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