sface/mainwindow.py

   1 import os, os.path
   2 import sys
   3 import time
   4 import traceback
   5
   6 from PyQt4.QtCore import *
   7 from PyQt4.QtGui import *
   8
   9 import sface.screens
  10 from sface.config import config
  11 from sface.logwindow import LogWindow
  12 from sface.rspecwindow import RSpecWindow
  13 from sface.screens.sfascreen import SfaScreen
  14
  15 # depending on the platform..
  16 # could probably use Qt's resource system but looks overkill for just one file...
  17 def locate_image_file (filename):
  18     for dir in [ '/usr/share', '/Applications/sface.app/Contents/Resources/sface' ] :
  19         for suffix in ['png','jpg']:
  20             attempt=os.path.join(dir,'images',"%s.%s"%(filename,suffix))
  21             if os.path.isfile(attempt) : return attempt
  22     return os.path.join('/could/not/locate/image/file',filename)
  23
  24 def load_screens(dirname):
  25     modnames = []
  26     for fn in os.listdir(dirname):
  27         if not fn.endswith(".py"):
  28             continue
  29         modname = fn.rsplit(".py",1)[0]
  30         if modname == "sfascreen":
  31             # ignore this, it's the base class, not a screen
  32             continue
  33         modnames.append(modname)
  34
  35     # we want the stock screens to show up in a specific order. plugins can
  36     # show up in any order afterward.
  37
  38     sort_order = ["mainscreen", "configscreen", "helpscreen"]
  39     sort_order.reverse()
  40     for modname in sort_order:
  41         if modname in modnames:
  42             modnames.remove(modname)
  43             modnames.insert(0,modname)
  44
  45     # import each module and find whatever class(es) is descendant from
  46     # SfaScreen within the module. Might be a better idea to just define a
  47     # screens=[] variable in each module
  48
  49     screens = []
  50     for modname in modnames:
  51         try:
  52             mod = __import__("sface.screens." + modname, fromlist=["modname"])
  53         except:
  54             print "Exception while importing screen", modname
  55             traceback.print_exc()
  56             continue
  57
  58         for object in dir(mod):
  59             object = getattr(mod, object)
  60             if hasattr(object, "__bases__") and sface.screens.sfascreen.SfaScreen in object.__bases__:
  61                 screens.append(object)
  62
  63     return screens
  64
  65 class Nav(QWidget):
  66     def __init__(self, screens, parent=None):
  67         QWidget.__init__(self, parent)
  68
  69         self.title = QLabel("", self)
  70         scene=QGraphicsScene()
  71         pixmap = QPixmap(locate_image_file('graphic-sfa64'))
  72         logolabel=QLabel("",self)
  73         logolabel.setPixmap(pixmap)
  74
  75         hlayout = QHBoxLayout()
  76         hlayout.addWidget(logolabel)
  77         hlayout.addWidget(self.title)
  78         hlayout.addStretch()
  79         gotolabel=QLabel("Go to: ", self)
  80         gotolabel.setAlignment(Qt.AlignRight)
  81         hlayout.addWidget(gotolabel)
  82
  83         self.screenLabels = []
  84         for screen in screens:
  85             label = QLabel(screen.getLinkText(), self)
  86             label.setAlignment(Qt.AlignRight)
  87             self.screenLabels.append(label)
  88             hlayout.addWidget(label)
  89
  90         self.setLayout(hlayout)
  91
  92     def setTitle(self, title):
  93         self.title.setText(title)
  94
  95
  96 class Status(QLabel):
  97     def __init__(self, parent=None):
  98         QLabel.__init__(self, "", parent)
  99         self.sliceUpdateDate()
 100
 101     def set(self, msg, timeout):
 102         self.setText(msg)
 103         if timeout:
 104             QTimer.singleShot(timeout, self.reset)
 105
 106     def sliceUpdateDate(self):
 107         rspec_file = config.getSliceRSpecFile()
 108         if not os.path.exists(rspec_file):
 109             return
 110
 111         creation_time = os.stat(rspec_file).st_ctime
 112         last_update = time.ctime(creation_time)
 113         self.set("Slice data last updated on %s" % last_update, timeout=None)
 114
 115     def reset(self):
 116         self.setText("")
 117         QTimer.singleShot(1500, self.sliceUpdateDate)
 118
 119
 120 class MainWindow(QWidget):
 121     def __init__(self, parent=None):
 122         QWidget.__init__(self, parent)
 123
 124         self.logWindow = LogWindow(self)
 125         self.rspecWindow = RSpecWindow(self)
 126
 127         self.pix = QLabel(self)
 128
 129         screenClasses = load_screens(os.path.dirname(sface.screens.__file__))
 130         self.screenWidgets = []
 131
 132         self.screens = QStackedWidget(self)
 133         for screen in screenClasses:
 134             # use a try/catch block to isolate the screen. Third-party plugins
 135             # could be buggy.
 136             try:
 137                 screenWidget = screen(self)
 138                 self.screenWidgets.append(screenWidget)
 139                 self.screens.addWidget(screenWidget)
 140             except:
 141                 print "Exception while creating screen", screen.__name__
 142                 traceback.print_exc()
 143
 144         self.screens.addWidget(self.pix)
 145         self.next_screen = None
 146
 147         self.nav = Nav(self.screenWidgets, self)
 148
 149         if self.screenWidgets:
 150             self.nav.setTitle(self.screenWidgets[0].getTitleText())
 151
 152         self.status = Status(self)
 153         self.log = QLabel("<a href='showlog'>Show Log</a>", self)
 154         self.rspec = QLabel("<a href='showlog'>Show RSpec</a>", self)
 155
 156         hlayout = QHBoxLayout()
 157         hlayout.addWidget(self.status)
 158         hlayout.addStretch()
 159         hlayout.addWidget(self.rspec)
 160         hlayout.addWidget(self.log)
 161
 162         layout = QVBoxLayout()
 163         layout.addWidget(self.nav)
 164         layout.addWidget(self.screens)
 165         layout.addLayout(hlayout)
 166         self.setLayout(layout)
 167         self.resize(800, 500)
 168
 169         for link in self.nav.screenLabels:
 170             self.connect(link, SIGNAL('linkActivated(QString)'),
 171                          self.animateToScreen)
 172
 173         self.connect(self.log, SIGNAL('linkActivated(QString)'),
 174                      self.showLogWindow)
 175         self.connect(self.rspec, SIGNAL('linkActivated(QString)'),
 176                      self.showRSpecWindow)
 177
 178     def redirectOutputToLog(self):
 179         self.logWindow.redirectOutput()
 180
 181     def showLogWindow(self, link):
 182         self.logWindow.show()
 183         self.logWindow.resize(800, 200)
 184         self.logWindow.raise_()
 185         self.logWindow.activateWindow()
 186
 187     def showRSpecWindow(self, link):
 188         self.rspecWindow.show()
 189         self.rspecWindow.resize(500, 640)
 190         self.rspecWindow.raise_()
 191         self.rspecWindow.activateWindow()
 192
 193
 194     def animatePixmap(self, y):
 195         self.pix.move(0, y)
 196
 197     def animateToScreen(self, link):
 198         for screen in self.screenWidgets:
 199             if link == screen.name:
 200                 self.next_screen = screen
 201
 202         curr_screen = self.screens.currentWidget()
 203
 204         if self.next_screen == curr_screen:
 205             self.setStatus("Already showing %s" % curr_screen.getTitleText(), timeout=1000)
 206             return
 207
 208         # This is an optimization to have a smoother animation. We
 209         # render the widget into a pixmap and animate that instead of
 210         # moving the whole widget around.
 211         pixmap = QPixmap(self.screens.size())
 212         curr_screen.render(pixmap)
 213         self.screens.setCurrentWidget(self.pix)
 214         self.pix.setPixmap(pixmap)
 215
 216         timeLine = QTimeLine(500, self)
 217         timeLine.setFrameRange(0, self.screens.height());
 218         self.connect(timeLine, SIGNAL('frameChanged(int)'), self.animatePixmap)
 219         self.connect(timeLine, SIGNAL('finished()'), self.toNextScreen)
 220         timeLine.start()
 221
 222
 223     def toNextScreen(self):
 224         self.screens.setCurrentWidget(self.next_screen)
 225         self.nav.setTitle(self.next_screen.getTitleText())
 226
 227     def setStatus(self, msg, timeout):
 228         self.status.set(msg, timeout)
 229
 230     def nodeSelectionChanged(self, hostname):
 231         if self.rspecWindow.isVisible():
 232             self.rspecWindow.showNode(hostname)