Hooks into the resize event for the slider widget to update the scene
        with the latest witdth.
        
        :param      event | <QResizeEvent>

def resizeEvent(self, event):
        """
        Hooks into the resize event for the slider widget to update the scene
        with the latest witdth.
        
        :param      event | <QResizeEvent>
        """
        super(XImageSlider, self).resizeEvent(event)
        
        self.recalculate()