WINGs/wbrowser.c

   1
   2
   3
   4
   5 #include "WINGsP.h"
   6
   7
   8 char *WMBrowserDidScrollNotification = "WMBrowserDidScrollNotification";
   9
  10
  11 typedef struct W_Browser {
  12     W_Class widgetClass;
  13     W_View *view;
  14
  15     char **titles;
  16     WMList **columns;
  17
  18     short columnCount;
  19     short usedColumnCount;             /* columns actually being used */
  20     short minColumnWidth;
  21
  22     short maxVisibleColumns;
  23     short firstVisibleColumn;
  24
  25     short titleHeight;
  26
  27     short selectedColumn;
  28
  29     WMSize columnSize;
  30
  31
  32     void *clientData;
  33     WMAction *action;
  34     void *doubleClientData;
  35     WMAction *doubleAction;
  36
  37     WMBrowserFillColumnProc *fillColumn;
  38
  39     WMScroller *scroller;
  40
  41     char *pathSeparator;
  42
  43     struct {
  44         unsigned int isTitled:1;
  45         unsigned int allowMultipleSelection:1;
  46         unsigned int hasScroller:1;
  47
  48         /* */
  49         unsigned int loaded:1;
  50         unsigned int loadingColumn:1;
  51     } flags;
  52 } Browser;
  53
  54
  55 #define COLUMN_SPACING  4
  56 #define TITLE_SPACING 2
  57
  58 #define DEFAULT_WIDTH           305
  59 #define DEFAULT_HEIGHT          200
  60 #define DEFAULT_HAS_SCROLLER    True
  61
  62 #define DEFAULT_SEPARATOR       "/"
  63
  64 #define COLUMN_IS_VISIBLE(b, c) ((c) >= (b)->firstVisibleColumn \
  65                                 && (c) < (b)->firstVisibleColumn + (b)->maxVisibleColumns)
  66
  67
  68 static void handleEvents(XEvent *event, void *data);
  69 static void destroyBrowser(WMBrowser *bPtr);
  70
  71 static void setupScroller(WMBrowser *bPtr);
  72
  73 static void scrollToColumn(WMBrowser *bPtr, int column);
  74
  75 static void paintItem(WMList *lPtr, Drawable d, char *text, int state,
  76                       WMRect *rect);
  77
  78 static void loadColumn(WMBrowser *bPtr, int column);
  79
  80
  81 static void resizeBrowser(WMWidget*, unsigned int, unsigned int);
  82
  83 W_ViewProcedureTable _BrowserViewProcedures = {
  84     NULL,
  85         resizeBrowser,
  86         NULL
  87 };
  88
  89
  90
  91 WMBrowser*
  92 WMCreateBrowser(WMWidget *parent)
  93 {
  94     WMBrowser *bPtr;
  95     int i;
  96
  97     bPtr = wmalloc(sizeof(WMBrowser));
  98     memset(bPtr, 0, sizeof(WMBrowser));
  99
 100     bPtr->widgetClass = WC_Browser;
 101
 102     bPtr->view = W_CreateView(W_VIEW(parent));
 103     if (!bPtr->view) {
 104         free(bPtr);
 105         return NULL;
 106     }
 107     bPtr->view->self = bPtr;
 108
 109     WMCreateEventHandler(bPtr->view, ExposureMask|StructureNotifyMask
 110                          |ClientMessageMask, handleEvents, bPtr);
 111
 112     /* default configuration */
 113     bPtr->flags.hasScroller = DEFAULT_HAS_SCROLLER;
 114
 115     bPtr->titleHeight = 20;
 116     bPtr->flags.isTitled = 1;
 117     bPtr->maxVisibleColumns = 2;
 118
 119     resizeBrowser(bPtr, DEFAULT_WIDTH, DEFAULT_HEIGHT);
 120
 121     bPtr->pathSeparator = wstrdup(DEFAULT_SEPARATOR);
 122
 123     if (bPtr->flags.hasScroller)
 124         setupScroller(bPtr);
 125
 126     for (i=0; i<bPtr->maxVisibleColumns; i++) {
 127         WMAddBrowserColumn(bPtr);
 128     }
 129     bPtr->usedColumnCount = 0;
 130
 131     bPtr->selectedColumn = -1;
 132
 133     return bPtr;
 134 }
 135
 136
 137 int
 138 WMGetBrowserNumberOfColumns(WMBrowser *bPtr)
 139 {
 140     return bPtr->usedColumnCount;
 141 }
 142
 143 void
 144 WMSetBrowserPathSeparator(WMBrowser *bPtr, char *separator)
 145 {
 146     if (bPtr->pathSeparator)
 147         free(bPtr->pathSeparator);
 148     bPtr->pathSeparator = wstrdup(separator);
 149 }
 150
 151
 152
 153 static void
 154 drawTitleOfColumn(WMBrowser *bPtr, int column)
 155 {
 156     WMScreen *scr = bPtr->view->screen;
 157     int x;
 158
 159     x=(column-bPtr->firstVisibleColumn)*(bPtr->columnSize.width+COLUMN_SPACING);
 160
 161     XFillRectangle(scr->display, bPtr->view->window, W_GC(scr->darkGray), x, 0,
 162                    bPtr->columnSize.width, bPtr->titleHeight);
 163     W_DrawRelief(scr, bPtr->view->window, x, 0,
 164                  bPtr->columnSize.width, bPtr->titleHeight, WRSunken);
 165
 166     if (column < bPtr->usedColumnCount && bPtr->titles[column])
 167         W_PaintText(bPtr->view, bPtr->view->window, scr->boldFont, x,
 168                     (bPtr->titleHeight-scr->boldFont->height)/2,
 169                     bPtr->columnSize.width, WACenter, W_GC(scr->white),
 170                     False, bPtr->titles[column], strlen(bPtr->titles[column]));
 171 }
 172
 173
 174 void
 175 WMSetBrowserColumnTitle(WMBrowser *bPtr, int column, char *title)
 176 {
 177     assert(column >= 0);
 178     assert(column < bPtr->usedColumnCount);
 179
 180     if (bPtr->titles[column])
 181         free(bPtr->titles[column]);
 182
 183     bPtr->titles[column] = wstrdup(title);
 184
 185     if (COLUMN_IS_VISIBLE(bPtr, column) && bPtr->flags.isTitled) {
 186         drawTitleOfColumn(bPtr, column);
 187     }
 188 }
 189
 190
 191 WMList*
 192 WMGetBrowserListInColumn(WMBrowser *bPtr, int column)
 193 {
 194     if (column < 0 || column >= bPtr->usedColumnCount)
 195         return NULL;
 196
 197     return bPtr->columns[column];
 198 }
 199
 200
 201 void
 202 WMSetBrowserFillColumnProc(WMBrowser *bPtr, WMBrowserFillColumnProc *proc)
 203 {
 204     bPtr->fillColumn = proc;
 205 }
 206
 207
 208 int
 209 WMGetBrowserFirstVisibleColumn(WMBrowser *bPtr)
 210 {
 211     return bPtr->firstVisibleColumn;
 212 }
 213
 214
 215 static void
 216 removeColumn(WMBrowser *bPtr, int column)
 217 {
 218     int i;
 219     WMList **clist;
 220     char **tlist;
 221
 222     if (column >= bPtr->usedColumnCount)
 223         return;
 224
 225     if (column < bPtr->maxVisibleColumns) {
 226         int tmp;
 227         for (i=column; i < bPtr->maxVisibleColumns; i++) {
 228             if (bPtr->titles[i])
 229                 free(bPtr->titles[i]);
 230             bPtr->titles[i] = NULL;
 231
 232             WMClearList(bPtr->columns[i]);
 233             bPtr->usedColumnCount--;
 234         }
 235         tmp = bPtr->columnCount;
 236         for (i=bPtr->maxVisibleColumns; i < tmp; i++) {
 237             if (bPtr->titles[i])
 238                 free(bPtr->titles[i]);
 239             bPtr->titles[i] = NULL;
 240
 241             WMDestroyWidget(bPtr->columns[i]);
 242             bPtr->columns[i] = NULL;
 243             bPtr->columnCount--;
 244             bPtr->usedColumnCount--;
 245         }
 246     } else {
 247         int tmp = bPtr->columnCount;
 248         for (i=column; i < tmp; i++) {
 249             if (bPtr->titles[i])
 250                 free(bPtr->titles[i]);
 251             bPtr->titles[i] = NULL;
 252
 253             WMDestroyWidget(bPtr->columns[i]);
 254             bPtr->columns[i] = NULL;
 255             bPtr->columnCount--;
 256             bPtr->usedColumnCount--;
 257         }
 258     }
 259     clist = wmalloc(sizeof(WMList*)*bPtr->columnCount);
 260     tlist = wmalloc(sizeof(char*)*bPtr->columnCount);
 261     memcpy(clist, bPtr->columns, sizeof(WMList*)*bPtr->columnCount);
 262     memcpy(tlist, bPtr->titles, sizeof(char*)*bPtr->columnCount);
 263     free(bPtr->titles);
 264     free(bPtr->columns);
 265     bPtr->titles = tlist;
 266     bPtr->columns = clist;
 267 }
 268
 269
 270
 271 WMListItem*
 272 WMGetBrowserSelectedItemInColumn(WMBrowser *bPtr, int column)
 273 {
 274     if ((column < 0) || (column > bPtr->columnCount))
 275         return NULL;
 276
 277     return WMGetListSelectedItem(bPtr->columns[column]);
 278 }
 279
 280
 281
 282 int
 283 WMGetBrowserSelectedColumn(WMBrowser *bPtr)
 284 {
 285     return bPtr->selectedColumn;
 286 }
 287
 288
 289 int
 290 WMGetBrowserSelectedRowInColumn(WMBrowser *bPtr, int column)
 291 {
 292     if (column >= 0 && column < bPtr->columnCount) {
 293         return WMGetListSelectedItemRow(bPtr->columns[column]);
 294     } else {
 295         return -1;
 296     }
 297 }
 298
 299
 300 void
 301 WMSetBrowserTitled(WMBrowser *bPtr, Bool flag)
 302 {
 303     int i;
 304     int columnX, columnY;
 305
 306     if (bPtr->flags.isTitled == flag)
 307         return;
 308
 309     columnX = 0;
 310
 311     if (!bPtr->flags.isTitled) {
 312         columnY = TITLE_SPACING + bPtr->titleHeight;
 313
 314         bPtr->columnSize.height -= columnY;
 315
 316         for (i=0; i<bPtr->columnCount; i++) {
 317             WMResizeWidget(bPtr->columns[i], bPtr->columnSize.width,
 318                            bPtr->columnSize.height);
 319
 320             columnX = WMWidgetView(bPtr->columns[i])->pos.x;
 321
 322             WMMoveWidget(bPtr->columns[i], columnX, columnY);
 323         }
 324     } else {
 325         bPtr->columnSize.height += TITLE_SPACING + bPtr->titleHeight;
 326
 327         for (i=0; i<bPtr->columnCount; i++) {
 328             WMResizeWidget(bPtr->columns[i], bPtr->columnSize.width,
 329                            bPtr->columnSize.height);
 330
 331             columnX = WMWidgetView(bPtr->columns[i])->pos.x;
 332
 333             WMMoveWidget(bPtr->columns[i], columnX, 0);
 334         }
 335     }
 336
 337     bPtr->flags.isTitled = flag;
 338 }
 339
 340
 341 WMListItem*
 342 WMAddSortedBrowserItem(WMBrowser *bPtr, int column, char *text, Bool isBranch)
 343 {
 344     WMListItem *item;
 345
 346     if (column < 0 || column >= bPtr->columnCount)
 347         return NULL;
 348
 349     item = WMAddSortedListItem(bPtr->columns[column], text);
 350     item->isBranch = isBranch;
 351
 352     return item;
 353 }
 354
 355
 356
 357 WMListItem*
 358 WMInsertBrowserItem(WMBrowser *bPtr, int column, int row, char *text,
 359                     Bool isBranch)
 360 {
 361     WMListItem *item;
 362
 363     if (column < 0 || column >= bPtr->columnCount)
 364         return NULL;
 365
 366     item = WMInsertListItem(bPtr->columns[column], row, text);
 367     item->isBranch = isBranch;
 368
 369     return item;
 370 }
 371
 372
 373
 374
 375 static void
 376 resizeBrowser(WMWidget *w, unsigned int width, unsigned int height)
 377 {
 378     WMBrowser *bPtr = (WMBrowser*)w;
 379     int cols = bPtr->maxVisibleColumns;
 380     int colX, colY;
 381     int i;
 382
 383     assert(width > 0);
 384     assert(height > 0);
 385
 386     bPtr->columnSize.width = (width-(cols-1)*COLUMN_SPACING) / cols;
 387     bPtr->columnSize.height = height;
 388
 389     if (bPtr->flags.isTitled) {
 390         bPtr->columnSize.height -= TITLE_SPACING + bPtr->titleHeight;
 391         colY = TITLE_SPACING + bPtr->titleHeight;
 392     } else {
 393         colY = 0;
 394     }
 395
 396     if (bPtr->flags.hasScroller) {
 397         bPtr->columnSize.height -= SCROLLER_WIDTH + 4;
 398
 399         if (bPtr->scroller) {
 400             WMResizeWidget(bPtr->scroller, width-2, 1);
 401             WMMoveWidget(bPtr->scroller, 1, height-SCROLLER_WIDTH-1);
 402         }
 403     }
 404
 405     colX = 0;
 406     for (i = 0; i < bPtr->columnCount; i++) {
 407         WMResizeWidget(bPtr->columns[i], bPtr->columnSize.width,
 408                        bPtr->columnSize.height);
 409
 410         WMMoveWidget(bPtr->columns[i], colX, colY);
 411
 412         if (COLUMN_IS_VISIBLE(bPtr, i)) {
 413             colX += bPtr->columnSize.width+COLUMN_SPACING;
 414         }
 415     }
 416
 417     W_ResizeView(bPtr->view, width, height);
 418 }
 419
 420
 421 static void
 422 paintItem(WMList *lPtr, Drawable d, char *text, int state, WMRect *rect)
 423 {
 424     WMView *view = W_VIEW(lPtr);
 425     W_Screen *scr = view->screen;
 426     int width, height, x, y;
 427
 428     width = rect->size.width;
 429     height = rect->size.height;
 430     x = rect->pos.x;
 431     y = rect->pos.y;
 432
 433     if (state & WLDSSelected)
 434         XFillRectangle(scr->display, d, W_GC(scr->white), x, y,
 435                        width, height);
 436     else
 437         XClearArea(scr->display, d, x, y, width, height, False);
 438
 439     W_PaintText(view, d, scr->normalFont,  x+4, y, width,
 440                 WALeft, W_GC(scr->black), False, text, strlen(text));
 441
 442     if (state & WLDSIsBranch) {
 443         XDrawLine(scr->display, d, W_GC(scr->darkGray), x+width-11, y+3,
 444                   x+width-6, y+height/2);
 445         if (state & WLDSSelected)
 446             XDrawLine(scr->display, d,W_GC(scr->gray), x+width-11, y+height-5,
 447                       x+width-6, y+height/2);
 448         else
 449             XDrawLine(scr->display, d,W_GC(scr->white), x+width-11, y+height-5,
 450                       x+width-6, y+height/2);
 451         XDrawLine(scr->display, d, W_GC(scr->black), x+width-12, y+3,
 452                   x+width-12, y+height-5);
 453     }
 454 }
 455
 456
 457 static void
 458 scrollCallback(WMWidget *scroller, void *self)
 459 {
 460     WMBrowser *bPtr = (WMBrowser*)self;
 461     WMScroller *sPtr = (WMScroller*)scroller;
 462     int newFirst;
 463 #define LAST_VISIBLE_COLUMN  bPtr->firstVisibleColumn+bPtr->maxVisibleColumns
 464
 465     switch (WMGetScrollerHitPart(sPtr)) {
 466      case WSDecrementLine:
 467         if (bPtr->firstVisibleColumn > 0) {
 468             scrollToColumn(bPtr, bPtr->firstVisibleColumn-1);
 469         }
 470         break;
 471
 472      case WSDecrementPage:
 473         if (bPtr->firstVisibleColumn > 0) {
 474             newFirst = bPtr->firstVisibleColumn - bPtr->maxVisibleColumns;
 475
 476             scrollToColumn(bPtr, newFirst);
 477         }
 478         break;
 479
 480
 481      case WSIncrementLine:
 482         if (LAST_VISIBLE_COLUMN < bPtr->columnCount) {
 483             scrollToColumn(bPtr, bPtr->firstVisibleColumn+1);
 484         }
 485         break;
 486
 487      case WSIncrementPage:
 488         if (LAST_VISIBLE_COLUMN < bPtr->columnCount) {
 489             newFirst = bPtr->firstVisibleColumn + bPtr->maxVisibleColumns;
 490
 491             if (newFirst+bPtr->maxVisibleColumns >= bPtr->columnCount)
 492                 newFirst = bPtr->columnCount - bPtr->maxVisibleColumns;
 493
 494             scrollToColumn(bPtr, newFirst);
 495         }
 496         break;
 497
 498      case WSKnob:
 499         {
 500             float floatValue;
 501             float value = bPtr->columnCount - bPtr->maxVisibleColumns;
 502
 503             floatValue = WMGetScrollerValue(bPtr->scroller);
 504
 505             floatValue = (floatValue*value)/value;
 506
 507             newFirst = floatValue*(float)(bPtr->columnCount - bPtr->maxVisibleColumns);
 508
 509             if (bPtr->firstVisibleColumn != newFirst)
 510                 scrollToColumn(bPtr, newFirst);
 511             else
 512                 WMSetScrollerParameters(bPtr->scroller, floatValue,
 513                                         bPtr->maxVisibleColumns/(float)bPtr->columnCount);
 514
 515         }
 516         break;
 517
 518      case WSKnobSlot:
 519      case WSNoPart:
 520         /* do nothing */
 521         break;
 522     }
 523 #undef LAST_VISIBLE_COLUMN
 524 }
 525
 526
 527 static void
 528 setupScroller(WMBrowser *bPtr)
 529 {
 530     WMScroller *sPtr;
 531     int y;
 532
 533     y = bPtr->view->size.height - SCROLLER_WIDTH - 1;
 534
 535     sPtr = WMCreateScroller(bPtr);
 536     WMSetScrollerAction(sPtr, scrollCallback, bPtr);
 537     WMMoveWidget(sPtr, 1, y);
 538     WMResizeWidget(sPtr, bPtr->view->size.width-2, SCROLLER_WIDTH);
 539
 540     bPtr->scroller = sPtr;
 541
 542     WMMapWidget(sPtr);
 543 }
 544
 545
 546 void
 547 WMSetBrowserAction(WMBrowser *bPtr, WMAction *action, void *clientData)
 548 {
 549     bPtr->action = action;
 550     bPtr->clientData = clientData;
 551 }
 552
 553
 554 void
 555 WMSetBrowserHasScroller(WMBrowser *bPtr, int hasScroller)
 556 {
 557     bPtr->flags.hasScroller = hasScroller;
 558 }
 559
 560
 561
 562 Bool
 563 WMSetBrowserPath(WMBrowser *bPtr, char *path)
 564 {
 565     int i;
 566     char *str = wstrdup(path);
 567     char *tmp;
 568     int item;
 569     Bool ok = True;
 570     WMListItem *listItem;
 571
 572     removeColumn(bPtr, 1);
 573
 574     i = 0;
 575     tmp = strtok(str, bPtr->pathSeparator);
 576     while (tmp) {
 577         /* select it in the column */
 578         item = WMFindRowOfListItemWithTitle(bPtr->columns[i], tmp);
 579         if (item<0) {
 580             ok = False;
 581             break;
 582         }
 583         WMSelectListItem(bPtr->columns[i], item);
 584         WMSetListPosition(bPtr->columns[i], item);
 585
 586         listItem = WMGetListItem(bPtr->columns[i], item);
 587         if (!listItem || !listItem->isBranch) {
 588             break;
 589         }
 590
 591         /* load next column */
 592         WMAddBrowserColumn(bPtr);
 593
 594         loadColumn(bPtr, i+1);
 595
 596         tmp = strtok(NULL, bPtr->pathSeparator);
 597
 598         i++;
 599     }
 600     free(str);
 601
 602     bPtr->selectedColumn = bPtr->usedColumnCount - 1;
 603
 604     scrollToColumn(bPtr, bPtr->columnCount-bPtr->maxVisibleColumns);
 605
 606     return ok;
 607 }
 608
 609
 610 char*
 611 WMGetBrowserPath(WMBrowser *bPtr)
 612 {
 613     return WMGetBrowserPathToColumn(bPtr, bPtr->columnCount);
 614 }
 615
 616
 617 char*
 618 WMGetBrowserPathToColumn(WMBrowser *bPtr, int column)
 619 {
 620     int i, size;
 621     char *path;
 622     WMListItem *item;
 623
 624     if (column >= bPtr->usedColumnCount)
 625         column = bPtr->usedColumnCount-1;
 626
 627     /* calculate size of buffer */
 628     size = 0;
 629     for (i = 0; i <= column; i++) {
 630         item = WMGetListSelectedItem(bPtr->columns[i]);
 631         if (!item)
 632             break;
 633         size += strlen(item->text);
 634     }
 635
 636     /* get the path */
 637     path = wmalloc(size+(column+1)*strlen(bPtr->pathSeparator)+1);
 638     /* ignore first / */
 639     *path = 0;
 640     for (i = 0; i <= column; i++) {
 641         strcat(path, bPtr->pathSeparator);
 642         item = WMGetListSelectedItem(bPtr->columns[i]);
 643         if (!item)
 644             break;
 645         strcat(path, item->text);
 646     }
 647
 648     return path;
 649 }
 650
 651
 652 static void
 653 loadColumn(WMBrowser *bPtr, int column)
 654 {
 655     assert(bPtr->fillColumn);
 656
 657     bPtr->flags.loadingColumn = 1;
 658     (*bPtr->fillColumn)(bPtr, column);
 659     bPtr->flags.loadingColumn = 0;
 660 }
 661
 662
 663 static void
 664 paintBrowser(WMBrowser *bPtr)
 665 {
 666     int i;
 667
 668     if (!bPtr->view->flags.mapped)
 669         return;
 670
 671     W_DrawRelief(bPtr->view->screen, bPtr->view->window, 0,
 672                  bPtr->view->size.height-SCROLLER_WIDTH-2,
 673                  bPtr->view->size.width, 22, WRSunken);
 674
 675     if (bPtr->flags.isTitled) {
 676         for (i=0; i<bPtr->maxVisibleColumns; i++) {
 677             drawTitleOfColumn(bPtr, i+bPtr->firstVisibleColumn);
 678         }
 679     }
 680 }
 681
 682
 683 static void
 684 handleEvents(XEvent *event, void *data)
 685 {
 686     WMBrowser *bPtr = (WMBrowser*)data;
 687
 688     CHECK_CLASS(data, WC_Browser);
 689
 690
 691     switch (event->type) {
 692      case Expose:
 693         paintBrowser(bPtr);
 694         break;
 695
 696      case DestroyNotify:
 697         destroyBrowser(bPtr);
 698         break;
 699
 700     }
 701 }
 702
 703
 704
 705 static void
 706 scrollToColumn(WMBrowser *bPtr, int column)
 707 {
 708     int i;
 709     int x;
 710     int notify = 0;
 711
 712
 713     if (column != bPtr->firstVisibleColumn)
 714         notify = 1;
 715
 716     if (column < 0)
 717         column = 0;
 718
 719     x = 0;
 720     bPtr->firstVisibleColumn = column;
 721     for (i = 0; i < bPtr->usedColumnCount; i++) {
 722         if (COLUMN_IS_VISIBLE(bPtr, i)) {
 723             WMMoveWidget(bPtr->columns[i], x,
 724                          WMWidgetView(bPtr->columns[i])->pos.y);
 725             if (!WMWidgetView(bPtr->columns[i])->flags.realized)
 726                 WMRealizeWidget(bPtr->columns[i]);
 727             WMMapWidget(bPtr->columns[i]);
 728             x += bPtr->columnSize.width+COLUMN_SPACING;
 729         } else {
 730             WMUnmapWidget(bPtr->columns[i]);
 731         }
 732     }
 733
 734     /* update the scroller */
 735     if (bPtr->columnCount > bPtr->maxVisibleColumns) {
 736         float value, proportion;
 737
 738         value = bPtr->firstVisibleColumn
 739             /(float)(bPtr->columnCount-bPtr->maxVisibleColumns);
 740         proportion = bPtr->maxVisibleColumns/(float)bPtr->columnCount;
 741         WMSetScrollerParameters(bPtr->scroller, value, proportion);
 742     } else {
 743         WMSetScrollerParameters(bPtr->scroller, 0, 1);
 744     }
 745
 746     if (bPtr->view->flags.mapped)
 747         paintBrowser(bPtr);
 748
 749     if (notify)
 750         WMPostNotificationName(WMBrowserDidScrollNotification, bPtr, NULL);
 751 }
 752
 753
 754 static void
 755 listCallback(void *self, void *clientData)
 756 {
 757     WMBrowser *bPtr = (WMBrowser*)clientData;
 758     WMList *lPtr = (WMList*)self;
 759     WMListItem *item;
 760     int i;
 761
 762     item = WMGetListSelectedItem(lPtr);
 763     if (!item)
 764         return;
 765
 766     for (i=0; i<bPtr->columnCount; i++) {
 767         if (lPtr == bPtr->columns[i])
 768             break;
 769     }
 770     assert(i<bPtr->columnCount);
 771
 772     bPtr->selectedColumn = i;
 773
 774     /* columns at right must be cleared */
 775     removeColumn(bPtr, i+1);
 776     /* open directory */
 777     if (item->isBranch) {
 778         WMAddBrowserColumn(bPtr);
 779         loadColumn(bPtr, bPtr->usedColumnCount-1);
 780     }
 781     if (bPtr->usedColumnCount < bPtr->maxVisibleColumns)
 782         i = 0;
 783     else
 784         i = bPtr->usedColumnCount-bPtr->maxVisibleColumns;
 785     scrollToColumn(bPtr, i);
 786
 787     /* call callback for click */
 788     if (bPtr->action)
 789         (*bPtr->action)(bPtr, bPtr->clientData);
 790 }
 791
 792
 793 void
 794 WMLoadBrowserColumnZero(WMBrowser *bPtr)
 795 {
 796     if (!bPtr->flags.loaded) {
 797         /* create column 0 */
 798         WMAddBrowserColumn(bPtr);
 799
 800         loadColumn(bPtr, 0);
 801
 802         /* make column 0 visible */
 803         scrollToColumn(bPtr, 0);
 804
 805         bPtr->flags.loaded = 1;
 806     }
 807 }
 808
 809
 810 void
 811 WMRemoveBrowserItem(WMBrowser *bPtr, int column, int row)
 812 {
 813     WMList *list;
 814
 815     if (column < 0 || column >= bPtr->usedColumnCount)
 816         return;
 817
 818     list = WMGetBrowserListInColumn(bPtr, column);
 819
 820     if (row < 0 || row >= WMGetListNumberOfRows(list))
 821         return;
 822
 823     removeColumn(bPtr, column+1);
 824     if (bPtr->usedColumnCount < bPtr->maxVisibleColumns)
 825         scrollToColumn(bPtr, 0);
 826     else
 827         scrollToColumn(bPtr, bPtr->usedColumnCount-bPtr->maxVisibleColumns);
 828
 829     WMRemoveListItem(list, row);
 830 }
 831
 832
 833 int
 834 WMAddBrowserColumn(WMBrowser *bPtr)
 835 {
 836     WMList *list;
 837     WMList **clist;
 838     char **tlist;
 839     int colY;
 840     int index;
 841
 842
 843     if (bPtr->usedColumnCount < bPtr->columnCount) {
 844         return bPtr->usedColumnCount++;
 845     }
 846
 847     bPtr->usedColumnCount++;
 848
 849     if (bPtr->flags.isTitled) {
 850         colY = TITLE_SPACING + bPtr->titleHeight;
 851     } else {
 852         colY = 0;
 853     }
 854
 855     index = bPtr->columnCount;
 856     bPtr->columnCount++;
 857     clist = wmalloc(sizeof(WMList*)*bPtr->columnCount);
 858     tlist = wmalloc(sizeof(char*)*bPtr->columnCount);
 859     memcpy(clist, bPtr->columns, sizeof(WMList*)*(bPtr->columnCount-1));
 860     memcpy(tlist, bPtr->titles, sizeof(char*)*(bPtr->columnCount-1));
 861     if (bPtr->columns)
 862         free(bPtr->columns);
 863     if (bPtr->titles)
 864         free(bPtr->titles);
 865     bPtr->columns = clist;
 866     bPtr->titles = tlist;
 867
 868     bPtr->titles[index] = NULL;
 869
 870     list = WMCreateList(bPtr);
 871     WMSetListAction(list, listCallback, bPtr);
 872     WMSetListUserDrawProc(list, paintItem);
 873     bPtr->columns[index] = list;
 874
 875     WMResizeWidget(list, bPtr->columnSize.width, bPtr->columnSize.height);
 876     WMMoveWidget(list, (bPtr->columnSize.width+COLUMN_SPACING)*index, colY);
 877     if (COLUMN_IS_VISIBLE(bPtr, index))
 878         WMMapWidget(list);
 879
 880     /* update the scroller */
 881     if (bPtr->columnCount > bPtr->maxVisibleColumns) {
 882         float value, proportion;
 883
 884         value = bPtr->firstVisibleColumn
 885             /(float)(bPtr->columnCount-bPtr->maxVisibleColumns);
 886         proportion = bPtr->maxVisibleColumns/(float)bPtr->columnCount;
 887         WMSetScrollerParameters(bPtr->scroller, value, proportion);
 888     }
 889
 890     return index;
 891 }
 892
 893
 894
 895 static void
 896 destroyBrowser(WMBrowser *bPtr)
 897 {
 898     int i;
 899
 900     for (i=0; i<bPtr->columnCount; i++) {
 901         if (bPtr->titles[i])
 902             free(bPtr->titles[i]);
 903     }
 904     free(bPtr->titles);
 905
 906     free(bPtr->pathSeparator);
 907
 908     free(bPtr);
 909 }
 910
 911