143 lines
6.3 KiB
Python
143 lines
6.3 KiB
Python
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import PySimpleGUI as sg
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import random
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import time
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import queue
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"""
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Demo - Multi-threaded "Data Pump" Design Pattern
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Send data to your PySimpleGUI program through a Python Queue, enabling integration with many
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different types of data sources.
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A thread gets data from a queue object and passes it over to the main event loop.
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The external_thread is only used here to generaate random data. It's not part of the
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overall "Design Pattern".
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The thread the_thread IS part of the design pattern. It reads data from the thread_queue and sends that
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data over to the PySimpleGUI event loop.
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Copyright 2022 PySimpleGUI
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"""
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gsize = (400, 400) # size of the graph
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THREAD_KEY = '-THREAD-'
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THREAD_INCOMING_DATA = '-INCOMING DATA-'
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THREAD_EXITNG = '-THREAD EXITING-'
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THREAD_EXTERNAL_EXITNG = '-EXTERNAL THREAD EXITING-'
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# This queue is where you will send your data that you want to eventually arrive as an event
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thread_queue = queue.Queue()
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# M""""""""M dP dP
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# Mmmm mmmM 88 88
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# MMMM MMMM 88d888b. 88d888b. .d8888b. .d8888b. .d888b88
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# MMMM MMMM 88' `88 88' `88 88ooood8 88' `88 88' `88
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# MMMM MMMM 88 88 88 88. ... 88. .88 88. .88
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# MMMM MMMM dP dP dP `88888P' `88888P8 `88888P8
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# MMMMMMMMMM
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#
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# MP""""""`MM oo dP dP oo
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# M mmmmm..M 88 88
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# M. `YM dP 88d8b.d8b. dP dP 88 .d8888b. d8888P dP 88d888b. .d8888b.
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# MMMMMMM. M 88 88'`88'`88 88 88 88 88' `88 88 88 88' `88 88' `88
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# M. .MMM' M 88 88 88 88 88. .88 88 88. .88 88 88 88 88 88. .88
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# Mb. .dM dP dP dP dP `88888P' dP `88888P8 dP dP dP dP `8888P88
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# MMMMMMMMMMM .88
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# d8888P
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# M""""""'YMM dP MP""""""`MM
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# M mmmm. `M 88 M mmmmm..M
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# M MMMMM M .d8888b. d8888P .d8888b. M. `YM .d8888b. dP dP 88d888b. .d8888b. .d8888b.
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# M MMMMM M 88' `88 88 88' `88 MMMMMMM. M 88' `88 88 88 88' `88 88' `"" 88ooood8
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# M MMMM' .M 88. .88 88 88. .88 M. .MMM' M 88. .88 88. .88 88 88. ... 88. ...
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# M .MM `88888P8 dP `88888P8 Mb. .dM `88888P' `88888P' dP `88888P' `88888P'
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# MMMMMMMMMMM MMMMMMMMMMM
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#
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def external_thread(thread_queue:queue.Queue):
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"""
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Represents some external source of data.
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You would not include this code as a starting point with this Demo Program. Your data is assumed to
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come from somewhere else. The important part is that you add data to the thread_queue
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:param thread_queue:
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:return:
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"""
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i = 0
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while True:
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time.sleep(.01)
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point = (random.randint(0,gsize[0]), random.randint(0,gsize[1]))
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radius = random.randint(10, 40)
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thread_queue.put((point, radius))
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i += 1
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# M""""""""M dP dP MM""""""""`M
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# Mmmm mmmM 88 88 MM mmmmmmmM
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# MMMM MMMM 88d888b. 88d888b. .d8888b. .d8888b. .d888b88 M' MMMM .d8888b. 88d888b.
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# MMMM MMMM 88' `88 88' `88 88ooood8 88' `88 88' `88 MM MMMMMMMM 88' `88 88' `88
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# MMMM MMMM 88 88 88 88. ... 88. .88 88. .88 MM MMMMMMMM 88. .88 88
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# MMMM MMMM dP dP dP `88888P' `88888P8 `88888P8 MM MMMMMMMM `88888P' dP
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# MMMMMMMMMM MMMMMMMMMMMM
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#
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# MM"""""""`YM MP""""""`MM MM'"""""`MM MM""""""""`M dP
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# MM mmmmm M M mmmmm..M M' .mmm. `M MM mmmmmmmM 88
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# M' .M M. `YM M MMMMMMMM M` MMMM dP .dP .d8888b. 88d888b. d8888P .d8888b.
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# MM MMMMMMMM MMMMMMM. M M MMM `M MM MMMMMMMM 88 d8' 88ooood8 88' `88 88 Y8ooooo.
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# MM MMMMMMMM M. .MMM' M M. `MMM' .M MM MMMMMMMM 88 .88' 88. ... 88 88 88 88
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# MM MMMMMMMM Mb. .dM MM. .MM MM .M 8888P' `88888P' dP dP dP `88888P'
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# MMMMMMMMMMMM MMMMMMMMMMM MMMMMMMMMMM MMMMMMMMMMMM
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def the_thread(window:sg.Window, thread_queue:queue.Queue):
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"""
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The thread that communicates with the application through the window's events.
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Waits for data from a queue and sends that data on to the event loop
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:param window:
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:param thread_queue:
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:return:
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"""
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while True:
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data = thread_queue.get()
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window.write_event_value((THREAD_KEY, THREAD_INCOMING_DATA), data) # Data sent is a tuple of thread name and counter
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def main():
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layout = [ [sg.Text('My Simulated Data Pump')],
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[sg.Multiline(size=(60, 20), k='-MLINE-')],
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[sg.Graph(gsize, (0, 0), gsize, k='-G-', background_color='gray')],
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[sg.Button('Go'), sg.Button('Exit')] ]
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window = sg.Window('Simulated Data Pump', layout, right_click_menu=sg.MENU_RIGHT_CLICK_EDITME_VER_EXIT)
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graph = window['-G-'] # type: sg.Graph
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while True: # Event Loop
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event, values = window.read()
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# print(event, values)
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if event == sg.WIN_CLOSED or event == 'Exit':
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break
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if event == 'Go':
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window.start_thread(lambda: the_thread(window, thread_queue), (THREAD_KEY, THREAD_EXITNG))
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window.start_thread(lambda: external_thread(thread_queue), (THREAD_KEY, THREAD_EXTERNAL_EXITNG))
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# Events coming from the Thread
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elif event[0] == THREAD_KEY:
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if event[1] == THREAD_INCOMING_DATA:
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point, radius = values[event]
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graph.draw_circle(point, radius=radius, fill_color='green')
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window['-MLINE-'].print(f'Drawing at {point} radius {radius}', c='white on red')
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elif event[1] == THREAD_EXITNG:
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window['-MLINE-'].print('Thread has exited')
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elif event[1] == THREAD_EXTERNAL_EXITNG:
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window['-MLINE-'].print('Data Pump thread has exited')
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if event == 'Edit Me':
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sg.execute_editor(__file__)
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elif event == 'Version':
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sg.popup_scrolled(__file__, sg.get_versions(), location=window.current_location(), keep_on_top=True, non_blocking=True)
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window.close()
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if __name__ == '__main__':
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main()
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