sfamainscreen.py

   1
   2 from PyQt4.QtCore import Qt, QString, SIGNAL
   3 from PyQt4.QtGui import QWidget, QLabel, QTreeView, QStandardItemModel, QVBoxLayout, QSizePolicy
   4
   5 from sfa.util.rspecHelper import RSpec
   6
   7 from sfadata import SfaData
   8 from sfascreen import SfaScreen
   9
  10
  11 class SliceWidget(QWidget):
  12     def __init__(self, parent=None):
  13         QWidget.__init__(self, parent)
  14
  15         self.nodeView = QTreeView(self)
  16         self.nodeView.setRootIsDecorated(False)
  17         self.nodeView.setAlternatingRowColors(True)
  18         self.nodeView.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
  19
  20         self.nodeModel = QStandardItemModel(0, 2, self)
  21         self.nodeModel.setHeaderData(0, Qt.Horizontal, QString("Testbed"))
  22         self.nodeModel.setHeaderData(1, Qt.Horizontal, QString("Hostname"))
  23
  24         self.nodeView.setModel(self.nodeModel)
  25
  26         label = QLabel("<a href='refresh'>Refresh</a>", self)
  27         label.setScaledContents(False)
  28
  29         layout = QVBoxLayout()
  30         layout.addWidget(label)
  31         layout.addWidget(self.nodeView)
  32         self.setLayout(layout)
  33         self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
  34
  35         self.connect(label, SIGNAL('linkActivated(QString)'),
  36                      self.refresh)
  37
  38
  39     # TODO: use the methods from sfa-trunk
  40     def rspec_get_networks(self, rspec):
  41         return rspec.rspec.xpath("./network[@name]/@name")
  42     def rspec_get_nodes_from_network(self, rspec, network):
  43         return rspec.rspec.xpath("./network[@name='%s']/site/node/hostname/text()" % network)
  44
  45     def refresh(self, link=None):
  46         data = SfaData()
  47 #        xml = data.getRSpecFromSM()
  48         import os
  49         xml = open(os.path.expanduser("~/.sfi/ple.inria.heartbeat.rspec")).read()
  50         rspec = RSpec(xml)
  51
  52         networks = self.rspec_get_networks(rspec)
  53         networks.reverse()
  54
  55         for network in networks:
  56             nodes = self.rspec_get_nodes_from_network(rspec, network)
  57             for node in nodes:
  58                 self.addNode(network, node)
  59
  60     def addNode(self, testbed, hostname):
  61         self.nodeModel.insertRow(0)
  62         self.nodeModel.setData(self.nodeModel.index(0,0), QString(testbed))
  63         self.nodeModel.setData(self.nodeModel.index(0,1), QString(hostname))
  64
  65
  66
  67 class SfaMainScreen(SfaScreen):
  68     def __init__(self, parent=None):
  69         SfaScreen.__init__(self, parent)
  70
  71         slice = SliceWidget(self)
  72         self.init(slice, "Main Window", "PlanetLab Federation GUI")