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 = wxEmptyString);
  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)
  78         { if (*this == metafile) return (*this); Ref(metafile); return *this; }
  79     inline bool operator== (const wxMetafile& metafile) const
  80         { return m_refData == metafile.m_refData; }
  81     inline bool operator!= (const wxMetafile& metafile) const
  82         { return m_refData != metafile.m_refData; }
  83 };
  84
  85 class WXDLLEXPORT wxMetafileDC: public wxDC
  86 {
  87     DECLARE_DYNAMIC_CLASS(wxMetafileDC)
  88
  89 public:
  90     // Don't supply origin and extent
  91     // Supply them to wxMakeMetaFilePlaceable instead.
  92     wxMetafileDC(const wxString& file = wxEmptyString);
  93
  94     // Supply origin and extent (recommended).
  95     // Then don't need to supply them to wxMakeMetaFilePlaceable.
  96     wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
  97
  98     ~wxMetafileDC(void);
  99
 100     // Should be called at end of drawing
 101     virtual wxMetafile *Close(void);
 102     virtual void SetMapMode(int mode);
 103     virtual void GetTextExtent(const wxString& string, long *x, long *y,
 104                                long *descent = NULL, long *externalLeading = NULL,
 105                                wxFont *theFont = NULL, bool use16bit = false) const;
 106
 107     // Implementation
 108     inline wxMetafile *GetMetaFile(void) const { return m_metaFile; }
 109     inline void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
 110     inline int GetWindowsMappingMode(void) const { return m_windowsMappingMode; }
 111     inline void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
 112
 113 protected:
 114     int           m_windowsMappingMode;
 115     wxMetafile*   m_metaFile;
 116
 117 private:
 118 #ifndef __WATCOMC__
 119     // function hiding warning supression
 120     // still required ??
 121     inline virtual void   GetTextExtent( const wxString& string
 122                                         ,long*           width
 123                                         ,long*           height
 124                                         ,long*           descent = NULL
 125                                         ,long*           externalLeading = NULL
 126                                         ,wxFont*         theFont = NULL
 127                                        ) const
 128     { GetTextExtent( string, width, height, descent, externalLeading, theFont, false);};
 129 #endif
 130 };
 131
 132 /*
 133  * Pass filename of existing non-placeable metafile, and bounding box.
 134  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 135  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 136  *
 137  */
 138
 139 // No origin or extent
 140 #define wxMakeMetaFilePlaceable wxMakeMetafilePlaceable
 141 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 142
 143 // Optional origin and extent
 144 bool WXDLLEXPORT wxMakeMetaFilePlaceable( const wxString& filename
 145                                          ,int x1
 146                                          ,int y1
 147                                          ,int x2
 148                                          ,int y2
 149                                          ,float scale = 1.0
 150                                          ,bool useOriginAndExtent = true
 151                                         );
 152
 153 // ----------------------------------------------------------------------------
 154 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 155 // ----------------------------------------------------------------------------
 156
 157 // TODO: implement OLE side of things. At present, it's just for clipboard
 158 // use.
 159
 160 #if wxUSE_DRAG_AND_DROP
 161 class WXDLLEXPORT wxMetafileDataObject : public wxDataObject
 162 {
 163 public:
 164     // ctors
 165     wxMetafileDataObject() { m_width = 0; m_height = 0; };
 166     wxMetafileDataObject(const wxMetafile& metafile, int width = 0,int height = 0)
 167                         :m_metafile(metafile)
 168                         ,m_width(width)
 169                         ,m_height(height) { }
 170
 171     void SetMetafile(const wxMetafile& metafile, int w = 0, int h = 0)
 172         { m_metafile = metafile; m_width = w; m_height = h; }
 173     wxMetafile GetMetafile() const { return m_metafile; }
 174     int GetWidth() const { return m_width; }
 175     int GetHeight() const { return m_height; }
 176
 177     virtual wxDataFormat GetFormat() const { return wxDF_METAFILE; }
 178
 179 /* ??
 180     // implement base class pure virtuals
 181     virtual wxDataFormat GetPreferredFormat() const
 182         { return (wxDataFormat) wxDataObject::Text; }
 183     virtual bool IsSupportedFormat(wxDataFormat format) const
 184         { return format == wxDataObject::Text || format == wxDataObject::Locale; }
 185     virtual size_t GetDataSize() const
 186         { return m_strText.Len() + 1; } // +1 for trailing '\0'of course
 187     virtual void GetDataHere(void *pBuf) const
 188         { memcpy(pBuf, m_strText.c_str(), GetDataSize()); }
 189 */
 190
 191 private:
 192     wxMetafile   m_metafile;
 193     int          m_width;
 194     int          m_height;
 195 };
 196 #endif
 197
 198 #endif // wxUSE_METAFILE
 199 #endif
 200     // _WX_METAFIILE_H_