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 WXDLLEXPORT wxMetafile;
  27
  28 class WXDLLEXPORT wxMetafileRefData: public wxGDIRefData
  29 {
  30     friend class WXDLLEXPORT wxMetafile;
  31 public:
  32     wxMetafileRefData();
  33     ~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 (M_METAFILEDATA && (M_METAFILEDATA->m_metafile != 0)); };
  55
  56     // set/get the size of metafile for clipboard operations
  57     wxSize GetSize() const { return wxSize(GetWidth(), GetHeight()); }
  58     int GetWidth() const { return M_METAFILEDATA->m_width; }
  59     int GetHeight() const { return M_METAFILEDATA->m_height; }
  60
  61     void SetWidth(int width) { M_METAFILEDATA->m_width = width; }
  62     void SetHeight(int height) { M_METAFILEDATA->m_height = height; }
  63
  64     // Implementation
  65     WXHANDLE GetHMETAFILE() const { return M_METAFILEDATA->m_metafile; }
  66     void SetHMETAFILE(WXHANDLE mf) ;
  67     int GetWindowsMappingMode() const { return M_METAFILEDATA->m_windowsMappingMode; }
  68     void SetWindowsMappingMode(int mm);
  69
  70     // Operators
  71     bool operator==(const wxMetafile& metafile) const
  72         { return m_refData == metafile.m_refData; }
  73     bool operator!=(const wxMetafile& metafile) const
  74         { return m_refData != metafile.m_refData; }
  75
  76 private:
  77     DECLARE_DYNAMIC_CLASS(wxMetafile)
  78 };
  79
  80 class WXDLLEXPORT wxMetafileDC: public wxDC
  81 {
  82 public:
  83     // Don't supply origin and extent
  84     // Supply them to wxMakeMetaFilePlaceable instead.
  85     wxMetafileDC(const wxString& file = wxEmptyString);
  86
  87     // Supply origin and extent (recommended).
  88     // Then don't need to supply them to wxMakeMetaFilePlaceable.
  89     wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
  90
  91     virtual ~wxMetafileDC();
  92
  93     // Should be called at end of drawing
  94     virtual wxMetafile *Close();
  95     virtual void SetMapMode(int mode);
  96     virtual void GetTextExtent(const wxString& string, long *x, long *y,
  97             long *descent = NULL, long *externalLeading = NULL,
  98             wxFont *theFont = NULL, bool use16bit = false) const;
  99
 100     // Implementation
 101     wxMetafile *GetMetaFile() const { return m_metaFile; }
 102     void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
 103     int GetWindowsMappingMode() const { return m_windowsMappingMode; }
 104     void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
 105
 106 protected:
 107     virtual void DoGetSize(int *width, int *height) const;
 108
 109     int           m_windowsMappingMode;
 110     wxMetafile*   m_metaFile;
 111
 112 private:
 113     DECLARE_DYNAMIC_CLASS(wxMetafileDC)
 114 };
 115
 116 /*
 117  * Pass filename of existing non-placeable metafile, and bounding box.
 118  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 119  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 120  *
 121  */
 122
 123 // No origin or extent
 124 bool WXDLLEXPORT wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 125
 126 // Optional origin and extent
 127 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = true);
 128
 129 // ----------------------------------------------------------------------------
 130 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 131 // ----------------------------------------------------------------------------
 132
 133 #if wxUSE_DRAG_AND_DROP
 134
 135 class WXDLLEXPORT wxMetafileDataObject : public wxDataObjectSimple
 136 {
 137 public:
 138     // ctors
 139     wxMetafileDataObject() : wxDataObjectSimple(wxDF_METAFILE)
 140         { }
 141     wxMetafileDataObject(const wxMetafile& metafile)
 142         : wxDataObjectSimple(wxDF_METAFILE), m_metafile(metafile) { }
 143
 144     // virtual functions which you may override if you want to provide data on
 145     // demand only - otherwise, the trivial default versions will be used
 146     virtual void SetMetafile(const wxMetafile& metafile)
 147         { m_metafile = metafile; }
 148     virtual wxMetafile GetMetafile() const
 149         { return m_metafile; }
 150
 151     // implement base class pure virtuals
 152     virtual size_t GetDataSize() const;
 153     virtual bool GetDataHere(void *buf) const;
 154     virtual bool SetData(size_t len, const void *buf);
 155
 156 protected:
 157     wxMetafile m_metafile;
 158 };
 159
 160 #endif // wxUSE_DRAG_AND_DROP
 161
 162 #endif
 163     // _WX_METAFIILE_H_
 164