Method refresh

src/com/dtmilano/android/culebron.py:1207–1222

(self)

        self.printOperation(None, Operation.WAKE)

    def refresh(self):
        self.showVignette()
        self.device.wake()
        display = copy.copy(self.device.display)
        self.device.initDisplayProperties()
        changed = False
        for prop in display:
            if display[prop] != self.device.display[prop]:
                changed = True
                break
        if changed:
            self.deleteVignette()
            self.canvas.destroy()
            self.canvas = None
            self.window.update_idletasks()
        self.takeScreenshotAndShowItOnWindow()

    def cancelOperation(self):
        """