CODEWITHSUNDEEP
comboboxextjs4
shaoen01
shaoen01

Reputation: 31

Extjs Combo Box get previous value?

Trying to get the previous value of the combo box. I tried 'change' event, but it does not work. 'beforeselect' does not exist for the new extjs 4.0 if i am not wrong. Any ideas on how i can do this?

I understand we can use the change event, but that only happens when the user types something. I want to check if there is an previous value on each new select?

Upvotes: 3

Views: 5567

Answers (3)

Ramya Velivala
Ramya Velivala

Reputation: 567

You can also get the previous value of the combo from valueModels of the combo object in beforeselect event.

beforeselect: function(combo, record, index, eOpts){
    me.prevCountry = combo.valueModels[0].data.COUNTRY_ID;
}

Upvotes: 3

Omid Shariati
Omid Shariati

Reputation: 1916

you can use change event handler that pass this params to your listener ( combo, newValue, oldValue )

Upvotes: 1

Molecular Man
Molecular Man

Reputation: 22386

It's kind of weird that there is no beforeselect event. However, combobox extends picker and every picker has selectionModel with beforeselect event. So you may assign handler to picker selModel's beforeselect event:

MyCombo.getPicker().getSelectionModel()
    .on('beforeselect',function(sm, selections, i) {
        console.log(sm.lastSelected, selections, i);
    });

Upvotes: 4

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