How to confirm if user has pressed on a button in pysimplegui - python-3.8

Question

I want the Predict Risk button to work only if one of the above buttons have been pressed before.
The code for the ui is as follows:
layout=[[sg.Text('Choose the Industry')],
[sg.Button("Automobile"),sg.Button("Chemical"),sg.Button("Engineering/Consulting"),
sg.Button("FMCG"),sg.Button("Healthcare/Hospitality"),sg.Button("Infrastructue")],
[sg.Button("IT/Comm/DC"),sg.Button("Manufacturing"),sg.Button("Mines"),
sg.Button("Energy/Oil & Gas"),sg.Button("Pharma"),sg.Button("Retail"),sg.Button("Cement")],
[sg.Text(size=(50,1),key=('loaded'))],
[sg.Text('Enter Observation/Recommendation: ', size =(26, 1)), sg.InputText()],
[sg.Button("Predict Risk")],
[sg.Text(size=(30,1),key=('output'))],
[sg.Text('If the above prediction is correct select \'yes\' else select the correct risk.')],
[sg.Button("Yes"),sg.Button("Low"),sg.Button("Medium")],
#[sg.Text('Select the correct risk: '),sg.Button("Low"),sg.Button("Medium")],
[sg.Text(size=(30,2),key=('trained'))],
[sg.Button("Exit"),sg.Button("Clear Fields")]
]
window=sg.Window("Risk Predictor",layout)
while True:
event, values = window.read()
#obs=values[0]
# End program if user closes window or
if event == sg.WIN_CLOSED or event == 'Exit':
break
window.close()
The above code is not complete.
I want the rest of application to be active only when the one of the top buttons has been pressed.
Secondly is there a way to map the enter key with Predict Risk button so user can just hit enter and get the prediction.

Answer 1

You can use variables or attribute button.metadata to record the state clicked for buttons. Initial value for each button is set by option metadata=False in sg.Button means not yet clicked. When button clicked, button.metadata will be set to True, it means this button clicked.
Here show the way to record the clicked state in button.metadata.
import PySimpleGUI as sg
items = [
"Automobile", "Chemical", "Engineering/Consulting", "FMCG",
"Healthcare/Hospitality", "Infrastructue", "IT/Comm/DC", "Manufacturing",
"Mines", "Energy/Oil & Gas", "Pharma", "Retail", "Cement",
]
length = len(items)
size = (max(map(len, items)), 1)
sg.theme("DarkBlue3")
sg.set_options(font=("Courier New", 11))
column_layout = []
line = []
num = 4
for i, item in enumerate(items):
line.append(sg.Button(item, size=size, metadata=False))
if i%num == num-1 or i==length-1:
column_layout.append(line)
line = []
layout = [
[sg.Text('Choose the Industry')],
[sg.Column(column_layout)],
[sg.Text(size=(50,1),key=('loaded'))],
[sg.Text('Enter Observation/Recommendation: ', size =(26, 1)), sg.InputText()],
[sg.Button("Predict Risk", bind_return_key=True)],
[sg.Text(size=(30,1),key=('output'))],
[sg.Text('If the above prediction is correct select \'yes\' else select the correct risk.')],
[sg.Button("Yes"),sg.Button("Low"),sg.Button("Medium")],
[sg.Text(size=(30,2),key=('trained'))],
[sg.Button("Exit"),sg.Button("Clear Fields")]
]
window=sg.Window("Risk Predictor", layout, use_default_focus=False, finalize=True)
for key in window.key_dict: # Remove dash box of all Buttons
element = window[key]
if isinstance(element, sg.Button):
element.block_focus()
while True:
event, values = window.read()
if event in (sg.WIN_CLOSED, 'Exit'):
break
elif event in items:
window[event].metadata = True
elif event == "Predict Risk" and window["Mines"].metadata:
print("Predict Risk for Mines")
window.close()