[wxPython] Q:

wxPython Users
1

The doc for wxTreeCtrl::GetSelection says, "Returns the selection, or an
invalid item if there is no selection."
I wonder whether it would be reasonable to make this function return None
when there is no current selected item.

For example, I would like to write code that gives the selected node if there
is one, the root node otherwise.

What factors should be considered in allowing the following

  if not selected: selected = self.tree.GetRootItem ( )

for this purpose, rather than?

        if not self.tree.IsSelected ( selected ):
            selected = self.tree.GetRootItem ( )

Bill

2

The doc for wxTreeCtrl::GetSelection says, "Returns the selection, or an
invalid item if there is no selection."
I wonder whether it would be reasonable to make this function return None
when there is no current selected item.

Probably, but then it wouldn't match the docs.

For example, I would like to write code that gives the selected node if

there

is one, the root node otherwise.

What factors should be considered in allowing the following

if not selected: selected = self.tree.GetRootItem ( )

for this purpose, rather than?

        if not self.tree.IsSelected ( selected ):
            selected = self.tree.GetRootItem ( )

How about

    if not selected.IsOk(): selected = self.tree.GetRootItem ( )

···

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Robin Dunn
Software Craftsman
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