contrib/src/fl/rowlayoutpl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        rowlayoutpl.cpp
   3 // Purpose:     cbRowLayoutPlugin implementation.
   4 // Author:      Aleksandras Gluchovas
   5 // Modified by:
   6 // Created:     09/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Aleksandras Gluchovas
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13     #pragma implementation "rowlayoutpl.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/wx.h"
  25 #endif
  26
  27 #include "wx/fl/rowlayoutpl.h"
  28
  29 // exerimental "features" are still buggy
  30 #undef __EXPERIMENTAL
  31
  32 /***** Implementation for class cbRowLayoutPlugin *****/
  33
  34 IMPLEMENT_DYNAMIC_CLASS( cbRowLayoutPlugin, cbPluginBase )
  35
  36 BEGIN_EVENT_TABLE( cbRowLayoutPlugin, cbPluginBase )
  37
  38     EVT_PL_LAYOUT_ROW ( cbRowLayoutPlugin::OnLayoutRow  )
  39     EVT_PL_LAYOUT_ROWS( cbRowLayoutPlugin::OnLayoutRows )
  40     EVT_PL_RESIZE_ROW ( cbRowLayoutPlugin::OnResizeRow  )
  41
  42     EVT_PL_INSERT_BAR ( cbRowLayoutPlugin::OnInsertBar  )
  43     EVT_PL_REMOVE_BAR ( cbRowLayoutPlugin::OnRemoveBar  )
  44
  45 END_EVENT_TABLE()
  46
  47 cbRowLayoutPlugin::cbRowLayoutPlugin(void)
  48     : mpPane( 0 )
  49 {}
  50
  51 cbRowLayoutPlugin::cbRowLayoutPlugin( wxFrameLayout* pPanel, int paneMask )
  52
  53     : cbPluginBase( pPanel, paneMask ),
  54       mpPane( 0 )
  55 {}
  56
  57 void cbRowLayoutPlugin::CheckIfAtTheBoundary( cbBarInfo* pTheBar, cbRowInfo& rowInfo )
  58 {
  59     // this method handles situation, when fixed bar is inserted
  60     // into the row, where among fixed bars not-fixed ones are present.
  61     // In this case we need to check if the pBarNode appears to be inserted
  62     // chain of fixed-bars on the very right or left side of the row,
  63     // then all the white-space, such chain should be eliminated,
  64     // and the resulting chain justified to the right or the left
  65     // side of the row
  66
  67     if ( !pTheBar->IsFixed() || rowInfo.mHasOnlyFixedBars )
  68
  69         return;
  70
  71     cbBarInfo* pBar = rowInfo.mBars[ rowInfo.mBars.Count() - 1 ];
  72
  73     // slide fixed bars to the right on the right side relative to the pBarNode
  74
  75     int prevX = mpPane->mPaneWidth;
  76
  77     do
  78     {
  79         if ( !pBar->IsFixed() )
  80             break;
  81
  82         wxRect& bounds = pBar->mBounds;
  83
  84         bounds.x = prevX - bounds.width;
  85
  86         prevX = bounds.x;
  87
  88         if ( pBar == pTheBar ) break;
  89
  90         pBar = pBar->mpPrev;
  91     }
  92     while( 1 );
  93
  94     // slide fixed bars to the left on the left side relative to the pBarNode
  95
  96     pBar = rowInfo.mBars[0];
  97
  98     prevX = 0;
  99
 100     do
 101     {
 102         if ( pBar->IsFixed() )
 103
 104             break;
 105
 106         wxRect& bounds = pBar->mBounds;
 107
 108         bounds.x = prevX;
 109
 110         prevX = bounds.x + bounds.width;
 111
 112         if ( pBar == pTheBar ) break;
 113
 114         pBar = pBar->mpNext;
 115     }
 116     while( 1 );
 117 }
 118
 119 void cbRowLayoutPlugin::ExpandNotFixedBars( cbRowInfo* pRow )
 120 {
 121     ApplyLengthRatios( pRow );
 122
 123    // FIXME:: something's wrong?
 124    return;
 125
 126     double freeSpc = (double)GetRowFreeSpace( pRow );
 127
 128     // calculate sum of precents
 129
 130     double pcntSum = 0.0;
 131
 132     size_t i;
 133     for ( i = 0; i != pRow->mBars.Count(); ++i )
 134     {
 135         if ( !pRow->mBars[i]->IsFixed() )
 136             pcntSum += pRow->mBars[i]->mLenRatio;
 137     }
 138
 139     // setup bar lengths
 140
 141     int curX = 0;
 142
 143     for ( i = 0; i != pRow->mBars.Count(); ++i )
 144     {
 145         cbBarInfo& bar = *pRow->mBars[i];
 146
 147         if ( !bar.IsFixed() )
 148         {
 149             bar.mLenRatio = bar.mLenRatio/(pcntSum);
 150
 151             bar.mBounds.width =
 152
 153                 wxMax( mpPane->mProps.mMinCBarDim.x, int( freeSpc*bar.mLenRatio ) );
 154         }
 155
 156         bar.mBounds.x = curX;
 157         curX = bar.mBounds.x + bar.mBounds.width;
 158     }
 159 }
 160
 161 void cbRowLayoutPlugin::AdjustLengthOfInserted( cbRowInfo* pRow, cbBarInfo* pTheBar )
 162 {
 163     return;  // TBD: Makes following code unreachable
 164
 165     // pTheBar is not-fixed
 166
 167
 168     // FIXME:: what is this for??
 169
 170 #if 1
 171
 172     int totalLen = 0;
 173
 174     size_t i;
 175     for ( i = 0; i != pRow->mBars.Count(); ++i )
 176     {
 177         if ( !pRow->mBars[i]->IsFixed() )
 178             totalLen += pRow->mBars[i]->mBounds.width;
 179     }
 180
 181     double curWidth = pTheBar->mBounds.width;
 182
 183     if ( pRow->mBars.Count() )
 184
 185         pTheBar->mBounds.width = int( mpPane->mPaneWidth * (curWidth / double(totalLen)) );
 186 #else
 187
 188     double freeSpc = (double)GetRowFreeSpace( pRow );
 189
 190     double pcntSum = 0.0;
 191
 192    size_t i;
 193     for ( i = 0; i != pRow->mBars.Count(); ++i )
 194    {
 195         if ( !pRow->mBars[i]->IsFixed() )
 196             pcntSum += pRow->mBars[i]->mLenRatio;
 197    }
 198
 199     // if no longer "balanced", assume that `pTheBar' was previously
 200     // removed from this row (kind of AI...)
 201
 202     if ( pcntSum < 0.98 )
 203
 204         pTheBar->mBounds.width = freeSpc * (1.0 - pcntSum);
 205 #endif
 206 }
 207
 208 void cbRowLayoutPlugin::FitBarsToRange( int from, int till,
 209                                         cbBarInfo* pTheBar, cbRowInfo* pRow )
 210 {
 211     cbBarInfo* pFromBar = NULL;
 212     cbBarInfo* pTillBar = NULL;
 213
 214     if ( pTheBar->mBounds.x > from )
 215     {
 216         // it's range from the left
 217         pFromBar = pRow->mBars[0];
 218         pTillBar = pTheBar;
 219     }
 220     else
 221     {
 222         pFromBar = pTheBar->mpNext;
 223         pTillBar = NULL;
 224     }
 225
 226     // calc free space in the range
 227
 228     cbBarInfo* pBar = pFromBar;
 229     int     freeSpc = till-from;
 230     double  pcntSum = 0;
 231
 232     while( pBar != pTillBar )
 233     {
 234         if ( pBar->IsFixed() )
 235             freeSpc -= pBar->mBounds.width;
 236         else
 237             pcntSum += pBar->mLenRatio;
 238
 239         pBar = pBar->mpNext;
 240     }
 241
 242     // adjust not-fixed bar sizes in the range
 243
 244     pBar = pFromBar;
 245
 246     while ( pBar != pTillBar )
 247     {
 248         if ( !pBar->IsFixed() )
 249       {
 250             pBar->mBounds.width =
 251                 wxMax( mpPane->mProps.mMinCBarDim.x,
 252                        int( double(freeSpc) * (pBar->mLenRatio/pcntSum) )
 253                      );
 254       }
 255         pBar = pBar->mpNext;
 256     }
 257
 258     // layout range, starting from the left-most bar
 259
 260     pBar      = pFromBar;
 261     int prevX = from;
 262     bool hasNotFixedBars = FALSE;
 263
 264     while ( pBar != pTillBar )
 265     {
 266         wxRect& bounds = pBar->mBounds;
 267
 268         if ( !pBar->IsFixed() )
 269         {
 270             hasNotFixedBars = TRUE;
 271
 272             freeSpc -= bounds.width;
 273         }
 274
 275         bounds.x = prevX;
 276
 277         prevX = bounds.x + bounds.width;
 278
 279         pBar = pBar->mpNext;
 280     }
 281
 282     // make width adjustment for the right-most bar in the range, due to
 283     // lost precision when seting widths using f.p. length-ratios
 284
 285     if ( hasNotFixedBars )
 286     {
 287         if ( pTheBar->mBounds.x > from )
 288         {
 289             if ( pTillBar->mpPrev )
 290             {
 291                 wxRect& tillBar = pTillBar->mpPrev->mBounds;
 292
 293                 //tillBar.width = bar.mBounds.x - tillBar.x;
 294                 tillBar.width += freeSpc;
 295             }
 296         }
 297         else
 298         {
 299             cbBarInfo* pLast = pRow->mBars[ pRow->mBars.Count() - 1 ];
 300
 301             if ( pLast != pTheBar )
 302             {
 303                 pTheBar->mBounds.width += freeSpc;
 304
 305                 SlideRightSideBars( pTheBar );
 306             }
 307         }
 308     }
 309 }
 310
 311 void cbRowLayoutPlugin::MinimzeNotFixedBars( cbRowInfo* pRow, cbBarInfo* pBarToPreserve )
 312 {
 313     size_t i;
 314     for ( i = 0; i != pRow->mBars.Count(); ++i )
 315     {
 316         if ( !pRow->mBars[i]->IsFixed() && pRow->mBars[i] != pBarToPreserve )
 317             pRow->mBars[i]->mBounds.width = mpPane->mProps.mMinCBarDim.x;
 318     }
 319 }
 320
 321 int cbRowLayoutPlugin::GetRowFreeSpace( cbRowInfo* pRow )
 322 {
 323     int freeSpc = mpPane->mPaneWidth;
 324
 325     size_t i;
 326     for ( i = 0; i != pRow->mBars.Count(); ++i )
 327     {
 328         // not-fixed bars variable length, thus their
 329         // dimensions are ignored
 330         if ( pRow->mBars[i]->IsFixed() )
 331             freeSpc -= pRow->mBars[i]->mBounds.width;
 332     }
 333
 334     return freeSpc;
 335 }
 336
 337 void cbRowLayoutPlugin::RecalcLengthRatios( cbRowInfo* pRow )
 338 {
 339     double freeSpc = double( GetRowFreeSpace( pRow ) );
 340
 341     cbBarInfo* pBar          = pRow->mBars[0];
 342     cbBarInfo* pLastNotFixed = NULL;
 343
 344     double pcntLeft = 1.0; // (100%)
 345
 346 #ifdef __EXPERIMENTAL
 347
 348     int totalLen = 0;
 349
 350     size_t i;
 351     for ( i = 0; i != pRow->mBars.Count(); ++i )
 352     {
 353         if ( !pRow->mBars[i]->IsFixed() )
 354             totalLen += pRow->mBars[i]->mBounds.width;
 355     }
 356 #endif
 357
 358     size_t i;
 359     for ( i = 0; i != pRow->mBars.Count(); ++i )
 360     {
 361         cbBarInfo& bar = *pRow->mBars[i];
 362
 363         if ( !bar.IsFixed() )
 364         {
 365
 366 #ifdef __EXPERIMENTAL
 367
 368             bar.mLenRatio = double(bar.mBounds.width)/double(totalLen);
 369 #else
 370             bar.mLenRatio = double(bar.mBounds.width)/freeSpc;
 371 #endif
 372
 373             pcntLeft      -= bar.mLenRatio;
 374             pLastNotFixed  = pBar;
 375         }
 376     }
 377
 378     // attach remainder (the result of lost precision) to the
 379     // last not-fixed bar
 380
 381 #if !defined(__EXPERIMENTAL)
 382
 383     if ( pLastNotFixed )
 384
 385         pLastNotFixed->mLenRatio += pcntLeft;
 386 #endif
 387
 388 }
 389
 390 void cbRowLayoutPlugin::ApplyLengthRatios( cbRowInfo* pRow )
 391 {
 392     double pcntSum = 0;
 393
 394     // FOR NOW:: all-in-one
 395
 396     size_t i = 0;
 397     for ( i = 0; i != pRow->mBars.Count(); ++i )
 398     {
 399         if ( !pRow->mBars[i]->IsFixed() )
 400             pcntSum += pRow->mBars[i]->mLenRatio;
 401     }
 402
 403     /*
 404     pBar = node_to_first_bar_node( pRow );
 405
 406     while( pBar )
 407     {
 408         cbBarInfo& bar = node_to_bar( pBar );
 409
 410         if ( !bar.IsFixed() )
 411
 412             bar.mLenRatio = pcntSum / bar.mLenRatio;
 413
 414         pBar = pBar->Next();
 415     }
 416     */
 417
 418     int    prevX   = 0;
 419     double freeSpc = GetRowFreeSpace( pRow );
 420
 421     // tricky stuff (improtant!):
 422     // when not-fixed bar is removed from the row and there are
 423     // still some other not-fixed ones left in that row, then
 424     // the sum of mLenRatio's is no longer 1.0 - this is left
 425     // intintionally to handle the case when the removed bar
 426     // is returned right back to the row - so that it would retain
 427     // it's original dimensions in this row (this is kind of AI...)
 428     //
 429     // The problem is - when it's remvoed, the sum of
 430     // mLenRatio's is not in "balance", i.e. is < 1.0,
 431     // it's possible to restore balance, but instead of that
 432     // we artifically ajdust freeSpc value in a way that it would
 433     // look like total of mLetRatio's is 1.0, thus original
 434     // len. ratios are _preserved_:
 435
 436     double unit = freeSpc / pcntSum;
 437
 438     bool haveSquished = FALSE;
 439
 440     for ( i = 0; i != pRow->mBars.Count(); ++i )
 441     {
 442         if ( !pRow->mBars[i]->IsFixed() )
 443         {
 444             cbBarInfo& bar = *pRow->mBars[i];
 445
 446             if ( int( unit * bar.mLenRatio ) < mpPane->mProps.mMinCBarDim.x )
 447             {
 448                 haveSquished = TRUE;
 449
 450                 bar.mBounds.width = -1; // mark as "squished"
 451
 452                 pcntSum -= bar.mLenRatio;
 453
 454                 freeSpc -= mpPane->mProps.mMinCBarDim.x;
 455             }
 456         }
 457     }  // for
 458
 459     if ( haveSquished )
 460         unit = freeSpc / pcntSum;
 461
 462     for ( i = 0; i != pRow->mBars.Count(); ++i )
 463     {
 464         cbBarInfo& bar = *pRow->mBars[i];
 465
 466         bar.mBounds.x = prevX;
 467
 468         if ( !bar.IsFixed() )
 469         {
 470             if ( bar.mBounds.width == -1 )
 471
 472                 bar.mBounds.width = mpPane->mProps.mMinCBarDim.x;
 473             else
 474                 bar.mBounds.width = int( unit * bar.mLenRatio );
 475
 476             // a little bit of AI:
 477             // memorize bar's height and width, when docked in
 478             // the current orientation - by making the current
 479             // dimensions to be "preffered" ones for this docking state
 480
 481             if ( !bar.IsFixed() )
 482             {
 483                 bar.mDimInfo.mSizes[ bar.mState ].x = bar.mBounds.width;
 484                 bar.mDimInfo.mSizes[ bar.mState ].y = bar.mBounds.height;
 485             }
 486         }
 487
 488         prevX = bar.mBounds.x + bar.mBounds.width;
 489     }
 490 }
 491
 492 void cbRowLayoutPlugin::DetectBarHandles( cbRowInfo* pRow )
 493 {
 494     // first pass from left to right (detect left-side handles)
 495
 496     bool foundNotFixed = FALSE;
 497
 498     size_t i;
 499     for ( i = 0; i != pRow->mBars.Count(); ++i )
 500     {
 501         cbBarInfo& bar = *pRow->mBars[i];
 502
 503         bar.mHasLeftHandle = FALSE;
 504
 505         if ( !bar.IsFixed() )
 506         {
 507             if ( foundNotFixed )
 508
 509                 if ( bar.mpPrev &&
 510                      bar.mpPrev->IsFixed() )
 511
 512                     bar.mHasLeftHandle = TRUE;
 513
 514             foundNotFixed = TRUE;
 515         }
 516     }
 517
 518     // pass from right to left (detect right-side handles)
 519
 520     foundNotFixed = FALSE;
 521
 522     cbBarInfo* pBar = pRow->mBars[ pRow->mBars.Count() - 1 ];
 523
 524     while( pBar )
 525     {
 526         pBar->mHasRightHandle = FALSE;
 527
 528         if ( !pBar->IsFixed() )
 529         {
 530             if ( foundNotFixed )
 531
 532                 if ( pBar->mpNext )
 533
 534                      pBar->mHasRightHandle = TRUE;
 535
 536             foundNotFixed = TRUE;
 537         }
 538
 539         pBar = pBar->mpPrev;
 540     }
 541 }
 542
 543 void cbRowLayoutPlugin::RelayoutNotFixedBarsAround( cbBarInfo* pTheBar, cbRowInfo* pRow )
 544 {
 545     if ( !pTheBar->mpPrev )
 546     {
 547         if (  !pTheBar->IsFixed() )
 548         {
 549             // this bar the first in the row, move it's
 550             // left edge to the very left
 551             pTheBar->mBounds.width += pTheBar->mBounds.x;
 552             pTheBar->mBounds.x      = 0;
 553         }
 554     }
 555     else
 556         FitBarsToRange( 0, pTheBar->mBounds.x, pTheBar, pRow );
 557
 558     if ( !pTheBar->mpNext )
 559     {
 560         if ( !pTheBar->IsFixed() )
 561         {
 562             // this bar is the last one, move it's
 563             // right edge to the very right
 564
 565             pTheBar->mBounds.width = mpPane->mPaneWidth - pTheBar->mBounds.x;
 566         }
 567     }
 568     else
 569         FitBarsToRange( pTheBar->mBounds.x + pTheBar->mBounds.width, mpPane->mPaneWidth,
 570                         pTheBar, pRow
 571                       );
 572 }
 573
 574 void cbRowLayoutPlugin::LayoutItemsVertically( cbRowInfo& row )
 575 {
 576     size_t i;
 577     for ( i = 0; i != row.mBars.Count(); ++i )
 578     {
 579         cbBarInfo& bar = *row.mBars[i];
 580
 581         bar.mBounds.y = row.mRowY;
 582
 583         if ( !bar.IsFixed() )
 584
 585             // make all not-fixed bars of equal height
 586             bar.mBounds.height = row.mRowHeight;
 587
 588         if ( row.mHasUpperHandle )
 589
 590             bar.mBounds.y += mpPane->mProps.mResizeHandleSize;
 591     }
 592 }
 593
 594 int cbRowLayoutPlugin::CalcRowHeight( cbRowInfo& row )
 595 {
 596     int maxHeight = 0;
 597
 598     size_t i;
 599     for ( i = 0; i != row.mBars.Count(); ++i )
 600
 601         maxHeight = wxMax( maxHeight, row.mBars[i]->mBounds.height );
 602
 603     return maxHeight;
 604 }
 605
 606 void cbRowLayoutPlugin::StickRightSideBars( cbBarInfo* pToBar )
 607 {
 608     cbBarInfo* pBar  = pToBar->mpNext;
 609     cbBarInfo* pPrev = pToBar;
 610
 611     while( pBar )
 612     {
 613         wxRect& cur  = pBar->mBounds;
 614         wxRect& prev = pPrev->mBounds;
 615
 616         cur.x = prev.x + prev.width;
 617
 618         pPrev = pBar;
 619         pBar  = pBar->mpNext;
 620     }
 621 }
 622
 623 void cbRowLayoutPlugin::SlideLeftSideBars( cbBarInfo* pTheBar )
 624 {
 625     // shift left-side-bars to the left (with respect to "theBar"),
 626     // so that they would not obscured by each other
 627
 628     cbBarInfo* pBar  = pTheBar->mpPrev;
 629     cbBarInfo* pPrev = pTheBar;
 630
 631     while( pBar )
 632     {
 633         wxRect& cur  = pBar->mBounds;
 634         wxRect& prev = pPrev->mBounds;
 635
 636         if ( cur.x + cur.width > prev.x )
 637
 638             cur.x = prev.x - cur.width;
 639
 640         pPrev = pBar;
 641         pBar  = pBar->mpPrev;
 642     }
 643 }
 644
 645 void cbRowLayoutPlugin::SlideRightSideBars( cbBarInfo* pTheBar )
 646 {
 647     // shift right-side-bars to the right (with respect to "theBar"),
 648     // so that they would not be obscured by each other
 649
 650     cbBarInfo* pBar  = pTheBar->mpNext;
 651     cbBarInfo* pPrev = pTheBar;
 652
 653     while( pBar )
 654     {
 655         wxRect& cur  = pBar->mBounds;
 656         wxRect& prev = pPrev->mBounds;
 657
 658         if ( cur.x < prev.x + prev.width )
 659
 660             cur.x = prev.x + prev.width;
 661
 662         pPrev = pBar;
 663         pBar  = pBar->mpNext;
 664     }
 665 }
 666
 667 void cbRowLayoutPlugin::ShiftLeftTrashold( cbBarInfo* pTheBar, cbRowInfo& row )
 668 {
 669     wxRect& first = row.mBars[0]->mBounds;
 670
 671     if ( first.x < 0 )
 672     {
 673         row.mBars[0]->mBounds.x = 0;
 674
 675         SlideRightSideBars( row.mBars[0] );
 676     }
 677 }
 678
 679 void cbRowLayoutPlugin::ShiftRightTrashold( cbBarInfo* pTheBar, cbRowInfo& row )
 680 {
 681     wxRect& theBar = pTheBar->mBounds;
 682
 683     do
 684     {
 685         cbBarInfo* pBar = pTheBar;
 686
 687         // calculate free spece on the left side
 688
 689         int leftFreeSpc = 0;
 690
 691         while( pBar )
 692         {
 693             wxRect& cur = pBar->mBounds;
 694
 695             if ( pBar->mpPrev )
 696             {
 697                 wxRect& prev = pBar->mpPrev->mBounds;
 698
 699                 leftFreeSpc += cur.x - prev.x - prev.width;
 700             }
 701             else
 702                 leftFreeSpc += cur.x;
 703
 704             if ( cur.x < 0 )
 705             {
 706                 leftFreeSpc = 0;
 707                 break;
 708             }
 709
 710             pBar = pBar->mpPrev;
 711         }
 712
 713         pBar = pTheBar;
 714
 715         int rightOverflow = 0;
 716
 717         if ( pTheBar->IsFixed() )
 718
 719             while( pBar )
 720             {
 721                 if ( !pBar->mpNext )
 722                 {
 723                     wxRect& cur = pBar->mBounds;
 724
 725                     if ( cur.x + cur.width > mpPane->mPaneWidth )
 726
 727                         rightOverflow = cur.x + cur.width - mpPane->mPaneWidth;
 728                 }
 729
 730                 pBar = pBar->mpNext;
 731             }
 732
 733         if ( rightOverflow > 0 )
 734         {
 735             if ( leftFreeSpc <= 0 ) return;
 736
 737             if ( pTheBar->mpNext )
 738             {
 739                 wxRect& next = pTheBar->mpNext->mBounds;
 740
 741                 // if there's enough space on the left, move over one half-obscured
 742                 // bar from the right to the left side with respect to "theBar"
 743
 744                 if ( next.width < leftFreeSpc )
 745                 {
 746                     cbBarInfo* pNext = pTheBar->mpNext;
 747
 748                     row.mBars.Remove( pNext );
 749
 750                     row.mBars.Insert( pNext, row.mBars.Index( pTheBar ) );
 751
 752                     next.x = theBar.x - next.width;
 753
 754                     // re-setup mpPrev/mpNext references after insertion
 755
 756                     mpPane->InitLinksForRow( &row );
 757
 758                     // tighten things
 759
 760                     StickRightSideBars( pTheBar );
 761                     SlideLeftSideBars ( pTheBar );
 762
 763                     continue;
 764                 }
 765             }
 766
 767             int leftShift = ( rightOverflow > leftFreeSpc )
 768                             ? leftFreeSpc
 769                             : rightOverflow;
 770
 771             theBar.x -= leftShift;
 772
 773             StickRightSideBars( pTheBar );
 774             SlideLeftSideBars ( pTheBar );
 775
 776             break;
 777
 778         } // end of if ( rightOverflow )
 779         else
 780             break;
 781
 782     } while(1);
 783 }
 784
 785 void cbRowLayoutPlugin::InsertBefore( cbBarInfo* pBeforeBar,
 786                                       cbBarInfo* pTheBar,
 787                                       cbRowInfo& row        )
 788 {
 789     if ( pBeforeBar )
 790
 791         row.mBars.Insert( pTheBar, row.mBars.Index( pBeforeBar ) );
 792     else
 793         row.mBars.Add( pTheBar );
 794
 795     pTheBar->mpRow = &row;
 796 }
 797
 798 void cbRowLayoutPlugin::DoInsertBar( cbBarInfo* pTheBar, cbRowInfo& row )
 799 {
 800     wxRect& theBar = pTheBar->mBounds;
 801
 802     /* OLD STUFF::
 803     if ( theBar.x < 0 && !node_to_bar( pTheBar ).IsFixed() )
 804     {
 805         // AI::
 806         theBar.width += theBar.x;
 807         theBar.x = 0;
 808     } */
 809
 810     size_t i;
 811     for ( i = 0; i != row.mBars.Count(); ++i )
 812     {
 813         cbBarInfo& bar = *row.mBars[i];
 814
 815         wxRect& cur = bar.mBounds;
 816
 817         // if bar hits the left edge
 818         if ( theBar.x <= cur.x )
 819         {
 820             InsertBefore( &bar, pTheBar, row );
 821             return;
 822         }
 823
 824         else
 825         // if bar hits the right edge
 826         if ( theBar.x <= cur.x + cur.width )
 827         {
 828             if ( theBar.x + theBar.width > cur.x + cur.width )
 829             {
 830                 InsertBefore( bar.mpNext, pTheBar, row );
 831                 return;
 832             }
 833
 834             // otherwise the bar lies within the bounds of current bar
 835
 836             int leftDist  = theBar.x - cur.x;
 837             int rightDist = cur.x + cur.width - (theBar.x + theBar.width);
 838
 839             if ( leftDist < rightDist )
 840
 841                 InsertBefore( &bar, pTheBar, row );
 842             else
 843                 InsertBefore( bar.mpNext, pTheBar, row );
 844
 845             return;
 846         }
 847     }
 848
 849     InsertBefore( NULL, pTheBar, row ); // insert at the end
 850 }
 851
 852 // evnet handlers
 853
 854 void cbRowLayoutPlugin::OnInsertBar( cbInsertBarEvent& event )
 855 {
 856     cbBarInfo* pBarToInsert = event.mpBar;
 857     cbRowInfo* pIntoRow     = event.mpRow;
 858     mpPane                  = event.mpPane;
 859
 860     if ( !pBarToInsert->IsFixed() )
 861
 862         AdjustLengthOfInserted( pIntoRow, pBarToInsert );
 863
 864     DoInsertBar( pBarToInsert, *pIntoRow );
 865
 866     mpPane->InitLinksForRow( pIntoRow ); // relink "mpNext/mpPrev"s
 867
 868     // perform relayouting of the bars after insertion
 869
 870     // init bar location info
 871     pBarToInsert->mAlignment = event.mpPane->mAlignment;
 872     pBarToInsert->mRowNo     = event.mpPane->GetRowIndex( pIntoRow );
 873
 874 #ifdef __EXPERIMENTAL
 875
 876     if ( !pIntoRow->mHasOnlyFixedBars || !pBarToInsert->IsFixed() )
 877
 878         RecalcLengthRatios( pIntoRow );
 879
 880 #endif
 881
 882     MinimzeNotFixedBars( pIntoRow, pBarToInsert );
 883
 884     SlideLeftSideBars ( pBarToInsert );
 885     SlideRightSideBars( pBarToInsert );
 886
 887     ShiftLeftTrashold ( pBarToInsert, *pIntoRow );
 888     ShiftRightTrashold( pBarToInsert, *pIntoRow );
 889
 890     mpPane->SyncRowFlags( pIntoRow );
 891
 892     CheckIfAtTheBoundary( pBarToInsert, *pIntoRow );
 893
 894     if ( event.mpPane->IsHorizontal() )
 895
 896         pBarToInsert->mState = wxCBAR_DOCKED_HORIZONTALLY;
 897     else
 898         pBarToInsert->mState = wxCBAR_DOCKED_VERTICALLY;
 899
 900     if ( !pIntoRow->mHasOnlyFixedBars )
 901     {
 902
 903 #ifdef __EXPERIMENTAL
 904
 905         ExpandNotFixedBars( pIntoRow );
 906 #else
 907
 908         RelayoutNotFixedBarsAround( pBarToInsert, pIntoRow );
 909         RecalcLengthRatios( pIntoRow );
 910
 911 #endif
 912
 913         DetectBarHandles( pIntoRow );
 914
 915         // do proportional resizing of not-fixed bars
 916         ApplyLengthRatios( pIntoRow );
 917     }
 918
 919     // adjust the bar's docking state
 920
 921     // a little bit of AI:
 922     // memorize bar's height and width, when docked in
 923     // the current orientation - by making the current
 924     // dimensions to be "preferred" ones for this docking state
 925
 926     if ( !pBarToInsert->IsFixed() )
 927     {
 928         cbBarInfo& bar = *pBarToInsert;
 929
 930         bar.mDimInfo.mSizes[ bar.mState ].x = bar.mBounds.width;
 931         bar.mDimInfo.mSizes[ bar.mState ].y = bar.mBounds.height;
 932     }
 933 }
 934
 935 void cbRowLayoutPlugin::OnRemoveBar ( cbRemoveBarEvent& event )
 936 {
 937     cbBarInfo* pBar = event.mpBar;
 938     mpPane          = event.mpPane;
 939
 940     cbRowInfo* pRow = pBar->mpRow;
 941
 942     mpLayout->GetUpdatesManager().OnBarWillChange( pBar, pRow, event.mpPane );
 943
 944     // invalidate the whole row
 945     //pFirst->mpRowInfo->mMgrData.mPrevBounds.x = -1;
 946
 947     pRow->mBars.Remove( pBar );
 948
 949     // rest bar information after removing it from the row
 950     pBar->mpRow           = NULL;
 951     pBar->mHasLeftHandle  = FALSE;
 952     pBar->mHasRightHandle = FALSE;
 953
 954     mpPane->InitLinksForRow( pRow ); // relink "mpNext/mpPrev"s
 955
 956     if ( pRow->mBars.Count() == 0 )
 957     {
 958         // empty rows should not exist
 959
 960         event.mpPane->GetRowList().Remove( pRow );
 961
 962         delete pRow;
 963
 964         mpPane->InitLinksForRows();
 965     }
 966     else
 967     {
 968         // force repainting of bars, in the row, from which the bar was removed
 969
 970         // FIXME:: really needed?
 971         pRow->mBars[0]->mUMgrData.SetDirty(TRUE);
 972
 973         // re-setup mHasOnlyFixedBars flag for the row information
 974         event.mpPane->SyncRowFlags( pRow );
 975
 976         DetectBarHandles( pRow );
 977
 978         if ( !pRow->mHasOnlyFixedBars )
 979
 980             ExpandNotFixedBars( pRow );
 981     }
 982 }
 983
 984 void cbRowLayoutPlugin::OnLayoutRow( cbLayoutRowEvent& event )
 985 {
 986     cbRowInfo* pRow = event.mpRow;
 987     mpPane          = event.mpPane;
 988
 989     MinimzeNotFixedBars( pRow, NULL );
 990
 991     if ( !pRow->mHasOnlyFixedBars )
 992     {
 993         // do proportional resizing of not-fixed bars
 994         ApplyLengthRatios( pRow );
 995     }
 996
 997     cbBarInfo& lastBar  = *pRow->mBars[ pRow->mBars.Count() - 1 ];
 998     cbBarInfo& firstBar = *pRow->mBars[ 0 ];
 999
1000     // FIXME:: Next line not used
1001     // wxRect& bounds = lastBar.mBounds;
1002
1003     if ( lastBar.mBounds.x + lastBar.mBounds.width > mpPane->mPaneWidth )
1004     {
1005         lastBar.mBounds.x = mpPane->mPaneWidth - lastBar.mBounds.width;
1006
1007         // first simulate left-row-edge friction
1008
1009         SlideLeftSideBars( &lastBar );
1010
1011         if ( firstBar.mBounds.x < 0 )
1012             firstBar.mBounds.x = 0;
1013
1014         // then left-row-edge function, though this
1015         // may cause some of the right-side bars going
1016         // out of row bounds, but left-side always
1017         // has the highest "priority"
1018
1019         SlideRightSideBars( &firstBar );
1020     }
1021
1022     event.Skip(); // pass event to the next handler
1023 }
1024
1025 void cbRowLayoutPlugin::OnLayoutRows( cbLayoutRowsEvent& event )
1026 {
1027     mpPane       = event.mpPane;
1028
1029     int curY = 0;
1030
1031     // FIXME:: Next line not used.
1032     // RowArrayT& arr = mpPane->GetRowList();
1033
1034     size_t i;
1035     for ( i = 0; i != mpPane->GetRowList().Count(); ++i )
1036     {
1037         cbRowInfo& row = *mpPane->GetRowList()[ i ];
1038
1039         // setup "has-handle" flags for rows, which depend on the existance
1040         // of not-fixed bars in the row
1041
1042         if ( !row.mHasOnlyFixedBars )
1043         {
1044             if ( mpPane->mAlignment == FL_ALIGN_TOP ||
1045                  mpPane->mAlignment == FL_ALIGN_LEFT   )
1046             {
1047                 row.mHasLowerHandle = TRUE;
1048
1049                 row.mHasUpperHandle = FALSE;
1050             }
1051             else
1052             {
1053                 row.mHasUpperHandle = TRUE;
1054
1055                 row.mHasLowerHandle = FALSE;
1056             }
1057         }
1058         else
1059         {
1060             // otherwise, rows with fixed-bars only, have no height-resizing handles
1061             row.mHasUpperHandle = FALSE;
1062             row.mHasLowerHandle = FALSE;
1063         }
1064
1065         // setup vertical positions for items in the row
1066
1067         row.mRowY = curY;
1068
1069         row.mRowWidth  = mpPane->mPaneWidth;
1070         row.mRowHeight = CalcRowHeight( row );
1071
1072         LayoutItemsVertically( row );
1073
1074         if ( row.mHasUpperHandle )
1075             row.mRowHeight += mpPane->mProps.mResizeHandleSize;
1076         if ( row.mHasLowerHandle )
1077             row.mRowHeight += mpPane->mProps.mResizeHandleSize;
1078
1079         curY += row.mRowHeight;
1080     }
1081
1082     event.Skip(); // pass event to the next handler - other hookeds plugin
1083                   // may also add some "refinements" to the layout now
1084 }
1085
1086 void cbRowLayoutPlugin::OnResizeRow( cbResizeRowEvent& event )
1087 {
1088     // extract resize-event info
1089     int     ofs            = event.mHandleOfs;
1090     bool    forUpperHandle = event.mForUpperHandle;
1091     cbRowInfo* pTheRow     = event.mpRow;
1092             mpPane         = event.mpPane;
1093
1094     // FIXME:: Next line not used.
1095     //int     newHeight      = pTheRow->mRowHeight;
1096
1097     int     freeSpc        = 0;
1098
1099     if ( forUpperHandle )
1100     {
1101         // calculate available free space from above,
1102         // which can be obtained by squeezing not-fixed height rows
1103
1104         cbRowInfo* pRow = pTheRow->mpPrev;
1105
1106         while( pRow )
1107         {
1108             freeSpc += pRow->mRowHeight - event.mpPane->GetMinimalRowHeight( pRow );
1109
1110             pRow = pRow->mpPrev;
1111         }
1112     }
1113     else
1114     {
1115         // calculate available free space from below,
1116         // which can be obtained by squeezing not-fixed height rows
1117
1118         cbRowInfo* pRow = pTheRow->mpNext;
1119
1120         while( pRow )
1121         {
1122             freeSpc += pRow->mRowHeight - mpPane->GetMinimalRowHeight( pRow );
1123
1124             pRow = pRow->mpNext;
1125         }
1126     }
1127
1128     mpLayout->GetUpdatesManager().OnStartChanges();
1129
1130     int clientSize;
1131
1132     // allow user adjusting pane vs. client-area space, for upper-handle
1133
1134     if ( mpPane->IsHorizontal() )
1135
1136         clientSize = mpLayout->GetClientHeight();
1137     else
1138         clientSize = mpLayout->GetClientWidth();
1139
1140     if ( forUpperHandle && ofs < -clientSize )
1141     {
1142         int needed = -(ofs + clientSize);
1143
1144         cbRowInfo* pRow = mpPane->GetRowList()[ 0 ];
1145
1146         // start squeezing rows from the top row towards bottom
1147
1148         while( pRow != pTheRow && needed )
1149         {
1150             // only not-fixed rows can be squeezed
1151
1152             if ( !pRow->mHasOnlyFixedBars )
1153             {
1154                 int prevHeight = pRow->mRowHeight;
1155
1156                 int newHeight  = wxMax( event.mpPane->GetMinimalRowHeight( pRow ),
1157                                         prevHeight - needed );
1158
1159                 if ( newHeight != prevHeight )
1160                 {
1161                     event.mpPane->SetRowHeight( pRow, newHeight );
1162
1163                     needed -= prevHeight - pRow->mRowHeight;
1164                 }
1165             }
1166
1167             pRow = pRow->mpNext;
1168         }
1169     }
1170
1171     // allow user adjusting pane vs. client-area space, for lower-handle
1172
1173     if ( !forUpperHandle && ofs > clientSize )
1174     {
1175         int needed = ofs - clientSize;
1176
1177         cbRowInfo* pRow = mpPane->GetRowList()[ mpPane->GetRowList().Count() - 1 ];
1178
1179         // start squeezing rows from the bottom towards the top row
1180
1181         while( pRow && needed )
1182         {
1183             // only not-fixed rows can be squeezed
1184
1185             if ( !pRow->mHasOnlyFixedBars )
1186             {
1187                 int prevHeight = pRow->mRowHeight;
1188
1189                 int newHeight  = wxMax( event.mpPane->GetMinimalRowHeight( pRow ),
1190                                         prevHeight - needed );
1191
1192                 if ( newHeight != prevHeight )
1193                 {
1194                     event.mpPane->SetRowHeight( pRow, newHeight );
1195
1196                     needed -= prevHeight - pRow->mRowHeight;
1197                 }
1198             }
1199
1200             pRow = pRow->mpPrev;
1201         }
1202     }
1203
1204     if ( forUpperHandle )
1205
1206         event.mpPane->SetRowHeight( pTheRow, pTheRow->mRowHeight + (-ofs) );
1207     else
1208         event.mpPane->SetRowHeight( pTheRow, pTheRow->mRowHeight +   ofs  );
1209
1210     mpLayout->RecalcLayout(FALSE);
1211
1212     mpLayout->GetUpdatesManager().OnFinishChanges();
1213     mpLayout->GetUpdatesManager().UpdateNow();
1214 }
1215