hide the titlebar，HOW to move the Window

[maxwangwyf]

def start_move(event):
global x_offset, y_offset
x_offset = event.x
y_offset = event.y
def stop_move(event):
global x_offset, y_offset
x_offset = None
y_offset = None

def on_drag(event):
global x_offset, y_offset
if x_offset is not None and y_offset is not None:
app.geometry(f"+{event.x_root - x_offset}+{event.y_root - y_offset}")
app.bind('', start_move)#标题栏拖动效果
app.bind('', on_drag)
app.bind('', stop_move)

this is a way to move the window，but many bugs