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 #ifdef __GNUG__
  16     #pragma interface "metafile.h"
  17 #endif
  18
  19 #include "wx/setup.h"
  20
  21 #if wxUSE_METAFILE
  22
  23 #include "wx/dc.h"
  24 #include "wx/gdiobj.h"
  25
  26 #if wxUSE_DRAG_AND_DROP
  27     #include "wx/dataobj.h"
  28 #endif
  29
  30 // ----------------------------------------------------------------------------
  31 // Metafile and metafile device context classes
  32 // ----------------------------------------------------------------------------
  33
  34 class WXDLLEXPORT wxMetafile;
  35
  36 class WXDLLEXPORT wxMetafileRefData: public wxGDIRefData
  37 {
  38     friend class WXDLLEXPORT wxMetafile;
  39 public:
  40     wxMetafileRefData();
  41     ~wxMetafileRefData();
  42
  43 public:
  44     WXHANDLE m_metafile;
  45     int m_windowsMappingMode;
  46     int m_width, m_height;
  47 };
  48
  49 #define M_METAFILEDATA ((wxMetafileRefData *)m_refData)
  50
  51 class WXDLLEXPORT wxMetafile: public wxGDIObject
  52 {
  53 public:
  54     wxMetafile(const wxString& file = wxEmptyString);
  55     wxMetafile(const wxMetafile& metafile) { Ref(metafile); }
  56     virtual ~wxMetafile();
  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     bool Ok() const { return (M_METAFILEDATA && (M_METAFILEDATA->m_metafile != 0)); };
  64
  65     // set/get the size of metafile for clipboard operations
  66     wxSize GetSize() const { return wxSize(GetWidth(), GetHeight()); }
  67     int GetWidth() const { return M_METAFILEDATA->m_width; }
  68     int GetHeight() const { return M_METAFILEDATA->m_height; }
  69
  70     void SetWidth(int width) { M_METAFILEDATA->m_width = width; }
  71     void SetHeight(int height) { M_METAFILEDATA->m_height = height; }
  72
  73     // Implementation
  74     WXHANDLE GetHMETAFILE() const { return M_METAFILEDATA->m_metafile; }
  75     void SetHMETAFILE(WXHANDLE mf) ;
  76     int GetWindowsMappingMode() const { return M_METAFILEDATA->m_windowsMappingMode; }
  77     void SetWindowsMappingMode(int mm);
  78
  79     // Operators
  80     wxMetafile& operator=(const wxMetafile& metafile)
  81         { if (*this != metafile) Ref(metafile); return *this; }
  82     bool operator==(const wxMetafile& metafile) const
  83         { return m_refData == metafile.m_refData; }
  84     bool operator!=(const wxMetafile& metafile) const
  85         { return m_refData != metafile.m_refData; }
  86
  87 private:
  88     DECLARE_DYNAMIC_CLASS(wxMetafile)
  89 };
  90
  91 class WXDLLEXPORT wxMetafileDC: public wxDC
  92 {
  93 public:
  94     // Don't supply origin and extent
  95     // Supply them to wxMakeMetaFilePlaceable instead.
  96     wxMetafileDC(const wxString& file = wxEmptyString);
  97
  98     // Supply origin and extent (recommended).
  99     // Then don't need to supply them to wxMakeMetaFilePlaceable.
 100     wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
 101
 102     virtual ~wxMetafileDC();
 103
 104     // Should be called at end of drawing
 105     virtual wxMetafile *Close();
 106     virtual void SetMapMode(int mode);
 107     virtual void GetTextExtent(const wxString& string, long *x, long *y,
 108             long *descent = NULL, long *externalLeading = NULL,
 109             wxFont *theFont = NULL, bool use16bit = FALSE) const;
 110
 111     // Implementation
 112     wxMetafile *GetMetaFile() const { return m_metaFile; }
 113     void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
 114     int GetWindowsMappingMode() const { return m_windowsMappingMode; }
 115     void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
 116
 117 protected:
 118     int           m_windowsMappingMode;
 119     wxMetafile*   m_metaFile;
 120
 121 private:
 122     DECLARE_DYNAMIC_CLASS(wxMetafileDC)
 123 };
 124
 125 /*
 126  * Pass filename of existing non-placeable metafile, and bounding box.
 127  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 128  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 129  *
 130  */
 131
 132 // No origin or extent
 133 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 134
 135 // Optional origin and extent
 136 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = TRUE);
 137
 138 // ----------------------------------------------------------------------------
 139 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 140 // ----------------------------------------------------------------------------
 141
 142 #if wxUSE_DRAG_AND_DROP
 143
 144 class WXDLLEXPORT wxMetafileDataObject : public wxDataObjectSimple
 145 {
 146 public:
 147     // ctors
 148     wxMetafileDataObject() : wxDataObjectSimple(wxDF_METAFILE)
 149         { }
 150     wxMetafileDataObject(const wxMetafile& metafile)
 151         : wxDataObjectSimple(wxDF_METAFILE), m_metafile(metafile) { }
 152
 153     // virtual functions which you may override if you want to provide data on
 154     // demand only - otherwise, the trivial default versions will be used
 155     virtual void SetMetafile(const wxMetafile& metafile)
 156         { m_metafile = metafile; }
 157     virtual wxMetafile GetMetafile() const
 158         { return m_metafile; }
 159
 160     // implement base class pure virtuals
 161     virtual size_t GetDataSize() const;
 162     virtual bool GetDataHere(void *buf) const;
 163     virtual bool SetData(size_t len, const void *buf);
 164
 165 protected:
 166     wxMetafile m_metafile;
 167 };
 168
 169 #endif // wxUSE_DRAG_AND_DROP
 170
 171 #endif // wxUSE_METAFILE
 172 #endif
 173     // _WX_METAFIILE_H_
 174