = name [1] - '0';
 434
 435   if (name [3] == 'T' || name [3] == 't')
 436     {
 437       text_input_slot = False;
 438       radio_box = True;
 439     }
 440   else if (name [3])
 441     right_buttons = name [4] - '0';
 442
 443   left_buttons = total_buttons - right_buttons;
 444
 445   widget = make_dialog (name, parent, pop_up_p,
 446                         shell_name, icon_name, text_input_slot, radio_box,
 447                         list, left_buttons, right_buttons);
 448
 449   return widget;
 450 }
 451
 452
 453 static void
 454 xaw_generic_callback (widget, closure, call_data)
 455      Widget widget;
 456      XtPointer closure;
 457      XtPointer call_data;
 458 {
 459   widget_instance *instance = (widget_instance *) closure;
 460   Widget instance_widget;
 461   LWLIB_ID id;
 462   XtPointer user_data;
 463
 464   lw_internal_update_other_instances (widget, closure, call_data);
 465
 466   if (! instance)
 467     return;
 468   if (widget->core.being_destroyed)
 469     return;
 470
 471   instance_widget = instance->widget;
 472   if (!instance_widget)
 473     return;
 474
 475   id = instance->info->id;
 476
 477 #if 0
 478   user_data = NULL;
 479   XtVaGetValues (widget, XtNuserData, &user_data, NULL);
 480 #else
 481   /* Damn!  Athena doesn't give us a way to hang our own data on the
 482      buttons, so we have to go find it...  I guess this assumes that
 483      all instances of a button have the same call data. */
 484   {
 485     widget_value *val = instance->info->val->contents;
 486     char *name = XtName (widget);
 487     while (val)
 488       {
 489         if (val->name && !strcmp (val->name, name))
 490           break;
 491         val = val->next;
 492       }
 493     if (! val) abort ();
 494     user_data = val->call_data;
 495   }
 496 #endif
 497
 498   if (instance->info->selection_cb)
 499     instance->info->selection_cb (widget, id, user_data);
 500 }
 501
 502 static void
 503 wm_delete_window (shell, closure, call_data)
 504      Widget shell;
 505      XtPointer closure;
 506      XtPointer call_data;
 507 {
 508   LWLIB_ID id;
 509   Cardinal nkids;
 510   int i;
 511   Widget *kids = 0;
 512   Widget widget;
 513   if (! XtIsSubclass (shell, shellWidgetClass))
 514     abort ();
 515   XtVaGetValues (shell, XtNnumChildren, &nkids, NULL);
 516   XtVaGetValues (shell, XtNchildren, &kids, NULL);
 517   if (!kids || !*kids)
 518     abort ();
 519   for (i = 0; i < nkids; i++)
 520     {
 521       widget = kids[i];
 522       if (XtIsSubclass (widget, dialogWidgetClass))
 523         break;
 524     }
 525   id = lw_get_widget_id (widget);
 526   if (! id) abort ();
 527
 528   {
 529     widget_info *info = lw_get_widget_info (id);
 530     if (! info) abort ();
 531     if (info->selection_cb)
 532       info->selection_cb (widget, id, (XtPointer) -1);
 533   }
 534
 535   lw_destroy_all_widgets (id);
 536 }
 537
 538 \f
 539 /* Scrollbars */
 540
 541 static void
 542 xaw_scrollbar_scroll (widget, closure, call_data)
 543      Widget widget;
 544      XtPointer closure;
 545      XtPointer call_data;
 546 {
 547 #if 0
 548   widget_instance *instance = (widget_instance *) closure;
 549   LWLIB_ID id;
 550   scroll_event event_data;
 551
 552   if (!instance || widget->core.being_destroyed)
 553     return;
 554
 555   id = instance->info->id;
 556   event_data.slider_value = 0;
 557   event_data.time = 0;
 558
 559   if ((int) call_data > 0)
 560     event_data.action = SCROLLBAR_PAGE_DOWN;
 561   else
 562     event_data.action = SCROLLBAR_PAGE_UP;
 563
 564   if (instance->info->pre_activate_cb)
 565     instance->info->pre_activate_cb (widget, id, (XtPointer) &event_data);
 566 #endif
 567 }
 568
 569 static void
 570 xaw_scrollbar_jump (widget, closure, call_data)
 571      Widget widget;
 572      XtPointer closure;
 573      XtPointer call_data;
 574 {
 575 #if 0
 576   widget_instance *instance = (widget_instance *) closure;
 577   LWLIB_ID id;
 578   scroll_event event_data;
 579   scrollbar_values *val =
 580     (scrollbar_values *) instance->info->val->scrollbar_data;
 581   float percent;
 582
 583   if (!instance || widget->core.being_destroyed)
 584     return;
 585
 586   id = instance->info->id;
 587
 588   percent = * (float *) call_data;
 589   event_data.slider_value =
 590     (int) (percent * (float) (val->maximum - val->minimum)) + val->minimum;
 591
 592   event_data.time = 0;
 593   event_data.action = SCROLLBAR_DRAG;
 594
 595   if (instance->info->pre_activate_cb)
 596     instance->info->pre_activate_cb (widget, id, (XtPointer) &event_data);
 597 #endif
 598 }
 599
 600 static Widget
 601 xaw_create_scrollbar (instance)
 602      widget_instance *instance;
 603 {
 604 #if 0
 605   Arg av[20];
 606   int ac = 0;
 607   Dimension width;
 608   Widget scrollbar;
 609
 610   XtVaGetValues (instance->parent, XtNwidth, &width, NULL);
 611
 612   XtSetArg (av[ac], XtNshowGrip, 0); ac++;
 613   XtSetArg (av[ac], XtNresizeToPreferred, 1); ac++;
 614   XtSetArg (av[ac], XtNallowResize, True); ac++;
 615   XtSetArg (av[ac], XtNskipAdjust, True); ac++;
 616   XtSetArg (av[ac], XtNwidth, width); ac++;
 617   XtSetArg (av[ac], XtNmappedWhenManaged, True); ac++;
 618
 619   scrollbar =
 620     XtCreateWidget (instance->info->name, scrollbarWidgetClass,
 621                     instance->parent, av, ac);
 622
 623   /* We have to force the border width to be 0 otherwise the
 624      geometry manager likes to start looping for awhile... */
 625   XtVaSetValues (scrollbar, XtNborderWidth, 0, NULL);
 626
 627   XtRemoveAllCallbacks (scrollbar, "jumpProc");
 628   XtRemoveAllCallbacks (scrollbar, "scrollProc");
 629
 630   XtAddCallback (scrollbar, "jumpProc", xaw_scrollbar_jump,
 631                  (XtPointer) instance);
 632   XtAddCallback (scrollbar, "scrollProc", xaw_scrollbar_scroll,
 633                  (XtPointer) instance);
 634
 635   return scrollbar;
 636 #endif
 637 }
 638
 639 static Widget
 640 xaw_create_main (instance)
 641      widget_instance *instance;
 642 {
 643   Arg al[1];
 644   int ac;
 645
 646   /* Create a vertical Paned to hold menubar */
 647   ac = 0;
 648   XtSetArg (al[ac], XtNborderWidth, 0); ac++;
 649   return XtCreateWidget (instance->info->name, panedWidgetClass,
 650                          instance->parent, al, ac);
 651 }
 652
 653 widget_creation_entry
 654 xaw_creation_table [] =
 655 {
 656   {"scrollbar",                 xaw_create_scrollbar},
 657   {"main",                      xaw_create_main},
 658   {NULL, NULL}
 659 };