/usr/lib/blt2.4/dnd.tcl is in blt 2.4z-4.2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# dnd.tcl
#
# ----------------------------------------------------------------------
# Bindings for the BLT drag&drop command
# ----------------------------------------------------------------------
# AUTHOR: George Howlett
# Bell Labs Innovations for Lucent Technologies
# gah@bell-labs.com
# http://www.tcltk.com/blt
# ----------------------------------------------------------------------
# Copyright (c) 1998 Lucent Technologies, Inc.
# ======================================================================
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted,
# provided that the above copyright notice appear in all copies and that
# both that the copyright notice and warranty disclaimer appear in
# supporting documentation, and that the names of Lucent Technologies
# any of their entities not be used in advertising or publicity
# pertaining to distribution of the software without specific, written
# prior permission.
#
# Lucent Technologies disclaims all warranties with regard to this
# software, including all implied warranties of merchantability and
# fitness. In no event shall Lucent be liable for any special, indirect
# or consequential damages or any damages whatsoever resulting from loss
# of use, data or profits, whether in an action of contract, negligence
# or other tortuous action, arising out of or in connection with the use
# or performance of this software.
#
# ======================================================================
if { $tcl_version >= 8.0 } {
set cmd blt::dnd
} else {
set cmd dnd
}
for { set i 1 } { $i <= 5 } { incr i } {
bind BltDndButton$i <ButtonPress-$i> [list $cmd select %W %X %Y %t]
bind BltDndButton$i <B$i-Motion> [list $cmd drag %W %X %Y]
bind BltDndButton$i <ButtonRelease-$i> [list $cmd drop %W %X %Y]
}
# ----------------------------------------------------------------------
#
# DndInit --
#
# Invoked from C whenever a new drag&drop source is created.
# Sets up the default bindings for the drag&drop source.
#
# <ButtonPress-?> Starts the drag operation.
# <B?-Motion> Updates the drag.
# <ButtonRelease-?> Drop the data on the target.
#
# Arguments:
# widget source widget
# button Mouse button used to activate drag.
# cmd "dragdrop" or "blt::dragdrop"
#
# ----------------------------------------------------------------------
proc blt::DndInit { widget button } {
set tagList {}
if { $button > 0 } {
lappend tagList BltDndButton$button
}
foreach tag [bindtags $widget] {
if { ![string match BltDndButton* $tag] } {
lappend tagList $tag
}
}
bindtags $widget $tagList
}
proc blt::DndStdDrop { widget args } {
array set info $args
set fmt [lindex $info(formats) 0]
dnd pull $widget $fmt
return 0
}
proc blt::PrintInfo { array } {
upvar $array state
parray state
if { $info(state) & 0x01 } {
puts "Shift-Drop"
}
if { $info(state) & 0x02 } {
puts "CapsLock-Drop"
}
if { $info(state) & 0x04 } {
puts "Control-Drop"
}
if { $info(state) & 0x08 } {
puts "Alt-Drop"
}
if { $info(state) & 0x10 } {
puts "NumLock-Drop"
}
}
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