X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d1e418eaea09da4d74cc0d2b9d6bb1f9decbfa49..0d6ae333cdbbc27b042ca728e5c06ec569af0731:/src/msw/radiobox.cpp?ds=sidebyside

diff --git a/src/msw/radiobox.cpp b/src/msw/radiobox.cpp
index 26868c3ec0..a89956a5ca 100644
--- a/src/msw/radiobox.cpp
+++ b/src/msw/radiobox.cpp
@@ -1,6 +1,6 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        radiobox.cpp
-// Purpose:     wxRadioBox
+// Name:        msw/radiobox.cpp
+// Purpose:     wxRadioBox implementation
 // Author:      Julian Smart
 // Modified by:
 // Created:     04/01/98
@@ -32,30 +32,42 @@
     #include "wx/bitmap.h"
     #include "wx/brush.h"
     #include "wx/radiobox.h"
+    #include "wx/settings.h"
     #include "wx/log.h"
 #endif
 
 #include "wx/msw/private.h"
 
 #if wxUSE_TOOLTIPS
-
-#ifndef __GNUWIN32__
-    #include <commctrl.h>
-#endif
-
+    #ifndef __GNUWIN32_OLD__
+        #include <commctrl.h>
+    #endif
     #include "wx/tooltip.h"
 #endif // wxUSE_TOOLTIPS
 
 IMPLEMENT_DYNAMIC_CLASS(wxRadioBox, wxControl)
 
-// VZ: the new behaviour is to create the radio buttons as children of the
-//     radiobox instead of creating them as children of the radiobox' parent.
+// there are two possible ways to create the radio buttons: either as children
+// of the radiobox or as siblings of it - allow playing with both variants for
+// now, eventually we will choose the best one for our purposes
 //
-//     This seems more logical, more consistent with what other frameworks do
-//     and allows tooltips to work with radioboxes, so there should be no
-//     reason to revert to the backward compatible behaviour - but I still
-//     leave this possibility just in case.
-
+// two main problems are the keyboard navigation inside the radiobox (arrows
+// should switch between buttons, not pass focus to the next control) and the
+// tooltips - a tooltip is associated with the radiobox itself, not the
+// children...
+//
+// the problems with setting this to 1:
+// a) Alt-<mnemonic of radiobox> isn't handled properly by IsDialogMessage()
+//    because it sets focus to the next control accepting it which is not a
+//    radio button but a radiobox sibling in this case - the only solution to
+//    this would be to handle Alt-<mnemonic> ourselves
+// b) the problems with setting radiobox colours under Win98/2K were reported
+//    but I couldn't reproduce it so I have no idea about what causes it
+//
+// the problems with setting this to 0:
+// a) the tooltips are not shown for the radiobox - possible solution: make
+//    TTM_WINDOWFROMPOS handling code in msw/tooltip.cpp work (easier said than
+//    done because I don't know why it doesn't work)
 #define RADIOBTN_PARENT_IS_RADIOBOX 0
 
 // ---------------------------------------------------------------------------
@@ -86,6 +98,7 @@ static WXFARPROC s_wndprocRadioBtn = (WXFARPROC)NULL;
 // wxRadioBox
 // ---------------------------------------------------------------------------
 
+// returns the number of rows
 int wxRadioBox::GetNumVer() const
 {
     if ( m_windowStyle & wxRA_SPECIFY_ROWS )
@@ -98,6 +111,7 @@ int wxRadioBox::GetNumVer() const
     }
 }
 
+// returns the number of columns
 int wxRadioBox::GetNumHor() const
 {
     if ( m_windowStyle & wxRA_SPECIFY_ROWS )
@@ -114,6 +128,9 @@ bool wxRadioBox::MSWCommand(WXUINT cmd, WXWORD id)
 {
     if ( cmd == BN_CLICKED )
     {
+        if (id == GetId())
+            return TRUE;
+
         int selectedButton = -1;
 
         for ( int i = 0; i < m_noItems; i++ )
@@ -126,7 +143,14 @@ bool wxRadioBox::MSWCommand(WXUINT cmd, WXWORD id)
             }
         }
 
-        wxASSERT_MSG( selectedButton != -1, wxT("click from alien button?") );
+        if ( selectedButton == -1 )
+        {
+            // just ignore it - due to a hack with WM_NCHITTEST handling in our
+            // wnd proc, we can receive dummy click messages when we click near
+            // the radiobox edge (this is ugly but Julian wouldn't let me get
+            // rid of this...)
+            return FALSE;
+        }
 
         if ( selectedButton != m_selectedButton )
         {
@@ -156,7 +180,7 @@ wxRadioBox::wxRadioBox(wxWindow *parent, wxFunction func, const char *title,
     delete choices2;
 }
 
-#endif
+#endif // WXWIN_COMPATIBILITY
 
 // Radio box item
 wxRadioBox::wxRadioBox()
@@ -186,7 +210,7 @@ bool wxRadioBox::Create(wxWindow *parent,
     m_selectedButton = -1;
     m_noItems = 0;
 
-    m_majorDim =  majorDim == 0 ? n : majorDim;
+    m_majorDim = majorDim == 0 ? n : majorDim;
     m_noRowsOrCols = majorDim;
 
     // common initialization
@@ -194,7 +218,8 @@ bool wxRadioBox::Create(wxWindow *parent,
         return FALSE;
 
     // create the static box
-    if ( !MSWCreateControl(wxT("BUTTON"), BS_GROUPBOX, pos, size, title, 0) )
+    if ( !MSWCreateControl(wxT("BUTTON"), BS_GROUPBOX | WS_GROUP,
+                           pos, size, title, 0) )
         return FALSE;
 
     // and now create the buttons
@@ -239,7 +264,7 @@ bool wxRadioBox::Create(wxWindow *parent,
 
         if ( !hwndBtn )
         {
-            wxLogLastError("CreateWindow(radio btn)");
+            wxLogLastError(wxT("CreateWindow(radio btn)"));
 
             return FALSE;
         }
@@ -304,7 +329,7 @@ void wxRadioBox::SetLabel(int item, const wxString& label)
     SetWindowText((HWND)m_radioButtons[item], label.c_str());
 }
 
-void wxRadioBox::SetLabel(int item, wxBitmap *bitmap)
+void wxRadioBox::SetLabel(int WXUNUSED(item), wxBitmap *WXUNUSED(bitmap))
 {
     /*
        m_radioWidth[item] = bitmap->GetWidth() + FB_MARGIN;
@@ -350,6 +375,75 @@ wxString wxRadioBox::GetString(int N) const
     return wxGetWindowText(m_radioButtons[N]);
 }
 
+// ----------------------------------------------------------------------------
+// size calculations
+// ----------------------------------------------------------------------------
+
+wxSize wxRadioBox::GetMaxButtonSize() const
+{
+    // calculate the max button size
+    int widthMax = 0,
+        heightMax = 0;
+    for ( int i = 0 ; i < m_noItems; i++ )
+    {
+        int width, height;
+        if ( m_radioWidth[i] < 0 )
+        {
+            GetTextExtent(wxGetWindowText(m_radioButtons[i]), &width, &height);
+
+            // adjust the size to take into account the radio box itself
+            // FIXME this is totally bogus!
+            width += RADIO_SIZE;
+            height *= 3;
+            height /= 2;
+        }
+        else
+        {
+            width = m_radioWidth[i];
+            height = m_radioHeight[i];
+        }
+
+        if ( widthMax < width )
+            widthMax = width;
+        if ( heightMax < height )
+            heightMax = height;
+    }
+
+    return wxSize(widthMax, heightMax);
+}
+
+wxSize wxRadioBox::GetTotalButtonSize(const wxSize& sizeBtn) const
+{
+    // the radiobox should be big enough for its buttons
+    int cx1, cy1;
+    wxGetCharSize(m_hWnd, &cx1, &cy1, &GetFont());
+
+    int extraHeight = cy1;
+
+#if defined(CTL3D) && !CTL3D
+    // Requires a bigger group box in plain Windows
+    extraHeight *= 3;
+    extraHeight /= 2;
+#endif
+
+    int height = GetNumVer() * sizeBtn.y + cy1/2 + extraHeight;
+    int width  = GetNumHor() * (sizeBtn.x + cx1) + cx1;
+
+    // and also wide enough for its label
+    int widthLabel;
+    GetTextExtent(GetTitle(), &widthLabel, NULL);
+    widthLabel += RADIO_SIZE; // FIXME this is bogus too
+    if ( widthLabel > width )
+        width = widthLabel;
+
+    return wxSize(width, height);
+}
+
+wxSize wxRadioBox::DoGetBestSize() const
+{
+    return GetTotalButtonSize(GetMaxButtonSize());
+}
+
 // Restored old code.
 void wxRadioBox::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 {
@@ -374,106 +468,89 @@ void wxRadioBox::DoSetSize(int x, int y, int width, int height, int sizeFlags)
     int x_offset = xx;
 #endif
 
-    int current_width, cyf;
-
-    int cx1,cy1;
+    int cx1, cy1;
     wxGetCharSize(m_hWnd, &cx1, &cy1, & GetFont());
 
     // Attempt to have a look coherent with other platforms: We compute the
     // biggest toggle dim, then we align all items according this value.
-    int maxWidth =  -1;
-    int maxHeight = -1;
+    wxSize maxSize = GetMaxButtonSize();
+    int maxWidth = maxSize.x,
+        maxHeight = maxSize.y;
 
-    int i;
-    for (i = 0 ; i < m_noItems; i++)
+    wxSize totSize = GetTotalButtonSize(maxSize);
+    int totWidth = totSize.x,
+        totHeight = totSize.y;
+
+    // only change our width/height if asked for
+    if ( width == -1 )
     {
-        int eachWidth;
-        int eachHeight;
-        if (m_radioWidth[i]<0)
-        {
-            // It's a labelled toggle
-            GetTextExtent(wxGetWindowText(m_radioButtons[i]),
-                          &current_width, &cyf);
-            eachWidth = (int)(current_width + RADIO_SIZE);
-            eachHeight = (int)((3*cyf)/2);
-        }
+        if ( sizeFlags & wxSIZE_AUTO_WIDTH )
+            width = totWidth;
         else
-        {
-            eachWidth = m_radioWidth[i];
-            eachHeight = m_radioHeight[i];
-        }
-
-        if (maxWidth<eachWidth)
-            maxWidth = eachWidth;
-        if (maxHeight<eachHeight)
-            maxHeight = eachHeight;
+            width = widthOld;
     }
 
-    if (m_hWnd)
+    if ( height == -1 )
     {
-        int totWidth;
-        int totHeight;
-
-        int nbHor = GetNumHor(),
-            nbVer = GetNumVer();
-
-        // this formula works, but I don't know why.
-        // Please, be sure what you do if you modify it!!
-        if (m_radioWidth[0]<0)
-            totHeight = (nbVer * maxHeight) + cy1/2;
+        if ( sizeFlags & wxSIZE_AUTO_HEIGHT )
+            height = totHeight;
         else
-            totHeight = nbVer * (maxHeight+cy1/2);
-        totWidth  = nbHor * (maxWidth+cx1);
-
-        int extraHeight = cy1;
-
-#if defined(CTL3D) && !CTL3D
-        // Requires a bigger group box in plain Windows
-        extraHeight *= 3;
-        extraHeight /= 2;
-#endif
+            height = heightOld;
+    }
 
-        // only change our width/height if asked for
-        if ( width == -1 )
-        {
-            if ( sizeFlags & wxSIZE_AUTO_WIDTH )
-                width = totWidth + cx1;
-            else
-                width = widthOld;
-        }
+    ::MoveWindow(GetHwnd(), xx, yy, width, height, TRUE);
 
-        if ( height == -1 )
-        {
-            if ( sizeFlags & wxSIZE_AUTO_HEIGHT )
-                height = totHeight + extraHeight;
-            else
-                height = heightOld;
-        }
+    // Now position all the buttons: the current button will be put at
+    // wxPoint(x_offset, y_offset) and the new row/column will start at
+    // startX/startY. The size of all buttons will be the same wxSize(maxWidth,
+    // maxHeight) except for the buttons in the last column which should extend
+    // to the right border of radiobox and thus can be wider than this.
 
-        ::MoveWindow(GetHwnd(), xx, yy, width, height, TRUE);
+    // Also, remember that wxRA_SPECIFY_COLS means that we arrange buttons in
+    // left to right order and m_majorDim is the number of columns while
+    // wxRA_SPECIFY_ROWS means that the buttons are arranged top to bottom and
+    // m_majorDim is the number of rows.
 
-        x_offset += cx1;
-        y_offset += cy1;
-    }
+    x_offset += cx1;
+    y_offset += cy1;
 
 #if defined(CTL3D) && (!CTL3D)
     y_offset += (int)(cy1/2); // Fudge factor since buttons overlapped label
     // JACS 2/12/93. CTL3D draws group label quite high.
 #endif
+
     int startX = x_offset;
     int startY = y_offset;
 
-    for ( i = 0 ; i < m_noItems; i++)
+    for ( int i = 0; i < m_noItems; i++ )
     {
-        // Bidimensional radio adjustment
-        if (i&&((i%m_majorDim)==0)) // Why is this omitted for i = 0?
+        // the last button in the row may be wider than the other ones as the
+        // radiobox may be wider than the sum of the button widths (as it
+        // happens, for example, when the radiobox label is very long)
+        bool isLastInTheRow;
+        if ( m_windowStyle & wxRA_SPECIFY_COLS )
+        {
+            // item is the last in its row if it is a multiple of the number of
+            // columns or if it is just the last item
+            int n = i + 1;
+            isLastInTheRow = ((n % m_majorDim) == 0) || (n == m_noItems);
+        }
+        else // wxRA_SPECIFY_ROWS
         {
-            if (m_windowStyle & wxRA_VERTICAL)
+            // item is the last in the row if it is in the last columns
+            isLastInTheRow = i >= (m_noItems/m_majorDim)*m_majorDim;
+        }
+
+        // is this the start of new row/column?
+        if ( i && (i % m_majorDim == 0) )
+        {
+            if ( m_windowStyle & wxRA_SPECIFY_ROWS )
             {
+                // start of new column
                 y_offset = startY;
                 x_offset += maxWidth + cx1;
             }
-            else
+            else // start of new row
             {
                 x_offset = startX;
                 y_offset += maxHeight;
@@ -481,23 +558,19 @@ void wxRadioBox::DoSetSize(int x, int y, int width, int height, int sizeFlags)
                     y_offset += cy1/2;
             }
         }
-        int eachWidth;
-        int eachHeight;
-        if (m_radioWidth[i]<0)
+
+        int widthBtn;
+        if ( isLastInTheRow )
         {
-            // It's a labeled item
-            GetTextExtent(wxGetWindowText(m_radioButtons[i]),
-                          &current_width, &cyf);
-
-            // How do we find out radio button bitmap size!!
-            // By adjusting them carefully, manually :-)
-            eachWidth = (int)(current_width + RADIO_SIZE);
-            eachHeight = (int)((3*cyf)/2);
+            // make the button go to the end of radio box
+            widthBtn = startX + width - x_offset - 2*cx1;
+            if ( widthBtn < maxWidth )
+                widthBtn = maxWidth;
         }
         else
         {
-            eachWidth = m_radioWidth[i];
-            eachHeight = m_radioHeight[i];
+            // normal button, always of the same size
+            widthBtn = maxWidth;
         }
 
         // VZ: make all buttons of the same, maximal size - like this they
@@ -505,17 +578,22 @@ void wxRadioBox::DoSetSize(int x, int y, int width, int height, int sizeFlags)
         //     shown (otherwise they are not when the mouse pointer is in the
         //     radiobox part not belonging to any radiobutton)
         ::MoveWindow((HWND)m_radioButtons[i],
-                     x_offset, y_offset, maxWidth, maxHeight,
+                     x_offset, y_offset, widthBtn, maxHeight,
                      TRUE);
 
-        if (m_windowStyle & wxRA_SPECIFY_ROWS)
+        // where do we put the next button?
+        if ( m_windowStyle & wxRA_SPECIFY_ROWS )
         {
+            // below this one
             y_offset += maxHeight;
             if (m_radioWidth[0]>0)
                 y_offset += cy1/2;
         }
         else
-            x_offset += maxWidth + cx1;
+        {
+            // to the right of this one
+            x_offset += widthBtn + cx1;
+        }
     }
 }
 
@@ -667,15 +745,17 @@ void wxRadioBox::Command(wxCommandEvent & event)
     ProcessCommand (event);
 }
 
+// NB: if this code is changed, wxGetWindowForHWND() which relies on having the
+//     radiobox pointer in GWL_USERDATA for radio buttons must be updated too!
 void wxRadioBox::SubclassRadioButton(WXHWND hWndBtn)
 {
+    // No GWL_USERDATA in Win16, so omit this subclassing.
 #ifdef __WIN32__
     HWND hwndBtn = (HWND)hWndBtn;
 
     if ( !s_wndprocRadioBtn )
         s_wndprocRadioBtn = (WXFARPROC)::GetWindowLong(hwndBtn, GWL_WNDPROC);
 
-    // No GWL_USERDATA in Win16, so omit this subclassing.
     ::SetWindowLong(hwndBtn, GWL_WNDPROC, (long)wxRadioBtnWndProc);
     ::SetWindowLong(hwndBtn, GWL_USERDATA, (long)this);
 #endif // __WIN32__
@@ -702,16 +782,25 @@ bool wxRadioBox::SetFont(const wxFont& font)
     WXHFONT hfont = wxFont(font).GetResourceHandle();
     for ( int n = 0; n < m_noItems; n++ )
     {
-        ::SendMessage((HWND)m_radioButtons[n], WM_SETFONT, (WPARAM)hfont, 0L);
+        HWND hwndBtn = (HWND)m_radioButtons[n];
+        ::SendMessage(hwndBtn, WM_SETFONT, (WPARAM)hfont, 0L);
+
+        // otherwise the buttons are not redrawn correctly
+        ::InvalidateRect(hwndBtn, NULL, FALSE /* don't erase bg */);
     }
 
     return TRUE;
 }
 
+// ----------------------------------------------------------------------------
+// our window proc
+// ----------------------------------------------------------------------------
+
 long wxRadioBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 {
     switch ( nMsg )
     {
+#ifdef __WIN32__
         case WM_CTLCOLORSTATIC:
             // set the colour of the radio buttons to be the same as ours
             {
@@ -725,6 +814,7 @@ long wxRadioBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 
                 return (WXHBRUSH)brush->GetResourceHandle();
             }
+#endif // Win32
 
         // This is required for the radiobox to be sensitive to mouse input,
         // e.g. for Dialog Editor.
@@ -740,13 +830,52 @@ long wxRadioBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                 if (yPos < 10)
                     return (long)HTCLIENT;
             }
-            // fall through
+            break;
+    }
 
-        default:
-            return wxControl::MSWWindowProc(nMsg, wParam, lParam);
+    return wxControl::MSWWindowProc(nMsg, wParam, lParam);
+}
+
+WXHBRUSH wxRadioBox::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
+#if wxUSE_CTL3D
+                               WXUINT message,
+                               WXWPARAM wParam,
+                               WXLPARAM lParam
+#else
+                               WXUINT WXUNUSED(message),
+                               WXWPARAM WXUNUSED(wParam),
+                               WXLPARAM WXUNUSED(lParam)
+#endif
+    )
+{
+#if wxUSE_CTL3D
+    if ( m_useCtl3D )
+    {
+        HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
+        return (WXHBRUSH) hbrush;
     }
+#endif // wxUSE_CTL3D
+
+    HDC hdc = (HDC)pDC;
+    if (GetParent()->GetTransparentBackground())
+        SetBkMode(hdc, TRANSPARENT);
+    else
+        SetBkMode(hdc, OPAQUE);
+
+    wxColour colBack = GetBackgroundColour();
+
+    if (!IsEnabled())
+        colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
+
+    ::SetBkColor(hdc, wxColourToRGB(colBack));
+    ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
+
+    wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
+
+    return (WXHBRUSH)brush->GetResourceHandle();
 }
 
+
 // ---------------------------------------------------------------------------
 // window proc for radio buttons
 // ---------------------------------------------------------------------------
@@ -754,95 +883,201 @@ long wxRadioBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 #ifdef __WIN32__
 
 LRESULT APIENTRY _EXPORT wxRadioBtnWndProc(HWND hwnd,
-                                           UINT msg,
+                                           UINT message,
                                            WPARAM wParam,
                                            LPARAM lParam)
 {
-    bool processed = FALSE;
-    if ( msg == WM_KEYDOWN
-#if wxUSE_TOOLTIPS
-         || msg == WM_NOTIFY
-#endif // wxUSE_TOOLTIPS
-       )
+    switch ( message )
     {
-        wxRadioBox *radiobox = (wxRadioBox *)::GetWindowLong(hwnd, GWL_USERDATA);
+        case WM_GETDLGCODE:
+            // we must tell IsDialogMessage()/our kbd processing code that we
+            // want to process arrows ourselves because neither of them is
+            // smart enough to handle arrows properly for us
+            {
+                long lDlgCode = ::CallWindowProc(CASTWNDPROC s_wndprocRadioBtn, hwnd,
+                                                 message, wParam, lParam);
 
-        wxCHECK_MSG( radiobox, 0, wxT("radio button without radio box?") );
+                return lDlgCode | DLGC_WANTARROWS;
+            }
 
-#if wxUSE_TOOLTIPS && !defined(__GNUWIN32__)
-        if ( msg == WM_NOTIFY )
-        {
-            NMHDR* hdr = (NMHDR *)lParam;
-            if ( (int)hdr->code == TTN_NEEDTEXT )
+#if wxUSE_TOOLTIPS
+        case WM_NOTIFY:
             {
-                wxToolTip *tt = radiobox->GetToolTip();
-                if ( tt )
+                NMHDR* hdr = (NMHDR *)lParam;
+                if ( (int)hdr->code == TTN_NEEDTEXT )
                 {
-                    TOOLTIPTEXT *ttt = (TOOLTIPTEXT *)lParam;
-                    ttt->lpszText = (wxChar *)tt->GetTip().c_str();
+                    wxRadioBox *radiobox = (wxRadioBox *)
+                        ::GetWindowLong(hwnd, GWL_USERDATA);
+
+                    wxCHECK_MSG( radiobox, 0,
+                                 wxT("radio button without radio box?") );
+
+                    wxToolTip *tooltip = radiobox->GetToolTip();
+                    if ( tooltip )
+                    {
+                        TOOLTIPTEXT *ttt = (TOOLTIPTEXT *)lParam;
+                        ttt->lpszText = (wxChar *)tooltip->GetTip().c_str();
+                    }
 
-                    processed = TRUE;
+                    // processed
+                    return 0;
                 }
             }
-        }
-        else // msg == WM_KEYDOWN
+            break;
 #endif // wxUSE_TOOLTIPS
-        {
-            processed = TRUE;
-
-            int sel = radiobox->GetSelection();
 
-            switch ( wParam )
+        case WM_KEYDOWN:
             {
-                case VK_UP:
-                    sel--;
-                    break;
+                wxRadioBox *radiobox = (wxRadioBox *)
+                    ::GetWindowLong(hwnd, GWL_USERDATA);
 
-                case VK_LEFT:
-                    sel -= radiobox->GetNumVer();
-                    break;
+                wxCHECK_MSG( radiobox, 0, wxT("radio button without radio box?") );
 
-                case VK_DOWN:
-                    sel++;
-                    break;
+                bool processed = TRUE;
 
-                case VK_RIGHT:
-                    sel += radiobox->GetNumVer();
-                    break;
+                bool horz = (radiobox->GetWindowStyle() & wxRA_SPECIFY_COLS) != 0;
+                int num = radiobox->Number(),
+                    rows = radiobox->GetNumVer(),
+                    cols = radiobox->GetNumHor();
 
-                case VK_TAB:
+                int selOld = radiobox->GetSelection();
+                int selNew = selOld;
+
+                // wrapping will be handled below for the cases when we
+                // add/substract more than 1 but here otherwise as it's simpler
+                switch ( wParam )
+                {
+                    case VK_UP:
+                        if ( horz )
+                            selNew -= cols;
+                        else
+                        {
+                            if ( selNew )
+                                selNew--;
+                            else
+                                selNew = num - 1;
+                        }
+                        break;
+
+                    case VK_LEFT:
+                        if ( horz )
+                        {
+                            if ( selNew )
+                                selNew--;
+                            else
+                                selNew = num - 1;
+                        }
+                        else
+                            selNew -= rows;
+                        break;
+
+                    case VK_DOWN:
+                        if ( horz )
+                            selNew += cols;
+                        else
+                        {
+                            if ( ++selNew == num )
+                                selNew = 0;
+                        }
+                        break;
+
+                    case VK_RIGHT:
+                        if ( horz )
+                        {
+                            if ( ++selNew == num )
+                                selNew = 0;
+                        }
+                        else
+                            selNew += rows;
+                        break;
+
+                    default:
+                        processed = FALSE;
+                }
+
+                if ( processed )
+                {
+                    // ensure that selNew is in range [0..num)
+                    if ( selNew >= num )
                     {
-                        wxNavigationKeyEvent event;
-                        event.SetDirection(!(::GetKeyState(VK_SHIFT) & 0x100));
-                        event.SetWindowChange(FALSE);
-                        event.SetEventObject(radiobox);
+                        selNew -= num;
 
-                        if ( radiobox->GetEventHandler()->ProcessEvent(event) )
-                            return 0;
+                        int dim = horz ? cols : rows;
+                        selNew += dim - 1;
+                        selNew %= dim;
+                    }
+                    else if ( selNew < 0 )
+                    {
+                        selNew += num;
+
+                        int dim = horz ? cols : rows;
+                        if ( selNew % dim == 0 )
+                        {
+                            selNew -= dim - 1;
+                        }
+                        else
+                        {
+                            selNew++;
+                        }
                     }
-                    // fall through
 
-                default:
-                    processed = FALSE;
+                    if ( selNew != selOld )
+                    {
+                        radiobox->SetSelection(selNew);
+
+                        // emulate the button click
+                        radiobox->SendNotificationEvent();
+
+                        return 0;
+                    }
+                }
             }
+            break;
+
+#ifdef __WIN32__
+        case WM_HELP:
+        {
+            wxRadioBox *radiobox = (wxRadioBox *)
+                    ::GetWindowLong(hwnd, GWL_USERDATA);
+
+            wxCHECK_MSG( radiobox, 0, wxT("radio button without radio box?") );
 
-            if ( processed )
+            bool processed = TRUE;
+
+            HELPINFO* info = (HELPINFO*) lParam;
+            // Don't yet process menu help events, just windows
+            if (info->iContextType == HELPINFO_WINDOW)
             {
-                if ( sel >= 0 && sel < radiobox->Number() )
+                wxWindow* subjectOfHelp = radiobox;
+                bool eventProcessed = FALSE;
+                while (subjectOfHelp && !eventProcessed)
                 {
-                    radiobox->SetSelection(sel);
+                    wxHelpEvent helpEvent(wxEVT_HELP, subjectOfHelp->GetId(), wxPoint(info->MousePos.x, info->MousePos.y) ) ; // info->iCtrlId);
+                    helpEvent.SetEventObject(radiobox);
+                    eventProcessed = radiobox->GetEventHandler()->ProcessEvent(helpEvent);
 
-                    // emulate the button click
-                    radiobox->SendNotificationEvent();
+                    // Go up the window hierarchy until the event is handled (or not)
+                    subjectOfHelp = subjectOfHelp->GetParent();
                 }
+                processed = eventProcessed;
+            }
+            else if (info->iContextType == HELPINFO_MENUITEM)
+            {
+                wxHelpEvent helpEvent(wxEVT_HELP, info->iCtrlId) ;
+                helpEvent.SetEventObject(radiobox);
+                processed = radiobox->GetEventHandler()->ProcessEvent(helpEvent);
             }
+            else processed = FALSE;
+
+            if (processed)
+                return 0;
+
+            break;
         }
+#endif
     }
 
-    if ( processed )
-        return 0;
-
-    return ::CallWindowProc(CASTWNDPROC s_wndprocRadioBtn, hwnd, msg, wParam, lParam);
+    return ::CallWindowProc(CASTWNDPROC s_wndprocRadioBtn, hwnd, message, wParam, lParam);
 }
 
 #endif // __WIN32__