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 private:
  73     DECLARE_DYNAMIC_CLASS(wxMetafile)
  74 };
  75
  76 class WXDLLEXPORT wxMetafileDCImpl: public wxMSWDCImpl
  77 {
  78 public:
  79     wxMetafileDCImpl(const wxString& file = wxEmptyString);
  80     wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
  81     virtual ~wxMetafileDCImpl();
  82
  83     virtual wxMetafile *Close();
  84     virtual void SetMapMode(int 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     virtual wxGDIRefData *CreateGDIRefData() const;
 101     virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const;
 102
 103     int           m_windowsMappingMode;
 104     wxMetafile*   m_metaFile;
 105
 106 private:
 107     DECLARE_CLASS(wxMetafileDCImpl)
 108     DECLARE_NO_COPY_CLASS(wxMetafileDCImpl)
 109 };
 110
 111 class WXDLLEXPORT wxMetafileDC: public wxDC
 112 {
 113 public:
 114     // Don't supply origin and extent
 115     // Supply them to wxMakeMetaFilePlaceable instead.
 116     wxMetafileDC(const wxString& file);
 117        { m_pimpl = new wxMetafileDCImpl( this, file ); }
 118
 119     // Supply origin and extent (recommended).
 120     // Then don't need to supply them to wxMakeMetaFilePlaceable.
 121     wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg)
 122        { m_pimpl = new wxMetafileDCImpl( this, file, xext, yext, xorg, yorg ); }
 123
 124     wxMetafile *GetMetafile() const
 125        { return ((wxMetafileDCImpl*)m_pimpl)->GetMetaFile(); }
 126
 127     wxMetafile *Close()
 128        { return ((wxMetafileDCImpl*)m_pimpl)->Close(); }
 129
 130 private:
 131     DECLARE_CLASS(wxMetafileDC)
 132     DECLARE_NO_COPY_CLASS(wxMetafileDC)
 133 };
 134
 135
 136
 137
 138 /*
 139  * Pass filename of existing non-placeable metafile, and bounding box.
 140  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 141  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 142  *
 143  */
 144
 145 // No origin or extent
 146 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 147
 148 // Optional origin and extent
 149 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = true);
 150
 151 // ----------------------------------------------------------------------------
 152 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 153 // ----------------------------------------------------------------------------
 154
 155 #if wxUSE_DRAG_AND_DROP
 156
 157 class WXDLLEXPORT wxMetafileDataObject : public wxDataObjectSimple
 158 {
 159 public:
 160     // ctors
 161     wxMetafileDataObject() : wxDataObjectSimple(wxDF_METAFILE)
 162         { }
 163     wxMetafileDataObject(const wxMetafile& metafile)
 164         : wxDataObjectSimple(wxDF_METAFILE), m_metafile(metafile) { }
 165
 166     // virtual functions which you may override if you want to provide data on
 167     // demand only - otherwise, the trivial default versions will be used
 168     virtual void SetMetafile(const wxMetafile& metafile)
 169         { m_metafile = metafile; }
 170     virtual wxMetafile GetMetafile() const
 171         { return m_metafile; }
 172
 173     // implement base class pure virtuals
 174     virtual size_t GetDataSize() const;
 175     virtual bool GetDataHere(void *buf) const;
 176     virtual bool SetData(size_t len, const void *buf);
 177
 178 protected:
 179     wxMetafile m_metafile;
 180 };
 181
 182 #endif // wxUSE_DRAG_AND_DROP
 183
 184 #endif
 185     // _WX_METAFIILE_H_
 186