src/msw/button.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/button.cpp
   3 // Purpose:     wxButton
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_BUTTON
  28
  29 #include "wx/button.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/app.h"
  33     #include "wx/brush.h"
  34     #include "wx/panel.h"
  35     #include "wx/bmpbuttn.h"
  36     #include "wx/settings.h"
  37     #include "wx/dcscreen.h"
  38     #include "wx/dcclient.h"
  39     #include "wx/toplevel.h"
  40     #include "wx/msw/wrapcctl.h"
  41     #include "wx/msw/private.h"
  42     #include "wx/msw/missing.h"
  43 #endif
  44
  45 #include "wx/imaglist.h"
  46 #include "wx/stockitem.h"
  47 #include "wx/msw/private/button.h"
  48 #include "wx/msw/private/dc.h"
  49 #include "wx/private/window.h"
  50
  51 #if wxUSE_MARKUP
  52     #include "wx/generic/private/markuptext.h"
  53 #endif // wxUSE_MARKUP
  54
  55 using namespace wxMSWImpl;
  56
  57 #if wxUSE_UXTHEME
  58     #include "wx/msw/uxtheme.h"
  59
  60     // no need to include tmschema.h
  61     #ifndef BP_PUSHBUTTON
  62         #define BP_PUSHBUTTON 1
  63
  64         #define PBS_NORMAL    1
  65         #define PBS_HOT       2
  66         #define PBS_PRESSED   3
  67         #define PBS_DISABLED  4
  68         #define PBS_DEFAULTED 5
  69
  70         #define TMT_CONTENTMARGINS 3602
  71     #endif
  72
  73     // provide the necessary declarations ourselves if they're missing from
  74     // headers
  75     #ifndef BCM_SETIMAGELIST
  76         #define BCM_SETIMAGELIST    0x1602
  77         #define BCM_SETTEXTMARGIN   0x1604
  78
  79         enum
  80         {
  81             BUTTON_IMAGELIST_ALIGN_LEFT,
  82             BUTTON_IMAGELIST_ALIGN_RIGHT,
  83             BUTTON_IMAGELIST_ALIGN_TOP,
  84             BUTTON_IMAGELIST_ALIGN_BOTTOM
  85         };
  86
  87         struct BUTTON_IMAGELIST
  88         {
  89             HIMAGELIST himl;
  90             RECT margin;
  91             UINT uAlign;
  92         };
  93     #endif
  94 #endif // wxUSE_UXTHEME
  95
  96 #ifndef WM_THEMECHANGED
  97     #define WM_THEMECHANGED     0x031A
  98 #endif
  99
 100 #ifndef ODS_NOACCEL
 101     #define ODS_NOACCEL         0x0100
 102 #endif
 103
 104 #ifndef ODS_NOFOCUSRECT
 105     #define ODS_NOFOCUSRECT     0x0200
 106 #endif
 107
 108 #ifndef DT_HIDEPREFIX
 109     #define DT_HIDEPREFIX       0x00100000
 110 #endif
 111
 112 // set the value for BCM_SETSHIELD (for the UAC shield) if it's not defined in
 113 // the header
 114 #ifndef BCM_SETSHIELD
 115     #define BCM_SETSHIELD       0x160c
 116 #endif
 117
 118 #if wxUSE_UXTHEME
 119 extern wxWindowMSW *wxWindowBeingErased; // From src/msw/window.cpp
 120 #endif // wxUSE_UXTHEME
 121
 122 // ----------------------------------------------------------------------------
 123 // button image data
 124 // ----------------------------------------------------------------------------
 125
 126 // we use different data classes for owner drawn buttons and for themed XP ones
 127
 128 class wxButtonImageData
 129 {
 130 public:
 131     wxButtonImageData() { }
 132     virtual ~wxButtonImageData() { }
 133
 134     virtual wxBitmap GetBitmap(wxButton::State which) const = 0;
 135     virtual void SetBitmap(const wxBitmap& bitmap, wxButton::State which) = 0;
 136
 137     virtual wxSize GetBitmapMargins() const = 0;
 138     virtual void SetBitmapMargins(wxCoord x, wxCoord y) = 0;
 139
 140     virtual wxDirection GetBitmapPosition() const = 0;
 141     virtual void SetBitmapPosition(wxDirection dir) = 0;
 142
 143 private:
 144     wxDECLARE_NO_COPY_CLASS(wxButtonImageData);
 145 };
 146
 147 namespace
 148 {
 149
 150 // the gap between button edge and the interior area used by Windows for the
 151 // standard buttons
 152 const int OD_BUTTON_MARGIN = 4;
 153
 154 class wxODButtonImageData : public wxButtonImageData
 155 {
 156 public:
 157     wxODButtonImageData(wxButton *btn, const wxBitmap& bitmap)
 158     {
 159         SetBitmap(bitmap, wxButton::State_Normal);
 160         SetBitmap(bitmap.ConvertToDisabled(), wxButton::State_Disabled);
 161
 162         m_dir = wxLEFT;
 163
 164         // we use margins when we have both bitmap and text, but when we have
 165         // only the bitmap it should take up the entire button area
 166         if ( btn->ShowsLabel() )
 167         {
 168             m_margin.x = btn->GetCharWidth();
 169             m_margin.y = btn->GetCharHeight() / 2;
 170         }
 171     }
 172
 173     virtual wxBitmap GetBitmap(wxButton::State which) const
 174     {
 175         return m_bitmaps[which];
 176     }
 177
 178     virtual void SetBitmap(const wxBitmap& bitmap, wxButton::State which)
 179     {
 180         m_bitmaps[which] = bitmap;
 181     }
 182
 183     virtual wxSize GetBitmapMargins() const
 184     {
 185         return m_margin;
 186     }
 187
 188     virtual void SetBitmapMargins(wxCoord x, wxCoord y)
 189     {
 190         m_margin = wxSize(x, y);
 191     }
 192
 193     virtual wxDirection GetBitmapPosition() const
 194     {
 195         return m_dir;
 196     }
 197
 198     virtual void SetBitmapPosition(wxDirection dir)
 199     {
 200         m_dir = dir;
 201     }
 202
 203 private:
 204     // just store the values passed to us to be able to retrieve them later
 205     // from the drawing code
 206     wxBitmap m_bitmaps[wxButton::State_Max];
 207     wxSize m_margin;
 208     wxDirection m_dir;
 209
 210     wxDECLARE_NO_COPY_CLASS(wxODButtonImageData);
 211 };
 212
 213 #if wxUSE_UXTHEME
 214
 215 // somehow the margin is one pixel greater than the value returned by
 216 // GetThemeMargins() call
 217 const int XP_BUTTON_EXTRA_MARGIN = 1;
 218
 219 class wxXPButtonImageData : public wxButtonImageData
 220 {
 221 public:
 222     // we must be constructed with the size of our images as we need to create
 223     // the image list
 224     wxXPButtonImageData(wxButton *btn, const wxBitmap& bitmap)
 225         : m_iml(bitmap.GetWidth(), bitmap.GetHeight(), true /* use mask */,
 226                 wxButton::State_Max),
 227           m_hwndBtn(GetHwndOf(btn))
 228     {
 229         // initialize all bitmaps except for the disabled one to normal state
 230         for ( int n = 0; n < wxButton::State_Max; n++ )
 231         {
 232             m_iml.Add(n == wxButton::State_Disabled ? bitmap.ConvertToDisabled()
 233                                                     : bitmap);
 234         }
 235
 236         m_data.himl = GetHimagelistOf(&m_iml);
 237
 238         // no margins by default
 239         m_data.margin.left =
 240         m_data.margin.right =
 241         m_data.margin.top =
 242         m_data.margin.bottom = 0;
 243
 244         // use default alignment
 245         m_data.uAlign = BUTTON_IMAGELIST_ALIGN_LEFT;
 246
 247         UpdateImageInfo();
 248     }
 249
 250     virtual wxBitmap GetBitmap(wxButton::State which) const
 251     {
 252         return m_iml.GetBitmap(which);
 253     }
 254
 255     virtual void SetBitmap(const wxBitmap& bitmap, wxButton::State which)
 256     {
 257         m_iml.Replace(which, bitmap);
 258
 259         UpdateImageInfo();
 260     }
 261
 262     virtual wxSize GetBitmapMargins() const
 263     {
 264         return wxSize(m_data.margin.left, m_data.margin.top);
 265     }
 266
 267     virtual void SetBitmapMargins(wxCoord x, wxCoord y)
 268     {
 269         RECT& margin = m_data.margin;
 270         margin.left =
 271         margin.right = x;
 272         margin.top =
 273         margin.bottom = y;
 274
 275         if ( !::SendMessage(m_hwndBtn, BCM_SETTEXTMARGIN, 0, (LPARAM)&margin) )
 276         {
 277             wxLogDebug("SendMessage(BCM_SETTEXTMARGIN) failed");
 278         }
 279     }
 280
 281     virtual wxDirection GetBitmapPosition() const
 282     {
 283         switch ( m_data.uAlign )
 284         {
 285             default:
 286                 wxFAIL_MSG( "invalid image alignment" );
 287                 // fall through
 288
 289             case BUTTON_IMAGELIST_ALIGN_LEFT:
 290                 return wxLEFT;
 291
 292             case BUTTON_IMAGELIST_ALIGN_RIGHT:
 293                 return wxRIGHT;
 294
 295             case BUTTON_IMAGELIST_ALIGN_TOP:
 296                 return wxTOP;
 297
 298             case BUTTON_IMAGELIST_ALIGN_BOTTOM:
 299                 return wxBOTTOM;
 300         }
 301     }
 302
 303     virtual void SetBitmapPosition(wxDirection dir)
 304     {
 305         UINT alignNew;
 306         switch ( dir )
 307         {
 308             default:
 309                 wxFAIL_MSG( "invalid direction" );
 310                 // fall through
 311
 312             case wxLEFT:
 313                 alignNew = BUTTON_IMAGELIST_ALIGN_LEFT;
 314                 break;
 315
 316             case wxRIGHT:
 317                 alignNew = BUTTON_IMAGELIST_ALIGN_RIGHT;
 318                 break;
 319
 320             case wxTOP:
 321                 alignNew = BUTTON_IMAGELIST_ALIGN_TOP;
 322                 break;
 323
 324             case wxBOTTOM:
 325                 alignNew = BUTTON_IMAGELIST_ALIGN_BOTTOM;
 326                 break;
 327         }
 328
 329         if ( alignNew != m_data.uAlign )
 330         {
 331             m_data.uAlign = alignNew;
 332             UpdateImageInfo();
 333         }
 334     }
 335
 336 private:
 337     void UpdateImageInfo()
 338     {
 339         if ( !::SendMessage(m_hwndBtn, BCM_SETIMAGELIST, 0, (LPARAM)&m_data) )
 340         {
 341             wxLogDebug("SendMessage(BCM_SETIMAGELIST) failed");
 342         }
 343     }
 344
 345     // we store image list separately to be able to use convenient wxImageList
 346     // methods instead of working with raw HIMAGELIST
 347     wxImageList m_iml;
 348
 349     // store the rest of the data in BCM_SETIMAGELIST-friendly form
 350     BUTTON_IMAGELIST m_data;
 351
 352     // the button we're associated with
 353     const HWND m_hwndBtn;
 354
 355
 356     wxDECLARE_NO_COPY_CLASS(wxXPButtonImageData);
 357 };
 358
 359 #endif // wxUSE_UXTHEME
 360
 361 } // anonymous namespace
 362
 363 // ----------------------------------------------------------------------------
 364 // macros
 365 // ----------------------------------------------------------------------------
 366
 367 // ============================================================================
 368 // implementation
 369 // ============================================================================
 370
 371 // ----------------------------------------------------------------------------
 372 // helper functions from wx/msw/private/button.h
 373 // ----------------------------------------------------------------------------
 374
 375 void wxMSWButton::UpdateMultilineStyle(HWND hwnd, const wxString& label)
 376 {
 377     // update BS_MULTILINE style depending on the new label (resetting it
 378     // doesn't seem to do anything very useful but it shouldn't hurt and we do
 379     // have to set it whenever the label becomes multi line as otherwise it
 380     // wouldn't be shown correctly as we don't use BS_MULTILINE when creating
 381     // the control unless it already has new lines in its label)
 382     long styleOld = ::GetWindowLong(hwnd, GWL_STYLE),
 383          styleNew;
 384     if ( label.find(wxT('\n')) != wxString::npos )
 385         styleNew = styleOld | BS_MULTILINE;
 386     else
 387         styleNew = styleOld & ~BS_MULTILINE;
 388
 389     if ( styleNew != styleOld )
 390         ::SetWindowLong(hwnd, GWL_STYLE, styleNew);
 391 }
 392
 393 wxSize wxMSWButton::GetFittingSize(wxWindow *win,
 394                                    const wxSize& sizeLabel,
 395                                    int flags)
 396 {
 397     // FIXME: this is pure guesswork, need to retrieve the real button margins
 398     wxSize sizeBtn = sizeLabel;
 399
 400     sizeBtn.x += 3*win->GetCharWidth();
 401     sizeBtn.y += win->GetCharHeight()/2;
 402
 403     // account for the shield UAC icon if we have it
 404     if ( flags & Size_AuthNeeded )
 405         sizeBtn.x += wxSystemSettings::GetMetric(wxSYS_SMALLICON_X);
 406
 407     return sizeBtn;
 408 }
 409
 410 wxSize wxMSWButton::ComputeBestFittingSize(wxControl *btn, int flags)
 411 {
 412     wxClientDC dc(btn);
 413
 414     wxSize sizeBtn;
 415     dc.GetMultiLineTextExtent(btn->GetLabelText(), &sizeBtn.x, &sizeBtn.y);
 416
 417     return GetFittingSize(btn, sizeBtn, flags);
 418 }
 419
 420 wxSize wxMSWButton::IncreaseToStdSizeAndCache(wxControl *btn, const wxSize& size)
 421 {
 422     wxSize sizeBtn(size);
 423
 424     // All buttons have at least the standard height and, unless the user
 425     // explicitly wants them to be as small as possible and used wxBU_EXACTFIT
 426     // style to indicate this, of at least the standard width too.
 427     //
 428     // Notice that we really want to make all buttons equally high, otherwise
 429     // they look ugly and the existing code using wxBU_EXACTFIT only uses it to
 430     // control width and not height.
 431
 432     // The 50x14 button size is documented in the "Recommended sizing and
 433     // spacing" section of MSDN layout article.
 434     //
 435     // Note that we intentionally don't use GetDefaultSize() here, because
 436     // it's inexact -- dialog units depend on this dialog's font.
 437     const wxSize sizeDef = btn->ConvertDialogToPixels(wxSize(50, 14));
 438     if ( !btn->HasFlag(wxBU_EXACTFIT) )
 439     {
 440         if ( sizeBtn.x < sizeDef.x )
 441             sizeBtn.x = sizeDef.x;
 442     }
 443     if ( sizeBtn.y < sizeDef.y )
 444         sizeBtn.y = sizeDef.y;
 445
 446     btn->CacheBestSize(sizeBtn);
 447
 448     return sizeBtn;
 449 }
 450
 451 // ----------------------------------------------------------------------------
 452 // creation/destruction
 453 // ----------------------------------------------------------------------------
 454
 455 bool wxButton::Create(wxWindow *parent,
 456                       wxWindowID id,
 457                       const wxString& lbl,
 458                       const wxPoint& pos,
 459                       const wxSize& size,
 460                       long style,
 461                       const wxValidator& validator,
 462                       const wxString& name)
 463 {
 464     wxString label(lbl);
 465     if (label.empty() && wxIsStockID(id))
 466     {
 467         // On Windows, some buttons aren't supposed to have mnemonics
 468         label = wxGetStockLabel
 469                 (
 470                     id,
 471                     id == wxID_OK || id == wxID_CANCEL || id == wxID_CLOSE
 472                         ? wxSTOCK_NOFLAGS
 473                         : wxSTOCK_WITH_MNEMONIC
 474                 );
 475     }
 476
 477     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 478         return false;
 479
 480     WXDWORD exstyle;
 481     WXDWORD msStyle = MSWGetStyle(style, &exstyle);
 482
 483     // if the label contains several lines we must explicitly tell the button
 484     // about it or it wouldn't draw it correctly ("\n"s would just appear as
 485     // black boxes)
 486     //
 487     // NB: we do it here and not in MSWGetStyle() because we need the label
 488     //     value and the label is not set yet when MSWGetStyle() is called
 489     msStyle |= wxMSWButton::GetMultilineStyle(label);
 490
 491     return MSWCreateControl(wxT("BUTTON"), msStyle, pos, size, label, exstyle);
 492 }
 493
 494 wxButton::~wxButton()
 495 {
 496     wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
 497     if ( tlw && tlw->GetTmpDefaultItem() == this )
 498     {
 499         UnsetTmpDefault();
 500     }
 501
 502     delete m_imageData;
 503 #if wxUSE_MARKUP
 504     delete m_markupText;
 505 #endif // wxUSE_MARKUP
 506 }
 507
 508 // ----------------------------------------------------------------------------
 509 // flags
 510 // ----------------------------------------------------------------------------
 511
 512 WXDWORD wxButton::MSWGetStyle(long style, WXDWORD *exstyle) const
 513 {
 514     // buttons never have an external border, they draw their own one
 515     WXDWORD msStyle = wxControl::MSWGetStyle
 516                       (
 517                         (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle
 518                       );
 519
 520     // we must use WS_CLIPSIBLINGS with the buttons or they would draw over
 521     // each other in any resizeable dialog which has more than one button in
 522     // the bottom
 523     msStyle |= WS_CLIPSIBLINGS;
 524
 525     // don't use "else if" here: weird as it is, but you may combine wxBU_LEFT
 526     // and wxBU_RIGHT to get BS_CENTER!
 527     if ( style & wxBU_LEFT )
 528         msStyle |= BS_LEFT;
 529     if ( style & wxBU_RIGHT )
 530         msStyle |= BS_RIGHT;
 531     if ( style & wxBU_TOP )
 532         msStyle |= BS_TOP;
 533     if ( style & wxBU_BOTTOM )
 534         msStyle |= BS_BOTTOM;
 535 #ifndef __WXWINCE__
 536     // flat 2d buttons
 537     if ( style & wxNO_BORDER )
 538         msStyle |= BS_FLAT;
 539 #endif // __WXWINCE__
 540
 541     return msStyle;
 542 }
 543
 544 void wxButton::SetLabel(const wxString& label)
 545 {
 546     wxMSWButton::UpdateMultilineStyle(GetHwnd(), label);
 547
 548     wxButtonBase::SetLabel(label);
 549
 550 #if wxUSE_MARKUP
 551     // If we have a plain text label, we shouldn't be using markup any longer.
 552     if ( m_markupText )
 553     {
 554         delete m_markupText;
 555         m_markupText = NULL;
 556
 557         // Unfortunately we don't really know whether we can reset the button
 558         // to be non-owner-drawn or not: if we had made it owner-drawn just
 559         // because of a call to SetLabelMarkup(), we could, but not if there
 560         // were [also] calls to Set{Fore,Back}groundColour(). If it's really a
 561         // problem to have button remain owner-drawn forever just because it
 562         // had markup label once, we should record the reason for our current
 563         // owner-drawnness and check it here.
 564     }
 565 #endif // wxUSE_MARKUP
 566 }
 567
 568 // ----------------------------------------------------------------------------
 569 // size management including autosizing
 570 // ----------------------------------------------------------------------------
 571
 572 void wxButton::AdjustForBitmapSize(wxSize &size) const
 573 {
 574     wxCHECK_RET( m_imageData, wxT("shouldn't be called if no image") );
 575
 576     // account for the bitmap size
 577     const wxSize sizeBmp = m_imageData->GetBitmap(State_Normal).GetSize();
 578     const wxDirection dirBmp = m_imageData->GetBitmapPosition();
 579     if ( dirBmp == wxLEFT || dirBmp == wxRIGHT )
 580     {
 581         size.x += sizeBmp.x;
 582         if ( sizeBmp.y > size.y )
 583             size.y = sizeBmp.y;
 584     }
 585     else // bitmap on top/below the text
 586     {
 587         size.y += sizeBmp.y;
 588         if ( sizeBmp.x > size.x )
 589             size.x = sizeBmp.x;
 590     }
 591
 592     // account for the user-specified margins
 593     size += 2*m_imageData->GetBitmapMargins();
 594
 595     // and also for the margins we always add internally (unless we have no
 596     // border at all in which case the button has exactly the same size as
 597     // bitmap and so no margins should be used)
 598     if ( !HasFlag(wxBORDER_NONE) )
 599     {
 600         int marginH = 0,
 601             marginV = 0;
 602 #if wxUSE_UXTHEME
 603         if ( wxUxThemeEngine::GetIfActive() )
 604         {
 605             wxUxThemeHandle theme(const_cast<wxButton *>(this), L"BUTTON");
 606
 607             MARGINS margins;
 608             wxUxThemeEngine::Get()->GetThemeMargins(theme, NULL,
 609                                                     BP_PUSHBUTTON,
 610                                                     PBS_NORMAL,
 611                                                     TMT_CONTENTMARGINS,
 612                                                     NULL,
 613                                                     &margins);
 614
 615             // XP doesn't draw themed buttons correctly when the client
 616             // area is smaller than 8x8 - enforce this minimum size for
 617             // small bitmaps
 618             size.IncTo(wxSize(8, 8));
 619
 620             marginH = margins.cxLeftWidth + margins.cxRightWidth
 621                         + 2*XP_BUTTON_EXTRA_MARGIN;
 622             marginV = margins.cyTopHeight + margins.cyBottomHeight
 623                         + 2*XP_BUTTON_EXTRA_MARGIN;
 624         }
 625         else
 626 #endif // wxUSE_UXTHEME
 627         {
 628             marginH =
 629             marginV = OD_BUTTON_MARGIN;
 630         }
 631
 632         size.IncBy(marginH, marginV);
 633     }
 634 }
 635
 636 wxSize wxButton::DoGetBestSize() const
 637 {
 638     wxButton * const self = const_cast<wxButton *>(this);
 639
 640     wxSize size;
 641
 642     // Account for the text part if we have it.
 643     if ( ShowsLabel() )
 644     {
 645         int flags = 0;
 646         if ( GetAuthNeeded() )
 647             flags |= wxMSWButton::Size_AuthNeeded;
 648
 649 #if wxUSE_MARKUP
 650         if ( m_markupText )
 651         {
 652             wxClientDC dc(self);
 653             size = wxMSWButton::GetFittingSize(self,
 654                                                m_markupText->Measure(dc),
 655                                                flags);
 656         }
 657         else // Normal plain text (but possibly multiline) label.
 658 #endif // wxUSE_MARKUP
 659         {
 660             size = wxMSWButton::ComputeBestFittingSize(self, flags);
 661         }
 662     }
 663
 664     if ( m_imageData )
 665         AdjustForBitmapSize(size);
 666
 667     return wxMSWButton::IncreaseToStdSizeAndCache(self, size);
 668 }
 669
 670 /* static */
 671 wxSize wxButtonBase::GetDefaultSize()
 672 {
 673     static wxSize s_sizeBtn;
 674
 675     if ( s_sizeBtn.x == 0 )
 676     {
 677         wxScreenDC dc;
 678         dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 679
 680         // The size of a standard button in the dialog units is 50x14,
 681         // translate this to pixels.
 682         //
 683         // Windows' computes dialog units using average character width over
 684         // upper- and lower-case ASCII alphabet and not using the average
 685         // character width metadata stored in the font; see
 686         // http://support.microsoft.com/default.aspx/kb/145994 for detailed
 687         // discussion.
 688         //
 689         // NB: wxMulDivInt32() is used, because it correctly rounds the result
 690
 691         const wxSize base = wxPrivate::GetAverageASCIILetterSize(dc);
 692         s_sizeBtn.x = wxMulDivInt32(50, base.x, 4);
 693         s_sizeBtn.y = wxMulDivInt32(14, base.y, 8);
 694     }
 695
 696     return s_sizeBtn;
 697 }
 698
 699 // ----------------------------------------------------------------------------
 700 // default button handling
 701 // ----------------------------------------------------------------------------
 702
 703 /*
 704    The comment below and all this code is probably due to not using WM_NEXTDLGCTL
 705    message when changing focus (but just SetFocus() which is not enough), see
 706    http://blogs.msdn.com/oldnewthing/archive/2004/08/02/205624.aspx for the
 707    full explanation.
 708
 709    TODO: Do use WM_NEXTDLGCTL and get rid of all this code.
 710
 711
 712    "Everything you ever wanted to know about the default buttons" or "Why do we
 713    have to do all this?"
 714
 715    In MSW the default button should be activated when the user presses Enter
 716    and the current control doesn't process Enter itself somehow. This is
 717    handled by ::DefWindowProc() (or maybe ::DefDialogProc()) using DM_SETDEFID
 718    Another aspect of "defaultness" is that the default button has different
 719    appearance: this is due to BS_DEFPUSHBUTTON style which is completely
 720    separate from DM_SETDEFID stuff (!). Also note that BS_DEFPUSHBUTTON should
 721    be unset if our parent window is not active so it should be unset whenever
 722    we lose activation and set back when we regain it.
 723
 724    Final complication is that when a button is active, it should be the default
 725    one, i.e. pressing Enter on a button always activates it and not another
 726    one.
 727
 728    We handle this by maintaining a permanent and a temporary default items in
 729    wxControlContainer (both may be NULL). When a button becomes the current
 730    control (i.e. gets focus) it sets itself as the temporary default which
 731    ensures that it has the right appearance and that Enter will be redirected
 732    to it. When the button loses focus, it unsets the temporary default and so
 733    the default item will be the permanent default -- that is the default button
 734    if any had been set or none otherwise, which is just what we want.
 735
 736    NB: all this is quite complicated by now and the worst is that normally
 737        it shouldn't be necessary at all as for the normal Windows programs
 738        DefWindowProc() and IsDialogMessage() take care of all this
 739        automatically -- however in wxWidgets programs this doesn't work for
 740        nested hierarchies (i.e. a notebook inside a notebook) for unknown
 741        reason and so we have to reproduce all this code ourselves. It would be
 742        very nice if we could avoid doing it.
 743  */
 744
 745 // set this button as the (permanently) default one in its panel
 746 wxWindow *wxButton::SetDefault()
 747 {
 748     // set this one as the default button both for wxWidgets ...
 749     wxWindow *winOldDefault = wxButtonBase::SetDefault();
 750
 751     // ... and Windows
 752     SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), false);
 753     SetDefaultStyle(this, true);
 754
 755     return winOldDefault;
 756 }
 757
 758 // return the top level parent window if it's not being deleted yet, otherwise
 759 // return NULL
 760 static wxTopLevelWindow *GetTLWParentIfNotBeingDeleted(wxWindow *win)
 761 {
 762     for ( ;; )
 763     {
 764         // IsTopLevel() will return false for a wxTLW being deleted, so we also
 765         // need the parent test for this case
 766         wxWindow * const parent = win->GetParent();
 767         if ( !parent || win->IsTopLevel() )
 768         {
 769             if ( win->IsBeingDeleted() )
 770                 return NULL;
 771
 772             break;
 773         }
 774
 775         win = parent;
 776     }
 777
 778     wxASSERT_MSG( win, wxT("button without top level parent?") );
 779
 780     wxTopLevelWindow * const tlw = wxDynamicCast(win, wxTopLevelWindow);
 781     wxASSERT_MSG( tlw, wxT("logic error in GetTLWParentIfNotBeingDeleted()") );
 782
 783     return tlw;
 784 }
 785
 786 // set this button as being currently default
 787 void wxButton::SetTmpDefault()
 788 {
 789     wxTopLevelWindow * const tlw = GetTLWParentIfNotBeingDeleted(GetParent());
 790     if ( !tlw )
 791         return;
 792
 793     wxWindow *winOldDefault = tlw->GetDefaultItem();
 794     tlw->SetTmpDefaultItem(this);
 795
 796     SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), false);
 797     SetDefaultStyle(this, true);
 798 }
 799
 800 // unset this button as currently default, it may still stay permanent default
 801 void wxButton::UnsetTmpDefault()
 802 {
 803     wxTopLevelWindow * const tlw = GetTLWParentIfNotBeingDeleted(GetParent());
 804     if ( !tlw )
 805         return;
 806
 807     tlw->SetTmpDefaultItem(NULL);
 808
 809     wxWindow *winOldDefault = tlw->GetDefaultItem();
 810
 811     SetDefaultStyle(this, false);
 812     SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), true);
 813 }
 814
 815 /* static */
 816 void
 817 wxButton::SetDefaultStyle(wxButton *btn, bool on)
 818 {
 819     // we may be called with NULL pointer -- simpler to do the check here than
 820     // in the caller which does wxDynamicCast()
 821     if ( !btn )
 822         return;
 823
 824     // first, let DefDlgProc() know about the new default button
 825     if ( on )
 826     {
 827         // we shouldn't set BS_DEFPUSHBUTTON for any button if we don't have
 828         // focus at all any more
 829         if ( !wxTheApp->IsActive() )
 830             return;
 831
 832         wxWindow * const tlw = wxGetTopLevelParent(btn);
 833         wxCHECK_RET( tlw, wxT("button without top level window?") );
 834
 835         ::SendMessage(GetHwndOf(tlw), DM_SETDEFID, btn->GetId(), 0L);
 836
 837         // sending DM_SETDEFID also changes the button style to
 838         // BS_DEFPUSHBUTTON so there is nothing more to do
 839     }
 840
 841     // then also change the style as needed
 842     long style = ::GetWindowLong(GetHwndOf(btn), GWL_STYLE);
 843     if ( !(style & BS_DEFPUSHBUTTON) == on )
 844     {
 845         // don't do it with the owner drawn buttons because it will
 846         // reset BS_OWNERDRAW style bit too (as BS_OWNERDRAW &
 847         // BS_DEFPUSHBUTTON != 0)!
 848         if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
 849         {
 850             ::SendMessage(GetHwndOf(btn), BM_SETSTYLE,
 851                           on ? style | BS_DEFPUSHBUTTON
 852                              : style & ~BS_DEFPUSHBUTTON,
 853                           1L /* redraw */);
 854         }
 855         else // owner drawn
 856         {
 857             // redraw the button - it will notice itself that it's
 858             // [not] the default one [any longer]
 859             btn->Refresh();
 860         }
 861     }
 862     //else: already has correct style
 863 }
 864
 865 // ----------------------------------------------------------------------------
 866 // helpers
 867 // ----------------------------------------------------------------------------
 868
 869 bool wxButton::SendClickEvent()
 870 {
 871     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, GetId());
 872     event.SetEventObject(this);
 873
 874     return ProcessCommand(event);
 875 }
 876
 877 void wxButton::Command(wxCommandEvent & event)
 878 {
 879     ProcessCommand(event);
 880 }
 881
 882 // ----------------------------------------------------------------------------
 883 // event/message handlers
 884 // ----------------------------------------------------------------------------
 885
 886 bool wxButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 887 {
 888     bool processed = false;
 889     switch ( param )
 890     {
 891         // NOTE: Apparently older versions (NT 4?) of the common controls send
 892         //       BN_DOUBLECLICKED but not a second BN_CLICKED for owner-drawn
 893         //       buttons, so in order to send two EVT_BUTTON events we should
 894         //       catch both types.  Currently (Feb 2003) up-to-date versions of
 895         //       win98, win2k and winXP all send two BN_CLICKED messages for
 896         //       all button types, so we don't catch BN_DOUBLECLICKED anymore
 897         //       in order to not get 3 EVT_BUTTON events.  If this is a problem
 898         //       then we need to figure out which version of the comctl32 changed
 899         //       this behaviour and test for it.
 900
 901         case 1:                     // message came from an accelerator
 902         case BN_CLICKED:            // normal buttons send this
 903             processed = SendClickEvent();
 904             break;
 905     }
 906
 907     return processed;
 908 }
 909
 910 WXLRESULT wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 911 {
 912     // when we receive focus, we want to temporarily become the default button in
 913     // our parent panel so that pressing "Enter" would activate us -- and when
 914     // losing it we should restore the previous default button as well
 915     if ( nMsg == WM_SETFOCUS )
 916     {
 917         SetTmpDefault();
 918
 919         // let the default processing take place too
 920     }
 921     else if ( nMsg == WM_KILLFOCUS )
 922     {
 923         UnsetTmpDefault();
 924     }
 925     else if ( nMsg == WM_LBUTTONDBLCLK )
 926     {
 927         // emulate a click event to force an owner-drawn button to change its
 928         // appearance - without this, it won't do it
 929         (void)wxControl::MSWWindowProc(WM_LBUTTONDOWN, wParam, lParam);
 930
 931         // and continue with processing the message normally as well
 932     }
 933 #if wxUSE_UXTHEME
 934     else if ( nMsg == WM_THEMECHANGED )
 935     {
 936         // need to recalculate the best size here
 937         // as the theme size might have changed
 938         InvalidateBestSize();
 939     }
 940 #endif // wxUSE_UXTHEME
 941     // must use m_mouseInWindow here instead of IsMouseInWindow()
 942     // since we need to know the first time the mouse enters the window
 943     // and IsMouseInWindow() would return true in this case
 944     else if ( (nMsg == WM_MOUSEMOVE && !m_mouseInWindow) ||
 945                 nMsg == WM_MOUSELEAVE )
 946     {
 947         if (
 948                 IsEnabled() &&
 949                 (
 950 #if wxUSE_UXTHEME
 951                 wxUxThemeEngine::GetIfActive() ||
 952 #endif // wxUSE_UXTHEME
 953                  (m_imageData && m_imageData->GetBitmap(State_Current).IsOk())
 954                 )
 955            )
 956         {
 957             Refresh();
 958         }
 959     }
 960
 961     // let the base class do all real processing
 962     return wxControl::MSWWindowProc(nMsg, wParam, lParam);
 963 }
 964
 965 // ----------------------------------------------------------------------------
 966 // authentication needed handling
 967 // ----------------------------------------------------------------------------
 968
 969 bool wxButton::DoGetAuthNeeded() const
 970 {
 971     return m_authNeeded;
 972 }
 973
 974 void wxButton::DoSetAuthNeeded(bool show)
 975 {
 976     // show/hide UAC symbol on Windows Vista and later
 977     if ( wxGetWinVersion() >= wxWinVersion_6 )
 978     {
 979         m_authNeeded = show;
 980         ::SendMessage(GetHwnd(), BCM_SETSHIELD, 0, show);
 981         InvalidateBestSize();
 982     }
 983 }
 984
 985 // ----------------------------------------------------------------------------
 986 // button images
 987 // ----------------------------------------------------------------------------
 988
 989 wxBitmap wxButton::DoGetBitmap(State which) const
 990 {
 991     return m_imageData ? m_imageData->GetBitmap(which) : wxBitmap();
 992 }
 993
 994 void wxButton::DoSetBitmap(const wxBitmap& bitmap, State which)
 995 {
 996 #if wxUSE_UXTHEME
 997     wxXPButtonImageData *oldData = NULL;
 998 #endif // wxUSE_UXTHEME
 999
1000     // Check if we already had bitmaps of different size.
1001     if ( m_imageData &&
1002           bitmap.GetSize() != m_imageData->GetBitmap(State_Normal).GetSize() )
1003     {
1004         wxASSERT_MSG( which == State_Normal,
1005                       "Must set normal bitmap with the new size first" );
1006
1007 #if wxUSE_UXTHEME
1008         if ( ShowsLabel() && wxUxThemeEngine::GetIfActive() )
1009         {
1010             // We can't change the size of the images stored in wxImageList
1011             // in wxXPButtonImageData::m_iml so force recreating it below but
1012             // keep the current data to copy its values into the new one.
1013             oldData = static_cast<wxXPButtonImageData *>(m_imageData);
1014             m_imageData = NULL;
1015         }
1016 #endif // wxUSE_UXTHEME
1017         //else: wxODButtonImageData doesn't require anything special
1018     }
1019
1020     // allocate the image data when the first bitmap is set
1021     if ( !m_imageData )
1022     {
1023 #if wxUSE_UXTHEME
1024         // using image list doesn't work correctly if we don't have any label
1025         // (even if we use BUTTON_IMAGELIST_ALIGN_CENTER alignment and
1026         // BS_BITMAP style), at least under Windows 2003 so use owner drawn
1027         // strategy for bitmap-only buttons
1028         if ( ShowsLabel() && wxUxThemeEngine::GetIfActive() )
1029         {
1030             m_imageData = new wxXPButtonImageData(this, bitmap);
1031
1032             if ( oldData )
1033             {
1034                 // Preserve the old values in case the user changed them.
1035                 m_imageData->SetBitmapPosition(oldData->GetBitmapPosition());
1036
1037                 const wxSize oldMargins = oldData->GetBitmapMargins();
1038                 m_imageData->SetBitmapMargins(oldMargins.x, oldMargins.y);
1039
1040                 // No need to preserve the bitmaps though as they were of wrong
1041                 // size anyhow.
1042
1043                 delete oldData;
1044             }
1045         }
1046         else
1047 #endif // wxUSE_UXTHEME
1048         {
1049             m_imageData = new wxODButtonImageData(this, bitmap);
1050             MakeOwnerDrawn();
1051         }
1052     }
1053     else
1054     {
1055         m_imageData->SetBitmap(bitmap, which);
1056     }
1057
1058     // it should be enough to only invalidate the best size when the normal
1059     // bitmap changes as all bitmaps assigned to the button should be of the
1060     // same size anyhow
1061     if ( which == State_Normal )
1062         InvalidateBestSize();
1063
1064     Refresh();
1065 }
1066
1067 wxSize wxButton::DoGetBitmapMargins() const
1068 {
1069     return m_imageData ? m_imageData->GetBitmapMargins() : wxSize(0, 0);
1070 }
1071
1072 void wxButton::DoSetBitmapMargins(wxCoord x, wxCoord y)
1073 {
1074     wxCHECK_RET( m_imageData, "SetBitmap() must be called first" );
1075
1076     m_imageData->SetBitmapMargins(x, y);
1077     InvalidateBestSize();
1078 }
1079
1080 void wxButton::DoSetBitmapPosition(wxDirection dir)
1081 {
1082     wxCHECK_RET( m_imageData, "SetBitmap() must be called first" );
1083
1084     m_imageData->SetBitmapPosition(dir);
1085     InvalidateBestSize();
1086 }
1087
1088 // ----------------------------------------------------------------------------
1089 // markup support
1090 // ----------------------------------------------------------------------------
1091
1092 #if wxUSE_MARKUP
1093
1094 bool wxButton::DoSetLabelMarkup(const wxString& markup)
1095 {
1096     if ( !wxButtonBase::DoSetLabelMarkup(markup) )
1097         return false;
1098
1099     if ( !m_markupText )
1100     {
1101         m_markupText = new wxMarkupText(markup);
1102         MakeOwnerDrawn();
1103     }
1104     else
1105     {
1106         // We are already owner-drawn so just update the text.
1107         m_markupText->SetMarkup(markup);
1108     }
1109
1110     Refresh();
1111
1112     return true;
1113 }
1114
1115 #endif // wxUSE_MARKUP
1116
1117 // ----------------------------------------------------------------------------
1118 // owner-drawn buttons support
1119 // ----------------------------------------------------------------------------
1120
1121 // drawing helpers
1122 namespace
1123 {
1124
1125 // return the button state using both the ODS_XXX flags specified in state
1126 // parameter and the current button state
1127 wxButton::State GetButtonState(wxButton *btn, UINT state)
1128 {
1129     if ( state & ODS_DISABLED )
1130         return wxButton::State_Disabled;
1131
1132     if ( state & ODS_SELECTED )
1133         return wxButton::State_Pressed;
1134
1135     if ( btn->HasCapture() || btn->IsMouseInWindow() )
1136         return wxButton::State_Current;
1137
1138     if ( state & ODS_FOCUS )
1139         return wxButton::State_Focused;
1140
1141     return wxButton::State_Normal;
1142 }
1143
1144 void DrawButtonText(HDC hdc,
1145                     RECT *pRect,
1146                     wxButton *btn,
1147                     int flags)
1148 {
1149     const wxString text = btn->GetLabel();
1150
1151     if ( text.find(wxT('\n')) != wxString::npos )
1152     {
1153         // draw multiline label
1154
1155         // center text horizontally in any case
1156         flags |= DT_CENTER;
1157
1158         // first we need to compute its bounding rect
1159         RECT rc;
1160         ::CopyRect(&rc, pRect);
1161         ::DrawText(hdc, text.wx_str(), text.length(), &rc,
1162                    DT_CENTER | DT_CALCRECT);
1163
1164         // now center this rect inside the entire button area
1165         const LONG w = rc.right - rc.left;
1166         const LONG h = rc.bottom - rc.top;
1167         rc.left = (pRect->right - pRect->left)/2 - w/2;
1168         rc.right = rc.left+w;
1169         rc.top = (pRect->bottom - pRect->top)/2 - h/2;
1170         rc.bottom = rc.top+h;
1171
1172         ::DrawText(hdc, text.wx_str(), text.length(), &rc, flags);
1173     }
1174     else // single line label
1175     {
1176         // translate wx button flags to alignment flags for DrawText()
1177         if ( btn->HasFlag(wxBU_RIGHT) )
1178         {
1179             flags |= DT_RIGHT;
1180         }
1181         else if ( !btn->HasFlag(wxBU_LEFT) )
1182         {
1183             flags |= DT_CENTER;
1184         }
1185         //else: DT_LEFT is the default anyhow (and its value is 0 too)
1186
1187         if ( btn->HasFlag(wxBU_BOTTOM) )
1188         {
1189             flags |= DT_BOTTOM;
1190         }
1191         else if ( !btn->HasFlag(wxBU_TOP) )
1192         {
1193             flags |= DT_VCENTER;
1194         }
1195         //else: as above, DT_TOP is the default
1196
1197         // notice that we must have DT_SINGLELINE for vertical alignment flags
1198         // to work
1199         ::DrawText(hdc, text.wx_str(), text.length(), pRect,
1200                    flags | DT_SINGLELINE );
1201     }
1202 }
1203
1204 void DrawRect(HDC hdc, const RECT& r)
1205 {
1206     wxDrawLine(hdc, r.left, r.top, r.right, r.top);
1207     wxDrawLine(hdc, r.right, r.top, r.right, r.bottom);
1208     wxDrawLine(hdc, r.right, r.bottom, r.left, r.bottom);
1209     wxDrawLine(hdc, r.left, r.bottom, r.left, r.top);
1210 }
1211
1212 /*
1213    The button frame looks like this normally:
1214
1215    WWWWWWWWWWWWWWWWWWB
1216    WHHHHHHHHHHHHHHHHGB  W = white       (HILIGHT)
1217    WH               GB  H = light grey  (LIGHT)
1218    WH               GB  G = dark grey   (SHADOW)
1219    WH               GB  B = black       (DKSHADOW)
1220    WH               GB
1221    WGGGGGGGGGGGGGGGGGB
1222    BBBBBBBBBBBBBBBBBBB
1223
1224    When the button is selected, the button becomes like this (the total button
1225    size doesn't change):
1226
1227    BBBBBBBBBBBBBBBBBBB
1228    BWWWWWWWWWWWWWWWWBB
1229    BWHHHHHHHHHHHHHHGBB
1230    BWH             GBB
1231    BWH             GBB
1232    BWGGGGGGGGGGGGGGGBB
1233    BBBBBBBBBBBBBBBBBBB
1234    BBBBBBBBBBBBBBBBBBB
1235
1236    When the button is pushed (while selected) it is like:
1237
1238    BBBBBBBBBBBBBBBBBBB
1239    BGGGGGGGGGGGGGGGGGB
1240    BG               GB
1241    BG               GB
1242    BG               GB
1243    BG               GB
1244    BGGGGGGGGGGGGGGGGGB
1245    BBBBBBBBBBBBBBBBBBB
1246 */
1247 void DrawButtonFrame(HDC hdc, RECT& rectBtn,
1248                      bool selected, bool pushed)
1249 {
1250     RECT r;
1251     CopyRect(&r, &rectBtn);
1252
1253     AutoHPEN hpenBlack(GetSysColor(COLOR_3DDKSHADOW)),
1254              hpenGrey(GetSysColor(COLOR_3DSHADOW)),
1255              hpenLightGr(GetSysColor(COLOR_3DLIGHT)),
1256              hpenWhite(GetSysColor(COLOR_3DHILIGHT));
1257
1258     SelectInHDC selectPen(hdc, hpenBlack);
1259
1260     r.right--;
1261     r.bottom--;
1262
1263     if ( pushed )
1264     {
1265         DrawRect(hdc, r);
1266
1267         (void)SelectObject(hdc, hpenGrey);
1268         ::InflateRect(&r, -1, -1);
1269
1270         DrawRect(hdc, r);
1271     }
1272     else // !pushed
1273     {
1274         if ( selected )
1275         {
1276             DrawRect(hdc, r);
1277
1278             ::InflateRect(&r, -1, -1);
1279         }
1280
1281         wxDrawLine(hdc, r.left, r.bottom, r.right, r.bottom);
1282         wxDrawLine(hdc, r.right, r.bottom, r.right, r.top - 1);
1283
1284         (void)SelectObject(hdc, hpenWhite);
1285         wxDrawLine(hdc, r.left, r.bottom - 1, r.left, r.top);
1286         wxDrawLine(hdc, r.left, r.top, r.right, r.top);
1287
1288         (void)SelectObject(hdc, hpenLightGr);
1289         wxDrawLine(hdc, r.left + 1, r.bottom - 2, r.left + 1, r.top + 1);
1290         wxDrawLine(hdc, r.left + 1, r.top + 1, r.right - 1, r.top + 1);
1291
1292         (void)SelectObject(hdc, hpenGrey);
1293         wxDrawLine(hdc, r.left + 1, r.bottom - 1, r.right - 1, r.bottom - 1);
1294         wxDrawLine(hdc, r.right - 1, r.bottom - 1, r.right - 1, r.top);
1295     }
1296
1297     InflateRect(&rectBtn, -OD_BUTTON_MARGIN, -OD_BUTTON_MARGIN);
1298 }
1299
1300 #if wxUSE_UXTHEME
1301 void DrawXPBackground(wxButton *button, HDC hdc, RECT& rectBtn, UINT state)
1302 {
1303     wxUxThemeHandle theme(button, L"BUTTON");
1304
1305     // this array is indexed by wxButton::State values and so must be kept in
1306     // sync with it
1307     static const int uxStates[] =
1308     {
1309         PBS_NORMAL, PBS_HOT, PBS_PRESSED, PBS_DISABLED, PBS_DEFAULTED
1310     };
1311
1312     int iState = uxStates[GetButtonState(button, state)];
1313
1314     wxUxThemeEngine * const engine = wxUxThemeEngine::Get();
1315
1316     // draw parent background if needed
1317     if ( engine->IsThemeBackgroundPartiallyTransparent
1318                  (
1319                     theme,
1320                     BP_PUSHBUTTON,
1321                     iState
1322                  ) )
1323     {
1324         // Set this button as the one whose background is being erased: this
1325         // allows our WM_ERASEBKGND handler used by DrawThemeParentBackground()
1326         // to correctly align the background brush with this window instead of
1327         // the parent window to which WM_ERASEBKGND is sent. Notice that this
1328         // doesn't work with custom user-defined EVT_ERASE_BACKGROUND handlers
1329         // as they won't be aligned but unfortunately all the attempts to fix
1330         // it by shifting DC origin before calling DrawThemeParentBackground()
1331         // failed to work so we at least do this, even though this is far from
1332         // being the perfect solution.
1333         wxWindowBeingErased = button;
1334
1335         engine->DrawThemeParentBackground(GetHwndOf(button), hdc, &rectBtn);
1336
1337         wxWindowBeingErased = NULL;
1338     }
1339
1340     // draw background
1341     engine->DrawThemeBackground(theme, hdc, BP_PUSHBUTTON, iState,
1342                                 &rectBtn, NULL);
1343
1344     // calculate content area margins
1345     MARGINS margins;
1346     engine->GetThemeMargins(theme, hdc, BP_PUSHBUTTON, iState,
1347                             TMT_CONTENTMARGINS, &rectBtn, &margins);
1348     ::InflateRect(&rectBtn, -margins.cxLeftWidth, -margins.cyTopHeight);
1349     ::InflateRect(&rectBtn, -XP_BUTTON_EXTRA_MARGIN, -XP_BUTTON_EXTRA_MARGIN);
1350
1351     if ( button->UseBgCol() )
1352     {
1353         COLORREF colBg = wxColourToRGB(button->GetBackgroundColour());
1354         AutoHBRUSH hbrushBackground(colBg);
1355
1356         // don't overwrite the focus rect
1357         RECT rectClient;
1358         ::CopyRect(&rectClient, &rectBtn);
1359         ::InflateRect(&rectClient, -1, -1);
1360         FillRect(hdc, &rectClient, hbrushBackground);
1361     }
1362 }
1363 #endif // wxUSE_UXTHEME
1364
1365 } // anonymous namespace
1366
1367 // ----------------------------------------------------------------------------
1368 // owner drawn buttons support
1369 // ----------------------------------------------------------------------------
1370
1371 void wxButton::MakeOwnerDrawn()
1372 {
1373     long style = GetWindowLong(GetHwnd(), GWL_STYLE);
1374     if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
1375     {
1376         // make it so
1377         style |= BS_OWNERDRAW;
1378         SetWindowLong(GetHwnd(), GWL_STYLE, style);
1379     }
1380 }
1381
1382 bool wxButton::SetBackgroundColour(const wxColour &colour)
1383 {
1384     if ( !wxControl::SetBackgroundColour(colour) )
1385     {
1386         // nothing to do
1387         return false;
1388     }
1389
1390     MakeOwnerDrawn();
1391
1392     Refresh();
1393
1394     return true;
1395 }
1396
1397 bool wxButton::SetForegroundColour(const wxColour &colour)
1398 {
1399     if ( !wxControl::SetForegroundColour(colour) )
1400     {
1401         // nothing to do
1402         return false;
1403     }
1404
1405     MakeOwnerDrawn();
1406
1407     Refresh();
1408
1409     return true;
1410 }
1411
1412 bool wxButton::MSWOnDraw(WXDRAWITEMSTRUCT *wxdis)
1413 {
1414     LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT)wxdis;
1415     HDC hdc = lpDIS->hDC;
1416
1417     UINT state = lpDIS->itemState;
1418     bool pushed = (SendMessage(GetHwnd(), BM_GETSTATE, 0, 0) & BST_PUSHED) != 0;
1419
1420     RECT rectBtn;
1421     CopyRect(&rectBtn, &lpDIS->rcItem);
1422
1423     // draw the button background
1424     if ( !HasFlag(wxBORDER_NONE) )
1425     {
1426 #if wxUSE_UXTHEME
1427         if ( wxUxThemeEngine::GetIfActive() )
1428         {
1429             DrawXPBackground(this, hdc, rectBtn, state);
1430         }
1431         else
1432 #endif // wxUSE_UXTHEME
1433         {
1434             COLORREF colBg = wxColourToRGB(GetBackgroundColour());
1435
1436             // first, draw the background
1437             AutoHBRUSH hbrushBackground(colBg);
1438             FillRect(hdc, &rectBtn, hbrushBackground);
1439
1440             // draw the border for the current state
1441             bool selected = (state & ODS_SELECTED) != 0;
1442             if ( !selected )
1443             {
1444                 wxTopLevelWindow *
1445                     tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
1446                 if ( tlw )
1447                 {
1448                     selected = tlw->GetDefaultItem() == this;
1449                 }
1450             }
1451
1452             DrawButtonFrame(hdc, rectBtn, selected, pushed);
1453         }
1454
1455         // draw the focus rectangle if we need it
1456         if ( (state & ODS_FOCUS) && !(state & ODS_NOFOCUSRECT) )
1457         {
1458             DrawFocusRect(hdc, &rectBtn);
1459
1460 #if wxUSE_UXTHEME
1461             if ( !wxUxThemeEngine::GetIfActive() )
1462 #endif // wxUSE_UXTHEME
1463             {
1464                 if ( pushed )
1465                 {
1466                     // the label is shifted by 1 pixel to create "pushed" effect
1467                     OffsetRect(&rectBtn, 1, 1);
1468                 }
1469             }
1470         }
1471     }
1472
1473
1474     // draw the image, if any
1475     if ( m_imageData )
1476     {
1477         wxBitmap bmp = m_imageData->GetBitmap(GetButtonState(this, state));
1478         if ( !bmp.IsOk() )
1479             bmp = m_imageData->GetBitmap(State_Normal);
1480
1481         const wxSize sizeBmp = bmp.GetSize();
1482         const wxSize margin = m_imageData->GetBitmapMargins();
1483         const wxSize sizeBmpWithMargins(sizeBmp + 2*margin);
1484         wxRect rectButton(wxRectFromRECT(rectBtn));
1485
1486         // for simplicity, we start with centred rectangle and then move it to
1487         // the appropriate edge
1488         wxRect rectBitmap = wxRect(sizeBmp).CentreIn(rectButton);
1489
1490         // move bitmap only if we have a label, otherwise keep it centered
1491         if ( ShowsLabel() )
1492         {
1493             switch ( m_imageData->GetBitmapPosition() )
1494             {
1495                 default:
1496                     wxFAIL_MSG( "invalid direction" );
1497                     // fall through
1498
1499                 case wxLEFT:
1500                     rectBitmap.x = rectButton.x + margin.x;
1501                     rectButton.x += sizeBmpWithMargins.x;
1502                     rectButton.width -= sizeBmpWithMargins.x;
1503                     break;
1504
1505                 case wxRIGHT:
1506                     rectBitmap.x = rectButton.GetRight() - sizeBmp.x - margin.x;
1507                     rectButton.width -= sizeBmpWithMargins.x;
1508                     break;
1509
1510                 case wxTOP:
1511                     rectBitmap.y = rectButton.y + margin.y;
1512                     rectButton.y += sizeBmpWithMargins.y;
1513                     rectButton.height -= sizeBmpWithMargins.y;
1514                     break;
1515
1516                 case wxBOTTOM:
1517                     rectBitmap.y = rectButton.GetBottom() - sizeBmp.y - margin.y;
1518                     rectButton.height -= sizeBmpWithMargins.y;
1519                     break;
1520             }
1521         }
1522
1523         wxDCTemp dst((WXHDC)hdc);
1524         dst.DrawBitmap(bmp, rectBitmap.GetPosition(), true);
1525
1526         wxCopyRectToRECT(rectButton, rectBtn);
1527     }
1528
1529
1530     // finally draw the label
1531     if ( ShowsLabel() )
1532     {
1533         COLORREF colFg = state & ODS_DISABLED
1534                             ? ::GetSysColor(COLOR_GRAYTEXT)
1535                             : wxColourToRGB(GetForegroundColour());
1536
1537         wxTextColoursChanger changeFg(hdc, colFg, CLR_INVALID);
1538         wxBkModeChanger changeBkMode(hdc, wxBRUSHSTYLE_TRANSPARENT);
1539
1540 #if wxUSE_MARKUP
1541         if ( m_markupText )
1542         {
1543             wxDCTemp dc((WXHDC)hdc);
1544             dc.SetTextForeground(wxColour(colFg));
1545             dc.SetFont(GetFont());
1546
1547             m_markupText->Render(dc, wxRectFromRECT(rectBtn),
1548                                  state & ODS_NOACCEL
1549                                     ? wxMarkupText::Render_Default
1550                                     : wxMarkupText::Render_ShowAccels);
1551         }
1552         else // Plain text label
1553 #endif // wxUSE_MARKUP
1554         {
1555             // notice that DT_HIDEPREFIX doesn't work on old (pre-Windows 2000)
1556             // systems but by happy coincidence ODS_NOACCEL is not used under
1557             // them neither so DT_HIDEPREFIX should never be used there
1558             DrawButtonText(hdc, &rectBtn, this,
1559                            state & ODS_NOACCEL ? DT_HIDEPREFIX : 0);
1560         }
1561     }
1562
1563     return true;
1564 }
1565
1566 #endif // wxUSE_BUTTON
1567