[Discuss-gnuradio] Vector Source controlled by probe signal

I'm working on a GRC project and currently stuck with creating a custom Vector Source bloc. I want this Vector Source to reset Tags generation everytime it receives "1" from a probe. The sequence generated by Vector Source is a 128-bit pseudo radom code. image1 in attachement shows the Hier custom bloc which generates "Vector_Genator_C.py". I'm thinking of modifying Vector_Genator_C.py to include the probe signal in an if-statement and play with.stop,.wait and.stop but I honestly don't know how to do it. The input of the probe is shown in image2, the generated sequence in image3 and the desired result in image4.

Vector_Genator_C.py file is:

# -*- coding: utf-8 -*-
##################################################
# GNU Radio Python Flow Graph
# Title: Vector_Genator_C
# Author: zaki
# Description: zzz
# Generated: Tue Dec 11 10:49:22 2018
##################################################


from gnuradio import blocks
from gnuradio import gr
from gnuradio.filter import firdes
import threading
import time


class Vector_Genator_C(gr.hier_block2):

    def __init__(self,
parameter_0=0):
        gr.hier_block2.__init__(
            self, 
"Vector_Genator_C",
            gr.io_signature(1,
1, gr.sizeof_char*1),
            gr.io_signature(1,
1, gr.sizeof_gr_complex*1),
        )

        ##################################################
        # Parameters
        ##################################################
        self.parameter_0
= parameter_0

        ##################################################
        # Variables
        ##################################################
        self.samp_rate
= samp_rate = 75e3
        self.probe_control
= probe_control = 0

        ##################################################
        # Blocks
        ##################################################

        def _probe_control_probe():
            while True:
                val = self.bloc_probe_control.level()
                try:
                    self.set_probe_control(val)
                except AttributeError:
                    pass
                time.sleep(1.0 / (2e6))
        _probe_control_thread = threading.Thread(target=_probe_control_probe)
        _probe_control_thread.daemon = True
        _probe_control_thread.start()

        self.blocks_vector_source_x_0
= blocks.vector_source_c(parameter_0, True,
1, [])
        self.bloc_probe_control
= blocks.probe_signal_b()

        ##################################################
        # Connections
        ##################################################
        self.connect((self.blocks_vector_source_x_0,
0), (self,
0))
        self.connect((self,
0), (self.bloc_probe_control,
0))

    def get_parameter_0(self):
        return self.parameter_0

    def set_parameter_0(self,
parameter_0):
        self.parameter_0
= parameter_0
        self.blocks_vector_source_x_0.set_data(self.parameter_0, [])

    def get_samp_rate(self):
        return self.samp_rate

    def set_samp_rate(self,
samp_rate):
        self.samp_rate
= samp_rate

    def get_probe_control(self):
        return self.probe_control

    def set_probe_control(self,
probe_control):
        self.probe_control
= probe_control

From:	zakaria Bouhanna
Subject:	[Discuss-gnuradio] Vector Source controlled by probe signal
Date:	Tue, 11 Dec 2018 11:09:12 +0000