File / FileEditor no history (entries option not working)

[mo-han]

class Test(HasTraits):
    p = File(entries=10, dialog_style='open')

class Test(HasTraits):
    p = File(editor=FileEditor(entries=10, dialog_style='open'))

Neither shows the history combo box with entries=10 provided.
Then found out the source code of traitsui.editors.file_editor.FileEditor says:

    #: FIXME: add support
    entries = Int(10)

So does this mean entries option is actually not supported yet? Then why does the official document shows examples of FileEditor with history combo box?

[aaronayres35]

It looks as though this functionality is supported on the wx backend, but not for qt (hence the example shown in the documentation).
See:

traitsui/traitsui/wx/file_editor.py

Lines 62 to 67 in 974bbda

	if factory.entries > 0:
	from .history_control import HistoryControl
	self.history = HistoryControl(
	entries=factory.entries, auto_set=factory.auto_set
	)

The fact that this is currently a wx specific feature is not at all clear currently and this is a problem. It should be stated in the documentation that currently this feature is only available on wx, as well as in the comment in the source code.
Ultimately we want this functionality on qt as well, but in the mean time it needs to be clearly documented that it is not supported

Also, slightly orthogonal to this issue, the History_demo which showcases this feature is currently broken on wx. Fix coming soon.

Also note that this functionality is supported on qt for the HistoryEditor, but not for the FileEditor or DirectoryEditor.