Qt signals driving me crazy

Below is source of basic window with TreeWidget on left and TabWidget on
the right. I stopped here because there is no way I can get
itemActivated() signal to call my nitem_clicked method. I have tried
practically everything I could find on net (there is very little Qt Ruby
examples beyond basics). Current source shows the most complicated
option, that I could have found ;-(

ruby 1.9.3
qtbindings (4.6.3.4)
kubuntu 10.4


by
TheR
-------------------------------------------------

require 'Qt'

class TreeView < Qt::TreeWidget

slots 'nitem_clicked(TreeWidgetItem*, int)'

##############################################
def initialize
  super
  init_ui
end

##############################################
def init_ui
  self.header_hidden = true

  item = Qt::TreeWidgetItem.new
  item.setText(0,'Mongo')
  addTopLevelItem(item)

  item = Qt::TreeWidgetItem.new #Qt::TreeViewItem.new()
  item.setText(0,'++ add new Mongo database')
  addTopLevelItem(item)

  connect(self, SIGNAL('itemActivated( TreeWidgetItem*, int )'), self,
SLOT('nitem_clicked(TreeWidgetItem*, int)'))

end

#############################################
def nitem_clicked(item, column)
  p item.inspect
end

end

##########################################
# Main app
##########################################
class QtApp < Qt::MainWindow
def initialize
  super
  init_ui
  resize 800, 600
  move 300, 300
  show
end

#############################################
def init_ui
  splitter = Qt::Splitter.new
  mongo_tree = TreeView.new
  splitter.addWidget mongo_tree

  mongo_tabs = Qt::TabWidget.new self
  tab = Qt::Widget.new
  mongo_tabs.addTab tab, 'Tab1'

  splitter.addWidget mongo_tabs
  setCentralWidget splitter

  quit = Qt::Action.new "&Quit", self
  file = menuBar.addMenu "&File"
  file.addAction quit

  self.connect(quit, SIGNAL("triggered()"), Qt::Application.instance,
SLOT("quit()"))
end

end

app = Qt::Application.new ARGV
QtApp.new
app.exec

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