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# mclist.rb --
#
# This demonstration script creates a toplevel window containing a Ttk
# tree widget configured as a multi-column listbox.
#
# based on "Id: mclist.tcl,v 1.3 2007/12/13 15:27:07 dgp Exp"
if defined?($mclist_demo) && $mclist_demo
$mclist_demo.destroy
$mclist_demo = nil
end
$mclist_demo = TkToplevel.new {|w|
title("Multi-Column List")
iconname("mclist")
positionWindow(w)
}
base_frame = TkFrame.new($mclist_demo).pack(:fill=>:both, :expand=>true)
## Explanatory text
Ttk::Label.new(base_frame, :font=>$font, :wraplength=>'4i',
:justify=>:left, :anchor=>'n', :padding=>[10, 2, 10, 6],
:text=><<EOL).pack(:fill=>:x)
Ttk is the new Tk themed widget set. \
One of the widgets it includes is a tree widget, \
which can be configured to display multiple columns of informational data \
without displaying the tree itself. \
This is a simple way to build a listbox that has multiple columns. \
Clicking on the heading for a column will sort the data by that column. \
You can also change the width of the columns \
by dragging the boundary between them.
EOL
## See Code / Dismiss
Ttk::Frame.new(base_frame) {|frame|
sep = Ttk::Separator.new(frame)
Tk.grid(sep, :columnspan=>4, :row=>0, :sticky=>'ew', :pady=>2)
TkGrid('x',
Ttk::Button.new(frame, :text=>'See Code',
:image=>$image['view'], :compound=>:left,
:command=>proc{showCode 'mclist'}),
Ttk::Button.new(frame, :text=>'Dismiss',
:image=>$image['delete'], :compound=>:left,
:command=>proc{
$mclist_demo.destroy
$mclist_demo = nil
}),
:padx=>4, :pady=>4)
grid_columnconfigure(0, :weight=>1)
pack(:side=>:bottom, :fill=>:x)
}
container = Ttk::Frame.new(base_frame)
tree = Ttk::Treeview.new(base_frame, :columns=>%w(country capital currency),
:show=>:headings)
if Tk.windowingsystem != 'aqua'
vsb = tree.yscrollbar(Ttk::Scrollbar.new(base_frame))
hsb = tree.xscrollbar(Ttk::Scrollbar.new(base_frame))
else
vsb = tree.yscrollbar(Tk::Scrollbar.new(base_frame))
hsb = tree.xscrollbar(Tk::Scrollbar.new(base_frame))
end
container.pack(:fill=>:both, :expand=>true)
Tk.grid(tree, vsb, :in=>container, :sticky=>'nsew')
Tk.grid(hsb, :in=>container, :sticky=>'nsew')
container.grid_columnconfigure(0, :weight=>1)
container.grid_rowconfigure(0, :weight=>1)
## The data we're going to insert
data = [
['Argentina', 'Buenos Aires', 'ARS'],
['Australia', 'Canberra', 'AUD'],
['Brazil', 'Brazilia', 'BRL'],
['Canada', 'Ottawa', 'CAD'],
['China', 'Beijing', 'CNY'],
['France', 'Paris', 'EUR'],
['Germany', 'Berlin', 'EUR'],
['India', 'New Delhi', 'INR'],
['Italy', 'Rome', 'EUR'],
['Japan', 'Tokyo', 'JPY'],
['Mexico', 'Mexico City', 'MXN'],
['Russia', 'Moscow', 'RUB'],
['South Africa', 'Pretoria', 'ZAR'],
['United Kingdom', 'London', 'GBP'],
['United States', 'Washington, D.C.', 'USD'],
]
## Code to insert the data nicely
font = Ttk::Style.lookup(tree[:style], :font)
cols = %w(country capital currency)
cols.zip(%w(Country Capital Currency)).each{|col, name|
tree.heading_configure(col, :text=>name,
:command=>proc{sort_by(tree, col, false)})
tree.column_configure(col, :width=>TkFont.measure(font, name))
}
data.each{|country, capital, currency|
#tree.insert('', :end, :values=>[country, capital, currency])
tree.insert(nil, :end, :values=>[country, capital, currency])
cols.zip([country, capital, currency]).each{|col, val|
len = TkFont.measure(font, "#{val} ")
if tree.column_cget(col, :width) < len
tree.column_configure(col, :width=>len)
end
}
}
## Code to do the sorting of the tree contents when clicked on
def sort_by(tree, col, direction)
tree.children(nil).map!{|row| [tree.get(row, col), row.id]} .
sort(&((direction)? proc{|x, y| y <=> x}: proc{|x, y| x <=> y})) .
each_with_index{|info, idx| tree.move(info[1], nil, idx)}
tree.heading_configure(col, :command=>proc{sort_by(tree, col, ! direction)})
end
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