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#!/usr/bin/env python3

import hal
import os

parameter_file = 'gladepanel_parameter.txt'

class HandlerClass:


    def on_value_changed(self,hal_spinbutton1,data=None):
        changed_value = hal_spinbutton1.get_value()
        print(':gladevcp-handler: gladevcp.hal_spinbutton1 value has changed to ', changed_value)
        f = open(parameter_file, 'w')
        f.write(str(changed_value))
        f.close()

    def __init__(self, halcomp,builder,useropts):
        self.halcomp = halcomp
        self.hal_spinbutton1 = builder.get_object("hal_spinbutton1") # builder.get_object(ID of the targeted glade object)
        self.halcomp.newpin("number", hal.HAL_FLOAT, hal.HAL_IN)
        print(':gladevcp-handler: Initialized')
        print(':gladevcp-handler: gladevcp.hal_spinbutton1 value is ', self.hal_spinbutton1.get_value())
        if os.path.isfile(parameter_file):
            with open(parameter_file) as f:
                line = f.readline()
                line_parsed = list(line.strip().split('\t'))
                value = float(line_parsed[0])
                print(':gladevcp-handler: Setting gladevcp.hal_spinbutton1 value to ', value)
                self.hal_spinbutton1.set_value(value)


def get_handlers(halcomp,builder,useropts):
    return [HandlerClass(halcomp,builder,useropts)]

EMBED_TAB_COMMAND = halcmd loadusr -Wn testpanel gladevcp -c testpanel -H ./gladevcp/testpanel.hal -x {XID} ./gladevcp/testpanel.ui

EMBED_TAB_COMMAND= halcmd loadusr -Wn testpanel gladevcp -c testpanel -u python/gladevcp-handler.py -H ./gladevcp/testpanel.hal -x {XID} ./gladevcp/testpanel.ui