src/common/sizer.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        sizer.cpp
   3 // Purpose:     provide new wxSizer class for layout
   4 // Author:      Robert Roebling and Robin Dunn
   5 // Modified by:
   6 // Created:
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Robin Dunn, Dirk Holtwick and Robert Roebling
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "sizer.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 #include "wx/sizer.h"
  24 #include "wx/utils.h"
  25 #include "wx/statbox.h"
  26 #include "wx/notebook.h"
  27
  28 //---------------------------------------------------------------------------
  29
  30 IMPLEMENT_ABSTRACT_CLASS(wxSizerItem, wxObject);
  31 IMPLEMENT_ABSTRACT_CLASS(wxSizer, wxObject);
  32 IMPLEMENT_ABSTRACT_CLASS(wxBoxSizer, wxSizer);
  33 IMPLEMENT_ABSTRACT_CLASS(wxStaticBoxSizer, wxBoxSizer);
  34 #if wxUSE_NOTEBOOK
  35 IMPLEMENT_ABSTRACT_CLASS(wxNotebookSizer, wxSizer);
  36 #endif
  37
  38 //---------------------------------------------------------------------------
  39 // wxSizerItem
  40 //---------------------------------------------------------------------------
  41
  42 wxSizerItem::wxSizerItem( int width, int height, int option, int flag, int border, wxObject* userData )
  43 {
  44     m_window = (wxWindow *) NULL;
  45     m_sizer = (wxSizer *) NULL;
  46     m_option = option;
  47     m_border = border;
  48     m_flag = flag;
  49     m_userData = userData;
  50
  51     // minimal size is the initial size
  52     m_minSize.x = width;
  53     m_minSize.y = height;
  54
  55     SetRatio(width, height);
  56
  57     // size is set directly
  58     m_size = m_minSize;
  59 }
  60
  61 wxSizerItem::wxSizerItem( wxWindow *window, int option, int flag, int border, wxObject* userData )
  62 {
  63     m_window = window;
  64     m_sizer = (wxSizer *) NULL;
  65     m_option = option;
  66     m_border = border;
  67     m_flag = flag;
  68     m_userData = userData;
  69
  70     // minimal size is the initial size
  71     m_minSize = window->GetSize();
  72
  73     // aspect ratio calculated from initial size
  74     SetRatio(m_minSize);
  75
  76     // size is calculated later
  77     // m_size = ...
  78 }
  79
  80 wxSizerItem::wxSizerItem( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
  81 {
  82     m_window = (wxWindow *) NULL;
  83     m_sizer = sizer;
  84     m_option = option;
  85     m_border = border;
  86     m_flag = flag;
  87     m_userData = userData;
  88
  89     // minimal size is calculated later
  90     // m_minSize = ...
  91     m_ratio = 0;
  92
  93     // size is calculated later
  94     // m_size = ...
  95 }
  96
  97 wxSizerItem::~wxSizerItem()
  98 {
  99     if (m_userData)
 100         delete m_userData;
 101     if (m_sizer)
 102         delete m_sizer;
 103 }
 104
 105
 106 wxSize wxSizerItem::GetSize()
 107 {
 108     wxSize ret;
 109     if (IsSizer())
 110         ret = m_sizer->GetSize();
 111     else
 112     if (IsWindow())
 113         ret = m_window->GetSize();
 114     else ret = m_size;
 115
 116     if (m_flag & wxWEST)
 117         ret.x += m_border;
 118     if (m_flag & wxEAST)
 119         ret.x += m_border;
 120     if (m_flag & wxNORTH)
 121         ret.y += m_border;
 122     if (m_flag & wxSOUTH)
 123         ret.y += m_border;
 124
 125     return ret;
 126 }
 127
 128 wxSize wxSizerItem::CalcMin()
 129 {
 130     wxSize ret;
 131     if (IsSizer())
 132     {
 133         ret = m_sizer->CalcMin();
 134         // if we have to preserve aspect ratio _AND_ this is
 135         // the first-time calculation, consider ret to be initial size
 136         if ((m_flag & wxSHAPED) && !m_ratio) SetRatio(ret);
 137     }
 138
 139 /*
 140     The minimum size of a window should be the
 141     initial size, as saved in m_minSize, not the
 142     current size.
 143
 144     else
 145     if (IsWindow())
 146         ret = m_window->GetSize();
 147 */
 148     else ret = m_minSize;
 149
 150     if (m_flag & wxWEST)
 151         ret.x += m_border;
 152     if (m_flag & wxEAST)
 153         ret.x += m_border;
 154     if (m_flag & wxNORTH)
 155         ret.y += m_border;
 156     if (m_flag & wxSOUTH)
 157         ret.y += m_border;
 158
 159     return ret;
 160 }
 161
 162 void wxSizerItem::SetDimension( wxPoint pos, wxSize size )
 163 {
 164     if (m_flag & wxWEST)
 165     {
 166         pos.x += m_border;
 167         size.x -= m_border;
 168     }
 169     if (m_flag & wxEAST)
 170     {
 171         size.x -= m_border;
 172     }
 173     if (m_flag & wxNORTH)
 174     {
 175         pos.y += m_border;
 176         size.y -= m_border;
 177     }
 178     if (m_flag & wxSOUTH)
 179     {
 180         size.y -= m_border;
 181     }
 182     if (m_flag & wxSHAPED) {
 183         // adjust aspect ratio
 184         int rwidth = (int) (size.y * m_ratio);
 185         if (rwidth > size.x) {
 186             // fit horizontally
 187             int rheight = (int) (size.x / m_ratio);
 188             // add vertical space
 189             if (m_flag & wxALIGN_CENTER_VERTICAL)
 190                 pos.y += (size.y - rheight) / 2;
 191             else if (m_flag & wxALIGN_BOTTOM)
 192                 pos.y += (size.y - rheight);
 193             // use reduced dimensions
 194             size.y =rheight;
 195         } else if (rwidth < size.x) {
 196             // add horizontal space
 197             if (m_flag & wxALIGN_CENTER_HORIZONTAL)
 198                 pos.x += (size.x - rwidth) / 2;
 199             else if (m_flag & wxALIGN_RIGHT)
 200                 pos.x += (size.x - rwidth);
 201             size.x = rwidth;
 202         }
 203     }
 204
 205     if (IsSizer())
 206         m_sizer->SetDimension( pos.x, pos.y, size.x, size.y );
 207
 208     if (IsWindow())
 209         m_window->SetSize( pos.x, pos.y, size.x, size.y );
 210
 211     m_size = size;
 212 }
 213
 214 bool wxSizerItem::IsWindow()
 215 {
 216     return (m_window != NULL);
 217 }
 218
 219 bool wxSizerItem::IsSizer()
 220 {
 221     return (m_sizer != NULL);
 222 }
 223
 224 bool wxSizerItem::IsSpacer()
 225 {
 226     return (m_window == NULL) && (m_sizer == NULL);
 227 }
 228
 229 //---------------------------------------------------------------------------
 230 // wxSizer
 231 //---------------------------------------------------------------------------
 232
 233 wxSizer::wxSizer()
 234 {
 235     m_children.DeleteContents( TRUE );
 236 }
 237
 238 wxSizer::~wxSizer()
 239 {
 240 }
 241
 242 void wxSizer::Add( wxWindow *window, int option, int flag, int border, wxObject* userData )
 243 {
 244     m_children.Append( new wxSizerItem( window, option, flag, border, userData ) );
 245 }
 246
 247 void wxSizer::Add( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 248 {
 249     m_children.Append( new wxSizerItem( sizer, option, flag, border, userData ) );
 250 }
 251
 252 void wxSizer::Add( int width, int height, int option, int flag, int border, wxObject* userData )
 253 {
 254     m_children.Append( new wxSizerItem( width, height, option, flag, border, userData ) );
 255 }
 256
 257 void wxSizer::Prepend( wxWindow *window, int option, int flag, int border, wxObject* userData )
 258 {
 259     m_children.Insert( new wxSizerItem( window, option, flag, border, userData ) );
 260 }
 261
 262 void wxSizer::Prepend( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 263 {
 264     m_children.Insert( new wxSizerItem( sizer, option, flag, border, userData ) );
 265 }
 266
 267 void wxSizer::Prepend( int width, int height, int option, int flag, int border, wxObject* userData )
 268 {
 269     m_children.Insert( new wxSizerItem( width, height, option, flag, border, userData ) );
 270 }
 271
 272 void wxSizer::Insert( int before, wxWindow *window, int option, int flag, int border, wxObject* userData )
 273 {
 274     m_children.Insert( before, new wxSizerItem( window, option, flag, border, userData ) );
 275 }
 276
 277 void wxSizer::Insert( int before, wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 278 {
 279     m_children.Insert( before, new wxSizerItem( sizer, option, flag, border, userData ) );
 280 }
 281
 282 void wxSizer::Insert( int before, int width, int height, int option, int flag, int border, wxObject* userData )
 283 {
 284     m_children.Insert( before, new wxSizerItem( width, height, option, flag, border, userData ) );
 285 }
 286
 287 bool wxSizer::Remove( wxWindow *window )
 288 {
 289     wxASSERT( window );
 290
 291     wxNode *node = m_children.First();
 292     while (node)
 293     {
 294         wxSizerItem *item = (wxSizerItem*)node->Data();
 295         if (item->GetWindow() == window)
 296         {
 297             m_children.DeleteNode( node );
 298             return TRUE;
 299         }
 300         node = node->Next();
 301     }
 302
 303     return FALSE;
 304 }
 305
 306 bool wxSizer::Remove( wxSizer *sizer )
 307 {
 308     wxASSERT( sizer );
 309
 310     wxNode *node = m_children.First();
 311     while (node)
 312     {
 313         wxSizerItem *item = (wxSizerItem*)node->Data();
 314         if (item->GetSizer() == sizer)
 315         {
 316             m_children.DeleteNode( node );
 317             return TRUE;
 318         }
 319         node = node->Next();
 320     }
 321
 322     return FALSE;
 323 }
 324
 325 bool wxSizer::Remove( int pos )
 326 {
 327     wxNode *node = m_children.Nth( pos );
 328     if (!node) return FALSE;
 329
 330     m_children.DeleteNode( node );
 331
 332     return TRUE;
 333 }
 334
 335 void wxSizer::Fit( wxWindow *window )
 336 {
 337     window->SetSize( GetMinWindowSize( window ) );
 338 }
 339
 340 void wxSizer::Layout()
 341 {
 342     CalcMin();
 343     RecalcSizes();
 344 }
 345
 346 void wxSizer::SetSizeHints( wxWindow *window )
 347 {
 348     wxSize size( GetMinWindowSize( window ) );
 349     window->SetSizeHints( size.x, size.y );
 350 }
 351
 352 wxSize wxSizer::GetMinWindowSize( wxWindow *window )
 353 {
 354     wxSize minSize( GetMinSize() );
 355     wxSize size( window->GetSize() );
 356     wxSize client_size( window->GetClientSize() );
 357     return wxSize( minSize.x+size.x-client_size.x,
 358                    minSize.y+size.y-client_size.y );
 359 }
 360
 361 void wxSizer::SetDimension( int x, int y, int width, int height )
 362 {
 363     m_position.x = x;
 364     m_position.y = y;
 365     m_size.x = width;
 366     m_size.y = height;
 367     CalcMin();
 368     RecalcSizes();
 369 }
 370
 371 //---------------------------------------------------------------------------
 372 // wxBoxSizer
 373 //---------------------------------------------------------------------------
 374
 375 wxBoxSizer::wxBoxSizer( int orient )
 376 {
 377     m_orient = orient;
 378 }
 379
 380 void wxBoxSizer::RecalcSizes()
 381 {
 382     if (m_children.GetCount() == 0)
 383         return;
 384
 385     int delta = 0;
 386     int extra = 0;
 387     if (m_stretchable)
 388     {
 389         if (m_orient == wxHORIZONTAL)
 390         {
 391             delta = (m_size.x - m_fixedWidth) / m_stretchable;
 392             extra = (m_size.x - m_fixedWidth) % m_stretchable;
 393         }
 394         else
 395         {
 396             delta = (m_size.y - m_fixedHeight) / m_stretchable;
 397             extra = (m_size.y - m_fixedHeight) % m_stretchable;
 398         }
 399     }
 400
 401     wxPoint pt( m_position );
 402
 403     wxNode *node = m_children.GetFirst();
 404     while (node)
 405     {
 406         wxSizerItem *item = (wxSizerItem*) node->Data();
 407
 408         int weight = 1;
 409         if (item->GetOption())
 410             weight = item->GetOption();
 411
 412         wxSize size( item->CalcMin() );
 413
 414         if (m_orient == wxVERTICAL)
 415         {
 416             long height = size.y;
 417             if (item->GetOption())
 418             {
 419                 height = (delta * weight) + extra;
 420                 extra = 0; // only the first item will get the remainder as extra size
 421             }
 422
 423             wxPoint child_pos( pt );
 424             wxSize  child_size( wxSize( size.x, height) );
 425
 426             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
 427               child_size.x = m_size.x;
 428             else if (item->GetFlag() & wxALIGN_RIGHT)
 429               child_pos.x += m_size.x - size.x;
 430             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_HORIZONTAL))
 431               // XXX wxCENTER is added for backward compatibility;
 432               //     wxALIGN_CENTER should be used in new code
 433               child_pos.x += (m_size.x - size.x) / 2;
 434
 435             item->SetDimension( child_pos, child_size );
 436
 437             pt.y += height;
 438         }
 439         else
 440         {
 441             long width = size.x;
 442             if (item->GetOption())
 443             {
 444                 width = (delta * weight) + extra;
 445                 extra = 0; // only the first item will get the remainder as extra size
 446             }
 447
 448             wxPoint child_pos( pt );
 449             wxSize  child_size( wxSize(width, size.y) );
 450
 451             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
 452               child_size.y = m_size.y;
 453             else if (item->GetFlag() & wxALIGN_BOTTOM)
 454               child_pos.y += m_size.y - size.y;
 455             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_VERTICAL))
 456               // XXX wxCENTER is added for backward compatibility;
 457               //     wxALIGN_CENTER should be used in new code
 458               child_pos.y += (m_size.y - size.y) / 2;
 459
 460             item->SetDimension( child_pos, child_size );
 461
 462             pt.x += width;
 463         }
 464
 465         node = node->Next();
 466     }
 467 }
 468
 469 wxSize wxBoxSizer::CalcMin()
 470 {
 471     if (m_children.GetCount() == 0)
 472         return wxSize(2,2);
 473
 474     m_stretchable = 0;
 475     m_minWidth = 0;
 476     m_minHeight = 0;
 477     m_fixedWidth = 0;
 478     m_fixedHeight = 0;
 479
 480     wxNode *node = m_children.GetFirst();
 481     while (node)
 482     {
 483         wxSizerItem *item = (wxSizerItem*) node->Data();
 484
 485         int weight = 1;
 486         if (item->GetOption())
 487             weight = item->GetOption();
 488
 489         wxSize size( item->CalcMin() );
 490
 491         if (m_orient == wxHORIZONTAL)
 492         {
 493             m_minWidth += (size.x * weight);
 494             m_minHeight = wxMax( m_minHeight, size.y );
 495         }
 496         else
 497         {
 498             m_minHeight += (size.y * weight);
 499             m_minWidth = wxMax( m_minWidth, size.x );
 500         }
 501
 502         if (item->GetOption())
 503         {
 504             m_stretchable += weight;
 505         }
 506         else
 507         {
 508             if (m_orient == wxVERTICAL)
 509             {
 510                 m_fixedHeight += size.y;
 511                 m_fixedWidth = wxMax( m_fixedWidth, size.x );
 512             }
 513             else
 514             {
 515                 m_fixedWidth += size.x;
 516                 m_fixedHeight = wxMax( m_fixedHeight, size.y );
 517             }
 518         }
 519
 520         node = node->Next();
 521     }
 522
 523     return wxSize( m_minWidth, m_minHeight );
 524 }
 525
 526 //---------------------------------------------------------------------------
 527 // wxStaticBoxSizer
 528 //---------------------------------------------------------------------------
 529
 530 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
 531   : wxBoxSizer( orient )
 532 {
 533     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
 534
 535     m_staticBox = box;
 536 }
 537
 538 void wxStaticBoxSizer::RecalcSizes()
 539 {
 540     // this will have to be done platform by platform
 541     // as there is no way to guess the thickness of
 542     // a wxStaticBox border
 543     int top_border = 15;
 544     if (m_staticBox->GetLabel().IsEmpty()) top_border = 5;
 545     int other_border = 5;
 546
 547     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
 548
 549     wxPoint old_pos( m_position );
 550     m_position.x += other_border;
 551     m_position.y += top_border;
 552     wxSize old_size( m_size );
 553     m_size.x -= 2*other_border;
 554     m_size.y -= top_border + other_border;
 555
 556     wxBoxSizer::RecalcSizes();
 557
 558     m_position = old_pos;
 559     m_size = old_size;
 560 }
 561
 562 wxSize wxStaticBoxSizer::CalcMin()
 563 {
 564     // This will have to be done platform by platform
 565     // as there is no way to guess the thickness of
 566     // a wxStaticBox border.
 567
 568     int top_border = 15;
 569     if (m_staticBox->GetLabel().IsEmpty()) top_border = 5;
 570     int other_border = 5;
 571
 572     wxSize ret( wxBoxSizer::CalcMin() );
 573     ret.x += 2*top_border;
 574     ret.y += other_border + top_border;
 575
 576     return ret;
 577 }
 578
 579 //---------------------------------------------------------------------------
 580 // wxNotebookSizer
 581 //---------------------------------------------------------------------------
 582
 583 #if wxUSE_NOTEBOOK
 584
 585 wxNotebookSizer::wxNotebookSizer( wxNotebook *nb )
 586 {
 587     wxASSERT_MSG( nb, wxT("wxNotebookSizer needs a notebook") );
 588
 589     m_notebook = nb;
 590 }
 591
 592 void wxNotebookSizer::RecalcSizes()
 593 {
 594     m_notebook->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
 595 }
 596
 597 wxSize wxNotebookSizer::CalcMin()
 598 {
 599     // This will have to be done platform by platform
 600     // as there is no way to guess the thickness of
 601     // the wxNotebook tabs and border.
 602
 603     int borderX = 5;
 604     int borderY = 5;
 605     if ((m_notebook->HasFlag(wxNB_RIGHT)) ||
 606         (m_notebook->HasFlag(wxNB_LEFT)))
 607     {
 608         borderX += 70; // improvements later..
 609     }
 610     else
 611     {
 612         borderY += 35; // improvements later..
 613     }
 614
 615     if (m_notebook->GetChildren().GetCount() == 0)
 616         return wxSize(borderX + 10, borderY + 10);
 617
 618     int maxX = 0;
 619     int maxY = 0;
 620
 621     wxWindowList::Node *node = m_notebook->GetChildren().GetFirst();
 622     while (node)
 623     {
 624         wxWindow *item = node->GetData();
 625         wxSizer *itemsizer = item->GetSizer();
 626
 627         if (itemsizer)
 628         {
 629             wxSize subsize( itemsizer->CalcMin() );
 630
 631             if (subsize.x > maxX) maxX = subsize.x;
 632             if (subsize.y > maxY) maxY = subsize.y;
 633         }
 634
 635         node = node->GetNext();
 636     }
 637
 638     return wxSize( borderX + maxX, borderY + maxY );
 639 }
 640
 641 #endif // wxUSE_NOTEBOOK