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
  27 //---------------------------------------------------------------------------
  28 // wxSizerItem
  29 //---------------------------------------------------------------------------
  30
  31 wxSizerItem::wxSizerItem( int width, int height, int option, int flag, int border )
  32 {
  33     m_window = (wxWindow *) NULL;
  34     m_sizer = (wxSizer *) NULL;
  35     m_option = option;
  36     m_border = border;
  37     m_flag = flag;
  38
  39     // minimal size is the initial size
  40     m_minSize.x = width;
  41     m_minSize.y = height;
  42
  43     // size is set directly
  44     m_size = m_minSize;
  45 }
  46
  47 wxSizerItem::wxSizerItem( wxWindow *window, int option, int flag, int border )
  48 {
  49     m_window = window;
  50     m_sizer = (wxSizer *) NULL;
  51     m_option = option;
  52     m_border = border;
  53     m_flag = flag;
  54
  55     // minimal size is the initial size
  56     m_minSize = window->GetSize();
  57
  58     // size is calculated later
  59     // m_size = ...
  60 }
  61
  62 wxSizerItem::wxSizerItem( wxSizer *sizer, int option, int flag, int border )
  63 {
  64     m_window = (wxWindow *) NULL;
  65     m_sizer = sizer;
  66     m_option = option;
  67     m_border = border;
  68     m_flag = flag;
  69
  70     // minimal size is calculated later
  71     // m_minSize = ...
  72
  73     // size is calculated later
  74     // m_size = ...
  75 }
  76
  77 wxSize wxSizerItem::GetSize()
  78 {
  79     wxSize ret;
  80     if (IsSizer())
  81         ret = m_sizer->GetSize();
  82     else
  83     if (IsWindow())
  84         ret = m_window->GetSize();
  85     else ret = m_size;
  86
  87     if (m_flag & wxWEST)
  88         ret.x += m_border;
  89     if (m_flag & wxEAST)
  90         ret.x += m_border;
  91     if (m_flag & wxNORTH)
  92         ret.y += m_border;
  93     if (m_flag & wxSOUTH)
  94         ret.y += m_border;
  95
  96     return ret;
  97 }
  98
  99 wxSize wxSizerItem::CalcMin()
 100 {
 101     wxSize ret;
 102     if (IsSizer())
 103         ret = m_sizer->CalcMin();
 104 /*
 105     The minimum size of a window should be the
 106     initial size, as saved in m_minSize, not the
 107     current size.
 108
 109     else
 110     if (IsWindow())
 111         ret = m_window->GetSize();
 112 */
 113     else ret = m_minSize;
 114
 115     if (m_flag & wxWEST)
 116         ret.x += m_border;
 117     if (m_flag & wxEAST)
 118         ret.x += m_border;
 119     if (m_flag & wxNORTH)
 120         ret.y += m_border;
 121     if (m_flag & wxSOUTH)
 122         ret.y += m_border;
 123
 124     return ret;
 125 }
 126
 127 void wxSizerItem::SetDimension( wxPoint pos, wxSize size )
 128 {
 129     if (m_flag & wxWEST)
 130     {
 131         pos.x += m_border;
 132         size.x -= m_border;
 133     }
 134     if (m_flag & wxEAST)
 135     {
 136         size.x -= m_border;
 137     }
 138     if (m_flag & wxNORTH)
 139     {
 140         pos.y += m_border;
 141         size.y -= m_border;
 142     }
 143     if (m_flag & wxSOUTH)
 144     {
 145         size.y -= m_border;
 146     }
 147
 148     if (IsSizer())
 149         m_sizer->SetDimension( pos.x, pos.y, size.x, size.y );
 150
 151     if (IsWindow())
 152         m_window->SetSize( pos.x, pos.y, size.x, size.y );
 153
 154     m_size = size;
 155 }
 156
 157 bool wxSizerItem::IsWindow()
 158 {
 159     return (m_window != NULL);
 160 }
 161
 162 bool wxSizerItem::IsSizer()
 163 {
 164     return (m_sizer != NULL);
 165 }
 166
 167 bool wxSizerItem::IsSpacer()
 168 {
 169     return (m_window == NULL) && (m_sizer == NULL);
 170 }
 171
 172 //---------------------------------------------------------------------------
 173 // wxSizer
 174 //---------------------------------------------------------------------------
 175
 176 wxSizer::wxSizer()
 177 {
 178     m_children.DeleteContents( TRUE );
 179 }
 180
 181 wxSizer::~wxSizer()
 182 {
 183 }
 184
 185 void wxSizer::Add( wxWindow *window, int option, int flag, int border )
 186 {
 187     m_children.Append( new wxSizerItem( window, option, flag, border ) );
 188 }
 189
 190 void wxSizer::Add( wxSizer *sizer, int option, int flag, int border )
 191 {
 192     m_children.Append( new wxSizerItem( sizer, option, flag, border ) );
 193 }
 194
 195 void wxSizer::Add( int width, int height, int option, int flag, int border )
 196 {
 197     m_children.Append( new wxSizerItem( width, height, option, flag, border ) );
 198 }
 199
 200 void wxSizer::Prepend( wxWindow *window, int option, int flag, int border )
 201 {
 202     m_children.Insert( new wxSizerItem( window, option, flag, border ) );
 203 }
 204
 205 void wxSizer::Prepend( wxSizer *sizer, int option, int flag, int border )
 206 {
 207     m_children.Insert( new wxSizerItem( sizer, option, flag, border ) );
 208 }
 209
 210 void wxSizer::Prepend( int width, int height, int option, int flag, int border )
 211 {
 212     m_children.Insert( new wxSizerItem( width, height, option, flag, border ) );
 213 }
 214
 215 bool wxSizer::Remove( wxWindow *window )
 216 {
 217     wxASSERT( window );
 218
 219     wxNode *node = m_children.First();
 220     while (node)
 221     {
 222         wxSizerItem *item = (wxSizerItem*)node->Data();
 223         if (item->GetWindow() == window)
 224         {
 225             m_children.DeleteNode( node );
 226             return TRUE;
 227         }
 228         node = node->Next();
 229     }
 230
 231     return FALSE;
 232 }
 233
 234 bool wxSizer::Remove( wxSizer *sizer )
 235 {
 236     wxASSERT( sizer );
 237
 238     wxNode *node = m_children.First();
 239     while (node)
 240     {
 241         wxSizerItem *item = (wxSizerItem*)node->Data();
 242         if (item->GetSizer() == sizer)
 243         {
 244             m_children.DeleteNode( node );
 245             return TRUE;
 246         }
 247         node = node->Next();
 248     }
 249
 250     return FALSE;
 251 }
 252
 253 bool wxSizer::Remove( int pos )
 254 {
 255     wxNode *node = m_children.Nth( pos );
 256     if (!node) return FALSE;
 257
 258     m_children.DeleteNode( node );
 259
 260     return TRUE;
 261 }
 262
 263 void wxSizer::Fit( wxWindow *window )
 264 {
 265     window->SetSize( GetMinWindowSize( window ) );
 266 }
 267
 268 void wxSizer::Layout()
 269 {
 270     CalcMin();
 271     RecalcSizes();
 272 }
 273
 274 void wxSizer::SetSizeHints( wxWindow *window )
 275 {
 276     wxSize size( GetMinWindowSize( window ) );
 277     window->SetSizeHints( size.x, size.y );
 278 }
 279
 280 wxSize wxSizer::GetMinWindowSize( wxWindow *window )
 281 {
 282     wxSize minSize( GetMinSize() );
 283     wxSize size( window->GetSize() );
 284     wxSize client_size( window->GetClientSize() );
 285     return wxSize( minSize.x+size.x-client_size.x,
 286                    minSize.y+size.y-client_size.y );
 287 }
 288
 289 void wxSizer::SetDimension( int x, int y, int width, int height )
 290 {
 291     m_position.x = x;
 292     m_position.y = y;
 293     m_size.x = width;
 294     m_size.y = height;
 295     CalcMin();
 296     RecalcSizes();
 297 }
 298
 299 //---------------------------------------------------------------------------
 300 // wxBoxSizer
 301 //---------------------------------------------------------------------------
 302
 303 wxBoxSizer::wxBoxSizer( int orient )
 304 {
 305     m_orient = orient;
 306 }
 307
 308 void wxBoxSizer::RecalcSizes()
 309 {
 310     if (m_children.GetCount() == 0)
 311         return;
 312
 313     int delta = 0;
 314     int extra = 0;
 315     if (m_stretchable)
 316     {
 317         if (m_orient == wxHORIZONTAL)
 318         {
 319             delta = (m_size.x - m_fixedWidth) / m_stretchable;
 320             extra = (m_size.x - m_fixedWidth) % m_stretchable;
 321         }
 322         else
 323         {
 324             delta = (m_size.y - m_fixedHeight) / m_stretchable;
 325             extra = (m_size.y - m_fixedHeight) % m_stretchable;
 326         }
 327     }
 328
 329     wxPoint pt( m_position );
 330
 331     wxNode *node = m_children.GetFirst();
 332     while (node)
 333     {
 334         wxSizerItem *item = (wxSizerItem*) node->Data();
 335
 336         int weight = 1;
 337         if (item->GetOption())
 338             weight = item->GetOption();
 339
 340         wxSize size( item->CalcMin() );
 341
 342         if (m_orient == wxVERTICAL)
 343         {
 344             long height = size.y;
 345             if (item->GetOption())
 346             {
 347                 height = (delta * weight) + extra;
 348                 extra = 0; // only the first item will get the remainder as extra size
 349             }
 350
 351             wxPoint child_pos( pt );
 352             wxSize  child_size( wxSize( size.x, height) );
 353
 354             if (item->GetFlag() & wxALIGN_RIGHT)
 355               child_pos.x += m_size.x - size.x;
 356             else if (item->GetFlag() & wxCENTER)
 357               child_pos.x += (m_size.x - size.x) / 2;
 358             else if (item->GetFlag() & wxEXPAND)
 359               child_size.x = m_size.x;
 360
 361             item->SetDimension( child_pos, child_size );
 362
 363             pt.y += height;
 364         }
 365         else
 366         {
 367             long width = size.x;
 368             if (item->GetOption())
 369             {
 370                 width = (delta * weight) + extra;
 371                 extra = 0; // only the first item will get the remainder as extra size
 372             }
 373
 374             wxPoint child_pos( pt );
 375             wxSize  child_size( wxSize(width, size.y) );
 376
 377             if (item->GetFlag() & wxALIGN_BOTTOM)
 378               child_pos.y += m_size.y - size.y;
 379             else if (item->GetFlag() & wxCENTER)
 380               child_pos.y += (m_size.y - size.y) / 2;
 381             else if (item->GetFlag() & wxEXPAND)
 382               child_size.y = m_size.y;
 383
 384             item->SetDimension( child_pos, child_size );
 385
 386             pt.x += width;
 387         }
 388
 389         node = node->Next();
 390     }
 391 }
 392
 393 wxSize wxBoxSizer::CalcMin()
 394 {
 395     if (m_children.GetCount() == 0)
 396         return wxSize(2,2);
 397
 398     m_stretchable = 0;
 399     m_minWidth = 0;
 400     m_minHeight = 0;
 401     m_fixedWidth = 0;
 402     m_fixedHeight = 0;
 403
 404     wxNode *node = m_children.GetFirst();
 405     while (node)
 406     {
 407         wxSizerItem *item = (wxSizerItem*) node->Data();
 408
 409         int weight = 1;
 410         if (item->GetOption())
 411             weight = item->GetOption();
 412
 413         wxSize size( item->CalcMin() );
 414
 415         if (m_orient == wxHORIZONTAL)
 416         {
 417             m_minWidth += (size.x * weight);
 418             m_minHeight = wxMax( m_minHeight, size.y );
 419         }
 420         else
 421         {
 422             m_minHeight += (size.y * weight);
 423             m_minWidth = wxMax( m_minWidth, size.x );
 424         }
 425
 426         if (item->GetOption())
 427         {
 428             m_stretchable += weight;
 429         }
 430         else
 431         {
 432             if (m_orient == wxVERTICAL)
 433             {
 434                 m_fixedHeight += size.y;
 435                 m_fixedWidth = wxMax( m_fixedWidth, size.x );
 436             }
 437             else
 438             {
 439                 m_fixedWidth += size.x;
 440                 m_fixedHeight = wxMax( m_fixedHeight, size.y );
 441             }
 442         }
 443
 444         node = node->Next();
 445     }
 446
 447     return wxSize( m_minWidth, m_minHeight );
 448 }
 449
 450 //---------------------------------------------------------------------------
 451 // wxStaticBoxSizer
 452 //---------------------------------------------------------------------------
 453
 454 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
 455   : wxBoxSizer( orient )
 456 {
 457     wxASSERT_MSG( box, _T("wxStaticBoxSizer needs a static box") );
 458
 459     m_staticBox = box;
 460 }
 461
 462 void wxStaticBoxSizer::RecalcSizes()
 463 {
 464     // this will have to be done platform by platform
 465     // as there is no way to guess the thickness of
 466     // a wxStaticBox border
 467     int top_border = 15;
 468     if (m_staticBox->GetLabel().IsEmpty()) top_border = 5;
 469     int other_border = 5;
 470
 471     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
 472
 473     wxPoint old_pos( m_position );
 474     m_position.x += other_border;
 475     m_position.y += top_border;
 476     wxSize old_size( m_size );
 477     m_size.x -= 2*other_border;
 478     m_size.y -= top_border + other_border;
 479
 480     wxBoxSizer::RecalcSizes();
 481
 482     m_position = old_pos;
 483     m_size = old_size;
 484 }
 485
 486 wxSize wxStaticBoxSizer::CalcMin()
 487 {
 488     // this will have to be done platform by platform
 489     // as there is no way to guess the thickness of
 490     // a wxStaticBox border
 491     int top_border = 15;
 492     if (m_staticBox->GetLabel().IsEmpty()) top_border = 5;
 493     int other_border = 5;
 494
 495     wxSize ret( wxBoxSizer::CalcMin() );
 496     ret.x += 2*top_border;
 497     ret.y += other_border + top_border;
 498
 499     return ret;
 500 }