window_title_changed_signaler.py

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from python_qt_binding.QtCore import QEvent, QObject, Signal


class WindowTitleChangedSignaler(QObject):

    """Storage of key-value data with a QSettings-like interface."""

    window_title_changed_signal = Signal(object)

    def __init__(self, widget, parent=None):
        super(WindowTitleChangedSignaler, self).__init__(parent)
        self.setObjectName('WindowTitleChangedSignaler__' + widget.objectName())
        self._widget = widget
        self._widget.installEventFilter(self)

    def eventFilter(self, watched, event):
        if event.type() == QEvent.WindowTitleChange:
            self.window_title_changed_signal.emit(self._widget)
        return QObject.eventFilter(self, watched, event)