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)
  52         : type(t)
  53 {
  54    browser = button = 0;
  55    callback = 0;
  56    label = 0;
  57    cb_arg = 0;
  58    _pre = 0;
  59    _post = 0;
  60    sel = 0;
  61    form = 0;
  62 }
  63
  64
  65 Combox::~Combox()
  66 {
  67    remove();
  68 }
  69
  70
  71 void Combox::clear()
  72 {
  73         if (browser) fl_clear_browser(browser);
  74         sel = 0;
  75         if (type == FL_COMBOX_INPUT)
  76                 fl_set_input(label, "");
  77         else
  78                 fl_set_object_label(label, "");
  79         is_empty = true;
  80 }
  81
  82
  83 void Combox::remove()
  84 {
  85         lyxerr.debug() << "Button: " << button << endl;
  86         if (button) {
  87                 fl_delete_object(button);
  88                 fl_free_object(button);
  89         }
  90
  91         lyxerr.debug() << "Label: " << label << endl;
  92         if (label && label!= button) {
  93                 fl_delete_object(label);
  94                 fl_free_object(label);
  95         }
  96
  97         lyxerr.debug() << "Form: " << form << endl;
  98         lyxerr.debug() << "Browser: " << browser << endl;
  99         if (form && browser) {
 100            fl_delete_object(browser);
 101            fl_free_object(browser);
 102            fl_free_form(form);
 103         }
 104         button = 0;
 105         browser = 0;
 106         label = 0;
 107         form = 0;
 108         sel = 0;
 109         is_empty = true;
 110 }
 111
 112
 113 void Combox::addline(string const & text)
 114 {
 115         if (!browser) return;
 116         fl_add_browser_line(browser, text.c_str());
 117
 118         // By default the first item is selected
 119         if (!sel) {
 120                 sel = 1;
 121                 if (type == FL_COMBOX_INPUT)
 122                         fl_set_input(label, text.c_str());
 123                 else
 124                         fl_set_object_label(label, text.c_str());
 125         }
 126         is_empty = false;
 127 }
 128
 129
 130 bool Combox::select_text(string const & t)
 131 {
 132         if (!browser || t.empty()) return false;
 133         int const maxline = fl_get_browser_maxline(browser);
 134
 135         for (int i = 1; i <= maxline; ++i) {
 136                 if (t == fl_get_browser_line(browser, i)) {
 137                         select(i);
 138                         return true;
 139                 }
 140         }
 141         return false;  // t does not exist in browser
 142 }
 143
 144
 145 void Combox::select(int i)
 146 {
 147         if (!browser || !button) return;
 148         if (i > 0 && i <= fl_get_browser_maxline(browser)) sel = i;
 149         fl_deactivate_object(button);
 150
 151         if (type == FL_COMBOX_INPUT)
 152                 fl_set_input(label, fl_get_browser_line(browser, sel));
 153         else
 154                 fl_set_object_label(label, fl_get_browser_line(browser, sel));
 155         fl_activate_object(button);
 156 }
 157
 158
 159 void Combox::add(int x, int y, int w, int hmin, int hmax)
 160 {
 161         FL_OBJECT * obj;
 162
 163         switch (type) {
 164         case FL_COMBOX_DROPLIST:
 165         {
 166                 button = obj = fl_add_button(FL_NORMAL_BUTTON,
 167                                              x+w-22, y, 22, hmin, "@2->");
 168                 fl_set_object_color(obj, FL_MCOL, FL_MCOL);
 169                 fl_set_object_dblbuffer(obj, 1);
 170                 fl_set_object_callback(obj, C_Combox_combo_cb, 0);
 171                 label = obj = fl_add_button(FL_NORMAL_TEXT, x, y, w-22, hmin, "");
 172                 fl_set_object_boxtype(obj, FL_DOWN_BOX);
 173                 fl_set_object_color(obj, FL_MCOL, FL_BLACK);
 174                 fl_set_object_lalign(obj, FL_ALIGN_CENTER|FL_ALIGN_INSIDE);
 175                 fl_set_object_dblbuffer(obj, 1);
 176                 fl_set_object_callback(obj, C_Combox_combo_cb, 0);
 177                 break;
 178         }
 179         case FL_COMBOX_NORMAL:
 180         {
 181                 button = obj = fl_add_button(FL_NORMAL_BUTTON, x, y, w, hmin, "");
 182                 fl_set_object_color(obj, FL_MCOL, FL_MCOL);
 183                 fl_set_object_boxtype(obj, FL_DOWN_BOX);
 184                 fl_set_object_callback(obj, C_Combox_combo_cb, 0);
 185                 fl_set_object_color(obj, FL_MCOL, FL_BLACK);
 186                 label = button;
 187                 break;
 188         }
 189         case FL_COMBOX_INPUT:
 190         {
 191                 button = obj = fl_add_button(FL_NORMAL_BUTTON,
 192                                              x+w-22, y, 22, hmin, "@2->");
 193                 fl_set_object_color(obj, FL_MCOL, FL_MCOL);
 194                 fl_set_object_callback(obj, C_Combox_combo_cb, 0);
 195                 label = obj = fl_add_input(FL_NORMAL_INPUT, x, y, w-22, hmin, "");
 196                 fl_set_object_boxtype(obj, FL_DOWN_BOX);
 197                 fl_set_object_return(obj, FL_RETURN_END_CHANGED);
 198                 fl_set_object_callback(obj, C_Combox_input_cb, 0);
 199                 //fl_set_object_color(obj, FL_MCOL, FL_BLACK);
 200                 //fl_set_object_lalign(obj,FL_ALIGN_CENTER|FL_ALIGN_INSIDE);
 201                 break;
 202         }
 203         } // end of switch
 204
 205         label->u_vdata = this;
 206         button->u_vdata = this;
 207
 208         // Hmm, it seems fl_create_browser is broken in xforms 0.86.
 209         // We have to work around that by creating the dropped browser form
 210         // at this point already. However, this means that we have
 211         // to do a little hacking: (Asger)
 212         FL_FORM * current_form = fl_current_form;
 213         fl_end_form();
 214
 215         bw = w + 20; bh = hmax - hmin - 12;
 216
 217         form = fl_bgn_form(FL_NO_BOX, bw, bh);
 218         browser = obj = fl_add_browser(FL_HOLD_BROWSER, 0, 0, bw, bh, "");
 219         fl_set_object_boxtype(obj, FL_UP_BOX);
 220         fl_set_object_color(obj, FL_MCOL, FL_YELLOW);
 221         fl_set_object_gravity(obj, NorthWestGravity, NorthWestGravity);
 222         fl_set_object_callback(obj, C_Combox_combo_cb, 2);
 223         fl_end_form();
 224         browser->u_vdata = this;
 225         form->u_vdata = browser;
 226         fl_register_raw_callback(form,
 227                                  ButtonPressMask|KeyPressMask,
 228                                  C_Combox_peek_event);
 229
 230         // And revert to adding to the old form (Asger)
 231         fl_addto_form(current_form);
 232 }
 233
 234
 235 static Window save_window;
 236
 237
 238 void Combox::Redraw()
 239 {
 240         if (browser) fl_redraw_object(browser);
 241         if (button) fl_redraw_object(button);
 242         if (label) fl_redraw_object(label);
 243 }
 244
 245 void Combox::Show()
 246 {
 247         if (_pre) _pre();
 248
 249         int tmp;
 250         XGetInputFocus(fl_get_display(), &save_window, &tmp); //BUG-Fix Dietmar
 251         XFlush(fl_get_display());
 252         if (button && type != FL_COMBOX_NORMAL) {
 253                 fl_set_object_label(button, "@2<-");
 254                 fl_redraw_object(button);
 255         }
 256         int x = label->form->x + label->x, y = label->form->y + label->y;
 257         fl_set_form_position(form, x, y + label->h);
 258         fl_show_form(form, FL_PLACE_POSITION, FL_NOBORDER, "");
 259         if (sel>0) {
 260                 fl_set_browser_topline(browser, sel);
 261                 fl_select_browser_line(browser, sel);
 262         }
 263         XGrabPointer(fl_get_display(), form->window, false,
 264                      ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
 265                      GrabModeAsync, GrabModeAsync,
 266                      0, 0, 0);
 267         XFlush(fl_get_display());
 268 }
 269
 270 void Combox::Hide(int who)
 271 {
 272         if (!who && browser && label) {
 273                 sel = fl_get_browser(browser);
 274
 275                 if (type == FL_COMBOX_INPUT)
 276                         fl_set_input(label, fl_get_browser_line(browser, sel));
 277                 else
 278                         fl_set_object_label(label,
 279                                             fl_get_browser_line(browser, sel));
 280 //              if (callback) callback(sel, cb_arg);
 281         }
 282         XUngrabPointer(fl_get_display(), 0);
 283         XFlush(fl_get_display());
 284         if (!who && browser && label && callback)
 285             callback(sel, cb_arg, this);
 286         if (form) {
 287                 fl_hide_form(form);
 288                 XSetInputFocus(fl_get_display(), save_window,
 289                                RevertToParent, CurrentTime); // BUG-FIX-Dietmar
 290                 XFlush(fl_get_display());
 291         }
 292         if (button) {
 293                 if (type != FL_COMBOX_NORMAL){
 294                         fl_set_object_label(button, "@2->");
 295                         fl_redraw_object(button);
 296                 }
 297         }
 298         if (_post) _post();
 299 }
 300
 301
 302 void Combox::activate()
 303 {
 304         if (browser) fl_activate_object(browser);
 305         if (button) fl_activate_object(button);
 306         if (label) fl_activate_object(label);
 307 }
 308
 309
 310 void Combox::deactivate()
 311 {
 312         if (browser) fl_deactivate_object(browser);
 313         if (button) fl_deactivate_object(button);
 314         if (label) fl_deactivate_object(label);
 315 }
 316
 317
 318 void Combox::input_cb(FL_OBJECT * ob, long)
 319 {
 320         Combox * combo = static_cast<Combox*>(ob->u_vdata);
 321
 322         char const * text = fl_get_input(ob);
 323
 324         combo->addto(text ? text : string());
 325         combo->is_empty = false;
 326 }
 327
 328
 329 extern "C" void C_Combox_input_cb(FL_OBJECT * ob, long data)
 330 {
 331   Combox::input_cb(ob, data);
 332 }
 333
 334
 335 void Combox::combo_cb(FL_OBJECT * ob, long data)
 336 {
 337         Combox * combo = static_cast<Combox*>(ob->u_vdata);
 338         switch (data) {
 339         case 0:
 340         {
 341                 int const i = combo->get();
 342                 switch (fl_get_button_numb(ob)) {
 343                 case 2:
 344                 {
 345                         combo->select(i - 1);
 346                         if (combo->callback)
 347                                 combo->callback(combo->sel,
 348                                                 combo->cb_arg, combo);
 349                         break;
 350                 }
 351                 case 3:
 352                 {
 353                         combo->select(i + 1);
 354                         if (combo->callback)
 355                                 combo->callback(combo->sel,
 356                                                 combo->cb_arg, combo);
 357                         break;
 358                 }
 359                 default: combo->Show(); break;
 360                 }
 361                 break;
 362         }
 363         case 2:
 364                 combo->Hide();
 365                 break;
 366         }
 367 }
 368
 369 extern "C" void C_Combox_combo_cb(FL_OBJECT * ob, long data)
 370 {
 371         Combox::combo_cb(ob, data);
 372 }
 373
 374
 375 int Combox::peek_event(FL_FORM * form, void * xev)
 376 {
 377         FL_OBJECT * ob = static_cast<FL_OBJECT *>(form->u_vdata);
 378         Combox * combo = static_cast<Combox*>(ob->u_vdata);
 379
 380         // I don't know why belowmouse does not work, but it doesn't. (Asger)
 381         // Are we sure? Please verify. (Lgb)
 382         if (static_cast<XEvent *>(xev)->type == ButtonPress && (
 383                 static_cast<XEvent *>(xev)->xbutton.x - ob->x < 0 ||
 384                 static_cast<XEvent *>(xev)->xbutton.x - ob->x > ob->w ||
 385                 static_cast<XEvent *>(xev)->xbutton.y - ob->y < 0 ||
 386                 static_cast<XEvent *>(xev)->xbutton.y - ob->y > ob->h)) {
 387                 combo->Hide(1);
 388                 return 1;
 389         }
 390
 391         if (static_cast<XEvent*>(xev)->type != KeyPress) return 0;
 392
 393         char s_r[10]; s_r[9] = '\0';
 394         KeySym keysym_return;
 395         XLookupString(&static_cast<XEvent*>(xev)->xkey, s_r, 10,
 396                               &keysym_return, 0);
 397         XFlush(fl_get_display());
 398         switch (keysym_return) {
 399         case XK_Down:
 400                 if (fl_get_browser(combo->browser) <
 401                     fl_get_browser_maxline(combo->browser))
 402                         fl_select_browser_line(combo->browser,
 403                                                fl_get_browser(combo->browser)+1);
 404                 if (fl_get_browser(combo->browser)>=
 405                     fl_get_browser_topline(combo->browser) +
 406                     fl_get_browser_screenlines(combo->browser))
 407                         fl_set_browser_topline(combo->browser,
 408                                                fl_get_browser(combo->browser)
 409                                                - fl_get_browser_screenlines(combo->browser)+1);
 410                 if (fl_get_browser(combo->browser)<
 411                     fl_get_browser_topline(combo->browser))
 412                         fl_set_browser_topline(combo->browser,
 413                                                fl_get_browser(combo->browser));
 414                 return 1;
 415         case XK_Up:
 416                 if (fl_get_browser(combo->browser) > 1)
 417                         fl_select_browser_line(combo->browser,
 418                                                fl_get_browser(combo->browser)-1);
 419                 if (fl_get_browser(combo->browser)>=
 420                     fl_get_browser_topline(combo->browser) +
 421                     fl_get_browser_screenlines(combo->browser))
 422                         fl_set_browser_topline(combo->browser,
 423                                                fl_get_browser(combo->browser)
 424                                                - fl_get_browser_screenlines(combo->browser)+1);
 425                 if (fl_get_browser(combo->browser) <
 426                     fl_get_browser_topline(combo->browser))
 427                         fl_set_browser_topline(combo->browser,
 428                                                fl_get_browser(combo->browser));
 429                 return 1;
 430         case XK_Return:
 431                 combo->Hide();
 432                 return 1;
 433         case XK_Escape:
 434                 combo->Hide(1);
 435                 return 1;
 436         }
 437         return 0;
 438 }
 439
 440 extern "C" int C_Combox_peek_event(FL_FORM * form, void *xev)
 441 {
 442         return Combox::peek_event(form, xev);
 443 }
 444
 445
 446 #ifdef TESTCOMBO
 447 typedef struct {
 448         FL_FORM *test;
 449         FL_OBJECT *bar;
 450         void *vdata;
 451         long ldata;
 452 } FD_test;
 453
 454 //Combox combo(FL_COMBOX_DROPLIST);
 455 Combox combo(FL_COMBOX_INPUT);
 456
 457 FD_test *fd_test;
 458
 459 FD_test *create_form_test(void)
 460 {
 461    FL_OBJECT *obj;
 462    FD_test *fdui = (FD_test *) fl_calloc(1, sizeof(*fdui));
 463
 464    fdui->test = fl_bgn_form(FL_NO_BOX, 320, 190);
 465    obj = fl_add_box(FL_UP_BOX, 0, 0, 320, 190, "");
 466    obj = fl_add_box(FL_DOWN_BOX, 10, 50, 300, 110, "");
 467    obj = fl_add_button(FL_NORMAL_BUTTON, 250, 10, 50, 30, _("Done"));
 468    combo.add(10, 15, 120, 25, 135);
 469    fl_end_form();
 470
 471   return fdui;
 472 }
 473
 474 void combo_cb(int i)
 475 {
 476    fprintf(stderr, "selected %d:%s\n", i, combo.getline());
 477 }
 478
 479 int main(int argc, char *argv[])
 480 {
 481         //int n1;
 482
 483    // Same defaults as in lyx
 484    FL_IOPT cntl;
 485    cntl.buttonFontSize = FL_NORMAL_SIZE;
 486    cntl.browserFontSize = FL_NORMAL_SIZE;
 487    cntl.labelFontSize = FL_NORMAL_SIZE;
 488    cntl.choiceFontSize = FL_NORMAL_SIZE;
 489    cntl.inputFontSize = FL_NORMAL_SIZE;
 490    cntl.borderWidth = -2;
 491    fl_set_defaults(FL_PDButtonFontSize, &cntl);
 492    fl_set_defaults(FL_PDBrowserFontSize, &cntl);
 493    fl_set_defaults(FL_PDLabelFontSize, &cntl);
 494    fl_set_defaults(FL_PDChoiceFontSize, &cntl);
 495    fl_set_defaults(FL_PDInputFontSize, &cntl);
 496    fl_set_defaults(FL_PDBorderWidth, &cntl);
 497    fl_initialize(&argc, argv, 0, 0, 0);
 498
 499    fd_test = create_form_test();
 500
 501    /* fill-in form initialization code */
 502    combo.addline("Title");
 503    combo.addline("Author");
 504    combo.addline("Date");
 505    combo.addline("Abstract");
 506    combo.addline("Chapter");
 507    combo.addline("Section");
 508    combo.addline("Subsection");
 509    combo.addline("List");
 510    combo.addline("Description");
 511    combo.addline("Verse");
 512    combo.addline("Verbatim");
 513    combo.setcallback(combo_cb);
 514 //   combo.select(4);
 515
 516    /* show the first form */
 517    fl_show_form(fd_test->test, FL_PLACE_CENTER, FL_FULLBORDER, "test");
 518    fl_do_forms();
 519    return 0;
 520 }
 521
 522 #endif