I am trying to drag and drop a button, with the following code in wxPython, however, the drag flickers, and feels jarring, and I'm not sure why -- or how to fix it. I've pored over the wxWidgets docs, but can't seem to find out what the problem is. Thanks in advance!
import wx
app = wx.App(False)
d = {}
def wMouseDown(e):
print "!!!", e.GetEventObject()
def MouseDown(e):
o = e.GetEventObject()
sx,sy = panel.ScreenToClient(o.GetPositionTuple())
dx,dy = panel.ScreenToClient(wx.GetMousePosition())
o._x,o._y = (sx-dx, sy-dy)
d['d'] = o
def MouseMove(e):
try:
if 'd' in d:
o = d['d']
x, y = wx.GetMousePosition()
o.SetPosition(wx.Point(x+o._x,y+o._y))
except: pass
def MouseUp(e):
try:
if 'd' in d: del d['d']
except: pass
frame = wx.Frame(None, -1, 'simple.py')
panel = wx.Panel(frame)
box = wx.BoxSizer(wx.VERTICAL)
button1 = wx.Button(panel, -1, "foo")
box.Add(button1, 0, wx.ALL, 10)
button2 = wx.Button(panel, -1, "bar")
box.Add(button2, 0, wx.ALL, 10)
button1.Bind(wx.EVT_LEFT_DOWN, MouseDown)
button2.Bind(wx.EVT_LEFT_DOWN, MouseDown)
button1.Bind(wx.EVT_MOTION, MouseMove)
button2.Bind(wx.EVT_MOTION, MouseMove)
button1.Bind(wx.EVT_LEFT_UP, MouseUp)
button2.Bind(wx.EVT_LEFT_UP, MouseUp)
panel.Bind(wx.EVT_MOTION, MouseMove)
panel.Bind(wx.EVT_LEFT_UP, MouseUp)
panel.SetSizer(box)
panel.Layout()
frame.Show()
app.MainLoop()