[Dojo-interest] How to set tooltip for value in filter dialog of enhance datagrid ?

Hi, different filter conditions and value boxes are used for different data
types. e.g:
{field: 'timeValue', dataType: 'time', ...}
Then the value box will be set to dijit.form.TimeTextBox.
All supported dataTypes are: string (default), number, date, time and
boolean.
Currently there's no public method to set custom value box widget for each
dataType.

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Best Regards
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Oliver