我想扩展颜色选择器窗口小部件并为其添加一些当前缺少的新功能。目前,ExtJS颜色选择器允许我们仅从预定义颜色中进行选择。我想添加一些功能,例如添加<canvas>
元素,它将呈现色谱,用户将能够选择自定义颜色,能够提供RGB或十六进制格式的颜色值等。
我试图直接从Ext.Component
类扩展,但后来我没有得到ExtJS颜色选择器提供的默认功能。
那么有人可以告诉我如何扩展ExtJS的当前小部件并添加新功能吗?
提前致谢!!!
答案 0 :(得分:2)
最简单的方法是将它全部打包到一个扩展fieldcontainer的字段以及字段mixin。这是一个例子(简单地输入,完全未经测试!)。我认为只要您只使用本机布局的本机组件,就不需要重写渲染。
Ext.define('Ext.ux.form.field.AdvancedPicker', {
extend: 'Ext.form.FieldContainer',
mixins: {
field: 'Ext.form.field.Field'
},
alias: 'widget.advancedpicker',
layout: 'hbox',
width: 200,
height: 22,
combineErrors: true,
msgTarget: 'side',
pickerCfg: null,
textfieldCfg: null,
initComponent: function () {
var me = this;
if (!me.pickerCfg) me.pickerCfg = {};
if (!me.textfieldCfg) me.textfieldCfg = {};
me.buildField();
me.callParent();
me.pickerField = me.down('picker')
me.textField = me.down('textfield')
me.initField();
},
//@private
buildField: function () {
var me = this;
me.items = [
Ext.apply({
xtype: 'picker',
submitValue: false, // this one shouldn't get submitted
width: 100,
flex: 2
}, me.pickerCfg),
Ext.apply({
xtype: 'textfield',
submitValue: false, // this one shouldn't get submitted
width: 80,
flex: 1
}, me.textfieldCfg)]
},
getValue: function () {
var me = this,
value;
// getting the value form the nested fields
return value;
},
setValue: function (value) {
var me = this;
// setting the values to the nested fields
},
getSubmitData: function () {
var me = this,
data = null;
// getting the value form the nested field which should get submit in formatted manner (if needed. otherwise just call getValue())
return data;
}
});