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