include/wx/msw/metafile.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        metafile.h
   3 // Purpose:     wxMetaFile, wxMetaFileDC classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12
  13 #ifndef _WX_METAFIILE_H_
  14 #define _WX_METAFIILE_H_
  15
  16 #ifdef __GNUG__
  17 #pragma interface "metafile.h"
  18 #endif
  19
  20 #include "wx/setup.h"
  21
  22 #if USE_METAFILE
  23 #include "wx/dc.h"
  24
  25 /*
  26  * Metafile and metafile device context classes - work in Windows 3.1 only
  27  *
  28  */
  29
  30 class WXDLLEXPORT wxDC;
  31 class WXDLLEXPORT wxMetaFile: public wxObject
  32 {
  33   DECLARE_DYNAMIC_CLASS(wxMetaFile)
  34  public:
  35   wxMetaFile(const wxString& file = "");
  36   ~wxMetaFile(void);
  37
  38   // After this is called, the metafile cannot be used for anything
  39   // since it is now owned by the clipboard.
  40   virtual bool SetClipboard(int width = 0, int height = 0);
  41
  42   virtual bool Play(wxDC *dc);
  43   inline bool Ok(void) { return m_metaFile != 0; };
  44
  45   // Implementation
  46   inline WXHANDLE GetHMETAFILE(void) { return m_metaFile; }
  47   inline void SetHMETAFILE(WXHANDLE mf) { m_metaFile = mf; }
  48   inline int GetWindowsMappingMode(void) { return m_windowsMappingMode; }
  49   inline void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
  50
  51 protected:
  52   WXHANDLE m_metaFile;
  53   int m_windowsMappingMode;
  54 };
  55
  56 class WXDLLEXPORT wxMetaFileDC: public wxDC
  57 {
  58   DECLARE_DYNAMIC_CLASS(wxMetaFileDC)
  59
  60  public:
  61   // Don't supply origin and extent
  62   // Supply them to wxMakeMetaFilePlaceable instead.
  63   wxMetaFileDC(const wxString& file = "");
  64
  65   // Supply origin and extent (recommended).
  66   // Then don't need to supply them to wxMakeMetaFilePlaceable.
  67   wxMetaFileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
  68
  69   ~wxMetaFileDC(void);
  70
  71   // Should be called at end of drawing
  72   virtual wxMetaFile *Close(void);
  73   virtual void SetMapMode(int mode);
  74   virtual void GetTextExtent(const wxString& string, float *x, float *y,
  75                      float *descent = NULL, float *externalLeading = NULL,
  76                      wxFont *theFont = NULL, bool use16bit = FALSE);
  77
  78   // Implementation
  79   inline wxMetaFile *GetMetaFile(void) { return m_metaFile; }
  80   inline void SetMetaFile(wxMetaFile *mf) { m_metaFile = mf; }
  81   inline int GetWindowsMappingMode(void) { return m_windowsMappingMode; }
  82   inline void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
  83
  84 protected:
  85   int m_windowsMappingMode;
  86   wxMetaFile *m_metaFile;
  87 };
  88
  89 /*
  90  * Pass filename of existing non-placeable metafile, and bounding box.
  91  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
  92  * and sets the window origin and extent to mimic the MM_TEXT mapping mode.
  93  *
  94  */
  95
  96 // No origin or extent
  97 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, float scale = 1.0);
  98
  99 // Optional origin and extent
 100 bool WXDLLEXPORT wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = TRUE);
 101
 102 #endif // USE_METAFILE
 103 #endif
 104     // _WX_METAFIILE_H_