include/wx/clipbrd.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/clipbrd.h
   3 // Purpose:     wxClipboad class and clipboard functions
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     19.10.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets Team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_CLIPBRD_H_BASE_
  13 #define _WX_CLIPBRD_H_BASE_
  14
  15 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16     #pragma interface "clipboardbase.h"
  17 #endif
  18
  19 #include "wx/defs.h"
  20
  21 #if wxUSE_CLIPBOARD
  22
  23
  24 #include "wx/object.h"
  25 #include "wx/wxchar.h"
  26
  27 class WXDLLEXPORT wxDataFormat;
  28 class WXDLLEXPORT wxDataObject;
  29 class WXDLLEXPORT wxClipboard;
  30
  31 // ----------------------------------------------------------------------------
  32 // wxClipboard represents the system clipboard. Normally, you should use
  33 // wxTheClipboard which is a global pointer to the (unique) clipboard.
  34 //
  35 // Clipboard can be used to copy data to/paste data from. It works together
  36 // with wxDataObject.
  37 // ----------------------------------------------------------------------------
  38
  39 class WXDLLEXPORT wxClipboardBase : public wxObject
  40 {
  41 public:
  42     wxClipboardBase() {}
  43
  44     // open the clipboard before Add/SetData() and GetData()
  45     virtual bool Open() = 0;
  46
  47     // close the clipboard after Add/SetData() and GetData()
  48     virtual void Close() = 0;
  49
  50     // query whether the clipboard is opened
  51     virtual bool IsOpened() const = 0;
  52
  53     // add to the clipboard data
  54     //
  55     // NB: the clipboard owns the pointer and will delete it, so data must be
  56     //     allocated on the heap
  57     virtual bool AddData( wxDataObject *data ) = 0;
  58
  59     // set the clipboard data, this is the same as Clear() followed by
  60     // AddData()
  61     virtual bool SetData( wxDataObject *data ) = 0;
  62
  63     // ask if data in correct format is available
  64     virtual bool IsSupported( const wxDataFormat& format ) = 0;
  65
  66     // fill data with data on the clipboard (if available)
  67     virtual bool GetData( wxDataObject& data ) = 0;
  68
  69     // clears wxTheClipboard and the system's clipboard if possible
  70     virtual void Clear() = 0;
  71
  72     // flushes the clipboard: this means that the data which is currently on
  73     // clipboard will stay available even after the application exits (possibly
  74     // eating memory), otherwise the clipboard will be emptied on exit
  75     virtual bool Flush() { return false; }
  76
  77     // X11 has two clipboards which get selected by this call. Empty on MSW.
  78     virtual void UsePrimarySelection( bool WXUNUSED(primary) = false ) { }
  79
  80     // Returns global instance (wxTheClipboard) of the object:
  81     static wxClipboard *Get();
  82 };
  83
  84 // ----------------------------------------------------------------------------
  85 // globals
  86 // ----------------------------------------------------------------------------
  87
  88 // The global clipboard object - backward compatible access macro:
  89 #define wxTheClipboard   (wxClipboard::Get())
  90
  91 // ----------------------------------------------------------------------------
  92 // include platform-specific class declaration
  93 // ----------------------------------------------------------------------------
  94
  95 #if defined(__WXMSW__)
  96     #include "wx/msw/clipbrd.h"
  97 #elif defined(__WXMOTIF__)
  98     #include "wx/motif/clipbrd.h"
  99 #elif defined(__WXGTK__)
 100     #include "wx/gtk/clipbrd.h"
 101 #elif defined(__WXX11__)
 102     #include "wx/x11/clipbrd.h"
 103 #elif defined(__WXMGL__)
 104     #include "wx/mgl/clipbrd.h"
 105 #elif defined(__WXMAC__)
 106     #include "wx/mac/clipbrd.h"
 107 #elif defined(__WXCOCOA__)
 108     #include "wx/cocoa/clipbrd.h"
 109 #elif defined(__WXPM__)
 110     #include "wx/os2/clipbrd.h"
 111 #endif
 112
 113 // ----------------------------------------------------------------------------
 114 // helpful class for opening the clipboard and automatically closing it
 115 // ----------------------------------------------------------------------------
 116
 117 class WXDLLEXPORT wxClipboardLocker
 118 {
 119 public:
 120     wxClipboardLocker(wxClipboard *clipboard = (wxClipboard *)NULL)
 121     {
 122         m_clipboard = clipboard ? clipboard : wxTheClipboard;
 123         if ( m_clipboard )
 124         {
 125             m_clipboard->Open();
 126         }
 127     }
 128
 129     bool operator!() const { return !m_clipboard->IsOpened(); }
 130
 131     ~wxClipboardLocker()
 132     {
 133         if ( m_clipboard )
 134         {
 135             m_clipboard->Close();
 136         }
 137     }
 138
 139 private:
 140     wxClipboard *m_clipboard;
 141
 142     DECLARE_NO_COPY_CLASS(wxClipboardLocker)
 143 };
 144
 145 #endif // wxUSE_CLIPBOARD
 146
 147 #endif // _WX_CLIPBRD_H_BASE_