我正在尝试实现拖放以更改文章调度系统中的日期。 我希望用户能够将文章条目从一个日期拖到另一个日期,然后计划应该自动更新。 这是我的代码:
<script type="text/javascript">
$(function () {
$(".scheduledArticleRow").draggable({
cursor: "move",
cursorAt: { top: -12, left: -20 },
opacity: 0.5,
helper: function (event) {
return $("<div class='ui-widget-header'>" + $(this).data('title') + "</div>")
}
});
$(".articleNeededRow").droppable();
$(".reservedDateRow").droppable();
$(".scheduledArticleRow").off("dragstart").on("dragstart", function (e) {
console.log("dragstart");
e.dataTransfer.setData("articleId", $(this).data("articleId")); // Uncaught TypeError: Cannot call method 'setData' of undefined
e.dataTransfer.setData("oldDate", $(this).data("date")); // Uncaught TypeError: Cannot call method 'setData' of undefined
e.originalEvent.dataTransfer.setData("articleId", $(this).data("articleId")); // Uncaught TypeError: Cannot call method 'setData' of undefined
e.originalEvent.dataTransfer.setData("oldDate", $(this).data("date")); // Uncaught TypeError: Cannot call method 'setData' of undefined
});
$(".articleNeededRow").off("drop").on('drop', function (e) {
console.log("drop");
e.preventDefault();
e.stopPropagation();
changeScheduledDate(e);
});
$(".reservedDateRow").off("drop").on('drop', function (e) {
console.log("drop");
e.preventDefault();
e.stopPropagation();
changeScheduledDate(e);
});
});
function changeScheduledDate(e) {
debugger;
var articleId = e.dataTransfer.getData("articleId"); // Uncaught TypeError: Cannot call method 'setData' of undefined
var oldDate = e.dataTransfer.getData("oldDate"); // Uncaught TypeError: Cannot call method 'setData' of undefined
articleId = e.originalEvent.dataTransfer.getData("articleId", $(this).data("articleId")); // Uncaught TypeError: Cannot call method 'setData' of undefined
oldDate = e.originalEvent.dataTransfer.getData("oldDate", $(this).data("date")); // Uncaught TypeError: Cannot call method 'setData' of undefined
var newDate = $(this).parents(".tr").data("date");
// Do date-change stuff
}
</script>
<div class="table tidytable" width="90%">
<div class="thead">
<div class="cell">Date</div>
<div class="cell">Article title</div>
</div>
<div class="tbody" id="scheduleBody">
<div class="tr articleNeededRow" data-date="2014-02-11">
<div class="cell"><strong>Tue, 11th Feb</strong></div>
<div class="cell articleNeeded">Article needed.</div>
</div>
<div class="tr articleNeededRow" data-date="2014-02-12">
<div class="cell"><strong>Wed, 12th Feb</strong></div>
<div class="cell articleNeeded">Article needed.</div>
</div>
<div class="tr reservedDateRow" data-date="2014-02-13">
<div class="cell"><strong>Thu, 13th Feb</strong></div>
<div class="cell articleNeeded"><strong>Reserved for an upcoming article.</strong></div>
</div>
<div class="tr scheduledArticleRow" data-date="2014-02-14" data-articleid="8789" data-title="This is the title"
draggable="true">
<div class="cell"><strong>Fri, 14th Feb</strong></div>
<div class="cell">
<h3>This is the title</h3>
</div>
</div>
</div>
</div>
我正在使用.css表。 用户应该能够从"这是标题"行中的任何位置拖动到任何其他行。 但在 dragStart 事件处理程序中,e.dataTransfer 设置为 null,并且不可能将任何数据传递到 drop 事件。 我不想求助于cookie,HTML5本地存储或全局变量 - 这个东西应该可以工作。我使用数据传输将其拖放在应用程序的其他部分很好地工作。 有些帖子建议我需要使用 e.originalEvent.dataTransfer,但这也是空的。我正在使用谷歌浏览器BTW。 我创建了一个jsFiddle - http://jsfiddle.net/btA97/- 非常感谢任何帮助。
看来你的 .draggable() 做错了什么。您还需要在拖拽中执行e.preventDefault()
和e.stopPropagation()
,以确保发生丢弃。
此代码正确访问所有事件:
$(function () {
/*
$(".scheduledArticleRow").draggable({
cursor: "move",
cursorAt: {
top: -12,
left: -20
},
opacity: 0.5,
helper: function (event) {
return $("<div class='ui-widget-header'>" + $(this).data('title') + "</div>")
}
});
*/
$(".articleNeededRow").droppable(); // With this commented out the code still works
$(".reservedDateRow").droppable(); // This one too
$(".scheduledArticleRow").on("dragstart", function (e) {
console.log("dragstart");
console.dir(e);
e.originalEvent.dataTransfer.setData("articleId", $(this).data("articleId"))
e.originalEvent.dataTransfer.setData("oldDate", $(this).data("date"));
});
$(".articleNeededRow").on('dragover', function (e) {
console.log("dragover");
e.preventDefault();
e.stopPropagation();
});
$(".articleNeededRow").on('drop', function (e) {
console.log("drop");
e.preventDefault();
e.stopPropagation();
changeScheduledDate(e);
});
$(".reservedDateRow").on('dragover', function (e) {
console.log("dragover");
e.preventDefault();
e.stopPropagation();
});
$(".reservedDateRow").on('drop', function (e) {
console.log("drop");
e.preventDefault();
e.stopPropagation();
changeScheduledDate(e);
});
});
function changeScheduledDate(e) {
articleId = e.originalEvent.dataTransfer.getData("articleId");
oldDate = e.originalEvent.dataTransfer.getData("oldDate");
console.log("articleID: "+articleId);
console.log("oldDate: "+oldDate);
var newDate = $(this).parents(".tr").data("date");
console.log("newDate: "+newDate);
// Do date-change stuff
}
需要使用 event.originalEvent 对象。