TIP #370: EXTEND TK'S SELECTION WITH A -TIME OPTION 
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 Version:      $Revision: 1.3 $
 Author:       George Petasis <petasis_at_iit.demokritos.gr>
 State:        Draft
 Type:         Project
 Tcl-Version:  8.7
 Vote:         Pending
 Created:      Wednesday, 04 August 2010
 URL:          https://tip.tcl-lang.org370.html
 Post-History: 

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 ABSTRACT 
==========

 This TIP proposes the addition of a new argument to the Tk command 
 *selection*, for specifying a timestamp that should be used in order to 
 retrieve a selection. 

 RATIONALE 
===========

 TkDND 2.x always used the *selection* command to retrieve data from the 
 clipboard, and worked until recently. The problem seems to be that the 
 selection Tk command always uses "/CurrentTime/" while retrieving the 
 selection, while the XDND protocol specifies that a specific timestamp 
 should be used. 

 I see that in Tk sources (/unix/tkUnixSelect.c/, line 178, the call to 
 /XConvertSelection/) there is already some discussion in the comments 
 which timestamp should be used. The "/CurrentTime/" seems a good 
 choice, but why not offer the ability to provide a timestamp if needed? 

 PROPOSED CHANGE 
=================

 Add a new option to *selection get*. Something like this: 

       *selection get* ?*-displayof* /window/? ?*-selection* 
       /selection/? ?*-type* /type/? ?*-time* /time/? 

 The /time/ value will be an integer, the same as in the *-time* option 
 to *event generate* and as produced by the *%t* substitution in *bind*. 

 COPYRIGHT 
===========

 This document has been placed in the public domain. 

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