166 lines
3.9 KiB
Tcl
166 lines
3.9 KiB
Tcl
# -*- mode: TCL; fill-column: 75; tab-width: 8; coding: iso-latin-1-unix -*-
|
|
#
|
|
# $Id: DragDrop.tcl,v 1.4 2001/12/09 05:04:02 idiscovery Exp $
|
|
#
|
|
# DragDrop.tcl ---
|
|
#
|
|
# Implements drag+drop for Tix widgets.
|
|
#
|
|
# Copyright (c) 1993-1999 Ioi Kim Lam.
|
|
# Copyright (c) 2000-2001 Tix Project Group.
|
|
#
|
|
# See the file "license.terms" for information on usage and redistribution
|
|
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
|
#
|
|
|
|
tixClass tixDragDropContext {
|
|
-superclass {}
|
|
-classname TixDragDropContext
|
|
-method {
|
|
cget configure drag drop set startdrag
|
|
}
|
|
-flag {
|
|
-command -source
|
|
}
|
|
-configspec {
|
|
{-command ""}
|
|
{-source ""}
|
|
}
|
|
}
|
|
|
|
proc tixDragDropContext:Constructor {w} {
|
|
upvar #0 $w data
|
|
}
|
|
|
|
#----------------------------------------------------------------------
|
|
# Private methods
|
|
#
|
|
#----------------------------------------------------------------------
|
|
proc tixDragDropContext:CallCommand {w target command X Y} {
|
|
upvar #0 $w data
|
|
|
|
set x [expr $X-[winfo rootx $target]]
|
|
set y [expr $Y-[winfo rooty $target]]
|
|
|
|
regsub %x $command $x command
|
|
regsub %y $command $y command
|
|
regsub %X $command $X command
|
|
regsub %Y $command $Y command
|
|
regsub %W $command $target command
|
|
regsub %S $command [list $data(-command)] command
|
|
|
|
eval $command
|
|
}
|
|
|
|
proc tixDragDropContext:Send {w target event X Y} {
|
|
upvar #0 $w data
|
|
global tixDrop
|
|
|
|
foreach tag [tixDropBindTags $target] {
|
|
if {[info exists tixDrop($tag,$event)]} {
|
|
tixDragDropContext:CallCommand $w $target \
|
|
$tixDrop($tag,$event) $X $Y
|
|
}
|
|
}
|
|
}
|
|
|
|
#----------------------------------------------------------------------
|
|
# set --
|
|
#
|
|
# Set the "small data" of the type supported by the source widget
|
|
#----------------------------------------------------------------------
|
|
|
|
proc tixDragDropContext:set {w type data} {
|
|
|
|
}
|
|
|
|
#----------------------------------------------------------------------
|
|
# startdrag --
|
|
#
|
|
# Start the dragging action
|
|
#----------------------------------------------------------------------
|
|
proc tixDragDropContext:startdrag {w x y} {
|
|
upvar #0 $w data
|
|
|
|
set data(oldTarget) ""
|
|
|
|
$data(-source) config -cursor "[tix getbitmap drop] black"
|
|
tixDragDropContext:drag $w $x $y
|
|
}
|
|
|
|
#----------------------------------------------------------------------
|
|
# drag --
|
|
#
|
|
# Continue the dragging action
|
|
#----------------------------------------------------------------------
|
|
proc tixDragDropContext:drag {w X Y} {
|
|
upvar #0 $w data
|
|
global tixDrop
|
|
|
|
set target [winfo containing -displayof $w $X $Y]
|
|
|
|
if {$target != $data(oldTarget)} {
|
|
if {$data(oldTarget) != ""} {
|
|
tixDragDropContext:Send $w $data(oldTarget) <Out> $X $Y
|
|
}
|
|
if {$target != ""} {
|
|
tixDragDropContext:Send $w $target <In> $X $Y
|
|
}
|
|
set data(oldTarget) $target
|
|
}
|
|
if {$target != ""} {
|
|
tixDragDropContext:Send $w $target <Over> $X $Y
|
|
}
|
|
}
|
|
|
|
proc tixDragDropContext:drop {w X Y} {
|
|
upvar #0 $w data
|
|
global tixDrop
|
|
|
|
set target [winfo containing -displayof $w $X $Y]
|
|
if {$target != ""} {
|
|
tixDragDropContext:Send $w $target <Drop> $X $Y
|
|
}
|
|
|
|
if {$data(-source) != ""} {
|
|
$data(-source) config -cursor ""
|
|
}
|
|
set data(-source) ""
|
|
}
|
|
|
|
#----------------------------------------------------------------------
|
|
# Public Procedures -- This is NOT a member of the tixDragDropContext
|
|
# class!
|
|
#
|
|
# parameters :
|
|
# $w: who wants to start dragging? (currently ignored)
|
|
#----------------------------------------------------------------------
|
|
proc tixGetDragDropContext {w} {
|
|
global tixDD
|
|
if {[info exists tixDD]} {
|
|
return tixDD
|
|
}
|
|
|
|
return [tixDragDropContext tixDD]
|
|
}
|
|
|
|
proc tixDropBind {w event command} {
|
|
global tixDrop
|
|
|
|
set tixDrop($w) 1
|
|
set tixDrop($w,$event) $command
|
|
}
|
|
|
|
proc tixDropBindTags {w args} {
|
|
global tixDropTags
|
|
|
|
if {$args == ""} {
|
|
if {[info exists tixDropTags($w)]} {
|
|
return $tixDropTags($w)
|
|
} else {
|
|
return [list [winfo class $w] $w]
|
|
}
|
|
} else {
|
|
set tixDropTags($w) $args
|
|
}
|
|
}
|