Create event for arrow keys in extjs

问题

How to get the char codes of the arrow keys in extjs?

I tried the below code which is working good to get the char codes of all the keyboard buttons but not the arrow keys(also Backspace).

Ext.getDoc().on('keypress', function(event, target) {
        console.log(event.getCharCode())
});

Before asking here, I have gone through the documentation which I can't understand.

and also If I press backspace then the page is redirecting to previous page. I am planning to keep my own function in future on backspace. How to override it in extjs?

I am a beginner. So, please provide simple example..

回答1:

To archive this you need to use monitoring like

instance.mon(Ext.getDoc(), Ext.EventManager.getKeyEvent(), instance.callBack, instance)

see JSFiddle (I think you can check for the right key)

回答2:

There is an example of exactly that in the documentation: http://dev.sencha.com/deploy/ext-4.1.0-gpl/examples/keynav/keynav.html

来源：https://stackoverflow.com/questions/14706218/create-event-for-arrow-keys-in-extjs