Prevent wxPython event from getting multiple windows?

My wxPython application uses wx.ScrolledWindow for the main drawing area - taken directly from the demo and hacked into my needs. When the user double-clicks in the scroll pane, I want to open a dialog box (possibly modal) for editing the parameters of the things they painted. Therefore, I brought the dialogue through the code from another demo:

    def OnLeftDoubleClickEvent(self, event):
    dlg = TestDialog(self, -1, "Sample Dialog", size=(350, 200),
                     #style=wx.CAPTION | wx.SYSTEM_MENU | wx.THICK_FRAME,
                     style=wx.DEFAULT_DIALOG_STYLE, # & ~wx.CLOSE_BOX
                     )
    dlg.CenterOnScreen()

    # this does not return until the dialog is closed.
    val = dlg.ShowModal()

This is just a test, of course. The dialogue itself was defined in one of the demonstrations. In any case, after closing the pop-up window, ScrolledArea moves to a new position, and in Windows mouse events are no longer displayed in the correct coordinates. The offset only happens if you move the popup in such a way that you click the mouse outside the scroll area to close it. Keep in mind that OK and Cancel are in a completely different dialog box than the scroll area. On Linux, the scrolled area appears to move depending on how far outside the area the mouse clicked - and in the same direction. In Windows, the scrolled area moves and gets confused - further mouse clicks will also force it out and (because?) The click is recorded in the wrong place.

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EDIT3

, : ScrolledWindow.py , :

from Dialog import *

MyCanvas :

self.Bind(wx.EVT_LEFT_DCLICK, self.OnLeftDoubleClickEvent)

( Dialog):

    def OnLeftDoubleClickEvent(self, event):
    useMetal = False
    if 'wxMac' in wx.PlatformInfo:
        useMetal = self.cb.IsChecked()

    dlg = TestDialog(self, -1, "Sample Dialog", size=(350, 200),
                     #style=wx.CAPTION | wx.SYSTEM_MENU | wx.THICK_FRAME,
                     style=wx.DEFAULT_DIALOG_STYLE, # & ~wx.CLOSE_BOX,
                     useMetal=useMetal,
                     )
    dlg.CenterOnScreen()

    # this does not return until the dialog is closed.
    val = dlg.ShowModal()

    if val == wx.ID_OK:
        self.log.WriteText("You pressed OK\n")
    else:
        self.log.WriteText("You pressed Cancel\n")

    dlg.Destroy()

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