Below is my code:
<body>
<table border="1">
<tbody data-bind="foreach: $root.list1">
<tr data-bind="event:{dragstart: $root.dragStart, dragend: $root.dragEnd}" draggable="true">
<td data-bind="text: Id"> </td>
<td data-bind="text: Name"> </td>
</tr>
</tbody>
</table>
<table border="1" data-bind="event:{drop: $root.dragDrop, dragover: $root.dragOver}">
<tbody data-bind="foreach: $root.list2">
<tr>
<td data-bind="text: Id"> </td>
<td data-bind="text: Name"> </td>
</tr>
</tbody>
</table>
</div>
</body>
var MyViewModel = function () {
var self = this;
self.init = function () {
// Seed some data to list1 and list2.
}
self.list1 = ko.observableArray([]);
self.list2 = ko.observableArray([]);
self.draggingValue = null;
self.dragStart = function(customer){
console.log('dragstart');
};
self.dragEnd = function(){
console.log('dragend');
};
self.dragDrop = function(){
console.log('dragdrop');
};
self.dragOver = function(){
console.log('dragover');
};
}
var Customer = function (Id, Name) {
var self = this;
self.Id = ko.observable(Id);
self.Name = ko.observable(Name);
}
$(document).ready(function () {
var model = new MyViewModel();
model.init();
ko.applyBindings(model);
});
When I run this page, the console only shows dragstart. If I change my html this way:
<tr data-bind="event:{dragend: $root.dragEnd}" draggable="true" ondragstart='console.log("dragstart")'>
then my code works fine. I think this problem is caused by KO.
Your event handlers need to return true or they will prevent the default action.
self.dragStart = function (customer) {
console.log('dragstart');
return true;
};
http://jsfiddle.net/j35kfgdx/
Related
I need to put observableArray with dynamic size inside observableArray and bind data to View.
View is render values from newData, but not update it in newData, when i edit it in View.
ko.applyBindings(new (function () {
var self = this;
self.lengthNewData = ko.observable(2);
self.newData = ko.observableArray();
self.AddDataStrings = function () {
let newString = ko.observableArray();
for(let i0 = 0; i0 < self.lengthNewData(); i0++)
newString.push(i0);
self.newData.push(newString);
}
self.SendData = function () {
alert(ko.toJSON(self.newData));
}
})());
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script>
<span data-bind="visible: !newData().length">Number of rows: <input data-bind="value: lengthNewData"/></span>
<input type="button" value="Add" data-bind="click: $root.AddDataStrings"/>
<input type="button" value="Send" data-bind="visible: newData().length, click: $root.SendData"/><br>
<table>
<tbody data-bind="foreach: newData">
<tr data-bind="foreach: $data">
<td><input data-bind="value: $data"/></td>
</tr>
</tbody>
</table>
https://jsfiddle.net/tvxyyzkp/6/
Push Add, edit it and push Send. Data was not modified!
Why and What need to change?
There are two immediate mistakes in your code.
You do not push observables into your newString. You should do:
newString.push(ko.observable(i0));
You bind your inputs to $data. $data contains the unwrapped data value, i.e. it's not observable. Bind to $rawData in such a setup.
This works:
ko.applyBindings(new(function() {
var self = this;
self.lengthNewData = ko.observable(2);
self.newData = ko.observableArray();
self.AddDataStrings = function() {
let newString = ko.observableArray();
for (let i0 = 0; i0 < self.lengthNewData(); i0++)
newString.push(ko.observable(i0));
self.newData.push(newString);
}
self.SendData = function() {
alert(ko.toJSON(self.newData));
}
})());
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script>
<span data-bind="visible: !newData().length">Number of rows: <input data-bind="value: lengthNewData"/></span>
<input type="button" value="Add" data-bind="click: AddDataStrings" />
<input type="button" value="Send" data-bind="visible: newData().length, click: SendData" /><br>
<table>
<tbody data-bind="foreach: newData">
<tr data-bind="foreach: $data">
<td><input data-bind="value: $rawData" /></td>
</tr>
</tbody>
</table>
<pre data-bind="text: ko.toJSON($root, null, 2)"></pre>
I just starting out with Knockout and running through a pluralsite course.
I have a (presumably basic) question about a computed property based on the parent array:
Given the below code how do I make it work so that the Amount property for each item in my.vm.attendees is always the totalCost divided by number of attendees. E.g. with 4 attendees in the collection amount for each should be 25.
This should be automatically updated as you add and remove items.
<script type="text/javascript">
$(function () {
var total = 100;
//Attendee construction
my.Attendee = function () {
this.Name = ko.observable();
this.Amount = ko.computed(function () {
return total / this.numberOfAttendees;
}, my.vm);
};
my.vm = {
//observable array of attendees
attendees: ko.observableArray([new my.Attendee()]),
addAttendee: function () {
my.vm.attendees.push(new my.Attendee());
},
numberOfAttendees: function () {
my.vm.attendees.lenght + 1; //zero based
}
}
ko.applyBindings(my.vm);
});
</script>
I would probably do something like this.
function attendee(name, amount) {
var self = this;
this.name = ko.observable(name);
this.amount = ko.observable(amount);
}
function model() {
var self = this;
this.attendees = ko.observableArray();
this.total = ko.computed(function() {
var total = 0;
ko.utils.arrayForEach(this.attendees(), function(item) {
var value = parseFloat(item.amount());
if (!isNaN(value)) {
total += value;
}
});
return total.toFixed(2);
}, this);
this.average = ko.pureComputed(function() {
return self.total() / self.attendees().length;
}, this);
this.remove = function(row) {
self.attendees.remove(row);
}
this.name = ko.observable('');
this.amount = ko.observable('');
this.add = function() {
self.attendees.push(new attendee(self.name(), self.amount()));
self.amount('');
self.name('');
}
}
var mymodel = new model();
$(document).ready(function() {
ko.applyBindings(mymodel);
mymodel.attendees.push(new attendee('Bob', 25));
});
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table class="table table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Amount</th>
<td>Delete</td>
</tr>
</thead>
<tbody data-bind="foreach: attendees">
<tr>
<td data-bind="text:name"></td>
<td data-bind="text:amount"></td>
<td>
<button class="btn btn-danger" data-bind="click: $parent.remove">
X
</button>
</td>
</tr>
</tbody>
<tfooter>
<tr>
<td colspan=2>Average:
<span data-bind="text:average">
</span>
</td>
</tr>
</tfooter>
</table>
<form class="form form-inline">
<label class="sr-only" for="inlineFormInput">Name</label>
<input type="text" class="form-control" id="inlineFormInput" placeholder="enter name" data-bind="textInput: name">
<label class="sr-only" for="inlineFormInputGroup">Amount</label>
<div class="input-group ">
<div class="input-group-addon">$</div>
<input type="text" class="form-control" id="inlineFormInputGroup" placeholder="amount" data-bind="textInput: amount">
</div>
<button type="buttont" class="btn btn-primary" data-bind="click: add">add row </button>
</form>
The "Amount" computed will be recalculated whenever any child observables are updated. Therefore you'll need to make "total" an observable if you want it to trigger a change, and you'll need to make "numberOfAttendees" a computed itself so that it can update when my.vm.attendees gets updated, and that can then cascade to an update of the "Amount" computed.
I am having an issue with my knockout not being recognized in html:
<div class="row-fluid">
<div class="span6">
<div class="control-group">
<fieldset>
<legend>Rates</legend>
<div id="creditcards-rates" class="row-fluid">
<p data-bind="visible: rates() == undefined || rates().length == 0">
No rates added yet.
</p>
<table data-bind="visible: rates() !== undefined && rates().length > 0" class="table table-striped table-condensed">
<thead>
<tr>
<th>Payment Status</th>
<th>Income Amount</th>
<th>Confirmed by Provider</th>
<th>Payment Status</th>
<th>Notes</th>
<th></th>
</tr>
</thead>
<tbody data-bind="foreach: rates">
<tr>
<td>
<input type="hidden" data-bind="value: Id, attr: { id: 'Rates[' + $index() + '].Id', name: 'Rates[' + $index() + '].Id' }" />
</td>
<td>
<a id="btn-remove" data-bind="click: $root.removeRate"><i class="icon icon-minus"></i></a>
</td>
</tr>
</tbody>
</table>
<button class="btn" data-bind="click: addNewRate"><i class="icon icon-plus"></i> Add New Payment</button>
</div>
</fieldset>
</div>
</div>
</div>
Problem is where data-bind doesn't recognize the values. I get error in console:
Error: Syntax error, unrecognized expression: input[data-bind='value:
Id, attr: { id: 'Rates[' + $index() + '].Id', name: 'Rates[' +
$index() + '].Id' }']
...);return a},bc.error=function(a){throw new Error("Syntax error,
unrecognized exp...
My knockout is:
var Micki = Micki || {};
Micki.Electro = {
Edit: function (options) {
var settings = $.extend({
id: 0
}, options);
var _alerts;
var _rates;
var vm;
function init(alerts, rates) {
_alerts = alerts;
_rates = rates;
vm = new ViewModel();
ko.applyBindings(vm);
function ViewModel(options) {
var self = this;
self.mediator = null;
self.publishKey = options.publishKey;
self.rates = ko.observableArray([]);
self.init = function (mediator, alerts, rates) {
self.mediator = mediator;
self.alerts = alerts;
//Rates.
$.each(rates, function (index, rate) {
var _rate = {
Id: ko.observable(rate.Id),
PaymentType: ko.observable(rate.PaymentType),
IncomeAmount: ko.observable(rate.IncomeAmount),
ConfirmedDate: ko.observable(rate.ConfirmedDate),
PaymentStatus: ko.observable(rate.PaymentStatus),
Note: ko.observable(rate.Note)
};
self.rates.push(_rate);
});
self.container.on("change keypress paste focus textInput input", function () {
self.mediator.publish(self.publishKey);
});
};
self.initFields = function () {
self.fields = [];
_.each($("[name^='Rates']"), function (field) {
self.fields.push(new Crate.Core.Field($(field), self.mediator, self.publishKey));
});
//_ratesAndTiers.initFields();
//_campaignSpecific.initFields();
};
self.addNewRate = function (data, event) {
alert("test");
};
return self;
}
}
}
}
Iam trying to add certain data to an array, like so:
Here is my code:-
Create.html
Field Name:
Display Name:
Add fields
</fieldset>
<table class="table" style="margin:20px 0px">
<thead>
<tr>
<th>Field Name</th>
<th>Field Display Name</th>
</tr>
</thead>
<tbody data-bind="foreach: fields">
<tr>
<td data-bind="text: fieldName"></td>
<td data-bind="text: fieldDisplayName"></td>
<td>
<div style="height:20px; width:20px; border:1px solid #000000; padding: 5px" data-bind="style: { backgroundColor : color }"></div>
</td>
<td><button class="btn btn-danger btn-circle" data-bind="click: remove"><i class="glyphicon glyphicon-remove"></i></button></td>
</tr>
</tbody>
</table>
Table.js
var ViewModel = function () {
var self = this;
self.fields = ko.observableArray();
self.fieldName = ko.observable();
self.fieldDisplayName = ko.observable();
self.isRangeError = ko.observable(false);
var Field = function (fieldName, fieldDisplayName) {
this.fieldName = fieldName;
this.fieldDisplayName = fieldDisplayName;
this.remove = function () {
self.fields.remove(this);
}
}
self.addFields = function () {
var tr = self.fields();
for (var i = 0; i < tr.length; i++) {
if (self.fieldName == tr[i].fieldName && self.fieldDisplayName == tr[i].fieldDisplayName) {
self.isFieldError(true);
return;
}
}
self.isFieldError(false);
self.fields.push(new Field(self.fieldName(), self.fieldDisplayName()));
}
I get a Error like this:-
Uncaught TypeError: undefined is not a functionTableChart.js:41 self.addFieldsknockout-3.2.0.debug.js:3713 (anonymous function)jquery-1.10.2.js:5109 jQuery.event.dispatchjquery-1.10.2.js:4780 elemData.handle
How do I solve this? I am quite new to knockout and javascript. Any help is appreciated.
There is a problem with your declared observables.
self.isRangeError = ko.observable(false);
Should be:
self.isFieldError = ko.observable(false);
Also color is not defined on your model but is used in the table.
I have an editable grid in which I populate with data after a user logs in with ajax.
I'm populating it with a device list and shipping information. Inside the device list json I have a Boolean "byod", if the selected row has the device with this data set to "0" I'd like to swap the "MAC Address" text field with the "Ship To" drop down.
fiddle is here http://jsfiddle.net/QTUqD/15/, code is below:
<form id="extMngForm">
<table class="table table-striped table-bordered">
<thead>
<tr>
<th>Extension</th>
<th>Name</th>
<th>Email</th>
<th>Pin</th>
<th>Device</th>
<th>MAC Address</th>
<th>Ship To</th>
<th style="width: 100px; text-align:right;"></th>
</tr>
</thead>
<tbody data-bind=" template:{name:templateToUse, foreach: pagedList }"></tbody>
</table>
<p class="pull-right addExt"><a class="btn btn-primary" data-bind="click: $root.add" href="#" title="edit"><i class="icon-plus"></i> Add Extension</a></p>
<div class="pagination pull-left" data-bind='visible: pagedList().length > 0'>
<ul><li data-bind="css: { disabled: pageIndex() === 0 }">Previous</li></ul>
<ul data-bind="foreach: allPages">
<li data-bind="css: { active: $data.pageNumber === ($root.pageIndex() + 1) }"></li>
</ul>
<ul><li data-bind="css: { disabled: pageIndex() === maxPageIndex() }">Next</li></ul>
</div>
<br clear="all" />
<script id="extItems" type="text/html">
<tr>
<td style="width:20px;" data-bind="text: extension"></td>
<td data-bind="text: name"></td>
<td data-bind="text: email"></td>
<td style="width:20px;" data-bind="text: vmpin"></td>
<td data-bind="text: device.asObject && device.asObject() && device.asObject().name"></td>
<td data-bind="text: macAddress"></td>
<td data-bind="text: shipTo"></td>
<td class="buttons">
<a class="btn" data-bind="click: $root.edit" href="#" title="edit"><i class="icon-edit"></i></a>
<a class="btn" data-bind="click: $root.remove" href="#" title="remove"><i class="icon-remove"></i></a>
</td>
</tr>
</script>
<script id="editExts" type="text/html">
<tr>
<td style="width:20px;"><input style="width:65px;min-width: 65px;" data-errorposition="b" class="required" name="extension" data-bind="value: extension" /></td>
<td><input data-errorposition="b" class="required" name="name" data-bind="value: name" /></td>
<td><input data-errorposition="b" class="required" name="email" data-bind="value: email" /></td>
<td style="width:20px;"><input style="width:65px;min-width: 65px;" data-errorposition="b" class="required" name="vmpin" data-bind="value: vmpin" /></td>
<td>
<select data-bind="options: $root.devicesForItem($data), optionsText: 'name', optionsValue: 'id', value: device, valueAsObject: 'asObject'"></select>
</td>
<td><input name="macAddress" data-bind="value: macAddress" /></td>
<td><select style="width:100px;" data-bind="options: $root.addressList, optionsText: 'locationName', optionsValue: 'locationName', value: shipTo"></select></td>
<td class="buttons">
<a class="btn btn-success" data-bind="click: $root.save" href="#" title="save"><i class="icon-ok"></i></a>
<a class="btn" data-bind="click: $root.remove" href="#" title="remove"><i class="icon-remove"></i></a>
</td>
</tr>
</script>
</form>
window.ExtListViewModel = new function () {
var self = this;
window.viewModel = self;
self.list = ko.observableArray();
self.pageSize = ko.observable(10);
self.pageIndex = ko.observable(0);
self.selectedItem = ko.observable();
self.extQty = ko.observable(20);
self.devices = ko.observableArray([{"id":"gxp2100","name":"Grandstream GXP-2100","qty":"2","byod":"1"}, {"id":"gxp2100","name":"Grandstream GXP-2100 (BYOD)","qty":"1","byod":"0"}, {"id":"pcom331","name":"Polycom 331","qty":"2","byod":"0"}, {"id":"pcom331","name":"Polycom 331 (BYOD)","qty":"1","byod":"1"}]);
self.addressList = ko.observableArray(['addressList']);
self.availableDevices = ko.computed(function() {
var usedQuantities = {};
self.list().forEach(function(item) {
var device = item.device();
if (device) {
usedQuantities[device.id] = 1 + (usedQuantities[device.id] || 0);
}
});
return self.devices().filter(function(device) {
var usedQuantity = usedQuantities[device.id] || 0;
return device.qty > usedQuantity;
});
});
self.devicesForItem = function(item) {
var availableDevices = self.availableDevices();
return self.devices().filter(function(device) {
return device === item.device() || availableDevices.indexOf(device) !== -1;
});
}
self.edit = function (item) {
self.selectedItem(item);
};
self.cancel = function () {
self.selectedItem(null);
};
self.add = function () {
var newItem = new Extension();
self.list.push(newItem);
self.selectedItem(newItem);
self.moveToPage(self.maxPageIndex());
};
self.remove = function (item) {
if (confirm('Are you sure you wish to delete this item?')) {
self.list.remove(item);
if (self.pageIndex() > self.maxPageIndex()) {
self.moveToPage(self.maxPageIndex());
}
}
};
self.save = function () {
self.selectedItem(null);
};
self.templateToUse = function (item) {
return self.selectedItem() === item ? 'editExts' : 'extItems';
};
self.pagedList = ko.dependentObservable(function () {
var size = self.pageSize();
var start = self.pageIndex() * size;
return self.list.slice(start, start + size);
});
self.maxPageIndex = ko.dependentObservable(function () {
return Math.ceil(self.list().length / self.pageSize()) - 1;
});
self.previousPage = function () {
if (self.pageIndex() > 0) {
self.pageIndex(self.pageIndex() - 1);
}
};
self.nextPage = function () {
if (self.pageIndex() < self.maxPageIndex()) {
self.pageIndex(self.pageIndex() + 1);
}
};
self.allPages = ko.dependentObservable(function () {
var pages = [];
for (i = 0; i <= self.maxPageIndex() ; i++) {
pages.push({ pageNumber: (i + 1) });
}
return pages;
});
self.moveToPage = function (index) {
self.pageIndex(index);
};
};
ko.applyBindings(ExtListViewModel, document.getElementById('extMngForm'));
function Extension(extension, name, email, vmpin, device, macAddress, shipTo){
this.extension = ko.observable(extension);
this.name = ko.observable(name);
this.email = ko.observable(email);
this.vmpin = ko.observable(vmpin);
this.device = ko.observable(device);
this.macAddress = ko.observable(macAddress);
this.shipTo = ko.observable(shipTo);
};
ExtListViewModel.addressList = [{"shipping_address_street":"555 Lane","shipping_address_state":"TX","shipping_address_city":"Dallas","shipping_address_postalcode":"75000","locationName":"Preset"}, {"shipping_address_street":"555 Lane","shipping_address_state":"TX","shipping_address_city":"Dallas","shipping_address_postalcode":"75000","locationName":"Home"}];
//Shows device name not value (knockout extension)
ko.bindingHandlers.valueAsObject = {
init: function(element, valueAccessor, allBindingsAccessor) {
var value = allBindingsAccessor().value,
prop = valueAccessor() || 'asObject';
//add an "asObject" sub-observable to the observable bound against "value"
if (ko.isObservable(value) && !value[prop]) {
value[prop] = ko.observable();
}
},
//whenever the value or options are updated, populated the "asObject" observable
update: function(element, valueAccessor, allBindingsAccessor) {
var prop = valueAccessor(),
all = allBindingsAccessor(),
options = ko.utils.unwrapObservable(all.options),
value = all.value,
key = ko.utils.unwrapObservable(value),
keyProp = all.optionsValue,
//loop through the options, find a match based on the current "value"
match = ko.utils.arrayFirst(options, function(option) {
return option[keyProp] === key;
});
//set the "asObject" observable to our match
value[prop](match);
}
};
First of all, like I showed you in your other recent post, don't use optionsValue binding for your selects if you want the value to be the object itself (and then you don't need that valueAsObject stuff). So:
<select data-bind="options: $root.devicesForItem($data), optionsText: 'name', value: device"></select>
Second, your IDs need to be unique (not like in your current example) because your code depends on that.
Then, the rest is easy, you just need a simple computed boolean in your Extension objects that says whether the MAC address or the shipping thing is shown, e.g.:
this.showMac = ko.computed(function() {
if (self.device())
return self.device().byod !== '0';
return true;
});
And use this computed in the bindings, e.g. <!-- ko if: showMac --> or <td data-bind="text: showMac() ? macAddress : shipTo>"
Fiddle: http://jsfiddle.net/antishok/QTUqD/16/