include/wx/msw/metafile.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/metafile.h
   3 // Purpose:     wxMetaFile, wxMetaFileDC and wxMetaFileDataObject classes
   4 // Author:      Julian Smart
   5 // Modified by: VZ 07.01.00: implemented wxMetaFileDataObject
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_METAFIILE_H_
  13 #define _WX_METAFIILE_H_
  14
  15 #include "wx/dc.h"
  16 #include "wx/gdiobj.h"
  17
  18 #if wxUSE_DRAG_AND_DROP
  19     #include "wx/dataobj.h"
  20 #endif
  21
  22 // ----------------------------------------------------------------------------
  23 // Metafile and metafile device context classes
  24 // ----------------------------------------------------------------------------
  25
  26 class WXDLLIMPEXP_FWD_CORE wxMetafile;
  27
  28 class WXDLLEXPORT wxMetafileRefData: public wxGDIRefData
  29 {
  30 public:
  31     wxMetafileRefData();
  32     virtual ~wxMetafileRefData();
  33
  34     virtual bool IsOk() const { return m_metafile != 0; }
  35
  36 public:
  37     WXHANDLE m_metafile;
  38     int m_windowsMappingMode;
  39     int m_width, m_height;
  40
  41     friend class WXDLLIMPEXP_FWD_CORE wxMetafile;
  42 };
  43
  44 #define M_METAFILEDATA ((wxMetafileRefData *)m_refData)
  45
  46 class WXDLLEXPORT wxMetafile: public wxGDIObject
  47 {
  48 public:
  49     wxMetafile(const wxString& file = wxEmptyString);
  50     virtual ~wxMetafile();
  51
  52     // After this is called, the metafile cannot be used for anything
  53     // since it is now owned by the clipboard.
  54     virtual bool SetClipboard(int width = 0, int height = 0);
  55
  56     virtual bool Play(wxDC *dc);
  57
  58     // set/get the size of metafile for clipboard operations
  59     wxSize GetSize() const { return wxSize(GetWidth(), GetHeight()); }
  60     int GetWidth() const { return M_METAFILEDATA->m_width; }
  61     int GetHeight() const { return M_METAFILEDATA->m_height; }
  62
  63     void SetWidth(int width) { M_METAFILEDATA->m_width = width; }
  64     void SetHeight(int height) { M_METAFILEDATA->m_height = height; }
  65
  66     // Implementation
  67     WXHANDLE GetHMETAFILE() const { return M_METAFILEDATA->m_metafile; }
  68     void SetHMETAFILE(WXHANDLE mf) ;
  69     int GetWindowsMappingMode() const { return M_METAFILEDATA->m_windowsMappingMode; }
  70     void SetWindowsMappingMode(int mm);
  71
  72 protected:
  73     virtual wxGDIRefData *CreateGDIRefData() const;
  74     virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const;
  75
  76 private:
  77     DECLARE_DYNAMIC_CLASS(wxMetafile)
  78 };
  79
  80 class WXDLLEXPORT wxMetafileDCImpl: public wxMSWDCImpl
  81 {
  82 public:
  83     wxMetafileDCImpl(wxDC *owner, const wxString& file = wxEmptyString);
  84     wxMetafileDCImpl(wxDC *owner, const wxString& file,
  85                      int xext, int yext, int xorg, int yorg);
  86     virtual ~wxMetafileDCImpl();
  87
  88     virtual wxMetafile *Close();
  89     virtual void SetMapMode(int mode);
  90     virtual void DoGetTextExtent(const wxString& string,
  91                                  wxCoord *x, wxCoord *y,
  92                                  wxCoord *descent = NULL,
  93                                  wxCoord *externalLeading = NULL,
  94                                  const wxFont *theFont = NULL) const;
  95
  96     // Implementation
  97     wxMetafile *GetMetaFile() const { return m_metaFile; }
  98     void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
  99     int GetWindowsMappingMode() const { return m_windowsMappingMode; }
 100     void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
 101
 102 protected:
 103     virtual void DoGetSize(int *width, int *height) const;
 104
 105     int           m_windowsMappingMode;
 106     wxMetafile*   m_metaFile;
 107
 108 private:
 109     DECLARE_CLASS(wxMetafileDCImpl)
 110     DECLARE_NO_COPY_CLASS(wxMetafileDCImpl)
 111 };
 112
 113 class WXDLLEXPORT wxMetafileDC: public wxDC
 114 {
 115 public:
 116     // Don't supply origin and extent
 117     // Supply them to wxMakeMetaFilePlaceable instead.
 118     wxMetafileDC(const wxString& file)
 119         : wxDC(new wxMetafileDCImpl( this, file ))
 120         { }
 121
 122     // Supply origin and extent (recommended).
 123     // Then don't need to supply them to wxMakeMetaFilePlaceable.
 124     wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg)
 125         : wxDC(new wxMetafileDCImpl( this, file, xext, yext, xorg, yorg ))
 126         { }
 127
 128     wxMetafile *GetMetafile() const
 129        { return ((wxMetafileDCImpl*)m_pimpl)->GetMetaFile(); }
 130
 131     wxMetafile *Close()
 132        { return ((wxMetafileDCImpl*)m_pimpl)->Close(); }
 133
 134 private:
 135     DECLARE_CLASS(wxMetafileDC)
 136     DECLARE_NO_COPY_CLASS(wxMetafileDC)
 137 };
 138
 139
 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 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 151
 152 // Optional origin and extent
 153 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = true);
 154
 155 // ----------------------------------------------------------------------------
 156 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 157 // ----------------------------------------------------------------------------
 158
 159 #if wxUSE_DRAG_AND_DROP
 160
 161 class WXDLLEXPORT wxMetafileDataObject : public wxDataObjectSimple
 162 {
 163 public:
 164     // ctors
 165     wxMetafileDataObject() : wxDataObjectSimple(wxDF_METAFILE)
 166         { }
 167     wxMetafileDataObject(const wxMetafile& metafile)
 168         : wxDataObjectSimple(wxDF_METAFILE), m_metafile(metafile) { }
 169
 170     // virtual functions which you may override if you want to provide data on
 171     // demand only - otherwise, the trivial default versions will be used
 172     virtual void SetMetafile(const wxMetafile& metafile)
 173         { m_metafile = metafile; }
 174     virtual wxMetafile GetMetafile() const
 175         { return m_metafile; }
 176
 177     // implement base class pure virtuals
 178     virtual size_t GetDataSize() const;
 179     virtual bool GetDataHere(void *buf) const;
 180     virtual bool SetData(size_t len, const void *buf);
 181
 182 protected:
 183     wxMetafile m_metafile;
 184 };
 185
 186 #endif // wxUSE_DRAG_AND_DROP
 187
 188 #endif
 189     // _WX_METAFIILE_H_
 190