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     // Copy constructor
  54     inline wxMetafile(const wxMetafile& metafile)
  55     { Ref(metafile); }
  56
  57     wxMetafile(const wxString& file = wxEmptyString);
  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 WXHANDLE GetHMETAFILE(void) { return M_METAFILEDATA->m_metafile; }
  69     void SetHMETAFILE(WXHANDLE mf) ;
  70     inline int GetWindowsMappingMode(void) { return M_METAFILEDATA->m_windowsMappingMode; }
  71     void SetWindowsMappingMode(int mm);
  72
  73     // Operators
  74     inline wxMetafile& operator = (const wxMetafile& metafile)
  75         { if (*this == metafile) return (*this); Ref(metafile); return *this; }
  76     inline bool operator== (const wxMetafile& metafile) const
  77         { return m_refData == metafile.m_refData; }
  78     inline bool operator!= (const wxMetafile& metafile) const
  79         { return m_refData != metafile.m_refData; }
  80 };
  81
  82 class WXDLLEXPORT wxMetafileDC: public wxDC
  83 {
  84     DECLARE_DYNAMIC_CLASS(wxMetafileDC)
  85
  86 public:
  87     // Don't supply origin and extent
  88     // Supply them to wxMakeMetaFilePlaceable instead.
  89     wxMetafileDC(const wxString& file = wxEmptyString);
  90
  91     // Supply origin and extent (recommended).
  92     // Then don't need to supply them to wxMakeMetaFilePlaceable.
  93     wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
  94
  95     ~wxMetafileDC(void);
  96
  97     // Should be called at end of drawing
  98     virtual wxMetafile *Close(void);
  99     virtual void SetMapMode(int mode);
 100     virtual void GetTextExtent(const wxString& string, long *x, long *y,
 101                                long *descent = NULL, long *externalLeading = NULL,
 102                                wxFont *theFont = NULL, bool use16bit = false) const;
 103
 104     // Implementation
 105     inline wxMetafile *GetMetaFile(void) const { return m_metaFile; }
 106     inline void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
 107     inline int GetWindowsMappingMode(void) const { return m_windowsMappingMode; }
 108     inline void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
 109
 110 protected:
 111     int           m_windowsMappingMode;
 112     wxMetafile*   m_metaFile;
 113
 114 private:
 115 #ifndef __WATCOMC__
 116     // function hiding warning supression
 117     // still required ??
 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 #endif
 127 };
 128
 129 /*
 130  * Pass filename of existing non-placeable metafile, and bounding box.
 131  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 132  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 133  *
 134  */
 135
 136 // No origin or extent
 137 #define wxMakeMetaFilePlaceable wxMakeMetafilePlaceable
 138 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 139
 140 // Optional origin and extent
 141 bool WXDLLEXPORT wxMakeMetaFilePlaceable( const wxString& filename
 142                                          ,int x1
 143                                          ,int y1
 144                                          ,int x2
 145                                          ,int y2
 146                                          ,float scale = 1.0
 147                                          ,bool useOriginAndExtent = true
 148                                         );
 149
 150 // ----------------------------------------------------------------------------
 151 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 152 // ----------------------------------------------------------------------------
 153
 154 // TODO: implement OLE side of things. At present, it's just for clipboard
 155 // use.
 156
 157 #if wxUSE_DRAG_AND_DROP
 158 class WXDLLEXPORT wxMetafileDataObject : public wxDataObject
 159 {
 160 public:
 161     // ctors
 162     wxMetafileDataObject() { m_width = 0; m_height = 0; };
 163     wxMetafileDataObject(const wxMetafile& metafile, int width = 0,int height = 0)
 164                         :m_metafile(metafile)
 165                         ,m_width(width)
 166                         ,m_height(height) { }
 167
 168     void SetMetafile(const wxMetafile& metafile, int w = 0, int h = 0)
 169         { m_metafile = metafile; m_width = w; m_height = h; }
 170     wxMetafile GetMetafile() const { return m_metafile; }
 171     int GetWidth() const { return m_width; }
 172     int GetHeight() const { return m_height; }
 173
 174     virtual wxDataFormat GetFormat() const { return wxDF_METAFILE; }
 175
 176 /* ??
 177     // implement base class pure virtuals
 178     virtual wxDataFormat GetPreferredFormat() const
 179         { return (wxDataFormat) wxDataObject::Text; }
 180     virtual bool IsSupportedFormat(wxDataFormat format) const
 181         { return format == wxDataObject::Text || format == wxDataObject::Locale; }
 182     virtual size_t GetDataSize() const
 183         { return m_strText.Len() + 1; } // +1 for trailing '\0'of course
 184     virtual void GetDataHere(void *pBuf) const
 185         { memcpy(pBuf, m_strText.c_str(), GetDataSize()); }
 186 */
 187
 188 private:
 189     wxMetafile   m_metafile;
 190     int          m_width;
 191     int          m_height;
 192 };
 193 #endif
 194
 195 #endif
 196     // _WX_METAFIILE_H_