combobox added. also added another example with a combobox.

examples/combobox_example.rb

@@ -0,0 +1,53 @@
+module ComboboxExample
+  require "rubygems"
+  require "rswing"
+
+  include RSwing::Components
+
+  GridBagLayout = java.awt.GridBagLayout
+
+  frame = Frame.new "ComboBox example",
+                    :size => [400,200],
+                    :location => :center do |frame|
+
+    frame.default_close_operation = :exit_on_close
+
+    Panel.new :name => :panel,
+              :belongs_to => frame,
+              :layout_manager => GridBagLayout.new do |panel|
+
+      combobox_items = ["Value 1", "Value 2", "Value 3"]
+      ComboBox.new combobox_items,
+                   :belongs_to => panel,
+                   :name => :combobox
+
+      Button.new  "OK",
+                  :belongs_to => panel,
+                  :name => :ok_button
+
+      Button.new  "Cancel",
+                  :belongs_to => panel,
+                  :name => :cancel_button
+
+    end
+
+    frame.visible = true
+
+  end
+
+  # event handlers
+  panel = frame[:panel]
+
+  panel[:ok_button].on_click do
+    selected_item = panel[:combobox].selected_item
+    Dialog.show "Value selected: #{selected_item}", 
+                :dialog_type => :info, 
+                :title => "You have selected an item.", 
+                :belongs_to => frame
+  end
+
+  panel[:cancel_button].on_click do
+     frame.dispose
+  end
+
+end

lib/rswing.rb

@@ -53,6 +53,7 @@ class Module
 require "window"
 
 require "button"
+require "combo_box"
 require "dialog"
 require "frame"
 require "listener"

lib/rswing/components/combo_box.rb

@@ -0,0 +1,67 @@
+###############################################################################
+# This file is part of RSwing.                                                #
+# RSwing - Swing wrapper for JRuby                                            #
+# (C) 2008 Christopher Bertels (bakkdoor@flasht.de)                           #
+#                                                                             #
+# RSwing is free software: you can redistribute it and/or modify              #
+# it under the terms of the GNU Lesser General Public License as published by #
+# the Free Software Foundation, either version 3 of the License, or           #
+# (at your option) any later version.                                         #
+#                                                                             #
+# RSwing is distributed in the hope that it will be useful,                   #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
+# GNU Lesser General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the GNU Lesser General Public License    #
+# along with RSwing.  If not, see <http://www.gnu.org/licenses/>.             #
+###############################################################################
+
+module RSwing
+  module Components
+    JComboBox = javax.swing.JComboBox
+
+    class ComboBox < JComboBox
+      include Component
+
+      # Valid items are either an array or a ComboBoxModel object.
+      # e.g.: <tt>["First item", "Second item"]</tt> (default: nil)
+      #
+      # Valid options are:
+      # 1. <tt>:belongs_to => container</tt> (default: nil)
+      # 2. <tt>:name => :text_field</tt> (default: nil)
+      def initialize(items = nil, options = {})
+        if(items.kind_of? javax.swing.ComboBoxModel)
+          super(items)
+        elsif(items.kind_of? Array)
+          super(items.to_java(:Object))
+        else
+          super()
+        end
+
+        unless options.empty?
+          Container.add_if_requested(self, options)
+        end
+      end
+
+      # Returns an item at a given index.
+      # Equivalent to ComboBox#item_at
+      def [](item_index)
+        self.item_at(item_index)
+      end
+
+      # Returns the items of this ComboBox as an Array.
+      def items
+        @items = []
+
+        self.item_count.times do |i|
+          @items << self[i]
+        end
+
+        @items
+      end
+
+    end
+
+  end
+end

lib/rswing/components/text_field.rb

@@ -31,6 +31,8 @@ class TextField < JTextField
       # 4. <tt>:font => nil</tt> (default nil)
       # 5. <tt>:visible => false</tt> (default: true)
       # 6. <tt>:editable => false</tt> (default: true)
+      # 7. <tt>:belongs_to => container</tt> (default: nil)
+      # 8. <tt>:name => :text_field</tt> (default: nil)
       def initialize(options = {})
         if(options.empty?)
           super()