Ejemplo n.º 1
0
    def __init__(self, parent, title='', sample_rate=1):
        num_inputs = 3
	gr.hier_block2.__init__(
            self,
            "scope_sink",
            gr.io_signature(num_inputs, num_inputs, gr.sizeof_float),
            gr.io_signature(0, 0, 0),
	)
        msgq = gr.msg_queue(2)
        scope = wxgui.oscope_sink_f(sample_rate, msgq)
	self.controller = pubsub()
	self.controller.subscribe(SAMPLE_RATE_KEY, scope.set_sample_rate)
	self.controller.publish(SAMPLE_RATE_KEY, scope.sample_rate)
	self.controller.subscribe(DECIMATION_KEY, scope.set_decimation_count)
	self.controller.publish(DECIMATION_KEY, scope.get_decimation_count)
	self.controller.subscribe(TRIGGER_LEVEL_KEY, scope.set_trigger_level)
	self.controller.publish(TRIGGER_LEVEL_KEY, scope.get_trigger_level)
	self.controller.subscribe(TRIGGER_MODE_KEY, scope.set_trigger_mode)
	self.controller.publish(TRIGGER_MODE_KEY, scope.get_trigger_mode)
	self.controller.subscribe(TRIGGER_SLOPE_KEY, scope.set_trigger_slope)
	self.controller.publish(TRIGGER_SLOPE_KEY, scope.get_trigger_slope)
	self.controller.subscribe(TRIGGER_CHANNEL_KEY, scope.set_trigger_channel)
	self.controller.publish(TRIGGER_CHANNEL_KEY, scope.get_trigger_channel)
	for i in range(num_inputs):
		self.controller[common.index_key(AC_COUPLE_KEY, i)] = False
	common.input_watcher(msgq, self.controller, MSG_KEY)
	#create window
	self.win = my_scope_window(
		parent=parent,
		controller=self.controller,
		size=(600, 300),
		title=title,
		frame_rate=60, #scope_window.DEFAULT_FRAME_RATE,
		num_inputs=num_inputs,
		sample_rate_key=SAMPLE_RATE_KEY,
		t_scale=0.1,
		v_scale=1,
		v_offset=0,
		xy_mode=False,
		trig_mode=wxgui.TRIG_MODE_FREE,
		y_axis_label='Counts',
		ac_couple_key=AC_COUPLE_KEY,
		trigger_level_key=TRIGGER_LEVEL_KEY,
		trigger_mode_key=TRIGGER_MODE_KEY,
		trigger_slope_key=TRIGGER_SLOPE_KEY,
		trigger_channel_key=TRIGGER_CHANNEL_KEY,
		decimation_key=DECIMATION_KEY,
		msg_key=MSG_KEY,
                use_persistence=True,
                persist_alpha=0.001,
	)
	common.register_access_methods(self, self.win)
	for i in range(num_inputs):
		self.wxgui_connect(
			(self, i),
			ac_couple_block(self.controller, common.index_key(AC_COUPLE_KEY, i), SAMPLE_RATE_KEY),
			(scope, i),
		)
Ejemplo n.º 2
0
 def __init__(self, parent, title='', sample_rate=1):
     num_inputs = 3
     gr.hier_block2.__init__(
         self,
         "scope_sink",
         gr.io_signature(num_inputs, num_inputs, gr.sizeof_float),
         gr.io_signature(0, 0, 0),
     )
     msgq = gr.msg_queue(2)
     scope = wxgui.oscope_sink_f(sample_rate, msgq)
     self.controller = pubsub()
     self.controller.subscribe(SAMPLE_RATE_KEY, scope.set_sample_rate)
     self.controller.publish(SAMPLE_RATE_KEY, scope.sample_rate)
     self.controller.subscribe(DECIMATION_KEY, scope.set_decimation_count)
     self.controller.publish(DECIMATION_KEY, scope.get_decimation_count)
     self.controller.subscribe(TRIGGER_LEVEL_KEY, scope.set_trigger_level)
     self.controller.publish(TRIGGER_LEVEL_KEY, scope.get_trigger_level)
     self.controller.subscribe(TRIGGER_MODE_KEY, scope.set_trigger_mode)
     self.controller.publish(TRIGGER_MODE_KEY, scope.get_trigger_mode)
     self.controller.subscribe(TRIGGER_SLOPE_KEY, scope.set_trigger_slope)
     self.controller.publish(TRIGGER_SLOPE_KEY, scope.get_trigger_slope)
     self.controller.subscribe(TRIGGER_CHANNEL_KEY,
                               scope.set_trigger_channel)
     self.controller.publish(TRIGGER_CHANNEL_KEY, scope.get_trigger_channel)
     for i in range(num_inputs):
         self.controller[common.index_key(AC_COUPLE_KEY, i)] = False
     common.input_watcher(msgq, self.controller, MSG_KEY)
     #create window
     self.win = my_scope_window(
         parent=parent,
         controller=self.controller,
         size=(600, 300),
         title=title,
         frame_rate=60,  #scope_window.DEFAULT_FRAME_RATE,
         num_inputs=num_inputs,
         sample_rate_key=SAMPLE_RATE_KEY,
         t_scale=0.1,
         v_scale=1,
         v_offset=0,
         xy_mode=False,
         trig_mode=wxgui.TRIG_MODE_FREE,
         y_axis_label='Counts',
         ac_couple_key=AC_COUPLE_KEY,
         trigger_level_key=TRIGGER_LEVEL_KEY,
         trigger_mode_key=TRIGGER_MODE_KEY,
         trigger_slope_key=TRIGGER_SLOPE_KEY,
         trigger_channel_key=TRIGGER_CHANNEL_KEY,
         decimation_key=DECIMATION_KEY,
         msg_key=MSG_KEY,
         use_persistence=True,
         persist_alpha=0.001,
     )
     common.register_access_methods(self, self.win)
     for i in range(num_inputs):
         self.wxgui_connect(
             (self, i),
             ac_couple_block(self.controller,
                             common.index_key(AC_COUPLE_KEY, i),
                             SAMPLE_RATE_KEY),
             (scope, i),
         )
Ejemplo n.º 3
0
    def handle_samples(self):
        """
		Handle the cached samples from the scope input.
		Perform ac coupling, triggering, and auto ranging.
		"""
        if not self.sampleses: return
        sampleses = self.sampleses
        #if self[XY_MODE_KEY]:
        if True:
            self[DECIMATION_KEY] = 1
            x_samples = sampleses[self[X_CHANNEL_KEY]]
            y_samples = sampleses[self[Y_CHANNEL_KEY]]
            z_samples = sampleses[2]
            #autorange
            if self[AUTORANGE_KEY] and time.time(
            ) - self.autorange_ts > AUTORANGE_UPDATE_RATE:
                x_min, x_max = common.get_min_max(x_samples)
                y_min, y_max = common.get_min_max(y_samples)
                #adjust the x per div
                x_per_div = common.get_clean_num(
                    (x_max - x_min) / self[X_DIVS_KEY])
                if x_per_div != self[X_PER_DIV_KEY]:
                    self[X_PER_DIV_KEY] = x_per_div
                    return
                #adjust the x offset
                x_off = x_per_div * round((x_max + x_min) / 2 / x_per_div)
                if x_off != self[X_OFF_KEY]:
                    self[X_OFF_KEY] = x_off
                    return
                #adjust the y per div
                y_per_div = common.get_clean_num(
                    (y_max - y_min) / self[Y_DIVS_KEY])
                if y_per_div != self[Y_PER_DIV_KEY]:
                    self[Y_PER_DIV_KEY] = y_per_div
                    return
                #adjust the y offset
                y_off = y_per_div * round((y_max + y_min) / 2 / y_per_div)
                if y_off != self[Y_OFF_KEY]:
                    self[Y_OFF_KEY] = y_off
                    return
                self.autorange_ts = time.time()
            #plot xy channel
            self.plotter.set_waveform(
                channel='XY',
                samples=(x_samples, y_samples, z_samples),
                color_spec=CHANNEL_COLOR_SPECS[0],
                marker=self[XY_MARKER_KEY],
            )
            #turn off each waveform
            for i, samples in enumerate(sampleses):
                self.plotter.clear_waveform(channel='Ch%d' % (i + 1))
        else:
            #autorange
            if self[AUTORANGE_KEY] and time.time(
            ) - self.autorange_ts > AUTORANGE_UPDATE_RATE:
                bounds = [common.get_min_max(samples) for samples in sampleses]
                y_min = numpy.min([bound[0] for bound in bounds])
                y_max = numpy.max([bound[1] for bound in bounds])
                #adjust the y per div
                y_per_div = common.get_clean_num(
                    (y_max - y_min) / self[Y_DIVS_KEY])
                if y_per_div != self[Y_PER_DIV_KEY]:
                    self[Y_PER_DIV_KEY] = y_per_div
                    return
                #adjust the y offset
                y_off = y_per_div * round((y_max + y_min) / 2 / y_per_div)
                if y_off != self[Y_OFF_KEY]:
                    self[Y_OFF_KEY] = y_off
                    return
                self.autorange_ts = time.time()
            #number of samples to scale to the screen
            actual_rate = self.get_actual_rate()
            time_span = self[T_PER_DIV_KEY] * self[T_DIVS_KEY]
            num_samps = int(round(time_span * actual_rate))
            #handle the time offset
            t_off = self[T_FRAC_OFF_KEY] * (len(sampleses[0]) / actual_rate -
                                            time_span)
            if t_off != self[T_OFF_KEY]:
                self[T_OFF_KEY] = t_off
                return
            samps_off = int(round(actual_rate * self[T_OFF_KEY]))
            #adjust the decim so that we use about half the samps
            self[DECIMATION_KEY] = int(
                round(time_span * self[SAMPLE_RATE_KEY] /
                      (0.5 * len(sampleses[0]))))
            #num samps too small, auto increment the time
            if num_samps < 2:
                self[T_PER_DIV_KEY] = common.get_clean_incr(
                    self[T_PER_DIV_KEY])
                #num samps in bounds, plot each waveform
            elif num_samps <= len(sampleses[0]):
                for i, samples in enumerate(sampleses):
                    #plot samples
                    self.plotter.set_waveform(
                        channel='Ch%d' % (i + 1),
                        samples=samples[samps_off:num_samps + samps_off],
                        color_spec=CHANNEL_COLOR_SPECS[i],
                        marker=self[common.index_key(MARKER_KEY, i)],
                        trig_off=self.trigger_offset,
                    )
            #turn XY channel off
            self.plotter.clear_waveform(channel='XY')
        #keep trigger level within range
        if self[TRIGGER_LEVEL_KEY] > self.get_y_max():
            self[TRIGGER_LEVEL_KEY] = self.get_y_max()
            return
        if self[TRIGGER_LEVEL_KEY] < self.get_y_min():
            self[TRIGGER_LEVEL_KEY] = self.get_y_min()
            return
        #disable the trigger channel
        if not self[TRIGGER_SHOW_KEY] or self[XY_MODE_KEY] or self[
                TRIGGER_MODE_KEY] == wxgui.TRIG_MODE_FREE:
            self.plotter.clear_waveform(channel='Trig')
        else:  #show trigger channel
            trigger_level = self[TRIGGER_LEVEL_KEY]
            trigger_point = (len(self.sampleses[0]) -
                             1) / self.get_actual_rate() / 2.0
            self.plotter.set_waveform(
                channel='Trig',
                samples=([
                    self.get_t_min(), trigger_point, trigger_point,
                    trigger_point, trigger_point,
                    self.get_t_max()
                ], [
                    trigger_level, trigger_level,
                    self.get_y_max(),
                    self.get_y_min(), trigger_level, trigger_level
                ]),
                color_spec=TRIGGER_COLOR_SPEC,
            )
        #update the plotter
        self.plotter.update()
Ejemplo n.º 4
0
    def __init__(
        self,
        parent,
        controller,
        size,
        title,
        frame_rate,
        num_inputs,
        sample_rate_key,
        t_scale,
        v_scale,
        v_offset,
        xy_mode,
        ac_couple_key,
        trigger_level_key,
        trigger_mode_key,
        trigger_slope_key,
        trigger_channel_key,
        decimation_key,
        msg_key,
        use_persistence,
        persist_alpha,
        trig_mode,
        y_axis_label,
    ):
        pubsub.__init__(self)
        #check num inputs
        assert num_inputs <= len(CHANNEL_COLOR_SPECS)
        #setup
        self.sampleses = None
        self.num_inputs = num_inputs
        autorange = not v_scale
        self.autorange_ts = 0
        v_scale = v_scale or 1
        self.frame_rate_ts = 0
        #proxy the keys
        self.proxy(MSG_KEY, controller, msg_key)
        self.proxy(SAMPLE_RATE_KEY, controller, sample_rate_key)
        self.proxy(TRIGGER_LEVEL_KEY, controller, trigger_level_key)
        self.proxy(TRIGGER_MODE_KEY, controller, trigger_mode_key)
        self.proxy(TRIGGER_SLOPE_KEY, controller, trigger_slope_key)
        self.proxy(TRIGGER_CHANNEL_KEY, controller, trigger_channel_key)
        self.proxy(DECIMATION_KEY, controller, decimation_key)
        #initialize values
        self[RUNNING_KEY] = True
        self[XY_MARKER_KEY] = 2.0
        self[CHANNEL_OPTIONS_KEY] = 0
        self[XY_MODE_KEY] = xy_mode
        self[X_CHANNEL_KEY] = 0
        self[Y_CHANNEL_KEY] = 1
        self[AUTORANGE_KEY] = autorange
        self[T_PER_DIV_KEY] = t_scale
        self[X_PER_DIV_KEY] = v_scale
        self[Y_PER_DIV_KEY] = v_scale
        self[T_OFF_KEY] = 0
        self[X_OFF_KEY] = v_offset
        self[Y_OFF_KEY] = v_offset
        self[T_DIVS_KEY] = 8
        self[X_DIVS_KEY] = 8
        self[Y_DIVS_KEY] = 8
        self[Y_AXIS_LABEL] = y_axis_label
        self[FRAME_RATE_KEY] = frame_rate
        self[TRIGGER_LEVEL_KEY] = 0
        self[TRIGGER_CHANNEL_KEY] = 0
        self[TRIGGER_MODE_KEY] = trig_mode

        self[TRIGGER_SLOPE_KEY] = wxgui.TRIG_SLOPE_POS
        self[T_FRAC_OFF_KEY] = 0.5
        self[USE_PERSISTENCE_KEY] = use_persistence
        self[PERSIST_ALPHA_KEY] = persist_alpha

        if self[TRIGGER_MODE_KEY] == wxgui.TRIG_MODE_STRIPCHART:
            self[T_FRAC_OFF_KEY] = 0.0

        for i in range(num_inputs):
            self.proxy(common.index_key(AC_COUPLE_KEY, i), controller,
                       common.index_key(ac_couple_key, i))
        #init panel and plot
        wx.Panel.__init__(self, parent, style=wx.SIMPLE_BORDER)
        self.plotter = my_plotter(self)
        self.plotter.SetSize(wx.Size(*size))
        self.plotter.SetSizeHints(*size)
        self.plotter.set_title(title)
        self.plotter.enable_legend(True)
        self.plotter.enable_point_label(True)
        self.plotter.enable_grid_lines(True)
        self.plotter.set_use_persistence(use_persistence)
        self.plotter.set_persist_alpha(persist_alpha)
        #setup the box with plot and controls
        self.control_panel = scope_window.control_panel(self)
        main_box = wx.BoxSizer(wx.HORIZONTAL)
        main_box.Add(self.plotter, 1, wx.EXPAND)
        main_box.Add(self.control_panel, 0, wx.EXPAND)
        self.SetSizerAndFit(main_box)
        #register events for message
        self.subscribe(MSG_KEY, self.handle_msg)
        #register events for grid
        for key in [
                common.index_key(MARKER_KEY, i) for i in range(self.num_inputs)
        ] + [
                TRIGGER_LEVEL_KEY,
                TRIGGER_MODE_KEY,
                T_PER_DIV_KEY,
                X_PER_DIV_KEY,
                Y_PER_DIV_KEY,
                T_OFF_KEY,
                X_OFF_KEY,
                Y_OFF_KEY,
                T_DIVS_KEY,
                X_DIVS_KEY,
                Y_DIVS_KEY,
                XY_MODE_KEY,
                AUTORANGE_KEY,
                T_FRAC_OFF_KEY,
                TRIGGER_SHOW_KEY,
                XY_MARKER_KEY,
                X_CHANNEL_KEY,
                Y_CHANNEL_KEY,
        ]:
            self.subscribe(key, self.update_grid)
        #register events for plotter settings
        self.subscribe(USE_PERSISTENCE_KEY, self.plotter.set_use_persistence)
        self.subscribe(PERSIST_ALPHA_KEY, self.plotter.set_persist_alpha)
        #initial update
        self.update_grid()
Ejemplo n.º 5
0
	def handle_samples(self):
		"""
		Handle the cached samples from the scope input.
		Perform ac coupling, triggering, and auto ranging.
		"""
		if not self.sampleses: return
		sampleses = self.sampleses
		#if self[XY_MODE_KEY]:
                if True:
			self[DECIMATION_KEY] = 1
			x_samples = sampleses[self[X_CHANNEL_KEY]]
			y_samples = sampleses[self[Y_CHANNEL_KEY]]
                        z_samples = sampleses[2]
			#autorange
			if self[AUTORANGE_KEY] and time.time() - self.autorange_ts > AUTORANGE_UPDATE_RATE:
				x_min, x_max = common.get_min_max(x_samples)
				y_min, y_max = common.get_min_max(y_samples)
				#adjust the x per div
				x_per_div = common.get_clean_num((x_max-x_min)/self[X_DIVS_KEY])
				if x_per_div != self[X_PER_DIV_KEY]: self[X_PER_DIV_KEY] = x_per_div; return
				#adjust the x offset
				x_off = x_per_div*round((x_max+x_min)/2/x_per_div)
				if x_off != self[X_OFF_KEY]: self[X_OFF_KEY] = x_off; return
				#adjust the y per div
				y_per_div = common.get_clean_num((y_max-y_min)/self[Y_DIVS_KEY])
				if y_per_div != self[Y_PER_DIV_KEY]: self[Y_PER_DIV_KEY] = y_per_div; return
				#adjust the y offset
				y_off = y_per_div*round((y_max+y_min)/2/y_per_div)
				if y_off != self[Y_OFF_KEY]: self[Y_OFF_KEY] = y_off; return
				self.autorange_ts = time.time()
			#plot xy channel
			self.plotter.set_waveform(
				channel='XY',
				samples=(x_samples, y_samples, z_samples),
				color_spec=CHANNEL_COLOR_SPECS[0],
				marker=self[XY_MARKER_KEY],
			)
			#turn off each waveform
			for i, samples in enumerate(sampleses):
				self.plotter.clear_waveform(channel='Ch%d'%(i+1))
		else:
			#autorange
			if self[AUTORANGE_KEY] and time.time() - self.autorange_ts > AUTORANGE_UPDATE_RATE:
				bounds = [common.get_min_max(samples) for samples in sampleses]
				y_min = numpy.min([bound[0] for bound in bounds])
				y_max = numpy.max([bound[1] for bound in bounds])
				#adjust the y per div
				y_per_div = common.get_clean_num((y_max-y_min)/self[Y_DIVS_KEY])
				if y_per_div != self[Y_PER_DIV_KEY]: self[Y_PER_DIV_KEY] = y_per_div; return
				#adjust the y offset
				y_off = y_per_div*round((y_max+y_min)/2/y_per_div)
				if y_off != self[Y_OFF_KEY]: self[Y_OFF_KEY] = y_off; return
				self.autorange_ts = time.time()
			#number of samples to scale to the screen
			actual_rate = self.get_actual_rate()
			time_span = self[T_PER_DIV_KEY]*self[T_DIVS_KEY]
			num_samps = int(round(time_span*actual_rate))
			#handle the time offset
			t_off = self[T_FRAC_OFF_KEY]*(len(sampleses[0])/actual_rate - time_span)
			if t_off != self[T_OFF_KEY]: self[T_OFF_KEY] = t_off; return
			samps_off = int(round(actual_rate*self[T_OFF_KEY]))
			#adjust the decim so that we use about half the samps
			self[DECIMATION_KEY] = int(round(
					time_span*self[SAMPLE_RATE_KEY]/(0.5*len(sampleses[0]))
				)
			)
			#num samps too small, auto increment the time
			if num_samps < 2: self[T_PER_DIV_KEY] = common.get_clean_incr(self[T_PER_DIV_KEY])
			#num samps in bounds, plot each waveform
			elif num_samps <= len(sampleses[0]):
				for i, samples in enumerate(sampleses):
					#plot samples
					self.plotter.set_waveform(
						channel='Ch%d'%(i+1),
						samples=samples[samps_off:num_samps+samps_off],
						color_spec=CHANNEL_COLOR_SPECS[i],
						marker=self[common.index_key(MARKER_KEY, i)],
						trig_off=self.trigger_offset,
					)
			#turn XY channel off
			self.plotter.clear_waveform(channel='XY')
		#keep trigger level within range
		if self[TRIGGER_LEVEL_KEY] > self.get_y_max():
			self[TRIGGER_LEVEL_KEY] = self.get_y_max(); return
		if self[TRIGGER_LEVEL_KEY] < self.get_y_min():
			self[TRIGGER_LEVEL_KEY] = self.get_y_min(); return
		#disable the trigger channel
		if not self[TRIGGER_SHOW_KEY] or self[XY_MODE_KEY] or self[TRIGGER_MODE_KEY] == wxgui.TRIG_MODE_FREE:
			self.plotter.clear_waveform(channel='Trig')
		else: #show trigger channel
			trigger_level = self[TRIGGER_LEVEL_KEY]
			trigger_point = (len(self.sampleses[0])-1)/self.get_actual_rate()/2.0
			self.plotter.set_waveform(
				channel='Trig',
				samples=(
					[self.get_t_min(), trigger_point, trigger_point, trigger_point, trigger_point, self.get_t_max()],
					[trigger_level, trigger_level, self.get_y_max(), self.get_y_min(), trigger_level, trigger_level]
				),
				color_spec=TRIGGER_COLOR_SPEC,
			)
		#update the plotter
		self.plotter.update()
Ejemplo n.º 6
0
	def __init__(
		self,
		parent,
		controller,
		size,
		title,
		frame_rate,
		num_inputs,
		sample_rate_key,
		t_scale,
		v_scale,
		v_offset,
		xy_mode,
		ac_couple_key,
		trigger_level_key,
		trigger_mode_key,
		trigger_slope_key,
		trigger_channel_key,
		decimation_key,
		msg_key,
                use_persistence,
                persist_alpha,
		trig_mode,
		y_axis_label,
	):
		pubsub.__init__(self)
		#check num inputs
		assert num_inputs <= len(CHANNEL_COLOR_SPECS)
		#setup
		self.sampleses = None
		self.num_inputs = num_inputs
		autorange = not v_scale
		self.autorange_ts = 0
		v_scale = v_scale or 1
		self.frame_rate_ts = 0
		#proxy the keys
		self.proxy(MSG_KEY, controller, msg_key)
		self.proxy(SAMPLE_RATE_KEY, controller, sample_rate_key)
		self.proxy(TRIGGER_LEVEL_KEY, controller, trigger_level_key)
		self.proxy(TRIGGER_MODE_KEY, controller, trigger_mode_key)
		self.proxy(TRIGGER_SLOPE_KEY, controller, trigger_slope_key)
		self.proxy(TRIGGER_CHANNEL_KEY, controller, trigger_channel_key)
		self.proxy(DECIMATION_KEY, controller, decimation_key)
		#initialize values
		self[RUNNING_KEY] = True
		self[XY_MARKER_KEY] = 2.0
		self[CHANNEL_OPTIONS_KEY] = 0
		self[XY_MODE_KEY] = xy_mode
		self[X_CHANNEL_KEY] = 0
		self[Y_CHANNEL_KEY] = 1
		self[AUTORANGE_KEY] = autorange
		self[T_PER_DIV_KEY] = t_scale
		self[X_PER_DIV_KEY] = v_scale
		self[Y_PER_DIV_KEY] = v_scale
		self[T_OFF_KEY] = 0
		self[X_OFF_KEY] = v_offset
		self[Y_OFF_KEY] = v_offset
		self[T_DIVS_KEY] = 8
		self[X_DIVS_KEY] = 8
		self[Y_DIVS_KEY] = 8
		self[Y_AXIS_LABEL] = y_axis_label
		self[FRAME_RATE_KEY] = frame_rate
		self[TRIGGER_LEVEL_KEY] = 0
		self[TRIGGER_CHANNEL_KEY] = 0
		self[TRIGGER_MODE_KEY] = trig_mode

		self[TRIGGER_SLOPE_KEY] = wxgui.TRIG_SLOPE_POS
		self[T_FRAC_OFF_KEY] = 0.5
		self[USE_PERSISTENCE_KEY] = use_persistence
		self[PERSIST_ALPHA_KEY] = persist_alpha

		if self[TRIGGER_MODE_KEY] == wxgui.TRIG_MODE_STRIPCHART:
			self[T_FRAC_OFF_KEY] = 0.0

		for i in range(num_inputs):
			self.proxy(common.index_key(AC_COUPLE_KEY, i), controller, common.index_key(ac_couple_key, i))
		#init panel and plot
		wx.Panel.__init__(self, parent, style=wx.SIMPLE_BORDER)
		self.plotter = my_plotter(self)
		self.plotter.SetSize(wx.Size(*size))
		self.plotter.SetSizeHints(*size)
		self.plotter.set_title(title)
		self.plotter.enable_legend(True)
		self.plotter.enable_point_label(True)
		self.plotter.enable_grid_lines(True)
                self.plotter.set_use_persistence(use_persistence)
                self.plotter.set_persist_alpha(persist_alpha)
		#setup the box with plot and controls
		self.control_panel = scope_window.control_panel(self)
		main_box = wx.BoxSizer(wx.HORIZONTAL)
		main_box.Add(self.plotter, 1, wx.EXPAND)
		main_box.Add(self.control_panel, 0, wx.EXPAND)
		self.SetSizerAndFit(main_box)
		#register events for message
		self.subscribe(MSG_KEY, self.handle_msg)
		#register events for grid
		for key in [common.index_key(MARKER_KEY, i) for i in range(self.num_inputs)] + [
			TRIGGER_LEVEL_KEY, TRIGGER_MODE_KEY,
			T_PER_DIV_KEY, X_PER_DIV_KEY, Y_PER_DIV_KEY,
			T_OFF_KEY, X_OFF_KEY, Y_OFF_KEY,
			T_DIVS_KEY, X_DIVS_KEY, Y_DIVS_KEY,
			XY_MODE_KEY, AUTORANGE_KEY, T_FRAC_OFF_KEY,
			TRIGGER_SHOW_KEY, XY_MARKER_KEY, X_CHANNEL_KEY, Y_CHANNEL_KEY,
		]: self.subscribe(key, self.update_grid)
                #register events for plotter settings
		self.subscribe(USE_PERSISTENCE_KEY, self.plotter.set_use_persistence)
		self.subscribe(PERSIST_ALPHA_KEY, self.plotter.set_persist_alpha)
		#initial update
		self.update_grid()