X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ef359b4350a0b232dfda34b03040eab41eee2e97..8397cab4dafee82a887785a80ab8f588a68d9f27:/include/wx/msw/private.h

diff --git a/include/wx/msw/private.h b/include/wx/msw/private.h
index bd6eec5dc8..fd292868dd 100644
--- a/include/wx/msw/private.h
+++ b/include/wx/msw/private.h
@@ -54,6 +54,12 @@ extern WXDLLEXPORT_DATA(HFONT) wxSTATUS_LINE_FONT;
 
 #endif // wxUSE_GUI
 
+// ---------------------------------------------------------------------------
+// global data
+// ---------------------------------------------------------------------------
+
+extern WXDLLIMPEXP_DATA_BASE(HINSTANCE) wxhInstance;
+
 // ---------------------------------------------------------------------------
 // define things missing from some compilers' headers
 // ---------------------------------------------------------------------------
@@ -168,6 +174,24 @@ extern LONG APIENTRY _EXPORT
 #define wxZeroMemory(obj)   memset((void*) & obj, 0, sizeof(obj))
 #endif
 
+// This one is a macro so that it can be tested with #ifdef, it will be
+// undefined if it cannot be implemented for a given compiler.
+// Vc++, bcc, dmc, ow, mingw, codewarrior (and rsxnt) have _get_osfhandle.
+// Cygwin has get_osfhandle. Others are currently unknown, e.g. Salford,
+// Intel, Visual Age.
+#if defined(__WXWINCE__)
+    #define wxGetOSFHandle(fd) ((HANDLE)fd)
+#elif defined(__CYGWIN__)
+    #define wxGetOSFHandle(fd) ((HANDLE)get_osfhandle(fd))
+#elif defined(__VISUALC__) \
+   || defined(__BORLANDC__) \
+   || defined(__DMC__) \
+   || defined(__WATCOMC__) \
+   || (defined(__GNUWIN32__) || defined(__MINGW32__)) \
+   || (defined(__MWERKS__) && defined(__MSL__))
+    #define wxGetOSFHandle(fd) ((HANDLE)_get_osfhandle(fd))
+#endif
+
 #if wxUSE_GUI
 
 #include <wx/gdicmn.h>
@@ -451,6 +475,64 @@ private:
     DECLARE_NO_COPY_CLASS(GlobalPtr)
 };
 
+// register the class when it is first needed and unregister it in dtor
+class ClassRegistrar
+{
+public:
+    // ctor doesn't register the class, call Initialize() for this
+    ClassRegistrar() { m_registered = -1; }
+
+    // return true if the class is already registered
+    bool IsInitialized() const { return m_registered != -1; }
+
+    // return true if the class had been already registered
+    bool IsRegistered() const { return m_registered == 1; }
+
+    // try to register the class if not done yet, return true on success
+    bool Register(const WNDCLASS& wc)
+    {
+        // we should only be called if we hadn't been initialized yet
+        wxASSERT_MSG( m_registered == -1,
+                        _T("calling ClassRegistrar::Register() twice?") );
+
+        m_registered = ::RegisterClass(&wc) ? 1 : 0;
+        if ( !IsRegistered() )
+        {
+            wxLogLastError(_T("RegisterClassEx()"));
+        }
+        else
+        {
+            m_clsname = wc.lpszClassName;
+        }
+
+        return m_registered == 1;
+    }
+
+    // get the name of the registered class (returns empty string if not
+    // registered)
+    const wxString& GetName() const { return m_clsname; }
+
+    // unregister the class if it had been registered
+    ~ClassRegistrar()
+    {
+        if ( IsRegistered() )
+        {
+            if ( !::UnregisterClass(m_clsname, wxhInstance) )
+            {
+                wxLogLastError(_T("UnregisterClass"));
+            }
+        }
+    }
+
+private:
+    // initial value is -1 which means that we hadn't tried registering the
+    // class yet, it becomes true or false (1 or 0) when Initialize() is called
+    int m_registered;
+
+    // the name of the class, only non empty if it had been registered
+    wxString m_clsname;
+};
+
 // ---------------------------------------------------------------------------
 // macros to make casting between WXFOO and FOO a bit easier: the GetFoo()
 // returns Foo cast to the Windows type for oruselves, while GetFooOf() takes
@@ -498,12 +580,6 @@ private:
 
 #endif // wxUSE_GUI
 
-// ---------------------------------------------------------------------------
-// global data
-// ---------------------------------------------------------------------------
-
-extern WXDLLIMPEXP_DATA_BASE(HINSTANCE) wxhInstance;
-
 // ---------------------------------------------------------------------------
 // global functions
 // ---------------------------------------------------------------------------