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_DRAG_AND_DROP
  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     PicHandle 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 PicHandle GetHMETAFILE(void) { return M_METAFILEDATA->m_metafile; }
  69   void SetHMETAFILE(PicHandle 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 // TODO: implement OLE side of things. At present, it's just for clipboard
 124 // use.
 125
 126 #if wxUSE_DRAG_AND_DROP
 127 class WXDLLEXPORT wxMetafileDataObject : public wxDataObject
 128 {
 129 public:
 130   // ctors
 131   wxMetafileDataObject() { m_width = 0; m_height = 0; };
 132   wxMetafileDataObject(const wxMetafile& metafile, int width = 0, int height = 0):
 133     m_metafile(metafile), m_width(width), m_height(height) { }
 134
 135   void SetMetafile(const wxMetafile& metafile, int w = 0, int h = 0)
 136     { m_metafile = metafile; m_width = w; m_height = h; }
 137   wxMetafile GetMetafile() const { return m_metafile; }
 138   int GetWidth() const { return m_width; }
 139   int GetHeight() const { return m_height; }
 140
 141   virtual wxDataFormat GetFormat() const { return wxDF_METAFILE; }
 142
 143 /* ??
 144   // implement base class pure virtuals
 145   virtual wxDataFormat GetPreferredFormat() const
 146     { return (wxDataFormat) wxDataObject::Text; }
 147   virtual bool IsSupportedFormat(wxDataFormat format) const
 148     { return format == wxDataObject::Text || format == wxDataObject::Locale; }
 149   virtual size_t GetDataSize() const
 150     { return m_strText.Len() + 1; } // +1 for trailing '\0'of course
 151   virtual void GetDataHere(void *pBuf) const
 152     { memcpy(pBuf, m_strText.c_str(), GetDataSize()); }
 153 */
 154
 155 private:
 156   wxMetafile   m_metafile;
 157   int          m_width;
 158   int          m_height;
 159 };
 160 #endif
 161
 162 #endif // wxUSE_METAFILE
 163
 164
 165 #endif
 166     // _WX_METAFIILE_H_