scenic

from scenic import sig

from scenic import process

from scenic.internationalization import _

class Preview(object):

    """

        x_window_id = None

        if not self.app.config.preview_in_window:

            if self.app.gui.preview_area_x_window_id is None:

            else:

                x_window_id = self.app.gui.preview_area_x_window_id

        command = "milhouse --videosource %s --localvideo --window-title \"%s\" --width %s --height %s --aspect-ratio %s" % (self.app.config.video_source, window_title, width, height, aspect_ratio, )

        if self.app.config.video_source != "videotestsrc":

            dev = self.app.parse_v4l2_device_name(self.app.config.video_device)

            if dev is None:

                #FIXME: handle this

            video_device = dev["name"]

            command += " --videodevice %s" % (video_device)

        return command

    def start(self):

        if self.state != process.STATE_STOPPED:

            raise RuntimeError("Cannot start preview since it is %s." % (self.state)) # the programmer has done something wrong if we're here.

        else:

        self.process_manager.start()

    def on_stdout_line(self, process_manager, line):

    def on_stderr_line(self, process_manager, line):

    def on_process_state_changed(self, process_manager, process_state):

        """

        Slot for the ProcessManager.state_changed_signal

        """

        if process_state == process.STATE_RUNNING:

            # As soon as it is running, set our state to running

            if self.state == process.STATE_STARTING:

        """

        Stops the preview process.

        """

        if self.state in [process.STATE_RUNNING, process.STATE_STARTING]:

            self._set_state(process.STATE_STOPPING)

            if self.process_manager is not None:

                if self.process_manager.state != process.STATE_STOPPED and self.process_manager.state != process.STATE_STOPPING:

                    self.process_manager.stop()

        else: