Vadim Zeitlin 1dd102d741 Fix crash when deleting all wxTreeListCtrl items with wxGTK3 ...

GTK+ 3 (but not the generic version nor even GTK+ 2, apparently) sends
"selection changed" event from gtk_tree_model_row_deleted() when
deleting the currently selected row, which resulted in sending of
wxEVT_TREELIST_SELECTION_CHANGED events with invalid wxTreeListItem,
containing a dangling pointer, and a crash in the treelist sample when
trying to dump it.

Avoid this by clearing the model (and hence generating these events)
first and deleting the items only afterwards.

Also add a trivial unit test for wxTreeListCtrl::DeleteAllItems(), which
doesn't even allow to reproduce this bug, but is still probably better
to have than not to.

Closes #18045.

2018-01-17 10:44:28 +01:00

7.5 KiB

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