include/wx/palmos/metafile.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/palmos/metafile.h
   3 // Purpose:     wxMetaFile, wxMetaFileDC and wxMetaFileDataObject classes
   4 // Author:      William Osborne - minimal working wxPalmOS port
   5 // Modified by:
   6 // Created:     10/13/04
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) William Osborne
   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 WXDLLIMPEXP_CORE 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 WXDLLIMPEXP_CORE 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 WXDLLIMPEXP_CORE wxMetafileDC: public wxDC
  77 {
  78 public:
  79     // Don't supply origin and extent
  80     // Supply them to wxMakeMetaFilePlaceable instead.
  81     wxMetafileDC(const wxString& file = wxEmptyString);
  82
  83     // Supply origin and extent (recommended).
  84     // Then don't need to supply them to wxMakeMetaFilePlaceable.
  85     wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg);
  86
  87     virtual ~wxMetafileDC();
  88
  89     // Should be called at end of drawing
  90     virtual wxMetafile *Close();
  91     virtual void SetMapMode(wxMappingMode mode);
  92     virtual void GetTextExtent(const wxString& string, long *x, long *y,
  93             long *descent = NULL, long *externalLeading = NULL,
  94             const wxFont *theFont = NULL, bool use16bit = FALSE) const;
  95
  96     // Implementation
  97     wxMetafile *GetMetaFile() const { return m_metaFile; }
  98     void SetMetaFile(wxMetafile *mf) { m_metaFile = mf; }
  99     int GetWindowsMappingMode() const { return m_windowsMappingMode; }
 100     void SetWindowsMappingMode(int mm) { m_windowsMappingMode = mm; }
 101
 102 protected:
 103     int           m_windowsMappingMode;
 104     wxMetafile*   m_metaFile;
 105
 106 private:
 107     DECLARE_DYNAMIC_CLASS(wxMetafileDC)
 108 };
 109
 110 /*
 111  * Pass filename of existing non-placeable metafile, and bounding box.
 112  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 113  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 114  *
 115  */
 116
 117 // No origin or extent
 118 bool WXDLLIMPEXP_CORE wxMakeMetafilePlaceable(const wxString& filename, float scale = 1.0);
 119
 120 // Optional origin and extent
 121 bool WXDLLIMPEXP_CORE wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale = 1.0, bool useOriginAndExtent = TRUE);
 122
 123 // ----------------------------------------------------------------------------
 124 // wxMetafileDataObject is a specialization of wxDataObject for metafile data
 125 // ----------------------------------------------------------------------------
 126
 127 #if wxUSE_DRAG_AND_DROP
 128
 129 class WXDLLIMPEXP_CORE wxMetafileDataObject : public wxDataObjectSimple
 130 {
 131 public:
 132     // ctors
 133     wxMetafileDataObject() : wxDataObjectSimple(wxDF_METAFILE)
 134         { }
 135     wxMetafileDataObject(const wxMetafile& metafile)
 136         : wxDataObjectSimple(wxDF_METAFILE), m_metafile(metafile) { }
 137
 138     // virtual functions which you may override if you want to provide data on
 139     // demand only - otherwise, the trivial default versions will be used
 140     virtual void SetMetafile(const wxMetafile& metafile)
 141         { m_metafile = metafile; }
 142     virtual wxMetafile GetMetafile() const
 143         { return m_metafile; }
 144
 145     // implement base class pure virtuals
 146     virtual size_t GetDataSize() const;
 147     virtual bool GetDataHere(void *buf) const;
 148     virtual bool SetData(size_t len, const void *buf);
 149
 150 protected:
 151     wxMetafile m_metafile;
 152 };
 153
 154 #endif // wxUSE_DRAG_AND_DROP
 155
 156 #endif
 157     // _WX_METAFIILE_H_
 158