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