I solved, with the following code, where "btn_feed_100" is a GtkButton widget and "extr_scale" is a SpeedControl widget. Thanks
Code:
#!/usr/bin/env python
import linuxcnc
import os
import hal
import hal_glib
class HandlerClass:
def on_btn_feed_100_clicked(self,data=None):
self.extr_scale.set_value(float(100)) # set the widget value to 100
self.extr_scale.queue_draw() # force a widget redraw
def __init__(self, halcomp,builder,useropts):
self.builder = builder
# hal pin with change callback.
# When the pin's value changes the callback is executed.
self.extr_scale = self.builder.get_object('extr_scale')
self.btn_feed_100 = self.builder.get_object('btn_feed_100')
def get_handlers(halcomp,builder,useropts):
return [HandlerClass(halcomp,builder,useropts)]
