include/wx/mac/metafile.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        metafile.h
   3 // Purpose:     wxMetaFile, wxMetaFileDC classes.
   4 //              This probably should be restricted to Windows platforms,
   5 //              but if there is an equivalent on your platform, great.
   6 // Author:      AUTHOR
   7 // Modified by:
   8 // Created:     ??/??/98
   9 // RCS-ID:      $Id$
  10 // Copyright:   (c) AUTHOR
  11 // Licence:     wxWindows licence
  12 /////////////////////////////////////////////////////////////////////////////
  13
  14
  15 #ifndef _WX_METAFIILE_H_
  16 #define _WX_METAFIILE_H_
  17
  18 #if wxUSE_METAFILE
  19 #include "wx/dc.h"
  20 #include "wx/gdiobj.h"
  21
  22 #if wxUSE_DATAOBJ
  23 #include "wx/dataobj.h"
  24 #endif
  25
  26 /*
  27  * Metafile and metafile device context classes
  28  *
  29  */
  30
  31 #define wxMetaFile wxMetafile
  32 #define wxMetaFileDC wxMetafileDC
  33
  34 class WXDLLEXPORT wxMetafile;
  35
  36 class WXDLLEXPORT wxMetafileRefData: public wxGDIRefData
  37 {
  38     friend class WXDLLEXPORT wxMetafile;
  39 public:
  40     wxMetafileRefData(void);
  41     ~wxMetafileRefData(void);
  42
  43 public:
  44     WXHMETAFILE m_metafile;
  45 };
  46
  47 #define M_METAFILEDATA ((wxMetafileRefData *)m_refData)
  48
  49 class WXDLLEXPORT wxMetafile: public wxGDIObject
  50 {
  51   DECLARE_DYNAMIC_CLASS(wxMetafile)
  52  public:
  53   // Copy constructor
  54   inline wxMetafile(const wxMetafile& metafile)
  55   { Ref(metafile); }
  56
  57   wxMetafile(const wxString& file = "");
  58   ~wxMetafile(void);
  59
  60   // After this is called, the metafile cannot be used for anything
  61   // since it is now owned by the clipboard.
  62   virtual bool SetClipboard(int width = 0, int height = 0);
  63
  64   virtual bool Play(wxDC *dc);
  65   inline bool Ok(void) const { return (M_METAFILEDATA && (M_METAFILEDATA->m_metafile != 0)); };
  66
  67   // Implementation
  68   inline WXHMETAFILE GetHMETAFILE(void) { return M_METAFILEDATA->m_metafile; }
  69   void SetHMETAFILE(WXHMETAFILE mf) ;
  70
  71   // Operators
  72   inline wxMetafile& operator = (const wxMetafile& metafile) { if (*this == metafile) return (*this); Ref(metafile); return *this; }
  73   inline bool operator == (const wxMetafile& metafile) { return m_refData == metafile.m_refData; }
  74   inline bool operator != (const wxMetafile& metafile) { return m_refData != metafile.m_refData; }
  75
  76 protected:
  77 };
  78
  79 class WXDLLEXPORT wxMetafileDC: public wxDC
  80 {
  81   DECLARE_DYNAMIC_CLASS(wxMetafileDC)
  82
  83  public:
  84   // Don't supply origin and extent
  85   // Supply them to wxMakeMetaFilePlaceable instead.
  86   wxMetafileDC(const wxString& file = "");
  87
  88   // Supply origin and extent (recommended).
  89   // Then don't need to supply them to wxMakeMetaFilePlaceable.
  90   wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
  91
  92   ~wxMetafileDC(void);
  93
  94   // Should be called at end of drawing
  95   virtual wxMetafile *Close(void);
  96
  97   // Implementation
  98   inline wxMetafile *GetMetaFile(void) const { return m_metaFile; }
  99   inline void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
 100
 101 protected:
 102   wxMetafile*   m_metaFile;
 103 };
 104
 105 /*
 106  * Pass filename of existing non-placeable metafile, and bounding box.
 107  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 108  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 109  *
 110  */
 111
 112 // No origin or extent
 113 #define wxMakeMetaFilePlaceable wxMakeMetafilePlaceable
 114 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 115
 116 // Optional origin and extent
 117 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = TRUE);
 118
 119 // ----------------------------------------------------------------------------
 120 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 121 // ----------------------------------------------------------------------------
 122
 123 #if wxUSE_DATAOBJ
 124 class WXDLLEXPORT wxMetafileDataObject : public wxDataObjectSimple
 125 {
 126 public:
 127   // ctors
 128   wxMetafileDataObject()
 129     : wxDataObjectSimple(wxDF_METAFILE) {  };
 130   wxMetafileDataObject(const wxMetafile& metafile)
 131     : wxDataObjectSimple(wxDF_METAFILE), m_metafile(metafile) { }
 132
 133     // virtual functions which you may override if you want to provide data on
 134     // demand only - otherwise, the trivial default versions will be used
 135     virtual void SetMetafile(const wxMetafile& metafile)
 136         { m_metafile = metafile; }
 137     virtual wxMetafile GetMetafile() const
 138         { return m_metafile; }
 139
 140     // implement base class pure virtuals
 141     virtual size_t GetDataSize() const;
 142     virtual bool GetDataHere(void *buf) const;
 143     virtual bool SetData(size_t len, const void *buf);
 144
 145 protected:
 146   wxMetafile   m_metafile;
 147 };
 148 #endif
 149
 150 #endif // wxUSE_METAFILE
 151
 152
 153 #endif
 154     // _WX_METAFIILE_H_