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knockout iCheck binding
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<div> | |
<label> | |
<input type="checkbox" data-bind="iCheckBox: SmokerCheckBox" /> | |
<span class="icheck-label"> Is Smoker</span> | |
</label> | |
</div> | |
<div data-bind="text: ko.toJSON(vm)"> | |
</div> |
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// Using ko 3.2.0 and iCheck 1.0.2 | |
// This function is requiured for below. | |
ko.subscribable.fn.subscribeChanged = function (callback) { | |
var that = this; | |
if (!that.previousValueSubscription) { | |
that.previousValueSubscription = this.subscribe(function (_oldValue) { | |
that.oldValue = _oldValue; | |
}, that, 'beforeChange'); | |
} | |
var subscription = that.subscribe(function (latestValue) { | |
callback(latestValue, that.oldValue); | |
}, that); | |
var protoDispose = subscription.dispose; | |
subscription.dispose = function () { | |
if (protoDispose) { | |
protoDispose.call(this); | |
} | |
if (that.previousValueSubscription) { | |
that.previousValueSubscription.dispose(); | |
} | |
delete that.oldValue; | |
} | |
return subscription; | |
}; | |
ko.bindingHandlers.iCheckBox = { | |
init: function (element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) { | |
var $el = $(element); | |
var observable = valueAccessor(); | |
$el.iCheck({ | |
checkboxClass: 'icheckbox_square-red', | |
inheritClass: true | |
}); | |
var enabledSubs = null; | |
var enable = allBindingsAccessor().enable; | |
if (enable != undefined) { | |
if (enable()) { | |
$el.iCheck('enable'); | |
} | |
else { | |
$el.iCheck('disable'); | |
} | |
enabledSubs = enable.subscribeChanged(function (newValue, oldValue) { | |
if (newValue != oldValue) { | |
$el.iCheck('update'); | |
} | |
}); | |
} | |
ko.utils.domNodeDisposal.addDisposeCallback(element, function () { | |
if (enabledSubs != null) { | |
enabledSubs.dispose(); | |
enabledSubs = null; | |
} | |
$el.iCheck('destroy'); | |
}); | |
// ifChecked handles tabs and clicks | |
$el.on('ifChecked', function (e) { | |
observable(true); | |
}); | |
$el.on('ifUnchecked', function (e) { | |
observable(false); | |
}); | |
ko.bindingHandlers.iCheckBox.update(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext); | |
}, | |
update: function (element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) { | |
// This update handles both the reverting of values from cancelling edits, and the initial value setting. | |
var $el = $(element); | |
var value = ko.unwrap(valueAccessor()); | |
if (value == true) { | |
$el.iCheck('check'); | |
} else if (value == false || value == null || value == "") { // Handle clearing the value on reverts. | |
$el.iCheck('uncheck'); | |
} | |
} | |
}; |
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