+ // Helper function to be called from derived classes Create()
+ // implementations: it checks that the style doesn't contain any
+ // incompatible bits and modifies it to be sane if it does.
+ static void WXValidateStyle(long *stylePtr)
+ {
+ long& style = *stylePtr;
+
+ if ( !(style & (wxCHK_2STATE | wxCHK_3STATE)) )
+ {
+ // For compatibility we use absence of style flags as wxCHK_2STATE
+ // because wxCHK_2STATE used to have the value of 0 and some
+ // existing code uses 0 instead of it. Moreover, some code even
+ // uses some non-0 style, e.g. wxBORDER_XXX, but doesn't specify
+ // neither wxCHK_2STATE nor wxCHK_3STATE -- to avoid breaking it,
+ // assume (much more common) 2 state checkbox by default.
+ style |= wxCHK_2STATE;
+ }
+
+ if ( style & wxCHK_3STATE )
+ {
+ if ( style & wxCHK_2STATE )
+ {
+ wxFAIL_MSG( "wxCHK_2STATE and wxCHK_3STATE can't be used "
+ "together" );
+ style &= ~wxCHK_3STATE;
+ }
+ }
+ else // No wxCHK_3STATE
+ {
+ if ( style & wxCHK_ALLOW_3RD_STATE_FOR_USER )
+ {
+ wxFAIL_MSG( "wxCHK_ALLOW_3RD_STATE_FOR_USER doesn't make sense "
+ "without wxCHK_3STATE" );
+ style &= ~wxCHK_ALLOW_3RD_STATE_FOR_USER;
+ }
+ }
+ }
+