[Question] How to trap an event

[MikeGreen99]

Type of Issue (Enhancement, Error, Bug, Question)

Question

Operating System

ubuntu 22.04

PySimpleGUI Port (tkinter, Qt, Wx, Web)

tkinter

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Versions 5

Version information can be obtained by calling sg.main_get_debug_data()
Or you can print each version shown in ()

Python version (sg.sys.version)

3,12

PySimpleGUI Version (sg.__version__)

5

GUI Version (tkinter (sg.tclversion_detailed), PySide2, WxPython, Remi)

5

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Your Experience In Months or Years (optional)

Years Python programming experience6 months

Years Programming experience overall40 years

Have used another Python GUI Framework? (tkinter, Qt, etc) (yes/no is fine)no

Anything else you think would be helpful?

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Troubleshooting

These items may solve your problem. Please check those you've done by changing - [ ] to - [X]

• Searched main docs for your problem PySimpleGUI Documenation
• Looked for Demo Programs that are similar to your goal. It is recommend you use the Demo Browser! Demo Programs
• None of your GUI code was generated by an AI algorithm like GPT
• If not tkinter - looked for Demo Programs for specific port
• For non tkinter - Looked at readme for your specific port if not PySimpleGUI (Qt, WX, Remi)
• Run your program outside of your debugger (from a command line)
• Searched through Issues (open and closed) to see if already reported Issues.PySimpleGUI.com
• Have upgraded to the latest release of PySimpleGUI on PyPI (lastest official version)
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Detailed Description

How to Trap an event when user enters a field ?

Code To Duplicate

# Forum01.py Apr.06.2024
#  How to make an Event for the Name and Age Fields so I can validate ???
import PySimpleGUI as sg
layout = [
    [sg.Text('Name: ',justification='right',tooltip="Name 3-31 Char") ,sg.InputText(size=(31,1))],
    [sg.Text('Age:    ', justification='right', tooltip="Age 16-99"), sg.InputText(size=(3, 1))],
    [sg.Button("Update"), sg.Button("Exit")],
	]
winx = sg.Window('Simple data entry window', layout)
while True:
    event, values = winx.read() # Display Window & wait for an event
    if event == 'Exit' or event == sg.WINDOW_CLOSE_ATTEMPTED_EVENT: # Exit button or upper left X
       break
    if event == 'Name' :  # THIS DOESN'T Trap Name Entry
        print('Name Validation')
    if event == 'Age' :  # THIS DOESN'T Trap Age Entry
        print('Age Validation')
winx.close()

Screenshot, Sketch, or Drawing

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Watcha Makin?

If you care to share something about your project, it would be awesome to hear what you're building. Small home project

[jason990420]

Some options to element or sg.Window, refer Tkinter Port Call Reference

• With option enable_events=True in sg.Input element, then changes to this element are immediately reported as an event.
• With option key in sg.Input element to uniquely identifies this element.
• With option enable_close_attempted_event=True in sg.Window, then the window will not close when "X" clicked. Instead an event sg.WINDOW_CLOSE_ATTEMPTED_EVENT if returned from window.read.

Revised code

import PySimpleGUI as sg

layout = [
    [sg.Text('Name: ',justification='right',tooltip="Name 3-31 Char") ,sg.InputText(size=(31,1), enable_events=True, key="Name")],
    [sg.Text('Age:    ', justification='right', tooltip="Age 16-99"),  sg.InputText(size=(3, 1), enable_events=True, key="Age")],
    [sg.Button("Update"), sg.Button("Exit")],
    ]
winx = sg.Window('Simple data entry window', layout, enable_close_attempted_event=True)

while True:

    event, values = winx.read() # Display Window & wait for an event

    if event == 'Exit' or event == sg.WINDOW_CLOSE_ATTEMPTED_EVENT: # Exit button or upper left X
       break

    if event == 'Name' :  # THIS DOESN'T Trap Name Entry
        print('Name Validation:', values[event])

    if event == 'Age' :  # THIS DOESN'T Trap Age Entry
        print('Age Validation:', values[event])

winx.close()

[PySimpleGUI]

This Demo Program does input validation:
https://github.com/PySimpleGUI/PySimpleGUI/blob/master/DemoPrograms/Demo_Input_Validation.py

You can also run it from the eCookbook here:
https://docs.pysimplegui.com/en/latest/cookbook/ecookbook/examples/input-validation/