diff --git a/Demo_NonBlocking_Form.py b/Demo_NonBlocking_Form.py index 29c5b9d8..d388a7a6 100644 --- a/Demo_NonBlocking_Form.py +++ b/Demo_NonBlocking_Form.py @@ -1,11 +1,48 @@ import PySimpleGUI as sg import time -def main(): - StatusOutputExample() - StatusOutputExample_context_manager() + + # form that doen't block +# good for applications with an loop that polls hardware +def StatusOutputExample(): + # Make a form, but don't use context manager + form = sg.FlexForm('Running Timer', auto_size_text=True) + # Create a text element that will be updated with status information on the GUI itself + output_element = sg.Text('', size=(8, 2), font=('Helvetica', 20)) + # Create the rows + form_rows = [[sg.Text('Non-blocking GUI with updates')], + [output_element], + [sg.SimpleButton('Quit')]] + # Layout the rows of the form and perform a read. Indicate the form is non-blocking! + form.LayoutAndRead(form_rows, non_blocking=True) + + # + # Some place later in your code... + # You need to perform a ReadNonBlocking on your form every now and then or + # else it won't refresh. + # + # your program's main loop + i=0 + while (True): + # This is the code that reads and updates your window + output_element.Update('{:02d}:{:02d}.{:02d}'.format((i // 100) // 60, (i // 100) % 60, i % 100)) + button, values = form.ReadNonBlocking() + if values is None or button == 'Quit': + break + i += 1 + # Your code begins here + time.sleep(.01) + + # Broke out of main loop. Close the window. + form.CloseNonBlockingForm() + + + +# This design pattern follows the uses a context manager to better control the resources +# It may not be realistic to use a context manager within an embedded (Pi) environment +# If on a Pi, then consider the above design patterns instead def StatusOutputExample_context_manager(): with sg.FlexForm('Running Timer', auto_size_text=True) as form: output_element = sg.Text('', size=(8, 2), font=('Helvetica', 20)) @@ -24,35 +61,10 @@ def StatusOutputExample_context_manager(): else: form.CloseNonBlockingForm() - -# form that doen't block -def StatusOutputExample(): - # Make a form, but don't use context manager - form = sg.FlexForm('Running Timer', auto_size_text=True) - # Create a text element that will be updated with status information on the GUI itself - output_element = sg.Text('', size=(8, 2), font=('Helvetica', 20)) - # Create the rows - form_rows = [[sg.Text('Non-blocking GUI with updates')], - [output_element], - [sg.SimpleButton('Quit')]] - # Layout the rows of the form and perform a read. Indicate the form is non-blocking! - form.LayoutAndRead(form_rows, non_blocking=True) - - # - # Some place later in your code... - # You need to perform a ReadNonBlocking on your form every now and then or - # else it won't refresh - # - - for i in range(1, 1000): - output_element.Update('{:02d}:{:02d}.{:02d}'.format((i // 100) // 60, (i // 100) % 60, i % 100)) - button, values = form.ReadNonBlocking() - if values is None or button == 'Quit': - break - time.sleep(.01) - else: - form.CloseNonBlockingForm() - +def main(): + StatusOutputExample() + sg.MsgBox('End of non-blocking demonstration') + # StatusOutputExample_context_manager() if __name__ == '__main__':