Add small interactive test scripts

test_scripts/display_pressed_keys.py

@@ -0,0 +1,31 @@
+import urwid
+import urwid.curses_display
+
+class TestWidget(urwid.WidgetWrap):
+    KEY_LIMIT = 10
+
+    def __init__(self):
+        self.last_keys = []
+        self.text = urwid.Text("No key pressed yet", align=urwid.CENTER)
+        self.filler = urwid.Filler(self.text)
+        super().__init__(self.filler)
+
+    def selectable(self):
+        return True
+
+    def keypress(self, size, key):
+        self.last_keys.append(repr(key))
+        self.last_keys = self.last_keys[-self.KEY_LIMIT:]
+        self.text.set_text("\n".join(self.last_keys))
+
+    def mouse_event(self, size, event, button, col, row, focus):
+        self.last_keys.append(f"{size!r} {event!r} {button!r} ({row}, {col})")
+        self.last_keys = self.last_keys[-self.KEY_LIMIT:]
+        self.text.set_text("\n".join(self.last_keys))
+
+def main():
+    screen = urwid.curses_display.Screen()
+    loop = urwid.MainLoop(TestWidget(), screen=screen)
+    loop.run()
+
+main()