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:      Stefan Csomor
   7 // Modified by:
   8 // Created:     1998-01-01
   9 // RCS-ID:      $Id$
  10 // Copyright:   (c) Stefan Csomor
  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   wxMetafile(const wxMetafile& metafile)
  55       : wxGDIObject()
  56   { Ref(metafile); }
  57
  58   wxMetafile(const wxString& file = wxEmptyString);
  59   ~wxMetafile(void);
  60
  61   // After this is called, the metafile cannot be used for anything
  62   // since it is now owned by the clipboard.
  63   virtual bool SetClipboard(int width = 0, int height = 0);
  64
  65   virtual bool Play(wxDC *dc);
  66   inline bool Ok(void) const { return (M_METAFILEDATA && (M_METAFILEDATA->m_metafile != 0)); };
  67
  68   // Implementation
  69   inline WXHMETAFILE GetHMETAFILE(void) { return M_METAFILEDATA->m_metafile; }
  70   void SetHMETAFILE(WXHMETAFILE mf) ;
  71
  72   // Operators
  73   inline wxMetafile& operator = (const wxMetafile& metafile) { if (*this == metafile) return (*this); Ref(metafile); return *this; }
  74   inline bool operator == (const wxMetafile& metafile) { return m_refData == metafile.m_refData; }
  75   inline bool operator != (const wxMetafile& metafile) { return m_refData != metafile.m_refData; }
  76
  77 protected:
  78 };
  79
  80 class WXDLLEXPORT wxMetafileDC: public wxDC
  81 {
  82   DECLARE_DYNAMIC_CLASS(wxMetafileDC)
  83
  84  public:
  85   // Don't supply origin and extent
  86   // Supply them to wxMakeMetaFilePlaceable instead.
  87   wxMetafileDC(const wxString& file = wxEmptyString);
  88
  89   // Supply origin and extent (recommended).
  90   // Then don't need to supply them to wxMakeMetaFilePlaceable.
  91   wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
  92
  93   ~wxMetafileDC(void);
  94
  95   // Should be called at end of drawing
  96   virtual wxMetafile *Close(void);
  97
  98   // Implementation
  99   inline wxMetafile *GetMetaFile(void) const { return m_metaFile; }
 100   inline void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
 101
 102 protected:
 103   wxMetafile*   m_metaFile;
 104 };
 105
 106 /*
 107  * Pass filename of existing non-placeable metafile, and bounding box.
 108  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 109  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 110  *
 111  */
 112
 113 // No origin or extent
 114 #define wxMakeMetaFilePlaceable wxMakeMetafilePlaceable
 115 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 116
 117 // Optional origin and extent
 118 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = TRUE);
 119
 120 // ----------------------------------------------------------------------------
 121 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 122 // ----------------------------------------------------------------------------
 123
 124 #if wxUSE_DATAOBJ
 125 class WXDLLEXPORT wxMetafileDataObject : public wxDataObjectSimple
 126 {
 127 public:
 128   // ctors
 129   wxMetafileDataObject()
 130     : wxDataObjectSimple(wxDF_METAFILE) {  };
 131   wxMetafileDataObject(const wxMetafile& metafile)
 132     : wxDataObjectSimple(wxDF_METAFILE), m_metafile(metafile) { }
 133
 134     // virtual functions which you may override if you want to provide data on
 135     // demand only - otherwise, the trivial default versions will be used
 136     virtual void SetMetafile(const wxMetafile& metafile)
 137         { m_metafile = metafile; }
 138     virtual wxMetafile GetMetafile() const
 139         { return m_metafile; }
 140
 141     // implement base class pure virtuals
 142     virtual size_t GetDataSize() const;
 143     virtual bool GetDataHere(void *buf) const;
 144     virtual bool SetData(size_t len, const void *buf);
 145
 146 protected:
 147   wxMetafile   m_metafile;
 148 };
 149 #endif
 150
 151 #endif // wxUSE_METAFILE
 152
 153
 154 #endif
 155     // _WX_METAFIILE_H_