include/wx/os2/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:      David Webster
   7 // Modified by:
   8 // Created:     10/10/99
   9 // RCS-ID:      $Id$
  10 // Copyright:   (c) David Webster
  11 // Licence:     wxWindows licence
  12 /////////////////////////////////////////////////////////////////////////////
  13
  14
  15 #ifndef _WX_METAFIILE_H_
  16 #define _WX_METAFIILE_H_
  17
  18 #include "wx/setup.h"
  19
  20 #if wxUSE_METAFILE
  21 #include "wx/dc.h"
  22 #include "wx/gdiobj.h"
  23
  24 #if wxUSE_DRAG_AND_DROP
  25 #include "wx/dataobj.h"
  26 #endif
  27
  28 /*
  29  * Metafile and metafile device context classes
  30  *
  31  */
  32
  33 #define wxMetaFile wxMetafile
  34 #define wxMetaFileDC wxMetafileDC
  35
  36 class WXDLLEXPORT wxMetafile;
  37
  38 class WXDLLEXPORT wxMetafileRefData: public wxGDIRefData
  39 {
  40     friend class WXDLLEXPORT wxMetafile;
  41 public:
  42     wxMetafileRefData(void);
  43     ~wxMetafileRefData(void);
  44
  45 public:
  46     WXHANDLE m_metafile;
  47     int m_windowsMappingMode;
  48 };
  49
  50 #define M_METAFILEDATA ((wxMetafileRefData *)m_refData)
  51
  52 class WXDLLEXPORT wxMetafile: public wxGDIObject
  53 {
  54   DECLARE_DYNAMIC_CLASS(wxMetafile)
  55  public:
  56   // Copy constructor
  57   inline wxMetafile(const wxMetafile& metafile)
  58   { Ref(metafile); }
  59
  60   wxMetafile(const wxString& file = "");
  61   ~wxMetafile(void);
  62
  63   // After this is called, the metafile cannot be used for anything
  64   // since it is now owned by the clipboard.
  65   virtual bool SetClipboard(int width = 0, int height = 0);
  66
  67   virtual bool Play(wxDC *dc);
  68   inline bool Ok(void) const { return (M_METAFILEDATA && (M_METAFILEDATA->m_metafile != 0)); };
  69
  70   // Implementation
  71   inline WXHANDLE GetHMETAFILE(void) { return M_METAFILEDATA->m_metafile; }
  72   void SetHMETAFILE(WXHANDLE mf) ;
  73   inline int GetWindowsMappingMode(void) { return M_METAFILEDATA->m_windowsMappingMode; }
  74   void SetWindowsMappingMode(int mm);
  75
  76   // Operators
  77   inline wxMetafile& operator = (const wxMetafile& metafile) { if (*this == metafile) return (*this); Ref(metafile); return *this; }
  78   inline bool operator == (const wxMetafile& metafile) { return m_refData == metafile.m_refData; }
  79   inline bool operator != (const wxMetafile& metafile) { return m_refData != metafile.m_refData; }
  80
  81 protected:
  82 };
  83
  84 class WXDLLEXPORT wxMetafileDC: public wxDC
  85 {
  86   DECLARE_DYNAMIC_CLASS(wxMetafileDC)
  87
  88  public:
  89   // Don't supply origin and extent
  90   // Supply them to wxMakeMetaFilePlaceable instead.
  91   wxMetafileDC(const wxString& file = "");
  92
  93   // Supply origin and extent (recommended).
  94   // Then don't need to supply them to wxMakeMetaFilePlaceable.
  95   wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
  96
  97   ~wxMetafileDC(void);
  98
  99   // Should be called at end of drawing
 100   virtual wxMetafile *Close(void);
 101   virtual void SetMapMode(int mode);
 102   virtual void GetTextExtent(const wxString& string, long *x, long *y,
 103                      long *descent = NULL, long *externalLeading = NULL,
 104                      wxFont *theFont = NULL, bool use16bit = FALSE) const;
 105
 106   // Implementation
 107   inline wxMetafile *GetMetaFile(void) const { return m_metaFile; }
 108   inline void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
 109   inline int GetWindowsMappingMode(void) const { return m_windowsMappingMode; }
 110   inline void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
 111
 112 protected:
 113   int           m_windowsMappingMode;
 114   wxMetafile*   m_metaFile;
 115
 116 private:
 117   // function hiding warning supression
 118   inline virtual void   GetTextExtent( const wxString& string
 119                                       ,long*           width
 120                                       ,long*           height
 121                                       ,long*           descent = NULL
 122                                       ,long*           externalLeading = NULL
 123                                       ,wxFont*         theFont = NULL
 124                                      ) const
 125   { GetTextExtent( string, width, height, descent, externalLeading, theFont, FALSE);};
 126 };
 127
 128 /*
 129  * Pass filename of existing non-placeable metafile, and bounding box.
 130  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 131  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 132  *
 133  */
 134
 135 // No origin or extent
 136 #define wxMakeMetaFilePlaceable wxMakeMetafilePlaceable
 137 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 138
 139 // Optional origin and extent
 140 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = TRUE);
 141
 142 // ----------------------------------------------------------------------------
 143 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 144 // ----------------------------------------------------------------------------
 145
 146 // TODO: implement OLE side of things. At present, it's just for clipboard
 147 // use.
 148
 149 #if wxUSE_DRAG_AND_DROP
 150 class WXDLLEXPORT wxMetafileDataObject : public wxDataObject
 151 {
 152 public:
 153   // ctors
 154   wxMetafileDataObject() { m_width = 0; m_height = 0; };
 155   wxMetafileDataObject(const wxMetafile& metafile, int width = 0, int height = 0):
 156     m_metafile(metafile), m_width(width), m_height(height) { }
 157
 158   void SetMetafile(const wxMetafile& metafile, int w = 0, int h = 0)
 159     { m_metafile = metafile; m_width = w; m_height = h; }
 160   wxMetafile GetMetafile() const { return m_metafile; }
 161   int GetWidth() const { return m_width; }
 162   int GetHeight() const { return m_height; }
 163
 164   virtual wxDataFormat GetFormat() const { return wxDF_METAFILE; }
 165
 166 /* ??
 167   // implement base class pure virtuals
 168   virtual wxDataFormat GetPreferredFormat() const
 169     { return (wxDataFormat) wxDataObject::Text; }
 170   virtual bool IsSupportedFormat(wxDataFormat format) const
 171     { return format == wxDataObject::Text || format == wxDataObject::Locale; }
 172   virtual size_t GetDataSize() const
 173     { return m_strText.Len() + 1; } // +1 for trailing '\0'of course
 174   virtual void GetDataHere(void *pBuf) const
 175     { memcpy(pBuf, m_strText.c_str(), GetDataSize()); }
 176 */
 177
 178 private:
 179   wxMetafile   m_metafile;
 180   int          m_width;
 181   int          m_height;
 182 };
 183 #endif
 184
 185 #endif // wxUSE_METAFILE
 186 #endif
 187     // _WX_METAFIILE_H_
 188