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listboxorig
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# ------------------------------------------------------------------------------
# listbox.tcl
# This file is part of Unifix BWidget Toolkit
# $Id: listboxorig,v 1.1.1.1 1996/02/22 06:05:56 daniel Exp $
# ------------------------------------------------------------------------------
# Index of commands:
# - ListBox::create
# - ListBox::configure
# - ListBox::cget
# - ListBox::insert
# - ListBox::itemconfigure
# - ListBox::itemcget
# - ListBox::bindText
# - ListBox::bindImage
# - ListBox::delete
# - ListBox::move
# - ListBox::reorder
# - ListBox::selection
# - ListBox::exists
# - ListBox::index
# - ListBox::items
# - ListBox::see
# - ListBox::edit
# - ListBox::xview
# - ListBox::yview
# - ListBox::_update_edit_size
# - ListBox::_destroy
# - ListBox::_see
# - ListBox::_update_scrollregion
# - ListBox::_draw_item
# - ListBox::_redraw_items
# - ListBox::_redraw_selection
# - ListBox::_redraw_listbox
# - ListBox::_redraw_idle
# - ListBox::_resize
# - ListBox::_init_drag_cmd
# - ListBox::_drop_cmd
# - ListBox::_over_cmd
# - ListBox::_auto_scroll
# - ListBox::_scroll
# ------------------------------------------------------------------------------
namespace eval ListBox {
namespace eval Item {
Widget::declare ListBox::Item {
{-indent Int 0 0 {=0}}
{-text String "" 0}
{-font TkResource "" 0 listbox}
{-image TkResource "" 0 label}
{-window String "" 0}
{-fill TkResource black 0 {listbox -foreground}}
{-data String "" 0}
}
}
Widget::tkinclude ListBox canvas :cmd \
remove {-insertwidth -insertbackground -insertborderwidth -insertofftime \
-insertontime -selectborderwidth -closeenough -confine -scrollregion \
-xscrollincrement -yscrollincrement -width -height} \
initialize {-relief sunken -borderwidth 2 -takefocus 1 \
-highlightthickness 1 -width 200}
Widget::declare ListBox {
{-deltax Int 10 0 {=0 ""}}
{-deltay Int 15 0 {=0 ""}}
{-padx Int 20 0 {=0 ""}}
{-background TkResource "" 0 listbox}
{-selectbackground TkResource "" 0 listbox}
{-selectforeground TkResource "" 0 listbox}
{-width TkResource "" 0 listbox}
{-height TkResource "" 0 listbox}
{-redraw Boolean 1 0}
{-multicolumn Boolean 0 0}
{-dropovermode Flag "wpi" 0 "wpi"}
{-bg Synonym -background}
}
DragSite::include ListBox "LISTBOX_ITEM" 1
DropSite::include ListBox {
LISTBOX_ITEM {copy {} move {}}
}
Widget::addmap ListBox "" :cmd {-deltay -yscrollincrement}
proc ::ListBox { path args } { return [eval ListBox::create $path $args] }
proc use {} {}
variable _edit
}
# ------------------------------------------------------------------------------
# Command ListBox::create
# ------------------------------------------------------------------------------
proc ListBox::create { path args } {
Widget::init ListBox $path $args
variable $path
upvar 0 $path data
# widget informations
set data(nrows) -1
# items informations
set data(items) {}
set data(selitems) {}
# update informations
set data(upd,level) 0
set data(upd,afterid) ""
set data(upd,level) 0
set data(upd,delete) {}
# drag and drop informations
set data(dnd,scroll) ""
set data(dnd,afterid) ""
set data(dnd,item) ""
eval canvas $path [Widget::subcget $path :cmd] \
-width [expr {[Widget::getoption $path -width]*8}] \
-height [expr {[Widget::getoption $path -height]*[Widget::getoption $path -deltay]}] \
-xscrollincrement 8
bind $path <Configure> "ListBox::_resize $path"
bind $path <Destroy> "ListBox::_destroy $path"
DragSite::setdrag $path $path ListBox::_init_drag_cmd [Widget::getoption $path -dragendcmd] 1
DropSite::setdrop $path $path ListBox::_over_cmd ListBox::_drop_cmd 1
rename $path ::$path:cmd
proc ::$path { cmd args } "return \[eval ListBox::\$cmd $path \$args\]"
return $path
}
# ------------------------------------------------------------------------------
# Command ListBox::configure
# ------------------------------------------------------------------------------
proc ListBox::configure { path args } {
set res [Widget::configure $path $args]
set ch1 [expr {[Widget::hasChanged $path -deltay dy] |
[Widget::hasChanged $path -padx val] |
[Widget::hasChanged $path -multicolumn val]}]
set ch2 [expr {[Widget::hasChanged $path -selectbackground val] |
[Widget::hasChanged $path -selectforeground val]}]
set redraw 0
if { [Widget::hasChanged $path -height h] } {
$path:cmd configure -height [expr {$h*$dy}]
set redraw 1
}
if { [Widget::hasChanged $path -width w] } {
$path:cmd configure -width [expr {$w*8}]
set redraw 1
}
if { !$redraw } {
if { $ch1 } {
_redraw_idle $path 2
} elseif { $ch2 } {
_redraw_idle $path 1
}
}
if { [Widget::hasChanged $path -redraw bool] && $bool } {
variable $path
upvar 0 $path data
set lvl $data(upd,level)
set data(upd,level) 0
_redraw_idle $path $lvl
}
set force [Widget::hasChanged $path -dragendcmd dragend]
DragSite::setdrag $path $path ListBox::_init_drag_cmd $dragend $force
DropSite::setdrop $path $path ListBox::_over_cmd ListBox::_drop_cmd
return $res
}
# ------------------------------------------------------------------------------
# Command ListBox::cget
# ------------------------------------------------------------------------------
proc ListBox::cget { path option } {
return [Widget::cget $path $option]
}
# ------------------------------------------------------------------------------
# Command ListBox::insert
# ------------------------------------------------------------------------------
proc ListBox::insert { path index item args } {
variable $path
upvar 0 $path data
if { [lsearch $data(items) $item] != -1 } {
return -code error "item \"$item\" already exists"
}
Widget::init ListBox::Item $path.$item $args
if { ![string compare $index "end"] } {
lappend data(items) $item
} else {
set data(items) [linsert $data(items) $index $item]
}
set data(upd,create,$item) $item
_redraw_idle $path 2
return $item
}
# ------------------------------------------------------------------------------
# Command ListBox::itemconfigure
# ------------------------------------------------------------------------------
proc ListBox::itemconfigure { path item args } {
variable $path
upvar 0 $path data
if { [lsearch $data(items) $item] == -1 } {
return -code error "item \"$item\" does not exist"
}
set oldind [Widget::getoption $path.$item -indent]
set res [Widget::configure $path.$item $args]
set chind [Widget::hasChanged $path.$item -indent indent]
set chw [Widget::hasChanged $path.$item -window win]
set chi [Widget::hasChanged $path.$item -image img]
set cht [Widget::hasChanged $path.$item -text txt]
set chf [Widget::hasChanged $path.$item -font fnt]
set chfg [Widget::hasChanged $path.$item -fill fg]
set idn [$path:cmd find withtag n:$item]
if { $idn == "" } {
# item is not drawn yet
_redraw_idle $path 2
return $res
}
set oldb [$path:cmd bbox $idn]
set coords [$path:cmd coords $idn]
set padx [Widget::getoption $path -padx]
set x0 [expr {[lindex $coords 0]-$padx-$oldind+$indent}]
set y0 [lindex $coords 1]
if { $chw || $chi } {
# -window or -image modified
set idi [$path:cmd find withtag i:$item]
set type [lindex [$path:cmd gettags $idi] 0]
if { [string length $win] } {
if { ![string compare $type "win"] } {
$path:cmd itemconfigure $idi -window $win
} else {
$path:cmd delete $idi
$path:cmd create window $x0 $y0 -window $win -anchor w -tags "win i:$item"
}
} elseif { [string length $img] } {
if { ![string compare $type "img"] } {
$path:cmd itemconfigure $idi -image $img
} else {
$path:cmd delete $idi
$path:cmd create image $x0 $y0 -image $img -anchor w -tags "img i:$item"
}
} else {
$path:cmd delete $idi
}
}
if { $cht || $chf || $chfg } {
# -text or -font modified, or -fill modified
$path:cmd itemconfigure $idn -text $txt -font $fnt -fill $fg
_redraw_idle $path 1
}
if { $chind } {
# -indent modified
$path:cmd coords $idn [expr {$x0+$padx}] $y0
$path:cmd coords i:$item $x0 $y0
_redraw_idle $path 1
}
if { [Widget::getoption $path -multicolumn] && ($cht || $chf || $chind) } {
set bbox [$path:cmd bbox $idn]
if { [lindex $bbox 2] > [lindex $oldb 2] } {
_redraw_idle $path 2
}
}
return $res
}
# ------------------------------------------------------------------------------
# Command ListBox::itemcget
# ------------------------------------------------------------------------------
proc ListBox::itemcget { path item option } {
return [Widget::cget $path.$item $option]
}
# ------------------------------------------------------------------------------
# Command ListBox::bindText
# ------------------------------------------------------------------------------
proc ListBox::bindText { path event script } {
if { $script != "" } {
$path:cmd bind "item" $event \
"$script \[string range \[lindex \[$path:cmd gettags current\] 1\] 2 end\]"
} else {
$path:cmd bind "item" $event {}
}
}
# ------------------------------------------------------------------------------
# Command ListBox::bindImage
# ------------------------------------------------------------------------------
proc ListBox::bindImage { path event script } {
if { $script != "" } {
$path:cmd bind "img" $event \
"$script \[string range \[lindex \[$path:cmd gettags current\] 1\] 2 end\]"
} else {
$path:cmd bind "img" $event {}
}
}
# ------------------------------------------------------------------------------
# Command ListBox::delete
# ------------------------------------------------------------------------------
proc ListBox::delete { path args } {
variable $path
upvar 0 $path data
foreach litems $args {
foreach item $litems {
set idx [lsearch $data(items) $item]
if { $idx != -1 } {
set data(items) [lreplace $data(items) $idx $idx]
Widget::destroy $path.$item
if { [info exists data(upd,create,$item)] } {
unset data(upd,create,$item)
} else {
lappend data(upd,delete) $item
}
}
}
}
set sel $data(selitems)
set data(selitems) {}
eval selection $path set $sel
_redraw_idle $path 2
}
# ------------------------------------------------------------------------------
# Command ListBox::move
# ------------------------------------------------------------------------------
proc ListBox::move { path item index } {
variable $path
upvar 0 $path data
if { [set idx [lsearch $data(items) $item]] == -1 } {
return -code error "item \"$item\" does not exist"
}
set data(items) [lreplace $data(items) $idx $idx]
if { ![string compare $index "end"] } {
lappend data($path,item) $item
} else {
set data(items) [linsert $data(items) $index $item]
}
_redraw_idle $path 2
}
# ------------------------------------------------------------------------------
# Command ListBox::reorder
# ------------------------------------------------------------------------------
proc ListBox::reorder { path neworder } {
variable $path
upvar 0 $path data
set data(items) [BWidget::lreorder $data(items) $neworder]
_redraw_idle $path 2
}
# ------------------------------------------------------------------------------
# Command ListBox::selection
# ------------------------------------------------------------------------------
proc ListBox::selection { path cmd args } {
variable $path
upvar 0 $path data
switch -- $cmd {
set {
set data(selitems) {}
foreach item $args {
if { [lsearch $data(selitems) $item] == -1 } {
if { [lsearch $data(items) $item] != -1 } {
lappend data(selitems) $item
}
}
}
}
add {
foreach item $args {
if { [lsearch $data(selitems) $item] == -1 } {
if { [lsearch $data(items) $item] != -1 } {
lappend data(selitems) $item
}
}
}
}
remove {
foreach item $args {
if { [set idx [lsearch $data(selitems) $item]] != -1 } {
set data(selitems) [lreplace $data(selitems) $idx $idx]
}
}
}
clear {
set data(selitems) {}
}
get {
return $data(selitems)
}
default {
return
}
}
_redraw_idle $path 1
}
# ------------------------------------------------------------------------------
# Command ListBox::exists
# ------------------------------------------------------------------------------
proc ListBox::exists { path item } {
variable $path
upvar 0 $path data
return [expr {[lsearch $data(items) $item] != -1}]
}
# ------------------------------------------------------------------------------
# Command ListBox::index
# ------------------------------------------------------------------------------
proc ListBox::index { path item } {
variable $path
upvar 0 $path data
return [lsearch $data(items) $item]
}
proc ListBox::item { path first {last ""} } {
variable $path
upvar 0 $path data
if { ![string length $last] } {
return [lindex $data(items) $first]
} else {
return [lrange $data(items) $first $last]
}
}
# ------------------------------------------------------------------------------
# Command ListBox::items
# ------------------------------------------------------------------------------
proc ListBox::items { path } {
variable $path
upvar 0 $path data
return $data(items)
}
# ------------------------------------------------------------------------------
# Command ListBox::see
# ------------------------------------------------------------------------------
proc ListBox::see { path item } {
set idn [$path:cmd find withtag n:$item]
if { $idn != "" } {
ListBox::_see $path $idn left
}
}
# ------------------------------------------------------------------------------
# Command ListBox::edit
# ------------------------------------------------------------------------------
proc ListBox::edit { path item text {verifycmd ""} {clickres 0} {select 1}} {
variable _edit
set idn [$path:cmd find withtag n:$item]
if { $idn != "" } {
ListBox::_see $path $idn right
ListBox::_see $path $idn left
set oldfg [$path:cmd itemcget $idn -fill]
set sbg [Widget::getoption $path -selectbackground]
set coords [$path:cmd coords $idn]
set x [lindex $coords 0]
set y [lindex $coords 1]
set bd [expr {[$path:cmd cget -borderwidth]+[$path:cmd cget -highlightthickness]}]
set w [expr {[winfo width $path] - 2*$bd}]
set wmax [expr {[$path:cmd canvasx $w]-$x}]
$path:cmd itemconfigure $idn -fill [Widget::getoption $path -background]
$path:cmd itemconfigure s:$item -fill {} -outline {}
set _edit(text) $text
set _edit(wait) 0
set frame [frame $path.edit \
-relief flat -borderwidth 0 -highlightthickness 0 \
-background [Widget::getoption $path -background]]
set ent [entry $frame.edit \
-width 0 \
-relief solid \
-borderwidth 1 \
-highlightthickness 0 \
-foreground [Widget::getoption $path.$item -fill] \
-background [Widget::getoption $path -background] \
-selectforeground [Widget::getoption $path -selectforeground] \
-selectbackground $sbg \
-font [Widget::getoption $path.$item -font] \
-textvariable ListBox::_edit(text)]
pack $ent -ipadx 8 -anchor w
set idw [$path:cmd create window $x $y -window $frame -anchor w]
trace variable ListBox::_edit(text) w "ListBox::_update_edit_size $path $ent $idw $wmax"
tkwait visibility $ent
grab $frame
BWidget::focus set $ent
_update_edit_size $path $ent $idw $wmax
update
if { $select } {
$ent selection from 0
$ent selection to end
$ent icursor end
$ent xview end
}
bind $ent <Escape> {set ListBox::_edit(wait) 0}
bind $ent <Return> {set ListBox::_edit(wait) 1}
if { $clickres == 0 || $clickres == 1 } {
bind $frame <Button> "set ListBox::_edit(wait) $clickres"
}
set ok 0
while { !$ok } {
tkwait variable ListBox::_edit(wait)
if { !$_edit(wait) || $verifycmd == "" ||
[uplevel \#0 $verifycmd [list $_edit(text)]] } {
set ok 1
}
}
trace vdelete ListBox::_edit(text) w "ListBox::_update_edit_size $path $ent $idw $wmax"
grab release $frame
BWidget::focus release $ent
destroy $frame
$path:cmd delete $idw
$path:cmd itemconfigure $idn -fill $oldfg
$path:cmd itemconfigure s:$item -fill $sbg -outline $sbg
if { $_edit(wait) } {
return $_edit(text)
}
}
return ""
}
# ------------------------------------------------------------------------------
# Command ListBox::xview
# ------------------------------------------------------------------------------
proc ListBox::xview { path args } {
return [eval $path:cmd xview $args]
}
# ------------------------------------------------------------------------------
# Command ListBox::yview
# ------------------------------------------------------------------------------
proc ListBox::yview { path args } {
return [eval $path:cmd yview $args]
}
# ------------------------------------------------------------------------------
# Command ListBox::_update_edit_size
# ------------------------------------------------------------------------------
proc ListBox::_update_edit_size { path entry idw wmax args } {
set entw [winfo reqwidth $entry]
if { $entw >= $wmax } {
$path:cmd itemconfigure $idw -width $wmax
} else {
$path:cmd itemconfigure $idw -width 0
}
}
# ------------------------------------------------------------------------------
# Command ListBox::_destroy
# ------------------------------------------------------------------------------
proc ListBox::_destroy { path } {
variable $path
upvar 0 $path data
if { $data(upd,afterid) != "" } {
after cancel $data(upd,afterid)
}
if { $data(dnd,afterid) != "" } {
after cancel $data(dnd,afterid)
}
foreach item $data(items) {
Widget::destroy $path.$item
}
Widget::destroy $path
unset data
rename $path {}
}
# ------------------------------------------------------------------------------
# Command ListBox::_see
# ------------------------------------------------------------------------------
proc ListBox::_see { path idn side } {
set bbox [$path:cmd bbox $idn]
set scrl [$path:cmd cget -scrollregion]
set ymax [lindex $scrl 3]
set dy [$path:cmd cget -yscrollincrement]
set yv [$path:cmd yview]
set yv0 [expr {round([lindex $yv 0]*$ymax/$dy)}]
set yv1 [expr {round([lindex $yv 1]*$ymax/$dy)}]
set y [expr {int([lindex [$path:cmd coords $idn] 1]/$dy)}]
if { $y < $yv0 } {
$path:cmd yview scroll [expr {$y-$yv0}] units
} elseif { $y >= $yv1 } {
$path:cmd yview scroll [expr {$y-$yv1+1}] units
}
set xmax [lindex $scrl 2]
set dx [$path:cmd cget -xscrollincrement]
set xv [$path:cmd xview]
if { ![string compare $side "right"] } {
set xv1 [expr {round([lindex $xv 1]*$xmax/$dx)}]
set x1 [expr {int([lindex $bbox 2]/$dx)}]
if { $x1 >= $xv1 } {
$path:cmd xview scroll [expr {$x1-$xv1+1}] units
}
} else {
set xv0 [expr {round([lindex $xv 0]*$xmax/$dx)}]
set x0 [expr {int([lindex $bbox 0]/$dx)}]
if { $x0 < $xv0 } {
$path:cmd xview scroll [expr {$x0-$xv0}] units
}
}
}
# ------------------------------------------------------------------------------
# Command ListBox::_update_scrollregion
# ------------------------------------------------------------------------------
proc ListBox::_update_scrollregion { path } {
set bd [expr {2*([$path:cmd cget -borderwidth]+[$path:cmd cget -highlightthickness])}]
set w [expr {[winfo width $path] - $bd}]
set h [expr {[winfo height $path] - $bd}]
set xinc [$path:cmd cget -xscrollincrement]
set yinc [$path:cmd cget -yscrollincrement]
set bbox [$path:cmd bbox all]
if { [llength $bbox] } {
set xs [lindex $bbox 2]
set ys [lindex $bbox 3]
if { $w < $xs } {
set w [expr {int($xs)}]
if { [set r [expr {$w % $xinc}]] } {
set w [expr {$w+$xinc-$r}]
}
}
if { $h < $ys } {
set h [expr {int($ys)}]
if { [set r [expr {$h % $yinc}]] } {
set h [expr {$h+$yinc-$r}]
}
}
}
$path:cmd configure -scrollregion [list 0 0 $w $h]
}
# ------------------------------------------------------------------------------
# Command ListBox::_draw_item
# ------------------------------------------------------------------------------
proc ListBox::_draw_item { path item x0 x1 y } {
set indent [Widget::getoption $path.$item -indent]
$path:cmd create text [expr {$x1+$indent}] $y \
-text [Widget::getoption $path.$item -text] \
-fill [Widget::getoption $path.$item -fill] \
-font [Widget::getoption $path.$item -font] \
-anchor w \
-tags "item n:$item"
if { [set win [Widget::getoption $path.$item -window]] != "" } {
$path:cmd create window [expr {$x0+$indent}] $y \
-window $win -anchor w -tags "win i:$item"
} elseif { [set img [Widget::getoption $path.$item -image]] != "" } {
$path:cmd create image [expr {$x0+$indent}] $y \
-image $img -anchor w -tags "img i:$item"
}
}
# ------------------------------------------------------------------------------
# Command ListBox::_redraw_items
# ------------------------------------------------------------------------------
proc ListBox::_redraw_items { path } {
variable $path
upvar 0 $path data
$path:cmd configure -cursor watch
set dx [Widget::getoption $path -deltax]
set dy [Widget::getoption $path -deltay]
set padx [Widget::getoption $path -padx]
set y0 [expr {$dy/2}]
set x0 4
set x1 [expr {$x0+$padx}]
set nitem 0
set drawn {}
set data(xlist) {}
if { [Widget::getoption $path -multicolumn] } {
set nrows $data(nrows)
} else {
set nrows [llength $data(items)]
}
foreach item $data(upd,delete) {
$path:cmd delete i:$item n:$item s:$item
}
foreach item $data(items) {
if { [info exists data(upd,create,$item)] } {
_draw_item $path $item $x0 $x1 $y0
unset data(upd,create,$item)
} else {
set indent [Widget::getoption $path.$item -indent]
$path:cmd coords n:$item [expr {$x1+$indent}] $y0
$path:cmd coords i:$item [expr {$x0+$indent}] $y0
}
incr y0 $dy
incr nitem
lappend drawn n:$item
if { $nitem == $nrows } {
set y0 [expr {$dy/2}]
set bbox [eval $path:cmd bbox $drawn]
set drawn {}
set x0 [expr {[lindex $bbox 2]+$dx}]
set x1 [expr {$x0+$padx}]
set nitem 0
lappend data(xlist) [lindex $bbox 2]
}
}
if { $nitem && $nitem < $nrows } {
set bbox [eval $path:cmd bbox $drawn]
lappend data(xlist) [lindex $bbox 2]
}
set data(upd,delete) {}
$path:cmd configure -cursor [Widget::getoption $path -cursor]
}
# ------------------------------------------------------------------------------
# Command ListBox::_redraw_selection
# ------------------------------------------------------------------------------
proc ListBox::_redraw_selection { path } {
variable $path
upvar 0 $path data
set selbg [Widget::getoption $path -selectbackground]
set selfg [Widget::getoption $path -selectforeground]
foreach id [$path:cmd find withtag sel] {
set item [string range [lindex [$path:cmd gettags $id] 1] 2 end]
$path:cmd itemconfigure "n:$item" -fill [Widget::getoption $path.$item -fill]
}
$path:cmd delete sel
foreach item $data(selitems) {
set bbox [$path:cmd bbox "n:$item"]
if { [llength $bbox] } {
set id [eval $path:cmd create rectangle $bbox -fill $selbg -outline $selbg -tags [list "sel s:$item"]]
$path:cmd itemconfigure "n:$item" -fill $selfg
$path:cmd lower $id
}
}
}
# ------------------------------------------------------------------------------
# Command ListBox::_redraw_listbox
# ------------------------------------------------------------------------------
proc ListBox::_redraw_listbox { path } {
variable $path
upvar 0 $path data
if { [Widget::getoption $path -redraw] } {
if { $data(upd,level) == 2 } {
_redraw_items $path
}
_redraw_selection $path
_update_scrollregion $path
set data(upd,level) 0
set data(upd,afterid) ""
}
}
# ------------------------------------------------------------------------------
# Command ListBox::_redraw_idle
# ------------------------------------------------------------------------------
proc ListBox::_redraw_idle { path level } {
variable $path
upvar 0 $path data
if { $data(nrows) != -1 } {
# widget is realized
if { [Widget::getoption $path -redraw] && $data(upd,afterid) == "" } {
set data(upd,afterid) [after idle ListBox::_redraw_listbox $path]
}
}
if { $level > $data(upd,level) } {
set data(upd,level) $level
}
return ""
}
# ------------------------------------------------------------------------------
# Command ListBox::_resize
# ------------------------------------------------------------------------------
proc ListBox::_resize { path } {
variable $path
upvar 0 $path data
if { [Widget::getoption $path -multicolumn] } {
set bd [expr {[$path:cmd cget -borderwidth]+[$path:cmd cget -highlightthickness]}]
set h [expr {[winfo height $path] - 2*$bd}]
set nrows [expr {$h/[$path:cmd cget -yscrollincrement]}]
if { $nrows == 0 } {
set nrows 1
}
if { $nrows != $data(nrows) } {
set data(nrows) $nrows
_redraw_idle $path 2
} else {
_update_scrollregion $path
}
} elseif { $data(nrows) == -1 } {
# first Configure event
set data(nrows) 0
ListBox::_redraw_listbox $path
} else {
_update_scrollregion $path
}
}
# ------------------------------------------------------------------------------
# Command ListBox::_init_drag_cmd
# ------------------------------------------------------------------------------
proc ListBox::_init_drag_cmd { path X Y top } {
set ltags [$path:cmd gettags current]
set item [lindex $ltags 0]
if { ![string compare $item "item"] ||
![string compare $item "img"] ||
![string compare $item "win"] } {
set item [string range [lindex $ltags 1] 2 end]
if { [set cmd [Widget::getoption $path -draginitcmd]] != "" } {
return [uplevel \#0 $cmd [list $path $item $top]]
}
if { [set type [Widget::getoption $path -dragtype]] == "" } {
set type "LISTBOX_ITEM"
}
if { [set img [Widget::getoption $path.$item -image]] != "" } {
pack [label $top.l -image $img -padx 0 -pady 0]
}
return [list $type {copy move link} $item]
}
return {}
}
# ------------------------------------------------------------------------------
# Command ListBox::_drop_cmd
# ------------------------------------------------------------------------------
proc ListBox::_drop_cmd { path source X Y op type dnddata } {
variable $path
upvar 0 $path data
if { [string length $data(dnd,afterid)] } {
after cancel $data(dnd,afterid)
set data(dnd,afterid) ""
}
$path:cmd delete drop
set data(dnd,scroll) ""
if { [llength $data(dnd,item)] } {
if { [set cmd [Widget::getoption $path -dropcmd]] != "" } {
return [uplevel \#0 $cmd [list $path $source $data(dnd,item) $op $type $dnddata]]
}
}
return 0
}
# ------------------------------------------------------------------------------
# Command ListBox::_over_cmd
# ------------------------------------------------------------------------------
proc ListBox::_over_cmd { path source event X Y op type dnddata } {
variable $path
upvar 0 $path data
if { ![string compare $event "leave"] } {
# we leave the window listbox
$path:cmd delete drop
if { [string length $data(dnd,afterid)] } {
after cancel $data(dnd,afterid)
set data(dnd,afterid) ""
}
set data(dnd,scroll) ""
return 0
}
if { ![string compare $event "enter"] } {
# we enter the window listbox - dnd data initialization
set mode [Widget::getoption $path -dropovermode]
set data(dnd,mode) 0
foreach c {w p i} {
set data(dnd,mode) [expr {($data(dnd,mode) << 1) | ([string first $c $mode] != -1)}]
}
}
set x [expr {$X-[winfo rootx $path]}]
set y [expr {$Y-[winfo rooty $path]}]
$path:cmd delete drop
set data(dnd,item) ""
# test for auto-scroll unless mode is widget only
if { $data(dnd,mode) != 4 && [_auto_scroll $path $x $y] != "" } {
return 2
}
if { $data(dnd,mode) & 4 } {
# dropovermode includes widget
set target [list widget]
set vmode 4
} else {
set target [list ""]
set vmode 0
}
if { $data(dnd,mode) & 3 } {
# dropovermode includes item or position
# we extract the box (xi,yi,xs,ys) where we can find item around x,y
set len [llength $data(items)]
set xc [$path:cmd canvasx $x]
set yc [$path:cmd canvasy $y]
set dy [$path:cmd cget -yscrollincrement]
set line [expr {int($yc/$dy)}]
set yi [expr {$line*$dy}]
set ys [expr {$yi+$dy}]
set xi 0
set pos $line
if { [Widget::getoption $path -multicolumn] } {
set nrows $data(nrows)
} else {
set nrows $len
}
if { $line < $nrows } {
foreach xs $data(xlist) {
if { $xc <= $xs } {
break
}
set xi $xs
incr pos $nrows
}
if { $pos < $len } {
set item [lindex $data(items) $pos]
if { $data(dnd,mode) & 1 } {
# dropovermode includes item
lappend target $item
set vmode [expr {$vmode | 1}]
} else {
lappend target ""
}
if { $data(dnd,mode) & 2 } {
# dropovermode includes position
if { $yc >= $yi+$dy/2 } {
# position is after $item
incr pos
set yl $ys
} else {
# position is before $item
set yl $yi
}
lappend target $pos
set vmode [expr {$vmode | 2}]
} else {
lappend target ""
}
} else {
lappend target "" ""
}
} else {
lappend target "" ""
}
if { ($vmode & 3) == 3 } {
# result have both item and position
# we compute what is the preferred method
if { $yc-$yi <= 3 || $ys-$yc <= 3 } {
lappend target "position"
} else {
lappend target "item"
}
}
}
if { $vmode && [set cmd [Widget::getoption $path -dropovercmd]] != "" } {
# user-defined dropover command
set res [uplevel \#0 $cmd [list $source $target $op $type $dnddata]]
set code [lindex $res 0]
set vmode 0
if { $code & 1 } {
# update vmode
set mode [lindex $res 1]
if { ![string compare $mode "item"] } {
set vmode 1
} elseif { ![string compare $mode "position"] } {
set vmode 2
} elseif { ![string compare $mode "widget"] } {
set vmode 4
}
}
} else {
if { ($vmode & 3) == 3 } {
# result have both item and position
# we choose the preferred method
if { ![string compare [lindex $target 3] "position"] } {
set vmode [expr {$vmode & ~1}]
} else {
set vmode [expr {$vmode & ~2}]
}
}
if { $data(dnd,mode) == 4 || $data(dnd,mode) == 0 } {
# dropovermode is widget or empty - recall is not necessary
set code 1
} else {
set code 3
}
}
# draw dnd visual following vmode
if { $vmode & 1 } {
set data(dnd,item) [list "item" [lindex $target 1]]
$path:cmd create rectangle $xi $yi $xs $ys -tags drop
} elseif { $vmode & 2 } {
set data(dnd,item) [concat "position" [lindex $target 2]]
$path:cmd create line $xi $yl $xs $yl -tags drop
} elseif { $vmode & 4 } {
set data(dnd,item) [list "widget"]
} else {
set code [expr {$code & 2}]
}
if { $code & 1 } {
DropSite::setcursor based_arrow_down
} else {
DropSite::setcursor dot
}
return $code
}
# ------------------------------------------------------------------------------
# Command ListBox::_auto_scroll
# ------------------------------------------------------------------------------
proc ListBox::_auto_scroll { path x y } {
variable $path
upvar 0 $path data
set xmax [winfo width $path]
set ymax [winfo height $path]
set scroll {}
if { $y <= 6 } {
if { [lindex [$path:cmd yview] 0] > 0 } {
set scroll [list yview -1]
DropSite::setcursor sb_up_arrow
}
} elseif { $y >= $ymax-6 } {
if { [lindex [$path:cmd yview] 1] < 1 } {
set scroll [list yview 1]
DropSite::setcursor sb_down_arrow
}
} elseif { $x <= 6 } {
if { [lindex [$path:cmd xview] 0] > 0 } {
set scroll [list xview -1]
DropSite::setcursor sb_left_arrow
}
} elseif { $x >= $xmax-6 } {
if { [lindex [$path:cmd xview] 1] < 1 } {
set scroll [list xview 1]
DropSite::setcursor sb_right_arrow
}
}
if { [string length $data(dnd,afterid)] && [string compare $data(dnd,scroll) $scroll] } {
after cancel $data(dnd,afterid)
set data(dnd,afterid) ""
}
set data(dnd,scroll) $scroll
if { [llength $scroll] && ![string length $data(dnd,afterid)] } {
set data(dnd,afterid) [after 200 ListBox::_scroll $path $scroll]
}
return $data(dnd,afterid)
}
# ------------------------------------------------------------------------------
# Command ListBox::_scroll
# ------------------------------------------------------------------------------
proc ListBox::_scroll { path cmd dir } {
variable $path
upvar 0 $path data
if { ($dir == -1 && [lindex [$path:cmd $cmd] 0] > 0) ||
($dir == 1 && [lindex [$path:cmd $cmd] 1] < 1) } {
$path $cmd scroll $dir units
set data(dnd,afterid) [after 100 ListBox::_scroll $path $cmd $dir]
} else {
set data(dnd,afterid) ""
DropSite::setcursor dot
}
}