Move wxTopLevelWindow::SetShape() down to wxNonOwnedWindow.

Also add wxNonOwnedWindow for wxMSW (which previously simply typedef'd it to
wxWindow) and document this class now that it provides some user-visible
functionality.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69364 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/nonownedwnd.cpp

@@ -0,0 +1,81 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        src/msw/nonownedwnd.cpp
+// Purpose:     wxNonOwnedWindow implementation for MSW.
+// Author:      Vadim Zeitlin
+// Created:     2011-10-09 (extracted from src/msw/toplevel.cpp)
+// RCS-ID:      $Id: $
+// Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// for compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+#endif // WX_PRECOMP
+
+#include "wx/nonownedwnd.h"
+
+// ============================================================================
+// wxNonOwnedWindow implementation
+// ============================================================================
+
+#ifndef __WXWINCE__
+
+bool wxNonOwnedWindow::SetShape(const wxRegion& region)
+{
+    wxCHECK_MSG( HasFlag(wxFRAME_SHAPED), false,
+                 wxT("Shaped windows must be created with the wxFRAME_SHAPED style."));
+
+    // The empty region signifies that the shape should be removed from the
+    // window.
+    if ( region.IsEmpty() )
+    {
+        if (::SetWindowRgn(GetHwnd(), NULL, TRUE) == 0)
+        {
+            wxLogLastError(wxT("SetWindowRgn"));
+            return false;
+        }
+        return true;
+    }
+
+    // Windows takes ownership of the region, so
+    // we'll have to make a copy of the region to give to it.
+    DWORD noBytes = ::GetRegionData(GetHrgnOf(region), 0, NULL);
+    RGNDATA *rgnData = (RGNDATA*) new char[noBytes];
+    ::GetRegionData(GetHrgnOf(region), noBytes, rgnData);
+    HRGN hrgn = ::ExtCreateRegion(NULL, noBytes, rgnData);
+    delete[] (char*) rgnData;
+
+    // SetWindowRgn expects the region to be in coordinates
+    // relative to the window, not the client area.  Figure
+    // out the offset, if any.
+    RECT rect;
+    DWORD dwStyle =   ::GetWindowLong(GetHwnd(), GWL_STYLE);
+    DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
+    ::GetClientRect(GetHwnd(), &rect);
+    ::AdjustWindowRectEx(&rect, dwStyle, ::GetMenu(GetHwnd()) != NULL, dwExStyle);
+    ::OffsetRgn(hrgn, -rect.left, -rect.top);
+
+    // Now call the shape API with the new region.
+    if (::SetWindowRgn(GetHwnd(), hrgn, TRUE) == 0)
+    {
+        wxLogLastError(wxT("SetWindowRgn"));
+        return false;
+    }
+    return true;
+}
+
+#endif // !__WXWINCE__