from PyQt4.QtCore import Qt, SIGNAL
from PyQt4.QtGui import QWidget, QStackedWidget, \
    QVBoxLayout, QLabel

from sfaconfigscreen import SfaConfigScreen
from sfamainscreen import SfaMainScreen


class SfaWindow(QWidget):
    
    def __init__(self, parent=None):
        QWidget.__init__(self, parent)

        self.config_screen = SfaConfigScreen(self)
        self.main_screen = SfaMainScreen(self)

        self.screens = QStackedWidget(self)
        self.screens.addWidget(self.main_screen)
        self.screens.addWidget(self.config_screen)

        self.switch = QLabel(self.config_screen.getLabelText(), self)
        self.switch.setAlignment(Qt.AlignRight)
        
        layout = QVBoxLayout()
        layout.addWidget(self.switch)
        layout.addWidget(self.screens)
        layout.addStretch()
        self.setLayout(layout)
        self.adjustSize()

        self.connect(self.switch, SIGNAL('linkActivated(QString)'),
                     self.toScreen)

    def toScreen(self, link):
        print link
        if link == self.config_screen.name:
            self.toConfigScreen()
        elif link == self.main_screen.name:
            self.toMainScreen()

    def toConfigScreen(self):
        self.screens.setCurrentWidget(self.config_screen)
        self.switch.setText(self.main_screen.getLabelText())

    def toMainScreen(self):
        self.screens.setCurrentWidget(self.main_screen)
        self.switch.setText(self.config_screen.getLabelText())