最近的一个ExtJS(version:3.2)的项目中学习和利用了ExtJS,现在罗列如下以备忘:
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1、适用于TextField、NumberField 添加一个 sideText 标签显示在右侧如必填项的 * 号等标记
/**适用于TextField、NumberField 添加一个 sideText 标签显示在右侧如必填项的 * 号等*/ Ext.override(Ext.form.TextField, { sideText : '', onRender : function(ct, position) { Ext.form.TextField.superclass.onRender.call(this, ct, position); if (this.sideText != '' && !this.triggerAction) { this.sideEl = ct.createChild({ tag: 'div', style:'position:absolute;left:'+(this.x+this.width)+';top:'+(this.y)+';padding-left:2px;display:inline-block;display:inline;', html: this.sideText }); } if(this.readOnly){//为只读的text加上特定的样式--background-image:url('')去掉本身的背景图片 /*边框:b5b8c8 背景色:dfe8f6 background-color:#DDDDDD; border:1px*/ if(this.xtype=='numberfield'){ if(this.style){ this.style+=" text-align:right; background-color:#dfe8f6; border-color:#b5b8c8;background-image:url('')"; }else{ this.style=" text-align:right; background-color:#dfe8f6; border-color:#b5b8c8;background-image:url('')"; } } else{ if(this.style){ this.style+="background-color:#dfe8f6; border-color:#b5b8c8;background-image:url('')"; }else{ this.style="background-color:#dfe8f6; border-color:#b5b8c8;background-image:url('')"; } } } if(this.display){//用于显示的样式,只有下边的border this.style="border-style: none none groove none;background-image:url('');"; this.readOnly=true; if(this.ext_style){ this.style+=this.ext_style; } } } });
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2、解决combobox模糊查找(ExtJS 默认的Combobox的输入过滤是从第一个字符开始的,我们一般需要它能够支持模糊匹配,现在就只好又累修改源码了)
//解决combobox模糊查找 Ext.override(Ext.form.ComboBox, { doQuery : function(q, forceAll){ q = Ext.isEmpty(q) ? '' : q; var qe = { query: q, forceAll: forceAll, combo: this, cancel:false }; if(this.fireEvent('beforequery', qe)===false || qe.cancel){ return false; } q = qe.query; forceAll = qe.forceAll; if(forceAll === true || (q.length >= this.minChars)){ if(this.lastQuery !== q){ this.lastQuery = q; if(this.mode == 'local'){ this.selectedIndex = -1; if(forceAll){ this.store.clearFilter(); }else{ this.store.filter(this.displayField, q ,true); } this.onLoad(); }else{ this.store.baseParams[this.queryParam] = q; this.store.load({ params: this.getParams(q) }); this.expand(); } }else{ this.selectedIndex = -1; this.onLoad(); } } } });
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3、适用于ComboBox? 添加一个 sideText 标签显示在右侧如必填项的 * 号
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/**适用于ComboBox 添加一个 sideText 标签显示在右侧如必填项的 * 号等*/ Ext.override(Ext.form.ComboBox, { sideText : '', onRender : function(ct, position) { Ext.form.ComboBox.superclass.onRender.call(this, ct, position); if (this.sideText != '') { //this.sideEl = ct.first('div').createChild({ this.sideEl = ct.createChild({ tag: 'div', style:'position:absolute;left:'+(this.x+this.width)+';top:'+(this.y)+';z-index:900;padding-left:2px;display:inline-block;display:inline;', html: this.sideText }); } if (this.hiddenName) { this.hiddenField = this.el.insertSibling({ tag : 'input', type : 'hidden', name : this.hiddenName, id : (this.hiddenId || this.hiddenName) }, 'before', true); // prevent input submission this.el.dom.removeAttribute('name'); } if (Ext.isGecko) { this.el.dom.setAttribute('autocomplete', 'off'); } if (!this.lazyInit) { this.initList(); } else { this.on('focus', this.initList, this, { single : true }); } } });
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4、解决Grid中文排序混乱--客户端排序
//解决中文排序--客户端排序 Ext.data.Store.prototype.applySort = function() { if (this.sortInfo && !this.remoteSort) { var s = this.sortInfo, f = s.field; var st = this.fields.get(f).sortType; var fn = function(r1, r2) { var v1 = st(r1.data[f]), v2 = st(r2.data[f]); if (typeof(v1) == "string") { return v1.localeCompare(v2); } return v1 > v2 ? 1 : (v1 < v2 ? -1 : 0); }; this.data.sort(s.direction, fn); if(this.snapshot && this.snapshot != this.data) { this.snapshot.sort(s.direction, fn); } for(var i=0;i<tempArray.length;i++){ this.data.add(tempArray[i]); } if(this.snapshot&&tempArray.length>0){ for(var i=0;i<tempArray.length;i++){ this.data.add(tempArray[i]); this.snapshot.add(tempArray[i]); } } } };
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5、处理加合计行后分页工具栏的计数错误
Ext.PagingToolbar.prototype.updateInfo=function(){ if(this.displayItem){ var count = this.store.getCount(); if(this.store.sumcol){ if(this.cursor+count==this.store.getTotalCount()+2){ count-=2; }else{ count-=1; } } var msg = count == 0 ? this.emptyMsg : String.format( this.displayMsg, this.cursor+1, this.cursor+count, this.store.getTotalCount() ); this.displayItem.setText(msg); } };
?6、设置ajax请求时间默认600秒
Ext.data.Connection.prototype.timeout='600000';
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7、重写onFocus方法,当TextFieldreadOnly为 true时,实现TextField不获取焦点
Ext.override(Ext.form.TextField, { onFocus : function(){ Ext.form.TextField.superclass.onFocus.call(this); if(this.readOnly){ this.blur(); } } });
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8、解决Ajax请求session超时
Ext.Ajax.on('requestcomplete',checkUserSessionStatus, this); function checkUserSessionStatus(conn,response,options){ var h=response.getAllResponseHeaders(); if(h.indexOf("reload")!=-1){//窗口标题我写在ExtJS的国际化配置文件中,这里是引用的 Ext.MessageBox.alert(Ext.MessageBox.buttonMsg.t,Ext.MessageBox.buttonMsg.s,function(){ var plocation=parent.window.location; parent.window.location.href=location.protocol+"//"+location.host+plocation.pathname.match(/\/[a-z_0-9A-Z]{1,}\//g)[0]; }); } }
?其中在Action中有,最好是写在一个覆盖所有请求的拦截器里面:
if(session.get("user")==null){ try { response.setHeader("reload", "timeout"); } catch (Exception e) { e.printStackTrace(); } }
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?9、重写Ext的grid行选中样式Selection Styles,使当前行看起来更清晰
.x-grid3-row-selected .x-grid3-cell-inner { /*border:1px dotted;*/ font-weight: bold; color:'<%=lineColor%>' }
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?待续......
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