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(string const & text)
 113 {
 114         if (!browser) return;
 115         fl_add_browser_line(browser, text.c_str());
 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.c_str());
 122                 else
 123                         fl_set_object_label(label, text.c_str());
 124         }
 125         is_empty = false;
 126 }
 127
 128
 129 bool Combox::select_text(string const & t)
 130 {
 131         if (!browser || t.empty()) return false;
 132         int const maxline = fl_get_browser_maxline(browser);
 133
 134         for (int i = 1; i <= maxline; ++i) {
 135                 if (t == fl_get_browser_line(browser, i)) {
 136                         select(i);
 137                         return true;
 138                 }
 139         }
 140         return false;  // t does not exist in browser
 141 }
 142
 143
 144 void Combox::select(int i)
 145 {
 146         if (!browser || !button) return;
 147         if (i > 0 && i <= fl_get_browser_maxline(browser)) sel = i;
 148         fl_deactivate_object(button);
 149
 150         if (type == FL_COMBOX_INPUT)
 151                 fl_set_input(label, fl_get_browser_line(browser, sel));
 152         else
 153                 fl_set_object_label(label, fl_get_browser_line(browser, sel));
 154         fl_activate_object(button);
 155 }
 156
 157
 158 void Combox::add(int x, int y, int w, int hmin, int hmax)
 159 {
 160         FL_OBJECT * obj;
 161
 162         switch(type) {
 163         case FL_COMBOX_DROPLIST:
 164         {
 165                 button = obj = fl_add_button(FL_NORMAL_BUTTON,
 166                                              x+w-22, y, 22, hmin, "@2->");
 167                 fl_set_object_color(obj, FL_MCOL, FL_MCOL);
 168                 fl_set_object_dblbuffer(obj, 1);
 169                 fl_set_object_callback(obj, C_Combox_combo_cb, 0);
 170                 label = obj = fl_add_button(FL_NORMAL_TEXT, x, y, w-22, hmin, "");
 171                 fl_set_object_boxtype(obj, FL_DOWN_BOX);
 172                 fl_set_object_color(obj, FL_MCOL, FL_BLACK);
 173                 fl_set_object_lalign(obj, FL_ALIGN_CENTER|FL_ALIGN_INSIDE);
 174                 fl_set_object_dblbuffer(obj, 1);
 175                 fl_set_object_callback(obj, C_Combox_combo_cb, 0);
 176                 break;
 177         }
 178         case FL_COMBOX_NORMAL:
 179         {
 180                 button = obj = fl_add_button(FL_NORMAL_BUTTON, x, y, w, hmin, "");
 181                 fl_set_object_color(obj, FL_MCOL, FL_MCOL);
 182                 fl_set_object_boxtype(obj, FL_DOWN_BOX);
 183                 fl_set_object_callback(obj, C_Combox_combo_cb, 0);
 184                 fl_set_object_color(obj, FL_MCOL, FL_BLACK);
 185                 label = button;
 186                 break;
 187         }
 188         case FL_COMBOX_INPUT:
 189         {
 190                 button = obj = fl_add_button(FL_NORMAL_BUTTON,
 191                                              x+w-22, y, 22, hmin, "@2->");
 192                 fl_set_object_color(obj, FL_MCOL, FL_MCOL);
 193                 fl_set_object_callback(obj, C_Combox_combo_cb, 0);
 194                 label = obj = fl_add_input(FL_NORMAL_INPUT, x, y, w-22, hmin, "");
 195                 fl_set_object_boxtype(obj, FL_DOWN_BOX);
 196                 fl_set_object_return(obj, FL_RETURN_END_CHANGED);
 197                 fl_set_object_callback(obj, C_Combox_input_cb, 0);
 198                 //fl_set_object_color(obj, FL_MCOL, FL_BLACK);
 199                 //fl_set_object_lalign(obj,FL_ALIGN_CENTER|FL_ALIGN_INSIDE);
 200                 break;
 201         }
 202         } // end of switch
 203
 204         label->u_vdata = this;
 205         button->u_vdata = this;
 206
 207         // Hmm, it seems fl_create_browser is broken in xforms 0.86.
 208         // We have to work around that by creating the dropped browser form
 209         // at this point already. However, this means that we have
 210         // to do a little hacking: (Asger)
 211         FL_FORM * current_form = fl_current_form;
 212         fl_end_form();
 213
 214         bw = w + 20; bh = hmax - hmin - 12;
 215
 216         form = fl_bgn_form(FL_NO_BOX, bw, bh);
 217         browser = obj = fl_add_browser(FL_HOLD_BROWSER, 0, 0, bw, bh, "");
 218         fl_set_object_boxtype(obj, FL_UP_BOX);
 219         fl_set_object_color(obj, FL_MCOL, FL_YELLOW);
 220         fl_set_object_gravity(obj, NorthWestGravity, NorthWestGravity);
 221         fl_set_object_callback(obj, C_Combox_combo_cb, 2);
 222         fl_end_form();
 223         browser->u_vdata = this;
 224         form->u_vdata = browser;
 225         fl_register_raw_callback(form,
 226                                  ButtonPressMask|KeyPressMask,
 227                                  C_Combox_peek_event);
 228
 229         // And revert to adding to the old form (Asger)
 230         fl_addto_form(current_form);
 231 }
 232
 233
 234 static Window save_window;
 235
 236
 237 void Combox::Redraw()
 238 {
 239         if (browser) fl_redraw_object(browser);
 240         if (button) fl_redraw_object(button);
 241         if (label) fl_redraw_object(label);
 242 }
 243
 244 void Combox::Show()
 245 {
 246         if (_pre) _pre();
 247
 248         int tmp;
 249         XGetInputFocus(fl_display, &save_window, &tmp); //BUG-Fix Dietmar
 250         XFlush(fl_display);
 251         if (button && type != FL_COMBOX_NORMAL) {
 252                 fl_set_object_label(button, "@2<-");
 253                 fl_redraw_object(button);
 254         }
 255         int x = label->form->x + label->x, y = label->form->y + label->y;
 256         fl_set_form_position(form, x, y + label->h);
 257         fl_show_form(form, FL_PLACE_POSITION, FL_NOBORDER, "");
 258         if (sel>0) {
 259                 fl_set_browser_topline(browser, sel);
 260                 fl_select_browser_line(browser, sel);
 261         }
 262         XGrabPointer(fl_display, form->window, false,
 263                      ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
 264                      GrabModeAsync, GrabModeAsync,
 265                      0, 0, 0);
 266         XFlush(fl_display);
 267 }
 268
 269 void Combox::Hide(int who)
 270 {
 271         if (!who && browser && label) {
 272                 sel = fl_get_browser(browser);
 273
 274                 if (type == FL_COMBOX_INPUT)
 275                         fl_set_input(label, fl_get_browser_line(browser, sel));
 276                 else
 277                         fl_set_object_label(label,
 278                                             fl_get_browser_line(browser, sel));
 279 //              if (callback) callback(sel, cb_arg);
 280         }
 281         XUngrabPointer(fl_display, 0);
 282         XFlush(fl_display);
 283         if (!who && browser && label && callback)
 284             callback(sel, cb_arg, this);
 285         if (form) {
 286                 fl_hide_form(form);
 287                 XSetInputFocus(fl_display, save_window,
 288                                RevertToParent, CurrentTime); // BUG-FIX-Dietmar
 289                 XFlush(fl_display);
 290         }
 291         if (button) {
 292                 if (type != FL_COMBOX_NORMAL){
 293                         fl_set_object_label(button, "@2->");
 294                         fl_redraw_object(button);
 295                 }
 296         }
 297         if (_post) _post();
 298 }
 299
 300
 301 void Combox::activate()
 302 {
 303         if (browser) fl_activate_object(browser);
 304         if (button) fl_activate_object(button);
 305         if (label) fl_activate_object(label);
 306 }
 307
 308
 309 void Combox::deactivate()
 310 {
 311         if (browser) fl_deactivate_object(browser);
 312         if (button) fl_deactivate_object(button);
 313         if (label) fl_deactivate_object(label);
 314 }
 315
 316 void Combox::input_cb(FL_OBJECT * ob, long)
 317 {
 318         Combox * combo = static_cast<Combox*>(ob->u_vdata);
 319
 320         char const * text = fl_get_input(ob);
 321
 322         combo->addto(text);
 323         combo->is_empty = false;
 324 }
 325
 326 extern "C" void C_Combox_input_cb(FL_OBJECT * ob, long data)
 327 {
 328   Combox::input_cb(ob, data);
 329 }
 330
 331
 332 void Combox::combo_cb(FL_OBJECT * ob, long data)
 333 {
 334         Combox * combo = static_cast<Combox*>(ob->u_vdata);
 335         switch (data) {
 336         case 0:
 337         {
 338                 int i = combo->get();
 339                 switch (fl_get_button_numb(ob)) {
 340                 case 2:
 341                 {
 342                         combo->select(--i);
 343                         if (combo->callback)
 344                                 combo->callback(combo->sel,
 345                                                 combo->cb_arg, combo);
 346                         break;
 347                 }
 348                 case 3:
 349                 {
 350                         combo->select(++i);
 351                         if (combo->callback)
 352                                 combo->callback(combo->sel,
 353                                                 combo->cb_arg, combo);
 354                         break;
 355                 }
 356                 default: combo->Show(); break;
 357                 }
 358                 break;
 359         }
 360         case 2:
 361                 combo->Hide();
 362                 break;
 363         }
 364 }
 365
 366 extern "C" void C_Combox_combo_cb(FL_OBJECT * ob, long data)
 367 {
 368         Combox::combo_cb(ob, data);
 369 }
 370
 371
 372 int Combox::peek_event(FL_FORM * form, void * xev)
 373 {
 374         FL_OBJECT * ob = static_cast<FL_OBJECT *>(form->u_vdata);
 375         Combox * combo = static_cast<Combox*>(ob->u_vdata);
 376
 377         // I don't know why belowmouse does not work, but it doesn't. (Asger)
 378         // Are we sure? Please verify. (Lgb)
 379         if (static_cast<XEvent *>(xev)->type == ButtonPress && (
 380                 static_cast<XEvent *>(xev)->xbutton.x - ob->x < 0 ||
 381                 static_cast<XEvent *>(xev)->xbutton.x - ob->x > ob->w ||
 382                 static_cast<XEvent *>(xev)->xbutton.y - ob->y < 0 ||
 383                 static_cast<XEvent *>(xev)->xbutton.y - ob->y > ob->h)) {
 384                 combo->Hide(1);
 385                 return 1;
 386         }
 387
 388         if (static_cast<XEvent*>(xev)->type != KeyPress) return 0;
 389
 390         char s_r[10]; s_r[9] = '\0';
 391         static int num_bytes;
 392         KeySym keysym_return;
 393         num_bytes = XLookupString(&static_cast<XEvent*>(xev)->xkey, s_r, 10,
 394                                   &keysym_return, 0);
 395         XFlush(fl_display);
 396         switch (keysym_return) {
 397         case XK_Down:
 398                 if (fl_get_browser(combo->browser) <
 399                     fl_get_browser_maxline(combo->browser))
 400                         fl_select_browser_line(combo->browser,
 401                                                fl_get_browser(combo->browser)+1);
 402                 if (fl_get_browser(combo->browser)>=
 403                     fl_get_browser_topline(combo->browser) +
 404                     fl_get_browser_screenlines(combo->browser))
 405                         fl_set_browser_topline(combo->browser,
 406                                                fl_get_browser(combo->browser)
 407                                                - fl_get_browser_screenlines(combo->browser)+1);
 408                 if (fl_get_browser(combo->browser)<
 409                     fl_get_browser_topline(combo->browser))
 410                         fl_set_browser_topline(combo->browser,
 411                                                fl_get_browser(combo->browser));
 412                 return 1;
 413         case XK_Up:
 414                 if (fl_get_browser(combo->browser) > 1)
 415                         fl_select_browser_line(combo->browser,
 416                                                fl_get_browser(combo->browser)-1);
 417                 if (fl_get_browser(combo->browser)>=
 418                     fl_get_browser_topline(combo->browser) +
 419                     fl_get_browser_screenlines(combo->browser))
 420                         fl_set_browser_topline(combo->browser,
 421                                                fl_get_browser(combo->browser)
 422                                                - fl_get_browser_screenlines(combo->browser)+1);
 423                 if (fl_get_browser(combo->browser) <
 424                     fl_get_browser_topline(combo->browser))
 425                         fl_set_browser_topline(combo->browser,
 426                                                fl_get_browser(combo->browser));
 427                 return 1;
 428         case XK_Return:
 429                 combo->Hide();
 430                 return 1;
 431         case XK_Escape:
 432                 combo->Hide(1);
 433                 return 1;
 434         }
 435         return 0;
 436 }
 437
 438 extern "C" int C_Combox_peek_event(FL_FORM * form, void *xev)
 439 {
 440         return Combox::peek_event(form, xev);
 441 }
 442
 443
 444 #ifdef TESTCOMBO
 445 typedef struct {
 446         FL_FORM *test;
 447         FL_OBJECT *bar;
 448         void *vdata;
 449         long ldata;
 450 } FD_test;
 451
 452 //Combox combo(FL_COMBOX_DROPLIST);
 453 Combox combo(FL_COMBOX_INPUT);
 454
 455 FD_test *fd_test;
 456
 457 FD_test *create_form_test(void)
 458 {
 459    FL_OBJECT *obj;
 460    FD_test *fdui = (FD_test *) fl_calloc(1, sizeof(*fdui));
 461
 462    fdui->test = fl_bgn_form(FL_NO_BOX, 320, 190);
 463    obj = fl_add_box(FL_UP_BOX, 0, 0, 320, 190, "");
 464    obj = fl_add_box(FL_DOWN_BOX, 10, 50, 300, 110, "");
 465    obj = fl_add_button(FL_NORMAL_BUTTON, 250, 10, 50, 30, _("Done"));
 466    combo.add(10, 15, 120, 25, 135);
 467    fl_end_form();
 468
 469   return fdui;
 470 }
 471
 472 void combo_cb(int i)
 473 {
 474    fprintf(stderr, "selected %d:%s\n", i, combo.getline());
 475 }
 476
 477 int main(int argc, char *argv[])
 478 {
 479         //int n1;
 480
 481    // Same defaults as in lyx
 482    FL_IOPT cntl;
 483    cntl.buttonFontSize = FL_NORMAL_SIZE;
 484    cntl.browserFontSize = FL_NORMAL_SIZE;
 485    cntl.labelFontSize = FL_NORMAL_SIZE;
 486    cntl.choiceFontSize = FL_NORMAL_SIZE;
 487    cntl.inputFontSize = FL_NORMAL_SIZE;
 488    cntl.borderWidth = -2;
 489    fl_set_defaults(FL_PDButtonFontSize, &cntl);
 490    fl_set_defaults(FL_PDBrowserFontSize, &cntl);
 491    fl_set_defaults(FL_PDLabelFontSize, &cntl);
 492    fl_set_defaults(FL_PDChoiceFontSize, &cntl);
 493    fl_set_defaults(FL_PDInputFontSize, &cntl);
 494    fl_set_defaults(FL_PDBorderWidth, &cntl);
 495    fl_initialize(&argc, argv, 0, 0, 0);
 496
 497    fd_test = create_form_test();
 498
 499    /* fill-in form initialization code */
 500    combo.addline("Title");
 501    combo.addline("Author");
 502    combo.addline("Date");
 503    combo.addline("Abstract");
 504    combo.addline("Chapter");
 505    combo.addline("Section");
 506    combo.addline("Subsection");
 507    combo.addline("List");
 508    combo.addline("Description");
 509    combo.addline("Verse");
 510    combo.addline("Verbatim");
 511    combo.setcallback(combo_cb);
 512 //   combo.select(4);
 513
 514    /* show the first form */
 515    fl_show_form(fd_test->test, FL_PLACE_CENTER, FL_FULLBORDER, "test");
 516    fl_do_forms();
 517    return 0;
 518 }
 519
 520 #endif