src/common/sizer.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        sizer.cpp
   3 // Purpose:     provide new wxSizer class for layounting
   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
  26 //---------------------------------------------------------------------------
  27 // wxSizerItem
  28 //---------------------------------------------------------------------------
  29
  30 wxSizerItem::wxSizerItem( int width, int height, int option, int flag, int border )
  31 {
  32     m_window = (wxWindow *) NULL;
  33     m_sizer = (wxSizer *) NULL;
  34     m_option = option;
  35     m_border = border;
  36     m_flag = flag;
  37
  38     // minimal size is the initial size
  39     m_minSize.x = width;
  40     m_minSize.y = height;
  41
  42     // size is set directly
  43     m_size = m_minSize;
  44 }
  45
  46 wxSizerItem::wxSizerItem( wxWindow *window, int option, int flag, int border )
  47 {
  48     m_window = window;
  49     m_sizer = (wxSizer *) NULL;
  50     m_option = option;
  51     m_border = border;
  52     m_flag = flag;
  53
  54     // minimal size is the initial size
  55     m_minSize = window->GetSize();
  56
  57     // size is calculated later
  58     // m_size = ...
  59 }
  60
  61 wxSizerItem::wxSizerItem( wxSizer *sizer, int option, int flag, int border )
  62 {
  63     m_window = (wxWindow *) NULL;
  64     m_sizer = sizer;
  65     m_option = option;
  66     m_border = border;
  67     m_flag = flag;
  68
  69     // minimal size is calculated later
  70     // m_minSize = ...
  71
  72     // size is calculated later
  73     // m_size = ...
  74 }
  75
  76 wxSize wxSizerItem::GetSize()
  77 {
  78     wxSize ret;
  79     if (IsSizer())
  80         ret = m_sizer->GetSize();
  81     else
  82     if (IsWindow())
  83         ret = m_window->GetSize();
  84     else ret = m_size;
  85
  86     if (m_flag & wxWEST)
  87         ret.x += m_border;
  88     if (m_flag & wxEAST)
  89         ret.x += m_border;
  90     if (m_flag & wxNORTH)
  91         ret.y += m_border;
  92     if (m_flag & wxSOUTH)
  93         ret.y += m_border;
  94
  95     return ret;
  96 }
  97
  98 wxSize wxSizerItem::CalcMin()
  99 {
 100     wxSize ret;
 101     if (IsSizer())
 102         ret = m_sizer->CalcMin();
 103 /*
 104     The minimum size of a window should be the
 105     initial size, as saved in m_minSize, not the
 106     current size.
 107
 108     else
 109     if (IsWindow())
 110         ret = m_window->GetSize();
 111 */
 112     else ret = m_minSize;
 113
 114     if (m_flag & wxWEST)
 115         ret.x += m_border;
 116     if (m_flag & wxEAST)
 117         ret.x += m_border;
 118     if (m_flag & wxNORTH)
 119         ret.y += m_border;
 120     if (m_flag & wxSOUTH)
 121         ret.y += m_border;
 122
 123     return ret;
 124 }
 125
 126 void wxSizerItem::SetDimension( wxPoint pos, wxSize size )
 127 {
 128     if (m_flag & wxWEST)
 129     {
 130         pos.x += m_border;
 131         size.x -= m_border;
 132     }
 133     if (m_flag & wxEAST)
 134     {
 135         size.x -= m_border;
 136     }
 137     if (m_flag & wxNORTH)
 138     {
 139         pos.y += m_border;
 140         size.y -= m_border;
 141     }
 142     if (m_flag & wxSOUTH)
 143     {
 144         size.y -= m_border;
 145     }
 146
 147     if (IsSizer())
 148         m_sizer->SetDimension( pos.x, pos.y, size.x, size.y );
 149
 150     if (IsWindow())
 151         m_window->SetSize( pos.x, pos.y, size.x, size.y );
 152
 153     m_size = size;
 154 }
 155
 156 bool wxSizerItem::IsWindow()
 157 {
 158     return (m_window != NULL);
 159 }
 160
 161 bool wxSizerItem::IsSizer()
 162 {
 163     return (m_sizer != NULL);
 164 }
 165
 166 bool wxSizerItem::IsSpacer()
 167 {
 168     return (m_window == NULL) && (m_sizer == NULL);
 169 }
 170
 171 //---------------------------------------------------------------------------
 172 // wxSizer
 173 //---------------------------------------------------------------------------
 174
 175 wxSizer::wxSizer()
 176 {
 177     m_children.DeleteContents( TRUE );
 178 }
 179
 180 wxSizer::~wxSizer()
 181 {
 182 }
 183
 184 void wxSizer::Add( wxWindow *window, int option, int flag, int border )
 185 {
 186     m_children.Append( new wxSizerItem( window, option, flag, border ) );
 187 }
 188
 189 void wxSizer::Add( wxSizer *sizer, int option, int flag, int border )
 190 {
 191     m_children.Append( new wxSizerItem( sizer, option, flag, border ) );
 192 }
 193
 194 void wxSizer::Add( int width, int height, int option, int flag, int border )
 195 {
 196     m_children.Append( new wxSizerItem( width, height, option, flag, border ) );
 197 }
 198
 199 void wxSizer::Fit( wxWindow *window )
 200 {
 201     window->SetSize( GetMinWindowSize( window ) );
 202 }
 203
 204 void wxSizer::Layout()
 205 {
 206     m_size = CalcMin();
 207     RecalcSizes();
 208 }
 209
 210 void wxSizer::SetSizeHints( wxWindow *window )
 211 {
 212     wxSize size( GetMinWindowSize( window ) );
 213     window->SetSizeHints( size.x, size.y );
 214 }
 215
 216 wxSize wxSizer::GetMinWindowSize( wxWindow *window )
 217 {
 218     wxSize minSize( GetMinSize() );
 219     wxSize size( window->GetSize() );
 220     wxSize client_size( window->GetClientSize() );
 221     return wxSize( minSize.x+size.x-client_size.x,
 222                    minSize.y+size.y-client_size.y );
 223 }
 224
 225 void wxSizer::SetDimension( int x, int y, int width, int height )
 226 {
 227     m_position.x = x;
 228     m_position.y = y;
 229     m_size.x = width;
 230     m_size.y = height;
 231     RecalcSizes();
 232 }
 233
 234 //---------------------------------------------------------------------------
 235 // wxBox
 236 //---------------------------------------------------------------------------
 237
 238 wxBox::wxBox( int orient )
 239 {
 240     m_orient = orient;
 241 }
 242
 243 void wxBox::RecalcSizes()
 244 {
 245     if (m_children.GetCount() == 0)
 246     {
 247         SetDimension( m_position.x, m_position.y, 2, 2 );
 248         return;
 249     }
 250
 251     int delta = 0;
 252     int extra = 0;
 253     if (m_stretchable)
 254     {
 255         if (m_orient == wxHORIZONTAL)
 256         {
 257             delta = (m_size.x - m_fixedWidth) / m_stretchable;
 258             extra = (m_size.x - m_fixedWidth) % m_stretchable;
 259         }
 260         else
 261         {
 262             delta = (m_size.y - m_fixedHeight) / m_stretchable;
 263             extra = (m_size.y - m_fixedHeight) % m_stretchable;
 264         }
 265     }
 266
 267     wxPoint pt( m_position );
 268
 269     wxNode *node = m_children.GetFirst();
 270     while (node)
 271     {
 272         wxSizerItem *item = (wxSizerItem*) node->Data();
 273
 274         int weight = 1;
 275         if (item->GetOption())
 276             weight = item->GetOption();
 277
 278         wxSize size( item->CalcMin() );
 279
 280         if (m_orient == wxVERTICAL)
 281         {
 282             long height = size.y;
 283             if (item->GetOption())
 284             {
 285                 height = (delta * weight) + extra;
 286                 extra = 0; // only the first item will get the remainder as extra size
 287             }
 288
 289             wxPoint child_pos( pt );
 290             wxSize  child_size( wxSize( size.x, height) );
 291
 292             if (item->GetFlag() & wxALIGN_RIGHT)
 293               child_pos.x += m_size.x - size.x;
 294             else if (item->GetFlag() & wxCENTER)
 295               child_pos.x += (m_size.x - size.x) / 2;
 296             else if (item->GetFlag() & wxEXPAND)
 297               child_size.x = m_size.x;
 298
 299             item->SetDimension( child_pos, child_size );
 300
 301             pt.y += height;
 302         }
 303         else
 304         {
 305             long width = size.x;
 306             if (item->GetOption())
 307             {
 308                 width = (delta * weight) + extra;
 309                 extra = 0; // only the first item will get the remainder as extra size
 310             }
 311
 312             wxPoint child_pos( pt );
 313             wxSize  child_size( wxSize(width, size.y) );
 314
 315             if (item->GetFlag() & wxALIGN_BOTTOM)
 316               child_pos.y += m_size.y - size.y;
 317             else if (item->GetFlag() & wxCENTER)
 318               child_pos.y += (m_size.y - size.y) / 2;
 319             else if (item->GetFlag() & wxEXPAND)
 320               child_size.y = m_size.y;
 321
 322             item->SetDimension( child_pos, child_size );
 323
 324             pt.x += width;
 325         }
 326
 327         node = node->Next();
 328     }
 329 }
 330
 331 wxSize wxBox::CalcMin()
 332 {
 333     if (m_children.GetCount() == 0)
 334         return wxSize(2,2);
 335
 336     m_stretchable = 0;
 337     m_minWidth = 0;
 338     m_minHeight = 0;
 339     m_fixedWidth = 0;
 340     m_fixedHeight = 0;
 341
 342     wxNode *node = m_children.GetFirst();
 343     while (node)
 344     {
 345         wxSizerItem *item = (wxSizerItem*) node->Data();
 346
 347         int weight = 1;
 348         if (item->GetOption())
 349             weight = item->GetOption();
 350
 351         wxSize size( item->CalcMin() );
 352
 353         if (m_orient == wxHORIZONTAL)
 354         {
 355             m_minWidth += (size.x * weight);
 356             m_minHeight = wxMax( m_minHeight, size.y );
 357         }
 358         else
 359         {
 360             m_minHeight += (size.y * weight);
 361             m_minWidth = wxMax( m_minWidth, size.x );
 362         }
 363
 364         if (item->GetOption())
 365         {
 366             m_stretchable += weight;
 367         }
 368         else
 369         {
 370             if (m_orient == wxVERTICAL)
 371             {
 372                 m_fixedHeight += size.y;
 373                 m_fixedWidth = wxMax( m_fixedWidth, size.x );
 374             }
 375             else
 376             {
 377                 m_fixedWidth += size.x;
 378                 m_fixedHeight = wxMax( m_fixedHeight, size.y );
 379             }
 380         }
 381
 382         node = node->Next();
 383     }
 384
 385     return wxSize( m_minWidth, m_minHeight );
 386 }