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  • ExtJS中listener方法和handler方法的区别

    listener方法和handler方法的区别在文档中的说明的太玄乎了,看不懂

    listeners监听能够对一个click Event事件添加任意多个的事件响应处理函数

    而handler处理只能够通过处理函数一次处理点击响应

    Ext.create('Ext.Button', {
        text    : 'Dynamic Handler Button',
        renderTo: Ext.getBody(),
        handler : function() {
            // this button will spit out a different number every time you click it.
            // so firstly we must check if that number is already set:
            if (this.clickCount) {
                // looks like the property is already set, so lets just add 1 to that number and alert the user
                this.clickCount++;
                alert('You have clicked the button "' + this.clickCount + '" times.
    
    Try clicking it again..');
            } else {
                // if the clickCount property is not set, we will set it and alert the user
                this.clickCount = 1;
                alert('You just clicked the button for the first time!
    
    Try pressing it again..');
            }
        }
    });
    new Ext.panel.Panel({
         400,
        height: 200,
        dockedItems: [{
            xtype: 'toolbar'
        }],
        listeners: {
            click: {
                element: 'el', //bind to the underlying el property on the panel
                fn: function(){ console.log('click el'); }
            },
            dblclick: {
                element: 'body', //bind to the underlying body property on the panel
                fn: function(){ console.log('dblclick body'); }
            }
        }
    });

    -------------------------------------------------------------------------------------------------------------------------------------------

    官方说法可以点击此处

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  • 原文地址:https://www.cnblogs.com/gwcyulong/p/7182919.html
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