sface/screens/mainscreen.py

   1
   2 import os
   3 from PyQt4.QtCore import *
   4 from PyQt4.QtGui import *
   5
   6 from sfa.util.rspecHelper import RSpec
   7 from sface.sfahelper import *
   8 from sface.sficonfig import config
   9 from sface.sfiprocess import SfiProcess
  10 from sface.screens.sfascreen import SfaScreen
  11
  12
  13 class SliceWidget(QWidget):
  14     def __init__(self, parent):
  15         QWidget.__init__(self, parent)
  16
  17         self.nodeView = QTreeView(self)
  18         self.nodeView.setRootIsDecorated(False)
  19         self.nodeView.setAlternatingRowColors(True)
  20         self.nodeView.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
  21
  22         self.nodeModel = QStandardItemModel(0, 3, self)
  23         self.nodeModel.setHeaderData(0, Qt.Horizontal, QString("Testbed"))
  24         self.nodeModel.setHeaderData(1, Qt.Horizontal, QString("Hostname"))
  25         self.nodeModel.setHeaderData(2, Qt.Horizontal, QString("IsIn"))
  26
  27         self.nodeView.setModel(self.nodeModel)
  28
  29         refresh = QLabel("<a href='refresh'>Refresh</a>", self)
  30         refresh.setScaledContents(False)
  31         slicename = QLabel ("Slice : %s"%(config.getSlice() or "None"),self)
  32         slicename.setScaledContents(False)
  33
  34         hlayout = QHBoxLayout()
  35         hlayout.addWidget(slicename)
  36         hlayout.addStretch()
  37         hlayout.addWidget(refresh)
  38
  39         layout = QVBoxLayout()
  40         layout.addLayout(hlayout)
  41         layout.addWidget(self.nodeView)
  42         self.setLayout(layout)
  43         self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
  44
  45         self.connect(refresh, SIGNAL('linkActivated(QString)'), self.refresh)
  46
  47         rspec_file = os.path.expanduser("~/.sfi/%s.rspec" % config.getSlice())
  48         if os.path.exists(rspec_file):
  49             self.updateView()
  50
  51     def readSliceRSpec(self):
  52         rspec_file = os.path.expanduser("~/.sfi/%s.rspec" % config.getSlice())
  53         xml = open(rspec_file).read()
  54         return xml
  55
  56     def refresh(self, link=None):
  57         if not config.getSlice():
  58             self.parent().setStatus("<font color='red'>Slice not set yet!</font>")
  59             return
  60
  61         self.process = SfiProcess()
  62         outfile = self.process.getRSpecFromSM()
  63         self.parent().setStatus("Updating slice data. This may take some time...")
  64
  65         self.connect(self.process, SIGNAL('finished()'), self.refreshFinished)
  66
  67     def refreshFinished(self):
  68         del self.process
  69         self.parent().setStatus("<font color='green'>Slice data updated.</font>")
  70         self.updateView()
  71
  72     def updateView(self):
  73         rspec_string = self.readSliceRSpec()
  74         networks = rspec_get_networks(rspec_string)
  75         networks.reverse()
  76
  77         for network in networks:
  78 #            nodes = self.rspec_get_sliver_nodes_from_network(rspec_string, network)
  79 #            for node in nodes: self.addNode(network, node, True)
  80 #            nodes = self.rspec_get_other_nodes_from_network(rspec_string, network)
  81 #            for node in nodes: self.addNode(network, node, False)
  82             # hacky - i'm just gettin used to this xml navigation stuff
  83             xml_nodes = rspec_get_xml_nodes_from_network(rspec_string, network)
  84             from lxml import etree
  85             # addNode inserts before, so let's start with the ones that are not in
  86             for xml_node in xml_nodes:
  87                 if not xml_node.xpath('sliver'):
  88                     self.addNode(network, xml_node.xpath('hostname/text()')[0],False)
  89             for xml_node in xml_nodes:
  90                 if xml_node.xpath('sliver'):
  91                     self.addNode(network, xml_node.xpath('hostname/text()')[0],True)
  92
  93
  94     def addNode(self, testbed, hostname, mark):
  95         self.nodeModel.insertRow(0)
  96         self.nodeModel.setData(self.nodeModel.index(0,0), QString(testbed))
  97         self.nodeModel.setData(self.nodeModel.index(0,1), QString(hostname))
  98         if mark:msg="x"
  99         else:   msg="-"
 100         self.nodeModel.setData(self.nodeModel.index(0,2), QString(msg))
 101
 102
 103 class MainScreen(SfaScreen):
 104     def __init__(self, parent):
 105         SfaScreen.__init__(self, parent)
 106
 107         slice = SliceWidget(self)
 108         self.init(slice, "Main Window", "PlanetLab Federation GUI")