added initial version of the Doxygen manual

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51901 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/doxygen/overviews/splitterwindow.h

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+/////////////////////////////////////////////////////////////////////////////
+// Name:        splitterwindow
+// Purpose:     topic overview
+// Author:      wxWidgets team
+// RCS-ID:      $Id$
+// Licence:     wxWindows license
+/////////////////////////////////////////////////////////////////////////////
+
+/*!
+ 
+ @page splitterwindow_overview wxSplitterWindow overview
+ 
+ Classes: #wxSplitterWindow
+ The following screenshot shows the appearance of a splitter window with a horizontal split.
+ 
+ The style wxSP_3D has been used to show a 3D border and 3D sash.
+ #Example
+ 
+ 
+ @section wxsplitterwindowexample Example
+ 
+ The following fragment shows how to create a splitter window, creating two
+ subwindows and hiding one of them.
+ 
+ 
+ @code
+ splitter = new wxSplitterWindow(this, -1, wxPoint(0, 0), wxSize(400, 400), wxSP_3D);
+ 
+   leftWindow = new MyWindow(splitter);
+   leftWindow-SetScrollbars(20, 20, 50, 50);
+ 
+   rightWindow = new MyWindow(splitter);
+   rightWindow-SetScrollbars(20, 20, 50, 50);
+   rightWindow-Show(@false);
+ 
+   splitter-Initialize(leftWindow);
+ 
+   // Set this to prevent unsplitting
+ //    splitter-SetMinimumPaneSize(20);
+ @endcode
+ 
+ 
+ The next fragment shows how the splitter window can be manipulated after creation.
+ 
+ 
+ @code
+ void MyFrame::OnSplitVertical(wxCommandEvent& event)
+   {
+         if ( splitter-IsSplit() )
+             splitter-Unsplit();
+         leftWindow-Show(@true);
+         rightWindow-Show(@true);
+         splitter-SplitVertically( leftWindow, rightWindow );
+   }
+ 
+   void MyFrame::OnSplitHorizontal(wxCommandEvent& event)
+   {
+         if ( splitter-IsSplit() )
+             splitter-Unsplit();
+         leftWindow-Show(@true);
+         rightWindow-Show(@true);
+         splitter-SplitHorizontally( leftWindow, rightWindow );
+   }
+ 
+   void MyFrame::OnUnsplit(wxCommandEvent& event)
+   {
+         if ( splitter-IsSplit() )
+             splitter-Unsplit();
+   }
+ @endcode
+ 
+ */
+ 
+