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Is it possible to create multilevel combobox using ExtJS 4.0? I mean, that it should have, for example, these options:
This and Last options should be not selectable.
This absolutely is possible.
You can define a template for your combobox which defines how the row is displayed. What you can do is have the store have a field which defines the type of record, such as a boolean header field.
In your xTemplate which you pass into the Combobox’s tpl config, you can check the value of that field and if it’s a header apply separate styling. Then, add a beforeselect listener and if the record’s header field is true, return false.
I saw something similar on the Ext website, but can’t locate it right now. If you need more details, let me know.