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 #include "wx/os2/dc.h"
  21
  22 #if wxUSE_DRAG_AND_DROP
  23 #include "wx/dataobj.h"
  24 #endif
  25
  26 /*
  27  * Metafile and metafile device context classes
  28  *
  29  */
  30
  31 #define wxMetaFile wxMetafile
  32 #define wxMetaFileDC wxMetafileDC
  33
  34 class WXDLLIMPEXP_FWD_CORE wxMetafile;
  35
  36 class WXDLLIMPEXP_CORE wxMetafileRefData: public wxGDIRefData
  37 {
  38     friend class WXDLLIMPEXP_FWD_CORE wxMetafile;
  39 public:
  40     wxMetafileRefData(void);
  41     virtual ~wxMetafileRefData(void);
  42
  43     virtual bool IsOk() const { return m_metafile != 0; }
  44
  45 public:
  46     WXHANDLE m_metafile;
  47     int m_windowsMappingMode;
  48 };
  49
  50 #define M_METAFILEDATA ((wxMetafileRefData *)m_refData)
  51
  52 class WXDLLIMPEXP_CORE wxMetafile: public wxGDIObject
  53 {
  54     DECLARE_DYNAMIC_CLASS(wxMetafile)
  55 public:
  56     wxMetafile(const wxString& file = wxEmptyString);
  57     virtual ~wxMetafile(void);
  58
  59     // After this is called, the metafile cannot be used for anything
  60     // since it is now owned by the clipboard.
  61     virtual bool SetClipboard(int width = 0, int height = 0);
  62
  63     virtual bool Play(wxDC *dc);
  64
  65     // Implementation
  66     inline WXHANDLE GetHMETAFILE(void) { return M_METAFILEDATA->m_metafile; }
  67     void SetHMETAFILE(WXHANDLE mf) ;
  68     inline int GetWindowsMappingMode(void) { return M_METAFILEDATA->m_windowsMappingMode; }
  69     void SetWindowsMappingMode(int mm);
  70
  71 protected:
  72     virtual wxGDIRefData *CreateGDIRefData() const;
  73     virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const;
  74 };
  75
  76 class WXDLLIMPEXP_CORE wxMetafileDCImpl: public wxPMDCImpl
  77 {
  78 public:
  79     wxMetafileDCImpl(wxDC *owner, const wxString& file = wxEmptyString);
  80     wxMetafileDCImpl(wxDC *owner, const wxString& file,
  81                      int xext, int yext, int xorg, int yorg);
  82     virtual ~wxMetafileDCImpl();
  83
  84     virtual wxMetafile *Close();
  85     virtual void SetMapMode(int mode);
  86     virtual void DoGetTextExtent(const wxString& string,
  87                                  wxCoord *x, wxCoord *y,
  88                                  wxCoord *descent = NULL,
  89                                  wxCoord *externalLeading = NULL,
  90                                  const wxFont *theFont = NULL) const;
  91
  92     // Implementation
  93     wxMetafile *GetMetaFile() const { return m_metaFile; }
  94     void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
  95     int GetWindowsMappingMode() const { return m_windowsMappingMode; }
  96     void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
  97
  98 protected:
  99     virtual void DoGetSize(int *width, int *height) const;
 100
 101     int           m_windowsMappingMode;
 102     wxMetafile*   m_metaFile;
 103
 104 private:
 105     DECLARE_CLASS(wxMetafileDCImpl)
 106     DECLARE_NO_COPY_CLASS(wxMetafileDCImpl)
 107 };
 108
 109 class WXDLLIMPEXP_CORE wxMetafileDC: public wxDC
 110 {
 111 public:
 112     // Don't supply origin and extent
 113     // Supply them to wxMakeMetaFilePlaceable instead.
 114     wxMetafileDC(const wxString& file = wxEmptyString)
 115          :wxDC(new wxMetafileDCImpl( this, file ))
 116          { }
 117
 118     // Supply origin and extent (recommended).
 119     // Then don't need to supply them to wxMakeMetaFilePlaceable.
 120     wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg)
 121         : wxDC(new wxMetafileDCImpl( this, file, xext, yext, xorg, yorg ))
 122          { }
 123
 124     wxMetafile *GetMetafile() const
 125         { return ((wxMetafileDCImpl*)m_pimpl)->GetMetaFile(); }
 126
 127     virtual ~wxMetafileDC(void)
 128         { delete m_pimpl; }
 129
 130     // Should be called at end of drawing
 131     virtual wxMetafile *Close(void)
 132         { return ((wxMetafileDCImpl*)m_pimpl)->Close(); }
 133
 134     inline void SetMetaFile(wxMetafile *mf)
 135         { ((wxMetafileDCImpl*)m_pimpl)->SetMetaFile(mf); }
 136
 137 private:
 138     DECLARE_CLASS(wxMetafileDC)
 139     DECLARE_NO_COPY_CLASS(wxMetafileDC)
 140 };
 141
 142 /*
 143  * Pass filename of existing non-placeable metafile, and bounding box.
 144  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 145  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 146  *
 147  */
 148
 149 // No origin or extent
 150 #define wxMakeMetaFilePlaceable wxMakeMetafilePlaceable
 151 bool WXDLLIMPEXP_CORE wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 152
 153 // Optional origin and extent
 154 bool WXDLLIMPEXP_CORE wxMakeMetaFilePlaceable( const wxString& filename
 155                                          ,int x1
 156                                          ,int y1
 157                                          ,int x2
 158                                          ,int y2
 159                                          ,float scale = 1.0
 160                                          ,bool useOriginAndExtent = true
 161                                         );
 162
 163 // ----------------------------------------------------------------------------
 164 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 165 // ----------------------------------------------------------------------------
 166
 167 // TODO: implement OLE side of things. At present, it's just for clipboard
 168 // use.
 169
 170 #if wxUSE_DRAG_AND_DROP
 171 class WXDLLIMPEXP_CORE wxMetafileDataObject : public wxDataObject
 172 {
 173 public:
 174     // ctors
 175     wxMetafileDataObject() { m_width = 0; m_height = 0; };
 176     wxMetafileDataObject(const wxMetafile& metafile, int width = 0,int height = 0)
 177                         :m_metafile(metafile)
 178                         ,m_width(width)
 179                         ,m_height(height) { }
 180
 181     void SetMetafile(const wxMetafile& metafile, int w = 0, int h = 0)
 182         { m_metafile = metafile; m_width = w; m_height = h; }
 183     wxMetafile GetMetafile() const { return m_metafile; }
 184     int GetWidth() const { return m_width; }
 185     int GetHeight() const { return m_height; }
 186
 187     virtual wxDataFormat GetFormat() const { return wxDF_METAFILE; }
 188
 189 /* ??
 190     // implement base class pure virtuals
 191     virtual wxDataFormat GetPreferredFormat() const
 192         { return (wxDataFormat) wxDataObject::Text; }
 193     virtual bool IsSupportedFormat(wxDataFormat format) const
 194         { return format == wxDataObject::Text || format == wxDataObject::Locale; }
 195     virtual size_t GetDataSize() const
 196         { return m_strText.Len() + 1; } // +1 for trailing '\0'of course
 197     virtual void GetDataHere(void *pBuf) const
 198         { memcpy(pBuf, m_strText.c_str(), GetDataSize()); }
 199 */
 200
 201 private:
 202     wxMetafile   m_metafile;
 203     int          m_width;
 204     int          m_height;
 205 };
 206 #endif
 207
 208 #endif
 209     // _WX_METAFIILE_H_