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#!/usr/bin/env ruby
# browse --
# This script generates a directory browser, which lists the working
# directory and allow you to open files or subdirectories by
# double-clicking.
require 'tk'
class Browse
BROWSE_WIN_COUNTER = TkVariable.new(0)
def initialize(dir)
BROWSE_WIN_COUNTER.value = BROWSE_WIN_COUNTER.to_i + 1
# create base frame
base = TkToplevel.new {
minsize(1,1)
title('Browse : ' + dir)
}
# Create a scrollbar on the right side of the main window and a listbox
# on the left side.
list = TkListbox.new(base, 'relief'=>'sunken',
'width'=>20, 'height'=>20, 'setgrid'=>'yes') {|l|
TkScrollbar.new(base, 'command'=>proc{|*args| l.yview *args}) {|s|
pack('side'=>'right', 'fill'=>'y')
l.yscrollcommand(proc{|first,last| s.set(first,last)})
}
pack('side'=>'left', 'fill'=>'both', 'expand'=>'yes')
# Fill the listbox with a list of all the files in the directory (run
# the "ls" command to get that information).
open("|ls -a #{dir}", 'r'){|fid| fid.readlines}.each{|fname|
l.insert('end', fname.chomp)
}
}
# Set up bindings for the browser.
base.bind('Destroy', proc{
Browse::BROWSE_WIN_COUNTER.value = \
Browse::BROWSE_WIN_COUNTER.to_i - 1
})
base.bind('Control-c', proc{base.destroy})
list.bind('Double-Button-1',
proc{TkSelection.get.each{|f| self.browse dir, f}})
end
# The method below is invoked to open a browser on a given file; if the
# file is a directory then another instance of this program is invoked; if
# the file is a regular file then the Mx editor is invoked to display
# the file.
def browse (dir, file)
file = dir + File::Separator + file if dir != '.'
type = File.ftype(file)
if type == 'directory'
Browse.new(file)
else
if type == 'file'
if ENV['EDITOR']
system(ENV['EDITOR'] + ' ' + file + ' &')
else
system('xedit ' + file + ' &')
end
else
STDOUT.print "\"#{file}\" isn't a directory or regular file"
end
end
end
end
Browse.new(ARGV[0] ? ARGV[0] : '.')
TkRoot.new {
withdraw
Browse::BROWSE_WIN_COUNTER.trace('w', proc{exit if Browse::BROWSE_WIN_COUNTER.to_i == 0})
}
Tk.mainloop
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