clipboard man page on HP-UX

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clipboard(n)		     Tk Built-In Commands		  clipboard(n)


       clipboard - Manipulate Tk clipboard

       clipboard option ?arg arg ...?

       This command provides a Tcl interface to the Tk clipboard, which stores
       data for later retrieval using the selection mechanism (via the -selec‐
       tion  CLIPBOARD	option).   In  order  to copy data into the clipboard,
       clipboard clear must be called, followed by a sequence of one  or  more
       calls  to  clipboard  append.   To ensure that the clipboard is updated
       atomically, all appends should be completed  before  returning  to  the
       event loop.

       The  first  argument  to clipboard determines the format of the rest of
       the arguments and the behavior of the command.  The following forms are
       currently supported:

       clipboard clear ?-displayof window?
	      Claims  ownership	 of  the  clipboard  on	 window's  display and
	      removes any previous contents.  Window defaults to “.”.  Returns
	      an empty string.

       clipboard append ?-displayof window? ?-format format? ?-type type? ?--?
	      Appends data to the clipboard on window's display	 in  the  form
	      given by type with the representation given by format and claims
	      ownership of the clipboard on window's display.

	      Type specifies the form in which the selection is to be returned
	      (the desired “target” for conversion, in ICCCM terminology), and
	      should be an atom name such as  STRING  or  FILE_NAME;  see  the
	      Inter-Client   Communication  Conventions	 Manual	 for  complete
	      details.	Type defaults to STRING.

	      The format argument specifies the representation that should  be
	      used to transmit the selection to the requester (the second col‐
	      umn of Table 2 of the ICCCM), and defaults to STRING.  If format
	      is  STRING,  the selection is transmitted as 8-bit ASCII charac‐
	      ters.  If format is ATOM, then the data is divided  into	fields
	      separated	 by  white  space; each field is converted to its atom
	      value, and the 32-bit atom value is transmitted instead  of  the
	      atom  name.   For any other format,  data is divided into fields
	      separated by white space and each field is converted to a 32-bit
	      integer;	an  array  of integers is transmitted to the selection
	      requester.  Note that strings passed  to	clipboard  append  are
	      concatenated  before conversion, so the caller must take care to
	      ensure appropriate spacing across string boundaries.  All	 items
	      appended	to the clipboard with the same type must have the same

	      The format argument is needed only for compatibility with	 clip‐
	      board requesters that do not use Tk.  If the Tk toolkit is being
	      used to retrieve the CLIPBOARD selection then the value is  con‐
	      verted  back  to	a  string  at the requesting end, so format is

	      A -- argument may be specified to mark the end of options:   the
	      next  argument will always be used as data.  This feature may be
	      convenient if, for example, data starts with a -.

       clipboard get ?-displayof window? ?-type type?
	      Retrieve data from the clipboard on  window's  display.	Window
	      defaults	to  “.”.  Type specifies the form in which the data is
	      to be returned and should be an atom  name  such	as  STRING  or
	      FILE_NAME.  Type defaults to STRING.  This command is equivalent
	      to “selection get -selection CLIPBOARD”.

	      Note that on  modern  X11	 systems,  the	most  useful  type  to
	      retrieve	for  transferred  strings  is  not  STRING, but rather

       Get the current contents of the clipboard.
	      if {[catch {clipboard get} contents]} {
		  # There were no clipboard contents at all

       Set the clipboard to contain a fixed string.
	      clipboard clear
	      clipboard append "some fixed string"

       You can put custom data into the clipboard  by  using  a	 custom	 -type
       option.	This  is not necessarily portable, but can be very useful. The
       method of passing Tcl scripts this way  is  effective,  but  should  be
       mixed with safe interpreters in production code.
	      # This is a very simple canvas serializer;
	      # it produces a script that recreates the item(s) when executed
	      proc getItemConfig {canvas tag} {
		 set script {}
		 foreach item [$canvas find withtag $tag] {
		    append script {$canvas create } [$canvas type $item]
		    append script { } [$canvas coords $item] { }
		    foreach config [$canvas itemconf $item] {
		       lassign $config name - - - value
		       append script [list $name $value] { }
		    append script \n
		 return [string trim $script]

	      # Set up a binding on a canvas to cut and paste an item
	      set c [canvas .c]
	      pack $c
	      $c create text 150 30 -text "cut and paste me"
	      bind $c <<Cut>> {
		 clipboard clear
		 clipboard append -type TkCanvasItem \
		       [getItemConfig %W current]
		 # Delete because this is cut, not copy.
		 %W delete current
	      bind $c <<Paste>> {
		 catch {
		    set canvas %W
		    eval [clipboard get -type TkCanvasItem]

       interp(n), selection(n)

       clear, format, clipboard, append, selection, type

Tk				      8.4			  clipboard(n)

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