X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1777b9bbf4573dabecf4a3256d0d3c2c0c2a3fdf..ca77701441e39245dcbfce903049e76f166979e5:/include/wx/gdiobj.h?ds=sidebyside diff --git a/include/wx/gdiobj.h b/include/wx/gdiobj.h index 4ab7c5ad81..0c251cc9d6 100644 --- a/include/wx/gdiobj.h +++ b/include/wx/gdiobj.h @@ -1,21 +1,93 @@ +///////////////////////////////////////////////////////////////////////////// +// Name: wx/gdiobj.h +// Purpose: wxGDIObject base header +// Author: Julian Smart +// Modified by: +// Created: +// Copyright: (c) Julian Smart +// RCS-ID: $Id$ +// Licence: wxWindows Licence +///////////////////////////////////////////////////////////////////////////// + #ifndef _WX_GDIOBJ_H_BASE_ #define _WX_GDIOBJ_H_BASE_ -#if defined(__WXMSW__) -#include "wx/msw/gdiobj.h" -#elif defined(__WXMOTIF__) -#include "wx/motif/gdiobj.h" -#elif defined(__WXGTK__) -#include "wx/gtk/gdiobj.h" -#elif defined(__WXQT__) -#include "wx/qt/gdiobj.h" -#elif defined(__WXMAC__) -#include "wx/mac/gdiobj.h" -#elif defined(__WXPM__) -#include "wx/os2/gdiobj.h" -#elif defined(__WXSTUBS__) -#include "wx/stubs/gdiobj.h" -#endif - -#endif - // _WX_GDIOBJ_H_BASE_ +#include "wx/object.h" + +// ---------------------------------------------------------------------------- +// wxGDIRefData is the base class for wxXXXData structures which contain the +// real data for the GDI object and are shared among all wxWin objects sharing +// the same native GDI object +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_CORE wxGDIRefData : public wxObjectRefData +{ +public: + // Default ctor which needs to be defined just because we use + // wxDECLARE_NO_COPY_CLASS() below. + wxGDIRefData() { } + + // override this in the derived classes to check if this data object is + // really fully initialized + virtual bool IsOk() const { return true; } + +private: + wxDECLARE_NO_COPY_CLASS(wxGDIRefData); +}; + +// ---------------------------------------------------------------------------- +// wxGDIObject: base class for bitmaps, pens, brushes, ... +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_CORE wxGDIObject : public wxObject +{ +public: + // checks if the object can be used + virtual bool IsOk() const + { + // the cast here is safe because the derived classes always create + // wxGDIRefData objects + return m_refData && static_cast(m_refData)->IsOk(); + } + + // don't use in the new code, use IsOk() instead + bool IsNull() const { return m_refData == NULL; } + + // older version, for backwards compatibility only (but not deprecated + // because it's still widely used) + bool Ok() const { return IsOk(); } + +#if defined(__WXMSW__) || defined(__WXPM__) + // Creates the resource + virtual bool RealizeResource() { return false; } + + // Frees the resource + virtual bool FreeResource(bool WXUNUSED(force) = false) { return false; } + + virtual bool IsFree() const { return false; } + + // Returns handle. + virtual WXHANDLE GetResourceHandle() const { return 0; } +#endif // defined(__WXMSW__) || defined(__WXPM__) + +protected: + // replace base class functions using wxObjectRefData with our own which + // use wxGDIRefData to ensure that we always work with data objects of the + // correct type (i.e. derived from wxGDIRefData) + virtual wxObjectRefData *CreateRefData() const + { + return CreateGDIRefData(); + } + + virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const + { + return CloneGDIRefData(static_cast(data)); + } + + virtual wxGDIRefData *CreateGDIRefData() const = 0; + virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const = 0; + + DECLARE_DYNAMIC_CLASS(wxGDIObject) +}; + +#endif // _WX_GDIOBJ_H_BASE_