New demo - add and delete rows from layouts. Based on the Fed Ex Package Tracker Demo Program

DemoPrograms/Demo_Layout_Add_and_Delete_Rows.py

@@ -0,0 +1,68 @@
+import PySimpleGUI as sg
+
+"""
+    Demo - Add and "Delete" Rows from a window
+
+    This is cut-down version of the Fed-Ex package tracking demo
+
+    The purpose is to show a technique for making windows that grow by clicking an "Add Row" button
+    Each row can be individually "deleted".
+
+    The reason for using the quotes are "deleted" is that the elements are simply hidden.  The effect is the same as deleting them.
+
+    Copyright 2022 PySimpleGUI
+"""
+
+
+def item_row(item_num):
+    """
+    A "Row" in this case is a Button with an "X", an Input element and a Text element showing the current counter
+    :param item_num: The number to use in the tuple for each element
+    :type:           int
+    :return:         List
+    """
+    row =  [sg.pin(sg.Col([[sg.B(sg.SYMBOL_X, border_width=0, button_color=(sg.theme_text_color(), sg.theme_background_color()), k=('-DEL-', item_num), tooltip='Delete this item'),
+                            sg.In(size=(20,1), k=('-DESC-', item_num)),
+                            sg.T(f'Key number {item_num}', k=('-STATUS-', item_num))]], k=('-ROW-', item_num)))]
+    return row
+
+
+def make_window():
+
+    layout = [  [sg.Text('Add and "Delete" Rows From a Window', font='_ 15')],
+                [sg.Col([item_row(0)], k='-TRACKING SECTION-')],
+                [sg.pin(sg.Text(size=(35,1), font='_ 8', k='-REFRESHED-',))],
+                [sg.T(sg.SYMBOL_X, enable_events=True, k='Exit', tooltip='Exit Application'), sg.T('↻', enable_events=True, k='Refresh',  tooltip='Save Changes & Refresh'), sg.T('+', enable_events=True, k='Add Item', tooltip='Add Another Item')]]
+
+    right_click_menu = [[''], ['Add Item',  'Edit Me', 'Version']]
+
+    window = sg.Window('Window Title', layout,  right_click_menu=right_click_menu, use_default_focus=False, font='_ 15', metadata=0)
+
+    return window
+
+
+def main():
+
+    window = make_window()
+    while True:
+        event, values = window.read()     # wake every hour
+        print(event, values)
+        if event == sg.WIN_CLOSED or event == 'Exit':
+            if event == 'Exit':
+                sg.user_settings_set_entry('-location-', window.current_location())
+            break
+        if event == 'Add Item':
+            window.metadata += 1
+            window.extend_layout(window['-TRACKING SECTION-'], [item_row(window.metadata)])
+        elif event == 'Edit Me':
+            sg.execute_editor(__file__)
+        elif event == 'Version':
+            sg.popup_scrolled(__file__, sg.get_versions(), location=window.current_location(), keep_on_top=True, non_blocking=True)
+        if isinstance(event, tuple):
+            if event[0] == '-DEL-':
+                window[('-ROW-', event[1])].update(visible=False)
+    window.close()
+
+
+if __name__ == '__main__':
+    main()