我现在正在学习CanJS,所以想尝试一个非常基础的小demo。该演示是您将拥有不同类型的移动充值计划,显示在顶部(单选按钮),通过选择每个计划,相应的价格选项将显示在底部的表格中。
对于这个演示,我创建了两个 Model 、 2 Control 和 2 Template 文件,我的问题是两个控件如何相互通信?标准方法是什么?
现在我直接通过它的实例调用控制方法,但我不确定这是否是正确的做法。另外请解释一下Can.Route。
输出 http://jsfiddle.net/sabhab1/2mxfT/10/
数据
var CATEGORIES = [{id: 1 , name: "2G Internet Recharge"},
{id: 2 , name: "3G Internet Recharge"},
{id: 3 , name: "full talktime Recharge"},
{id: 4 , name: "Validity and talktime Recharge"},
{id: 5 , name: "National and international roaming"}];
var RECHARGEAMOUNTS =[{
id: 1 ,
values : [{amount: "Rs. 100" , benefit:"300 MB" ,validity:"30"},
{amount: "Rs. 200" , benefit:"1 GB" ,validity:"30"}]
},
{
id: 2 ,
values : [{amount: "Rs. 10" , benefit:"300 MB" ,validity:"30"},
{amount: "Rs. 99" , benefit:"100 GB" ,validity:"90"}]
},
{
id: 3 ,
values : [{amount: "Rs. 80" , benefit:"1 GB" ,validity:"50"},
{amount: "Rs. 99" , benefit:"100 GB" ,validity:"50"}]
},
{
id: 4 ,
values : [{amount: "Rs. 55" , benefit:"30 MB" ,validity:"10"},
{amount: "Rs. 200" , benefit:"1 GB" ,validity:"30"},
{amount: "Rs. 99" , benefit:"100 GB" ,validity:"90"}]
},
{
id: 5 ,
values : [{amount: "Rs. 880" , benefit:"100 MB" ,validity:"90"},
{amount: "Rs. 550" , benefit:"2 GB" ,validity:"30"},
{amount: "Rs. 1000" , benefit:"4 GB" ,validity:"90"},
{amount: "Rs. 1550" , benefit:"10 GB" ,validity:"90"}]
}
];
模型
//Model Category
CategoryModel = can.Model({
findAll : function(){
return $.Deferred().resolve(CATEGORIES);
}
},{});
//Model Category
ReachargeAmountModel = can.Model({
findAll : function(){
return $.Deferred().resolve(RECHARGEAMOUNTS);
},
findOne : function(params){
return $.Deferred().resolve(RECHARGEAMOUNTS[(+params.id)-1]);
}
},{});
控制
**// Can Control
var CategoryControl = can.Control({
// called when a new Todos() is created
init: function (element, options) {
// get all todos and render them with
// a template in the element's html
var el = this.element;
CategoryModel.findAll({}, function (values) {
el.html(can.view('categoriesEJS', values))
});
this.options.rchAmtCtrl = new RechargeAmountControl("#rechnageAmountView");
},
'input click' : function( el, ev ) {
var id = el.data('category').attr('id');
console.log(id);
this.options.rchAmtCtrl.update(id);
}
});
// Can Control
var RechargeAmountControl = can.Control({
// called when a new Todos() is created
init: function (element, options) {
// get all todos and render them with
// a template in the element's html
this.update(1);//this.update(id,this.element);
},
update : function(id){
var el = this.element;
ReachargeAmountModel.findOne({id: id}, function( rechargeAmount ){
// print out the todo name
//console.log(rechargeAmount.values[id].attr('benefit'));
el.html(can.view('RechnageAmountEJS', rechargeAmount.values));
});
}
});**
看法
<form id='categoriesView'></form>
</p>
<table id='rechnageAmountView'></table>
<script type='text/ejs' id='RechnageAmountEJS'>
<tr>
<th>Recharge Amount</th>
<th>Benefits</th>
<th>Validity(Days)</th>
</tr>
<% this.each(function( rechargeAmount ) { %>
<tr>
<td>
<%= rechargeAmount.attr( 'amount' ) %>
</td>
<td>
<%= rechargeAmount.attr( 'benefit' ) %>
</td>
<td>
<%= rechargeAmount.attr( 'validity' ) %>
</td>
</tr>
<% }) %>
</script>
<script type='text/ejs' id='categoriesEJS'>
<% this.each(function( category ) { %>
<input type="radio"
name="category"
<%= category.attr('id') == 1 ? 'checked' : '' %>
value=<%= category.attr( 'name' ) %>
<%= (el) -> el.data('category',category) %>>
<%= category.attr( 'name' ) %>
</input>
<% }) %>
</script>
主要通话
new CategoryControl("#categoriesView");