include/wx/osx/metafile.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/osx/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 #include "wx/osx/dcclient.h"
  26
  27 /*
  28  * Metafile and metafile device context classes
  29  *
  30  */
  31
  32 #define wxMetaFile wxMetafile
  33 #define wxMetaFileDC wxMetafileDC
  34
  35 class WXDLLIMPEXP_FWD_CORE wxMetafile;
  36 class wxMetafileRefData ;
  37
  38 #define M_METAFILEDATA ((wxMetafileRefData *)m_refData)
  39
  40 class WXDLLIMPEXP_CORE wxMetafile : public wxGDIObject
  41 {
  42 public:
  43     wxMetafile(const wxString& file = wxEmptyString);
  44     virtual ~wxMetafile(void);
  45
  46     // After this is called, the metafile cannot be used for anything
  47     // since it is now owned by the clipboard.
  48     virtual bool SetClipboard(int width = 0, int height = 0);
  49
  50     virtual bool Play(wxDC *dc);
  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 protected:
  60     virtual wxGDIRefData *CreateGDIRefData() const;
  61     virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const;
  62
  63     DECLARE_DYNAMIC_CLASS(wxMetafile)
  64 };
  65
  66
  67 class WXDLLIMPEXP_CORE wxMetafileDCImpl: public wxGCDCImpl
  68 {
  69 public:
  70     wxMetafileDCImpl( wxDC *owner,
  71                       const wxString& filename,
  72                       int width, int height,
  73                       const wxString& description );
  74
  75     virtual ~wxMetafileDCImpl();
  76
  77     // Should be called at end of drawing
  78     virtual wxMetafile *Close();
  79
  80     // Implementation
  81     wxMetafile *GetMetaFile(void) const { return m_metaFile; }
  82     void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
  83
  84 protected:
  85     virtual void DoGetSize(int *width, int *height) const;
  86
  87     wxMetafile*   m_metaFile;
  88
  89 private:
  90     DECLARE_CLASS(wxMetafileDCImpl)
  91     wxDECLARE_NO_COPY_CLASS(wxMetafileDCImpl);
  92 };
  93
  94 class WXDLLIMPEXP_CORE wxMetafileDC: public wxDC
  95 {
  96  public:
  97     // the ctor parameters specify the filename (empty for memory metafiles),
  98     // the metafile picture size and the optional description/comment
  99     wxMetafileDC(  const wxString& filename = wxEmptyString,
 100                     int width = 0, int height = 0,
 101                     const wxString& description = wxEmptyString ) :
 102       wxDC( new wxMetafileDCImpl( this, filename, width, height, description) )
 103     { }
 104
 105     wxMetafile *GetMetafile() const
 106        { return ((wxMetafileDCImpl*)m_pimpl)->GetMetaFile(); }
 107
 108     wxMetafile *Close()
 109        { return ((wxMetafileDCImpl*)m_pimpl)->Close(); }
 110
 111 private:
 112     DECLARE_CLASS(wxMetafileDC)
 113     wxDECLARE_NO_COPY_CLASS(wxMetafileDC);
 114 };
 115
 116
 117 /*
 118  * Pass filename of existing non-placeable metafile, and bounding box.
 119  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 120  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 121  *
 122  */
 123
 124 // No origin or extent
 125 #define wxMakeMetaFilePlaceable wxMakeMetafilePlaceable
 126 bool WXDLLIMPEXP_CORE wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 127
 128 // Optional origin and extent
 129 bool WXDLLIMPEXP_CORE wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = true);
 130
 131 // ----------------------------------------------------------------------------
 132 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 133 // ----------------------------------------------------------------------------
 134
 135 #if wxUSE_DATAOBJ
 136 class WXDLLIMPEXP_CORE wxMetafileDataObject : public wxDataObjectSimple
 137 {
 138 public:
 139   // ctors
 140   wxMetafileDataObject()
 141     : wxDataObjectSimple(wxDF_METAFILE) {  }
 142   wxMetafileDataObject(const wxMetafile& metafile)
 143     : wxDataObjectSimple(wxDF_METAFILE), m_metafile(metafile) { }
 144
 145     // virtual functions which you may override if you want to provide data on
 146     // demand only - otherwise, the trivial default versions will be used
 147     virtual void SetMetafile(const wxMetafile& metafile)
 148         { m_metafile = metafile; }
 149     virtual wxMetafile GetMetafile() const
 150         { return m_metafile; }
 151
 152     // implement base class pure virtuals
 153     virtual size_t GetDataSize() const;
 154     virtual bool GetDataHere(void *buf) const;
 155     virtual bool SetData(size_t len, const void *buf);
 156
 157     virtual size_t GetDataSize(const wxDataFormat& WXUNUSED(format)) const
 158         { return GetDataSize(); }
 159     virtual bool GetDataHere(const wxDataFormat& WXUNUSED(format),
 160                              void *buf) const
 161         { return GetDataHere(buf); }
 162     virtual bool SetData(const wxDataFormat& WXUNUSED(format),
 163                          size_t len, const void *buf)
 164         { return SetData(len, buf); }
 165 protected:
 166   wxMetafile   m_metafile;
 167 };
 168 #endif
 169
 170 #endif
 171     // _WX_METAFIILE_H_