src/msw/radiobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/radiobox.cpp
   3 // Purpose:     wxRadioBox implementation
   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_RADIOBOX
  28
  29 #include "wx/radiobox.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/hashmap.h"
  33     #include "wx/bitmap.h"
  34     #include "wx/brush.h"
  35     #include "wx/settings.h"
  36     #include "wx/log.h"
  37 #endif
  38
  39 #include "wx/msw/subwin.h"
  40
  41 #if wxUSE_TOOLTIPS
  42     #include "wx/tooltip.h"
  43 #endif // wxUSE_TOOLTIPS
  44
  45 // TODO: wxCONSTRUCTOR
  46 #if 0 // wxUSE_EXTENDED_RTTI
  47 WX_DEFINE_FLAGS( wxRadioBoxStyle )
  48
  49 wxBEGIN_FLAGS( wxRadioBoxStyle )
  50     // new style border flags, we put them first to
  51     // use them for streaming out
  52     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  53     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  54     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  55     wxFLAGS_MEMBER(wxBORDER_RAISED)
  56     wxFLAGS_MEMBER(wxBORDER_STATIC)
  57     wxFLAGS_MEMBER(wxBORDER_NONE)
  58
  59     // old style border flags
  60     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  61     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  62     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  63     wxFLAGS_MEMBER(wxRAISED_BORDER)
  64     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  65     wxFLAGS_MEMBER(wxBORDER)
  66
  67     // standard window styles
  68     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  69     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  70     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
  71     wxFLAGS_MEMBER(wxWANTS_CHARS)
  72     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
  73     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
  74     wxFLAGS_MEMBER(wxVSCROLL)
  75     wxFLAGS_MEMBER(wxHSCROLL)
  76
  77     wxFLAGS_MEMBER(wxRA_SPECIFY_COLS)
  78     wxFLAGS_MEMBER(wxRA_SPECIFY_ROWS)
  79 wxEND_FLAGS( wxRadioBoxStyle )
  80
  81 IMPLEMENT_DYNAMIC_CLASS_XTI(wxRadioBox, wxControl,"wx/radiobox.h")
  82
  83 wxBEGIN_PROPERTIES_TABLE(wxRadioBox)
  84     wxEVENT_PROPERTY( Select , wxEVT_RADIOBOX , wxCommandEvent )
  85     wxPROPERTY_FLAGS( WindowStyle , wxRadioBoxStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
  86 wxEND_PROPERTIES_TABLE()
  87
  88 #else
  89 IMPLEMENT_DYNAMIC_CLASS(wxRadioBox, wxControl)
  90 #endif
  91
  92 /*
  93     selection
  94     content
  95         label
  96         dimension
  97         item
  98 */
  99
 100 // ---------------------------------------------------------------------------
 101 // private functions
 102 // ---------------------------------------------------------------------------
 103
 104 // wnd proc for radio buttons
 105 LRESULT APIENTRY _EXPORT wxRadioBtnWndProc(HWND hWnd,
 106                                            UINT message,
 107                                            WPARAM wParam,
 108                                            LPARAM lParam);
 109
 110 // ---------------------------------------------------------------------------
 111 // global vars
 112 // ---------------------------------------------------------------------------
 113
 114 namespace
 115 {
 116
 117 // the pointer to standard radio button wnd proc
 118 WXFARPROC s_wndprocRadioBtn = (WXFARPROC)NULL;
 119
 120 // Hash allowing to find wxRadioBox containing the given radio button by its
 121 // HWND. This is used by (subclassed) radio button window proc to find the
 122 // radio box it belongs to.
 123 WX_DECLARE_HASH_MAP(HWND, wxRadioBox *,
 124                     wxPointerHash, wxPointerEqual,
 125                     RadioBoxFromButton);
 126
 127 RadioBoxFromButton gs_boxFromButton;
 128
 129 } // anonymous namespace
 130
 131 // ===========================================================================
 132 // implementation
 133 // ===========================================================================
 134
 135 /* static */
 136 wxRadioBox* wxRadioBox::GetFromRadioButtonHWND(WXHWND hwnd)
 137 {
 138     const RadioBoxFromButton::const_iterator it = gs_boxFromButton.find(hwnd);
 139     return it == gs_boxFromButton.end() ? NULL : it->second;
 140 }
 141
 142 // ---------------------------------------------------------------------------
 143 // wxRadioBox creation
 144 // ---------------------------------------------------------------------------
 145
 146 // Radio box item
 147 void wxRadioBox::Init()
 148 {
 149     m_selectedButton = wxNOT_FOUND;
 150     m_radioButtons = NULL;
 151     m_dummyHwnd = NULL;
 152     m_radioWidth = NULL;
 153     m_radioHeight = NULL;
 154 }
 155
 156 bool wxRadioBox::Create(wxWindow *parent,
 157                         wxWindowID id,
 158                         const wxString& title,
 159                         const wxPoint& pos,
 160                         const wxSize& size,
 161                         int n,
 162                         const wxString choices[],
 163                         int majorDim,
 164                         long style,
 165                         const wxValidator& val,
 166                         const wxString& name)
 167 {
 168     // common initialization
 169     if ( !wxStaticBox::Create(parent, id, title, pos, size, style, name) )
 170         return false;
 171
 172     // the code elsewhere in this file supposes that either wxRA_SPECIFY_COLS
 173     // or wxRA_SPECIFY_ROWS is set, ensure that this is indeed the case
 174     if ( !(style & (wxRA_SPECIFY_ROWS | wxRA_SPECIFY_COLS)) )
 175         style |= wxRA_SPECIFY_COLS;
 176
 177 #if wxUSE_VALIDATORS
 178     SetValidator(val);
 179 #else
 180     wxUnusedVar(val);
 181 #endif // wxUSE_VALIDATORS/!wxUSE_VALIDATORS
 182
 183     // We need an extra one to keep track of the 'dummy' item we
 184     // create to end the radio group, so it will be destroyed and
 185     // it's id will be released.  But we want it separate from the
 186     // other buttons since the wxSubwindows will operate on it as
 187     // well and we just want to ignore it until destroying it.
 188     // For instance, we don't want the bounding box of the radio
 189     // buttons to include the dummy button
 190     m_radioButtons = new wxSubwindows(n);
 191
 192     m_radioWidth = new int[n];
 193     m_radioHeight = new int[n];
 194
 195     for ( int i = 0; i < n; i++ )
 196     {
 197         m_radioWidth[i] =
 198         m_radioHeight[i] = wxDefaultCoord;
 199         long styleBtn = BS_AUTORADIOBUTTON | WS_TABSTOP | WS_CHILD | WS_VISIBLE;
 200         if ( i == 0 )
 201             styleBtn |= WS_GROUP;
 202
 203         wxWindowIDRef subid = NewControlId();
 204
 205         HWND hwndBtn = ::CreateWindow(wxT("BUTTON"),
 206                                       choices[i].t_str(),
 207                                       styleBtn,
 208                                       0, 0, 0, 0,   // will be set in SetSize()
 209                                       GetHwndOf(parent),
 210                                       (HMENU)wxUIntToPtr(subid.GetValue()),
 211                                       wxGetInstance(),
 212                                       NULL);
 213
 214         if ( !hwndBtn )
 215         {
 216             wxLogLastError(wxT("CreateWindow(radio btn)"));
 217
 218             return false;
 219         }
 220
 221         // Keep track of the subwindow
 222         m_radioButtons->Set(i, hwndBtn, subid);
 223
 224         SubclassRadioButton((WXHWND)hwndBtn);
 225
 226         // Also, make it a subcontrol of this control
 227         m_subControls.Add(subid);
 228     }
 229
 230     // Create a dummy radio control to end the group.
 231     m_dummyId = NewControlId();
 232
 233     m_dummyHwnd = (WXHWND)::CreateWindow(wxT("BUTTON"),
 234                          wxEmptyString,
 235                          WS_GROUP | BS_AUTORADIOBUTTON | WS_CHILD,
 236                          0, 0, 0, 0, GetHwndOf(parent),
 237                          (HMENU)wxUIntToPtr(m_dummyId.GetValue()),
 238                          wxGetInstance(), NULL);
 239
 240
 241     m_radioButtons->SetFont(GetFont());
 242
 243 #ifdef __WXWINCE__
 244     // Set the z-order correctly
 245     SetWindowPos(GetHwnd(), HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE);
 246 #endif
 247
 248     SetMajorDim(majorDim == 0 ? n : majorDim, style);
 249     SetSelection(0);
 250     SetSize(pos.x, pos.y, size.x, size.y);
 251
 252     // Now that we have items determine what is the best size and set it.
 253     SetInitialSize(size);
 254
 255     // And update all the buttons positions to match it.
 256     const wxSize actualSize = GetSize();
 257     PositionAllButtons(pos.x, pos.y, actualSize.x, actualSize.y);
 258
 259     return true;
 260 }
 261
 262 bool wxRadioBox::Create(wxWindow *parent,
 263                         wxWindowID id,
 264                         const wxString& title,
 265                         const wxPoint& pos,
 266                         const wxSize& size,
 267                         const wxArrayString& choices,
 268                         int majorDim,
 269                         long style,
 270                         const wxValidator& val,
 271                         const wxString& name)
 272 {
 273     wxCArrayString chs(choices);
 274     return Create(parent, id, title, pos, size, chs.GetCount(),
 275                   chs.GetStrings(), majorDim, style, val, name);
 276 }
 277
 278 wxRadioBox::~wxRadioBox()
 279 {
 280     SendDestroyEvent();
 281
 282     // Unsubclass all the radio buttons and remove their soon-to-be-invalid
 283     // HWNDs from the global map. Notice that we need to unsubclass because
 284     // otherwise we'd need the entries in gs_boxFromButton for the buttons
 285     // being deleted to handle the messages generated during their destruction.
 286     for ( size_t item = 0; item < m_radioButtons->GetCount(); item++ )
 287     {
 288         HWND hwnd = m_radioButtons->Get(item);
 289
 290         wxSetWindowProc(hwnd, reinterpret_cast<WNDPROC>(s_wndprocRadioBtn));
 291         gs_boxFromButton.erase(hwnd);
 292     }
 293
 294     delete m_radioButtons;
 295
 296     if ( m_dummyHwnd )
 297         DestroyWindow((HWND)m_dummyHwnd);
 298
 299     delete[] m_radioWidth;
 300     delete[] m_radioHeight;
 301 }
 302
 303 // NB: if this code is changed, wxGetWindowForHWND() which relies on having the
 304 //     radiobox pointer in GWL_USERDATA for radio buttons must be updated too!
 305 void wxRadioBox::SubclassRadioButton(WXHWND hWndBtn)
 306 {
 307     HWND hwndBtn = (HWND)hWndBtn;
 308
 309     if ( !s_wndprocRadioBtn )
 310         s_wndprocRadioBtn = (WXFARPROC)wxGetWindowProc(hwndBtn);
 311
 312     wxSetWindowProc(hwndBtn, wxRadioBtnWndProc);
 313
 314     gs_boxFromButton[hwndBtn] = this;
 315 }
 316
 317 // ----------------------------------------------------------------------------
 318 // events generation
 319 // ----------------------------------------------------------------------------
 320
 321 bool wxRadioBox::MSWCommand(WXUINT cmd, WXWORD id_)
 322 {
 323     const int id = (signed short)id_;
 324
 325     if ( cmd == BN_CLICKED )
 326     {
 327         if (id == GetId())
 328             return true;
 329
 330         int selectedButton = wxNOT_FOUND;
 331
 332         const unsigned int count = GetCount();
 333         for ( unsigned int i = 0; i < count; i++ )
 334         {
 335             const HWND hwndBtn = (*m_radioButtons)[i];
 336             if ( id == wxGetWindowId(hwndBtn) )
 337             {
 338                 // we can get BN_CLICKED for a button which just became focused
 339                 // but it may not be checked, in which case we shouldn't
 340                 // generate a radiobox selection changed event for it
 341                 if ( ::SendMessage(hwndBtn, BM_GETCHECK, 0, 0) == BST_CHECKED )
 342                     selectedButton = i;
 343
 344                 break;
 345             }
 346         }
 347
 348         if ( selectedButton == wxNOT_FOUND )
 349         {
 350             // just ignore it - due to a hack with WM_NCHITTEST handling in our
 351             // wnd proc, we can receive dummy click messages when we click near
 352             // the radiobox edge (this is ugly but Julian wouldn't let me get
 353             // rid of this...)
 354             return false;
 355         }
 356
 357         if ( selectedButton != m_selectedButton )
 358         {
 359             m_selectedButton = selectedButton;
 360
 361             SendNotificationEvent();
 362         }
 363         //else: don't generate events when the selection doesn't change
 364
 365         return true;
 366     }
 367     else
 368         return false;
 369 }
 370
 371 void wxRadioBox::Command(wxCommandEvent & event)
 372 {
 373     SetSelection (event.GetInt());
 374     SetFocus();
 375     ProcessCommand(event);
 376 }
 377
 378 void wxRadioBox::SendNotificationEvent()
 379 {
 380     wxCommandEvent event(wxEVT_RADIOBOX, m_windowId);
 381     event.SetInt( m_selectedButton );
 382     event.SetString(GetString(m_selectedButton));
 383     event.SetEventObject( this );
 384     ProcessCommand(event);
 385 }
 386
 387 // ----------------------------------------------------------------------------
 388 // simple accessors
 389 // ----------------------------------------------------------------------------
 390
 391 unsigned int wxRadioBox::GetCount() const
 392 {
 393     return m_radioButtons ? m_radioButtons->GetCount() : 0u;
 394 }
 395
 396 void wxRadioBox::SetString(unsigned int item, const wxString& label)
 397 {
 398     wxCHECK_RET( IsValid(item), wxT("invalid radiobox index") );
 399
 400     m_radioWidth[item] =
 401     m_radioHeight[item] = wxDefaultCoord;
 402
 403     ::SetWindowText((*m_radioButtons)[item], label.c_str());
 404
 405     InvalidateBestSize();
 406 }
 407
 408 void wxRadioBox::SetSelection(int N)
 409 {
 410     wxCHECK_RET( IsValid(N), wxT("invalid radiobox index") );
 411
 412     // unselect the old button
 413     if ( m_selectedButton != wxNOT_FOUND )
 414         ::SendMessage((*m_radioButtons)[m_selectedButton], BM_SETCHECK, 0, 0L);
 415
 416     // and select the new one
 417     ::SendMessage((*m_radioButtons)[N], BM_SETCHECK, 1, 0L);
 418
 419     m_selectedButton = N;
 420 }
 421
 422 // Find string for position
 423 wxString wxRadioBox::GetString(unsigned int item) const
 424 {
 425     wxCHECK_MSG( IsValid(item), wxEmptyString,
 426                  wxT("invalid radiobox index") );
 427
 428     return wxGetWindowText((*m_radioButtons)[item]);
 429 }
 430
 431 void wxRadioBox::SetFocus()
 432 {
 433     if ( GetCount() > 0 )
 434     {
 435         ::SetFocus((*m_radioButtons)[m_selectedButton == wxNOT_FOUND
 436                                         ? 0
 437                                         : m_selectedButton]);
 438     }
 439 }
 440
 441 // Enable a specific button
 442 bool wxRadioBox::Enable(unsigned int item, bool enable)
 443 {
 444     wxCHECK_MSG( IsValid(item), false,
 445                  wxT("invalid item in wxRadioBox::Enable()") );
 446
 447     BOOL ret = MSWEnableHWND((*m_radioButtons)[item], enable);
 448
 449     return (ret == 0) != enable;
 450 }
 451
 452 bool wxRadioBox::IsItemEnabled(unsigned int item) const
 453 {
 454     wxCHECK_MSG( IsValid(item), false,
 455                  wxT("invalid item in wxRadioBox::IsItemEnabled()") );
 456
 457     return ::IsWindowEnabled((*m_radioButtons)[item]) != 0;
 458 }
 459
 460 // Show a specific button
 461 bool wxRadioBox::Show(unsigned int item, bool show)
 462 {
 463     wxCHECK_MSG( IsValid(item), false,
 464                  wxT("invalid item in wxRadioBox::Show()") );
 465
 466     BOOL ret = ::ShowWindow((*m_radioButtons)[item], show ? SW_SHOW : SW_HIDE);
 467
 468     bool changed = (ret != 0) != show;
 469     if ( changed )
 470     {
 471         InvalidateBestSize();
 472     }
 473
 474     return changed;
 475 }
 476
 477 bool wxRadioBox::IsItemShown(unsigned int item) const
 478 {
 479     wxCHECK_MSG( IsValid(item), false,
 480                  wxT("invalid item in wxRadioBox::IsItemShown()") );
 481
 482     // don't use IsWindowVisible() here because it would return false if the
 483     // radiobox itself is hidden while we want to only return false if this
 484     // button specifically is hidden
 485     return (::GetWindowLong((*m_radioButtons)[item],
 486                             GWL_STYLE) & WS_VISIBLE) != 0;
 487 }
 488
 489 #if wxUSE_TOOLTIPS
 490
 491 bool wxRadioBox::HasToolTips() const
 492 {
 493     return wxStaticBox::HasToolTips() || wxRadioBoxBase::HasItemToolTips();
 494 }
 495
 496 void wxRadioBox::DoSetItemToolTip(unsigned int item, wxToolTip *tooltip)
 497 {
 498     // we have already checked for the item to be valid in wxRadioBoxBase
 499     const HWND hwndRbtn = (*m_radioButtons)[item];
 500     if ( tooltip != NULL )
 501         tooltip->AddOtherWindow(hwndRbtn);
 502     else // unset the tooltip
 503         wxToolTip::Remove(hwndRbtn, 0, wxRect(0,0,0,0));
 504         // the second parameter can be zero since it's ignored by Remove()
 505         // as we pass a rect for which wxRect::IsEmpty()==true...
 506 }
 507
 508 #endif // wxUSE_TOOLTIPS
 509
 510 bool wxRadioBox::Reparent(wxWindowBase *newParent)
 511 {
 512     if ( !wxStaticBox::Reparent(newParent) )
 513     {
 514         return false;
 515     }
 516
 517     HWND hwndParent = GetHwndOf(GetParent());
 518     for ( size_t item = 0; item < m_radioButtons->GetCount(); item++ )
 519     {
 520         ::SetParent((*m_radioButtons)[item], hwndParent);
 521     }
 522 #ifdef __WXWINCE__
 523     // put static box under the buttons in the Z-order
 524     SetWindowPos(GetHwnd(), HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE);
 525 #endif
 526     return true;
 527 }
 528
 529 WX_FORWARD_STD_METHODS_TO_SUBWINDOWS(wxRadioBox, wxStaticBox, m_radioButtons)
 530
 531 // ----------------------------------------------------------------------------
 532 // size calculations
 533 // ----------------------------------------------------------------------------
 534
 535 wxSize wxRadioBox::GetMaxButtonSize() const
 536 {
 537     // calculate the max button size
 538     int widthMax = 0,
 539         heightMax = 0;
 540     const unsigned int count = GetCount();
 541     for ( unsigned int i = 0 ; i < count; i++ )
 542     {
 543         int width, height;
 544         if ( m_radioWidth[i] < 0 )
 545         {
 546             GetTextExtent(wxGetWindowText((*m_radioButtons)[i]), &width, &height);
 547
 548             // adjust the size to take into account the radio box itself
 549             // FIXME this is totally bogus!
 550             width += RADIO_SIZE;
 551             height *= 3;
 552             height /= 2;
 553         }
 554         else
 555         {
 556             width = m_radioWidth[i];
 557             height = m_radioHeight[i];
 558         }
 559
 560         if ( widthMax < width )
 561             widthMax = width;
 562         if ( heightMax < height )
 563             heightMax = height;
 564     }
 565
 566     return wxSize(widthMax, heightMax);
 567 }
 568
 569 wxSize wxRadioBox::GetTotalButtonSize(const wxSize& sizeBtn) const
 570 {
 571     // the radiobox should be big enough for its buttons
 572     int cx1, cy1;
 573     wxGetCharSize(m_hWnd, &cx1, &cy1, GetFont());
 574
 575     int extraHeight = cy1;
 576
 577     int height = GetRowCount() * sizeBtn.y + cy1/2 + extraHeight;
 578     int width  = GetColumnCount() * (sizeBtn.x + cx1) + cx1;
 579
 580     // Add extra space under the label, if it exists.
 581     if (!wxControl::GetLabel().empty())
 582         height += cy1/2;
 583
 584     // and also wide enough for its label
 585     int widthLabel;
 586     GetTextExtent(GetLabelText(), &widthLabel, NULL);
 587     widthLabel += RADIO_SIZE; // FIXME this is bogus too
 588     if ( widthLabel > width )
 589         width = widthLabel;
 590
 591     return wxSize(width, height);
 592 }
 593
 594 wxSize wxRadioBox::DoGetBestSize() const
 595 {
 596     if ( !m_radioButtons )
 597     {
 598         // if we're not fully initialized yet, we can't meaningfully compute
 599         // our best size, we'll do it later
 600         return wxSize(1, 1);
 601     }
 602
 603     wxSize best = GetTotalButtonSize(GetMaxButtonSize());
 604     CacheBestSize(best);
 605     return best;
 606 }
 607
 608 void wxRadioBox::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 609 {
 610     if ( (width == wxDefaultCoord && (sizeFlags & wxSIZE_AUTO_WIDTH)) ||
 611             (height == wxDefaultCoord && (sizeFlags & wxSIZE_AUTO_HEIGHT)) )
 612     {
 613         // Attempt to have a look coherent with other platforms: We compute the
 614         // biggest toggle dim, then we align all items according this value.
 615         const wxSize totSize = GetTotalButtonSize(GetMaxButtonSize());
 616
 617         // only change our width/height if asked for
 618         if ( width == wxDefaultCoord && (sizeFlags & wxSIZE_AUTO_WIDTH) )
 619             width = totSize.x;
 620
 621         if ( height == wxDefaultCoord && (sizeFlags & wxSIZE_AUTO_HEIGHT) )
 622             height = totSize.y;
 623     }
 624
 625     wxStaticBox::DoSetSize(x, y, width, height);
 626 }
 627
 628 void wxRadioBox::DoMoveWindow(int x, int y, int width, int height)
 629 {
 630     wxStaticBox::DoMoveWindow(x, y, width, height);
 631
 632     PositionAllButtons(x, y, width, height);
 633 }
 634
 635 void
 636 wxRadioBox::PositionAllButtons(int x, int y, int width, int WXUNUSED(height))
 637 {
 638     wxSize maxSize = GetMaxButtonSize();
 639     int maxWidth = maxSize.x,
 640         maxHeight = maxSize.y;
 641
 642     // Now position all the buttons: the current button will be put at
 643     // wxPoint(x_offset, y_offset) and the new row/column will start at
 644     // startX/startY. The size of all buttons will be the same wxSize(maxWidth,
 645     // maxHeight) except for the buttons in the last column which should extend
 646     // to the right border of radiobox and thus can be wider than this.
 647
 648     // Also, remember that wxRA_SPECIFY_COLS means that we arrange buttons in
 649     // left to right order and GetMajorDim() is the number of columns while
 650     // wxRA_SPECIFY_ROWS means that the buttons are arranged top to bottom and
 651     // GetMajorDim() is the number of rows.
 652
 653     int cx1, cy1;
 654     wxGetCharSize(m_hWnd, &cx1, &cy1, GetFont());
 655
 656     int x_offset = x + cx1;
 657     int y_offset = y + cy1;
 658
 659     // Add extra space under the label, if it exists.
 660     if (!wxControl::GetLabel().empty())
 661         y_offset += cy1/2;
 662
 663     int startX = x_offset;
 664     int startY = y_offset;
 665
 666     const unsigned int count = GetCount();
 667     for (unsigned int i = 0; i < count; i++)
 668     {
 669         // the last button in the row may be wider than the other ones as the
 670         // radiobox may be wider than the sum of the button widths (as it
 671         // happens, for example, when the radiobox label is very long)
 672         bool isLastInTheRow;
 673         if ( m_windowStyle & wxRA_SPECIFY_COLS )
 674         {
 675             // item is the last in its row if it is a multiple of the number of
 676             // columns or if it is just the last item
 677             unsigned int n = i + 1;
 678             isLastInTheRow = ((n % GetMajorDim()) == 0) || (n == count);
 679         }
 680         else // wxRA_SPECIFY_ROWS
 681         {
 682             // item is the last in the row if it is in the last columns
 683             isLastInTheRow = i >= (count/GetMajorDim())*GetMajorDim();
 684         }
 685
 686         // is this the start of new row/column?
 687         if ( i && (i % GetMajorDim() == 0) )
 688         {
 689             if ( m_windowStyle & wxRA_SPECIFY_ROWS )
 690             {
 691                 // start of new column
 692                 y_offset = startY;
 693                 x_offset += maxWidth + cx1;
 694             }
 695             else // start of new row
 696             {
 697                 x_offset = startX;
 698                 y_offset += maxHeight;
 699                 if (m_radioWidth[0]>0)
 700                     y_offset += cy1/2;
 701             }
 702         }
 703
 704         int widthBtn;
 705         if ( isLastInTheRow )
 706         {
 707             // make the button go to the end of radio box
 708             widthBtn = startX + width - x_offset - 2*cx1;
 709             if ( widthBtn < maxWidth )
 710                 widthBtn = maxWidth;
 711         }
 712         else
 713         {
 714             // normal button, always of the same size
 715             widthBtn = maxWidth;
 716         }
 717
 718         // make all buttons of the same, maximal size - like this they cover
 719         // the radiobox entirely and the radiobox tooltips are always shown
 720         // (otherwise they are not when the mouse pointer is in the radiobox
 721         // part not belonging to any radiobutton)
 722         DoMoveSibling((*m_radioButtons)[i], x_offset, y_offset, widthBtn, maxHeight);
 723
 724         // where do we put the next button?
 725         if ( m_windowStyle & wxRA_SPECIFY_ROWS )
 726         {
 727             // below this one
 728             y_offset += maxHeight;
 729             if (m_radioWidth[0]>0)
 730                 y_offset += cy1/2;
 731         }
 732         else
 733         {
 734             // to the right of this one
 735             x_offset += widthBtn + cx1;
 736         }
 737     }
 738 }
 739
 740 int wxRadioBox::GetItemFromPoint(const wxPoint& pt) const
 741 {
 742     const unsigned int count = GetCount();
 743     for ( unsigned int i = 0; i < count; i++ )
 744     {
 745         RECT rect = wxGetWindowRect((*m_radioButtons)[i]);
 746
 747         if ( rect.left <= pt.x && pt.x < rect.right &&
 748                 rect.top  <= pt.y && pt.y < rect.bottom )
 749         {
 750             return i;
 751         }
 752     }
 753
 754     return wxNOT_FOUND;
 755 }
 756
 757 // ----------------------------------------------------------------------------
 758 // radio box drawing
 759 // ----------------------------------------------------------------------------
 760
 761 #ifndef __WXWINCE__
 762
 763 WXHRGN wxRadioBox::MSWGetRegionWithoutChildren()
 764 {
 765     RECT rc;
 766     ::GetWindowRect(GetHwnd(), &rc);
 767     HRGN hrgn = ::CreateRectRgn(rc.left, rc.top, rc.right + 1, rc.bottom + 1);
 768
 769     const unsigned int count = GetCount();
 770     for ( unsigned int i = 0; i < count; ++i )
 771     {
 772         // don't clip out hidden children
 773         if ( !IsItemShown(i) )
 774             continue;
 775
 776         ::GetWindowRect((*m_radioButtons)[i], &rc);
 777         AutoHRGN hrgnchild(::CreateRectRgnIndirect(&rc));
 778         ::CombineRgn(hrgn, hrgn, hrgnchild, RGN_DIFF);
 779     }
 780
 781     return (WXHRGN)hrgn;
 782 }
 783
 784 #endif // __WXWINCE__
 785
 786 // ---------------------------------------------------------------------------
 787 // window proc for radio buttons
 788 // ---------------------------------------------------------------------------
 789
 790 LRESULT APIENTRY _EXPORT wxRadioBtnWndProc(HWND hwnd,
 791                                            UINT message,
 792                                            WPARAM wParam,
 793                                            LPARAM lParam)
 794 {
 795
 796     wxRadioBox * const radiobox = wxRadioBox::GetFromRadioButtonHWND(hwnd);
 797     wxCHECK_MSG( radiobox, 0, wxT("Should have the associated radio box") );
 798
 799     switch ( message )
 800     {
 801         case WM_GETDLGCODE:
 802             // we must tell IsDialogMessage()/our kbd processing code that we
 803             // want to process arrows ourselves because neither of them is
 804             // smart enough to handle arrows properly for us
 805             {
 806                 long lDlgCode = ::CallWindowProc(CASTWNDPROC s_wndprocRadioBtn, hwnd,
 807                                                  message, wParam, lParam);
 808
 809                 return lDlgCode | DLGC_WANTARROWS;
 810             }
 811
 812         case WM_KEYDOWN:
 813             {
 814                 bool processed = true;
 815
 816                 wxDirection dir;
 817                 switch ( wParam )
 818                 {
 819                     case VK_UP:
 820                         dir = wxUP;
 821                         break;
 822
 823                     case VK_LEFT:
 824                         dir = wxLEFT;
 825                         break;
 826
 827                     case VK_DOWN:
 828                         dir = wxDOWN;
 829                         break;
 830
 831                     case VK_RIGHT:
 832                         dir = wxRIGHT;
 833                         break;
 834
 835                     default:
 836                         processed = false;
 837
 838                         // just to suppress the compiler warning
 839                         dir = wxALL;
 840                 }
 841
 842                 if ( processed )
 843                 {
 844                     int selOld = radiobox->GetSelection();
 845                     int selNew = radiobox->GetNextItem
 846                                  (
 847                                   selOld,
 848                                   dir,
 849                                   radiobox->GetWindowStyle()
 850                                  );
 851
 852                     if ( selNew != selOld )
 853                     {
 854                         radiobox->SetSelection(selNew);
 855                         radiobox->SetFocus();
 856
 857                         // emulate the button click
 858                         radiobox->SendNotificationEvent();
 859
 860                         return 0;
 861                     }
 862                 }
 863             }
 864             break;
 865
 866         case WM_SETFOCUS:
 867         case WM_KILLFOCUS:
 868             {
 869                 // if we don't do this, no focus events are generated for the
 870                 // radiobox and, besides, we need to notify the parent about
 871                 // the focus change, otherwise the focus handling logic in
 872                 // wxControlContainer doesn't work
 873                 if ( message == WM_SETFOCUS )
 874                     radiobox->HandleSetFocus((WXHWND)wParam);
 875                 else
 876                     radiobox->HandleKillFocus((WXHWND)wParam);
 877             }
 878             break;
 879
 880 #ifndef __WXWINCE__
 881         case WM_HELP:
 882             {
 883                 bool processed = false;
 884
 885                 wxEvtHandler * const handler = radiobox->GetEventHandler();
 886
 887                 HELPINFO* info = (HELPINFO*) lParam;
 888                 if ( info->iContextType == HELPINFO_WINDOW )
 889                 {
 890                     for ( wxWindow* subjectOfHelp = radiobox;
 891                           subjectOfHelp;
 892                           subjectOfHelp = subjectOfHelp->GetParent() )
 893                     {
 894                         wxHelpEvent helpEvent(wxEVT_HELP,
 895                                               subjectOfHelp->GetId(),
 896                                               wxPoint(info->MousePos.x,
 897                                                       info->MousePos.y));
 898                         helpEvent.SetEventObject(radiobox);
 899                         if ( handler->ProcessEvent(helpEvent) )
 900                         {
 901                             processed = true;
 902                             break;
 903                         }
 904                     }
 905                 }
 906                 else if (info->iContextType == HELPINFO_MENUITEM)
 907                 {
 908                     wxHelpEvent helpEvent(wxEVT_HELP, info->iCtrlId);
 909                     helpEvent.SetEventObject(radiobox);
 910                     processed = handler->ProcessEvent(helpEvent);
 911                 }
 912
 913                 if ( processed )
 914                     return 0;
 915             }
 916             break;
 917 #endif // !__WXWINCE__
 918     }
 919
 920     return ::CallWindowProc(CASTWNDPROC s_wndprocRadioBtn, hwnd, message, wParam, lParam);
 921 }
 922
 923 #endif // wxUSE_RADIOBOX