interface/wx/sizer.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        sizer.h
   3 // Purpose:     interface of wxStdDialogButtonSizer
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9
  10 /**
  11     A generic orientation value.
  12 */
  13 enum wxOrientation
  14 {
  15     /* don't change the values of these elements, they are used elsewhere */
  16     wxHORIZONTAL              = 0x0004,
  17     wxVERTICAL                = 0x0008,
  18
  19     wxBOTH                    = wxVERTICAL | wxHORIZONTAL,
  20
  21     /*  a mask to extract orientation from the combination of flags */
  22     wxORIENTATION_MASK        = wxBOTH
  23 };
  24
  25
  26 /**
  27     @class wxStdDialogButtonSizer
  28
  29     This class creates button layouts which conform to the standard button spacing
  30     and ordering defined by the platform or toolkit's user interface guidelines
  31     (if such things exist). By using this class, you can ensure that all your
  32     standard dialogs look correct on all major platforms. Currently it conforms to
  33     the Windows, GTK+ and Mac OS X human interface guidelines.
  34
  35     When there aren't interface guidelines defined for a particular platform or
  36     toolkit, wxStdDialogButtonSizer reverts to the Windows implementation.
  37
  38     To use this class, first add buttons to the sizer by calling
  39     wxStdDialogButtonSizer::AddButton (or wxStdDialogButtonSizer::SetAffirmativeButton,
  40     wxStdDialogButtonSizer::SetNegativeButton or wxStdDialogButtonSizer::SetCancelButton)
  41     and then call Realize in order to create the actual button layout used.
  42     Other than these special operations, this sizer works like any other sizer.
  43
  44     If you add a button with wxID_SAVE, on Mac OS X the button will be renamed to
  45     "Save" and the wxID_NO button will be renamed to "Don't Save" in accordance
  46     with the Mac OS X Human Interface Guidelines.
  47
  48     @library{wxcore}
  49     @category{winlayout}
  50
  51     @see wxSizer, @ref overview_sizer, wxDialog::CreateButtonSizer
  52 */
  53 class wxStdDialogButtonSizer : public wxBoxSizer
  54 {
  55 public:
  56     /**
  57         Constructor for a wxStdDialogButtonSizer.
  58     */
  59     wxStdDialogButtonSizer();
  60
  61     /**
  62         Adds a button to the wxStdDialogButtonSizer. The @a button must have
  63         one of the following identifiers:
  64          - wxID_OK
  65          - wxID_YES
  66          - wxID_SAVE
  67          - wxID_APPLY
  68          - wxID_CLOSE
  69          - wxID_NO
  70          - wxID_CANCEL
  71          - wxID_HELP
  72          - wxID_CONTEXT_HELP
  73     */
  74     void AddButton(wxButton* button);
  75
  76     /**
  77         Rearranges the buttons and applies proper spacing between buttons to make
  78         them match the platform or toolkit's interface guidelines.
  79     */
  80     void Realize();
  81
  82     /**
  83         Sets the affirmative button for the sizer.
  84
  85         This allows you to use identifiers other than the standard identifiers
  86         outlined above.
  87     */
  88     void SetAffirmativeButton(wxButton* button);
  89
  90     /**
  91         Sets the cancel button for the sizer.
  92
  93         This allows you to use identifiers other than the standard identifiers
  94         outlined above.
  95     */
  96     void SetCancelButton(wxButton* button);
  97
  98     /**
  99         Sets the negative button for the sizer.
 100
 101         This allows you to use identifiers other than the standard identifiers
 102         outlined above.
 103     */
 104     void SetNegativeButton(wxButton* button);
 105 };
 106
 107
 108
 109 /**
 110     @class wxSizerItem
 111
 112     The wxSizerItem class is used to track the position, size and other
 113     attributes of each item managed by a wxSizer.
 114
 115     It is not usually necessary to use this class because the sizer elements can
 116     also be identified by their positions or window or sizer pointers but sometimes
 117     it may be more convenient to use it directly.
 118
 119     @library{wxcore}
 120     @category{winlayout}
 121 */
 122 class wxSizerItem : public wxObject
 123 {
 124 public:
 125     /**
 126         Construct a sizer item for tracking a spacer.
 127     */
 128     wxSizerItem(int width, int height, int proportion, int flag,
 129                 int border, wxObject* userData);
 130
 131     //@{
 132     /**
 133         Construct a sizer item for tracking a window.
 134     */
 135     wxSizerItem(wxWindow* window, const wxSizerFlags& flags);
 136     wxSizerItem(wxWindow* window, int proportion, int flag,
 137                 int border,
 138                 wxObject* userData);
 139     //@}
 140
 141     //@{
 142     /**
 143         Construct a sizer item for tracking a subsizer.
 144     */
 145     wxSizerItem(wxSizer* window, const wxSizerFlags& flags);
 146     wxSizerItem(wxSizer* sizer, int proportion, int flag,
 147                 int border,
 148                 wxObject* userData);
 149     //@}
 150
 151     /**
 152         Deletes the user data and subsizer, if any.
 153     */
 154     virtual ~wxSizerItem();
 155
 156     /**
 157         Calculates the minimum desired size for the item, including any space
 158         needed by borders.
 159     */
 160     virtual wxSize CalcMin();
 161
 162     /**
 163         Destroy the window or the windows in a subsizer, depending on the type
 164         of item.
 165     */
 166     virtual void DeleteWindows();
 167
 168     /**
 169         Enable deleting the SizerItem without destroying the contained sizer.
 170     */
 171     void DetachSizer();
 172
 173     /**
 174         Return the border attribute.
 175     */
 176     int GetBorder() const;
 177
 178     /**
 179         Return the flags attribute.
 180
 181         See @ref wxsizer_flags "wxSizer flags list" for details.
 182     */
 183     int GetFlag() const;
 184
 185     /**
 186         Return the numeric id of wxSizerItem, or @c wxID_NONE if the id has
 187         not been set.
 188     */
 189     int GetId() const;
 190
 191     /**
 192         Get the minimum size needed for the item.
 193     */
 194     wxSize GetMinSize() const;
 195
 196     /**
 197         Sets the minimum size to be allocated for this item.
 198
 199         If this item is a window, the @a size is also passed to
 200         wxWindow::SetMinSize().
 201      */
 202     void SetMinSize(const wxSize& size);
 203
 204     /**
 205         @overload
 206      */
 207     void SetMinSize(int x, int y);
 208
 209     /**
 210         What is the current position of the item, as set in the last Layout.
 211     */
 212     wxPoint GetPosition() const;
 213
 214     /**
 215         Get the proportion item attribute.
 216     */
 217     int GetProportion() const;
 218
 219     /**
 220         Get the ration item attribute.
 221     */
 222     float GetRatio() const;
 223
 224     /**
 225         Get the rectangle of the item on the parent window, excluding borders.
 226     */
 227     virtual wxRect GetRect();
 228
 229     /**
 230         Get the current size of the item, as set in the last Layout.
 231     */
 232     virtual wxSize GetSize() const;
 233
 234     /**
 235         If this item is tracking a sizer, return it.  @NULL otherwise.
 236     */
 237     wxSizer* GetSizer() const;
 238
 239     /**
 240         If this item is tracking a spacer, return its size.
 241     */
 242     const wxSize GetSpacer() const;
 243
 244     /**
 245         Get the userData item attribute.
 246     */
 247     wxObject* GetUserData() const;
 248
 249     /**
 250         If this item is tracking a window then return it. @NULL otherwise.
 251     */
 252     wxWindow* GetWindow() const;
 253
 254     /**
 255         Returns @true if this item is a window or a spacer and it is shown or
 256         if this item is a sizer and not all of its elements are hidden.
 257
 258         In other words, for sizer items, all of the child elements must be
 259         hidden for the sizer itself to be considered hidden.
 260
 261         As an exception, if the @c wxRESERVE_SPACE_EVEN_IF_HIDDEN flag was
 262         used for this sizer item, then IsShown() always returns @true for it
 263         (see wxSizerFlags::ReserveSpaceEvenIfHidden()).
 264     */
 265     bool IsShown() const;
 266
 267     /**
 268         Is this item a sizer?
 269     */
 270     bool IsSizer() const;
 271
 272     /**
 273         Is this item a spacer?
 274     */
 275     bool IsSpacer() const;
 276
 277     /**
 278         Is this item a window?
 279     */
 280     bool IsWindow() const;
 281
 282     /**
 283         Set the border item attribute.
 284     */
 285     void SetBorder(int border);
 286
 287     /**
 288         Set the position and size of the space allocated to the sizer, and
 289         adjust the position and size of the item to be within that space
 290         taking alignment and borders into account.
 291     */
 292     virtual void SetDimension(const wxPoint& pos, const wxSize& size);
 293
 294     /**
 295         Set the flag item attribute.
 296     */
 297     void SetFlag(int flag);
 298
 299     /**
 300         Sets the numeric id of the wxSizerItem to @e id.
 301     */
 302     void SetId(int id);
 303
 304     /**
 305         @todo docme.
 306     */
 307     void SetInitSize(int x, int y);
 308
 309     /**
 310         Set the proportion item attribute.
 311     */
 312     void SetProportion(int proportion);
 313
 314     //@{
 315     /**
 316         Set the ratio item attribute.
 317     */
 318     void SetRatio(int width, int height);
 319     void SetRatio(wxSize size);
 320     void SetRatio(float ratio);
 321     //@}
 322
 323     /**
 324         Set the sizer tracked by this item.
 325         @deprecated @todo provide deprecation description
 326     */
 327     void SetSizer(wxSizer* sizer);
 328
 329     /**
 330         Set the size of the spacer tracked by this item.
 331         @deprecated @todo provide deprecation description
 332     */
 333     void SetSpacer(const wxSize& size);
 334
 335     /**
 336         Set the window to be tracked by this item.
 337         @deprecated @todo provide deprecation description
 338     */
 339     void SetWindow(wxWindow* window);
 340
 341     /**
 342         Set the show item attribute, which sizers use to determine if the item
 343         is to be made part of the layout or not. If the item is tracking a
 344         window then it is shown or hidden as needed.
 345     */
 346     void Show(bool show);
 347 };
 348
 349
 350
 351 /**
 352     @class wxSizerFlags
 353
 354     Container for sizer items flags providing readable names for them.
 355
 356     Normally, when you add an item to a sizer via wxSizer::Add, you have to
 357     specify a lot of flags and parameters which can be unwieldy. This is where
 358     wxSizerFlags comes in: it allows you to specify all parameters using the
 359     named methods instead. For example, instead of
 360
 361     @code
 362     sizer->Add(ctrl, 0, wxEXPAND | wxALL, 10);
 363     @endcode
 364
 365     you can now write
 366
 367     @code
 368     sizer->Add(ctrl, wxSizerFlags().Expand().Border(wxALL, 10));
 369     @endcode
 370
 371     This is more readable and also allows you to create wxSizerFlags objects which
 372     can be reused for several sizer items.
 373
 374     @code
 375     wxSizerFlags flagsExpand(1);
 376         flagsExpand.Expand().Border(wxALL, 10);
 377
 378         sizer->Add(ctrl1, flagsExpand);
 379         sizer->Add(ctrl2, flagsExpand);
 380     @endcode
 381
 382     Note that by specification, all methods of wxSizerFlags return the wxSizerFlags
 383     object itself to allowing chaining multiple methods calls like in the examples
 384     above.
 385
 386     @library{wxcore}
 387     @category{winlayout}
 388
 389     @see wxSizer
 390 */
 391 class wxSizerFlags
 392 {
 393 public:
 394     /**
 395         Creates the wxSizer with the proportion specified by @a proportion.
 396     */
 397     wxSizerFlags(int proportion = 0);
 398
 399     /**
 400         Sets the alignment of this wxSizerFlags to @a align.
 401
 402         This method replaces the previously set alignment with the specified one.
 403
 404         @param align
 405             Combination of @c wxALIGN_XXX bit masks.
 406
 407         @see Top(), Left(), Right(), Bottom(), Centre()
 408     */
 409     wxSizerFlags& Align(int align = 0);
 410
 411     /**
 412         Sets the wxSizerFlags to have a border of a number of pixels specified
 413         by @a borderinpixels with the directions specified by @a direction.
 414     */
 415     wxSizerFlags& Border(int direction, int borderinpixels);
 416
 417     /**
 418         Sets the wxSizerFlags to have a border with size as returned by
 419         GetDefaultBorder().
 420
 421         @param direction
 422             Direction(s) to apply the border in.
 423     */
 424     wxSizerFlags& Border(int direction = wxALL);
 425
 426     /**
 427         Aligns the object to the bottom, similar for @c Align(wxALIGN_BOTTOM).
 428
 429         Unlike Align(), this method doesn't change the horizontal alignment of
 430         the item.
 431     */
 432     wxSizerFlags& Bottom();
 433
 434     /**
 435         Sets the object of the wxSizerFlags to center itself in the area it is
 436         given.
 437     */
 438     wxSizerFlags& Center();
 439
 440     /**
 441         Center() for people with the other dialect of English.
 442     */
 443     wxSizerFlags& Centre();
 444
 445     /**
 446         Sets the border in the given @a direction having twice the default
 447         border size.
 448     */
 449     wxSizerFlags& DoubleBorder(int direction = wxALL);
 450
 451     /**
 452         Sets the border in left and right directions having twice the default
 453         border size.
 454     */
 455     wxSizerFlags& DoubleHorzBorder();
 456
 457     /**
 458         Sets the object of the wxSizerFlags to expand to fill as much area as
 459         it can.
 460     */
 461     wxSizerFlags& Expand();
 462
 463     /**
 464         Set the @c wxFIXED_MINSIZE flag which indicates that the initial size
 465         of the window should be also set as its minimal size.
 466     */
 467     wxSizerFlags& FixedMinSize();
 468
 469     /**
 470         Set the @c wxRESERVE_SPACE_EVEN_IF_HIDDEN flag. Normally wxSizers
 471         don't allocate space for hidden windows or other items. This flag
 472         overrides this behavior so that sufficient space is allocated for the
 473         window even if it isn't visible. This makes it possible to dynamically
 474         show and hide controls without resizing parent dialog, for example.
 475
 476         @since 2.8.8
 477     */
 478     wxSizerFlags& ReserveSpaceEvenIfHidden();
 479
 480     /**
 481         Returns the border used by default in Border() method.
 482     */
 483     static int GetDefaultBorder();
 484
 485     /**
 486         Aligns the object to the left, similar for @c Align(wxALIGN_LEFT).
 487
 488         Unlike Align(), this method doesn't change the vertical alignment of
 489         the item.
 490     */
 491     wxSizerFlags& Left();
 492
 493     /**
 494         Sets the proportion of this wxSizerFlags to @e proportion
 495     */
 496     wxSizerFlags& Proportion(int proportion = 0);
 497
 498     /**
 499         Aligns the object to the right, similar for @c Align(wxALIGN_RIGHT).
 500
 501         Unlike Align(), this method doesn't change the vertical alignment of
 502         the item.
 503     */
 504     wxSizerFlags& Right();
 505
 506     /**
 507         Set the @c wx_SHAPED flag which indicates that the elements should
 508         always keep the fixed width to height ratio equal to its original value.
 509     */
 510     wxSizerFlags& Shaped();
 511
 512     /**
 513         Aligns the object to the top, similar for @c Align(wxALIGN_TOP).
 514
 515         Unlike Align(), this method doesn't change the horizontal alignment of
 516         the item.
 517     */
 518     wxSizerFlags& Top();
 519
 520     /**
 521         Sets the border in the given @a direction having thrice the default
 522         border size.
 523     */
 524     wxSizerFlags& TripleBorder(int direction = wxALL);
 525 };
 526
 527
 528
 529 /**
 530     @class wxNotebookSizer
 531
 532     @deprecated
 533     This class is deprecated and should not be used in new code! It is no
 534     longer needed, wxNotebook control can be inserted
 535     into any sizer class and its minimal size will be determined correctly.
 536
 537     wxNotebookSizer is a specialized sizer to make sizers work in connection
 538     with using notebooks. This sizer is different from any other sizer as you
 539     must not add any children to it - instead, it queries the notebook class
 540     itself.  The only thing this sizer does is to determine the size of the
 541     biggest page of the notebook and report an adjusted minimal size to a more
 542     toplevel sizer.
 543
 544     @library{wxbase}
 545     @category{winlayout}
 546
 547     @see wxSizer, wxNotebook,
 548          @ref overview_sizer "Sizers overview"
 549 */
 550 class wxNotebookSizer : public wxSizer
 551 {
 552 public:
 553     /**
 554         Constructor. It takes an associated notebook as its only parameter.
 555     */
 556     wxNotebookSizer(wxNotebook* notebook);
 557
 558     /**
 559         Returns the notebook associated with the sizer.
 560     */
 561     wxNotebook* GetNotebook();
 562 };
 563
 564
 565
 566 /**
 567     @class wxFlexGridSizer
 568
 569     A flex grid sizer is a sizer which lays out its children in a two-dimensional
 570     table with all table fields in one row having the same height and all fields
 571     in one column having the same width, but all rows or all columns are not
 572     necessarily the same height or width as in the wxGridSizer.
 573
 574     Since wxWidgets 2.5.0, wxFlexGridSizer can also size items equally in one
 575     direction but unequally ("flexibly") in the other. If the sizer is only
 576     flexible in one direction (this can be changed using wxFlexGridSizer::SetFlexibleDirection),
 577     it needs to be decided how the sizer should grow in the other ("non-flexible")
 578     direction in order to fill the available space.
 579     The wxFlexGridSizer::SetNonFlexibleGrowMode() method serves this purpose.
 580
 581     @library{wxcore}
 582     @category{winlayout}
 583
 584     @see wxSizer, @ref overview_sizer
 585 */
 586 class wxFlexGridSizer : public wxGridSizer
 587 {
 588 public:
 589     //@{
 590     /**
 591         Constructor for a wxFlexGridSizer.
 592
 593         @a rows and @a cols determine the number of columns and rows in the sizer -
 594         if either of the parameters is zero, it will be calculated to form the
 595         total number of children in the sizer, thus making the sizer grow
 596         dynamically.
 597
 598         @a vgap and @a hgap define extra space between all children.
 599     */
 600     wxFlexGridSizer(int rows, int cols, int vgap, int hgap);
 601     wxFlexGridSizer(int cols, int vgap = 0, int hgap = 0);
 602     //@}
 603
 604     /**
 605         Specifies that column @a idx (starting from zero) should be grown if
 606         there is extra space available to the sizer.
 607
 608         The @a proportion parameter has the same meaning as the stretch factor
 609         for the sizers() except that if all proportions are 0, then all columns
 610         are resized equally (instead of not being resized at all).
 611
 612         Notice that the row must not be already growable, if you need to change
 613         the proportion you must call RemoveGrowableCol() first and then make it
 614         growable (with a different proportion) again. You can use IsColGrowable()
 615         to check whether a column is already growable.
 616     */
 617     void AddGrowableCol(size_t idx, int proportion = 0);
 618
 619     /**
 620         Specifies that row idx (starting from zero) should be grown if there
 621         is extra space available to the sizer.
 622
 623         This is identical to AddGrowableCol() except that it works with rows
 624         and not columns.
 625     */
 626     void AddGrowableRow(size_t idx, int proportion = 0);
 627
 628     /**
 629         Returns a wxOrientation value that specifies whether the sizer flexibly
 630         resizes its columns, rows, or both (default).
 631
 632         @return
 633             One of the following values:
 634             - wxVERTICAL: Rows are flexibly sized.
 635             - wxHORIZONTAL: Columns are flexibly sized.
 636             - wxBOTH: Both rows and columns are flexibly sized (this is the default value).
 637
 638         @see SetFlexibleDirection()
 639     */
 640     int GetFlexibleDirection() const;
 641
 642     /**
 643         Returns the value that specifies how the sizer grows in the "non-flexible"
 644         direction if there is one.
 645
 646         @return
 647             One of the following values:
 648             - wxFLEX_GROWMODE_NONE: Sizer doesn't grow in the non-flexible direction.
 649             - wxFLEX_GROWMODE_SPECIFIED: Sizer honors growable columns/rows set with
 650               AddGrowableCol() and AddGrowableRow(). In this case equal sizing applies
 651               to minimum sizes of columns or rows (this is the default value).
 652             - wxFLEX_GROWMODE_ALL: Sizer equally stretches all columns or rows in
 653               the non-flexible direction, whether they are growable or not in the
 654               flexible direction.
 655
 656         @see SetFlexibleDirection(), SetNonFlexibleGrowMode()
 657     */
 658     int GetNonFlexibleGrowMode() const;
 659
 660     /**
 661         Returns @true if column @a idx is growable.
 662
 663         @since 2.9.0
 664     */
 665     bool IsColGrowable(size_t idx);
 666
 667     /**
 668         Returns @true if row @a idx is growable.
 669
 670         @since 2.9.0
 671     */
 672     bool IsRowGrowable(size_t idx);
 673
 674     /**
 675         Specifies that column idx is no longer growable.
 676     */
 677     void RemoveGrowableCol(size_t idx);
 678
 679     /**
 680         Specifies that row idx is no longer growable.
 681     */
 682     void RemoveGrowableRow(size_t idx);
 683
 684     /**
 685         Specifies whether the sizer should flexibly resize its columns, rows, or both.
 686
 687         Argument @a direction can be @c wxVERTICAL, @c wxHORIZONTAL or @c wxBOTH
 688         (which is the default value). Any other value is ignored.
 689         See GetFlexibleDirection() for the explanation of these values.
 690         Note that this method does not trigger relayout.
 691     */
 692     void SetFlexibleDirection(int direction);
 693
 694     /**
 695         Specifies how the sizer should grow in the non-flexible direction if
 696         there is one (so SetFlexibleDirection() must have been called previously).
 697
 698         Argument @a mode can be one of those documented in GetNonFlexibleGrowMode(),
 699         please see there for their explanation.
 700         Note that this method does not trigger relayout.
 701     */
 702     void SetNonFlexibleGrowMode(wxFlexSizerGrowMode mode);
 703 };
 704
 705
 706
 707 /**
 708     @class wxSizer
 709
 710     wxSizer is the abstract base class used for laying out subwindows in a window.
 711     You cannot use wxSizer directly; instead, you will have to use one of the sizer
 712     classes derived from it. Currently there are wxBoxSizer, wxStaticBoxSizer,
 713     wxGridSizer, wxFlexGridSizer, wxWrapSizer and wxGridBagSizer.
 714
 715     The layout algorithm used by sizers in wxWidgets is closely related to layout
 716     in other GUI toolkits, such as Java's AWT, the GTK toolkit or the Qt toolkit.
 717     It is based upon the idea of the individual subwindows reporting their minimal
 718     required size and their ability to get stretched if the size of the parent window
 719     has changed.
 720
 721     This will most often mean that the programmer does not set the original size of
 722     a dialog in the beginning, rather the dialog will be assigned a sizer and this
 723     sizer will be queried about the recommended size. The sizer in turn will query
 724     its children, which can be normal windows, empty space or other sizers, so that
 725     a hierarchy of sizers can be constructed. Note that wxSizer does not derive
 726     from wxWindow and thus does not interfere with tab ordering and requires very little
 727     resources compared to a real window on screen.
 728
 729     What makes sizers so well fitted for use in wxWidgets is the fact that every
 730     control reports its own minimal size and the algorithm can handle differences in
 731     font sizes or different window (dialog item) sizes on different platforms without
 732     problems. If e.g. the standard font as well as the overall design of Motif widgets
 733     requires more space than on Windows, the initial dialog size will automatically
 734     be bigger on Motif than on Windows.
 735
 736     Sizers may also be used to control the layout of custom drawn items on the
 737     window. The wxSizer::Add(), wxSizer::Insert(), and wxSizer::Prepend() functions
 738     return a pointer to the newly added wxSizerItem.
 739     Just add empty space of the desired size and attributes, and then use the
 740     wxSizerItem::GetRect() method to determine where the drawing operations
 741     should take place.
 742
 743     Please notice that sizers, like child windows, are owned by the library and
 744     will be deleted by it which implies that they must be allocated on the heap.
 745     However if you create a sizer and do not add it to another sizer or
 746     window, the library wouldn't be able to delete such an orphan sizer and in
 747     this, and only this, case it should be deleted explicitly.
 748
 749     @beginWxPythonOnly
 750     If you wish to create a sizer class in wxPython you should
 751     derive the class from @c wxPySizer in order to get Python-aware
 752     capabilities for the various virtual methods.
 753     @endWxPythonOnly
 754
 755     @anchor wxsizer_flags
 756     @par wxSizer flags
 757
 758     The "flag" argument accepted by wxSizeItem constructors and other
 759     functions, e.g. wxSizer::Add(), is OR-combination of the following flags.
 760     Two main behaviours are defined using these flags. One is the border around
 761     a window: the border parameter determines the border width whereas the
 762     flags given here determine which side(s) of the item that the border will
 763     be added.  The other flags determine how the sizer item behaves when the
 764     space allotted to the sizer changes, and is somewhat dependent on the
 765     specific kind of sizer used.
 766
 767     @beginDefList
 768     @itemdef{wxTOP<br>
 769              wxBOTTOM<br>
 770              wxLEFT<br>
 771              wxRIGHT<br>
 772              wxALL,
 773              These flags are used to specify which side(s) of the sizer item
 774              the border width will apply to.}
 775     @itemdef{wxEXPAND,
 776              The item will be expanded to fill the space assigned to the item.}
 777     @itemdef{wxSHAPED,
 778              The item will be expanded as much as possible while also
 779              maintaining its aspect ratio.}
 780     @itemdef{wxFIXED_MINSIZE,
 781              Normally wxSizers will use GetAdjustedBestSize() to determine what
 782              the minimal size of window items should be, and will use that size
 783              to calculate the layout. This allows layouts to adjust when an
 784              item changes and its best size becomes different. If you would
 785              rather have a window item stay the size it started with then use
 786              wxFIXED_MINSIZE.}
 787     @itemdef{wxRESERVE_SPACE_EVEN_IF_HIDDEN,
 788              Normally wxSizers don't allocate space for hidden windows or other
 789              items. This flag overrides this behavior so that sufficient space
 790              is allocated for the window even if it isn't visible. This makes
 791              it possible to dynamically show and hide controls without resizing
 792              parent dialog, for example. (Available since 2.8.8.)
 793              }
 794     @itemdef{wxALIGN_CENTER<br>
 795              wxALIGN_CENTRE<br>
 796              wxALIGN_LEFT<br>
 797              wxALIGN_RIGHT<br>
 798              wxALIGN_TOP<br>
 799              wxALIGN_BOTTOM<br>
 800              wxALIGN_CENTER_VERTICAL<br>
 801              wxALIGN_CENTRE_VERTICAL<br>
 802              wxALIGN_CENTER_HORIZONTAL<br>
 803              wxALIGN_CENTRE_HORIZONTAL,
 804              The wxALIGN flags allow you to specify the alignment of the item
 805              within the space allotted to it by the sizer, adjusted for the
 806              border if any.}
 807     @endDefList
 808
 809     @library{wxcore}
 810     @category{winlayout}
 811
 812     @see @ref overview_sizer
 813 */
 814 class wxSizer : public wxObject
 815 {
 816 public:
 817     /**
 818         The constructor.
 819         Note that wxSizer is an abstract base class and may not be instantiated.
 820     */
 821     wxSizer();
 822
 823     /**
 824         The destructor.
 825     */
 826     virtual ~wxSizer();
 827
 828     /**
 829         Appends a child to the sizer.
 830
 831         wxSizer itself is an abstract class, but the parameters are equivalent
 832         in the derived classes that you will instantiate to use it so they are
 833         described here:
 834
 835         @param window
 836             The window to be added to the sizer. Its initial size (either set
 837             explicitly by the user or calculated internally when using
 838             wxDefaultSize) is interpreted as the minimal and in many cases also
 839             the initial size.
 840         @param flags
 841             A wxSizerFlags object that enables you to specify most of the above
 842             parameters more conveniently.
 843     */
 844     wxSizerItem* Add(wxWindow* window, const wxSizerFlags& flags);
 845
 846     /**
 847         Appends a child to the sizer.
 848
 849         wxSizer itself is an abstract class, but the parameters are equivalent
 850         in the derived classes that you will instantiate to use it so they are
 851         described here:
 852
 853         @param window
 854             The window to be added to the sizer. Its initial size (either set
 855             explicitly by the user or calculated internally when using
 856             wxDefaultSize) is interpreted as the minimal and in many cases also
 857             the initial size.
 858         @param proportion
 859             Although the meaning of this parameter is undefined in wxSizer, it
 860             is used in wxBoxSizer to indicate if a child of a sizer can change
 861             its size in the main orientation of the wxBoxSizer - where 0 stands
 862             for not changeable and a value of more than zero is interpreted
 863             relative to the value of other children of the same wxBoxSizer. For
 864             example, you might have a horizontal wxBoxSizer with three
 865             children, two of which are supposed to change their size with the
 866             sizer. Then the two stretchable windows would get a value of 1 each
 867             to make them grow and shrink equally with the sizer's horizontal
 868             dimension.
 869         @param flag
 870             OR-combination of flags affecting sizer's behavior. See
 871             @ref wxsizer_flags "wxSizer flags list" for details.
 872         @param border
 873             Determines the border width, if the flag parameter is set to
 874             include any border flag.
 875         @param userData
 876             Allows an extra object to be attached to the sizer item, for use in
 877             derived classes when sizing information is more complex than the
 878             proportion and flag will allow for.
 879     */
 880     wxSizerItem* Add(wxWindow* window,
 881                      int proportion = 0,
 882                      int flag = 0,
 883                      int border = 0,
 884                      wxObject* userData = NULL);
 885
 886     /**
 887         Appends a child to the sizer.
 888
 889         wxSizer itself is an abstract class, but the parameters are equivalent
 890         in the derived classes that you will instantiate to use it so they are
 891         described here:
 892
 893         @param sizer
 894             The (child-)sizer to be added to the sizer. This allows placing a
 895             child sizer in a sizer and thus to create hierarchies of sizers
 896             (typically a vertical box as the top sizer and several horizontal
 897             boxes on the level beneath).
 898         @param flags
 899             A wxSizerFlags object that enables you to specify most of the above
 900             parameters more conveniently.
 901     */
 902     wxSizerItem* Add(wxSizer* sizer, const wxSizerFlags& flags);
 903
 904     /**
 905         Appends a child to the sizer.
 906
 907         wxSizer itself is an abstract class, but the parameters are equivalent
 908         in the derived classes that you will instantiate to use it so they are
 909         described here:
 910
 911         @param sizer
 912             The (child-)sizer to be added to the sizer. This allows placing a
 913             child sizer in a sizer and thus to create hierarchies of sizers
 914             (typically a vertical box as the top sizer and several horizontal
 915             boxes on the level beneath).
 916         @param proportion
 917             Although the meaning of this parameter is undefined in wxSizer, it
 918             is used in wxBoxSizer to indicate if a child of a sizer can change
 919             its size in the main orientation of the wxBoxSizer - where 0 stands
 920             for not changeable and a value of more than zero is interpreted
 921             relative to the value of other children of the same wxBoxSizer. For
 922             example, you might have a horizontal wxBoxSizer with three
 923             children, two of which are supposed to change their size with the
 924             sizer. Then the two stretchable windows would get a value of 1 each
 925             to make them grow and shrink equally with the sizer's horizontal
 926             dimension.
 927         @param flag
 928             OR-combination of flags affecting sizer's behavior. See
 929             @ref wxsizer_flags "wxSizer flags list" for details.
 930         @param border
 931             Determines the border width, if the flag parameter is set to
 932             include any border flag.
 933         @param userData
 934             Allows an extra object to be attached to the sizer item, for use in
 935             derived classes when sizing information is more complex than the
 936             proportion and flag will allow for.
 937     */
 938     wxSizerItem* Add(wxSizer* sizer,
 939                      int proportion = 0,
 940                      int flag = 0,
 941                      int border = 0,
 942                      wxObject* userData = NULL);
 943
 944     /**
 945         Appends a spacer child to the sizer.
 946
 947         wxSizer itself is an abstract class, but the parameters are equivalent
 948         in the derived classes that you will instantiate to use it so they are
 949         described here.
 950
 951         @a width and @a height specify the dimension of a spacer to be added to
 952         the sizer. Adding spacers to sizers gives more flexibility in the
 953         design of dialogs; imagine for example a horizontal box with two
 954         buttons at the bottom of a dialog: you might want to insert a space
 955         between the two buttons and make that space stretchable using the
 956         proportion flag and the result will be that the left button will be
 957         aligned with the left side of the dialog and the right button with the
 958         right side - the space in between will shrink and grow with the dialog.
 959
 960         @param width
 961             Width of the spacer.
 962         @param height
 963             Height of the spacer.
 964         @param proportion
 965             Although the meaning of this parameter is undefined in wxSizer, it
 966             is used in wxBoxSizer to indicate if a child of a sizer can change
 967             its size in the main orientation of the wxBoxSizer - where 0 stands
 968             for not changeable and a value of more than zero is interpreted
 969             relative to the value of other children of the same wxBoxSizer. For
 970             example, you might have a horizontal wxBoxSizer with three
 971             children, two of which are supposed to change their size with the
 972             sizer. Then the two stretchable windows would get a value of 1 each
 973             to make them grow and shrink equally with the sizer's horizontal
 974             dimension.
 975         @param flag
 976             OR-combination of flags affecting sizer's behavior. See
 977             @ref wxsizer_flags "wxSizer flags list" for details.
 978         @param border
 979             Determines the border width, if the flag parameter is set to
 980             include any border flag.
 981         @param userData
 982             Allows an extra object to be attached to the sizer item, for use in
 983             derived classes when sizing information is more complex than the
 984             proportion and flag will allow for.
 985     */
 986     wxSizerItem* Add(int width, int height,
 987                      int proportion = 0,
 988                      int flag = 0,
 989                      int border = 0,
 990                      wxObject* userData = NULL);
 991
 992     /**
 993         Adds non-stretchable space to the sizer.
 994         More readable way of calling:
 995         @code
 996         wxSizer::Add(size, size, 0).
 997         @endcode
 998     */
 999     wxSizerItem* AddSpacer(int size);
1000
1001     /**
1002         Adds stretchable space to the sizer.
1003         More readable way of calling:
1004         @code
1005         wxSizer::Add(0, 0, prop).
1006         @endcode
1007     */
1008     wxSizerItem* AddStretchSpacer(int prop = 1);
1009
1010     /**
1011         This method is abstract and has to be overwritten by any derived class.
1012         Here, the sizer will do the actual calculation of its children's minimal sizes.
1013     */
1014     virtual wxSize CalcMin() = 0;
1015
1016     /**
1017         Detaches all children from the sizer.
1018         If @a delete_windows is @true then child windows will also be deleted.
1019     */
1020     virtual void Clear(bool delete_windows = false);
1021
1022     /**
1023         Computes client area size for @a window so that it matches the sizer's
1024         minimal size. Unlike GetMinSize(), this method accounts for other
1025         constraints imposed on @e window, namely display's size (returned size
1026         will never be too large for the display) and maximum window size if
1027         previously set by wxWindow::SetMaxSize().
1028
1029         The returned value is suitable for passing to wxWindow::SetClientSize() or
1030         wxWindow::SetMinClientSize().
1031
1032         @since 2.8.8
1033
1034         @see ComputeFittingWindowSize(), Fit()
1035     */
1036     wxSize ComputeFittingClientSize(wxWindow* window);
1037
1038     /**
1039         Like ComputeFittingClientSize(), but converts the result into window
1040         size. The returned value is suitable for passing to wxWindow::SetSize()
1041         or wxWindow::SetMinSize().
1042
1043         @since 2.8.8
1044
1045         @see ComputeFittingClientSize(), Fit()
1046     */
1047     wxSize ComputeFittingWindowSize(wxWindow* window);
1048
1049     /**
1050         Detach the child @a window from the sizer without destroying it.
1051
1052         This method does not cause any layout or resizing to take place, call Layout()
1053         to update the layout "on screen" after detaching a child from the sizer.
1054
1055         Returns @true if the child item was found and detached, @false otherwise.
1056
1057         @see Remove()
1058     */
1059     virtual bool Detach(wxWindow* window);
1060
1061     /**
1062         Detach the child @a sizer from the sizer without destroying it.
1063
1064         This method does not cause any layout or resizing to take place, call Layout()
1065         to update the layout "on screen" after detaching a child from the sizer.
1066
1067         Returns @true if the child item was found and detached, @false otherwise.
1068
1069         @see Remove()
1070     */
1071     virtual bool Detach(wxSizer* sizer);
1072
1073     /**
1074         Detach a item at position @a index from the sizer without destroying it.
1075
1076         This method does not cause any layout or resizing to take place, call Layout()
1077         to update the layout "on screen" after detaching a child from the sizer.
1078         Returns @true if the child item was found and detached, @false otherwise.
1079
1080         @see Remove()
1081     */
1082     bool Detach(size_t index);
1083
1084     /**
1085         Tell the sizer to resize the @a window so that its client area matches the
1086         sizer's minimal size (ComputeFittingClientSize() is called to determine it).
1087         This is commonly done in the constructor of the window itself, see sample
1088         in the description of wxBoxSizer.
1089
1090         @return The new window size.
1091
1092         @see ComputeFittingClientSize(), ComputeFittingWindowSize()
1093     */
1094     wxSize Fit(wxWindow* window);
1095
1096     /**
1097         Tell the sizer to resize the virtual size of the @a window to match the sizer's
1098         minimal size. This will not alter the on screen size of the window, but may
1099         cause the addition/removal/alteration of scrollbars required to view the virtual
1100         area in windows which manage it.
1101
1102         @see wxScrolled::SetScrollbars(), SetVirtualSizeHints()
1103     */
1104     void FitInside(wxWindow* window);
1105
1106     //@{
1107     /**
1108         Returns the list of the items in this sizer.
1109
1110         The elements of type-safe wxList @c wxSizerItemList are pointers to
1111         objects of type wxSizerItem.
1112     */
1113     wxSizerItemList& GetChildren();
1114     const wxSizerItemList& GetChildren() const;
1115     //@}
1116
1117     /**
1118         Returns the window this sizer is used in or @NULL if none.
1119     */
1120     wxWindow* GetContainingWindow() const;
1121
1122     /**
1123         Finds wxSizerItem which holds the given @a window.
1124         Use parameter @a recursive to search in subsizers too.
1125         Returns pointer to item or @NULL.
1126     */
1127     wxSizerItem* GetItem(wxWindow* window, bool recursive = false);
1128
1129     /**
1130         Finds wxSizerItem which holds the given @a sizer.
1131         Use parameter @a recursive to search in subsizers too.
1132         Returns pointer to item or @NULL.
1133     */
1134
1135     wxSizerItem* GetItem(wxSizer* sizer, bool recursive = false);
1136
1137     /**
1138         Finds wxSizerItem which is located in the sizer at position @a index.
1139         Use parameter @a recursive to search in subsizers too.
1140         Returns pointer to item or @NULL.
1141     */
1142     wxSizerItem* GetItem(size_t index);
1143
1144     /**
1145         Finds item of the sizer which has the given @e id.
1146         This @a id is not the window id but the id of the wxSizerItem itself.
1147         This is mainly useful for retrieving the sizers created from XRC resources.
1148         Use parameter @a recursive to search in subsizers too.
1149         Returns pointer to item or @NULL.
1150     */
1151     wxSizerItem* GetItemById(int id, bool recursive = false);
1152
1153     /**
1154         Returns the minimal size of the sizer.
1155
1156         This is either the combined minimal size of all the children and their
1157         borders or the minimal size set by SetMinSize(), depending on which is bigger.
1158         Note that the returned value is client size, not window size.
1159         In particular, if you use the value to set toplevel window's minimal or
1160         actual size, use wxWindow::SetMinClientSize() or wxWindow::SetClientSize(),
1161         not wxWindow::SetMinSize() or wxWindow::SetSize().
1162     */
1163     wxSize GetMinSize();
1164
1165     /**
1166         Returns the current position of the sizer.
1167     */
1168     wxPoint GetPosition() const;
1169
1170     /**
1171         Returns the current size of the sizer.
1172     */
1173     wxSize GetSize() const;
1174
1175     /**
1176         Hides the child @a window.
1177
1178         To make a sizer item disappear, use Hide() followed by Layout().
1179
1180         Use parameter @a recursive to hide elements found in subsizers.
1181         Returns @true if the child item was found, @false otherwise.
1182
1183         @see IsShown(), Show()
1184     */
1185     bool Hide(wxWindow* window, bool recursive = false);
1186
1187     /**
1188         Hides the child @a sizer.
1189
1190         To make a sizer item disappear, use Hide() followed by Layout().
1191
1192         Use parameter @a recursive to hide elements found in subsizers.
1193         Returns @true if the child item was found, @false otherwise.
1194
1195         @see IsShown(), Show()
1196     */
1197     bool Hide(wxSizer* sizer, bool recursive = false);
1198
1199     /**
1200         Hides the item at position @a index.
1201
1202         To make a sizer item disappear, use Hide() followed by Layout().
1203
1204         Use parameter @a recursive to hide elements found in subsizers.
1205         Returns @true if the child item was found, @false otherwise.
1206
1207         @see IsShown(), Show()
1208     */
1209     bool Hide(size_t index);
1210
1211     /**
1212         Insert a child into the sizer before any existing item at @a index.
1213
1214         See Add() for the meaning of the other parameters.
1215     */
1216     wxSizerItem* Insert(size_t index, wxWindow* window,
1217                         const wxSizerFlags& flags);
1218
1219     /**
1220         Insert a child into the sizer before any existing item at @a index.
1221
1222         See Add() for the meaning of the other parameters.
1223     */
1224     wxSizerItem* Insert(size_t index, wxWindow* window,
1225                         int proportion = 0,
1226                         int flag = 0,
1227                         int border = 0,
1228                         wxObject* userData = NULL);
1229
1230     /**
1231         Insert a child into the sizer before any existing item at @a index.
1232
1233         See Add() for the meaning of the other parameters.
1234     */
1235     wxSizerItem* Insert(size_t index, wxSizer* sizer,
1236                         const wxSizerFlags& flags);
1237
1238     /**
1239         Insert a child into the sizer before any existing item at @a index.
1240
1241         See Add() for the meaning of the other parameters.
1242     */
1243     wxSizerItem* Insert(size_t index, wxSizer* sizer,
1244                         int proportion = 0,
1245                         int flag = 0,
1246                         int border = 0,
1247                         wxObject* userData = NULL);
1248
1249     /**
1250         Insert a child into the sizer before any existing item at @a index.
1251
1252         See Add() for the meaning of the other parameters.
1253     */
1254     wxSizerItem* Insert(size_t index, int width, int height,
1255                         int proportion = 0,
1256                         int flag = 0,
1257                         int border = 0,
1258                         wxObject* userData = NULL);
1259
1260     /**
1261         Inserts non-stretchable space to the sizer.
1262         More readable way of calling wxSizer::Insert(size, size, 0).
1263     */
1264     wxSizerItem* InsertSpacer(size_t index, int size);
1265
1266     /**
1267         Inserts stretchable space to the sizer.
1268         More readable way of calling wxSizer::Insert(0, 0, prop).
1269     */
1270     wxSizerItem* InsertStretchSpacer(size_t index, int prop = 1);
1271
1272     /**
1273         Returns @true if the @a window is shown.
1274
1275         @see Hide(), Show(), wxSizerItem::IsShown()
1276     */
1277     bool IsShown(wxWindow* window) const;
1278
1279     /**
1280         Returns @true if the @a sizer is shown.
1281
1282         @see Hide(), Show(), wxSizerItem::IsShown()
1283     */
1284     bool IsShown(wxSizer* sizer) const;
1285
1286     /**
1287         Returns @true if the item at @a index is shown.
1288
1289         @see Hide(), Show(), wxSizerItem::IsShown()
1290     */
1291     bool IsShown(size_t index) const;
1292
1293     /**
1294         Call this to force layout of the children anew, e.g. after having added a child
1295         to or removed a child (window, other sizer or space) from the sizer while
1296         keeping the current dimension.
1297     */
1298     virtual void Layout();
1299
1300     /**
1301         Same as Add(), but prepends the items to the beginning of the
1302         list of items (windows, subsizers or spaces) owned by this sizer.
1303     */
1304     wxSizerItem* Prepend(wxWindow* window, const wxSizerFlags& flags);
1305
1306     /**
1307         Same as Add(), but prepends the items to the beginning of the
1308         list of items (windows, subsizers or spaces) owned by this sizer.
1309     */
1310     wxSizerItem* Prepend(wxWindow* window, int proportion = 0,
1311                          int flag = 0,
1312                          int border = 0,
1313                          wxObject* userData = NULL);
1314
1315     /**
1316         Same as Add(), but prepends the items to the beginning of the
1317         list of items (windows, subsizers or spaces) owned by this sizer.
1318     */
1319     wxSizerItem* Prepend(wxSizer* sizer,
1320                          const wxSizerFlags& flags);
1321
1322     /**
1323         Same as Add(), but prepends the items to the beginning of the
1324         list of items (windows, subsizers or spaces) owned by this sizer.
1325     */
1326     wxSizerItem* Prepend(wxSizer* sizer, int proportion = 0,
1327                          int flag = 0,
1328                          int border = 0,
1329                          wxObject* userData = NULL);
1330
1331     /**
1332         Same as Add(), but prepends the items to the beginning of the
1333         list of items (windows, subsizers or spaces) owned by this sizer.
1334     */
1335     wxSizerItem* Prepend(int width, int height,
1336                          int proportion = 0,
1337                          int flag = 0,
1338                          int border = 0,
1339                          wxObject* userData = NULL);
1340
1341     /**
1342         Prepends non-stretchable space to the sizer.
1343         More readable way of calling wxSizer::Prepend(size, size, 0).
1344     */
1345     wxSizerItem* PrependSpacer(int size);
1346
1347     /**
1348         Prepends stretchable space to the sizer.
1349         More readable way of calling wxSizer::Prepend(0, 0, prop).
1350     */
1351     wxSizerItem* PrependStretchSpacer(int prop = 1);
1352
1353     /**
1354         This method is abstract and has to be overwritten by any derived class.
1355         Here, the sizer will do the actual calculation of its children's
1356         positions and sizes.
1357     */
1358     virtual void RecalcSizes() = 0;
1359
1360     /**
1361         Removes a child window from the sizer, but does @b not destroy it
1362         (because windows are owned by their parent window, not the sizer).
1363
1364         @deprecated
1365         The overload of this method taking a wxWindow* parameter
1366         is deprecated as it does not destroy the window as would usually be
1367         expected from Remove(). You should use Detach() in new code instead.
1368         There is currently no wxSizer method that will both detach and destroy
1369         a wxWindow item.
1370
1371         @note This method does not cause any layout or resizing to take
1372               place, call Layout() to update the layout "on screen" after
1373               removing a child from the sizer.
1374
1375         @return @true if the child item was found and removed, @false otherwise.
1376     */
1377     bool Remove(wxWindow* window);
1378
1379     /**
1380         Removes a sizer child from the sizer and destroys it.
1381
1382         @note This method does not cause any layout or resizing to take
1383               place, call Layout() to update the layout "on screen" after
1384               removing a child from the sizer.
1385
1386         @param sizer The wxSizer to be removed.
1387
1388         @return @true if the child item was found and removed, @false otherwise.
1389     */
1390     virtual bool Remove(wxSizer* sizer);
1391
1392     /**
1393         Removes a child from the sizer and destroys it if it is a sizer or a
1394         spacer, but not if it is a window (because windows are owned by their
1395         parent window, not the sizer).
1396
1397         @note This method does not cause any layout or resizing to take
1398               place, call Layout() to update the layout "on screen" after
1399               removing a child from the sizer.
1400
1401         @param index
1402             The position of the child in the sizer, e.g. 0 for the first item.
1403
1404         @return @true if the child item was found and removed, @false otherwise.
1405     */
1406     bool Remove(size_t index);
1407
1408     /**
1409         Detaches the given @a oldwin from the sizer and replaces it with the
1410         given @a newwin. The detached child window is @b not deleted (because
1411         windows are owned by their parent window, not the sizer).
1412
1413         Use parameter @a recursive to search the given element recursively in subsizers.
1414
1415         This method does not cause any layout or resizing to take place,
1416         call Layout() to update the layout "on screen" after replacing a
1417         child from the sizer.
1418
1419         Returns @true if the child item was found and removed, @false otherwise.
1420     */
1421     virtual bool Replace(wxWindow* oldwin, wxWindow* newwin,
1422                          bool recursive = false);
1423
1424     /**
1425         Detaches the given @a oldsz from the sizer and replaces it with the
1426         given @a newsz. The detached child sizer is deleted.
1427
1428         Use parameter @a recursive to search the given element recursively in subsizers.
1429
1430         This method does not cause any layout or resizing to take place,
1431         call Layout() to update the layout "on screen" after replacing a
1432         child from the sizer.
1433
1434         Returns @true if the child item was found and removed, @false otherwise.
1435     */
1436     virtual bool Replace(wxSizer* oldsz, wxSizer* newsz,
1437                          bool recursive = false);
1438
1439     /**
1440         Detaches the given item at position @a index from the sizer and
1441         replaces it with the given wxSizerItem @a newitem.
1442
1443         The detached child is deleted @b only if it is a sizer or a spacer
1444         (but not if it is a wxWindow because windows are owned by their
1445         parent window, not the sizer).
1446
1447         This method does not cause any layout or resizing to take place,
1448         call Layout() to update the layout "on screen" after replacing a
1449         child from the sizer.
1450
1451         Returns @true if the child item was found and removed, @false otherwise.
1452     */
1453     virtual bool Replace(size_t index, wxSizerItem* newitem);
1454
1455     /**
1456         Call this to force the sizer to take the given dimension and thus force
1457         the items owned by the sizer to resize themselves according to the
1458         rules defined by the parameter in the Add() and Prepend() methods.
1459     */
1460     void SetDimension(int x, int y, int width, int height);
1461
1462     /**
1463         @overload
1464      */
1465     void SetDimension(const wxPoint& pos, const wxSize& size);
1466
1467     /**
1468         Set an item's minimum size by window, sizer, or position.
1469
1470         The item will be found recursively in the sizer's descendants.
1471         This function enables an application to set the size of an item after
1472         initial creation.
1473
1474         @see wxSizerItem::SetMinSize()
1475     */
1476     void SetItemMinSize(wxWindow* window, int width, int height);
1477
1478     /**
1479         Set an item's minimum size by window, sizer, or position.
1480
1481         The item will be found recursively in the sizer's descendants.
1482         This function enables an application to set the size of an item after
1483         initial creation.
1484
1485         @see wxSizerItem::SetMinSize()
1486     */
1487     void SetItemMinSize(wxSizer* sizer, int width, int height);
1488
1489     /**
1490         Set an item's minimum size by window, sizer, or position.
1491
1492         The item will be found recursively in the sizer's descendants.
1493         This function enables an application to set the size of an item after
1494         initial creation.
1495
1496         @see wxSizerItem::SetMinSize()
1497     */
1498     void SetItemMinSize(size_t index, int width, int height);
1499
1500     /**
1501         Call this to give the sizer a minimal size.
1502
1503         Normally, the sizer will calculate its minimal size based purely on how
1504         much space its children need. After calling this method GetMinSize()
1505         will return either the minimal size as requested by its children or the
1506         minimal size set here, depending on which is bigger.
1507     */
1508     void SetMinSize(const wxSize& size);
1509
1510     /**
1511         @overload
1512      */
1513     void SetMinSize(int width, int height);
1514
1515     /**
1516         This method first calls Fit() and then wxTopLevelWindow::SetSizeHints()
1517         on the @a window passed to it.
1518
1519         This only makes sense when @a window is actually a wxTopLevelWindow such
1520         as a wxFrame or a wxDialog, since SetSizeHints only has any effect in these classes.
1521         It does nothing in normal windows or controls.
1522
1523         This method is implicitly used by wxWindow::SetSizerAndFit() which is
1524         commonly invoked in the constructor of a toplevel window itself (see
1525         the sample in the description of wxBoxSizer) if the toplevel window is
1526         resizable.
1527     */
1528     void SetSizeHints(wxWindow* window);
1529
1530     /**
1531         Tell the sizer to set the minimal size of the @a window virtual area to match
1532         the sizer's minimal size. For windows with managed scrollbars this will set them
1533         appropriately.
1534
1535         @deprecated @todo provide deprecation description
1536
1537         @see wxScrolled::SetScrollbars()
1538     */
1539     void SetVirtualSizeHints(wxWindow* window);
1540
1541     /**
1542         Shows or hides the @a window.
1543         To make a sizer item disappear or reappear, use Show() followed by Layout().
1544
1545         Use parameter @a recursive to show or hide elements found in subsizers.
1546
1547         Returns @true if the child item was found, @false otherwise.
1548
1549         @see Hide(), IsShown()
1550     */
1551     bool Show(wxWindow* window, bool show = true,
1552               bool recursive = false);
1553
1554     /**
1555         Shows or hides @a sizer.
1556         To make a sizer item disappear or reappear, use Show() followed by Layout().
1557
1558         Use parameter @a recursive to show or hide elements found in subsizers.
1559
1560         Returns @true if the child item was found, @false otherwise.
1561
1562         @see Hide(), IsShown()
1563     */
1564     bool Show(wxSizer* sizer, bool show = true,
1565               bool recursive = false);
1566
1567     /**
1568         Shows the item at @a index.
1569         To make a sizer item disappear or reappear, use Show() followed by Layout().
1570
1571         Returns @true if the child item was found, @false otherwise.
1572
1573         @see Hide(), IsShown()
1574     */
1575     bool Show(size_t index, bool show = true);
1576 };
1577
1578
1579
1580 /**
1581     @class wxGridSizer
1582
1583     A grid sizer is a sizer which lays out its children in a two-dimensional
1584     table with all table fields having the same size, i.e. the width of each
1585     field is the width of the widest child, the height of each field is the
1586     height of the tallest child.
1587
1588     @library{wxcore}
1589     @category{winlayout}
1590
1591     @see wxSizer, @ref overview_sizer
1592 */
1593 class wxGridSizer : public wxSizer
1594 {
1595 public:
1596     //@{
1597     /**
1598         Constructor for a wxGridSizer.
1599
1600         @a rows and @a cols determine the number of columns and rows in the sizer -
1601         if either of the parameters is zero, it will be calculated to form the
1602         total number of children in the sizer, thus making the sizer grow dynamically.
1603
1604         @a vgap and @a hgap define extra space between all children.
1605     */
1606     wxGridSizer(int rows, int cols, int vgap, int hgap);
1607     wxGridSizer(int cols, int vgap = 0, int hgap = 0);
1608     //@}
1609
1610     /**
1611         Returns the number of columns in the sizer.
1612     */
1613     int GetCols() const;
1614
1615     /**
1616         Returns the horizontal gap (in pixels) between cells in the sizer.
1617     */
1618     int GetHGap() const;
1619
1620     /**
1621         Returns the number of rows in the sizer.
1622     */
1623     int GetRows() const;
1624
1625     /**
1626         Returns the vertical gap (in pixels) between the cells in the sizer.
1627     */
1628     int GetVGap() const;
1629
1630     /**
1631         Sets the number of columns in the sizer.
1632     */
1633     void SetCols(int cols);
1634
1635     /**
1636         Sets the horizontal gap (in pixels) between cells in the sizer.
1637     */
1638     void SetHGap(int gap);
1639
1640     /**
1641         Sets the number of rows in the sizer.
1642     */
1643     void SetRows(int rows);
1644
1645     /**
1646         Sets the vertical gap (in pixels) between the cells in the sizer.
1647     */
1648     void SetVGap(int gap);
1649 };
1650
1651
1652
1653 /**
1654     @class wxStaticBoxSizer
1655
1656     wxStaticBoxSizer is a sizer derived from wxBoxSizer but adds a static
1657     box around the sizer.
1658     This static box may be either created independently or the sizer may create
1659     it itself as a convenience. In any case, the sizer owns the wxStaticBox control
1660     and will delete it, if it is deleted.
1661
1662     @library{wxcore}
1663     @category{winlayout}
1664
1665     @see wxSizer, wxStaticBox, wxBoxSizer, @ref overview_sizer
1666 */
1667 class wxStaticBoxSizer : public wxBoxSizer
1668 {
1669 public:
1670     /**
1671         This constructor uses an already existing static box.
1672
1673         It takes the associated static box and the orientation @a orient, which
1674         can be either @c wxVERTICAL or @c wxHORIZONTAL as parameters.
1675     */
1676     wxStaticBoxSizer(wxStaticBox* box, int orient);
1677
1678     /**
1679         This constructor creates a new static box with the given label and parent window.
1680     */
1681     wxStaticBoxSizer(int orient, wxWindow parent,
1682                      const wxString& label = wxEmptyString);
1683
1684     /**
1685         Returns the static box associated with the sizer.
1686     */
1687     wxStaticBox* GetStaticBox() const;
1688 };
1689
1690
1691
1692 /**
1693     @class wxBoxSizer
1694
1695     The basic idea behind a box sizer is that windows will most often be laid out
1696     in rather simple basic geometry, typically in a row or a column or several
1697     hierarchies of either.
1698
1699     For more information, please see @ref overview_sizer_box.
1700
1701     @library{wxcore}
1702     @category{winlayout}
1703
1704     @see wxSizer, @ref overview_sizer
1705 */
1706 class wxBoxSizer : public wxSizer
1707 {
1708 public:
1709     /**
1710         Constructor for a wxBoxSizer. @a orient may be either of wxVERTICAL
1711         or wxHORIZONTAL for creating either a column sizer or a row sizer.
1712     */
1713     wxBoxSizer(int orient);
1714
1715     /**
1716         Implements the calculation of a box sizer's minimal.
1717
1718         It is used internally only and must not be called by the user.
1719         Documented for information.
1720     */
1721     virtual wxSize CalcMin();
1722
1723     /**
1724         Returns the orientation of the box sizer, either wxVERTICAL
1725         or wxHORIZONTAL.
1726     */
1727     int GetOrientation() const;
1728
1729     /**
1730         Implements the calculation of a box sizer's dimensions and then sets
1731         the size of its children (calling wxWindow::SetSize if the child is a window).
1732
1733         It is used internally only and must not be called by the user
1734         (call Layout() if you want to resize). Documented for information.
1735     */
1736     void RecalcSizes();
1737 };
1738