+///////////////////////////////////////////////////////////////////////////////
+// Name: src/common/radiocmn.cpp
+// Purpose: wxRadioBox methods common to all ports
+// Author: Vadim Zeitlin
+// Modified by:
+// Created: 03.06.01
+// RCS-ID: $Id$
+// Copyright: (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
+// License: wxWindows license
+///////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#ifdef __GNUG__
+ #pragma implementation "radioboxbase.h"
+#endif
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+ #pragma hdrstop
+#endif
+
+#if wxUSE_RADIOBOX
+
+#ifndef WX_PRECOMP
+ #include "wx/radiobox.h"
+#endif //WX_PRECOMP
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+int wxRadioBoxBase::GetNextItem(int item, wxDirection dir, long style) const
+{
+ int count = GetCount(),
+ numCols = GetColumnCount(),
+ numRows = GetRowCount();
+
+ bool horz = (style & wxRA_SPECIFY_COLS) != 0;
+
+ switch ( dir )
+ {
+ case wxUP:
+ if ( horz )
+ {
+ item -= numCols;
+ }
+ else // vertical layout
+ {
+ if ( !item-- )
+ item = count - 1;
+ }
+ break;
+
+ case wxLEFT:
+ if ( horz )
+ {
+ if ( !item-- )
+ item = count - 1;
+ }
+ else // vertical layout
+ {
+ item -= numRows;
+ }
+ break;
+
+ case wxDOWN:
+ if ( horz )
+ {
+ item += numCols;
+ }
+ else // vertical layout
+ {
+ if ( ++item == count )
+ item = 0;
+ }
+ break;
+
+ case wxRIGHT:
+ if ( horz )
+ {
+ if ( ++item == count )
+ item = 0;
+ }
+ else // vertical layout
+ {
+ item += numRows;
+ }
+ break;
+
+ default:
+ wxFAIL_MSG( _T("unexpected wxDirection value") );
+ return -1;
+ }
+
+ // ensure that the item is in range [0..count)
+ if ( item < 0 )
+ {
+ // first map the item to the one in the same column but in the last row
+ item += count;
+
+ // now there are 2 cases: either it is the first item of the last row
+ // in which case we need to wrap again and get to the last item or we
+ // can just go to the previous item
+ if ( item % (horz ? numCols : numRows) )
+ item--;
+ else
+ item = count - 1;
+ }
+ else if ( item >= count )
+ {
+ // same logic as above
+ item -= count;
+
+ // ... except that we need to check if this is not the last item, not
+ // the first one
+ if ( (item + 1) % (horz ? numCols : numRows) )
+ item++;
+ else
+ item = 0;
+ }
+
+ wxASSERT_MSG( item < count && item >= 0,
+ _T("logic error in wxRadioBox::GetNextItem()") );
+
+ return item;
+}
+
+#endif // wxUSE_RADIOBOX
+
projects / wxWidgets.git / commitdiff
