New Demo - users settings to save prior selections

DemoPrograms/Demo_User_Settings_Browse_File_Folder.py

@@ -0,0 +1,69 @@
+import PySimpleGUI as sg
+
+"""
+    Demo of a Better File / Folder Input Window
+
+    This construct is very common in PySimpleGUI.
+        [sg.InputText(size=(50,1), key='-FILENAME-'), sg.FileBrowse()],
+
+    The new user settings APIs can significantly improve the experience.  Now instead of being
+    shown a blank input element, the user is shown their previous entry and a history of their
+    prior entries to choose from.
+
+    Two new capabilities are presented in this demo
+    1. Recalling the last entry
+    2. Recalling a history of all of the previous entries as a Combo instead of Input Element
+
+    The previous operations you're used to remain.  You can paste a filename/full path into the combo.
+    You can also use the browse button as before.
+
+    But, you also get the 2 history features - last entry used, list of previous choices.
+
+    If your window is not a 1-shot, add an event loop instead of a read with close paramter
+
+    Copyright 2020 PySimpleGUI.org
+"""
+
+# ------------------- The Old Way -------------------
+
+layout = [[sg.Text('My Window')],
+          [sg.InputText(size=(50, 1), key='-FILENAME-'), sg.FileBrowse()],
+          [sg.Button('Go'), sg.Button('Exit')]]
+
+event1, values1 = sg.Window('Window Title', layout).read(close=True)
+
+# ------------------- The New Way with history -------------------
+
+layout = [[sg.Text('My Window')],
+          [sg.Combo(sg.user_settings_get_entry('-filenames-', []), default_value=sg.user_settings_get_entry('-last filename-', ''), size=(50, 1), key='-FILENAME-'),
+           sg.FileBrowse()],
+          [sg.Button('Go'), sg.Button('Exit')]]
+
+event, values = sg.Window('Window Title', layout).read(close=True)
+
+if event == 'Go':
+    sg.user_settings_set_entry('-filenames-', list(set(sg.user_settings_get_entry('-filenames-', []) + [values['-FILENAME-'], ])))
+    sg.user_settings_set_entry('-last filename-', values['-FILENAME-'])
+
+# ------------------- The New Way with history and clear -------------------
+
+layout = [[sg.Text('My Window')],
+          [sg.Combo(sg.user_settings_get_entry('-filenames-', []), default_value=sg.user_settings_get_entry('-last filename-', ''), size=(50, 1), key='-FILENAME-'),
+           sg.FileBrowse()],
+          [sg.Button('Go'), sg.B('Clear'), sg.Button('Exit')]]
+
+window = sg.Window('Window Title', layout)
+
+while True:
+    event, values = window.read()
+
+    if event == sg.WIN_CLOSED or event == 'Exit':
+        break
+    if event == 'Go':
+        sg.user_settings_set_entry('-filenames-', list(set(sg.user_settings_get_entry('-filenames-', []) + [values['-FILENAME-'], ])))
+        sg.user_settings_set_entry('-last filename-', values['-FILENAME-'])
+        window['-FILENAME-'].update(values=list(set(sg.user_settings_get_entry('-filenames-', []))))
+    elif event == 'Clear':
+        sg.user_settings_set_entry('-filenames-', [])
+        sg.user_settings_set_entry('-last filename-', '')
+        window['-FILENAME-'].update(values=[], value='')