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     friend class WXDLLIMPEXP_FWD_CORE wxMetafile;
  31 public:
  32     wxMetafileRefData();
  33     virtual ~wxMetafileRefData();
  34
  35 public:
  36     WXHANDLE m_metafile;
  37     int m_windowsMappingMode;
  38     int m_width, m_height;
  39 };
  40
  41 #define M_METAFILEDATA ((wxMetafileRefData *)m_refData)
  42
  43 class WXDLLEXPORT wxMetafile: public wxGDIObject
  44 {
  45 public:
  46     wxMetafile(const wxString& file = wxEmptyString);
  47     virtual ~wxMetafile();
  48
  49     // After this is called, the metafile cannot be used for anything
  50     // since it is now owned by the clipboard.
  51     virtual bool SetClipboard(int width = 0, int height = 0);
  52
  53     virtual bool Play(wxDC *dc);
  54     bool Ok() const { return IsOk(); }
  55     bool IsOk() const { return (M_METAFILEDATA && (M_METAFILEDATA->m_metafile != 0)); };
  56
  57     // set/get the size of metafile for clipboard operations
  58     wxSize GetSize() const { return wxSize(GetWidth(), GetHeight()); }
  59     int GetWidth() const { return M_METAFILEDATA->m_width; }
  60     int GetHeight() const { return M_METAFILEDATA->m_height; }
  61
  62     void SetWidth(int width) { M_METAFILEDATA->m_width = width; }
  63     void SetHeight(int height) { M_METAFILEDATA->m_height = height; }
  64
  65     // Implementation
  66     WXHANDLE GetHMETAFILE() const { return M_METAFILEDATA->m_metafile; }
  67     void SetHMETAFILE(WXHANDLE mf) ;
  68     int GetWindowsMappingMode() const { return M_METAFILEDATA->m_windowsMappingMode; }
  69     void SetWindowsMappingMode(int mm);
  70
  71 private:
  72     DECLARE_DYNAMIC_CLASS(wxMetafile)
  73 };
  74
  75 class WXDLLEXPORT wxMetafileDC: public wxDC
  76 {
  77 public:
  78     // Don't supply origin and extent
  79     // Supply them to wxMakeMetaFilePlaceable instead.
  80     wxMetafileDC(const wxString& file = wxEmptyString);
  81
  82     // Supply origin and extent (recommended).
  83     // Then don't need to supply them to wxMakeMetaFilePlaceable.
  84     wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
  85
  86     virtual ~wxMetafileDC();
  87
  88     // Should be called at end of drawing
  89     virtual wxMetafile *Close();
  90     virtual void SetMapMode(int mode);
  91     virtual void DoGetTextExtent(const wxString& string,
  92                                  wxCoord *x, wxCoord *y,
  93                                  wxCoord *descent = NULL,
  94                                  wxCoord *externalLeading = NULL,
  95                                  const wxFont *theFont = NULL) const;
  96
  97     // Implementation
  98     wxMetafile *GetMetaFile() const { return m_metaFile; }
  99     void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
 100     int GetWindowsMappingMode() const { return m_windowsMappingMode; }
 101     void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
 102
 103 protected:
 104     virtual void DoGetSize(int *width, int *height) const;
 105
 106     int           m_windowsMappingMode;
 107     wxMetafile*   m_metaFile;
 108
 109 private:
 110     DECLARE_DYNAMIC_CLASS(wxMetafileDC)
 111 };
 112
 113 /*
 114  * Pass filename of existing non-placeable metafile, and bounding box.
 115  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 116  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 117  *
 118  */
 119
 120 // No origin or extent
 121 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 122
 123 // Optional origin and extent
 124 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = true);
 125
 126 // ----------------------------------------------------------------------------
 127 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 128 // ----------------------------------------------------------------------------
 129
 130 #if wxUSE_DRAG_AND_DROP
 131
 132 class WXDLLEXPORT wxMetafileDataObject : public wxDataObjectSimple
 133 {
 134 public:
 135     // ctors
 136     wxMetafileDataObject() : wxDataObjectSimple(wxDF_METAFILE)
 137         { }
 138     wxMetafileDataObject(const wxMetafile& metafile)
 139         : wxDataObjectSimple(wxDF_METAFILE), m_metafile(metafile) { }
 140
 141     // virtual functions which you may override if you want to provide data on
 142     // demand only - otherwise, the trivial default versions will be used
 143     virtual void SetMetafile(const wxMetafile& metafile)
 144         { m_metafile = metafile; }
 145     virtual wxMetafile GetMetafile() const
 146         { return m_metafile; }
 147
 148     // implement base class pure virtuals
 149     virtual size_t GetDataSize() const;
 150     virtual bool GetDataHere(void *buf) const;
 151     virtual bool SetData(size_t len, const void *buf);
 152
 153 protected:
 154     wxMetafile m_metafile;
 155 };
 156
 157 #endif // wxUSE_DRAG_AND_DROP
 158
 159 #endif
 160     // _WX_METAFIILE_H_
 161