include/wx/os2/metafile.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/os2/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 // Copyright:   (c) David Webster
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13
  14 #ifndef _WX_METAFIILE_H_
  15 #define _WX_METAFIILE_H_
  16
  17 #include "wx/dc.h"
  18 #include "wx/gdiobj.h"
  19 #include "wx/os2/dc.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 WXDLLIMPEXP_FWD_CORE wxMetafile;
  34
  35 class WXDLLIMPEXP_CORE wxMetafileRefData: public wxGDIRefData
  36 {
  37     friend class WXDLLIMPEXP_FWD_CORE wxMetafile;
  38 public:
  39     wxMetafileRefData(void);
  40     virtual ~wxMetafileRefData(void);
  41
  42     virtual bool IsOk() const { return m_metafile != 0; }
  43
  44 public:
  45     WXHANDLE m_metafile;
  46     int m_windowsMappingMode;
  47 };
  48
  49 #define M_METAFILEDATA ((wxMetafileRefData *)m_refData)
  50
  51 class WXDLLIMPEXP_CORE wxMetafile: public wxGDIObject
  52 {
  53     DECLARE_DYNAMIC_CLASS(wxMetafile)
  54 public:
  55     wxMetafile(const wxString& file = wxEmptyString);
  56     virtual ~wxMetafile(void);
  57
  58     // After this is called, the metafile cannot be used for anything
  59     // since it is now owned by the clipboard.
  60     virtual bool SetClipboard(int width = 0, int height = 0);
  61
  62     virtual bool Play(wxDC *dc);
  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 protected:
  71     virtual wxGDIRefData *CreateGDIRefData() const;
  72     virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const;
  73 };
  74
  75 class WXDLLIMPEXP_CORE wxMetafileDCImpl: public wxPMDCImpl
  76 {
  77 public:
  78     wxMetafileDCImpl(wxDC *owner, const wxString& file = wxEmptyString);
  79     wxMetafileDCImpl(wxDC *owner, const wxString& file,
  80                      int xext, int yext, int xorg, int yorg);
  81     virtual ~wxMetafileDCImpl();
  82
  83     virtual wxMetafile *Close();
  84     virtual void SetMapMode(wxMappingMode mode);
  85     virtual void DoGetTextExtent(const wxString& string,
  86                                  wxCoord *x, wxCoord *y,
  87                                  wxCoord *descent = NULL,
  88                                  wxCoord *externalLeading = NULL,
  89                                  const wxFont *theFont = NULL) const;
  90
  91     // Implementation
  92     wxMetafile *GetMetaFile() const { return m_metaFile; }
  93     void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
  94     int GetWindowsMappingMode() const { return m_windowsMappingMode; }
  95     void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
  96
  97 protected:
  98     virtual void DoGetSize(int *width, int *height) const;
  99
 100     int           m_windowsMappingMode;
 101     wxMetafile*   m_metaFile;
 102
 103 private:
 104     DECLARE_CLASS(wxMetafileDCImpl)
 105     wxDECLARE_NO_COPY_CLASS(wxMetafileDCImpl);
 106 };
 107
 108 class WXDLLIMPEXP_CORE wxMetafileDC: public wxDC
 109 {
 110 public:
 111     // Don't supply origin and extent
 112     // Supply them to wxMakeMetaFilePlaceable instead.
 113     wxMetafileDC(const wxString& file = wxEmptyString)
 114          :wxDC(new wxMetafileDCImpl( this, file ))
 115          { }
 116
 117     // Supply origin and extent (recommended).
 118     // Then don't need to supply them to wxMakeMetaFilePlaceable.
 119     wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg)
 120         : wxDC(new wxMetafileDCImpl( this, file, xext, yext, xorg, yorg ))
 121          { }
 122
 123     wxMetafile *GetMetafile() const
 124         { return ((wxMetafileDCImpl*)m_pimpl)->GetMetaFile(); }
 125
 126     virtual ~wxMetafileDC(void)
 127         { delete m_pimpl; }
 128
 129     // Should be called at end of drawing
 130     virtual wxMetafile *Close(void)
 131         { return ((wxMetafileDCImpl*)m_pimpl)->Close(); }
 132
 133     inline void SetMetaFile(wxMetafile *mf)
 134         { ((wxMetafileDCImpl*)m_pimpl)->SetMetaFile(mf); }
 135
 136 private:
 137     DECLARE_CLASS(wxMetafileDC)
 138     wxDECLARE_NO_COPY_CLASS(wxMetafileDC);
 139 };
 140
 141 /*
 142  * Pass filename of existing non-placeable metafile, and bounding box.
 143  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 144  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 145  *
 146  */
 147
 148 // No origin or extent
 149 #define wxMakeMetaFilePlaceable wxMakeMetafilePlaceable
 150 bool WXDLLIMPEXP_CORE wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 151
 152 // Optional origin and extent
 153 bool WXDLLIMPEXP_CORE wxMakeMetaFilePlaceable( const wxString& filename
 154                                          ,int x1
 155                                          ,int y1
 156                                          ,int x2
 157                                          ,int y2
 158                                          ,float scale = 1.0
 159                                          ,bool useOriginAndExtent = true
 160                                         );
 161
 162 // ----------------------------------------------------------------------------
 163 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 164 // ----------------------------------------------------------------------------
 165
 166 // TODO: implement OLE side of things. At present, it's just for clipboard
 167 // use.
 168
 169 #if wxUSE_DRAG_AND_DROP
 170 class WXDLLIMPEXP_CORE wxMetafileDataObject : public wxDataObject
 171 {
 172 public:
 173     // ctors
 174     wxMetafileDataObject() { m_width = 0; m_height = 0; }
 175     wxMetafileDataObject(const wxMetafile& metafile, int width = 0,int height = 0)
 176                         :m_metafile(metafile)
 177                         ,m_width(width)
 178                         ,m_height(height) { }
 179
 180     void SetMetafile(const wxMetafile& metafile, int w = 0, int h = 0)
 181         { m_metafile = metafile; m_width = w; m_height = h; }
 182     wxMetafile GetMetafile() const { return m_metafile; }
 183     int GetWidth() const { return m_width; }
 184     int GetHeight() const { return m_height; }
 185
 186     virtual wxDataFormat GetFormat() const { return wxDF_METAFILE; }
 187
 188 /* ??
 189     // implement base class pure virtuals
 190     virtual wxDataFormat GetPreferredFormat() const
 191         { return (wxDataFormat) wxDataObject::Text; }
 192     virtual bool IsSupportedFormat(wxDataFormat format) const
 193         { return format == wxDataObject::Text || format == wxDataObject::Locale; }
 194     virtual size_t GetDataSize() const
 195         { return m_strText.Len() + 1; } // +1 for trailing '\0'of course
 196     virtual void GetDataHere(void *pBuf) const
 197         { memcpy(pBuf, m_strText.c_str(), GetDataSize()); }
 198 */
 199
 200 private:
 201     wxMetafile   m_metafile;
 202     int          m_width;
 203     int          m_height;
 204 };
 205 #endif
 206
 207 #endif
 208     // _WX_METAFIILE_H_