text: /////////////////////////////////////////////////////////////////////////////
  // Name:        clipbrd.h
  // Purpose:     interface of wxClipboard
  // Author:      wxWidgets team
  // Licence:     wxWindows licence
  /////////////////////////////////////////////////////////////////////////////
  
  /**
      The backwards compatible access macro that returns the global clipboard
      object pointer.
  */
  #define wxTheClipboard
  
  /**
      @class wxClipboard
  
      A class for manipulating the clipboard.
  
      To use the clipboard, you call member functions of the global
      ::wxTheClipboard object.
  
      See the @ref overview_dataobject for further information.
  
      Call wxClipboard::Open() to get ownership of the clipboard. If this
      operation returns @true, you now own the clipboard. Call
      wxClipboard::SetData() to put data on the clipboard, or
      wxClipboard::GetData() to retrieve data from the clipboard. Call
      wxClipboard::Close() to close the clipboard and relinquish ownership. You
      should keep the clipboard open only momentarily.
  
      For example:
  
      @code
      // Write some text to the clipboard
      if (wxTheClipboard->Open())
      {
          // This data objects are held by the clipboard,
          // so do not delete them in the app.
          wxTheClipboard->SetData( new wxTextDataObject("Some text") );
          wxTheClipboard->Close();
      }
  
      // Read some text
      if (wxTheClipboard->Open())
      {
          if (wxTheClipboard->IsSupported( wxDF_TEXT ))
          {
              wxTextDataObject data;
              wxTheClipboard->GetData( data );
              wxMessageBox( data.GetText() );
          }
          wxTheClipboard->Close();
      }
      @endcode
  
      @library{wxcore}
      @category{dnd}
  
      @see @ref overview_dnd, @ref overview_dataobject, wxDataObject
  */
  class wxClipboard : public wxObject
  {
  public:
      /**
          Default constructor.
      */
      wxClipboard();
  
      /**
          Destructor.
      */
      virtual ~wxClipboard();
  
      /**
          Call this function to add the data object to the clipboard.
  
          This is an obsolete synonym for SetData().
      */
      virtual bool AddData(wxDataObject* data);
  
      /**
          Clears the global clipboard object and the system's clipboard if
          possible.
      */
      virtual void Clear();
  
      /**
          Call this function to close the clipboard, having opened it with
          Open().
      */
      virtual void Close();
  
      /**
          Flushes the clipboard: this means that the data which is currently on
          clipboard will stay available even after the application exits
          (possibly eating memory), otherwise the clipboard will be emptied on
          exit.
  
          Currently this method is implemented in MSW and GTK and always returns @false
          otherwise.
  
          @return @false if the operation is unsuccessful for any reason.
      */
      virtual bool Flush();
  
      /**
          Call this function to fill @a data with data on the clipboard, if
          available in the required format. Returns @true on success.
      */
      virtual bool GetData(wxDataObject& data);
  
      /**
          Returns @true if the clipboard has been opened.
      */
      virtual bool IsOpened() const;
  
      /**
          Returns @true if there is data which matches the data format of the
          given data object currently @b available on the clipboard.
  
          @todo The name of this function is misleading. This should be renamed
                to something that more accurately indicates what it does.
      */
      virtual bool IsSupported(const wxDataFormat& format);
  
      /**
          Returns @true if we are using the primary selection, @false if
          clipboard one.
  
          @see UsePrimarySelection()
      */
      bool IsUsingPrimarySelection() const;
  
      /**
          Call this function to open the clipboard before calling SetData() and
          GetData().
  
          Call Close() when you have finished with the clipboard. You should keep
          the clipboard open for only a very short time.
  
          @return @true on success. This should be tested (as in the sample
                  shown above).
      */
      virtual bool Open();
  
      /**
          Call this function to set the data object to the clipboard.
  
          The new data object replaces any previously set one, so if the
          application wants to provide clipboard data in several different
          formats, it must use a composite data object supporting all of the
          formats instead of calling this function several times with different
          data objects as this would only leave data from the last one in the
          clipboard.
  
          After this function has been called, the clipboard owns the data, so do
          not delete the data explicitly.
      */
      virtual bool SetData(wxDataObject* data);
  
      /**
          On platforms supporting it (all X11-based ports), wxClipboard uses the
          CLIPBOARD X11 selection by default. When this function is called with
          @true, all subsequent clipboard operations will use PRIMARY selection
          until this function is called again with @false.
  
          On the other platforms, there is no PRIMARY selection and so all
          clipboard operations will fail. This allows implementing the standard
          X11 handling of the clipboard which consists in copying data to the
          CLIPBOARD selection only when the user explicitly requests it (i.e. by
          selecting the "Copy" menu command) but putting the currently selected
          text into the PRIMARY selection automatically, without overwriting the
          normal clipboard contents with the currently selected text on the other
          platforms.
      */
      virtual void UsePrimarySelection(bool primary = false);
  
      /**
         Returns the global instance (wxTheClipboard) of the clipboard object.
      */
      static wxClipboard *Get();
  
  };
  
  