Merge pull request #2205 from PySimpleGUI/Dev-latest

New demo showing how to create an Excel-like table and use arrow keys…

DemoPrograms/Demo_Table_Simulation_Arrow_Keys.py

@@ -0,0 +1,43 @@
+import PySimpleGUI as sg
+
+"""
+    Another simple table created from Input Text Elements.  This demo adds the ability to "navigate" around the drawing using
+    the arrow keys. The tab key works automatically, but the arrow keys are done in the code below.
+"""
+
+MAX_COLS = MAX_ROWS = 5
+
+sg.change_look_and_feel('Dark Brown 1')     # No excuse for gray windows
+
+# Create an Excel style window layout quickly and easily using list comprehensions
+layout =  [[sg.Text(' '*11)]+[sg.Text(s+ ' '*19) for s in 'ABCDE'] ] + \
+          [[sg.T(r)] + [sg.Input('0', justification='r', key=(r,c)) for c in range(MAX_COLS)] for r in range(MAX_ROWS)] + \
+          [[sg.Button('Table Values'), sg.Button('Exit')]]
+
+# Create the window and show it
+window = sg.Window('A Table Simulation', layout, default_element_size=(12,1), element_padding=(1,1), return_keyboard_events=True)
+current_cell = (0,0)
+while True:             # Event Loop
+    event, values = window.read()
+    if event in (None, 'Exit'):         # If user closed the window
+        break
+    current_cell = window.find_element_with_focus().Key
+    r,c = current_cell
+    # Process arrow keys
+    if event.startswith('Down'):
+        r = r + 1 * (r < MAX_ROWS-1)
+    if event.startswith('Left'):
+        c = c - 1 *(c > 0)
+    if event.startswith('Right'):
+        c = c + 1 *(c < MAX_COLS-1)
+    if event.startswith('Up'):
+        r = r - 1 * (r > 0)
+    # if the current cell changed, set focus on new cell
+    if current_cell != (r,c):
+      current_cell = r,c
+      window[current_cell].set_focus()              # set the focus on the element moved to
+      window[current_cell].update(select=True)      # when setting focus, also highlight the data in the element so typing overwrites
+    # if clicked button to dump the table's values
+    if event == 'Table Values':
+      table = [[values[(row,col)] for col in range(MAX_COLS)] for row in range(MAX_ROWS)]
+      print(f'table = {table}')