yvan-ext/src/controls/combo.js

import _ from 'lodash'
import {combo} from '../Defaults'
import {baseConfig} from "./base";

export default function () {
    const cc = Ext.form.field.ComboBox.prototype.constructor
    const {initComponent} = Ext.form.field.ComboBox.prototype
    Ext.form.field.ComboBox.override({
        constructor(config) {
            const newConfig = _.defaultsDeep({
                // 强制属性
            }, baseConfig(config, 'col-item'), config, combo)

            cc.call(this, newConfig)
        },

        initComponent() {
            this.on({
                focus: {
                    // 获得焦点后自动下拉
                    fn(sender) {
                        sender.expand();
                        this.doQuery(this.allQuery, true);
                    },
                },
            })

            initComponent.call(this)
        },

        reload() {

        }
    });
}