wx鼠标拖动事件

#coding:UTF-
import wx  

app = wx.App()
def dragEVT(event):
    if event.ButtonDown():
        panel1.SetPosition(event.GetPosition())
    elif event.Dragging():
        panel1.SetPosition(event.GetPosition())
    elif event.ButtonUp():
        panel1.SetPosition(event.GetPosition())  

frame = wx.Frame(None, -, "Hello World")
page1BoxSizer = wx.BoxSizer(wx.HORIZONTAL)
frame.SetSizer(page1BoxSizer)
panel1 = wx.Panel(frame,wx.ID_ANY,size = wx.Size(,))
panel1.SetBackgroundColour("#aa0000")
frame.Bind(wx.EVT_MOUSE_EVENTS,dragEVT)  

frame.Show()
app.MainLoop()