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 class NodeView(QTreeView):
  13     def __init__(self, parent):
  14         QTreeView.__init__(self, parent)
  15
  16         self.setRootIsDecorated(False)
  17         self.setAlternatingRowColors(True)
  18         self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
  19
  20 class NodeModel(QStandardItemModel):
  21     def __init__(self, parent):
  22         QStandardItemModel.__init__(self, 0, 3, parent)
  23         self.setHeaderData(0, Qt.Horizontal, QString("Testbed"))
  24         self.setHeaderData(1, Qt.Horizontal, QString("Hostname"))
  25         self.setHeaderData(2, Qt.Horizontal, QString("IsIn"))
  26
  27
  28 class SliceWidget(QWidget):
  29     def __init__(self, parent):
  30         QWidget.__init__(self, parent)
  31
  32         self.nodeView = NodeView(self)
  33         self.nodeModel = NodeModel(self)
  34         self.nodeView.setModel(self.nodeModel)
  35
  36         refresh = QLabel("<a href='refresh'>Refresh</a>", self)
  37         refresh.setScaledContents(False)
  38         slicename = QLabel ("Slice : %s"%(config.getSlice() or "None"),self)
  39         slicename.setScaledContents(False)
  40
  41         hlayout = QHBoxLayout()
  42         hlayout.addWidget(slicename)
  43         hlayout.addStretch()
  44         hlayout.addWidget(refresh)
  45
  46         layout = QVBoxLayout()
  47         layout.addLayout(hlayout)
  48         layout.addWidget(self.nodeView)
  49         self.setLayout(layout)
  50         self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
  51
  52         self.connect(refresh, SIGNAL('linkActivated(QString)'), self.refresh)
  53
  54         rspec_file = os.path.expanduser("~/.sfi/%s.rspec" % config.getSlice())
  55         if os.path.exists(rspec_file):
  56             self.updateView()
  57
  58     def readSliceRSpec(self):
  59         rspec_file = os.path.expanduser("~/.sfi/%s.rspec" % config.getSlice())
  60         xml = open(rspec_file).read()
  61         return xml
  62
  63     def refresh(self, link=None):
  64         if not config.getSlice():
  65             self.parent().setStatus("<font color='red'>Slice not set yet!</font>")
  66             return
  67
  68         self.process = SfiProcess()
  69         outfile = self.process.getRSpecFromSM()
  70         self.parent().setStatus("Updating slice data. This may take some time...")
  71
  72         self.connect(self.process, SIGNAL('finished()'), self.refreshFinished)
  73
  74     def refreshFinished(self):
  75         del self.process
  76         self.parent().setStatus("<font color='green'>Slice data updated.</font>")
  77         self.updateView()
  78
  79     def updateView(self):
  80         rspec_string = self.readSliceRSpec()
  81         networks = rspec_get_networks(rspec_string)
  82         networks.reverse()
  83
  84         for network in networks:
  85 #            nodes = self.rspec_get_sliver_nodes_from_network(rspec_string, network)
  86 #            for node in nodes: self.addNode(network, node, True)
  87 #            nodes = self.rspec_get_other_nodes_from_network(rspec_string, network)
  88 #            for node in nodes: self.addNode(network, node, False)
  89             # hacky - i'm just gettin used to this xml navigation stuff
  90             xml_nodes = rspec_get_xml_nodes_from_network(rspec_string, network)
  91             from lxml import etree
  92             # addNode inserts before, so let's start with the ones that are not in
  93             for xml_node in xml_nodes:
  94                 if not xml_node.xpath('sliver'):
  95                     self.addNode(network, xml_node.xpath('hostname/text()')[0],False)
  96             for xml_node in xml_nodes:
  97                 if xml_node.xpath('sliver'):
  98                     self.addNode(network, xml_node.xpath('hostname/text()')[0],True)
  99
 100
 101     def addNode(self, testbed, hostname, mark):
 102         self.nodeModel.insertRow(0)
 103         self.nodeModel.setData(self.nodeModel.index(0,0), QString(testbed))
 104         self.nodeModel.setData(self.nodeModel.index(0,1), QString(hostname))
 105         if mark:msg="x"
 106         else:   msg="-"
 107         self.nodeModel.setData(self.nodeModel.index(0,2), QString(msg))
 108
 109
 110 class MainScreen(SfaScreen):
 111     def __init__(self, parent):
 112         SfaScreen.__init__(self, parent)
 113
 114         slice = SliceWidget(self)
 115         self.init(slice, "Main Window", "PlanetLab Federation GUI")