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我有一个jQuery UI对话框与表单上的knockoutjs提交绑定。对话框可以通过按下取消按钮,按对话框标题栏上的关闭按钮,按下转义键或按保存按钮来关闭。我的意图是取消,转义和标题栏关闭事件应该关闭对话框而不应用任何动作,而按下回车或点击'保存'应该执行对话动作。一切都按预期工作,除了输入键,这会导致取消事件,而不是提交事件。knockoutjs提交绑定不处理输入密钥正确
我已经创建了一个jsfiddle来说明这一点,并且包含以下用于引用的代码。
我道歉了冗长的代码...
基因
<!-- ko with: dialog -->
<div id="taskdlg" class="resizeableDialog"
data-bind="dialog: {autoOpen: false, title: 'Edit task', height: 200, width: 500, modal: true, close: updateCloseState}, openWhen: open">
<form data-bind="submit: update">
<table>
<tr>
<td style="width: 100px;"><label for="tasktitle">Title</label></td>
<td width="*">
<input id="tasktitle" type="text" placeholder="Task name" data-bind="value: titletext, valueUpdate: 'afterkeydown'" />
</td>
</tr>
<tr>
<td><button style="float: left;" data-bind="click: cancel">Cancel</button></td>
<td><button style="float: right;" type="submit">Save</button></td>
</tr>
</table>
</form>
</div>
<!-- /ko -->
<button data-bind="click: editTask">Edit</button>
<span data-bind="text: task"></span>
的JavaScript如下:
ko.bindingHandlers.dialog = {
init: function(element, valueAccessor, allBindingsAccessor) {
var options = ko.utils.unwrapObservable(valueAccessor());
setTimeout(function() { $(element).dialog(options || {}); }, 0);
//handle disposal (not strictly necessary in this scenario)
ko.utils.domNodeDisposal.addDisposeCallback(element, function() {
$(element).dialog("destroy");
});
},
update: function(element, valueAccessor, allBindingsAccessor) {
var shouldBeOpen = ko.utils.unwrapObservable(allBindingsAccessor().openWhen);
$(element)
.dialog(shouldBeOpen ? "open" : "close");
}
};
function Task(name) {
var self = this;
this.title = ko.observable(name);
this.toString = function() { return "Task: " + self.title(); };
}
function TaskDialog(viewModel) {
var self = this;
this.viewModel = viewModel;
this.task = ko.observable();
this.open = ko.observable(false);
this.titletext = ko.observable();
this.editTask = function(task) {
self.task(task);
self.titletext(task.title());
self.open(true);
}
this.update = function() {
var task = self.task();
task.title(self.titletext());
self.open(false);
}
this.updateCloseState = function() {
if (self.open())
self.open(false);
}
this.cancel = function() {
self.open(false);
}
}
function viewModel() {
var self = this;
this.dialog = ko.observable(new TaskDialog(self));
this.task = ko.observable(new Task('sample task'));
this.editTask = function() {
self.dialog().editTask(self.task());
}
};
ko.applyBindings(new viewModel());
谢谢!这是惊人的,愚蠢的小东西浪费了多少时间...... – 2011-12-28 18:13:21
是的,我花了很长时间在看这个。只是似乎有些东西我们错过了,它并不需要大量的代码来捕获keyCode 13,等等...... – 2011-12-28 18:15:25