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