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 #include "wx/defs.h"
  16
  17 #if wxUSE_CLIPBOARD
  18
  19
  20 #include "wx/object.h"
  21 #include "wx/chartype.h"
  22
  23 class WXDLLIMPEXP_FWD_CORE wxDataFormat;
  24 class WXDLLIMPEXP_FWD_CORE wxDataObject;
  25 class WXDLLIMPEXP_FWD_CORE wxClipboard;
  26
  27 // ----------------------------------------------------------------------------
  28 // wxClipboard represents the system clipboard. Normally, you should use
  29 // wxTheClipboard which is a global pointer to the (unique) clipboard.
  30 //
  31 // Clipboard can be used to copy data to/paste data from. It works together
  32 // with wxDataObject.
  33 // ----------------------------------------------------------------------------
  34
  35 class WXDLLIMPEXP_CORE wxClipboardBase : public wxObject
  36 {
  37 public:
  38     wxClipboardBase() { m_usePrimary = false; }
  39
  40     // open the clipboard before Add/SetData() and GetData()
  41     virtual bool Open() = 0;
  42
  43     // close the clipboard after Add/SetData() and GetData()
  44     virtual void Close() = 0;
  45
  46     // query whether the clipboard is opened
  47     virtual bool IsOpened() const = 0;
  48
  49     // add to the clipboard data
  50     //
  51     // NB: the clipboard owns the pointer and will delete it, so data must be
  52     //     allocated on the heap
  53     virtual bool AddData( wxDataObject *data ) = 0;
  54
  55     // set the clipboard data, this is the same as Clear() followed by
  56     // AddData()
  57     virtual bool SetData( wxDataObject *data ) = 0;
  58
  59     // ask if data in correct format is available
  60     virtual bool IsSupported( const wxDataFormat& format ) = 0;
  61
  62     // fill data with data on the clipboard (if available)
  63     virtual bool GetData( wxDataObject& data ) = 0;
  64
  65     // clears wxTheClipboard and the system's clipboard if possible
  66     virtual void Clear() = 0;
  67
  68     // flushes the clipboard: this means that the data which is currently on
  69     // clipboard will stay available even after the application exits (possibly
  70     // eating memory), otherwise the clipboard will be emptied on exit
  71     virtual bool Flush() { return false; }
  72
  73     // this allows to choose whether we work with CLIPBOARD (default) or
  74     // PRIMARY selection on X11-based systems
  75     //
  76     // on the other ones, working with primary selection does nothing: this
  77     // allows to write code which sets the primary selection when something is
  78     // selected without any ill effects (i.e. without overwriting the
  79     // clipboard which would be wrong on the platforms without X11 PRIMARY)
  80     virtual void UsePrimarySelection(bool usePrimary = false)
  81     {
  82         m_usePrimary = usePrimary;
  83     }
  84
  85     // return true if we're using primary selection
  86     bool IsUsingPrimarySelection() const { return m_usePrimary; }
  87
  88     // Returns global instance (wxTheClipboard) of the object:
  89     static wxClipboard *Get();
  90
  91
  92     // don't use this directly, it is public for compatibility with some ports
  93     // (wxX11, wxMotif, ...) only
  94     bool m_usePrimary;
  95 };
  96
  97 // ----------------------------------------------------------------------------
  98 // globals
  99 // ----------------------------------------------------------------------------
 100
 101 // The global clipboard object - backward compatible access macro:
 102 #define wxTheClipboard   (wxClipboard::Get())
 103
 104 // ----------------------------------------------------------------------------
 105 // include platform-specific class declaration
 106 // ----------------------------------------------------------------------------
 107
 108 #if defined(__WXMSW__)
 109     #include "wx/msw/clipbrd.h"
 110 #elif defined(__WXMOTIF__)
 111     #include "wx/motif/clipbrd.h"
 112 #elif defined(__WXGTK20__)
 113     #include "wx/gtk/clipbrd.h"
 114 #elif defined(__WXGTK__)
 115     #include "wx/gtk1/clipbrd.h"
 116 #elif defined(__WXX11__)
 117     #include "wx/x11/clipbrd.h"
 118 #elif defined(__WXMGL__)
 119     #include "wx/mgl/clipbrd.h"
 120 #elif defined(__WXMAC__)
 121     #include "wx/mac/clipbrd.h"
 122 #elif defined(__WXCOCOA__)
 123     #include "wx/cocoa/clipbrd.h"
 124 #elif defined(__WXPM__)
 125     #include "wx/os2/clipbrd.h"
 126 #endif
 127
 128 // ----------------------------------------------------------------------------
 129 // helpful class for opening the clipboard and automatically closing it
 130 // ----------------------------------------------------------------------------
 131
 132 class WXDLLIMPEXP_CORE wxClipboardLocker
 133 {
 134 public:
 135     wxClipboardLocker(wxClipboard *clipboard = (wxClipboard *)NULL)
 136     {
 137         m_clipboard = clipboard ? clipboard : wxTheClipboard;
 138         if ( m_clipboard )
 139         {
 140             m_clipboard->Open();
 141         }
 142     }
 143
 144     bool operator!() const { return !m_clipboard->IsOpened(); }
 145
 146     ~wxClipboardLocker()
 147     {
 148         if ( m_clipboard )
 149         {
 150             m_clipboard->Close();
 151         }
 152     }
 153
 154 private:
 155     wxClipboard *m_clipboard;
 156
 157     DECLARE_NO_COPY_CLASS(wxClipboardLocker)
 158 };
 159
 160 #endif // wxUSE_CLIPBOARD
 161
 162 #endif // _WX_CLIPBRD_H_BASE_