src/common/gbsizer.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        gbsizer.cpp
   3 // Purpose:     wxGridBagSizer:  A sizer that can lay out items in a grid,
   4 //              with items at specified cells, and with the option of row
   5 //              and/or column spanning
   6 //
   7 // Author:      Robin Dunn
   8 // Created:     03-Nov-2003
   9 // RCS-ID:      $Id$
  10 // Copyright:   (c) Robin Dunn
  11 // Licence:     wxWindows licence
  12 /////////////////////////////////////////////////////////////////////////////
  13
  14
  15 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16 #pragma implementation "gbsizer.h"
  17 #endif
  18
  19 // For compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #include "wx/gbsizer.h"
  27
  28 //---------------------------------------------------------------------------
  29
  30 IMPLEMENT_DYNAMIC_CLASS(wxGBSizerItem, wxSizerItem)
  31 IMPLEMENT_CLASS(wxGridBagSizer, wxFlexGridSizer)
  32
  33 const wxGBSpan wxDefaultSpan;
  34
  35 //---------------------------------------------------------------------------
  36 // wxGBSizerItem
  37 //---------------------------------------------------------------------------
  38
  39 wxGBSizerItem::wxGBSizerItem( int width,
  40                               int height,
  41                               const wxGBPosition& pos,
  42                               const wxGBSpan& span,
  43                               int flag,
  44                               int border,
  45                               wxObject* userData)
  46     : wxSizerItem(width, height, 0, flag, border, userData),
  47       m_pos(pos),
  48       m_span(span),
  49       m_sizer(NULL)
  50 {
  51 }
  52
  53
  54 wxGBSizerItem::wxGBSizerItem( wxWindow *window,
  55                               const wxGBPosition& pos,
  56                               const wxGBSpan& span,
  57                               int flag,
  58                               int border,
  59                               wxObject* userData )
  60     : wxSizerItem(window, 0, flag, border, userData),
  61       m_pos(pos),
  62       m_span(span),
  63       m_sizer(NULL)
  64 {
  65 }
  66
  67
  68 wxGBSizerItem::wxGBSizerItem( wxSizer *sizer,
  69                               const wxGBPosition& pos,
  70                               const wxGBSpan& span,
  71                               int flag,
  72                               int border,
  73                               wxObject* userData )
  74     : wxSizerItem(sizer, 0, flag, border, userData),
  75       m_pos(pos),
  76       m_span(span),
  77       m_sizer(NULL)
  78 {
  79 }
  80
  81 wxGBSizerItem::wxGBSizerItem()
  82     : wxSizerItem(),
  83       m_pos(-1,-1),
  84       m_span(-1,-1),
  85       m_sizer(NULL)
  86 {
  87 }
  88
  89 //---------------------------------------------------------------------------
  90
  91
  92 void wxGBSizerItem::GetPos(int& row, int& col) const
  93 {
  94     row = m_pos.GetRow();
  95     col = m_pos.GetCol();
  96 }
  97
  98 void wxGBSizerItem::GetSpan(int& rowspan, int& colspan) const
  99 {
 100     rowspan = m_span.GetRowspan();
 101     colspan = m_span.GetColspan();
 102 }
 103
 104
 105 bool wxGBSizerItem::SetPos( const wxGBPosition& pos )
 106 {
 107     if (m_sizer)
 108     {
 109         wxCHECK_MSG( !m_sizer->CheckForIntersection(pos, m_span, this), false,
 110                  wxT("An item is already at that position") );
 111     }
 112     m_pos = pos;
 113     return true;
 114 }
 115
 116 bool wxGBSizerItem::SetSpan( const wxGBSpan& span )
 117 {
 118     if (m_sizer)
 119     {
 120         wxCHECK_MSG( !m_sizer->CheckForIntersection(m_pos, span, this), false,
 121                  wxT("An item is already at that position") );
 122     }
 123     m_span = span;
 124     return true;
 125 }
 126
 127
 128 inline bool InRange(int val, int min, int max)
 129 {
 130     return (val >= min && val <= max);
 131 }
 132
 133 bool wxGBSizerItem::Intersects(const wxGBSizerItem& other)
 134 {
 135     return Intersects(other.GetPos(), other.GetSpan());
 136 }
 137
 138 bool wxGBSizerItem::Intersects(const wxGBPosition& pos, const wxGBSpan& span)
 139 {
 140
 141     int row, col, endrow, endcol;
 142     int otherrow, othercol, otherendrow, otherendcol;
 143
 144     GetPos(row, col);
 145     GetEndPos(endrow, endcol);
 146
 147     otherrow = pos.GetRow();
 148     othercol = pos.GetCol();
 149     otherendrow = otherrow + span.GetRowspan() - 1;
 150     otherendcol = othercol + span.GetColspan() - 1;
 151
 152     // is the other item's start or end in the range of this one?
 153     if (( InRange(otherrow, row, endrow) && InRange(othercol, col, endcol) ) ||
 154         ( InRange(otherendrow, row, endrow) && InRange(otherendcol, col, endcol) ))
 155         return true;
 156
 157     // is this item's start or end in the range of the other one?
 158     if (( InRange(row, otherrow, otherendrow) && InRange(col, othercol, otherendcol) ) ||
 159         ( InRange(endrow, otherrow, otherendrow) && InRange(endcol, othercol, otherendcol) ))
 160         return true;
 161
 162     return false;
 163 }
 164
 165
 166 void wxGBSizerItem::GetEndPos(int& row, int& col)
 167 {
 168     row = m_pos.GetRow() + m_span.GetRowspan() - 1;
 169     col = m_pos.GetCol() + m_span.GetColspan() - 1;
 170 }
 171
 172
 173 //---------------------------------------------------------------------------
 174 // wxGridBagSizer
 175 //---------------------------------------------------------------------------
 176
 177 wxGridBagSizer::wxGridBagSizer(int vgap, int hgap )
 178     : wxFlexGridSizer(1, vgap, hgap),
 179       m_emptyCellSize(10,20)
 180
 181 {
 182 }
 183
 184
 185 bool wxGridBagSizer::Add( wxWindow *window,
 186                           const wxGBPosition& pos, const wxGBSpan& span,
 187                           int flag, int border,  wxObject* userData )
 188 {
 189     wxGBSizerItem* item = new wxGBSizerItem(window, pos, span, flag, border, userData);
 190     if ( Add(item) )
 191         return true;
 192     else
 193     {
 194         delete item;
 195         return false;
 196     }
 197 }
 198
 199 bool wxGridBagSizer::Add( wxSizer *sizer,
 200                           const wxGBPosition& pos, const wxGBSpan& span,
 201                           int flag, int border,  wxObject* userData )
 202 {
 203     wxGBSizerItem* item = new wxGBSizerItem(sizer, pos, span, flag, border, userData);
 204     if ( Add(item) )
 205         return true;
 206     else
 207     {
 208         delete item;
 209         return false;
 210     }
 211 }
 212
 213 bool wxGridBagSizer::Add( int width, int height,
 214                           const wxGBPosition& pos, const wxGBSpan& span,
 215                           int flag, int border,  wxObject* userData )
 216 {
 217     wxGBSizerItem* item = new wxGBSizerItem(width, height, pos, span, flag, border, userData);
 218     if ( Add(item) )
 219         return true;
 220     else
 221     {
 222         delete item;
 223         return false;
 224     }
 225 }
 226
 227 bool wxGridBagSizer::Add( wxGBSizerItem *item )
 228 {
 229         m_children.Append(item);
 230     item->SetSizer(this);
 231     if ( item->GetWindow() )
 232         item->GetWindow()->SetContainingSizer( this );
 233
 234     return true;
 235 }
 236
 237
 238
 239 //---------------------------------------------------------------------------
 240
 241 wxGBPosition wxGridBagSizer::GetItemPosition(wxWindow *window)
 242 {
 243     wxGBPosition badpos(-1,-1);
 244     wxGBSizerItem* item = FindItem(window);
 245     wxCHECK_MSG(item, badpos, wxT("Failed to find item."));
 246     return item->GetPos();
 247 }
 248
 249
 250 wxGBPosition wxGridBagSizer::GetItemPosition(wxSizer *sizer)
 251 {
 252     wxGBPosition badpos(-1,-1);
 253     wxGBSizerItem* item = FindItem(sizer);
 254     wxCHECK_MSG(item, badpos, wxT("Failed to find item."));
 255     return item->GetPos();
 256 }
 257
 258
 259 wxGBPosition wxGridBagSizer::GetItemPosition(size_t index)
 260 {
 261     wxGBPosition badpos(-1,-1);
 262     wxSizerItemList::compatibility_iterator node = m_children.Item( index );
 263     wxCHECK_MSG( node, badpos, _T("Failed to find item.") );
 264     wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
 265     return item->GetPos();
 266 }
 267
 268
 269
 270 bool wxGridBagSizer::SetItemPosition(wxWindow *window, const wxGBPosition& pos)
 271 {
 272     wxGBSizerItem* item = FindItem(window);
 273     wxCHECK_MSG(item, false, wxT("Failed to find item."));
 274     return item->SetPos(pos);
 275 }
 276
 277
 278 bool wxGridBagSizer::SetItemPosition(wxSizer *sizer, const wxGBPosition& pos)
 279 {
 280     wxGBSizerItem* item = FindItem(sizer);
 281     wxCHECK_MSG(item, false, wxT("Failed to find item."));
 282     return item->SetPos(pos);
 283 }
 284
 285
 286 bool wxGridBagSizer::SetItemPosition(size_t index, const wxGBPosition& pos)
 287 {
 288     wxSizerItemList::compatibility_iterator node = m_children.Item( index );
 289     wxCHECK_MSG( node, false, _T("Failed to find item.") );
 290     wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
 291     return item->SetPos(pos);
 292 }
 293
 294
 295
 296 wxGBSpan wxGridBagSizer::GetItemSpan(wxWindow *window)
 297 {
 298     wxGBSpan badspan(-1,-1);
 299     wxGBSizerItem* item = FindItem(window);
 300     wxCHECK_MSG( item, badspan, _T("Failed to find item.") );
 301     return item->GetSpan();
 302 }
 303
 304
 305 wxGBSpan wxGridBagSizer::GetItemSpan(wxSizer *sizer)
 306 {
 307     wxGBSpan badspan(-1,-1);
 308     wxGBSizerItem* item = FindItem(sizer);
 309     wxCHECK_MSG( item, badspan, _T("Failed to find item.") );
 310     return item->GetSpan();
 311 }
 312
 313
 314 wxGBSpan wxGridBagSizer::GetItemSpan(size_t index)
 315 {
 316     wxGBSpan badspan(-1,-1);
 317     wxSizerItemList::compatibility_iterator node = m_children.Item( index );
 318     wxCHECK_MSG( node, badspan, _T("Failed to find item.") );
 319     wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
 320     return item->GetSpan();
 321 }
 322
 323
 324
 325 bool wxGridBagSizer::SetItemSpan(wxWindow *window, const wxGBSpan& span)
 326 {
 327     wxGBSizerItem* item = FindItem(window);
 328     wxCHECK_MSG(item, false, wxT("Failed to find item."));
 329     return item->SetSpan(span);
 330 }
 331
 332
 333 bool wxGridBagSizer::SetItemSpan(wxSizer *sizer, const wxGBSpan& span)
 334 {
 335     wxGBSizerItem* item = FindItem(sizer);
 336     wxCHECK_MSG(item, false, wxT("Failed to find item."));
 337     return item->SetSpan(span);
 338 }
 339
 340
 341 bool wxGridBagSizer::SetItemSpan(size_t index, const wxGBSpan& span)
 342 {
 343     wxSizerItemList::compatibility_iterator node = m_children.Item( index );
 344     wxCHECK_MSG( node, false, _T("Failed to find item.") );
 345     wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
 346     return item->SetSpan(span);
 347 }
 348
 349
 350
 351
 352 wxGBSizerItem* wxGridBagSizer::FindItem(wxWindow* window)
 353 {
 354     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
 355     while (node)
 356     {
 357         wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
 358         if ( item->GetWindow() == window )
 359             return item;
 360         node = node->GetNext();
 361     }
 362     return NULL;
 363 }
 364
 365
 366 wxGBSizerItem* wxGridBagSizer::FindItem(wxSizer* sizer)
 367 {
 368     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
 369     while (node)
 370     {
 371         wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
 372         if ( item->GetSizer() == sizer )
 373             return item;
 374         node = node->GetNext();
 375     }
 376     return NULL;
 377 }
 378
 379
 380
 381
 382 wxGBSizerItem* wxGridBagSizer::FindItemAtPosition(const wxGBPosition& pos)
 383 {
 384     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
 385     while (node)
 386     {
 387         wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
 388         if ( item->Intersects(pos, wxDefaultSpan) )
 389             return item;
 390         node = node->GetNext();
 391     }
 392     return NULL;
 393 }
 394
 395
 396
 397
 398 wxGBSizerItem* wxGridBagSizer::FindItemWithData(const wxObject* userData)
 399 {
 400     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
 401     while (node)
 402     {
 403         wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
 404         if ( item->GetUserData() == userData )
 405             return item;
 406         node = node->GetNext();
 407     }
 408     return NULL;
 409 }
 410
 411
 412
 413
 414 //---------------------------------------------------------------------------
 415
 416 // Figure out what all the min row heights and col widths are, and calculate
 417 // min size from that.
 418 wxSize wxGridBagSizer::CalcMin()
 419 {
 420     int idx;
 421
 422     if (m_children.GetCount() == 0)
 423         return m_emptyCellSize;
 424
 425     m_rowHeights.Empty();
 426     m_colWidths.Empty();
 427
 428     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
 429     while (node)
 430     {
 431         wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
 432         if ( item->IsShown() )
 433         {
 434             int row, col, endrow, endcol;
 435
 436             item->GetPos(row, col);
 437             item->GetEndPos(endrow, endcol);
 438
 439             // fill heights and widths upto this item if needed
 440             while ( m_rowHeights.GetCount() <= (size_t)endrow )
 441                 m_rowHeights.Add(m_emptyCellSize.GetHeight());
 442             while ( m_colWidths.GetCount() <= (size_t)endcol )
 443                 m_colWidths.Add(m_emptyCellSize.GetWidth());
 444
 445             // See if this item increases the size of its row(s) or col(s)
 446             wxSize size(item->CalcMin());
 447             for (idx=row; idx <= endrow; idx++)
 448                 m_rowHeights[idx] = wxMax(m_rowHeights[idx], size.GetHeight() / (endrow-row+1));
 449             for (idx=col; idx <= endcol; idx++)
 450                 m_colWidths[idx] = wxMax(m_colWidths[idx], size.GetWidth() / (endcol-col+1));
 451         }
 452         node = node->GetNext();
 453     }
 454
 455     AdjustForFlexDirection();
 456
 457     // Now traverse the heights and widths arrays calcing the totals, including gaps
 458     int width = 0;
 459     int ncols = m_colWidths.GetCount();
 460     for (idx=0; idx < ncols; idx++)
 461         width += m_colWidths[idx] + ( idx == ncols-1 ? 0 : m_hgap );
 462
 463     int height = 0;
 464     int nrows = m_rowHeights.GetCount();
 465     for (idx=0; idx < nrows; idx++)
 466         height += m_rowHeights[idx] + ( idx == nrows-1 ? 0 : m_vgap );
 467
 468     return wxSize(width, height);
 469 }
 470
 471
 472
 473 void wxGridBagSizer::RecalcSizes()
 474 {
 475     if (m_children.GetCount() == 0)
 476         return;
 477
 478     // Calculates minsize and populates m_rowHeights and m_colWidths
 479     wxSize  minsz( CalcMin() );
 480
 481     wxPoint pt( GetPosition() );
 482     wxSize  sz( GetSize() );
 483
 484     int nrows = m_rowHeights.GetCount();
 485     int ncols = m_colWidths.GetCount();
 486     int idx, width, height;
 487
 488     AdjustForGrowables(sz, minsz, nrows, ncols);
 489
 490     // Find the start positions on the window of the rows and columns
 491     wxArrayInt rowpos;
 492     rowpos.Add(0, nrows);
 493     int y = pt.y;
 494     for (idx=0; idx < nrows; idx++)
 495     {
 496         height = m_rowHeights[idx] + m_vgap;
 497         rowpos[idx] = y;
 498         y += height;
 499     }
 500
 501     wxArrayInt colpos;
 502     colpos.Add(0, ncols);
 503     int x = pt.x;
 504     for (idx=0; idx < ncols; idx++)
 505     {
 506         width = m_colWidths[idx] + m_hgap;
 507         colpos[idx] = x;
 508         x += width;
 509     }
 510
 511
 512     // Now iterate the children, setting each child's dimensions
 513     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
 514     while (node)
 515     {
 516         int row, col, endrow, endcol;
 517         wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
 518         item->GetPos(row, col);
 519         item->GetEndPos(endrow, endcol);
 520
 521         height = 0;
 522         for(idx=row; idx <= endrow; idx++)
 523             height += m_rowHeights[idx] + m_vgap;
 524
 525         width = 0;
 526         for (idx=col; idx <= endcol; idx++)
 527             width += m_colWidths[idx] + m_hgap;
 528
 529         SetItemBounds(item, colpos[col], rowpos[row], width, height);
 530
 531         node = node->GetNext();
 532     }
 533 }
 534
 535
 536
 537 //---------------------------------------------------------------------------
 538
 539 bool wxGridBagSizer::CheckForIntersection(wxGBSizerItem* item, wxGBSizerItem* excludeItem)
 540 {
 541     return CheckForIntersection(item->GetPos(), item->GetSpan(), excludeItem);
 542 }
 543
 544 bool wxGridBagSizer::CheckForIntersection(const wxGBPosition& pos, const wxGBSpan& span, wxGBSizerItem* excludeItem)
 545 {
 546     wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
 547     while (node)
 548     {
 549         wxGBSizerItem* item = (wxGBSizerItem*)node->GetData();
 550         node = node->GetNext();
 551
 552         if ( excludeItem && item == excludeItem )
 553             continue;
 554
 555         if ( item->Intersects(pos, span) )
 556             return true;
 557
 558     }
 559     return false;
 560 }
 561
 562
 563 // Assumes a 10x10 grid, and returns the first empty cell found.  This is
 564 // really stupid but it is only used by the Add methods that match the base
 565 // class virtuals, which should normally not be used anyway...
 566 wxGBPosition wxGridBagSizer::FindEmptyCell()
 567 {
 568     int row, col;
 569
 570     for (row=0; row<10; row++)
 571         for (col=0; col<10; col++)
 572         {
 573             wxGBPosition pos(row, col);
 574             if ( !CheckForIntersection(pos, wxDefaultSpan) )
 575                 return pos;
 576         }
 577     return wxGBPosition(-1, -1);
 578 }
 579
 580
 581 //---------------------------------------------------------------------------
 582
 583 // The Add base class virtuals should not be used with this class, but
 584 // we'll try to make them automatically select a location for the item
 585 // anyway.
 586
 587 void wxGridBagSizer::Add( wxWindow *window, int, int flag, int border, wxObject* userData )
 588 {
 589     Add(window, FindEmptyCell(), wxDefaultSpan, flag, border, userData);
 590 }
 591
 592 void wxGridBagSizer::Add( wxSizer *sizer, int, int flag, int border, wxObject* userData )
 593 {
 594     Add(sizer, FindEmptyCell(), wxDefaultSpan, flag, border, userData);
 595 }
 596
 597 void wxGridBagSizer::Add( int width, int height, int, int flag, int border, wxObject* userData )
 598 {
 599     Add(width, height, FindEmptyCell(), wxDefaultSpan, flag, border, userData);
 600 }
 601
 602
 603
 604 // The Insert nad Prepend base class virtuals that are not appropriate for
 605 // this class and should not be used.  Their implementation in this class
 606 // simply fails.
 607
 608 void wxGridBagSizer::Add( wxSizerItem *item )
 609 { wxFAIL_MSG(wxT("Invalid Add form called.")); }
 610
 611 void wxGridBagSizer::Prepend( wxWindow *, int, int, int, wxObject*  )
 612 { wxFAIL_MSG(wxT("Prepend should not be used with wxGridBagSizer.")); }
 613
 614 void wxGridBagSizer::Prepend( wxSizer *, int, int, int, wxObject*  )
 615 { wxFAIL_MSG(wxT("Prepend should not be used with wxGridBagSizer.")); }
 616
 617 void wxGridBagSizer::Prepend( int, int, int, int, int, wxObject*  )
 618 { wxFAIL_MSG(wxT("Prepend should not be used with wxGridBagSizer.")); }
 619
 620 void wxGridBagSizer::Prepend( wxSizerItem * )
 621 { wxFAIL_MSG(wxT("Prepend should not be used with wxGridBagSizer.")); }
 622
 623
 624 void wxGridBagSizer::Insert( size_t, wxWindow *, int, int, int, wxObject*  )
 625 { wxFAIL_MSG(wxT("Insert should not be used with wxGridBagSizer.")); }
 626
 627 void wxGridBagSizer::Insert( size_t, wxSizer *, int, int, int, wxObject*  )
 628 { wxFAIL_MSG(wxT("Insert should not be used with wxGridBagSizer.")); }
 629
 630 void wxGridBagSizer::Insert( size_t, int, int, int, int, int, wxObject*  )
 631 { wxFAIL_MSG(wxT("Insert should not be used with wxGridBagSizer.")); }
 632
 633 void wxGridBagSizer::Insert( size_t, wxSizerItem * )
 634 { wxFAIL_MSG(wxT("Insert should not be used with wxGridBagSizer.")); }
 635
 636
 637 //---------------------------------------------------------------------------
 638 //---------------------------------------------------------------------------