JRuby/SWTSnippets/Snippet2.rb

################################################################################
# Copyright (c) 2009 IBM Corporation and others.
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Eclipse Public License v1.0
# which accompanies this distribution, and is available at
# http://www.eclipse.org/legal/epl-v10.html
#
# Contributors:
#     IBM Corporation - initial API and implementation
################################################################################

require 'java'

# 
# Table example snippet: sort a table by column
#
# For a list of SWT example snippets ported to JRuby, see
# http://wiki.eclipse.org/JRuby/SWTSnippets
# 
# @since 3.2
#
class Snippet2
	include_package 'org.eclipse.swt'
	include_package 'org.eclipse.swt.widgets'
	include_package 'org.eclipse.swt.layout'
	include_package 'java.text'
	include_package 'java.util'


	def Snippet2.main
		display = Display.new
		shell = Shell.new(display)
		shell.setLayout(FillLayout.new)
		table = Table.new(shell, SWT::BORDER)
		table.setHeaderVisible(true)
		column1 = TableColumn.new(table, SWT::NONE)
		column1.setText("Column 1")
		column2 = TableColumn.new(table, SWT::NONE)
		column2.setText("Column2 ")
		item = TableItem.new(table, SWT::NONE)
		item.setText(["a", "3"].to_java(:string))
		item = TableItem.new(table, SWT::NONE)
		item.setText(["b", "2"].to_java(:string))
		item = TableItem.new(table, SWT::NONE)
		item.setText(["c", "1"].to_java(:string))
		column1.setWidth(100)
		column2.setWidth(100)
		doSort = Proc.new do |e|
			items = table.getItems
			collator = Collator.getInstance(Locale.getDefault)
			column = e.widget
			index = column == column1 ? 0 : 1
			1.upto(items.length-1) do |i|
				value1 = items[i].getText(index)
				0.upto(i-1) do |j|
					value2 = items[j].getText(index)
					if collator.compare(value1, value2) < 0
						values = [items[i].getText(0), items[i].getText(1)]
						items[i].dispose
						item = TableItem.new(table, SWT::NONE, j)
						item.setText(values.to_java(:string))
						items = table.getItems
						break
					end
				end
			end
		end
		column1.addListener(SWT::Selection) {|e| doSort.call(e) }
		column2.addListener(SWT::Selection) {|e| doSort.call(e) }
		table.setSortColumn(column1)
		table.setSortDirection(SWT::UP)
		shell.setSize(shell.computeSize(SWT::DEFAULT, SWT::DEFAULT).x, 300)
		shell.open
		display.sleep unless display.readAndDispatch until shell.isDisposed
		display.dispose
	end
end

Snippet2.main

Compare with the Java version.