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def OnOpen(self, event):
if self.contentNotSaved:
if wx.MessageBox("Current content has not been saved! Proceed?", "Please confirm",
wx.ICON_QUESTION | wx.YES_NO, self) == wx.NO:
return
# otherwise ask the user what new file to open
with wx.FileDialog(self, "Open XYZ file", wildcard="XYZ files (*.xyz)|*.xyz",
style=wx.FD_OPEN | wx.FD_FILE_MUST_EXIST) as fileDialog:
if fileDialog.ShowModal() == wx.ID_CANCEL:
return # the user changed their mind
# Proceed loading the file chosen by the user
pathname = fileDialog.GetPath()
try:
with open(pathname, 'r') as file:
self.doLoadDataOrWhatever(file)
except IOError:
wx.LogError("Cannot open file '%s'." % newfile)
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