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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #include <stdio.h>
  21
  22 #include "lwlib-Xaw.h"
  23
  24 #include <X11/StringDefs.h>
  25 #include <X11/IntrinsicP.h>
  26 #include <X11/CoreP.h>
  27 #include <X11/Shell.h>
  28
  29 #include <X11/Xaw/Scrollbar.h>
  30 #include <X11/Xaw/Paned.h>
  31 #include <X11/Xaw/Dialog.h>
  32 #include <X11/Xaw/Form.h>
  33 #include <X11/Xaw/Command.h>
  34 #include <X11/Xaw/Label.h>
  35
  36 #include <X11/Xatom.h>
  37
  38 static void xaw_generic_callback (Widget, XtPointer, XtPointer);
  39
  40
  41 Boolean
  42 lw_xaw_widget_p (widget)
  43      Widget widget;
  44 {
  45   return (XtIsSubclass (widget, scrollbarWidgetClass) ||
  46           XtIsSubclass (widget, dialogWidgetClass));
  47 }
  48
  49 static void
  50 xaw_update_scrollbar (instance, widget, val)
  51      widget_instance *instance;
  52      Widget widget;
  53      widget_value *val;
  54 {
  55 #if 0
  56   if (val->scrollbar_data)
  57     {
  58       scrollbar_values *data = val->scrollbar_data;
  59       Dimension height, width;
  60       Dimension pos_x, pos_y;
  61       int widget_shown, widget_topOfThumb;
  62       float new_shown, new_topOfThumb;
  63
  64       XtVaGetValues (widget,
  65                      XtNheight, &height,
  66                      XtNwidth, &width,
  67                      XtNx, &pos_x,
  68                      XtNy, &pos_y,
  69                      XtNtopOfThumb, &widget_topOfThumb,
  70                      XtNshown, &widget_shown,
  71                      0);
  72
  73       /*
  74        * First size and position the scrollbar widget.
  75        * We need to position it to second-guess the Paned widget's notion
  76        * of what should happen when the WMShell gets resized.
  77        */
  78       if (height != data->scrollbar_height || pos_y != data->scrollbar_pos)
  79         {
  80           XtConfigureWidget (widget, pos_x, data->scrollbar_pos,
  81                              width, data->scrollbar_height, 0);
  82
  83           XtVaSetValues (widget,
  84                          XtNlength, data->scrollbar_height,
  85                          XtNthickness, width,
  86                          0);
  87         }
  88
  89       /*
  90        * Now the size the scrollbar's slider.
  91        */
  92       new_shown = (float) data->slider_size /
  93         (float) (data->maximum - data->minimum);
  94
  95       new_topOfThumb = (float) (data->slider_position - data->minimum) /
  96         (float) (data->maximum - data->minimum);
  97
  98       if (new_shown > 1.0)
  99         new_shown = 1.0;
 100       if (new_shown < 0)
 101         new_shown = 0;
 102
 103       if (new_topOfThumb > 1.0)
 104         new_topOfThumb = 1.0;
 105       if (new_topOfThumb < 0)
 106         new_topOfThumb = 0;
 107
 108       if (new_shown != widget_shown || new_topOfThumb != widget_topOfThumb)
 109         XawScrollbarSetThumb (widget, new_topOfThumb, new_shown);
 110     }
 111 #endif
 112 }
 113
 114 void
 115 xaw_update_one_widget (instance, widget, val, deep_p)
 116      widget_instance *instance;
 117      Widget widget;
 118      widget_value *val;
 119      Boolean deep_p;
 120 {
 121 #if 0
 122   if (XtIsSubclass (widget, scrollbarWidgetClass))
 123     {
 124       xaw_update_scrollbar (instance, widget, val);
 125     }
 126 #endif
 127   if (XtIsSubclass (widget, dialogWidgetClass))
 128     {
 129       Arg al[1];
 130       int ac = 0;
 131       XtSetArg (al[ac], XtNlabel, val->contents->value); ac++;
 132       XtSetValues (widget,  al, ac);
 133     }
 134   else if (XtIsSubclass (widget, commandWidgetClass))
 135     {
 136       Dimension bw = 0;
 137       Arg al[3];
 138
 139       XtVaGetValues (widget, XtNborderWidth, &bw, 0);
 140       if (bw == 0)
 141         /* Don't let buttons end up with 0 borderwidth, that's ugly...
 142            Yeah, all this should really be done through app-defaults files
 143            or fallback resources, but that's a whole different can of worms
 144            that I don't feel like opening right now.  Making Athena widgets
 145            not look like shit is just entirely too much work.
 146          */
 147         {
 148           XtSetArg (al[0], XtNborderWidth, 1);
 149           XtSetValues (widget, al, 1);
 150         }
 151
 152       XtSetArg (al[0], XtNlabel, val->value);
 153       XtSetArg (al[1], XtNsensitive, val->enabled);
 154       /* Force centered button text.  Se above. */
 155       XtSetArg (al[2], XtNjustify, XtJustifyCenter);
 156       XtSetValues (widget, al, 3);
 157       XtRemoveAllCallbacks (widget, XtNcallback);
 158       XtAddCallback (widget, XtNcallback, xaw_generic_callback, instance);
 159     }
 160 }
 161
 162 void
 163 xaw_update_one_value (instance, widget, val)
 164      widget_instance *instance;
 165      Widget widget;
 166      widget_value *val;
 167 {
 168   /* This function is not used by the scrollbars and those are the only
 169      Athena widget implemented at the moment so do nothing. */
 170   return;
 171 }
 172
 173 void
 174 xaw_destroy_instance (instance)
 175      widget_instance *instance;
 176 {
 177   if (XtIsSubclass (instance->widget, dialogWidgetClass))
 178     /* Need to destroy the Shell too. */
 179     XtDestroyWidget (XtParent (instance->widget));
 180   else
 181     XtDestroyWidget (instance->widget);
 182 }
 183
 184 void
 185 xaw_popup_menu (widget)
 186      Widget widget;
 187 {
 188   /* An Athena menubar has not been implemented. */
 189   return;
 190 }
 191
 192 void
 193 xaw_pop_instance (instance, up)
 194      widget_instance *instance;
 195      Boolean up;
 196 {
 197   Widget widget = instance->widget;
 198
 199   if (up)
 200     {
 201       if (XtIsSubclass (widget, dialogWidgetClass))
 202         {
 203           /* For dialogs, we need to call XtPopup on the parent instead
 204              of calling XtManageChild on the widget.
 205              Also we need to hack the shell's WM_PROTOCOLS to get it to
 206              understand what the close box is supposed to do!!
 207            */
 208           Display *dpy = XtDisplay (widget);
 209           Widget shell = XtParent (widget);
 210           Atom props [2];
 211           int i = 0;
 212           props [i++] = XInternAtom (dpy, "WM_DELETE_WINDOW", False);
 213           XChangeProperty (dpy, XtWindow (shell),
 214                            XInternAtom (dpy, "WM_PROTOCOLS", False),
 215                            XA_ATOM, 32, PropModeAppend,
 216                            (unsigned char *) props, i);
 217
 218           /* Center the widget in its parent.  Why isn't this kind of crap
 219              done automatically?  I thought toolkits were supposed to make
 220              life easier?
 221            */
 222           {
 223             int x, y, w, h;
 224             Widget topmost = instance->parent;
 225             w = shell->core.width;
 226             h = shell->core.height;
 227             while (topmost->core.parent && XtIsRealized (topmost->core.parent))
 228               topmost = topmost->core.parent;
 229             if (topmost->core.width < w) x = topmost->core.x;
 230             else x = topmost->core.x + ((topmost->core.width - w) / 2);
 231             if (topmost->core.height < h) y = topmost->core.y;
 232             else y = topmost->core.y + ((topmost->core.height - h) / 2);
 233             XtMoveWidget (shell, x, y);
 234           }
 235
 236           /* Finally, pop it up. */
 237           XtPopup (shell, XtGrabNonexclusive);
 238         }
 239       else
 240         XtManageChild (widget);
 241     }
 242   else
 243     {
 244       if (XtIsSubclass (widget, dialogWidgetClass))
 245         XtUnmanageChild (XtParent (widget));
 246       else
 247         XtUnmanageChild (widget);
 248     }
 249 }
 250
 251 \f
 252 /* Dialog boxes */
 253
 254 static char overrideTrans[] =
 255         "<Message>WM_PROTOCOLS: lwlib_delete_dialog()";
 256 static void wm_delete_window();
 257 static XtActionsRec xaw_actions [] = {
 258   {"lwlib_delete_dialog", wm_delete_window}
 259 };
 260 static Boolean actions_initted = False;
 261
 262 static Widget
 263 make_dialog (name, parent, pop_up_p, shell_title, icon_name, text_input_slot, radio_box, list, left_buttons, right_buttons)
 264      char* name;
 265      Widget parent;
 266      Boolean pop_up_p;
 267      char* shell_title;
 268      char* icon_name;
 269      Boolean text_input_slot;
 270      Boolean radio_box;
 271      Boolean list;
 272      int left_buttons;
 273      int right_buttons;
 274 {
 275   Arg av [20];
 276   int ac = 0;
 277   int i, bc;
 278   char button_name [255];
 279   Widget shell;
 280   Widget dialog;
 281   Widget button;
 282   XtTranslations override;
 283
 284   if (! pop_up_p) abort (); /* not implemented */
 285   if (text_input_slot) abort (); /* not implemented */
 286   if (radio_box) abort (); /* not implemented */
 287   if (list) abort (); /* not implemented */
 288
 289   if (! actions_initted)
 290     {
 291       XtAppContext app = XtWidgetToApplicationContext (parent);
 292       XtAppAddActions (app, xaw_actions,
 293                        sizeof (xaw_actions) / sizeof (xaw_actions[0]));
 294       actions_initted = True;
 295     }
 296
 297   override = XtParseTranslationTable (overrideTrans);
 298
 299   ac = 0;
 300   XtSetArg (av[ac], XtNtitle, shell_title); ac++;
 301   XtSetArg (av[ac], XtNallowShellResize, True); ac++;
 302
 303   /* Don't allow any geometry request from the user.  */
 304   XtSetArg (av[ac], XtNgeometry, 0); ac++;
 305
 306   shell = XtCreatePopupShell ("dialog", transientShellWidgetClass,
 307                               parent, av, ac);
 308   XtOverrideTranslations (shell, override);
 309
 310   ac = 0;
 311   dialog = XtCreateManagedWidget (name, dialogWidgetClass, shell, av, ac);
 312
 313   bc = 0;
 314   button = 0;
 315   for (i = 0; i < left_buttons; i++)
 316     {
 317       ac = 0;
 318       XtSetArg (av [ac], XtNfromHoriz, button); ac++;
 319       XtSetArg (av [ac], XtNleft, XtChainLeft); ac++;
 320       XtSetArg (av [ac], XtNright, XtChainLeft); ac++;
 321       XtSetArg (av [ac], XtNtop, XtChainBottom); ac++;
 322       XtSetArg (av [ac], XtNbottom, XtChainBottom); ac++;
 323       XtSetArg (av [ac], XtNresizable, True); ac++;
 324       sprintf (button_name, "button%d", ++bc);
 325       button = XtCreateManagedWidget (button_name, commandWidgetClass,
 326                                       dialog, av, ac);
 327     }
 328   if (right_buttons)
 329     {
 330       /* Create a separator
 331
 332          I want the separator to take up the slack between the buttons on
 333          the right and the buttons on the left (that is I want the buttons
 334          after the separator to be packed against the right edge of the
 335          window) but I can't seem to make it do it.
 336        */
 337       ac = 0;
 338       XtSetArg (av [ac], XtNfromHoriz, button); ac++;
 339 /*  XtSetArg (av [ac], XtNfromVert, XtNameToWidget (dialog, "label")); ac++; */
 340       XtSetArg (av [ac], XtNleft, XtChainLeft); ac++;
 341       XtSetArg (av [ac], XtNright, XtChainRight); ac++;
 342       XtSetArg (av [ac], XtNtop, XtChainBottom); ac++;
 343       XtSetArg (av [ac], XtNbottom, XtChainBottom); ac++;
 344       XtSetArg (av [ac], XtNlabel, ""); ac++;
 345       XtSetArg (av [ac], XtNwidth, 30); ac++;   /* #### aaack!! */
 346       XtSetArg (av [ac], XtNborderWidth, 0); ac++;
 347       XtSetArg (av [ac], XtNshapeStyle, XmuShapeRectangle); ac++;
 348       XtSetArg (av [ac], XtNresizable, False); ac++;
 349       XtSetArg (av [ac], XtNsensitive, False); ac++;
 350       button = XtCreateManagedWidget ("separator",
 351                                       /* labelWidgetClass, */
 352                                       /* This has to be Command to fake out
 353                                          the Dialog widget... */
 354                                       commandWidgetClass,
 355                                       dialog, av, ac);
 356     }
 357   for (i = 0; i < right_buttons; i++)
 358     {
 359       ac = 0;
 360       XtSetArg (av [ac], XtNfromHoriz, button); ac++;
 361       XtSetArg (av [ac], XtNleft, XtChainRight); ac++;
 362       XtSetArg (av [ac], XtNright, XtChainRight); ac++;
 363       XtSetArg (av [ac], XtNtop, XtChainBottom); ac++;
 364       XtSetArg (av [ac], XtNbottom, XtChainBottom); ac++;
 365       XtSetArg (av [ac], XtNresizable, True); ac++;
 366       sprintf (button_name, "button%d", ++bc);
 367       button = XtCreateManagedWidget (button_name, commandWidgetClass,
 368                                       dialog, av, ac);
 369     }
 370
 371   return dialog;
 372 }
 373
 374 Widget
 375 xaw_create_dialog (instance)
 376      widget_instance* instance;
 377 {
 378   char *name = instance->info->type;
 379   Widget parent = instance->parent;
 380   Widget widget;
 381   Boolean pop_up_p = instance->pop_up_p;
 382   char *shell_name = 0;
 383   char *icon_name;
 384   Boolean text_input_slot = False;
 385   Boolean radio_box = False;
 386   Boolean list = False;
 387   int total_buttons;
 388   int left_buttons = 0;
 389   int right_buttons = 1;
 390
 391   switch (name [0]) {
 392   case 'E': case 'e':
 393     icon_name = "dbox-error";
 394     shell_name = "Error";
 395     break;
 396
 397   case 'I': case 'i':
 398     icon_name = "dbox-info";
 399     shell_name = "Information";
 400     break;
 401
 402   case 'L': case 'l':
 403     list = True;
 404     icon_name = "dbox-question";
 405     shell_name = "Prompt";
 406     break;
 407
 408   case 'P': case 'p':
 409     text_input_slot = True;
 410     icon_name = "dbox-question";
 411     shell_name = "Prompt";
 412     break;
 413
 414   case 'Q': case 'q':
 415     icon_name = "dbox-question";
 416     shell_name = "Question";
 417     break;
 418   }
 419
 420   total_buttons = name [1] - '0';
 421
 422   if (name [3] == 'T' || name [3] == 't')
 423     {
 424       text_input_slot = False;
 425       radio_box = True;
 426     }
 427   else if (name [3])
 428     right_buttons = name [4] - '0';
 429
 430   left_buttons = total_buttons - right_buttons;
 431
 432   widget = make_dialog (name, parent, pop_up_p,
 433                         shell_name, icon_name, text_input_slot, radio_box,
 434                         list, left_buttons, right_buttons);
 435
 436   return widget;
 437 }
 438
 439
 440 static void
 441 xaw_generic_callback (widget, closure, call_data)
 442      Widget widget;
 443      XtPointer closure;
 444      XtPointer call_data;
 445 {
 446   widget_instance *instance = (widget_instance *) closure;
 447   Widget instance_widget;
 448   LWLIB_ID id;
 449   XtPointer user_data;
 450
 451   lw_internal_update_other_instances (widget, closure, call_data);
 452
 453   if (! instance)
 454     return;
 455   if (widget->core.being_destroyed)
 456     return;
 457
 458   instance_widget = instance->widget;
 459   if (!instance_widget)
 460     return;
 461
 462   id = instance->info->id;
 463
 464 #if 0
 465   user_data = NULL;
 466   XtVaGetValues (widget, XtNuserData, &user_data, 0);
 467 #else
 468   /* Damn!  Athena doesn't give us a way to hang our own data on the
 469      buttons, so we have to go find it...  I guess this assumes that
 470      all instances of a button have the same call data. */
 471   {
 472     widget_value *val = instance->info->val->contents;
 473     char *name = XtName (widget);
 474     while (val)
 475       {
 476         if (val->name && !strcmp (val->name, name))
 477           break;
 478         val = val->next;
 479       }
 480     if (! val) abort ();
 481     user_data = val->call_data;
 482   }
 483 #endif
 484
 485   if (instance->info->selection_cb)
 486     instance->info->selection_cb (widget, id, user_data);
 487 }
 488
 489 static void
 490 wm_delete_window (shell, closure, call_data)
 491      Widget shell;
 492      XtPointer closure;
 493      XtPointer call_data;
 494 {
 495   LWLIB_ID id;
 496   Widget *kids = 0;
 497   Widget widget;
 498   if (! XtIsSubclass (shell, shellWidgetClass))
 499     abort ();
 500   XtVaGetValues (shell, XtNchildren, &kids, 0);
 501   if (!kids || !*kids)
 502     abort ();
 503   widget = kids [0];
 504   if (! XtIsSubclass (widget, dialogWidgetClass))
 505     abort ();
 506   id = lw_get_widget_id (widget);
 507   if (! id) abort ();
 508
 509   {
 510     widget_info *info = lw_get_widget_info (id);
 511     if (! info) abort ();
 512     if (info->selection_cb)
 513       info->selection_cb (widget, id, (XtPointer) -1);
 514   }
 515
 516   lw_destroy_all_widgets (id);
 517 }
 518
 519 \f
 520 /* Scrollbars */
 521
 522 static void
 523 xaw_scrollbar_scroll (widget, closure, call_data)
 524      Widget widget;
 525      XtPointer closure;
 526      XtPointer call_data;
 527 {
 528 #if 0
 529   widget_instance *instance = (widget_instance *) closure;
 530   LWLIB_ID id;
 531   scroll_event event_data;
 532
 533   if (!instance || widget->core.being_destroyed)
 534     return;
 535
 536   id = instance->info->id;
 537   event_data.slider_value = 0;
 538   event_data.time = 0;
 539
 540   if ((int) call_data > 0)
 541     event_data.action = SCROLLBAR_PAGE_DOWN;
 542   else
 543     event_data.action = SCROLLBAR_PAGE_UP;
 544
 545   if (instance->info->pre_activate_cb)
 546     instance->info->pre_activate_cb (widget, id, (XtPointer) &event_data);
 547 #endif
 548 }
 549
 550 static void
 551 xaw_scrollbar_jump (widget, closure, call_data)
 552      Widget widget;
 553      XtPointer closure;
 554      XtPointer call_data;
 555 {
 556 #if 0
 557   widget_instance *instance = (widget_instance *) closure;
 558   LWLIB_ID id;
 559   scroll_event event_data;
 560   scrollbar_values *val =
 561     (scrollbar_values *) instance->info->val->scrollbar_data;
 562   float percent;
 563
 564   if (!instance || widget->core.being_destroyed)
 565     return;
 566
 567   id = instance->info->id;
 568
 569   percent = * (float *) call_data;
 570   event_data.slider_value =
 571     (int) (percent * (float) (val->maximum - val->minimum)) + val->minimum;
 572
 573   event_data.time = 0;
 574   event_data.action = SCROLLBAR_DRAG;
 575
 576   if (instance->info->pre_activate_cb)
 577     instance->info->pre_activate_cb (widget, id, (XtPointer) &event_data);
 578 #endif
 579 }
 580
 581 static Widget
 582 xaw_create_scrollbar (instance)
 583      widget_instance *instance;
 584 {
 585 #if 0
 586   Arg av[20];
 587   int ac = 0;
 588   Dimension width;
 589   Widget scrollbar;
 590
 591   XtVaGetValues (instance->parent, XtNwidth, &width, 0);
 592
 593   XtSetArg (av[ac], XtNshowGrip, 0); ac++;
 594   XtSetArg (av[ac], XtNresizeToPreferred, 1); ac++;
 595   XtSetArg (av[ac], XtNallowResize, True); ac++;
 596   XtSetArg (av[ac], XtNskipAdjust, True); ac++;
 597   XtSetArg (av[ac], XtNwidth, width); ac++;
 598   XtSetArg (av[ac], XtNmappedWhenManaged, True); ac++;
 599
 600   scrollbar =
 601     XtCreateWidget (instance->info->name, scrollbarWidgetClass,
 602                     instance->parent, av, ac);
 603
 604   /* We have to force the border width to be 0 otherwise the
 605      geometry manager likes to start looping for awhile... */
 606   XtVaSetValues (scrollbar, XtNborderWidth, 0, 0);
 607
 608   XtRemoveAllCallbacks (scrollbar, "jumpProc");
 609   XtRemoveAllCallbacks (scrollbar, "scrollProc");
 610
 611   XtAddCallback (scrollbar, "jumpProc", xaw_scrollbar_jump,
 612                  (XtPointer) instance);
 613   XtAddCallback (scrollbar, "scrollProc", xaw_scrollbar_scroll,
 614                  (XtPointer) instance);
 615
 616   return scrollbar;
 617 #endif
 618 }
 619
 620 widget_creation_entry
 621 xaw_creation_table [] =
 622 {
 623   {"scrollbar",                 xaw_create_scrollbar},
 624   {NULL, NULL}
 625 };