pywebview - Multiple monitors, Animating Frame from Default Screen[0] (on the right) to Screen[1] on the left and back

[hammadrauf]

Hi,
I have written a screen-saver like program for observing Zoneminder URL in an animated Frame. But currently it only moves on the default Screen[0] monitor. My question is, is there a way to determine which monitor is on the left and which monitor is on the right? in pywebview?

My code is at https://github.com/hammadrauf/url-monitor-saver/blob/main/url-monitor-saver.py, and also copied below for completness:

#!/usr/bin/python3
# https://pyinstaller.org/en/stable/spec-files.html#using-spec-files
## Install
# - pip install pyyaml, pywin32
# - pip install pywebview, pynput
#
import threading
from pynput import keyboard, mouse
import time
import os
import sys
import yaml
import hashlib
import win32con
import win32api
import ctypes
import webview

config_file_name = 'config-url-monitor-saver.yml'
# determine if application is a script file or frozen exe
if getattr(sys, 'frozen', False):
    application_path = os.path.dirname(sys.executable)
elif __file__:
    application_path = os.path.dirname(__file__)

config_file_path = os.path.join(application_path, config_file_name)

# tick in milli seconds, multiple of 30. Used in making Frame animation smooth.
tick=30
rtick=tick/1000

'''
Author: Hammad Rauf ([email protected])
License: MIT (Open Source, Free)
Description:
Monitors a URL in Default Browser and Act As a Screen saver turning off monitor frequently
and turning back on again. The URL and intervals for Screen-ON and Screen-Off are to be
given in as YAML text config file. This YAML file should be in the same folder as the executable
file.
ZoneMinder article: https://techbit.ca/2018/11/logging-into-zoneminder-using-an-authentication-hash/
screen_Off function is only for Windows based computers.
Sample YAML file contents:
---
  domain: "zoneminder.xyz.com"
  secret_key: "SomeRandomSecretKey-FromZoneMinder-Options"
  username: "SomeUserName"
  password_hash: "PasswordHash-From-MySQLDB-table-zoneminder"
  seconds_off: 5
  seconds_on: 8
  frame_width: 1024
  frame_height: 1000
  screenoff_enabled: False                                                     
'''
#Frame starting position
winx = 0
winy = 0

config={}
try:   
    with open(config_file_path) as stream:
        try:
            config=yaml.safe_load(stream)
        except yaml.YAMLError as exc:
            print(exc)
except:
    print(f"Config file not found at location: {config_file_path}")
    sys.exit(1)

domain=config['domain']
#base_url = f"https://{domain}/index.php?view=watch&mid=1&auth="
base_url=f"https://{domain}/index.php?view=montage&group=1&scale=0.5&auth="
secret_key = config['secret_key']
username = config['username']
password_hash = config['password_hash']
seconds_off = config['seconds_off']
seconds_on = config['seconds_on']
frame_width = config['frame_width']
frame_height = config['frame_height']
screenoff_enabled = config['screenoff_enabled']
speed_x = config['speed_x']
speed_y = config['speed_y']

def generate_auth_hash(use_remote_addr, uname=username, pwd_hash=password_hash, remote_address=domain, zm_auth_secret=secret_key):
    current_time = time.localtime()
    #print(f'User Name: {uname}')
    #print(f"time-string is = {format(current_time.tm_hour) + format(current_time.tm_mday) + format(current_time.tm_mon-1) + format(current_time.tm_year-1900)}")
    if use_remote_addr:
        auth_key = (zm_auth_secret + 
                    uname + 
                    pwd_hash + 
                    remote_address + 
                    format(current_time.tm_hour) +
                    format(current_time.tm_mday) +
                    format(current_time.tm_mon-1) +
                    format(current_time.tm_year-1900))
    else:
        auth_key = (zm_auth_secret + 
                    uname + 
                    pwd_hash + 
                    format(current_time.tm_hour) +
                    format(current_time.tm_mday) +
                    format(current_time.tm_mon-1) +
                    format(current_time.tm_year-1900))
    auth = hashlib.md5(auth_key.encode()).hexdigest()
    return auth

def screenOff():
    if screenoff_enabled:
        ctypes.windll.user32.SendMessageW(65535, 274, 61808, 2)
def screenOn():
    if screenoff_enabled:
        ctypes.windll.user32.SendMessageW(65535, 274, 61808, -1)
        moveCursor()
def moveCursor():
    x, y = (0,0)
    win32api.mouse_event(win32con.MOUSEEVENTF_MOVE, x, y)

# Generate the URL with Authentication for Display
authenticated_url = base_url+generate_auth_hash(False)

# Event to control the main loop and listeners
terminate_event = threading.Event()

def destroy(window, timeInSec):
    global speed_x, speed_y, winx, winy, rtick, tick
    for _ in range(timeInSec*tick):
        if terminate_event.is_set():
            break
        time.sleep(rtick)
        if winx + frame_width > webview.screens[0].width or winx < 0:
            speed_x = speed_x * -1
        if winy + frame_height > webview.screens[0].height or winy < 0:
            speed_y = speed_y * -1
        nx = winx + speed_x * rtick
        ny = winy + speed_y * rtick
        winx = int(nx)
        winy = int(ny)
        window.move(winx, winy)  
    window.destroy()

def on_key_event(key):
    terminate_event.set()
    return False

def on_mouse_event(x, y):
    terminate_event.set()
    return False

def keypress_listener():
    with keyboard.Listener(on_press=on_key_event) as listener:
        listener.join()

def mouse_listener():
    with mouse.Listener(on_move=on_mouse_event) as listener:
        listener.join()


try:
    # Create and start the keypress and mouse listener threads
    keyboard_listenerO = keyboard.Listener(on_press=on_key_event)
    mouse_listenerO = mouse.Listener(on_move=on_mouse_event)
    keyboard_thread = threading.Thread(target=keyboard_listenerO.start)
    mouse_thread = threading.Thread(target=mouse_listenerO.start)
    keyboard_thread.start()
    mouse_thread.start()

    # Main program code
    while not terminate_event.is_set():
        screenOn()
        mywin = webview.create_window('ZoneMinder', authenticated_url, x=winx, y=winy, 
                                    width=frame_width, height=frame_height, draggable=True)
        webview.start(destroy, (mywin, seconds_on))
        if terminate_event.is_set():
            screenOn()
            break
        
        screenOff()
        for _ in range(seconds_off*tick):
            if terminate_event.is_set():
                screenOn()
                break
            time.sleep(rtick)    

    # Stop the listeners if the program is terminating
    keyboard_listenerO.stop()
    mouse_listenerO.stop()

    # Wait for the threads to finish
    keyboard_thread.join()
    mouse_thread.join()
    # if adding threads, then join them here.

    # end.
except Exception as e:
    print(f"Error: {e}")
    sys.exit(1)
else:
    sys.exit(0)

[r0x0r]

No it cannot be done currently, but it could be made possible by storing origin coordinates in Screen instances. I will look into implementing this.

[r0x0r]

Actually there's a frame property to Screen object, which holds the native screen object for each platform. For Winforms you would get coordinates like this screen.frame.Bounds.X and screen.frame.Bounds.Y

[hammadrauf]

thanks