Le portail francophone de la géomatique

def __init__(self, iface):
    # Save reference to the QGIS interface
    self.iface = iface

  def initGui(self):  
    # Create action that will start plugin configuration
    self.action = QAction(QIcon(":/plugins/Bio/icon.png"), \
        "Bio", self.iface.mainWindow())
    # connect the action to the run method
    QObject.connect(self.action, SIGNAL("activated()"), self.run) 

    # Add toolbar button and menu item
    self.iface.addToolBarIcon(self.action)
    self.iface.addPluginToMenu("&Bio", self.action)

  def unload(self):
    # Remove the plugin menu item and icon
    self.iface.removePluginMenu("&Bio",self.action)
    self.iface.removeToolBarIcon(self.action)

  # run method that performs all the real work
  def run(self): 
    # create and show the dialog 
    dlg = BioDialog() 
    # show the dialog
    dlg.show()
    result = dlg.exec_() 
    # See if OK was pressed
    if result == 1: 
      # do something useful (delete the line containing pass and
      # substitute with your code
      pass