DisplayEvents 

Demontrates how to handle notifications about display change when programming with ADLX.

Sample Path

/Samples/python/DisplayEvents

Code 

#<!--
# Copyright (c) 2021 - 2022 Advanced Micro Devices, Inc. All rights reserved.
#
#-------------------------------------------------------------------------------------------------
#-->

import ADLXPybind as ADLX
import time

# Callback for display list change
def callBackDisplayList(displaylist)->bool:
    print("display list changed, current display count is: ", len(displaylist))
    for index, display in enumerate(displaylist):
            name = display.name()
            print("\t index: {} name: {}".format(index, name))
            del display
    return True

# Iterate display and display event to unplug and plug the display
def displayDemo():
    # Get ADLXHelp and ADLX initialization
    adlxHelper = ADLX.ADLXHelper()
    ret = adlxHelper.Initialize()

    if(ret == ADLX.ADLX_RESULT.ADLX_OK):
        # Get systemServices
        system = adlxHelper.GetSystemServices()

        # Get displayServices
        displayService = system.GetDisplaysServices()

        # Get display change handler
        displayChangeHandler = displayService.GetDisplayChangedHandling()
        # Python call back
        callback = ADLX.DisplayListCallBack()
        callback.call = callBackDisplayList
        # Add call back
        displayChangeHandler.AddDisplayListEventListener(callback)
        print("Plug or unplug a display within 20 seconds.")
        time.sleep(20)
        # Remove call back
        displayChangeHandler.RemoveDisplayListEventListener(callback)
        # Release changeHandler interface
        del displayChangeHandler

        # Release displayService interface
        del displayService

    # Terminate ADLX
    ret = adlxHelper.Terminate()
    print("ADLX Terminate ret is: {}".format(ret))

displayDemo()