import sys

from PyQt4.QtCore import *
from PyQt4.QtGui import *

class SfaScreen(QWidget):
    instances = []

    def __init__(self, parent):
        SfaScreen.instances.append(self)
        QWidget.__init__(self, parent)
        self.mainwin = parent
        self.name = self.title = self.widget = None

    def __del__(self):
        SfaScreen.instances.remove(self)

    def init(self, widget, name, title):
        if self.widget:
            sys.stderr.write("Screen is already initialized\n")
            return

        self.name = name
        self.title = title
        self.widget = widget

        layout = QVBoxLayout(self)
        layout.addWidget(self.widget)
        self.setLayout(layout)

    def getLinkText(self):
        return "<a href='%s'>%s</a>" % (self.name, self.name)

    def getTitleText(self):
        return "<b>%s</b>" % self.title

    def setStatus(self, msg, timeout):
        self.mainwin.setStatus(msg, timeout)

    def signalAll(self, action):
        for i in SfaScreen.instances:
            method = getattr(i, action, None)
            if method:
                method()

    def rspecUpdated(self):
        pass

    def configurationChanged(self):
        pass

    def canClose(self):
        return True

    def mainWindowClose(self):
        pass