include/wx/mac/carbon/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 #include "wx/dc.h"
  19 #include "wx/gdiobj.h"
  20
  21 #if wxUSE_DATAOBJ
  22 #include "wx/dataobj.h"
  23 #endif
  24
  25 /*
  26  * Metafile and metafile device context classes
  27  *
  28  */
  29
  30 #define wxMetaFile wxMetafile
  31 #define wxMetaFileDC wxMetafileDC
  32
  33 class WXDLLEXPORT wxMetafile;
  34 class wxMetafileRefData ;
  35
  36 #define M_METAFILEDATA ((wxMetafileRefData *)m_refData)
  37
  38 class WXDLLEXPORT wxMetafile: public wxGDIObject
  39 {
  40     DECLARE_DYNAMIC_CLASS(wxMetafile)
  41 public:
  42     // Copy constructor
  43     wxMetafile(const wxMetafile& metafile)
  44       : wxGDIObject()
  45     { Ref(metafile); }
  46
  47     wxMetafile(const wxString& file = wxEmptyString);
  48     ~wxMetafile(void);
  49
  50     // After this is called, the metafile cannot be used for anything
  51     // since it is now owned by the clipboard.
  52     virtual bool SetClipboard(int width = 0, int height = 0);
  53
  54     virtual bool Play(wxDC *dc);
  55     bool Ok() const ;
  56
  57     wxSize GetSize() const;
  58     int GetWidth() const { return GetSize().x; }
  59     int GetHeight() const { return GetSize().y; }
  60
  61     // Implementation
  62     WXHMETAFILE GetHMETAFILE() const ;
  63     void SetHMETAFILE(WXHMETAFILE mf) ;
  64
  65     // Operators
  66     inline wxMetafile& operator = (const wxMetafile& metafile) { if (*this == metafile) return (*this); Ref(metafile); return *this; }
  67     inline bool operator == (const wxMetafile& metafile) { return m_refData == metafile.m_refData; }
  68     inline bool operator != (const wxMetafile& metafile) { return m_refData != metafile.m_refData; }
  69
  70 protected:
  71 };
  72
  73 class WXDLLEXPORT wxMetafileDC: public wxDC
  74 {
  75   DECLARE_DYNAMIC_CLASS(wxMetafileDC)
  76
  77  public:
  78     // the ctor parameters specify the filename (empty for memory metafiles),
  79     // the metafile picture size and the optional description/comment
  80     wxMetafileDC(const wxString& filename = wxEmptyString,
  81                     int width = 0, int height = 0,
  82                     const wxString& description = wxEmptyString);
  83
  84   ~wxMetafileDC(void);
  85
  86   // Should be called at end of drawing
  87   virtual wxMetafile *Close(void);
  88   virtual void DoGetSize(int *width, int *height) const ;
  89
  90   // Implementation
  91   inline wxMetafile *GetMetaFile(void) const { return m_metaFile; }
  92   inline void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
  93
  94 protected:
  95   wxMetafile*   m_metaFile;
  96 };
  97
  98 /*
  99  * Pass filename of existing non-placeable metafile, and bounding box.
 100  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 101  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 102  *
 103  */
 104
 105 // No origin or extent
 106 #define wxMakeMetaFilePlaceable wxMakeMetafilePlaceable
 107 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 108
 109 // Optional origin and extent
 110 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = TRUE);
 111
 112 // ----------------------------------------------------------------------------
 113 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 114 // ----------------------------------------------------------------------------
 115
 116 #if wxUSE_DATAOBJ
 117 class WXDLLEXPORT wxMetafileDataObject : public wxDataObjectSimple
 118 {
 119 public:
 120   // ctors
 121   wxMetafileDataObject()
 122     : wxDataObjectSimple(wxDF_METAFILE) {  };
 123   wxMetafileDataObject(const wxMetafile& metafile)
 124     : wxDataObjectSimple(wxDF_METAFILE), m_metafile(metafile) { }
 125
 126     // virtual functions which you may override if you want to provide data on
 127     // demand only - otherwise, the trivial default versions will be used
 128     virtual void SetMetafile(const wxMetafile& metafile)
 129         { m_metafile = metafile; }
 130     virtual wxMetafile GetMetafile() const
 131         { return m_metafile; }
 132
 133     // implement base class pure virtuals
 134     virtual size_t GetDataSize() const;
 135     virtual bool GetDataHere(void *buf) const;
 136     virtual bool SetData(size_t len, const void *buf);
 137
 138     virtual size_t GetDataSize(const wxDataFormat& WXUNUSED(format)) const
 139         { return GetDataSize(); }
 140     virtual bool GetDataHere(const wxDataFormat& WXUNUSED(format),
 141                              void *buf) const
 142         { return GetDataHere(buf); }
 143     virtual bool SetData(const wxDataFormat& WXUNUSED(format),
 144                          size_t len, const void *buf)
 145         { return SetData(len, buf); }
 146 protected:
 147   wxMetafile   m_metafile;
 148 };
 149 #endif
 150
 151 #endif
 152     // _WX_METAFIILE_H_