src/msw/radiobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        radiobox.cpp
   3 // Purpose:     wxRadioBox
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "radiobox.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/bitmap.h"
  33     #include "wx/brush.h"
  34     #include "wx/radiobox.h"
  35     #include "wx/log.h"
  36 #endif
  37
  38 #include "wx/msw/private.h"
  39
  40 #if wxUSE_TOOLTIPS
  41
  42 #ifndef __GNUWIN32__
  43     #include <commctrl.h>
  44 #endif
  45
  46     #include "wx/tooltip.h"
  47 #endif // wxUSE_TOOLTIPS
  48
  49 IMPLEMENT_DYNAMIC_CLASS(wxRadioBox, wxControl)
  50
  51 // VZ: the new behaviour is to create the radio buttons as children of the
  52 //     radiobox instead of creating them as children of the radiobox' parent.
  53 //
  54 //     This seems more logical, more consistent with what other frameworks do
  55 //     and allows tooltips to work with radioboxes, so there should be no
  56 //     reason to revert to the backward compatible behaviour - but I still
  57 //     leave this possibility just in case.
  58
  59 #define RADIOBTN_PARENT_IS_RADIOBOX 1
  60
  61 // ---------------------------------------------------------------------------
  62 // private functions
  63 // ---------------------------------------------------------------------------
  64
  65 // wnd proc for radio buttons
  66 #ifdef __WIN32__
  67 LRESULT APIENTRY _EXPORT wxRadioBtnWndProc(HWND hWnd,
  68                                            UINT message,
  69                                            WPARAM wParam,
  70                                            LPARAM lParam);
  71
  72 // ---------------------------------------------------------------------------
  73 // global vars
  74 // ---------------------------------------------------------------------------
  75
  76 // the pointer to standard radio button wnd proc
  77 static WXFARPROC s_wndprocRadioBtn = (WXFARPROC)NULL;
  78
  79 #endif // __WIN32__
  80
  81 // ===========================================================================
  82 // implementation
  83 // ===========================================================================
  84
  85 // ---------------------------------------------------------------------------
  86 // wxRadioBox
  87 // ---------------------------------------------------------------------------
  88
  89 int wxRadioBox::GetNumVer() const
  90 {
  91     if ( m_windowStyle & wxRA_SPECIFY_ROWS )
  92     {
  93         return m_majorDim;
  94     }
  95     else
  96     {
  97         return (m_noItems + m_majorDim - 1)/m_majorDim;
  98     }
  99 }
 100
 101 int wxRadioBox::GetNumHor() const
 102 {
 103     if ( m_windowStyle & wxRA_SPECIFY_ROWS )
 104     {
 105         return (m_noItems + m_majorDim - 1)/m_majorDim;
 106     }
 107     else
 108     {
 109         return m_majorDim;
 110     }
 111 }
 112
 113 bool wxRadioBox::MSWCommand(WXUINT cmd, WXWORD id)
 114 {
 115     if ( cmd == BN_CLICKED )
 116     {
 117         int selectedButton = -1;
 118
 119         for ( int i = 0; i < m_noItems; i++ )
 120         {
 121             if ( id == wxGetWindowId(m_radioButtons[i]) )
 122             {
 123                 selectedButton = i;
 124
 125                 break;
 126             }
 127         }
 128
 129         wxASSERT_MSG( selectedButton != -1, wxT("click from alien button?") );
 130
 131         if ( selectedButton != m_selectedButton )
 132         {
 133             m_selectedButton = selectedButton;
 134
 135             SendNotificationEvent();
 136         }
 137         //else: don't generate events when the selection doesn't change
 138
 139         return TRUE;
 140     }
 141     else
 142         return FALSE;
 143 }
 144
 145 #if WXWIN_COMPATIBILITY
 146 wxRadioBox::wxRadioBox(wxWindow *parent, wxFunction func, const char *title,
 147         int x, int y, int width, int height,
 148         int n, char **choices,
 149         int majorDim, long style, const char *name)
 150 {
 151     wxString *choices2 = new wxString[n];
 152     for ( int i = 0; i < n; i ++) choices2[i] = choices[i];
 153     Create(parent, -1, title, wxPoint(x, y), wxSize(width, height), n, choices2, majorDim, style,
 154             wxDefaultValidator, name);
 155     Callback(func);
 156     delete choices2;
 157 }
 158
 159 #endif
 160
 161 // Radio box item
 162 wxRadioBox::wxRadioBox()
 163 {
 164     m_selectedButton = -1;
 165     m_noItems = 0;
 166     m_noRowsOrCols = 0;
 167     m_radioButtons = NULL;
 168     m_majorDim = 0;
 169     m_radioWidth = NULL;
 170     m_radioHeight = NULL;
 171 }
 172
 173 bool wxRadioBox::Create(wxWindow *parent,
 174                         wxWindowID id,
 175                         const wxString& title,
 176                         const wxPoint& pos,
 177                         const wxSize& size,
 178                         int n,
 179                         const wxString choices[],
 180                         int majorDim,
 181                         long style,
 182                         const wxValidator& val,
 183                         const wxString& name)
 184 {
 185     // initialize members
 186     m_selectedButton = -1;
 187     m_noItems = 0;
 188
 189     m_majorDim =  majorDim == 0 ? n : majorDim;
 190     m_noRowsOrCols = majorDim;
 191
 192     // common initialization
 193     if ( !CreateControl(parent, id, pos, size, style, val, name) )
 194         return FALSE;
 195
 196     // create the static box
 197     if ( !MSWCreateControl(wxT("BUTTON"), BS_GROUPBOX, pos, size, title, 0) )
 198         return FALSE;
 199
 200     // and now create the buttons
 201     m_noItems = n;
 202 #if RADIOBTN_PARENT_IS_RADIOBOX
 203     HWND hwndParent = GetHwnd();
 204 #else
 205     HWND hwndParent = GetHwndOf(parent);
 206 #endif
 207
 208     // Some radio boxes test consecutive id.
 209     (void)NewControlId();
 210     m_radioButtons = new WXHWND[n];
 211     m_radioWidth = new int[n];
 212     m_radioHeight = new int[n];
 213
 214     WXHFONT hfont = 0;
 215     wxFont& font = GetFont();
 216     if ( font.Ok() )
 217     {
 218         hfont = font.GetResourceHandle();
 219     }
 220
 221     for ( int i = 0; i < n; i++ )
 222     {
 223         m_radioWidth[i] =
 224         m_radioHeight[i] = -1;
 225         long styleBtn = BS_AUTORADIOBUTTON | WS_TABSTOP | WS_CHILD | WS_VISIBLE;
 226         if ( i == 0 && style == 0 )
 227             styleBtn |= WS_GROUP;
 228
 229         long newId = NewControlId();
 230
 231         HWND hwndBtn = ::CreateWindow(_T("BUTTON"),
 232                                       choices[i],
 233                                       styleBtn,
 234                                       0, 0, 0, 0,   // will be set in SetSize()
 235                                       hwndParent,
 236                                       (HMENU)newId,
 237                                       wxGetInstance(),
 238                                       NULL);
 239
 240         if ( !hwndBtn )
 241         {
 242             wxLogLastError("CreateWindow(radio btn)");
 243
 244             return FALSE;
 245         }
 246
 247         m_radioButtons[i] = (WXHWND)hwndBtn;
 248
 249         SubclassRadioButton((WXHWND)hwndBtn);
 250
 251         if ( hfont )
 252         {
 253             ::SendMessage(hwndBtn, WM_SETFONT, (WPARAM)hfont, 0L);
 254         }
 255
 256         m_subControls.Add(newId);
 257     }
 258
 259     // Create a dummy radio control to end the group.
 260     (void)::CreateWindow(_T("BUTTON"),
 261                          _T(""),
 262                          WS_GROUP | BS_AUTORADIOBUTTON | WS_CHILD,
 263                          0, 0, 0, 0, hwndParent,
 264                          (HMENU)NewControlId(), wxGetInstance(), NULL);
 265
 266     SetSelection(0);
 267
 268     SetSize(pos.x, pos.y, size.x, size.y);
 269
 270     return TRUE;
 271 }
 272
 273 wxRadioBox::~wxRadioBox()
 274 {
 275     m_isBeingDeleted = TRUE;
 276
 277     if (m_radioButtons)
 278     {
 279         int i;
 280         for (i = 0; i < m_noItems; i++)
 281             ::DestroyWindow((HWND)m_radioButtons[i]);
 282         delete[] m_radioButtons;
 283     }
 284
 285     if (m_radioWidth)
 286         delete[] m_radioWidth;
 287     if (m_radioHeight)
 288         delete[] m_radioHeight;
 289
 290 }
 291
 292 wxString wxRadioBox::GetLabel(int item) const
 293 {
 294     wxCHECK_MSG( item >= 0 && item < m_noItems, wxT(""), wxT("invalid radiobox index") );
 295
 296     return wxGetWindowText(m_radioButtons[item]);
 297 }
 298
 299 void wxRadioBox::SetLabel(int item, const wxString& label)
 300 {
 301     wxCHECK_RET( item >= 0 && item < m_noItems, wxT("invalid radiobox index") );
 302
 303     m_radioWidth[item] = m_radioHeight[item] = -1;
 304     SetWindowText((HWND)m_radioButtons[item], label.c_str());
 305 }
 306
 307 void wxRadioBox::SetLabel(int item, wxBitmap *bitmap)
 308 {
 309     /*
 310        m_radioWidth[item] = bitmap->GetWidth() + FB_MARGIN;
 311        m_radioHeight[item] = bitmap->GetHeight() + FB_MARGIN;
 312      */
 313     wxFAIL_MSG(wxT("not implemented"));
 314 }
 315
 316 int wxRadioBox::FindString(const wxString& s) const
 317 {
 318     for (int i = 0; i < m_noItems; i++)
 319     {
 320         if ( s == wxGetWindowText(m_radioButtons[i]) )
 321             return i;
 322     }
 323
 324     return wxNOT_FOUND;
 325 }
 326
 327 void wxRadioBox::SetSelection(int N)
 328 {
 329     wxCHECK_RET( (N >= 0) && (N < m_noItems), wxT("invalid radiobox index") );
 330
 331     // Following necessary for Win32s, because Win32s translate BM_SETCHECK
 332     if (m_selectedButton >= 0 && m_selectedButton < m_noItems)
 333         ::SendMessage((HWND) m_radioButtons[m_selectedButton], BM_SETCHECK, 0, 0L);
 334
 335     ::SendMessage((HWND)m_radioButtons[N], BM_SETCHECK, 1, 0L);
 336     ::SetFocus((HWND)m_radioButtons[N]);
 337
 338     m_selectedButton = N;
 339 }
 340
 341 // Get single selection, for single choice list items
 342 int wxRadioBox::GetSelection() const
 343 {
 344     return m_selectedButton;
 345 }
 346
 347 // Find string for position
 348 wxString wxRadioBox::GetString(int N) const
 349 {
 350     return wxGetWindowText(m_radioButtons[N]);
 351 }
 352
 353 // Restored old code.
 354 void wxRadioBox::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 355 {
 356     int currentX, currentY;
 357     GetPosition(&currentX, &currentY);
 358     int widthOld, heightOld;
 359     GetSize(&widthOld, &heightOld);
 360
 361     int xx = x;
 362     int yy = y;
 363
 364     if (x == -1 && !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 365         xx = currentX;
 366     if (y == -1 && !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 367         yy = currentY;
 368
 369 #if RADIOBTN_PARENT_IS_RADIOBOX
 370     int y_offset = 0;
 371     int x_offset = 0;
 372 #else
 373     int y_offset = yy;
 374     int x_offset = xx;
 375 #endif
 376
 377     int current_width, cyf;
 378
 379     int cx1,cy1;
 380     wxGetCharSize(m_hWnd, &cx1, &cy1, & GetFont());
 381
 382     // Attempt to have a look coherent with other platforms: We compute the
 383     // biggest toggle dim, then we align all items according this value.
 384     int maxWidth =  -1;
 385     int maxHeight = -1;
 386
 387     int i;
 388     for (i = 0 ; i < m_noItems; i++)
 389     {
 390         int eachWidth;
 391         int eachHeight;
 392         if (m_radioWidth[i]<0)
 393         {
 394             // It's a labelled toggle
 395             GetTextExtent(wxGetWindowText(m_radioButtons[i]),
 396                           &current_width, &cyf);
 397             eachWidth = (int)(current_width + RADIO_SIZE);
 398             eachHeight = (int)((3*cyf)/2);
 399         }
 400         else
 401         {
 402             eachWidth = m_radioWidth[i];
 403             eachHeight = m_radioHeight[i];
 404         }
 405
 406         if (maxWidth<eachWidth)
 407             maxWidth = eachWidth;
 408         if (maxHeight<eachHeight)
 409             maxHeight = eachHeight;
 410     }
 411
 412     if (m_hWnd)
 413     {
 414         int totWidth;
 415         int totHeight;
 416
 417         int nbHor = GetNumHor(),
 418             nbVer = GetNumVer();
 419
 420         // this formula works, but I don't know why.
 421         // Please, be sure what you do if you modify it!!
 422         if (m_radioWidth[0]<0)
 423             totHeight = (nbVer * maxHeight) + cy1/2;
 424         else
 425             totHeight = nbVer * (maxHeight+cy1/2);
 426         totWidth  = nbHor * (maxWidth+cx1);
 427
 428         int extraHeight = cy1;
 429
 430 #if defined(CTL3D) && !CTL3D
 431         // Requires a bigger group box in plain Windows
 432         extraHeight *= 3;
 433         extraHeight /= 2;
 434 #endif
 435
 436         // only change our width/height if asked for
 437         if ( width == -1 )
 438         {
 439             if ( sizeFlags & wxSIZE_AUTO_WIDTH )
 440                 width = totWidth + cx1;
 441             else
 442                 width = widthOld;
 443         }
 444
 445         if ( height == -1 )
 446         {
 447             if ( sizeFlags & wxSIZE_AUTO_HEIGHT )
 448                 height = totHeight + extraHeight;
 449             else
 450                 height = heightOld;
 451         }
 452
 453         ::MoveWindow(GetHwnd(), xx, yy, width, height, TRUE);
 454
 455         x_offset += cx1;
 456         y_offset += cy1;
 457     }
 458
 459 #if defined(CTL3D) && (!CTL3D)
 460     y_offset += (int)(cy1/2); // Fudge factor since buttons overlapped label
 461     // JACS 2/12/93. CTL3D draws group label quite high.
 462 #endif
 463     int startX = x_offset;
 464     int startY = y_offset;
 465
 466     for ( i = 0 ; i < m_noItems; i++)
 467     {
 468         // Bidimensional radio adjustment
 469         if (i&&((i%m_majorDim)==0)) // Why is this omitted for i = 0?
 470         {
 471             if (m_windowStyle & wxRA_VERTICAL)
 472             {
 473                 y_offset = startY;
 474                 x_offset += maxWidth + cx1;
 475             }
 476             else
 477             {
 478                 x_offset = startX;
 479                 y_offset += maxHeight;
 480                 if (m_radioWidth[0]>0)
 481                     y_offset += cy1/2;
 482             }
 483         }
 484         int eachWidth;
 485         int eachHeight;
 486         if (m_radioWidth[i]<0)
 487         {
 488             // It's a labeled item
 489             GetTextExtent(wxGetWindowText(m_radioButtons[i]),
 490                           &current_width, &cyf);
 491
 492             // How do we find out radio button bitmap size!!
 493             // By adjusting them carefully, manually :-)
 494             eachWidth = (int)(current_width + RADIO_SIZE);
 495             eachHeight = (int)((3*cyf)/2);
 496         }
 497         else
 498         {
 499             eachWidth = m_radioWidth[i];
 500             eachHeight = m_radioHeight[i];
 501         }
 502
 503         // VZ: make all buttons of the same, maximal size - like this they
 504         //     cover the radiobox entirely and the radiobox tooltips are always
 505         //     shown (otherwise they are not when the mouse pointer is in the
 506         //     radiobox part not belonging to any radiobutton)
 507         ::MoveWindow((HWND)m_radioButtons[i],
 508                      x_offset, y_offset, maxWidth, maxHeight,
 509                      TRUE);
 510
 511         if (m_windowStyle & wxRA_SPECIFY_ROWS)
 512         {
 513             y_offset += maxHeight;
 514             if (m_radioWidth[0]>0)
 515                 y_offset += cy1/2;
 516         }
 517         else
 518             x_offset += maxWidth + cx1;
 519     }
 520 }
 521
 522 void wxRadioBox::GetSize(int *width, int *height) const
 523 {
 524     RECT rect;
 525     rect.left = -1; rect.right = -1; rect.top = -1; rect.bottom = -1;
 526
 527     if (m_hWnd)
 528         wxFindMaxSize(m_hWnd, &rect);
 529
 530     int i;
 531     for (i = 0; i < m_noItems; i++)
 532         wxFindMaxSize(m_radioButtons[i], &rect);
 533
 534     *width = rect.right - rect.left;
 535     *height = rect.bottom - rect.top;
 536 }
 537
 538 void wxRadioBox::GetPosition(int *x, int *y) const
 539 {
 540     wxWindow *parent = GetParent();
 541     RECT rect = { -1, -1, -1, -1 };
 542
 543     int i;
 544     for (i = 0; i < m_noItems; i++)
 545         wxFindMaxSize(m_radioButtons[i], &rect);
 546
 547     if (m_hWnd)
 548         wxFindMaxSize(m_hWnd, &rect);
 549
 550     // Since we now have the absolute screen coords, if there's a parent we
 551     // must subtract its top left corner
 552     POINT point;
 553     point.x = rect.left;
 554     point.y = rect.top;
 555     if (parent)
 556     {
 557         ::ScreenToClient((HWND) parent->GetHWND(), &point);
 558     }
 559
 560     // We may be faking the client origin. So a window that's really at (0, 30)
 561     // may appear (to wxWin apps) to be at (0, 0).
 562     if (GetParent())
 563     {
 564         wxPoint pt(GetParent()->GetClientAreaOrigin());
 565         point.x -= pt.x;
 566         point.y -= pt.y;
 567     }
 568
 569     *x = point.x;
 570     *y = point.y;
 571 }
 572
 573 void wxRadioBox::SetFocus()
 574 {
 575     if (m_noItems > 0)
 576     {
 577         if (m_selectedButton == -1)
 578             ::SetFocus((HWND) m_radioButtons[0]);
 579         else
 580             ::SetFocus((HWND) m_radioButtons[m_selectedButton]);
 581     }
 582
 583 }
 584
 585 bool wxRadioBox::Show(bool show)
 586 {
 587     if ( !wxControl::Show(show) )
 588         return FALSE;
 589
 590     int nCmdShow = show ? SW_SHOW : SW_HIDE;
 591     for ( int i = 0; i < m_noItems; i++ )
 592     {
 593         ::ShowWindow((HWND)m_radioButtons[i], nCmdShow);
 594     }
 595
 596     return TRUE;
 597 }
 598
 599 // Enable a specific button
 600 void wxRadioBox::Enable(int item, bool enable)
 601 {
 602     wxCHECK_RET( item >= 0 && item < m_noItems,
 603                  wxT("invalid item in wxRadioBox::Enable()") );
 604
 605     ::EnableWindow((HWND) m_radioButtons[item], enable);
 606 }
 607
 608 // Enable all controls
 609 bool wxRadioBox::Enable(bool enable)
 610 {
 611     if ( !wxControl::Enable(enable) )
 612         return FALSE;
 613
 614     for (int i = 0; i < m_noItems; i++)
 615         ::EnableWindow((HWND) m_radioButtons[i], enable);
 616
 617     return TRUE;
 618 }
 619
 620 // Show a specific button
 621 void wxRadioBox::Show(int item, bool show)
 622 {
 623     wxCHECK_RET( item >= 0 && item < m_noItems,
 624                  wxT("invalid item in wxRadioBox::Show()") );
 625
 626     ::ShowWindow((HWND)m_radioButtons[item], show ? SW_SHOW : SW_HIDE);
 627 }
 628
 629 // For single selection items only
 630 wxString wxRadioBox::GetStringSelection() const
 631 {
 632     wxString result;
 633     int sel = GetSelection();
 634     if (sel > -1)
 635         result = GetString(sel);
 636
 637     return result;
 638 }
 639
 640 bool wxRadioBox::SetStringSelection(const wxString& s)
 641 {
 642     int sel = FindString (s);
 643     if (sel > -1)
 644     {
 645         SetSelection (sel);
 646         return TRUE;
 647     }
 648     else
 649         return FALSE;
 650 }
 651
 652 bool wxRadioBox::ContainsHWND(WXHWND hWnd) const
 653 {
 654     int i;
 655     for (i = 0; i < Number(); i++)
 656     {
 657         if (GetRadioButtons()[i] == hWnd)
 658             return TRUE;
 659     }
 660
 661     return FALSE;
 662 }
 663
 664 void wxRadioBox::Command(wxCommandEvent & event)
 665 {
 666     SetSelection (event.m_commandInt);
 667     ProcessCommand (event);
 668 }
 669
 670 void wxRadioBox::SubclassRadioButton(WXHWND hWndBtn)
 671 {
 672 #ifdef __WIN32__
 673     HWND hwndBtn = (HWND)hWndBtn;
 674
 675     if ( !s_wndprocRadioBtn )
 676         s_wndprocRadioBtn = (WXFARPROC)::GetWindowLong(hwndBtn, GWL_WNDPROC);
 677
 678     // No GWL_USERDATA in Win16, so omit this subclassing.
 679     ::SetWindowLong(hwndBtn, GWL_WNDPROC, (long)wxRadioBtnWndProc);
 680     ::SetWindowLong(hwndBtn, GWL_USERDATA, (long)this);
 681 #endif // __WIN32__
 682 }
 683
 684 void wxRadioBox::SendNotificationEvent()
 685 {
 686     wxCommandEvent event(wxEVT_COMMAND_RADIOBOX_SELECTED, m_windowId);
 687     event.SetInt( m_selectedButton );
 688     event.SetString( GetString(m_selectedButton) );
 689     event.SetEventObject( this );
 690     ProcessCommand(event);
 691 }
 692
 693 bool wxRadioBox::SetFont(const wxFont& font)
 694 {
 695     if ( !wxControl::SetFont(font) )
 696     {
 697         // nothing to do
 698         return FALSE;
 699     }
 700
 701     // also set the font of our radio buttons
 702     WXHFONT hfont = wxFont(font).GetResourceHandle();
 703     for ( int n = 0; n < m_noItems; n++ )
 704     {
 705         ::SendMessage((HWND)m_radioButtons[n], WM_SETFONT, (WPARAM)hfont, 0L);
 706     }
 707
 708     return TRUE;
 709 }
 710
 711 long wxRadioBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 712 {
 713     switch ( nMsg )
 714     {
 715         case WM_CTLCOLORSTATIC:
 716             // set the colour of the radio buttons to be the same as ours
 717             {
 718                 HDC hdc = (HDC)wParam;
 719
 720                 const wxColour& colBack = GetBackgroundColour();
 721                 ::SetBkColor(hdc, wxColourToRGB(colBack));
 722                 ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
 723
 724                 wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
 725
 726                 return (WXHBRUSH)brush->GetResourceHandle();
 727             }
 728
 729         // This is required for the radiobox to be sensitive to mouse input,
 730         // e.g. for Dialog Editor.
 731         case WM_NCHITTEST:
 732             {
 733                 int xPos = LOWORD(lParam);  // horizontal position of cursor
 734                 int yPos = HIWORD(lParam);  // vertical position of cursor
 735
 736                 ScreenToClient(&xPos, &yPos);
 737
 738                 // Make sure you can drag by the top of the groupbox, but let
 739                 // other (enclosed) controls get mouse events also
 740                 if (yPos < 10)
 741                     return (long)HTCLIENT;
 742             }
 743             // fall through
 744
 745         default:
 746             return wxControl::MSWWindowProc(nMsg, wParam, lParam);
 747     }
 748 }
 749
 750 // ---------------------------------------------------------------------------
 751 // window proc for radio buttons
 752 // ---------------------------------------------------------------------------
 753
 754 #ifdef __WIN32__
 755
 756 LRESULT APIENTRY _EXPORT wxRadioBtnWndProc(HWND hwnd,
 757                                            UINT msg,
 758                                            WPARAM wParam,
 759                                            LPARAM lParam)
 760 {
 761     bool processed = FALSE;
 762     if ( msg == WM_KEYDOWN
 763 #if wxUSE_TOOLTIPS
 764          || msg == WM_NOTIFY
 765 #endif // wxUSE_TOOLTIPS
 766        )
 767     {
 768         wxRadioBox *radiobox = (wxRadioBox *)::GetWindowLong(hwnd, GWL_USERDATA);
 769
 770         wxCHECK_MSG( radiobox, 0, wxT("radio button without radio box?") );
 771
 772 #if wxUSE_TOOLTIPS && !defined(__GNUWIN32__)
 773         if ( msg == WM_NOTIFY )
 774         {
 775             NMHDR* hdr = (NMHDR *)lParam;
 776             if ( (int)hdr->code == TTN_NEEDTEXT )
 777             {
 778                 wxToolTip *tt = radiobox->GetToolTip();
 779                 if ( tt )
 780                 {
 781                     TOOLTIPTEXT *ttt = (TOOLTIPTEXT *)lParam;
 782                     ttt->lpszText = (wxChar *)tt->GetTip().c_str();
 783
 784                     processed = TRUE;
 785                 }
 786             }
 787         }
 788         else // msg == WM_KEYDOWN
 789 #endif // wxUSE_TOOLTIPS
 790         {
 791             processed = TRUE;
 792
 793             int sel = radiobox->GetSelection();
 794
 795             switch ( wParam )
 796             {
 797                 case VK_UP:
 798                     sel--;
 799                     break;
 800
 801                 case VK_LEFT:
 802                     sel -= radiobox->GetNumVer();
 803                     break;
 804
 805                 case VK_DOWN:
 806                     sel++;
 807                     break;
 808
 809                 case VK_RIGHT:
 810                     sel += radiobox->GetNumVer();
 811                     break;
 812
 813                 case VK_TAB:
 814                     {
 815                         wxNavigationKeyEvent event;
 816                         event.SetDirection(!(::GetKeyState(VK_SHIFT) & 0x100));
 817                         event.SetWindowChange(FALSE);
 818                         event.SetEventObject(radiobox);
 819
 820                         if ( radiobox->GetEventHandler()->ProcessEvent(event) )
 821                             return 0;
 822                     }
 823                     // fall through
 824
 825                 default:
 826                     processed = FALSE;
 827             }
 828
 829             if ( processed )
 830             {
 831                 if ( sel >= 0 && sel < radiobox->Number() )
 832                 {
 833                     radiobox->SetSelection(sel);
 834
 835                     // emulate the button click
 836                     radiobox->SendNotificationEvent();
 837                 }
 838             }
 839         }
 840     }
 841
 842     if ( processed )
 843         return 0;
 844
 845     return ::CallWindowProc(CASTWNDPROC s_wndprocRadioBtn, hwnd, msg, wParam, lParam);
 846 }
 847
 848 #endif // __WIN32__
 849