The Seventh Day of Learning YUI.Ext-View&JSONView Part Two-A Case Study of an Art Studio Website_YUI.Ext related

Veiw and JSONView were briefly introduced in Part 1. Today, I will talk about application cases for you. Originally, Jack's Image Chooser was a very good case, which contained a lot of Jack's tricks. However, because of this, it is too profound. I can't understand it all. I can only choose. Its "big stems and deep stems", I encourage you to share it!
This article contains four major knowledge points: 1. Adding Tabs to LayoutDialog; 2. How to use View; 3. How to use JSONView; 4. Obtaining XML/JSON fields values ​​and paging

Demo address

【Definition of View】
A View is generally used to build a quick template-based display of datamodel, rather than building a more complex grid. I thnk there's a blog post that illustrates doing this with JSON data. Templates can be used for any repetitious html creation, not necessarily tied to a datamodel.
The main meaning is that View is used to display DataModel data, Part 1 has already said Pass. Here is a supplement from someone from fourm.

Code comments:

1. First read a simple paragraph

	
//用yui.ext做翻转按钮, super easy(美工最爱!?^^)
showBtn = getEl('showIntro');
showBtn.on('click', this.showDialog, this, true);
showBtn.applyStyles("cursor:pointer");
showBtn.on('mouseover', function(){showBtn.dom.src='images/over_10.gif'}, this, true);
showBtn.on('mouseout', function(){showBtn.dom.src='images/btn_10.gif'}, this, true);

//左边动画效果,createDelegate()负责轮换效果
var luo=getEl("left_pic");
luo.move('right', 250, true, .1, function(){
  luo.dom.src='images/'+who+".gif";
  luo.move('left', 250, true, .15, null, YAHOO.util.Easing.easeOutStrong);
}.createDelegate(this));

2. Add Tabs to LayoutDialog

LayoutDialong is divided into two areas: west & center. In the center, we need to add tabs and attach active events one by one

			
var center = layout.getRegion('center'); 
var tab1 = new YAHOO.ext.ContentPanel('luo', {title: '罗老师作品'}); 
center.add(tab1); 
center.add(new YAHOO.ext.ContentPanel('chen', {title: '陈老师作品'})); 
<br>
//center.on('panelactivated',function(){
// alert(center.titleTextEl);
//}, this, true);
//center.showPanel('center');    
/*two ways to activate the tabs.and tabs= many CPs
如果在BasicDialog中，只需要dialog本身就可以获取getTabs,因为Dialog本身就是
唯一的一个Region;
但在LayoutDialog中，Region是多个的，所有要指明哪个一个Region才行
*/
<br>
 // stoe a refeence to the tabs 获取TABS集合
var tabs = layout.getRegion('center').getTabs();//逐一加入事件
tabs.getTab('center').on('activate', function(){this.show_thumb('student')}, this, true);
tabs.getTab('luo').on('activate', function(){this.show_thumb('luo')}, this, true);
tabs.getTab('chen').on('activate',function(){this.show_thumb('chen')}, this, true);	
//center.showPanel('chen'); //用Region激活也可以
/*Tips:不能立即激活事件，会点延时，经过多行代码的延时便ok ！用addbufferlistener理论上也可以*/
layout.getRegion('center').getTabs().activate('center'); 

3. How to use View

//XML:index方式访问字段；JSON：直接使用字段名
var tpl = new YAHOO.ext.Template( 
	'<div class="thumb">'+
	'<div><img onclick=popupDialog("userfiles/image/'+who+'/{0}",{2},{3}) '+
	' src=userfiles/image/lite_'+who+'/{0}></div>' + 
	'<div>文件大小: {1}</div>'+
	'</div>'
); 
tpl.compile(); //“编译DOM”加速

var schema = {
	tagName: 'row',//Item项
	id: 'id',//ID如不需要时，设置空白字符串，不能取消！
	fields: ['filename','filesize','width','height']//读取的字段
};
var dm = new YAHOO.ext.grid.XMLDataModel(schema);
var mainView = new YAHOO.ext.View('pic_'+who, 
tpl,
dm, {
	singleSelect: true,//If JSON,还需指定一个config:jsonRoot
	emptyText : '<div style="padding:10px;">没有匹配的内容！</div>'
}); 
dm.on('load',function(){}, this, true); 
mainView.on('click', function(vw, index, node, e){
	//alert('Node "' + node[] + '" at index: ' + index + ' was clicked.')
},this, true);
mainView.prepareData = function(data){
	// prepare,用于自定义格式
	//如JSON方式直接属性名访问，e.g data.sizeString = formatSize(data.size);
	data[1] = formatSize(data[1]);
	return data;
};
//用DataModel加载文件，如果是JSONView，这个服务由JSONView本身（UpdateManager）提供
dm.load('xml.asp?who='+who);	

4. How to use JSONView

var dh = YAHOO.ext.DomHelper; 
dh.append(document.body, {tag: 'div', id: 'editUserDialog-user'}); 
//XML:index方式访问字段；JSON：直接使用字段名
var tpl = new YAHOO.ext.Template('<div>Username: {username}</div>' + 
'<div>Birthday: {birthday}</div>' + 
'<div>Member Since: {join_date}</div>' + 
'<div>Last Login: {last_login}</div>'); 
tpl.compile(); 
var mainView = new YAHOO.ext.JsonView('pic', 
tpl, {
  singleSelect: true,
  jsonRoot: 'user',
  emptyText : '<div style="PADDING-RIGHT: 10px; PADDING-LEFT: 10px; PADDING-BOTTOM: 10px; PADDING-TOP: 10px">No images match the specified filter</div>'
}); 
mainView.load("test.asp", "id=2"); 
//JSONView特有的异常事件
mainView.on('loadexception', function(){onLoadException()}, this, true);

var onLoadException= function(v,o){
	 alert('Error'); 
};

5. Get XML/JSON fields value and pagination

The reason why these two issues are discussed together is that I have not been able to achieve it so far. If you follow jack's method:

mainView.on('click', function(vw, index, node, e){
	alert('Node "' + node.id + '" at index: ' + index + ' was clicked.');
});

you can get the index but the node.id cannot be obtained. I had to implement it in an uglier way:

//在Domhelper中“硬”输出click事件
var tpl = new YAHOO.ext.Template( <br>	'<div class="thumb">'+<br>	'<div><img onclick=popupDialog("userfiles/image/'+who+'/{0}",{2},{3}) '+<BR>	' src=userfiles/image/lite_'+who+'/{0}></div>' + <br>	'<div>文件大小: {1}</div>'+<br>	'</div>'<br>); 

Paging:
View’s paging should pass DataModel. But I never succeeded. If anyone knows the reason, please tell me.
http://www.ajaxjs.com/yuicn/article.asp?id=20070239