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