Python-сообщество

# Import the PyQt and QGIS libraries
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qgis.core import *


# Initialize Qt resources from file resources_rc.py
import resources_rc

# Import required modules and if missing show the right module's name
req_mods = { "osgeo": "osgeo [python-gdal]" }

try:
  from osgeo import gdal
  from osgeo import ogr
except ImportError, e:
  error_str = str(e)
  error_mod = error_str.replace( "No module named ", "" )
  if req_mods.has_key( error_mod ):
    error_str = error_str.replace( error_mod, req_mods[error_mod] )
  raise ImportError( error_str )


class MCCDG():

  def __init__( self, iface, plugin ):
    # Save reference to the QGIS interface
    self.iface = iface
    self.plugin = plugin
    try:
      self.QgisVersion = unicode( QGis.QGIS_VERSION_INT )
    except:
      self.QgisVersion = unicode( QGis.qgisVersion )[ 0 ]

    if QGis.QGIS_VERSION[0:3] < "1.5":
      # For i18n support
      userPluginPath = QFileInfo( QgsApplication.qgisUserDbFilePath() ).path() + "/python/plugins/MCCDG"
      systemPluginPath = QgsApplication.prefixPath() + "/python/plugins/MCCDG"

      overrideLocale = QSettings().value( "locale/overrideFlag", QVariant( False ) ).toBool()
      if not overrideLocale:
        localeFullName = QLocale.system().name()
      else:
        localeFullName = QSettings().value( "locale/userLocale", QVariant( "" ) ).toString()

      if QFileInfo( userPluginPath ).exists():
        translationPath = userPluginPath + "/i18n/MCCDG_" + localeFullName + ".qm"
      else:
        translationPath = systemPluginPath + "/i18n/MCCDG_" + localeFullName + ".qm"

      self.localePath = translationPath
      if QFileInfo( self.localePath ).exists():
        self.translator = QTranslator()
        self.translator.load( self.localePath )
        QCoreApplication.installTranslator( self.translator )

  def initGui( self ):
    if int( self.QgisVersion ) < 1:
      QMessageBox.warning( self.iface.getMainWindow(), "MCCDG",
      QCoreApplication.translate( "MCCDG", "Quantum GIS version detected: " ) +unicode( self.QgisVersion )+".xx\n"
      + QCoreApplication.translate( "MCCDG", "This version of MCCDG requires at least QGIS version 1.0.0\nPlugin will not be enabled." ) )
      return None

    from tools.MCCDG_utils import Version, GdalConfig
    self.GdalVersion = Version( GdalConfig.version() )

    self.menu = QMenu()
    self.menu.setTitle( QCoreApplication.translate( "MCCDG", "&Calculating" ) )

    if self.GdalVersion >= "1.6":
      self.One = QAction( QIcon("C:/Program Files/Quantum GIS Copiapo/apps/qgis/python/plugins/MCCDG/icons/one.png"), QCoreApplication.translate( "MCCDG", "One object" ), self.iface.mainWindow() )
      self.One.setStatusTip( QCoreApplication.translate( "MCCDG", "Calculation of one object") )
      QObject.connect( self.One, SIGNAL( "triggered()" ), self.doOne )
      self.menu.addAction(self.One)

    if self.GdalVersion >= "1.6":
      self.Grupp = QAction( QIcon("C:/Program Files/Quantum GIS Copiapo/apps/qgis/python/plugins/MCCDG/icons/grupp.png"), QCoreApplication.translate( "MCCDG", "Group objects" ), self.iface.mainWindow() )
      self.Grupp.setStatusTip( QCoreApplication.translate( "MCCDG", "Calculation of a group of objects") )
      QObject.connect( self.Grupp, SIGNAL( "triggered()" ), self.doGrupp )
      self.menu.addAction(self.Grupp)

    if self.GdalVersion >= "1.6":
     if self.GdalVersion >= "1.6":
                             self.about = QAction( QIcon( "C:/Program Files/Quantum GIS Copiapo/apps/qgis/python/plugins/MCCDG/icons/prog.png" ), QCoreApplication.translate( "MCCDG", "About MCCDG" ), self.iface.mainWindow() )
    self.about.setStatusTip( QCoreApplication.translate( "MCCDG", "Displays information about MCCDG" ) )
    QObject.connect( self.about, SIGNAL( "triggered()" ), self.doAbout )
    self.menu.addSeparator()
    self.menu.addAction( self.about )

    menu_bar = self.iface.mainWindow().menuBar()
    actions = menu_bar.actions()
    lastAction = actions[ len( actions ) - 1 ]
    menu_bar.insertMenu( lastAction, self.menu )

  def unload( self ):
    pass

  def doOne( self ):
    self.d = One( self.plugin )
    self.plugin.canvas.setCursor(QCursor(Qt.CrossCursor))
    

  def doGrupp( self ):
    from tools.doGrupp import MCCDGDialog as Grupp
    d = Grupp( self.iface )
    d.exec_()

  def doAbout( self ):
    from tools.doAbout import MCCDGAboutDialog as About
    d = About( self.iface )
    d.exec_()
class A:
  def a(self):
      myWidget = A()
      myWidget.a(slotChangCursor)

      QObject.MyWidget.setCursor(Qt.CrossCursor)