Programming course with PySimpleGUI lessons

ProgrammingClassExamples/4b PSG (Spinner and combo) .py

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+#PySimple examples (v 3.8)
+#Tony Crewe
+#Sep 2018
+
+import PySimpleGUI as sg
+sg.SetOptions(font= ('Calibri', 12, 'bold'))       
+
+layout = [
+    [sg.Text('Spinner and Combo box demo', font = ('Calibri', 14, 'bold'))],
+    [sg.Spin([sz for sz in range (-9,10)], initial_value = 0),
+    sg.Spin([sz for sz in range (-9,10)], initial_value = 0),
+    sg.Text('Pick operation', size = (13,1)),
+    sg.InputCombo(['Add','Subtract','Multiply','Divide'], size = (8,6))],
+    [sg.Text('Result:   ')],[sg.InputText(size = (6,1), key = 'result'),
+     sg.ReadButton('Calculate', button_color = ('White', 'Red'))]]
+
+window = sg.Window('Enter & Display Data', grab_anywhere=False).Layout(layout)
+
+while True:
+    button, value = window.Read()
+
+    if button is not None:
+        val = [int(value[0]), int(value[1])]
+        if value[2] == 'Add':
+            result = val[0] + val[1]
+        elif value[2] == 'Multiply':
+            result = val[0] * val[1]
+        elif value[2] == 'Subtract':
+            result = val[0] - val[1]
+        elif value[2] == 'Divide':
+            if val[1] ==0:
+                sg.Popup('Second value can\'t be zero')
+                result = 'NA'
+            else:
+                result = round( val[0] / val[1], 3)
+        window.FindElement('result').Update(result)              
+    else:
+        break