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