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# a simple directory viewer
#
# this program uses a multicolumn listbox (mclistbox) to implement
# a simple directory browser
# substitute your favorite method here...
source mclistbox.tcl
package require mclistbox 1.02
catch {namespace import mclistbox::*}
proc showSelection {args} {
puts "selection has changed: $args"
}
proc main {} {
wm title . "Simple Directory Viewer"
# this lets us be reentrant...
eval destroy [winfo children .]
# we want the listbox and two scrollbars to be embedded in a
frame .container -bd 2 -relief sunken
# frame so they look like a single widget
scrollbar .vsb -orient vertical -command [list .listbox yview]
scrollbar .hsb -orient horizontal -command [list .listbox xview]
# we will purposefully make the width less than the sum of the
# columns so that the scrollbars will be functional right off
# the bat.
mclistbox .listbox \
-bd 0 \
-height 10 \
-width 60 \
-columnrelief flat \
-labelanchor w \
-columnborderwidth 0 \
-selectcommand "showSelection" \
-selectmode extended \
-labelborderwidth 2 \
-fillcolumn name \
-xscrollcommand [list .hsb set] \
-yscrollcommand [list .vsb set]
# add the columns we want to see
.listbox column add name -label "Name" -width 40
.listbox column add size -label "Size" -width 12
.listbox column add mod -label "Last Modified" -width 18
# set up bindings to sort the columns.
.listbox label bind name <ButtonPress-1> "sort %W name"
.listbox label bind size <ButtonPress-1> "sort %W size"
.listbox label bind mod <ButtonPress-1> "sort %W mod"
grid .vsb -in .container -row 0 -column 1 -sticky ns
grid .hsb -in .container -row 1 -column 0 -sticky ew
grid .listbox -in .container -row 0 -column 0 -sticky nsew -padx 0 -pady 0
grid columnconfigure .container 0 -weight 1
grid columnconfigure .container 1 -weight 0
grid rowconfigure .container 0 -weight 1
grid rowconfigure .container 1 -weight 0
pack .container -side top -fill both -expand y
# populate the columns with information about the files in the
# current directory
foreach file [lsort [glob *]] {
if {$file == "." || $file == ".."} continue
set size [set mtime ""]
catch {set mtime [clock format [file mtime $file] -format "%x %X"]}
set size [file size $file]
if {$size > 1048576} {
set size [format "%2.2fMB" [expr $size / 1048576.0]]
} elseif {$size > 1024} {
set size [format "%2.2fKB" [expr $size / 1024.0]]
}
.listbox insert end [list $file $size $mtime]
}
# bind the right click to pop up a context-sensitive menu
# we can use the proc ::mclistbox::convert to convert the
# binding substitutions we need. I've included two examples
# to illustrate. Either method should give identical results. The
# first method is slightly more efficient since it calls the
# conversion routine only once. The second method calls the
# procedure once for each of %W, %x and %y.
# bind .listbox <ButtonPress-3> \
# {eval showContextMenu [::mclistbox::convert %W -W -x %x -y %y] %X %Y}
bind .listbox <ButtonPress-3> \
{showContextMenu \
[::mclistbox::convert %W -W] \
[::mclistbox::convert %W -x %x] \
[::mclistbox::convert %W -y %y] \
%X %Y}
}
# x,y are the coordinates relative to the upper-left corner of the
# listbox; rootx,rooty are screen coordinates (for knowing where
# to place the menu). w is the name of the mclistbox widget that was
# clicked on.
proc showContextMenu {w x y rootx rooty} {
catch {destroy .contextMenu}
menu .contextMenu -tearoff false
# ask the widget for what column this is
set column [$w column nearest $x]
set columnLabel [$w column cget $column -label]
.contextMenu configure -title "$columnLabel"
.contextMenu add command \
-label "Sort by $columnLabel" \
-command [list sort $w $column]
.contextMenu add command \
-label "Hide $columnLabel" \
-command [list $w column configure $column -visible false]
.contextMenu add separator
.contextMenu add command \
-label "Show All Hidden Columns" \
-command "showAllColumns $w"
tk_popup .contextMenu $rootx $rooty
}
proc showAllColumns {w} {
foreach column [$w column names] {
$w column configure $column -visible true
}
}
# sort the list based on a particular column
proc sort {w id} {
set data [$w get 0 end]
set index [lsearch -exact [$w column names] $id]
set result [lsort -index $index $data]
$w delete 0 end
# ... and add our sorted data in
eval $w insert end $result
}
main
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