message used to reconfigure flowgraph

[Achilleas Anastasopoulos]

Hi all,

I have a flowgraph that is reconfigured using a QTgui chooser.

Essentially I generated a simple grc file with all the appropriate blocks and then edited the python file to change the "set" function of the chooser to something like:

    def set_onoff(self, onoff):
        if self._onoff_==1 and _onoff_==0:
            self._onoff_ = onoff
            self._onoff_callback(self.onoff)
            self.lock()
            print('ON-->OFF')
            self.disconnect(self.blocks_throttle2_1, self.interp_fir_filter_xxx_0)
            self.disconnect(self.interp_fir_filter_xxx_0, self.qtgui_freq_sink_x_0)
            self.connect(self.blocks_throttle2_1, self.qtgui_freq_sink_x_0)
            self.unlock()
        elif self._onoff_==0 and _onoff_==1:
            self._onoff_ = onoff
            self._onoff_callback(self.onoff)
            self.lock()
            print('OFF-->ON')
            self.disconnect(self.blocks_throttle2_1, self.qtgui_freq_sink_x_0)
            self.connect(self.blocks_throttle2_1, self.interp_fir_filter_xxx_0)
            self.connect(self.interp_fir_filter_xxx_0, self.qtgui_freq_sink_x_0)
            self.unlock()

this seems to be working fine.

Now I want to accomplish something similar with an embedded python block

that receives a message and makes this change in the flowgraph. 

The message handler function of this block should do the reconfiguration.

However, the message handling function does not have access to the 

flowgraph...

Is there a way this can be done?

thanks

Achilleas