+ wxDECLARE_NO_COPY_CLASS(HDCClipper);
+};
+
+// set the given map mode for the life time of this object
+//
+// NB: SetMapMode() is not supported by CE so we also define a helper macro
+// to avoid using it there
+#ifdef __WXWINCE__
+ #define wxCHANGE_HDC_MAP_MODE(hdc, mm)
+#else // !__WXWINCE__
+ class HDCMapModeChanger
+ {
+ public:
+ HDCMapModeChanger(HDC hdc, int mm)
+ : m_hdc(hdc)
+ {
+ m_modeOld = ::SetMapMode(hdc, mm);
+ if ( !m_modeOld )
+ {
+ wxLogLastError(wxT("SelectClipRgn"));
+ }
+ }
+
+ ~HDCMapModeChanger()
+ {
+ if ( m_modeOld )
+ ::SetMapMode(m_hdc, m_modeOld);
+ }
+
+ private:
+ HDC m_hdc;
+ int m_modeOld;
+
+ wxDECLARE_NO_COPY_CLASS(HDCMapModeChanger);
+ };
+
+ #define wxCHANGE_HDC_MAP_MODE(hdc, mm) \
+ HDCMapModeChanger wxMAKE_UNIQUE_NAME(wxHDCMapModeChanger)(hdc, mm)
+#endif // __WXWINCE__/!__WXWINCE__
+
+// smart pointer using GlobalAlloc/GlobalFree()
+class GlobalPtr
+{
+public:
+ // default ctor, call Init() later
+ GlobalPtr()
+ {
+ m_hGlobal = NULL;
+ }
+
+ // allocates a block of given size
+ void Init(size_t size, unsigned flags = GMEM_MOVEABLE)
+ {
+ m_hGlobal = ::GlobalAlloc(flags, size);
+ if ( !m_hGlobal )
+ {
+ wxLogLastError(wxT("GlobalAlloc"));
+ }
+ }
+
+ GlobalPtr(size_t size, unsigned flags = GMEM_MOVEABLE)
+ {
+ Init(size, flags);
+ }
+
+ ~GlobalPtr()
+ {
+ if ( m_hGlobal && ::GlobalFree(m_hGlobal) )
+ {
+ wxLogLastError(wxT("GlobalFree"));
+ }
+ }
+
+ // implicit conversion
+ operator HGLOBAL() const { return m_hGlobal; }
+
+private:
+ HGLOBAL m_hGlobal;
+
+ wxDECLARE_NO_COPY_CLASS(GlobalPtr);