[USER32] Add support for navigating a group of radio buttons using a keyboard.

Import Wine commit:
https://source.winehq.org/git/wine.git/commit/b1b8fb77be5dd9a8754b04b2ef9f703bbe393d59

"user32: Add support for navigating a group of radio buttons using a keyboard.
The patch approximates the behaviour observed in the message tests
but still doesn't make the message tests pass without failures.
"
by Dmitry Timoshkov.
See bug report https://bugs.winehq.org/show_bug.cgi?id=16845

diff --git a/win32ss/user/user32/windows/dialog.c b/win32ss/user/user32/windows/dialog.c
index 0fc31a7..4770169 100644 (file)
--- a/win32ss/user/user32/windows/dialog.c
+++ b/win32ss/user/user32/windows/dialog.c
@@ -2556,8 +2556,16 @@ IsDialogMessageW(
              if (!(dlgCode & DLGC_WANTARROWS))
              {
                  BOOL fPrevious = (lpMsg->wParam == VK_LEFT || lpMsg->wParam == VK_UP);
-                 HWND hwndNext = GetNextDlgGroupItem (hDlg, GetFocus(), fPrevious );
-                 SendMessageW( hDlg, WM_NEXTDLGCTL, (WPARAM)hwndNext, 1 );
+                 HWND hwndNext = GetNextDlgGroupItem( hDlg, lpMsg->hwnd, fPrevious );
+                 if (hwndNext && SendMessageW( hwndNext, WM_GETDLGCODE, lpMsg->wParam, (LPARAM)lpMsg ) == (DLGC_BUTTON | DLGC_RADIOBUTTON))
+                 {
+                     SetFocus( hwndNext );
+                     if ((GetWindowLongW( hwndNext, GWL_STYLE ) & BS_TYPEMASK) == BS_AUTORADIOBUTTON &&
+                         SendMessageW( hwndNext, BM_GETCHECK, 0, 0 ) != BST_CHECKED)
+                         SendMessageW( hwndNext, BM_CLICK, 1, 0 );
+                 }
+                 else
+                     SendMessageW( hDlg, WM_NEXTDLGCTL, (WPARAM)hwndNext, 1 );
                  return TRUE;
              }
              break;