PySide: Clickable QLabel

import sys
from PySide.QtGui import *
from PySide.QtCore import *


class ClickableLabel(QLabel):
    '''Normal label, but emits an event if the label is left-clicked'''

    signalClicked = Signal()    # emitted whenever this label is left-clicked

    def __init__(self, text, parent=None):
        super(ClickableLabel, self).__init__(text, parent)
        self.setStyleSheet('''
        QLabel {text-decoration:none}
        QLabel:hover {color:white; background:grey;}
        ''')
        self.setFixedSize(self.sizeHint())

    def mousePressEvent(self, event):
        if event.button() == Qt.LeftButton:
            self.signalClicked.emit()


class HtmlLabel(QLabel):
    '''
    Normal label, but 'text' is embedded in html, which makes the label
    emitting the 'linkActivated' signal on left-clicks
    '''

    def __init__(self, text, parent=None):
        super(HtmlLabel, self).__init__(self.getHtml(text), parent)
        self.setStyleSheet('QLabel:hover {background:grey;}')
        self.setFixedSize(self.sizeHint())

    def getHtml(self, text):
        '''Return text embedded in a html link tag'''

        return '''<a style = "text-decoration:none" href="asdf">%s</a>''' % text


class View(QWidget):
    '''Demonstration GUI to show use of ClickableLabel and HtmlLabel'''

    def __init__(self):
        super(View, self).__init__()
        self.setupUi()

    def setupUi(self):
        '''Initialize the GUI with different types of clickable labels'''

        self.resize(550, 200)
        self.layoutGeneral = QHBoxLayout(self)
        self.layoutGeneral.setSpacing(50)
        self.layoutLabel = QVBoxLayout()
        self.layoutGeneral.addLayout(self.layoutLabel)
        self.layoutDisplay = QVBoxLayout()
        self.layoutGeneral.addLayout(self.layoutDisplay)

        self.labelDate = ClickableLabel('Date')
        self.labelName = ClickableLabel('Name')
        self.labelAuthorHtml = HtmlLabel('Author')

        self.labelDisplay = QLabel('Click on the labels on the left')

        self.layoutLabel.addWidget(self.labelDate)
        self.layoutLabel.addWidget(self.labelName)
        self.layoutLabel.addWidget(self.labelAuthorHtml)

        self.layoutDisplay.addWidget(self.labelDisplay)



class Controller(QObject):
    '''Controls interaction between model and view'''

    def __init__(self):
        super(Controller, self).__init__()
        self.view = View()
        self.connectSignals()

    def start(self):
        '''Start application'''

        self.view.show()

    def connectSignals(self):
        '''Connect the clickable labels with the corresponding slot'''

        self.view.labelDate.signalClicked.connect(self.onClickableLabel)
        self.view.labelName.signalClicked.connect(self.onClickableLabel)
        self.view.labelAuthorHtml.linkActivated.connect(self.onClickableLabel)

    def onClickableLabel(self):
        '''A label was clicked, show the text of the label in the display'''

        self.view.labelDisplay.setText('The label with the following text '\
                                       'was clicked:\n' + self.sender().text())



def main():
    app = QApplication(sys.argv)
    controller = Controller()
    controller.start()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()