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         wxCHECK_MSG( !(direction & ~wxALL), *this,
 129                      wxS("direction must be a combination of wxDirection ")
 130                      wxS("enum values.") );
 131
 132         m_flags &= ~wxALL;
 133         m_flags |= direction;
 134
 135         m_borderInPixels = borderInPixels;
 136
 137         return *this;
 138     }
 139
 140     wxSizerFlags& Border(int direction = wxALL)
 141     {
 142 #if wxUSE_BORDER_BY_DEFAULT
 143         return Border(direction, GetDefaultBorder());
 144 #else
 145         // no borders by default on limited size screen
 146         wxUnusedVar(direction);
 147
 148         return *this;
 149 #endif
 150     }
 151
 152     wxSizerFlags& DoubleBorder(int direction = wxALL)
 153     {
 154 #if wxUSE_BORDER_BY_DEFAULT
 155         return Border(direction, 2*GetDefaultBorder());
 156 #else
 157         wxUnusedVar(direction);
 158
 159         return *this;
 160 #endif
 161     }
 162
 163     wxSizerFlags& TripleBorder(int direction = wxALL)
 164     {
 165 #if wxUSE_BORDER_BY_DEFAULT
 166         return Border(direction, 3*GetDefaultBorder());
 167 #else
 168         wxUnusedVar(direction);
 169
 170         return *this;
 171 #endif
 172     }
 173
 174     wxSizerFlags& HorzBorder()
 175     {
 176 #if wxUSE_BORDER_BY_DEFAULT
 177         return Border(wxLEFT | wxRIGHT, GetDefaultBorder());
 178 #else
 179         return *this;
 180 #endif
 181     }
 182
 183     wxSizerFlags& DoubleHorzBorder()
 184     {
 185 #if wxUSE_BORDER_BY_DEFAULT
 186         return Border(wxLEFT | wxRIGHT, 2*GetDefaultBorder());
 187 #else
 188         return *this;
 189 #endif
 190     }
 191
 192     // setters for the others flags
 193     wxSizerFlags& Shaped()
 194     {
 195         m_flags |= wxSHAPED;
 196
 197         return *this;
 198     }
 199
 200     wxSizerFlags& FixedMinSize()
 201     {
 202         m_flags |= wxFIXED_MINSIZE;
 203
 204         return *this;
 205     }
 206
 207     // makes the item ignore window's visibility status
 208     wxSizerFlags& ReserveSpaceEvenIfHidden()
 209     {
 210         m_flags |= wxRESERVE_SPACE_EVEN_IF_HIDDEN;
 211         return *this;
 212     }
 213
 214     // accessors for wxSizer only
 215     int GetProportion() const { return m_proportion; }
 216     int GetFlags() const { return m_flags; }
 217     int GetBorderInPixels() const { return m_borderInPixels; }
 218
 219 private:
 220     int m_proportion;
 221     int m_flags;
 222     int m_borderInPixels;
 223 };
 224
 225
 226 // ----------------------------------------------------------------------------
 227 // wxSizerSpacer: used by wxSizerItem to represent a spacer
 228 // ----------------------------------------------------------------------------
 229
 230 class WXDLLIMPEXP_CORE wxSizerSpacer
 231 {
 232 public:
 233     wxSizerSpacer(const wxSize& size) : m_size(size), m_isShown(true) { }
 234
 235     void SetSize(const wxSize& size) { m_size = size; }
 236     const wxSize& GetSize() const { return m_size; }
 237
 238     void Show(bool show) { m_isShown = show; }
 239     bool IsShown() const { return m_isShown; }
 240
 241 private:
 242     // the size, in pixel
 243     wxSize m_size;
 244
 245     // is the spacer currently shown?
 246     bool m_isShown;
 247 };
 248
 249 // ----------------------------------------------------------------------------
 250 // wxSizerItem
 251 // ----------------------------------------------------------------------------
 252
 253 class WXDLLIMPEXP_CORE wxSizerItem : public wxObject
 254 {
 255 public:
 256     // window
 257     wxSizerItem( wxWindow *window,
 258                  int proportion=0,
 259                  int flag=0,
 260                  int border=0,
 261                  wxObject* userData=NULL );
 262
 263     // window with flags
 264     wxSizerItem(wxWindow *window, const wxSizerFlags& flags)
 265     {
 266         Init(flags);
 267
 268         DoSetWindow(window);
 269     }
 270
 271     // subsizer
 272     wxSizerItem( wxSizer *sizer,
 273                  int proportion=0,
 274                  int flag=0,
 275                  int border=0,
 276                  wxObject* userData=NULL );
 277
 278     // sizer with flags
 279     wxSizerItem(wxSizer *sizer, const wxSizerFlags& flags)
 280     {
 281         Init(flags);
 282
 283         DoSetSizer(sizer);
 284     }
 285
 286     // spacer
 287     wxSizerItem( int width,
 288                  int height,
 289                  int proportion=0,
 290                  int flag=0,
 291                  int border=0,
 292                  wxObject* userData=NULL);
 293
 294     // spacer with flags
 295     wxSizerItem(int width, int height, const wxSizerFlags& flags)
 296     {
 297         Init(flags);
 298
 299         DoSetSpacer(wxSize(width, height));
 300     }
 301
 302     wxSizerItem();
 303     virtual ~wxSizerItem();
 304
 305     virtual void DeleteWindows();
 306
 307     // Enable deleting the SizerItem without destroying the contained sizer.
 308     void DetachSizer() { m_sizer = NULL; }
 309
 310     virtual wxSize GetSize() const;
 311     virtual wxSize CalcMin();
 312     virtual void SetDimension( const wxPoint& pos, const wxSize& size );
 313
 314     wxSize GetMinSize() const
 315         { return m_minSize; }
 316     wxSize GetMinSizeWithBorder() const;
 317
 318     wxSize GetMaxSize() const
 319         { return IsWindow() ? m_window->GetMaxSize() : wxDefaultSize; }
 320     wxSize GetMaxSizeWithBorder() const;
 321
 322     void SetMinSize(const wxSize& size)
 323     {
 324         if ( IsWindow() )
 325             m_window->SetMinSize(size);
 326         m_minSize = size;
 327     }
 328     void SetMinSize( int x, int y )
 329         { SetMinSize(wxSize(x, y)); }
 330     void SetInitSize( int x, int y )
 331         { SetMinSize(wxSize(x, y)); }
 332
 333     // if either of dimensions is zero, ratio is assumed to be 1
 334     // to avoid "divide by zero" errors
 335     void SetRatio(int width, int height)
 336         { m_ratio = (width && height) ? ((float) width / (float) height) : 1; }
 337     void SetRatio(const wxSize& size)
 338         { SetRatio(size.x, size.y); }
 339     void SetRatio(float ratio)
 340         { m_ratio = ratio; }
 341     float GetRatio() const
 342         { return m_ratio; }
 343
 344     virtual wxRect GetRect() { return m_rect; }
 345
 346     // set a sizer item id (different from a window id, all sizer items,
 347     // including spacers, can have an associated id)
 348     void SetId(int id) { m_id = id; }
 349     int GetId() const { return m_id; }
 350
 351     bool IsWindow() const { return m_kind == Item_Window; }
 352     bool IsSizer() const { return m_kind == Item_Sizer; }
 353     bool IsSpacer() const { return m_kind == Item_Spacer; }
 354
 355 #if WXWIN_COMPATIBILITY_2_6
 356     // Deprecated in 2.6, use {G,S}etProportion instead.
 357     wxDEPRECATED( void SetOption( int option ) );
 358     wxDEPRECATED( int GetOption() const );
 359 #endif // WXWIN_COMPATIBILITY_2_6
 360
 361     void SetProportion( int proportion )
 362         { m_proportion = proportion; }
 363     int GetProportion() const
 364         { return m_proportion; }
 365     void SetFlag( int flag )
 366         { m_flag = flag; }
 367     int GetFlag() const
 368         { return m_flag; }
 369     void SetBorder( int border )
 370         { m_border = border; }
 371     int GetBorder() const
 372         { return m_border; }
 373
 374     wxWindow *GetWindow() const
 375         { return m_kind == Item_Window ? m_window : NULL; }
 376     wxSizer *GetSizer() const
 377         { return m_kind == Item_Sizer ? m_sizer : NULL; }
 378     wxSize GetSpacer() const;
 379
 380     // This function behaves obviously for the windows and spacers but for the
 381     // sizers it returns true if any sizer element is shown and only returns
 382     // false if all of them are hidden. Also, it always returns true if
 383     // wxRESERVE_SPACE_EVEN_IF_HIDDEN flag was used.
 384     bool IsShown() const;
 385
 386     void Show(bool show);
 387
 388     void SetUserData(wxObject* userData)
 389         { delete m_userData; m_userData = userData; }
 390     wxObject* GetUserData() const
 391         { return m_userData; }
 392     wxPoint GetPosition() const
 393         { return m_pos; }
 394
 395     // Called once the first component of an item has been decided. This is
 396     // used in algorithms that depend on knowing the size in one direction
 397     // before the min size in the other direction can be known.
 398     // Returns true if it made use of the information (and min size was changed).
 399     bool InformFirstDirection( int direction, int size, int availableOtherDir=-1 );
 400
 401     // these functions delete the current contents of the item if it's a sizer
 402     // or a spacer but not if it is a window
 403     void AssignWindow(wxWindow *window)
 404     {
 405         Free();
 406         DoSetWindow(window);
 407     }
 408
 409     void AssignSizer(wxSizer *sizer)
 410     {
 411         Free();
 412         DoSetSizer(sizer);
 413     }
 414
 415     void AssignSpacer(const wxSize& size)
 416     {
 417         Free();
 418         DoSetSpacer(size);
 419     }
 420
 421     void AssignSpacer(int w, int h) { AssignSpacer(wxSize(w, h)); }
 422
 423 #if WXWIN_COMPATIBILITY_2_8
 424     // these functions do not free the old sizer/spacer and so can easily
 425     // provoke the memory leaks and so shouldn't be used, use Assign() instead
 426     wxDEPRECATED( void SetWindow(wxWindow *window) );
 427     wxDEPRECATED( void SetSizer(wxSizer *sizer) );
 428     wxDEPRECATED( void SetSpacer(const wxSize& size) );
 429     wxDEPRECATED( void SetSpacer(int width, int height) );
 430 #endif // WXWIN_COMPATIBILITY_2_8
 431
 432 protected:
 433     // common part of several ctors
 434     void Init() { m_userData = NULL; m_kind = Item_None; }
 435
 436     // common part of ctors taking wxSizerFlags
 437     void Init(const wxSizerFlags& flags);
 438
 439     // free current contents
 440     void Free();
 441
 442     // common parts of Set/AssignXXX()
 443     void DoSetWindow(wxWindow *window);
 444     void DoSetSizer(wxSizer *sizer);
 445     void DoSetSpacer(const wxSize& size);
 446
 447     // Add the border specified for this item to the given size
 448     // if it's != wxDefaultSize, just return wxDefaultSize otherwise.
 449     wxSize AddBorderToSize(const wxSize& size) const;
 450
 451     // discriminated union: depending on m_kind one of the fields is valid
 452     enum
 453     {
 454         Item_None,
 455         Item_Window,
 456         Item_Sizer,
 457         Item_Spacer,
 458         Item_Max
 459     } m_kind;
 460     union
 461     {
 462         wxWindow      *m_window;
 463         wxSizer       *m_sizer;
 464         wxSizerSpacer *m_spacer;
 465     };
 466
 467     wxPoint      m_pos;
 468     wxSize       m_minSize;
 469     int          m_proportion;
 470     int          m_border;
 471     int          m_flag;
 472     int          m_id;
 473
 474     // on screen rectangle of this item (not including borders)
 475     wxRect       m_rect;
 476
 477     // Aspect ratio can always be calculated from m_size,
 478     // but this would cause precision loss when the window
 479     // is shrunk.  It is safer to preserve the initial value.
 480     float        m_ratio;
 481
 482     wxObject    *m_userData;
 483
 484 private:
 485     DECLARE_CLASS(wxSizerItem)
 486     wxDECLARE_NO_COPY_CLASS(wxSizerItem);
 487 };
 488
 489 WX_DECLARE_EXPORTED_LIST( wxSizerItem, wxSizerItemList );
 490
 491
 492 //---------------------------------------------------------------------------
 493 // wxSizer
 494 //---------------------------------------------------------------------------
 495
 496 class WXDLLIMPEXP_CORE wxSizer: public wxObject, public wxClientDataContainer
 497 {
 498 public:
 499     wxSizer() { m_containingWindow = NULL; }
 500     virtual ~wxSizer();
 501
 502     // methods for adding elements to the sizer: there are Add/Insert/Prepend
 503     // overloads for each of window/sizer/spacer/wxSizerItem
 504     wxSizerItem* Add(wxWindow *window,
 505                      int proportion = 0,
 506                      int flag = 0,
 507                      int border = 0,
 508                      wxObject* userData = NULL);
 509     wxSizerItem* Add(wxSizer *sizer,
 510                      int proportion = 0,
 511                      int flag = 0,
 512                      int border = 0,
 513                      wxObject* userData = NULL);
 514     wxSizerItem* Add(int width,
 515                      int height,
 516                      int proportion = 0,
 517                      int flag = 0,
 518                      int border = 0,
 519                      wxObject* userData = NULL);
 520     wxSizerItem* Add( wxWindow *window, const wxSizerFlags& flags);
 521     wxSizerItem* Add( wxSizer *sizer, const wxSizerFlags& flags);
 522     wxSizerItem* Add( int width, int height, const wxSizerFlags& flags);
 523     wxSizerItem* Add( wxSizerItem *item);
 524
 525     virtual wxSizerItem *AddSpacer(int size);
 526     wxSizerItem* AddStretchSpacer(int prop = 1);
 527
 528     wxSizerItem* Insert(size_t index,
 529                         wxWindow *window,
 530                         int proportion = 0,
 531                         int flag = 0,
 532                         int border = 0,
 533                         wxObject* userData = NULL);
 534     wxSizerItem* Insert(size_t index,
 535                         wxSizer *sizer,
 536                         int proportion = 0,
 537                         int flag = 0,
 538                         int border = 0,
 539                         wxObject* userData = NULL);
 540     wxSizerItem* Insert(size_t index,
 541                         int width,
 542                         int height,
 543                         int proportion = 0,
 544                         int flag = 0,
 545                         int border = 0,
 546                         wxObject* userData = NULL);
 547     wxSizerItem* Insert(size_t index,
 548                         wxWindow *window,
 549                         const wxSizerFlags& flags);
 550     wxSizerItem* Insert(size_t index,
 551                         wxSizer *sizer,
 552                         const wxSizerFlags& flags);
 553     wxSizerItem* Insert(size_t index,
 554                         int width,
 555                         int height,
 556                         const wxSizerFlags& flags);
 557
 558     // NB: do _not_ override this function in the derived classes, this one is
 559     //     virtual for compatibility reasons only to allow old code overriding
 560     //     it to continue to work, override DoInsert() instead in the new code
 561     virtual wxSizerItem* Insert(size_t index, wxSizerItem *item);
 562
 563     wxSizerItem* InsertSpacer(size_t index, int size);
 564     wxSizerItem* InsertStretchSpacer(size_t index, int prop = 1);
 565
 566     wxSizerItem* Prepend(wxWindow *window,
 567                          int proportion = 0,
 568                          int flag = 0,
 569                          int border = 0,
 570                          wxObject* userData = NULL);
 571     wxSizerItem* Prepend(wxSizer *sizer,
 572                          int proportion = 0,
 573                          int flag = 0,
 574                          int border = 0,
 575                          wxObject* userData = NULL);
 576     wxSizerItem* Prepend(int width,
 577                          int height,
 578                          int proportion = 0,
 579                          int flag = 0,
 580                          int border = 0,
 581                          wxObject* userData = NULL);
 582     wxSizerItem* Prepend(wxWindow *window, const wxSizerFlags& flags);
 583     wxSizerItem* Prepend(wxSizer *sizer, const wxSizerFlags& flags);
 584     wxSizerItem* Prepend(int width, int height, const wxSizerFlags& flags);
 585     wxSizerItem* Prepend(wxSizerItem *item);
 586
 587     wxSizerItem* PrependSpacer(int size);
 588     wxSizerItem* PrependStretchSpacer(int prop = 1);
 589
 590     // set (or possibly unset if window is NULL) or get the window this sizer
 591     // is used in
 592     void SetContainingWindow(wxWindow *window);
 593     wxWindow *GetContainingWindow() const { return m_containingWindow; }
 594
 595 #if WXWIN_COMPATIBILITY_2_6
 596     // Deprecated in 2.6 since historically it does not delete the window,
 597     // use Detach instead.
 598     wxDEPRECATED( virtual bool Remove( wxWindow *window ) );
 599 #endif // WXWIN_COMPATIBILITY_2_6
 600
 601     virtual bool Remove( wxSizer *sizer );
 602     virtual bool Remove( int index );
 603
 604     virtual bool Detach( wxWindow *window );
 605     virtual bool Detach( wxSizer *sizer );
 606     virtual bool Detach( int index );
 607
 608     virtual bool Replace( wxWindow *oldwin, wxWindow *newwin, bool recursive = false );
 609     virtual bool Replace( wxSizer *oldsz, wxSizer *newsz, bool recursive = false );
 610     virtual bool Replace( size_t index, wxSizerItem *newitem );
 611
 612     virtual void Clear( bool delete_windows = false );
 613     virtual void DeleteWindows();
 614
 615     // Inform sizer about the first direction that has been decided (by parent item)
 616     // Returns true if it made use of the information (and recalculated min size)
 617     virtual bool InformFirstDirection( int WXUNUSED(direction), int WXUNUSED(size), int WXUNUSED(availableOtherDir) )
 618         { return false; }
 619
 620     void SetMinSize( int width, int height )
 621         { DoSetMinSize( width, height ); }
 622     void SetMinSize( const wxSize& size )
 623         { DoSetMinSize( size.x, size.y ); }
 624
 625     // Searches recursively
 626     bool SetItemMinSize( wxWindow *window, int width, int height )
 627         { return DoSetItemMinSize( window, width, height ); }
 628     bool SetItemMinSize( wxWindow *window, const wxSize& size )
 629         { return DoSetItemMinSize( window, size.x, size.y ); }
 630
 631     // Searches recursively
 632     bool SetItemMinSize( wxSizer *sizer, int width, int height )
 633         { return DoSetItemMinSize( sizer, width, height ); }
 634     bool SetItemMinSize( wxSizer *sizer, const wxSize& size )
 635         { return DoSetItemMinSize( sizer, size.x, size.y ); }
 636
 637     bool SetItemMinSize( size_t index, int width, int height )
 638         { return DoSetItemMinSize( index, width, height ); }
 639     bool SetItemMinSize( size_t index, const wxSize& size )
 640         { return DoSetItemMinSize( index, size.x, size.y ); }
 641
 642     wxSize GetSize() const
 643         { return m_size; }
 644     wxPoint GetPosition() const
 645         { return m_position; }
 646
 647     // Calculate the minimal size or return m_minSize if bigger.
 648     wxSize GetMinSize();
 649
 650     // These virtual functions are used by the layout algorithm: first
 651     // CalcMin() is called to calculate the minimal size of the sizer and
 652     // prepare for laying it out and then RecalcSizes() is called to really
 653     // update all the sizer items
 654     virtual wxSize CalcMin() = 0;
 655     virtual void RecalcSizes() = 0;
 656
 657     virtual void Layout();
 658
 659     wxSize ComputeFittingClientSize(wxWindow *window);
 660     wxSize ComputeFittingWindowSize(wxWindow *window);
 661
 662     wxSize Fit( wxWindow *window );
 663     void FitInside( wxWindow *window );
 664     void SetSizeHints( wxWindow *window );
 665 #if WXWIN_COMPATIBILITY_2_8
 666     // This only calls FitInside() since 2.9
 667     wxDEPRECATED( void SetVirtualSizeHints( wxWindow *window ) );
 668 #endif
 669
 670     wxSizerItemList& GetChildren()
 671         { return m_children; }
 672     const wxSizerItemList& GetChildren() const
 673         { return m_children; }
 674
 675     void SetDimension(const wxPoint& pos, const wxSize& size)
 676     {
 677         m_position = pos;
 678         m_size = size;
 679         Layout();
 680
 681         // This call is required for wxWrapSizer to be able to calculate its
 682         // minimal size correctly.
 683         InformFirstDirection(wxHORIZONTAL, size.x, size.y);
 684     }
 685     void SetDimension(int x, int y, int width, int height)
 686         { SetDimension(wxPoint(x, y), wxSize(width, height)); }
 687
 688     size_t GetItemCount() const { return m_children.GetCount(); }
 689     bool IsEmpty() const { return m_children.IsEmpty(); }
 690
 691     wxSizerItem* GetItem( wxWindow *window, bool recursive = false );
 692     wxSizerItem* GetItem( wxSizer *sizer, bool recursive = false );
 693     wxSizerItem* GetItem( size_t index );
 694     wxSizerItem* GetItemById( int id, bool recursive = false );
 695
 696     // Manage whether individual scene items are considered
 697     // in the layout calculations or not.
 698     bool Show( wxWindow *window, bool show = true, bool recursive = false );
 699     bool Show( wxSizer *sizer, bool show = true, bool recursive = false );
 700     bool Show( size_t index, bool show = true );
 701
 702     bool Hide( wxSizer *sizer, bool recursive = false )
 703         { return Show( sizer, false, recursive ); }
 704     bool Hide( wxWindow *window, bool recursive = false )
 705         { return Show( window, false, recursive ); }
 706     bool Hide( size_t index )
 707         { return Show( index, false ); }
 708
 709     bool IsShown( wxWindow *window ) const;
 710     bool IsShown( wxSizer *sizer ) const;
 711     bool IsShown( size_t index ) const;
 712
 713     // Recursively call wxWindow::Show () on all sizer items.
 714     virtual void ShowItems (bool show);
 715
 716     void Show(bool show) { ShowItems(show); }
 717
 718     // This is the ShowItems() counterpart and returns true if any of the sizer
 719     // items are shown.
 720     virtual bool AreAnyItemsShown() const;
 721
 722 protected:
 723     wxSize              m_size;
 724     wxSize              m_minSize;
 725     wxPoint             m_position;
 726     wxSizerItemList     m_children;
 727
 728     // the window this sizer is used in, can be NULL
 729     wxWindow *m_containingWindow;
 730
 731     wxSize GetMaxClientSize( wxWindow *window ) const;
 732     wxSize GetMinClientSize( wxWindow *window );
 733     wxSize VirtualFitSize( wxWindow *window );
 734
 735     virtual void DoSetMinSize( int width, int height );
 736     virtual bool DoSetItemMinSize( wxWindow *window, int width, int height );
 737     virtual bool DoSetItemMinSize( wxSizer *sizer, int width, int height );
 738     virtual bool DoSetItemMinSize( size_t index, int width, int height );
 739
 740     // insert a new item into m_children at given index and return the item
 741     // itself
 742     virtual wxSizerItem* DoInsert(size_t index, wxSizerItem *item);
 743
 744 private:
 745     DECLARE_CLASS(wxSizer)
 746 };
 747
 748 //---------------------------------------------------------------------------
 749 // wxGridSizer
 750 //---------------------------------------------------------------------------
 751
 752 class WXDLLIMPEXP_CORE wxGridSizer: public wxSizer
 753 {
 754 public:
 755     // ctors specifying the number of columns only: number of rows will be
 756     // deduced automatically depending on the number of sizer elements
 757     wxGridSizer( int cols, int vgap, int hgap );
 758     wxGridSizer( int cols, const wxSize& gap = wxSize(0, 0) );
 759
 760     // ctors specifying the number of rows and columns
 761     wxGridSizer( int rows, int cols, int vgap, int hgap );
 762     wxGridSizer( int rows, int cols, const wxSize& gap );
 763
 764     virtual void RecalcSizes();
 765     virtual wxSize CalcMin();
 766
 767     void SetCols( int cols )
 768     {
 769         wxASSERT_MSG( cols >= 0, "Number of columns must be non-negative");
 770         m_cols = cols;
 771     }
 772
 773     void SetRows( int rows )
 774     {
 775         wxASSERT_MSG( rows >= 0, "Number of rows must be non-negative");
 776         m_rows = rows;
 777     }
 778
 779     void SetVGap( int gap )     { m_vgap = gap; }
 780     void SetHGap( int gap )     { m_hgap = gap; }
 781     int GetCols() const         { return m_cols; }
 782     int GetRows() const         { return m_rows; }
 783     int GetVGap() const         { return m_vgap; }
 784     int GetHGap() const         { return m_hgap; }
 785
 786     int GetEffectiveColsCount() const   { return m_cols ? m_cols : CalcCols(); }
 787     int GetEffectiveRowsCount() const   { return m_rows ? m_rows : CalcRows(); }
 788
 789     // return the number of total items and the number of columns and rows
 790     // (for internal use only)
 791     int CalcRowsCols(int& rows, int& cols) const;
 792
 793 protected:
 794     // the number of rows/columns in the sizer, if 0 then it is determined
 795     // dynamically depending on the total number of items
 796     int    m_rows;
 797     int    m_cols;
 798
 799     // gaps between rows and columns
 800     int    m_vgap;
 801     int    m_hgap;
 802
 803     virtual wxSizerItem *DoInsert(size_t index, wxSizerItem *item);
 804
 805     void SetItemBounds( wxSizerItem *item, int x, int y, int w, int h );
 806
 807     // returns the number of columns/rows needed for the current total number
 808     // of children (and the fixed number of rows/columns)
 809     int CalcCols() const
 810     {
 811         wxCHECK_MSG
 812         (
 813             m_rows, 0,
 814             "Can't calculate number of cols if number of rows is not specified"
 815         );
 816
 817         return int(m_children.GetCount() + m_rows - 1) / m_rows;
 818     }
 819
 820     int CalcRows() const
 821     {
 822         wxCHECK_MSG
 823         (
 824             m_cols, 0,
 825             "Can't calculate number of cols if number of rows is not specified"
 826         );
 827
 828         return int(m_children.GetCount() + m_cols - 1) / m_cols;
 829     }
 830
 831 private:
 832     DECLARE_CLASS(wxGridSizer)
 833 };
 834
 835 //---------------------------------------------------------------------------
 836 // wxFlexGridSizer
 837 //---------------------------------------------------------------------------
 838
 839 // values which define the behaviour for resizing wxFlexGridSizer cells in the
 840 // "non-flexible" direction
 841 enum wxFlexSizerGrowMode
 842 {
 843     // don't resize the cells in non-flexible direction at all
 844     wxFLEX_GROWMODE_NONE,
 845
 846     // uniformly resize only the specified ones (default)
 847     wxFLEX_GROWMODE_SPECIFIED,
 848
 849     // uniformly resize all cells
 850     wxFLEX_GROWMODE_ALL
 851 };
 852
 853 class WXDLLIMPEXP_CORE wxFlexGridSizer: public wxGridSizer
 854 {
 855 public:
 856     // ctors specifying the number of columns only: number of rows will be
 857     // deduced automatically depending on the number of sizer elements
 858     wxFlexGridSizer( int cols, int vgap, int hgap );
 859     wxFlexGridSizer( int cols, const wxSize& gap = wxSize(0, 0) );
 860
 861     // ctors specifying the number of rows and columns
 862     wxFlexGridSizer( int rows, int cols, int vgap, int hgap );
 863     wxFlexGridSizer( int rows, int cols, const wxSize& gap );
 864
 865     // dtor
 866     virtual ~wxFlexGridSizer();
 867
 868     // set the rows/columns which will grow (the others will remain of the
 869     // constant initial size)
 870     void AddGrowableRow( size_t idx, int proportion = 0 );
 871     void RemoveGrowableRow( size_t idx );
 872     void AddGrowableCol( size_t idx, int proportion = 0 );
 873     void RemoveGrowableCol( size_t idx );
 874
 875     bool IsRowGrowable( size_t idx );
 876     bool IsColGrowable( size_t idx );
 877
 878     // the sizer cells may grow in both directions, not grow at all or only
 879     // grow in one direction but not the other
 880
 881     // the direction may be wxVERTICAL, wxHORIZONTAL or wxBOTH (default)
 882     void SetFlexibleDirection(int direction) { m_flexDirection = direction; }
 883     int GetFlexibleDirection() const { return m_flexDirection; }
 884
 885     // note that the grow mode only applies to the direction which is not
 886     // flexible
 887     void SetNonFlexibleGrowMode(wxFlexSizerGrowMode mode) { m_growMode = mode; }
 888     wxFlexSizerGrowMode GetNonFlexibleGrowMode() const { return m_growMode; }
 889
 890     // Read-only access to the row heights and col widths arrays
 891     const wxArrayInt& GetRowHeights() const { return m_rowHeights; }
 892     const wxArrayInt& GetColWidths() const  { return m_colWidths; }
 893
 894     // implementation
 895     virtual void RecalcSizes();
 896     virtual wxSize CalcMin();
 897
 898 protected:
 899     void AdjustForFlexDirection();
 900     void AdjustForGrowables(const wxSize& sz);
 901     void FindWidthsAndHeights(int nrows, int ncols);
 902
 903     // the heights/widths of all rows/columns
 904     wxArrayInt  m_rowHeights,
 905                 m_colWidths;
 906
 907     // indices of the growable columns and rows
 908     wxArrayInt  m_growableRows,
 909                 m_growableCols;
 910
 911     // proportion values of the corresponding growable rows and columns
 912     wxArrayInt  m_growableRowsProportions,
 913                 m_growableColsProportions;
 914
 915     // parameters describing whether the growable cells should be resized in
 916     // both directions or only one
 917     int m_flexDirection;
 918     wxFlexSizerGrowMode m_growMode;
 919
 920     // saves CalcMin result to optimize RecalcSizes
 921     wxSize m_calculatedMinSize;
 922
 923 private:
 924     DECLARE_CLASS(wxFlexGridSizer)
 925     wxDECLARE_NO_COPY_CLASS(wxFlexGridSizer);
 926 };
 927
 928 //---------------------------------------------------------------------------
 929 // wxBoxSizer
 930 //---------------------------------------------------------------------------
 931
 932 class WXDLLIMPEXP_CORE wxBoxSizer: public wxSizer
 933 {
 934 public:
 935     wxBoxSizer(int orient)
 936     {
 937         m_orient = orient;
 938         m_totalProportion = 0;
 939
 940         wxASSERT_MSG( m_orient == wxHORIZONTAL || m_orient == wxVERTICAL,
 941                       wxT("invalid value for wxBoxSizer orientation") );
 942     }
 943
 944     virtual wxSizerItem *AddSpacer(int size);
 945
 946     int GetOrientation() const { return m_orient; }
 947
 948     bool IsVertical() const { return m_orient == wxVERTICAL; }
 949
 950     void SetOrientation(int orient) { m_orient = orient; }
 951
 952     // implementation of our resizing logic
 953     virtual wxSize CalcMin();
 954     virtual void RecalcSizes();
 955
 956 protected:
 957     // helpers for our code: this returns the component of the given wxSize in
 958     // the direction of the sizer and in the other direction, respectively
 959     int GetSizeInMajorDir(const wxSize& sz) const
 960     {
 961         return m_orient == wxHORIZONTAL ? sz.x : sz.y;
 962     }
 963
 964     int& SizeInMajorDir(wxSize& sz)
 965     {
 966         return m_orient == wxHORIZONTAL ? sz.x : sz.y;
 967     }
 968
 969     int& PosInMajorDir(wxPoint& pt)
 970     {
 971         return m_orient == wxHORIZONTAL ? pt.x : pt.y;
 972     }
 973
 974     int GetSizeInMinorDir(const wxSize& sz) const
 975     {
 976         return m_orient == wxHORIZONTAL ? sz.y : sz.x;
 977     }
 978
 979     int& SizeInMinorDir(wxSize& sz)
 980     {
 981         return m_orient == wxHORIZONTAL ? sz.y : sz.x;
 982     }
 983
 984     int& PosInMinorDir(wxPoint& pt)
 985     {
 986         return m_orient == wxHORIZONTAL ? pt.y : pt.x;
 987     }
 988
 989     // another helper: creates wxSize from major and minor components
 990     wxSize SizeFromMajorMinor(int major, int minor) const
 991     {
 992         if ( m_orient == wxHORIZONTAL )
 993         {
 994             return wxSize(major, minor);
 995         }
 996         else // wxVERTICAL
 997         {
 998             return wxSize(minor, major);
 999         }
1000     }
1001
1002
1003     // either wxHORIZONTAL or wxVERTICAL
1004     int m_orient;
1005
1006     // the sum of proportion of all of our elements
1007     int m_totalProportion;
1008
1009     // the minimal size needed for this sizer as calculated by the last call to
1010     // our CalcMin()
1011     wxSize m_minSize;
1012
1013 private:
1014     DECLARE_CLASS(wxBoxSizer)
1015 };
1016
1017 //---------------------------------------------------------------------------
1018 // wxStaticBoxSizer
1019 //---------------------------------------------------------------------------
1020
1021 #if wxUSE_STATBOX
1022
1023 class WXDLLIMPEXP_FWD_CORE wxStaticBox;
1024
1025 class WXDLLIMPEXP_CORE wxStaticBoxSizer: public wxBoxSizer
1026 {
1027 public:
1028     wxStaticBoxSizer(wxStaticBox *box, int orient);
1029     wxStaticBoxSizer(int orient, wxWindow *win, const wxString& label = wxEmptyString);
1030     virtual ~wxStaticBoxSizer();
1031
1032     void RecalcSizes();
1033     wxSize CalcMin();
1034
1035     wxStaticBox *GetStaticBox() const
1036         { return m_staticBox; }
1037
1038     // override to hide/show the static box as well
1039     virtual void ShowItems (bool show);
1040     virtual bool AreAnyItemsShown() const;
1041
1042     virtual bool Detach( wxWindow *window );
1043     virtual bool Detach( wxSizer *sizer ) { return wxBoxSizer::Detach(sizer); }
1044     virtual bool Detach( int index ) { return wxBoxSizer::Detach(index); }
1045
1046 protected:
1047     wxStaticBox   *m_staticBox;
1048
1049 private:
1050     DECLARE_CLASS(wxStaticBoxSizer)
1051     wxDECLARE_NO_COPY_CLASS(wxStaticBoxSizer);
1052 };
1053
1054 #endif // wxUSE_STATBOX
1055
1056 //---------------------------------------------------------------------------
1057 // wxStdDialogButtonSizer
1058 //---------------------------------------------------------------------------
1059
1060 #if wxUSE_BUTTON
1061
1062 class WXDLLIMPEXP_CORE wxStdDialogButtonSizer: public wxBoxSizer
1063 {
1064 public:
1065     // Constructor just creates a new wxBoxSizer, not much else.
1066     // Box sizer orientation is automatically determined here:
1067     // vertical for PDAs, horizontal for everything else?
1068     wxStdDialogButtonSizer();
1069
1070     // Checks button ID against system IDs and sets one of the pointers below
1071     // to this button. Does not do any sizer-related things here.
1072     void AddButton(wxButton *button);
1073
1074     // Use these if no standard ID can/should be used
1075     void SetAffirmativeButton( wxButton *button );
1076     void SetNegativeButton( wxButton *button );
1077     void SetCancelButton( wxButton *button );
1078
1079     // All platform-specific code here, checks which buttons exist and add
1080     // them to the sizer accordingly.
1081     // Note - one potential hack on Mac we could use here,
1082     // if m_buttonAffirmative is wxID_SAVE then ensure wxID_SAVE
1083     // is set to _("Save") and m_buttonNegative is set to _("Don't Save")
1084     // I wouldn't add any other hacks like that into here,
1085     // but this one I can see being useful.
1086     void Realize();
1087
1088     wxButton *GetAffirmativeButton() const { return m_buttonAffirmative; }
1089     wxButton *GetApplyButton() const { return m_buttonApply; }
1090     wxButton *GetNegativeButton() const { return m_buttonNegative; }
1091     wxButton *GetCancelButton() const { return m_buttonCancel; }
1092     wxButton *GetHelpButton() const { return m_buttonHelp; }
1093
1094 protected:
1095     wxButton *m_buttonAffirmative;  // wxID_OK, wxID_YES, wxID_SAVE go here
1096     wxButton *m_buttonApply;        // wxID_APPLY
1097     wxButton *m_buttonNegative;     // wxID_NO
1098     wxButton *m_buttonCancel;       // wxID_CANCEL, wxID_CLOSE
1099     wxButton *m_buttonHelp;         // wxID_HELP, wxID_CONTEXT_HELP
1100
1101 private:
1102     DECLARE_CLASS(wxStdDialogButtonSizer)
1103     wxDECLARE_NO_COPY_CLASS(wxStdDialogButtonSizer);
1104 };
1105
1106 #endif // wxUSE_BUTTON
1107
1108
1109 // ----------------------------------------------------------------------------
1110 // inline functions implementation
1111 // ----------------------------------------------------------------------------
1112
1113 #if WXWIN_COMPATIBILITY_2_8
1114
1115 inline void wxSizerItem::SetWindow(wxWindow *window)
1116 {
1117     DoSetWindow(window);
1118 }
1119
1120 inline void wxSizerItem::SetSizer(wxSizer *sizer)
1121 {
1122     DoSetSizer(sizer);
1123 }
1124
1125 inline void wxSizerItem::SetSpacer(const wxSize& size)
1126 {
1127     DoSetSpacer(size);
1128 }
1129
1130 inline void wxSizerItem::SetSpacer(int width, int height)
1131 {
1132     DoSetSpacer(wxSize(width, height));
1133 }
1134
1135 #endif // WXWIN_COMPATIBILITY_2_8
1136
1137 inline wxSizerItem*
1138 wxSizer::Insert(size_t index, wxSizerItem *item)
1139 {
1140     return DoInsert(index, item);
1141 }
1142
1143
1144 inline wxSizerItem*
1145 wxSizer::Add( wxSizerItem *item )
1146 {
1147     return Insert( m_children.GetCount(), item );
1148 }
1149
1150 inline wxSizerItem*
1151 wxSizer::Add( wxWindow *window, int proportion, int flag, int border, wxObject* userData )
1152 {
1153     return Add( new wxSizerItem( window, proportion, flag, border, userData ) );
1154 }
1155
1156 inline wxSizerItem*
1157 wxSizer::Add( wxSizer *sizer, int proportion, int flag, int border, wxObject* userData )
1158 {
1159     return Add( new wxSizerItem( sizer, proportion, flag, border, userData ) );
1160 }
1161
1162 inline wxSizerItem*
1163 wxSizer::Add( int width, int height, int proportion, int flag, int border, wxObject* userData )
1164 {
1165     return Add( new wxSizerItem( width, height, proportion, flag, border, userData ) );
1166 }
1167
1168 inline wxSizerItem*
1169 wxSizer::Add( wxWindow *window, const wxSizerFlags& flags )
1170 {
1171     return Add( new wxSizerItem(window, flags) );
1172 }
1173
1174 inline wxSizerItem*
1175 wxSizer::Add( wxSizer *sizer, const wxSizerFlags& flags )
1176 {
1177     return Add( new wxSizerItem(sizer, flags) );
1178 }
1179
1180 inline wxSizerItem*
1181 wxSizer::Add( int width, int height, const wxSizerFlags& flags )
1182 {
1183     return Add( new wxSizerItem(width, height, flags) );
1184 }
1185
1186 inline wxSizerItem*
1187 wxSizer::AddSpacer(int size)
1188 {
1189     return Add(size, size);
1190 }
1191
1192 inline wxSizerItem*
1193 wxSizer::AddStretchSpacer(int prop)
1194 {
1195     return Add(0, 0, prop);
1196 }
1197
1198 inline wxSizerItem*
1199 wxSizer::Prepend( wxSizerItem *item )
1200 {
1201     return Insert( 0, item );
1202 }
1203
1204 inline wxSizerItem*
1205 wxSizer::Prepend( wxWindow *window, int proportion, int flag, int border, wxObject* userData )
1206 {
1207     return Prepend( new wxSizerItem( window, proportion, flag, border, userData ) );
1208 }
1209
1210 inline wxSizerItem*
1211 wxSizer::Prepend( wxSizer *sizer, int proportion, int flag, int border, wxObject* userData )
1212 {
1213     return Prepend( new wxSizerItem( sizer, proportion, flag, border, userData ) );
1214 }
1215
1216 inline wxSizerItem*
1217 wxSizer::Prepend( int width, int height, int proportion, int flag, int border, wxObject* userData )
1218 {
1219     return Prepend( new wxSizerItem( width, height, proportion, flag, border, userData ) );
1220 }
1221
1222 inline wxSizerItem*
1223 wxSizer::PrependSpacer(int size)
1224 {
1225     return Prepend(size, size);
1226 }
1227
1228 inline wxSizerItem*
1229 wxSizer::PrependStretchSpacer(int prop)
1230 {
1231     return Prepend(0, 0, prop);
1232 }
1233
1234 inline wxSizerItem*
1235 wxSizer::Prepend( wxWindow *window, const wxSizerFlags& flags )
1236 {
1237     return Prepend( new wxSizerItem(window, flags) );
1238 }
1239
1240 inline wxSizerItem*
1241 wxSizer::Prepend( wxSizer *sizer, const wxSizerFlags& flags )
1242 {
1243     return Prepend( new wxSizerItem(sizer, flags) );
1244 }
1245
1246 inline wxSizerItem*
1247 wxSizer::Prepend( int width, int height, const wxSizerFlags& flags )
1248 {
1249     return Prepend( new wxSizerItem(width, height, flags) );
1250 }
1251
1252 inline wxSizerItem*
1253 wxSizer::Insert( size_t index,
1254                  wxWindow *window,
1255                  int proportion,
1256                  int flag,
1257                  int border,
1258                  wxObject* userData )
1259 {
1260     return Insert( index, new wxSizerItem( window, proportion, flag, border, userData ) );
1261 }
1262
1263 inline wxSizerItem*
1264 wxSizer::Insert( size_t index,
1265                  wxSizer *sizer,
1266                  int proportion,
1267                  int flag,
1268                  int border,
1269                  wxObject* userData )
1270 {
1271     return Insert( index, new wxSizerItem( sizer, proportion, flag, border, userData ) );
1272 }
1273
1274 inline wxSizerItem*
1275 wxSizer::Insert( size_t index,
1276                  int width,
1277                  int height,
1278                  int proportion,
1279                  int flag,
1280                  int border,
1281                  wxObject* userData )
1282 {
1283     return Insert( index, new wxSizerItem( width, height, proportion, flag, border, userData ) );
1284 }
1285
1286 inline wxSizerItem*
1287 wxSizer::Insert( size_t index, wxWindow *window, const wxSizerFlags& flags )
1288 {
1289     return Insert( index, new wxSizerItem(window, flags) );
1290 }
1291
1292 inline wxSizerItem*
1293 wxSizer::Insert( size_t index, wxSizer *sizer, const wxSizerFlags& flags )
1294 {
1295     return Insert( index, new wxSizerItem(sizer, flags) );
1296 }
1297
1298 inline wxSizerItem*
1299 wxSizer::Insert( size_t index, int width, int height, const wxSizerFlags& flags )
1300 {
1301     return Insert( index, new wxSizerItem(width, height, flags) );
1302 }
1303
1304 inline wxSizerItem*
1305 wxSizer::InsertSpacer(size_t index, int size)
1306 {
1307     return Insert(index, size, size);
1308 }
1309
1310 inline wxSizerItem*
1311 wxSizer::InsertStretchSpacer(size_t index, int prop)
1312 {
1313     return Insert(index, 0, 0, prop);
1314 }
1315
1316 #endif // __WXSIZER_H__