Extjs / Javascript - wait for MessageBox response before function return

Question

I'm working on a project with Extjs, version 4.0.7 and i have a problem. I have a function which verifies data validity before save. It looks like this:

        me.validateEmployeeSystemSettingsOnSave = function (a,b,c) { 
           switch (c) {
        case 1:{
         if(expression)
           return {success: false}
           if(expression2){
           Ext.Msg.show({
                title:'',
                    msg:'',
                buttons: Ext.Msg.YESNO,
                icon: Ext.Msg.QUESTION,
                fn: function (btn) {
                if (btn == 'yes') {
                return { success: true };
                }
                else if (btn == 'no') {
                return { success: false};
                }
                },
                modal: true
                 });
             }

      else return {success: true}; /*problem line*/ //this is the default answer, when function will 
//not enter any expression and return {success: true} 

    }
    case 2:{
    }
    }

My above function is called in an onSave function like this:

 var response = me.validateEmployeeSystemSettingsOnSave(dsa,ssa,daa){
   if(response.success){
this.save();
}
else{
}
}

My question is: Is there any way to wait for the answer of the Ext.msg.show(), before reaching the default return, which i marked with /problem line/ ? Because now the function doesn't take my yes or no answer, it always return {success: 'true'}, which is normal, taking into consideration how is the function structured.

Any ideas? Thank you!

Answer 1

You should never wait, Use a callback instead! So in your case execute a callback instead of returning { success: true };