KnockOutJS.com のカートの例を使用して、スライダー (またはスライダーの数) をどのようにリンクして、合計値がドロップダウン リストと選択された追加アイテム (この場合はサングラス) の数を考慮に入れるかスライダー コントロールで。
getExtrasTotal() 関数を呼び出して合計値を取得しました-ドロップダウンリストまたはアイテムの数が変更されたとき-スライダーが変更されたときではありません。
ここにフィドルがあります:http://jsfiddle.net/mtait/mBxky/1/
HTML:
<div class='liveExample'>
<table width='100%'>
<thead>
<tr>
<th width='25%'>Category</th>
<th width='25%'>Product</th>
<th class='price' width='15%'>Price</th>
<th class='quantity' width='10%'>Quantity</th>
<th class='price' width='15%'>Subtotal</th>
<th width='10%'> </th>
</tr>
</thead>
<tbody data-bind='foreach: lines'>
<tr>
<td>
<select data-bind='options: sampleProductCategories, optionsText: "name", optionsCaption: "Select...", value: category'> </select>
</td>
<td data-bind="with: category">
<select data-bind='options: products, optionsText: "name", optionsCaption: "Select...", value: $parent.product'> </select>
</td>
<td class='price' data-bind='with: product'>
<span data-bind='text: formatCurrency(price)'> </span>
</td>
<td class='quantity'>
<input data-bind='visible: product, value: quantity, valueUpdate: "afterkeydown"' />
</td>
<td class='price'>
<span data-bind='visible: product, text: formatCurrency(subtotal())' > </span>
</td>
<td>
<a href='#' data-bind='click: $parent.removeLine'>Remove</a>
</td>
</tr>
</tbody>
</table>
<br />
<label for="slider1">Sunglasses $20 each - how many would you like</label>
<input type="range" class="slide" name="slider1" id="slider1" min="0" max="10" value="0" data-price="20.00" data-id="1">
<br />
<label for="slider2">Doc holder $15 each - how many would you like</label>
<input type="range" class="slide" name="slider2" id="slider2" min="0" max="10" value="0" data-price="15.00" data-id="2">
<p class='grandTotal'>
Total value: <span data-bind='text: formatCurrency(grandTotal())'> </span>
</p>
<button data-bind='click: addLine'>Add product</button>
<button data-bind='click: save'>Submit order</button>
</div>
Javascript:
function formatCurrency(value) {
return "$" + value.toFixed(2);
}
var CartLine = function() {
var self = this;
self.category = ko.observable();
self.product = ko.observable();
self.quantity = ko.observable(1);
self.subtotal = ko.computed(function() {
return self.product() ? self.product().price * parseInt("0" + self.quantity(), 10) : 0;
});
// Whenever the category changes, reset the product selection
self.category.subscribe(function() {
self.product(undefined);
});
};
var Cart = function() {
// Stores an array of lines, and from these, can work out the grandTotal
var self = this;
self.lines = ko.observableArray([new CartLine()]); // Put one line in by default
self.grandTotal = ko.computed(function() {
var total = 0;
$.each(self.lines(), function() { total += this.subtotal() })
var
return total;
});
// Operations
self.addLine = function() { self.lines.push(new CartLine()) };
self.removeLine = function(line) { self.lines.remove(line) };
self.save = function() {
var dataToSave = $.map(self.lines(), function(line) {
return line.product() ? {
productName: line.product().name,
quantity: line.quantity()
} : undefined
});
alert("Could now send this to server: " + JSON.stringify(dataToSave));
};
};
function getExtrasTotal() {
var extrastotal = 0;
var count = 0;
var arr = [];
$('.slide')
.each(function (index, Element) {
var obj = {
id: $(Element).data("id"),
price: $(Element).data("price"),
number: $(Element)
.val()
};
extrastotal += obj.number * obj.price;
});
return extrastotal;
}
ko.applyBindings(new Cart());
ありがとうございました、
マーク