Ext.form.DisplayField扩展组件：在formpanel中显示html格式的内容
翻遍所有ExtJs 2.2的form组件，竟没有合适的显示html格式内容的组件，唯有htmleditor组件式用来编辑html格式内容的，但用来显示的话超链接就没法点了，发挥搜索十八般武艺无果。最有自己来改写了一下原来的Ext.form.Field组件变成Ext.form.DisplayField组件（该组件在ExtJs 3.2里默认支持）。
Ext.form.DisplayField组件源码：
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Ext.form.DisplayField = Ext.extend(Ext.BoxComponent, { /** * @cfg {String/Object} autoCreate A DomHelper element spec, or true for a default element spec (defaults to * {tag: "div", style:"overflow-y:scroll;padding:3px 3px 3px 0;"}, */ defaultAutoCreate : {tag: "div", style:"overflow-y:scroll;padding:3px;"}, /** * @cfg {String} fieldClass The default CSS class for the field (defaults to "x-form-field") */ fieldClass : "x-form-field x-form-text", // private isFormField : true, // private hasFocus : false, // private initComponent : function(){ Ext.form.DisplayField.superclass.initComponent.call(this); }, /** * Returns the name attribute of the field if available * @return {String} name The field name */ getName: function(){ return this.name; }, // private onRender : function(ct, position){ Ext.form.DisplayField.superclass.onRender.call(this, ct, position); if(!this.el){ var cfg = this.getAutoCreate(); if(!cfg.name){ cfg.name = this.name || this.id; } if(this.inputType){ cfg.type = this.inputType; } this.name = cfg.name; this.el = ct.createChild(cfg, position); } this.el.addClass([this.fieldClass, this.cls]); }, // private initValue : function(){ if(this.value !== undefined){ this.setValue(this.value); } // reference to original value for reset this.originalValue = this.getValue(); }, /** * Returns true if this field has been changed since it was originally loaded and is not disabled. */ isDirty : function() { return false; }, // private afterRender : function(){ Ext.form.DisplayField.superclass.afterRender.call(this); this.initValue(); }, // private fireKey : Ext.emptyFn, reset : function(){ this.setValue(this.originalValue); }, isValid : function(preventMark){ return true; }, validate : function(){ return true; }, // protected - should be overridden by subclasses if necessary to prepare raw values for validation processValue : function(value){ return value; }, // private // Subclasses should provide the validation implementation by overriding this validateValue : function(value){ return true; }, /** * Returns the raw data value which may or may not be a valid, defined value. To return a normalized value see {@link #getValue}. * @return {Mixed} value The field value */ getRawValue : function(){ var v = this.rendered ? this.el.getValue() : Ext.value(this.value, ''); if(v === this.emptyText){ v = ''; } return v; }, /** * Returns the normalized data value (undefined or emptyText will be returned as ''). To return the raw value see {@link #getRawValue}. * @return {Mixed} value The field value */ getValue : function(){ if(!this.rendered) { return this.value; } var v = this.el.getValue(); if(v === this.emptyText || v === undefined){ v = ''; } return v; }, /** * Sets the underlying DOM field's value directly, bypassing validation. To set the value with validation see {@link #setValue}. * @param {Mixed} value The value to set * @return {Mixed} value The field value that is set */ setRawValue : function(v){ return this.el.dom.value = (v === null || v === undefined ? '' : v); }, /** * Sets a data value into the field and validates it. To set the value directly without validation see {@link #setRawValue}. * @param {Mixed} value The value to set */ setValue : function(v){ this.value = v; if(this.rendered){ this.el.dom.innerHTML = (v === null || v === undefined ? '' : v); } }, // private adjustSize : function(w, h){ var s = Ext.form.DisplayField.superclass.adjustSize.call(this, w, h); s.width = this.adjustWidth(this.el.dom.tagName, s.width); return s; }, // private adjustWidth : Ext.emptyFn }); Ext.reg('displayfield', Ext.form.DisplayField); |
实例的HTML代码：
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Ext.form.DisplayField实例</title> <link rel="stylesheet" type="text/css" href="ext/resources/css/ext-all.css"/> <script type="text/javascript" src="ext/adapter/ext/ext-base.js"></script> <script type="text/javascript" src="ext/ext-all-debug.js"></script> <script type="text/javascript" src="Ext.form.DisplayField.js"></script> </head> <body> <div id="divForm" style="width:1000px;height:500px;overflow:hidden;"></div> <script type="text/javascript"> var fp = new Ext.form.FormPanel({ title:"表单", width:400, height:400, labelWidth:40, bodyStyle:"padding:5px;", items:[{ xtype:"textfield", name:"title", fieldLabel:"标题", anchor:"95%", value:"Ext.form.DisplayField实例" },{ xtype:"displayfield", name:"content", fieldLabel:"内容", anchor:"95%", height:80, value:"<p>该扩展可以帮助在FormPanel中显示HTML形式的内容。</p><p> </p><p><b><a href='http://witmax.cn' target='_blank'>晴枫</a></b></p>" },{ xtype:"displayfield", name:"content", fieldLabel:"内容", anchor:"95%", height:80, value:"<p>该扩展可以帮助在FormPanel中显示HTML形式的内容。</p><p> </p><p>高度超出设定会出现滚动条</p><p> </p><p> </p><p><b><a href='http://witmax.cn' target='_blank'>晴枫</a></b></p>" }] }); fp.render("divForm"); </script> </body> </html> |
以上实例对应的extjs库位于同级目录下的ext目录，效果如下：
Ext.form.DisplayField效果实例
组件及实例源码下载请点击ExtJs2.2扩展组件Ext.form.DisplayField源码
Ext.form.DisplayField组件支持用form的load方法来更新数据。
