Fix Ok/IsOk() mess in wxGDIObject-derived classes; also added

wxGDIObject::Create/CloneGDIRefData() and implemented them for (almost) all
ports


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@50727 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/x11/bitmap.cpp

@@ -227,7 +227,7 @@ bool wxMask::Create( const wxBitmap& bitmap )
 // wxBitmap
 //-----------------------------------------------------------------------------
 
-class wxBitmapRefData: public wxObjectRefData
+class wxBitmapRefData : public wxGDIRefData
 {
 public:
     wxBitmapRefData();
@@ -237,6 +237,8 @@ public:
     // shouldn't be called more than once as it doesn't free the existing data
     bool Create(int width, int height, int depth);
 
+    virtual bool IsOk() const { return m_pixmap || m_bitmap; }
+
     Pixmap          m_pixmap;
     Pixmap          m_bitmap;
     Display        *m_display;
@@ -430,12 +432,12 @@ wxBitmap::wxBitmap(const char* const* bits)
     Create(bits, wxBITMAP_TYPE_XPM_DATA, 0, 0, 0);
 }
 
-wxObjectRefData *wxBitmap::CreateRefData() const
+wxGDIRefData *wxBitmap::CreateGDIRefData() const
 {
     return new wxBitmapRefData;
 }
 
-wxObjectRefData *wxBitmap::CloneRefData(const wxObjectRefData *data) const
+wxGDIRefData *wxBitmap::CloneGDIRefData(const wxGDIRefData *data) const
 {
     return new wxBitmapRefData(*wx_static_cast(const wxBitmapRefData *, data));
 }
@@ -934,11 +936,6 @@ wxBitmap::~wxBitmap()
 {
 }
 
-bool wxBitmap::IsOk() const
-{
-    return (m_refData != NULL);
-}
-
 int wxBitmap::GetHeight() const
 {
     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );