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# states.rb
#
# This demonstration script creates a listbox widget that displays
# the names of the 50 states in the United States of America.
#
# listbox widget demo 'states' (called by 'widget')
#
# toplevel widget
if defined?($states_demo) && $states_demo
$states_demo.destroy
$states_demo = nil
end
# demo toplevel widget
$states_demo = TkToplevel.new {|w|
title("Listbox Demonstration (states)")
iconname("states")
positionWindow(w)
}
base_frame = TkFrame.new($states_demo).pack(:fill=>:both, :expand=>true)
# label
msg = TkLabel.new(base_frame) {
font $font
wraplength '4i'
justify 'left'
text "A listbox containing the 50 states is displayed below, along with a scrollbar. You can scan the list either using the scrollbar or by scanning. To scan, press button 2 in the widget and drag up or down."
}
msg.pack('side'=>'top')
# frame
TkFrame.new(base_frame) {|frame|
TkButton.new(frame) {
text 'Dismiss'
command proc{
tmppath = $states_demo
$states_demo = nil
tmppath.destroy
}
}.pack('side'=>'left', 'expand'=>'yes')
TkButton.new(frame) {
text 'Show Code'
command proc{showCode 'states'}
}.pack('side'=>'left', 'expand'=>'yes')
}.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')
# frame
states_lbox = nil
TkFrame.new(base_frame, 'borderwidth'=>'.5c') {|w|
s = TkScrollbar.new(w)
states_lbox = TkListbox.new(w) {
setgrid 1
height 12
yscrollcommand proc{|first,last| s.set first,last}
}
s.command(proc{|*args| states_lbox.yview(*args)})
s.pack('side'=>'right', 'fill'=>'y')
states_lbox.pack('side'=>'left', 'expand'=>1, 'fill'=>'both')
}.pack('side'=>'top', 'expand'=>'yes', 'fill'=>'y')
ins_data = [
'Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California',
'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia',
'Hawaii', 'Idaho', 'Illinois',
'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana', 'Maine', 'Maryland',
'Massachusetts', 'Michigan', 'Minnesota', 'Mississippi', 'Missouri',
'Montana', 'Nebraska', 'Nevada', 'New_Hampshire', 'New_Jersey', 'New_Mexico',
'New_York', 'North_Carolina', 'North_Dakota',
'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode_Island',
'South_Carolina', 'South_Dakota',
'Tennessee', 'Texas', 'Utah', 'Vermont', 'Virginia', 'Washington',
'West_Virginia', 'Wisconsin', 'Wyoming'
]
states_lbox.insert(0, *ins_data)
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