include/wx/sizer.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/sizer.h
   3 // Purpose:     provide wxSizer class for layout
   4 // Author:      Robert Roebling and Robin Dunn
   5 // Modified by: Ron Lee, Vadim Zeitlin (wxSizerFlags)
   6 // Created:
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Robin Dunn, Robert Roebling
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef __WXSIZER_H__
  13 #define __WXSIZER_H__
  14
  15 #include "wx/defs.h"
  16
  17 #include "wx/window.h"
  18
  19 //---------------------------------------------------------------------------
  20 // classes
  21 //---------------------------------------------------------------------------
  22
  23 class WXDLLIMPEXP_FWD_CORE wxButton;
  24 class WXDLLIMPEXP_FWD_CORE wxBoxSizer;
  25 class WXDLLIMPEXP_FWD_CORE wxSizerItem;
  26 class WXDLLIMPEXP_FWD_CORE wxSizer;
  27
  28 #ifndef wxUSE_BORDER_BY_DEFAULT
  29     #ifdef __SMARTPHONE__
  30         // no borders by default on limited size screen
  31         #define wxUSE_BORDER_BY_DEFAULT 0
  32     #else
  33         #define wxUSE_BORDER_BY_DEFAULT 1
  34     #endif
  35 #endif
  36
  37 // ----------------------------------------------------------------------------
  38 // wxSizerFlags: flags used for an item in the sizer
  39 // ----------------------------------------------------------------------------
  40
  41 class WXDLLIMPEXP_CORE wxSizerFlags
  42 {
  43 public:
  44     // construct the flags object initialized with the given proportion (0 by
  45     // default)
  46     wxSizerFlags(int proportion = 0) : m_proportion(proportion)
  47     {
  48         m_flags = 0;
  49         m_borderInPixels = 0;
  50     }
  51
  52     // setters for all sizer flags, they all return the object itself so that
  53     // calls to them can be chained
  54
  55     wxSizerFlags& Proportion(int proportion)
  56     {
  57         m_proportion = proportion;
  58         return *this;
  59     }
  60
  61     wxSizerFlags& Expand()
  62     {
  63         m_flags |= wxEXPAND;
  64         return *this;
  65     }
  66
  67     // notice that Align() replaces the current alignment flags, use specific
  68     // methods below such as Top(), Left() &c if you want to set just the
  69     // vertical or horizontal alignment
  70     wxSizerFlags& Align(int alignment) // combination of wxAlignment values
  71     {
  72         m_flags &= ~wxALIGN_MASK;
  73         m_flags |= alignment;
  74
  75         return *this;
  76     }
  77
  78     // some shortcuts for Align()
  79     wxSizerFlags& Centre() { return Align(wxALIGN_CENTRE); }
  80     wxSizerFlags& Center() { return Centre(); }
  81
  82     wxSizerFlags& Top()
  83     {
  84         m_flags &= ~(wxALIGN_BOTTOM | wxALIGN_CENTRE_VERTICAL);
  85         return *this;
  86     }
  87
  88     wxSizerFlags& Left()
  89     {
  90         m_flags &= ~(wxALIGN_RIGHT | wxALIGN_CENTRE_HORIZONTAL);
  91         return *this;
  92     }
  93
  94     wxSizerFlags& Right()
  95     {
  96         m_flags = (m_flags & ~wxALIGN_CENTRE_HORIZONTAL) | wxALIGN_RIGHT;
  97         return *this;
  98     }
  99
 100     wxSizerFlags& Bottom()
 101     {
 102         m_flags = (m_flags & ~wxALIGN_CENTRE_VERTICAL) | wxALIGN_BOTTOM;
 103         return *this;
 104     }
 105
 106
 107     // default border size used by Border() below
 108     static int GetDefaultBorder()
 109     {
 110 #if wxUSE_BORDER_BY_DEFAULT
 111     #ifdef __WXGTK20__
 112         // GNOME HIG says to use 6px as the base unit:
 113         // http://library.gnome.org/devel/hig-book/stable/design-window.html.en
 114         return 6;
 115     #else
 116         // FIXME: default border size shouldn't be hardcoded and at the very
 117         //        least they should depend on the current font size
 118         return 5;
 119     #endif
 120 #else
 121         return 0;
 122 #endif
 123     }
 124
 125
 126     wxSizerFlags& Border(int direction, int borderInPixels)
 127     {
 128         m_flags &= ~wxALL;
 129         m_flags |= direction;
 130
 131         m_borderInPixels = borderInPixels;
 132
 133         return *this;
 134     }
 135
 136     wxSizerFlags& Border(int direction = wxALL)
 137     {
 138 #if wxUSE_BORDER_BY_DEFAULT
 139         return Border(direction, GetDefaultBorder());
 140 #else
 141         // no borders by default on limited size screen
 142         wxUnusedVar(direction);
 143
 144         return *this;
 145 #endif
 146     }
 147
 148     wxSizerFlags& DoubleBorder(int direction = wxALL)
 149     {
 150 #if wxUSE_BORDER_BY_DEFAULT
 151         return Border(direction, 2*GetDefaultBorder());
 152 #else
 153         wxUnusedVar(direction);
 154
 155         return *this;
 156 #endif
 157     }
 158
 159     wxSizerFlags& TripleBorder(int direction = wxALL)
 160     {
 161 #if wxUSE_BORDER_BY_DEFAULT
 162         return Border(direction, 3*GetDefaultBorder());
 163 #else
 164         wxUnusedVar(direction);
 165
 166         return *this;
 167 #endif
 168     }
 169
 170     wxSizerFlags& HorzBorder()
 171     {
 172 #if wxUSE_BORDER_BY_DEFAULT
 173         return Border(wxLEFT | wxRIGHT, GetDefaultBorder());
 174 #else
 175         return *this;
 176 #endif
 177     }
 178
 179     wxSizerFlags& DoubleHorzBorder()
 180     {
 181 #if wxUSE_BORDER_BY_DEFAULT
 182         return Border(wxLEFT | wxRIGHT, 2*GetDefaultBorder());
 183 #else
 184         return *this;
 185 #endif
 186     }
 187
 188     // setters for the others flags
 189     wxSizerFlags& Shaped()
 190     {
 191         m_flags |= wxSHAPED;
 192
 193         return *this;
 194     }
 195
 196     wxSizerFlags& FixedMinSize()
 197     {
 198         m_flags |= wxFIXED_MINSIZE;
 199
 200         return *this;
 201     }
 202
 203     // makes the item ignore window's visibility status
 204     wxSizerFlags& ReserveSpaceEvenIfHidden()
 205     {
 206         m_flags |= wxRESERVE_SPACE_EVEN_IF_HIDDEN;
 207         return *this;
 208     }
 209
 210     // accessors for wxSizer only
 211     int GetProportion() const { return m_proportion; }
 212     int GetFlags() const { return m_flags; }
 213     int GetBorderInPixels() const { return m_borderInPixels; }
 214
 215 private:
 216     int m_proportion;
 217     int m_flags;
 218     int m_borderInPixels;
 219 };
 220
 221
 222 // ----------------------------------------------------------------------------
 223 // wxSizerSpacer: used by wxSizerItem to represent a spacer
 224 // ----------------------------------------------------------------------------
 225
 226 class WXDLLIMPEXP_CORE wxSizerSpacer
 227 {
 228 public:
 229     wxSizerSpacer(const wxSize& size) : m_size(size), m_isShown(true) { }
 230
 231     void SetSize(const wxSize& size) { m_size = size; }
 232     const wxSize& GetSize() const { return m_size; }
 233
 234     void Show(bool show) { m_isShown = show; }
 235     bool IsShown() const { return m_isShown; }
 236
 237 private:
 238     // the size, in pixel
 239     wxSize m_size;
 240
 241     // is the spacer currently shown?
 242     bool m_isShown;
 243 };
 244
 245 // ----------------------------------------------------------------------------
 246 // wxSizerItem
 247 // ----------------------------------------------------------------------------
 248
 249 class WXDLLIMPEXP_CORE wxSizerItem : public wxObject
 250 {
 251 public:
 252     // window
 253     wxSizerItem( wxWindow *window,
 254                  int proportion,
 255                  int flag,
 256                  int border,
 257                  wxObject* userData );
 258
 259     // window with flags
 260     wxSizerItem(wxWindow *window, const wxSizerFlags& flags)
 261     {
 262         Init(flags);
 263
 264         DoSetWindow(window);
 265     }
 266
 267     // subsizer
 268     wxSizerItem( wxSizer *sizer,
 269                  int proportion,
 270                  int flag,
 271                  int border,
 272                  wxObject* userData );
 273
 274     // sizer with flags
 275     wxSizerItem(wxSizer *sizer, const wxSizerFlags& flags)
 276     {
 277         Init(flags);
 278
 279         DoSetSizer(sizer);
 280     }
 281
 282     // spacer
 283     wxSizerItem( int width,
 284                  int height,
 285                  int proportion,
 286                  int flag,
 287                  int border,
 288                  wxObject* userData);
 289
 290     // spacer with flags
 291     wxSizerItem(int width, int height, const wxSizerFlags& flags)
 292     {
 293         Init(flags);
 294
 295         DoSetSpacer(wxSize(width, height));
 296     }
 297
 298     wxSizerItem();
 299     virtual ~wxSizerItem();
 300
 301     virtual void DeleteWindows();
 302
 303     // Enable deleting the SizerItem without destroying the contained sizer.
 304     void DetachSizer() { m_sizer = NULL; }
 305
 306     virtual wxSize GetSize() const;
 307     virtual wxSize CalcMin();
 308     virtual void SetDimension( const wxPoint& pos, const wxSize& size );
 309
 310     wxSize GetMinSize() const
 311         { return m_minSize; }
 312     wxSize GetMinSizeWithBorder() const;
 313
 314     void SetMinSize(const wxSize& size)
 315     {
 316         if ( IsWindow() )
 317             m_window->SetMinSize(size);
 318         m_minSize = size;
 319     }
 320     void SetMinSize( int x, int y )
 321         { SetMinSize(wxSize(x, y)); }
 322     void SetInitSize( int x, int y )
 323         { SetMinSize(wxSize(x, y)); }
 324
 325     // if either of dimensions is zero, ratio is assumed to be 1
 326     // to avoid "divide by zero" errors
 327     void SetRatio(int width, int height)
 328         { m_ratio = (width && height) ? ((float) width / (float) height) : 1; }
 329     void SetRatio(const wxSize& size)
 330         { SetRatio(size.x, size.y); }
 331     void SetRatio(float ratio)
 332         { m_ratio = ratio; }
 333     float GetRatio() const
 334         { return m_ratio; }
 335
 336     virtual wxRect GetRect() { return m_rect; }
 337
 338     // set a sizer item id (different from a window id, all sizer items,
 339     // including spacers, can have an associated id)
 340     void SetId(int id) { m_id = id; }
 341     int GetId() const { return m_id; }
 342
 343     bool IsWindow() const { return m_kind == Item_Window; }
 344     bool IsSizer() const { return m_kind == Item_Sizer; }
 345     bool IsSpacer() const { return m_kind == Item_Spacer; }
 346
 347 #if WXWIN_COMPATIBILITY_2_6
 348     // Deprecated in 2.6, use {G,S}etProportion instead.
 349     wxDEPRECATED( void SetOption( int option ) );
 350     wxDEPRECATED( int GetOption() const );
 351 #endif // WXWIN_COMPATIBILITY_2_6
 352
 353     void SetProportion( int proportion )
 354         { m_proportion = proportion; }
 355     int GetProportion() const
 356         { return m_proportion; }
 357     void SetFlag( int flag )
 358         { m_flag = flag; }
 359     int GetFlag() const
 360         { return m_flag; }
 361     void SetBorder( int border )
 362         { m_border = border; }
 363     int GetBorder() const
 364         { return m_border; }
 365
 366     wxWindow *GetWindow() const
 367         { return m_kind == Item_Window ? m_window : NULL; }
 368     wxSizer *GetSizer() const
 369         { return m_kind == Item_Sizer ? m_sizer : NULL; }
 370     wxSize GetSpacer() const;
 371
 372     // This function behaves obviously for the windows and spacers but for the
 373     // sizers it returns true if any sizer element is shown and only returns
 374     // false if all of them are hidden. Also, it always returns true if
 375     // wxRESERVE_SPACE_EVEN_IF_HIDDEN flag was used.
 376     bool IsShown() const;
 377
 378     void Show(bool show);
 379
 380     void SetUserData(wxObject* userData)
 381         { delete m_userData; m_userData = userData; }
 382     wxObject* GetUserData() const
 383         { return m_userData; }
 384     wxPoint GetPosition() const
 385         { return m_pos; }
 386
 387     // Called once the first component of an item has been decided. This is
 388     // used in algorithms that depend on knowing the size in one direction
 389     // before the min size in the other direction can be known.
 390     // Returns true if it made use of the information (and min size was changed).
 391     bool InformFirstDirection( int direction, int size, int availableOtherDir=-1 );
 392
 393     // these functions delete the current contents of the item if it's a sizer
 394     // or a spacer but not if it is a window
 395     void AssignWindow(wxWindow *window)
 396     {
 397         Free();
 398         DoSetWindow(window);
 399     }
 400
 401     void AssignSizer(wxSizer *sizer)
 402     {
 403         Free();
 404         DoSetSizer(sizer);
 405     }
 406
 407     void AssignSpacer(const wxSize& size)
 408     {
 409         Free();
 410         DoSetSpacer(size);
 411     }
 412
 413     void AssignSpacer(int w, int h) { AssignSpacer(wxSize(w, h)); }
 414
 415 #if WXWIN_COMPATIBILITY_2_8
 416     // these functions do not free the old sizer/spacer and so can easily
 417     // provoke the memory leaks and so shouldn't be used, use Assign() instead
 418     wxDEPRECATED( void SetWindow(wxWindow *window) );
 419     wxDEPRECATED( void SetSizer(wxSizer *sizer) );
 420     wxDEPRECATED( void SetSpacer(const wxSize& size) );
 421     wxDEPRECATED( void SetSpacer(int width, int height) );
 422 #endif // WXWIN_COMPATIBILITY_2_8
 423
 424 protected:
 425     // common part of several ctors
 426     void Init() { m_userData = NULL; m_kind = Item_None; }
 427
 428     // common part of ctors taking wxSizerFlags
 429     void Init(const wxSizerFlags& flags);
 430
 431     // free current contents
 432     void Free();
 433
 434     // common parts of Set/AssignXXX()
 435     void DoSetWindow(wxWindow *window);
 436     void DoSetSizer(wxSizer *sizer);
 437     void DoSetSpacer(const wxSize& size);
 438
 439     // discriminated union: depending on m_kind one of the fields is valid
 440     enum
 441     {
 442         Item_None,
 443         Item_Window,
 444         Item_Sizer,
 445         Item_Spacer,
 446         Item_Max
 447     } m_kind;
 448     union
 449     {
 450         wxWindow      *m_window;
 451         wxSizer       *m_sizer;
 452         wxSizerSpacer *m_spacer;
 453     };
 454
 455     wxPoint      m_pos;
 456     wxSize       m_minSize;
 457     int          m_proportion;
 458     int          m_border;
 459     int          m_flag;
 460     int          m_id;
 461
 462     // on screen rectangle of this item (not including borders)
 463     wxRect       m_rect;
 464
 465     // Aspect ratio can always be calculated from m_size,
 466     // but this would cause precision loss when the window
 467     // is shrunk.  It is safer to preserve the initial value.
 468     float        m_ratio;
 469
 470     wxObject    *m_userData;
 471
 472 private:
 473     DECLARE_CLASS(wxSizerItem)
 474     wxDECLARE_NO_COPY_CLASS(wxSizerItem);
 475 };
 476
 477 WX_DECLARE_EXPORTED_LIST( wxSizerItem, wxSizerItemList );
 478
 479
 480 //---------------------------------------------------------------------------
 481 // wxSizer
 482 //---------------------------------------------------------------------------
 483
 484 class WXDLLIMPEXP_CORE wxSizer: public wxObject, public wxClientDataContainer
 485 {
 486 public:
 487     wxSizer() { m_containingWindow = NULL; }
 488     virtual ~wxSizer();
 489
 490     // methods for adding elements to the sizer: there are Add/Insert/Prepend
 491     // overloads for each of window/sizer/spacer/wxSizerItem
 492     wxSizerItem* Add(wxWindow *window,
 493                      int proportion = 0,
 494                      int flag = 0,
 495                      int border = 0,
 496                      wxObject* userData = NULL);
 497     wxSizerItem* Add(wxSizer *sizer,
 498                      int proportion = 0,
 499                      int flag = 0,
 500                      int border = 0,
 501                      wxObject* userData = NULL);
 502     wxSizerItem* Add(int width,
 503                      int height,
 504                      int proportion = 0,
 505                      int flag = 0,
 506                      int border = 0,
 507                      wxObject* userData = NULL);
 508     wxSizerItem* Add( wxWindow *window, const wxSizerFlags& flags);
 509     wxSizerItem* Add( wxSizer *sizer, const wxSizerFlags& flags);
 510     wxSizerItem* Add( int width, int height, const wxSizerFlags& flags);
 511     wxSizerItem* Add( wxSizerItem *item);
 512
 513     virtual wxSizerItem *AddSpacer(int size);
 514     wxSizerItem* AddStretchSpacer(int prop = 1);
 515
 516     wxSizerItem* Insert(size_t index,
 517                         wxWindow *window,
 518                         int proportion = 0,
 519                         int flag = 0,
 520                         int border = 0,
 521                         wxObject* userData = NULL);
 522     wxSizerItem* Insert(size_t index,
 523                         wxSizer *sizer,
 524                         int proportion = 0,
 525                         int flag = 0,
 526                         int border = 0,
 527                         wxObject* userData = NULL);
 528     wxSizerItem* Insert(size_t index,
 529                         int width,
 530                         int height,
 531                         int proportion = 0,
 532                         int flag = 0,
 533                         int border = 0,
 534                         wxObject* userData = NULL);
 535     wxSizerItem* Insert(size_t index,
 536                         wxWindow *window,
 537                         const wxSizerFlags& flags);
 538     wxSizerItem* Insert(size_t index,
 539                         wxSizer *sizer,
 540                         const wxSizerFlags& flags);
 541     wxSizerItem* Insert(size_t index,
 542                         int width,
 543                         int height,
 544                         const wxSizerFlags& flags);
 545
 546     // NB: do _not_ override this function in the derived classes, this one is
 547     //     virtual for compatibility reasons only to allow old code overriding
 548     //     it to continue to work, override DoInsert() instead in the new code
 549     virtual wxSizerItem* Insert(size_t index, wxSizerItem *item);
 550
 551     wxSizerItem* InsertSpacer(size_t index, int size);
 552     wxSizerItem* InsertStretchSpacer(size_t index, int prop = 1);
 553
 554     wxSizerItem* Prepend(wxWindow *window,
 555                          int proportion = 0,
 556                          int flag = 0,
 557                          int border = 0,
 558                          wxObject* userData = NULL);
 559     wxSizerItem* Prepend(wxSizer *sizer,
 560                          int proportion = 0,
 561                          int flag = 0,
 562                          int border = 0,
 563                          wxObject* userData = NULL);
 564     wxSizerItem* Prepend(int width,
 565                          int height,
 566                          int proportion = 0,
 567                          int flag = 0,
 568                          int border = 0,
 569                          wxObject* userData = NULL);
 570     wxSizerItem* Prepend(wxWindow *window, const wxSizerFlags& flags);
 571     wxSizerItem* Prepend(wxSizer *sizer, const wxSizerFlags& flags);
 572     wxSizerItem* Prepend(int width, int height, const wxSizerFlags& flags);
 573     wxSizerItem* Prepend(wxSizerItem *item);
 574
 575     wxSizerItem* PrependSpacer(int size);
 576     wxSizerItem* PrependStretchSpacer(int prop = 1);
 577
 578     // set (or possibly unset if window is NULL) or get the window this sizer
 579     // is used in
 580     void SetContainingWindow(wxWindow *window);
 581     wxWindow *GetContainingWindow() const { return m_containingWindow; }
 582
 583 #if WXWIN_COMPATIBILITY_2_6
 584     // Deprecated in 2.6 since historically it does not delete the window,
 585     // use Detach instead.
 586     wxDEPRECATED( virtual bool Remove( wxWindow *window ) );
 587 #endif // WXWIN_COMPATIBILITY_2_6
 588
 589     virtual bool Remove( wxSizer *sizer );
 590     virtual bool Remove( int index );
 591
 592     virtual bool Detach( wxWindow *window );
 593     virtual bool Detach( wxSizer *sizer );
 594     virtual bool Detach( int index );
 595
 596     virtual bool Replace( wxWindow *oldwin, wxWindow *newwin, bool recursive = false );
 597     virtual bool Replace( wxSizer *oldsz, wxSizer *newsz, bool recursive = false );
 598     virtual bool Replace( size_t index, wxSizerItem *newitem );
 599
 600     virtual void Clear( bool delete_windows = false );
 601     virtual void DeleteWindows();
 602
 603     // Inform sizer about the first direction that has been decided (by parent item)
 604     // Returns true if it made use of the informtion (and recalculated min size)
 605     virtual bool InformFirstDirection( int WXUNUSED(direction), int WXUNUSED(size), int WXUNUSED(availableOtherDir) )
 606         { return false; }
 607
 608     void SetMinSize( int width, int height )
 609         { DoSetMinSize( width, height ); }
 610     void SetMinSize( const wxSize& size )
 611         { DoSetMinSize( size.x, size.y ); }
 612
 613     // Searches recursively
 614     bool SetItemMinSize( wxWindow *window, int width, int height )
 615         { return DoSetItemMinSize( window, width, height ); }
 616     bool SetItemMinSize( wxWindow *window, const wxSize& size )
 617         { return DoSetItemMinSize( window, size.x, size.y ); }
 618
 619     // Searches recursively
 620     bool SetItemMinSize( wxSizer *sizer, int width, int height )
 621         { return DoSetItemMinSize( sizer, width, height ); }
 622     bool SetItemMinSize( wxSizer *sizer, const wxSize& size )
 623         { return DoSetItemMinSize( sizer, size.x, size.y ); }
 624
 625     bool SetItemMinSize( size_t index, int width, int height )
 626         { return DoSetItemMinSize( index, width, height ); }
 627     bool SetItemMinSize( size_t index, const wxSize& size )
 628         { return DoSetItemMinSize( index, size.x, size.y ); }
 629
 630     wxSize GetSize() const
 631         { return m_size; }
 632     wxPoint GetPosition() const
 633         { return m_position; }
 634
 635     // Calculate the minimal size or return m_minSize if bigger.
 636     wxSize GetMinSize();
 637
 638     // These virtual functions are used by the layout algorithm: first
 639     // CalcMin() is called to calculate the minimal size of the sizer and
 640     // prepare for laying it out and then RecalcSizes() is called to really
 641     // update all the sizer items
 642     virtual wxSize CalcMin() = 0;
 643     virtual void RecalcSizes() = 0;
 644
 645     virtual void Layout();
 646
 647     wxSize ComputeFittingClientSize(wxWindow *window);
 648     wxSize ComputeFittingWindowSize(wxWindow *window);
 649
 650     wxSize Fit( wxWindow *window );
 651     void FitInside( wxWindow *window );
 652     void SetSizeHints( wxWindow *window );
 653 #if WXWIN_COMPATIBILITY_2_8
 654     // This only calls FitInside() since 2.9
 655     wxDEPRECATED( void SetVirtualSizeHints( wxWindow *window ) );
 656 #endif
 657
 658     wxSizerItemList& GetChildren()
 659         { return m_children; }
 660     const wxSizerItemList& GetChildren() const
 661         { return m_children; }
 662
 663     void SetDimension(const wxPoint& pos, const wxSize& size)
 664     {
 665         m_position = pos;
 666         m_size = size;
 667         Layout();
 668     }
 669     void SetDimension(int x, int y, int width, int height)
 670         { SetDimension(wxPoint(x, y), wxSize(width, height)); }
 671
 672     size_t GetItemCount() const { return m_children.GetCount(); }
 673     bool IsEmpty() const { return m_children.IsEmpty(); }
 674
 675     wxSizerItem* GetItem( wxWindow *window, bool recursive = false );
 676     wxSizerItem* GetItem( wxSizer *sizer, bool recursive = false );
 677     wxSizerItem* GetItem( size_t index );
 678     wxSizerItem* GetItemById( int id, bool recursive = false );
 679
 680     // Manage whether individual scene items are considered
 681     // in the layout calculations or not.
 682     bool Show( wxWindow *window, bool show = true, bool recursive = false );
 683     bool Show( wxSizer *sizer, bool show = true, bool recursive = false );
 684     bool Show( size_t index, bool show = true );
 685
 686     bool Hide( wxSizer *sizer, bool recursive = false )
 687         { return Show( sizer, false, recursive ); }
 688     bool Hide( wxWindow *window, bool recursive = false )
 689         { return Show( window, false, recursive ); }
 690     bool Hide( size_t index )
 691         { return Show( index, false ); }
 692
 693     bool IsShown( wxWindow *window ) const;
 694     bool IsShown( wxSizer *sizer ) const;
 695     bool IsShown( size_t index ) const;
 696
 697     // Recursively call wxWindow::Show () on all sizer items.
 698     virtual void ShowItems (bool show);
 699
 700     void Show(bool show) { ShowItems(show); }
 701
 702 protected:
 703     wxSize              m_size;
 704     wxSize              m_minSize;
 705     wxPoint             m_position;
 706     wxSizerItemList     m_children;
 707
 708     // the window this sizer is used in, can be NULL
 709     wxWindow *m_containingWindow;
 710
 711     wxSize GetMaxClientSize( wxWindow *window ) const;
 712     wxSize GetMinClientSize( wxWindow *window );
 713     wxSize VirtualFitSize( wxWindow *window );
 714
 715     virtual void DoSetMinSize( int width, int height );
 716     virtual bool DoSetItemMinSize( wxWindow *window, int width, int height );
 717     virtual bool DoSetItemMinSize( wxSizer *sizer, int width, int height );
 718     virtual bool DoSetItemMinSize( size_t index, int width, int height );
 719
 720     // insert a new item into m_children at given index and return the item
 721     // itself
 722     virtual wxSizerItem* DoInsert(size_t index, wxSizerItem *item);
 723
 724 private:
 725     DECLARE_CLASS(wxSizer)
 726 };
 727
 728 //---------------------------------------------------------------------------
 729 // wxGridSizer
 730 //---------------------------------------------------------------------------
 731
 732 class WXDLLIMPEXP_CORE wxGridSizer: public wxSizer
 733 {
 734 public:
 735     // ctors specifying the number of columns only: number of rows will be
 736     // deduced automatically depending on the number of sizer elements
 737     wxGridSizer( int cols, int vgap, int hgap );
 738     wxGridSizer( int cols, const wxSize& gap = wxSize(0, 0) );
 739
 740     // ctors specifying the number of rows and columns
 741     wxGridSizer( int rows, int cols, int vgap, int hgap );
 742     wxGridSizer( int rows, int cols, const wxSize& gap );
 743
 744     virtual void RecalcSizes();
 745     virtual wxSize CalcMin();
 746
 747     void SetCols( int cols )
 748     {
 749         wxASSERT_MSG( cols >= 0, "Number of columns must be non-negative");
 750         m_cols = cols;
 751     }
 752
 753     void SetRows( int rows )
 754     {
 755         wxASSERT_MSG( rows >= 0, "Number of rows must be non-negative");
 756         m_rows = rows;
 757     }
 758
 759     void SetVGap( int gap )     { m_vgap = gap; }
 760     void SetHGap( int gap )     { m_hgap = gap; }
 761     int GetCols() const         { return m_cols; }
 762     int GetRows() const         { return m_rows; }
 763     int GetVGap() const         { return m_vgap; }
 764     int GetHGap() const         { return m_hgap; }
 765
 766     int GetEffectiveColsCount() const   { return m_cols ? m_cols : CalcCols(); }
 767     int GetEffectiveRowsCount() const   { return m_rows ? m_rows : CalcRows(); }
 768
 769     // return the number of total items and the number of columns and rows
 770     // (for internal use only)
 771     int CalcRowsCols(int& rows, int& cols) const;
 772
 773 protected:
 774     // the number of rows/columns in the sizer, if 0 then it is determined
 775     // dynamically depending on the total number of items
 776     int    m_rows;
 777     int    m_cols;
 778
 779     // gaps between rows and columns
 780     int    m_vgap;
 781     int    m_hgap;
 782
 783     virtual wxSizerItem *DoInsert(size_t index, wxSizerItem *item);
 784
 785     void SetItemBounds( wxSizerItem *item, int x, int y, int w, int h );
 786
 787     // returns the number of columns/rows needed for the current total number
 788     // of children (and the fixed number of rows/columns)
 789     int CalcCols() const
 790     {
 791         wxCHECK_MSG
 792         (
 793             m_rows, 0,
 794             "Can't calculate number of cols if number of rows is not specified"
 795         );
 796
 797         return (m_children.GetCount() + m_rows - 1) / m_rows;
 798     }
 799
 800     int CalcRows() const
 801     {
 802         wxCHECK_MSG
 803         (
 804             m_cols, 0,
 805             "Can't calculate number of cols if number of rows is not specified"
 806         );
 807
 808         return (m_children.GetCount() + m_cols - 1) / m_cols;
 809     }
 810
 811 private:
 812     DECLARE_CLASS(wxGridSizer)
 813 };
 814
 815 //---------------------------------------------------------------------------
 816 // wxFlexGridSizer
 817 //---------------------------------------------------------------------------
 818
 819 // values which define the behaviour for resizing wxFlexGridSizer cells in the
 820 // "non-flexible" direction
 821 enum wxFlexSizerGrowMode
 822 {
 823     // don't resize the cells in non-flexible direction at all
 824     wxFLEX_GROWMODE_NONE,
 825
 826     // uniformly resize only the specified ones (default)
 827     wxFLEX_GROWMODE_SPECIFIED,
 828
 829     // uniformly resize all cells
 830     wxFLEX_GROWMODE_ALL
 831 };
 832
 833 class WXDLLIMPEXP_CORE wxFlexGridSizer: public wxGridSizer
 834 {
 835 public:
 836     // ctors specifying the number of columns only: number of rows will be
 837     // deduced automatically depending on the number of sizer elements
 838     wxFlexGridSizer( int cols, int vgap, int hgap );
 839     wxFlexGridSizer( int cols, const wxSize& gap = wxSize(0, 0) );
 840
 841     // ctors specifying the number of rows and columns
 842     wxFlexGridSizer( int rows, int cols, int vgap, int hgap );
 843     wxFlexGridSizer( int rows, int cols, const wxSize& gap );
 844
 845     // dtor
 846     virtual ~wxFlexGridSizer();
 847
 848     // set the rows/columns which will grow (the others will remain of the
 849     // constant initial size)
 850     void AddGrowableRow( size_t idx, int proportion = 0 );
 851     void RemoveGrowableRow( size_t idx );
 852     void AddGrowableCol( size_t idx, int proportion = 0 );
 853     void RemoveGrowableCol( size_t idx );
 854
 855     bool IsRowGrowable( size_t idx );
 856     bool IsColGrowable( size_t idx );
 857
 858     // the sizer cells may grow in both directions, not grow at all or only
 859     // grow in one direction but not the other
 860
 861     // the direction may be wxVERTICAL, wxHORIZONTAL or wxBOTH (default)
 862     void SetFlexibleDirection(int direction) { m_flexDirection = direction; }
 863     int GetFlexibleDirection() const { return m_flexDirection; }
 864
 865     // note that the grow mode only applies to the direction which is not
 866     // flexible
 867     void SetNonFlexibleGrowMode(wxFlexSizerGrowMode mode) { m_growMode = mode; }
 868     wxFlexSizerGrowMode GetNonFlexibleGrowMode() const { return m_growMode; }
 869
 870     // Read-only access to the row heights and col widths arrays
 871     const wxArrayInt& GetRowHeights() const { return m_rowHeights; }
 872     const wxArrayInt& GetColWidths() const  { return m_colWidths; }
 873
 874     // implementation
 875     virtual void RecalcSizes();
 876     virtual wxSize CalcMin();
 877
 878 protected:
 879     void AdjustForFlexDirection();
 880     void AdjustForGrowables(const wxSize& sz);
 881     void FindWidthsAndHeights(int nrows, int ncols);
 882
 883     // the heights/widths of all rows/columns
 884     wxArrayInt  m_rowHeights,
 885                 m_colWidths;
 886
 887     // indices of the growable columns and rows
 888     wxArrayInt  m_growableRows,
 889                 m_growableCols;
 890
 891     // proportion values of the corresponding growable rows and columns
 892     wxArrayInt  m_growableRowsProportions,
 893                 m_growableColsProportions;
 894
 895     // parameters describing whether the growable cells should be resized in
 896     // both directions or only one
 897     int m_flexDirection;
 898     wxFlexSizerGrowMode m_growMode;
 899
 900     // saves CalcMin result to optimize RecalcSizes
 901     wxSize m_calculatedMinSize;
 902
 903 private:
 904     DECLARE_CLASS(wxFlexGridSizer)
 905     wxDECLARE_NO_COPY_CLASS(wxFlexGridSizer);
 906 };
 907
 908 //---------------------------------------------------------------------------
 909 // wxBoxSizer
 910 //---------------------------------------------------------------------------
 911
 912 class WXDLLIMPEXP_CORE wxBoxSizer: public wxSizer
 913 {
 914 public:
 915     wxBoxSizer(int orient)
 916     {
 917         m_orient = orient;
 918         m_totalProportion = 0;
 919
 920         wxASSERT_MSG( m_orient == wxHORIZONTAL || m_orient == wxVERTICAL,
 921                       wxT("invalid value for wxBoxSizer orientation") );
 922     }
 923
 924     virtual wxSizerItem *AddSpacer(int size);
 925
 926     int GetOrientation() const { return m_orient; }
 927
 928     bool IsVertical() const { return m_orient == wxVERTICAL; }
 929
 930     void SetOrientation(int orient) { m_orient = orient; }
 931
 932     // implementation of our resizing logic
 933     virtual wxSize CalcMin();
 934     virtual void RecalcSizes();
 935
 936 protected:
 937     // helpers for our code: this returns the component of the given wxSize in
 938     // the direction of the sizer and in the other direction, respectively
 939     int GetSizeInMajorDir(const wxSize& sz) const
 940     {
 941         return m_orient == wxHORIZONTAL ? sz.x : sz.y;
 942     }
 943
 944     int& SizeInMajorDir(wxSize& sz)
 945     {
 946         return m_orient == wxHORIZONTAL ? sz.x : sz.y;
 947     }
 948
 949     int& PosInMajorDir(wxPoint& pt)
 950     {
 951         return m_orient == wxHORIZONTAL ? pt.x : pt.y;
 952     }
 953
 954     int GetSizeInMinorDir(const wxSize& sz) const
 955     {
 956         return m_orient == wxHORIZONTAL ? sz.y : sz.x;
 957     }
 958
 959     int& SizeInMinorDir(wxSize& sz)
 960     {
 961         return m_orient == wxHORIZONTAL ? sz.y : sz.x;
 962     }
 963
 964     int& PosInMinorDir(wxPoint& pt)
 965     {
 966         return m_orient == wxHORIZONTAL ? pt.y : pt.x;
 967     }
 968
 969     // another helper: creates wxSize from major and minor components
 970     wxSize SizeFromMajorMinor(int major, int minor) const
 971     {
 972         if ( m_orient == wxHORIZONTAL )
 973         {
 974             return wxSize(major, minor);
 975         }
 976         else // wxVERTICAL
 977         {
 978             return wxSize(minor, major);
 979         }
 980     }
 981
 982
 983     // either wxHORIZONTAL or wxVERTICAL
 984     int m_orient;
 985
 986     // the sum of proportion of all of our elements
 987     int m_totalProportion;
 988
 989     // the minimal size needed for this sizer as calculated by the last call to
 990     // our CalcMin()
 991     wxSize m_minSize;
 992
 993 private:
 994     DECLARE_CLASS(wxBoxSizer)
 995 };
 996
 997 //---------------------------------------------------------------------------
 998 // wxStaticBoxSizer
 999 //---------------------------------------------------------------------------
1000
1001 #if wxUSE_STATBOX
1002
1003 class WXDLLIMPEXP_FWD_CORE wxStaticBox;
1004
1005 class WXDLLIMPEXP_CORE wxStaticBoxSizer: public wxBoxSizer
1006 {
1007 public:
1008     wxStaticBoxSizer(wxStaticBox *box, int orient);
1009     wxStaticBoxSizer(int orient, wxWindow *win, const wxString& label = wxEmptyString);
1010     virtual ~wxStaticBoxSizer();
1011
1012     void RecalcSizes();
1013     wxSize CalcMin();
1014
1015     wxStaticBox *GetStaticBox() const
1016         { return m_staticBox; }
1017
1018     // override to hide/show the static box as well
1019     virtual void ShowItems (bool show);
1020
1021     virtual bool Detach( wxWindow *window );
1022     virtual bool Detach( wxSizer *sizer ) { return wxBoxSizer::Detach(sizer); }
1023     virtual bool Detach( int index ) { return wxBoxSizer::Detach(index); }
1024
1025 protected:
1026     wxStaticBox   *m_staticBox;
1027
1028 private:
1029     DECLARE_CLASS(wxStaticBoxSizer)
1030     wxDECLARE_NO_COPY_CLASS(wxStaticBoxSizer);
1031 };
1032
1033 #endif // wxUSE_STATBOX
1034
1035 //---------------------------------------------------------------------------
1036 // wxStdDialogButtonSizer
1037 //---------------------------------------------------------------------------
1038
1039 #if wxUSE_BUTTON
1040
1041 class WXDLLIMPEXP_CORE wxStdDialogButtonSizer: public wxBoxSizer
1042 {
1043 public:
1044     // Constructor just creates a new wxBoxSizer, not much else.
1045     // Box sizer orientation is automatically determined here:
1046     // vertical for PDAs, horizontal for everything else?
1047     wxStdDialogButtonSizer();
1048
1049     // Checks button ID against system IDs and sets one of the pointers below
1050     // to this button. Does not do any sizer-related things here.
1051     void AddButton(wxButton *button);
1052
1053     // Use these if no standard ID can/should be used
1054     void SetAffirmativeButton( wxButton *button );
1055     void SetNegativeButton( wxButton *button );
1056     void SetCancelButton( wxButton *button );
1057
1058     // All platform-specific code here, checks which buttons exist and add
1059     // them to the sizer accordingly.
1060     // Note - one potential hack on Mac we could use here,
1061     // if m_buttonAffirmative is wxID_SAVE then ensure wxID_SAVE
1062     // is set to _("Save") and m_buttonNegative is set to _("Don't Save")
1063     // I wouldn't add any other hacks like that into here,
1064     // but this one I can see being useful.
1065     void Realize();
1066
1067     wxButton *GetAffirmativeButton() const { return m_buttonAffirmative; }
1068     wxButton *GetApplyButton() const { return m_buttonApply; }
1069     wxButton *GetNegativeButton() const { return m_buttonNegative; }
1070     wxButton *GetCancelButton() const { return m_buttonCancel; }
1071     wxButton *GetHelpButton() const { return m_buttonHelp; }
1072
1073 protected:
1074     wxButton *m_buttonAffirmative;  // wxID_OK, wxID_YES, wxID_SAVE go here
1075     wxButton *m_buttonApply;        // wxID_APPLY
1076     wxButton *m_buttonNegative;     // wxID_NO
1077     wxButton *m_buttonCancel;       // wxID_CANCEL, wxID_CLOSE
1078     wxButton *m_buttonHelp;         // wxID_HELP, wxID_CONTEXT_HELP
1079
1080 private:
1081     DECLARE_CLASS(wxStdDialogButtonSizer)
1082     wxDECLARE_NO_COPY_CLASS(wxStdDialogButtonSizer);
1083 };
1084
1085 #endif // wxUSE_BUTTON
1086
1087
1088 // ----------------------------------------------------------------------------
1089 // inline functions implementation
1090 // ----------------------------------------------------------------------------
1091
1092 #if WXWIN_COMPATIBILITY_2_8
1093
1094 inline void wxSizerItem::SetWindow(wxWindow *window)
1095 {
1096     DoSetWindow(window);
1097 }
1098
1099 inline void wxSizerItem::SetSizer(wxSizer *sizer)
1100 {
1101     DoSetSizer(sizer);
1102 }
1103
1104 inline void wxSizerItem::SetSpacer(const wxSize& size)
1105 {
1106     DoSetSpacer(size);
1107 }
1108
1109 inline void wxSizerItem::SetSpacer(int width, int height)
1110 {
1111     DoSetSpacer(wxSize(width, height));
1112 }
1113
1114 #endif // WXWIN_COMPATIBILITY_2_8
1115
1116 inline wxSizerItem*
1117 wxSizer::Insert(size_t index, wxSizerItem *item)
1118 {
1119     return DoInsert(index, item);
1120 }
1121
1122
1123 inline wxSizerItem*
1124 wxSizer::Add( wxSizerItem *item )
1125 {
1126     return Insert( m_children.GetCount(), item );
1127 }
1128
1129 inline wxSizerItem*
1130 wxSizer::Add( wxWindow *window, int proportion, int flag, int border, wxObject* userData )
1131 {
1132     return Add( new wxSizerItem( window, proportion, flag, border, userData ) );
1133 }
1134
1135 inline wxSizerItem*
1136 wxSizer::Add( wxSizer *sizer, int proportion, int flag, int border, wxObject* userData )
1137 {
1138     return Add( new wxSizerItem( sizer, proportion, flag, border, userData ) );
1139 }
1140
1141 inline wxSizerItem*
1142 wxSizer::Add( int width, int height, int proportion, int flag, int border, wxObject* userData )
1143 {
1144     return Add( new wxSizerItem( width, height, proportion, flag, border, userData ) );
1145 }
1146
1147 inline wxSizerItem*
1148 wxSizer::Add( wxWindow *window, const wxSizerFlags& flags )
1149 {
1150     return Add( new wxSizerItem(window, flags) );
1151 }
1152
1153 inline wxSizerItem*
1154 wxSizer::Add( wxSizer *sizer, const wxSizerFlags& flags )
1155 {
1156     return Add( new wxSizerItem(sizer, flags) );
1157 }
1158
1159 inline wxSizerItem*
1160 wxSizer::Add( int width, int height, const wxSizerFlags& flags )
1161 {
1162     return Add( new wxSizerItem(width, height, flags) );
1163 }
1164
1165 inline wxSizerItem*
1166 wxSizer::AddSpacer(int size)
1167 {
1168     return Add(size, size);
1169 }
1170
1171 inline wxSizerItem*
1172 wxSizer::AddStretchSpacer(int prop)
1173 {
1174     return Add(0, 0, prop);
1175 }
1176
1177 inline wxSizerItem*
1178 wxSizer::Prepend( wxSizerItem *item )
1179 {
1180     return Insert( 0, item );
1181 }
1182
1183 inline wxSizerItem*
1184 wxSizer::Prepend( wxWindow *window, int proportion, int flag, int border, wxObject* userData )
1185 {
1186     return Prepend( new wxSizerItem( window, proportion, flag, border, userData ) );
1187 }
1188
1189 inline wxSizerItem*
1190 wxSizer::Prepend( wxSizer *sizer, int proportion, int flag, int border, wxObject* userData )
1191 {
1192     return Prepend( new wxSizerItem( sizer, proportion, flag, border, userData ) );
1193 }
1194
1195 inline wxSizerItem*
1196 wxSizer::Prepend( int width, int height, int proportion, int flag, int border, wxObject* userData )
1197 {
1198     return Prepend( new wxSizerItem( width, height, proportion, flag, border, userData ) );
1199 }
1200
1201 inline wxSizerItem*
1202 wxSizer::PrependSpacer(int size)
1203 {
1204     return Prepend(size, size);
1205 }
1206
1207 inline wxSizerItem*
1208 wxSizer::PrependStretchSpacer(int prop)
1209 {
1210     return Prepend(0, 0, prop);
1211 }
1212
1213 inline wxSizerItem*
1214 wxSizer::Prepend( wxWindow *window, const wxSizerFlags& flags )
1215 {
1216     return Prepend( new wxSizerItem(window, flags) );
1217 }
1218
1219 inline wxSizerItem*
1220 wxSizer::Prepend( wxSizer *sizer, const wxSizerFlags& flags )
1221 {
1222     return Prepend( new wxSizerItem(sizer, flags) );
1223 }
1224
1225 inline wxSizerItem*
1226 wxSizer::Prepend( int width, int height, const wxSizerFlags& flags )
1227 {
1228     return Prepend( new wxSizerItem(width, height, flags) );
1229 }
1230
1231 inline wxSizerItem*
1232 wxSizer::Insert( size_t index,
1233                  wxWindow *window,
1234                  int proportion,
1235                  int flag,
1236                  int border,
1237                  wxObject* userData )
1238 {
1239     return Insert( index, new wxSizerItem( window, proportion, flag, border, userData ) );
1240 }
1241
1242 inline wxSizerItem*
1243 wxSizer::Insert( size_t index,
1244                  wxSizer *sizer,
1245                  int proportion,
1246                  int flag,
1247                  int border,
1248                  wxObject* userData )
1249 {
1250     return Insert( index, new wxSizerItem( sizer, proportion, flag, border, userData ) );
1251 }
1252
1253 inline wxSizerItem*
1254 wxSizer::Insert( size_t index,
1255                  int width,
1256                  int height,
1257                  int proportion,
1258                  int flag,
1259                  int border,
1260                  wxObject* userData )
1261 {
1262     return Insert( index, new wxSizerItem( width, height, proportion, flag, border, userData ) );
1263 }
1264
1265 inline wxSizerItem*
1266 wxSizer::Insert( size_t index, wxWindow *window, const wxSizerFlags& flags )
1267 {
1268     return Insert( index, new wxSizerItem(window, flags) );
1269 }
1270
1271 inline wxSizerItem*
1272 wxSizer::Insert( size_t index, wxSizer *sizer, const wxSizerFlags& flags )
1273 {
1274     return Insert( index, new wxSizerItem(sizer, flags) );
1275 }
1276
1277 inline wxSizerItem*
1278 wxSizer::Insert( size_t index, int width, int height, const wxSizerFlags& flags )
1279 {
1280     return Insert( index, new wxSizerItem(width, height, flags) );
1281 }
1282
1283 inline wxSizerItem*
1284 wxSizer::InsertSpacer(size_t index, int size)
1285 {
1286     return Insert(index, size, size);
1287 }
1288
1289 inline wxSizerItem*
1290 wxSizer::InsertStretchSpacer(size_t index, int prop)
1291 {
1292     return Insert(index, 0, 0, prop);
1293 }
1294
1295 #endif // __WXSIZER_H__