src/combox.C

   1 // -*- C++ -*-
   2 /*
   3  *  Combox: A combination of two objects (a button and a browser) is
   4  *          encapsulated to get a combobox-like object. All XForms
   5  *          functions are hidden.
   6  *
   7  *  GNU Copyleft 1996 Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
   8  *                        and the LyX Team.
   9  *
  10  *  Dependencies:  Only XForms, but created to be used with LyX.
  11  *
  12  */
  13
  14 /* Change log:
  15  *
  16  *  2/06/1996,   Alejandro Aguilar Sierra
  17  *    Created and tested.
  18  *
  19  *  4/06/1996,   Alejandro Aguilar Sierra
  20  *    Added droplist mode (a button with a black down arrow at right)
  21  *    and support for middle and right buttons, as XForms choice object.
  22  *
  23  *  6/06/1996,   Lars Gullik Bjønnes
  24  *    Added a combox with an input object. and a pre and a post handle.
  25  *
  26  *  22/07/96,    Alejandro Aguilar Sierra
  27  *    Assigned to the browser its own popup window. No more need of
  28  *    external pre and post handlers to simulate the wanted behaviour.
  29  *
  30  */
  31
  32 #include <config.h>
  33
  34 #ifdef __GNUG__
  35 #pragma implementation
  36 #endif
  37
  38 #include "combox.h"
  39 #include <cstring>
  40
  41 #include "debug.h"
  42
  43 using std::endl;
  44
  45 // These are C wrappers around static members of Combox, used as
  46 // callbacks for xforms.
  47 extern "C" void C_Combox_input_cb(FL_OBJECT *ob, long);
  48 extern "C" void C_Combox_combo_cb(FL_OBJECT *ob, long data) ;
  49 extern "C" int C_Combox_peek_event(FL_FORM * form, void *xev);
  50
  51 Combox::Combox(combox_type t): type(t)
  52 {
  53    browser = button = 0;
  54    callback = 0;
  55    label = 0;
  56    cb_arg = 0;
  57    _pre = 0;
  58    _post = 0;
  59    sel = 0;
  60    form = 0;
  61 }
  62
  63
  64 Combox::~Combox()
  65 {
  66    remove();
  67 }
  68
  69
  70 void Combox::clear()
  71 {
  72         if (browser) fl_clear_browser(browser);
  73         sel = 0;
  74         if (type == FL_COMBOX_INPUT)
  75                 fl_set_input(label, "");
  76         else
  77                 fl_set_object_label(label, "");
  78         is_empty = true;
  79 }
  80
  81
  82 void Combox::remove()
  83 {
  84         lyxerr.debug() << "Button: " << button << endl;
  85         if (button) {
  86                 fl_delete_object(button);
  87                 fl_free_object(button);
  88         }
  89
  90         lyxerr.debug() << "Label: " << label << endl;
  91         if (label && label!= button) {
  92                 fl_delete_object(label);
  93                 fl_free_object(label);
  94         }
  95
  96         lyxerr.debug() << "Form: " << form << endl;
  97         lyxerr.debug() << "Browser: " << browser << endl;
  98         if (form && browser) {
  99            fl_delete_object(browser);
 100            fl_free_object(browser);
 101            fl_free_form(form);
 102         }
 103         button = 0;
 104         browser = 0;
 105         label = 0;
 106         form = 0;
 107         sel = 0;
 108         is_empty = true;
 109 }
 110
 111
 112 void Combox::addline(char const* text)
 113 {
 114         if (!browser) return;
 115         fl_add_browser_line(browser, text);
 116
 117         // By default the first item is selected
 118         if (!sel) {
 119                 sel = 1;
 120                 if (type == FL_COMBOX_INPUT)
 121                         fl_set_input(label, text);
 122                 else
 123                         fl_set_object_label(label, text);
 124         }
 125         is_empty = false;
 126 }
 127
 128
 129 bool Combox::select_text(char const* t)
 130 {
 131         if (!browser || !t) return false;
 132         for (int i = 1; i <= fl_get_browser_maxline(browser); ++i) {
 133                 if (!strcmp(t, fl_get_browser_line(browser, i))) {
 134                         select(i);
 135                         return true;
 136                 }
 137         }
 138         return false;  // t does not exist in browser
 139 }
 140
 141
 142 void Combox::select(int i)
 143 {
 144         if (!browser || !button) return;
 145         if (i>0 && i<= fl_get_browser_maxline(browser)) sel = i;
 146         fl_deactivate_object(button);
 147
 148         if (type == FL_COMBOX_INPUT)
 149                 fl_set_input(label, fl_get_browser_line(browser, sel));
 150         else
 151                 fl_set_object_label(label, fl_get_browser_line(browser, sel));
 152         fl_activate_object(button);
 153 }
 154
 155
 156 void Combox::add(int x, int y, int w, int hmin, int hmax)
 157 {
 158         FL_OBJECT *obj;
 159
 160         switch(type) {
 161         case FL_COMBOX_DROPLIST:
 162         {
 163                 button = obj = fl_add_button(FL_NORMAL_BUTTON,
 164                                              x+w-22, y, 22, hmin, "@2->");
 165                 fl_set_object_color(obj, FL_MCOL, FL_MCOL);
 166                 fl_set_object_dblbuffer(obj, 1);
 167                 fl_set_object_callback(obj, C_Combox_combo_cb, 0);
 168                 label = obj = fl_add_button(FL_NORMAL_TEXT, x, y, w-22, hmin, "");
 169                 fl_set_object_boxtype(obj, FL_DOWN_BOX);
 170                 fl_set_object_color(obj, FL_MCOL, FL_BLACK);
 171                 fl_set_object_lalign(obj, FL_ALIGN_CENTER|FL_ALIGN_INSIDE);
 172                 fl_set_object_dblbuffer(obj, 1);
 173                 fl_set_object_callback(obj, C_Combox_combo_cb, 0);
 174                 break;
 175         }
 176         case FL_COMBOX_NORMAL:
 177         {
 178                 button = obj = fl_add_button(FL_NORMAL_BUTTON, x, y, w, hmin, "");
 179                 fl_set_object_color(obj, FL_MCOL, FL_MCOL);
 180                 fl_set_object_boxtype(obj, FL_DOWN_BOX);
 181                 fl_set_object_callback(obj, C_Combox_combo_cb, 0);
 182                 fl_set_object_color(obj, FL_MCOL, FL_BLACK);
 183                 label = button;
 184                 break;
 185         }
 186         case FL_COMBOX_INPUT:
 187         {
 188                 button = obj = fl_add_button(FL_NORMAL_BUTTON,
 189                                              x+w-22, y, 22, hmin, "@2->");
 190                 fl_set_object_color(obj, FL_MCOL, FL_MCOL);
 191                 fl_set_object_callback(obj, C_Combox_combo_cb, 0);
 192                 label = obj = fl_add_input(FL_NORMAL_INPUT, x, y, w-22, hmin, "");
 193                 fl_set_object_boxtype(obj, FL_DOWN_BOX);
 194                 fl_set_object_return(obj, FL_RETURN_END_CHANGED);
 195                 fl_set_object_callback(obj, C_Combox_input_cb, 0);
 196                 //fl_set_object_color(obj, FL_MCOL, FL_BLACK);
 197                 //fl_set_object_lalign(obj,FL_ALIGN_CENTER|FL_ALIGN_INSIDE);
 198                 break;
 199         }
 200         } // end of switch
 201
 202         label->u_vdata = this;
 203         button->u_vdata = this;
 204
 205         // Hmm, it seems fl_create_browser is broken in xforms 0.86.
 206         // We have to work around that by creating the dropped browser form
 207         // at this point already. However, this means that we have
 208         // to do a little hacking: (Asger)
 209         FL_FORM * current_form = fl_current_form;
 210         fl_end_form();
 211
 212         bw = w + 20; bh = hmax - hmin - 12;
 213
 214         form = fl_bgn_form(FL_NO_BOX, bw, bh);
 215         browser = obj = fl_add_browser(FL_HOLD_BROWSER, 0, 0, bw, bh, "");
 216         fl_set_object_boxtype(obj, FL_UP_BOX);
 217         fl_set_object_color(obj, FL_MCOL, FL_YELLOW);
 218         fl_set_object_gravity(obj, NorthWestGravity, NorthWestGravity);
 219         fl_set_object_callback(obj, C_Combox_combo_cb, 2);
 220         fl_end_form();
 221         browser->u_vdata = this;
 222         form->u_vdata = browser;
 223         fl_register_raw_callback(form,
 224                                  ButtonPressMask|KeyPressMask,
 225                                  C_Combox_peek_event);
 226
 227         // And revert to adding to the old form (Asger)
 228         fl_addto_form(current_form);
 229 }
 230
 231
 232 static Window save_window;
 233
 234
 235 void Combox::Redraw()
 236 {
 237         if (browser) fl_redraw_object(browser);
 238         if (button) fl_redraw_object(button);
 239         if (label) fl_redraw_object(label);
 240 }
 241
 242 void Combox::Show()
 243 {
 244         if (_pre) _pre();
 245
 246         int tmp;
 247         XGetInputFocus(fl_display, &save_window, &tmp); //BUG-Fix Dietmar
 248         XFlush(fl_display);
 249         if (button && type != FL_COMBOX_NORMAL) {
 250                 fl_set_object_label(button, "@2<-");
 251                 fl_redraw_object(button);
 252         }
 253         int x = label->form->x + label->x, y = label->form->y + label->y;
 254         fl_set_form_position(form, x, y + label->h);
 255         fl_show_form(form, FL_PLACE_POSITION, FL_NOBORDER, "");
 256         if (sel>0) {
 257                 fl_set_browser_topline(browser, sel);
 258                 fl_select_browser_line(browser, sel);
 259         }
 260         XGrabPointer(fl_display, form->window, false,
 261                      ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
 262                      GrabModeAsync, GrabModeAsync,
 263                      0, 0, 0);
 264         XFlush(fl_display);
 265 }
 266
 267 void Combox::Hide(int who)
 268 {
 269         if (!who && browser && label) {
 270                 sel = fl_get_browser(browser);
 271
 272                 if (type == FL_COMBOX_INPUT)
 273                         fl_set_input(label, fl_get_browser_line(browser, sel));
 274                 else
 275                         fl_set_object_label(label,
 276                                             fl_get_browser_line(browser, sel));
 277                 if (callback) callback(sel, cb_arg);
 278         }
 279         XUngrabPointer(fl_display, 0);
 280         XFlush(fl_display);
 281         if (form) {
 282                 fl_hide_form(form);
 283                 XSetInputFocus(fl_display, save_window,
 284                                RevertToParent, CurrentTime); // BUG-FIX-Dietmar
 285                 XFlush(fl_display);
 286         }
 287         if (button) {
 288                 if (type != FL_COMBOX_NORMAL){
 289                         fl_set_object_label(button, "@2->");
 290                         fl_redraw_object(button);
 291                 }
 292         }
 293         if (_post) _post();
 294 }
 295
 296
 297 void Combox::activate()
 298 {
 299         if (browser) fl_activate_object(browser);
 300         if (button) fl_activate_object(button);
 301         if (label) fl_activate_object(label);
 302 }
 303
 304
 305 void Combox::deactivate()
 306 {
 307         if (browser) fl_deactivate_object(browser);
 308         if (button) fl_deactivate_object(button);
 309         if (label) fl_deactivate_object(label);
 310 }
 311
 312 void Combox::input_cb(FL_OBJECT *ob, long)
 313 {
 314         Combox * combo = static_cast<Combox*>(ob->u_vdata);
 315
 316         char const * text = fl_get_input(ob);
 317
 318         combo->addto(text);
 319         combo->is_empty = false;
 320 }
 321
 322 extern "C" void C_Combox_input_cb(FL_OBJECT * ob, long data)
 323 {
 324   Combox::input_cb(ob, data);
 325 }
 326
 327
 328 void Combox::combo_cb(FL_OBJECT * ob, long data)
 329 {
 330         Combox * combo = static_cast<Combox*>(ob->u_vdata);
 331         switch (data) {
 332         case 0:
 333         {
 334                 int i = combo->get();
 335                 switch (fl_get_button_numb(ob)) {
 336                 case 2:
 337                 {
 338                         combo->select(--i);
 339                         if (combo->callback)
 340                                 combo->callback(combo->sel,
 341                                                 combo->cb_arg);
 342                         break;
 343                 }
 344                 case 3:
 345                 {
 346                         combo->select(++i);
 347                         if (combo->callback)
 348                                 combo->callback(combo->sel,
 349                                                 combo->cb_arg);
 350                         break;
 351                 }
 352                 default: combo->Show(); break;
 353                 }
 354                 break;
 355         }
 356         case 2:
 357                 combo->Hide();
 358                 break;
 359         }
 360 }
 361
 362 extern "C" void C_Combox_combo_cb(FL_OBJECT * ob, long data)
 363 {
 364         Combox::combo_cb(ob, data);
 365 }
 366
 367
 368 int Combox::peek_event(FL_FORM * form, void * xev)
 369 {
 370         FL_OBJECT * ob = static_cast<FL_OBJECT *>(form->u_vdata);
 371         Combox * combo = static_cast<Combox*>(ob->u_vdata);
 372
 373         // I don't know why belowmouse does not work, but it doesn't. (Asger)
 374         // Are we sure? Please verify. (Lgb)
 375         if (static_cast<XEvent *>(xev)->type == ButtonPress && (
 376                 static_cast<XEvent *>(xev)->xbutton.x - ob->x < 0 ||
 377                 static_cast<XEvent *>(xev)->xbutton.x - ob->x > ob->w ||
 378                 static_cast<XEvent *>(xev)->xbutton.y - ob->y < 0 ||
 379                 static_cast<XEvent *>(xev)->xbutton.y - ob->y > ob->h)) {
 380                 combo->Hide(1);
 381                 return 1;
 382         }
 383
 384         if (static_cast<XEvent*>(xev)->type != KeyPress) return 0;
 385
 386         char s_r[10]; s_r[9] = '\0';
 387         static int num_bytes;
 388         KeySym keysym_return;
 389         num_bytes = XLookupString(&static_cast<XEvent*>(xev)->xkey, s_r, 10,
 390                                   &keysym_return, 0);
 391         XFlush(fl_display);
 392         switch (keysym_return) {
 393         case XK_Down:
 394                 if (fl_get_browser(combo->browser) <
 395                     fl_get_browser_maxline(combo->browser))
 396                         fl_select_browser_line(combo->browser,
 397                                                fl_get_browser(combo->browser)+1);
 398                 if (fl_get_browser(combo->browser)>=
 399                     fl_get_browser_topline(combo->browser) +
 400                     fl_get_browser_screenlines(combo->browser))
 401                         fl_set_browser_topline(combo->browser,
 402                                                fl_get_browser(combo->browser)
 403                                                - fl_get_browser_screenlines(combo->browser)+1);
 404                 if (fl_get_browser(combo->browser)<
 405                     fl_get_browser_topline(combo->browser))
 406                         fl_set_browser_topline(combo->browser,
 407                                                fl_get_browser(combo->browser));
 408                 return 1;
 409         case XK_Up:
 410                 if (fl_get_browser(combo->browser) > 1)
 411                         fl_select_browser_line(combo->browser,
 412                                                fl_get_browser(combo->browser)-1);
 413                 if (fl_get_browser(combo->browser)>=
 414                     fl_get_browser_topline(combo->browser) +
 415                     fl_get_browser_screenlines(combo->browser))
 416                         fl_set_browser_topline(combo->browser,
 417                                                fl_get_browser(combo->browser)
 418                                                - fl_get_browser_screenlines(combo->browser)+1);
 419                 if (fl_get_browser(combo->browser) <
 420                     fl_get_browser_topline(combo->browser))
 421                         fl_set_browser_topline(combo->browser,
 422                                                fl_get_browser(combo->browser));
 423                 return 1;
 424         case XK_Return:
 425                 combo->Hide();
 426                 return 1;
 427         case XK_Escape:
 428                 combo->Hide(1);
 429                 return 1;
 430         }
 431         return 0;
 432 }
 433
 434 extern "C" int C_Combox_peek_event(FL_FORM * form, void *xev)
 435 {
 436         return Combox::peek_event(form, xev);
 437 }
 438
 439
 440 #ifdef TESTCOMBO
 441 typedef struct {
 442         FL_FORM *test;
 443         FL_OBJECT *bar;
 444         void *vdata;
 445         long ldata;
 446 } FD_test;
 447
 448 //Combox combo(FL_COMBOX_DROPLIST);
 449 Combox combo(FL_COMBOX_INPUT);
 450
 451 FD_test *fd_test;
 452
 453 FD_test *create_form_test(void)
 454 {
 455    FL_OBJECT *obj;
 456    FD_test *fdui = (FD_test *) fl_calloc(1, sizeof(*fdui));
 457
 458    fdui->test = fl_bgn_form(FL_NO_BOX, 320, 190);
 459    obj = fl_add_box(FL_UP_BOX, 0, 0, 320, 190, "");
 460    obj = fl_add_box(FL_DOWN_BOX, 10, 50, 300, 110, "");
 461    obj = fl_add_button(FL_NORMAL_BUTTON, 250, 10, 50, 30, _("Done"));
 462    combo.add(10, 15, 120, 25, 135);
 463    fl_end_form();
 464
 465   return fdui;
 466 }
 467
 468 void combo_cb(int i)
 469 {
 470    fprintf(stderr, "selected %d:%s\n", i, combo.getline());
 471 }
 472
 473 int main(int argc, char *argv[])
 474 {
 475         //int n1;
 476
 477    // Same defaults as in lyx
 478    FL_IOPT cntl;
 479    cntl.buttonFontSize = FL_NORMAL_SIZE;
 480    cntl.browserFontSize = FL_NORMAL_SIZE;
 481    cntl.labelFontSize = FL_NORMAL_SIZE;
 482    cntl.choiceFontSize = FL_NORMAL_SIZE;
 483    cntl.inputFontSize = FL_NORMAL_SIZE;
 484    cntl.borderWidth = -2;
 485    fl_set_defaults(FL_PDButtonFontSize, &cntl);
 486    fl_set_defaults(FL_PDBrowserFontSize, &cntl);
 487    fl_set_defaults(FL_PDLabelFontSize, &cntl);
 488    fl_set_defaults(FL_PDChoiceFontSize, &cntl);
 489    fl_set_defaults(FL_PDInputFontSize, &cntl);
 490    fl_set_defaults(FL_PDBorderWidth, &cntl);
 491    fl_initialize(&argc, argv, 0, 0, 0);
 492
 493    fd_test = create_form_test();
 494
 495    /* fill-in form initialization code */
 496    combo.addline("Title");
 497    combo.addline("Author");
 498    combo.addline("Date");
 499    combo.addline("Abstract");
 500    combo.addline("Chapter");
 501    combo.addline("Section");
 502    combo.addline("Subsection");
 503    combo.addline("List");
 504    combo.addline("Description");
 505    combo.addline("Verse");
 506    combo.addline("Verbatim");
 507    combo.setcallback(combo_cb);
 508 //   combo.select(4);
 509
 510    /* show the first form */
 511    fl_show_form(fd_test->test, FL_PLACE_CENTER, FL_FULLBORDER, "test");
 512    fl_do_forms();
 513    return 0;
 514 }
 515
 516 #endif