Question

我的代码意味着有一个表格，当点击td将变为红色。再次单击时，td将变回正常颜色。我有这个使用下面列出的代码。接下来，我希望得到它，以便如果用户将鼠标按住每个td，他将盘旋成红色。我不知道该如何解决这个问题？目前的代码是：

<style>
.Selected{
background-color :red;
}

</style>

<script>
     $(document).ready(function() {

 $('#WeekTable td').live('click', 'td', function() {
$(this).toggleClass('Selected');
                });

$('#Which').click(function() {
$('.Selected').each(function(index){
alert($(this).attr("ID"));
})
                });

                });

</script>
<table id="WeekTable" >
<tr id="WeekRow">
<td value = "1" id="Week1">1</td>
<td value = "2" id="Week2">2</td>
<td value = "3" id="Week3">3</td>
<td value = "4" id="Week4" >4</td>
<td value = "5" id="Week5">5</td>
<td value = "6" id="Week6">6</td>
<td value = "7" id="Week7">7</td>
<td value = "8" id="Week8">8</td>
<td value = "9" id="Week9">9</td>
<td value = "10" id="Week10">10</td>
<td value = "11" id="Week11">11</td>
<td value = "12" id="Week12">12</td>
<td value = "13" id="Week13">13</td>
<td value = "14" id="Week14">14</td>
<td value = "15" id="Week15">15</td>
</tr>
</table>
<button id="Which" >Which Weeks?</button>

谢谢你们！

Answer 1

我会设置一个变量来记住鼠标当前是否被按下。

mouseIsDown = false;

$(window).mousedown(function(){
    mouseIsDown = true;
});

$(window).mouseup(function(){
    mouseIsDown = false;
});

然后在td hover事件回调中使用该变量

$("#WeekTable td").hover(function(){
    if(mouseIsDown) $(this).addClass("Selected");
});

点击你不必使用直播活动，只需：

$("#WeekTable td").click(function(){
    $(this).toggleClass('Selected');
});

Answer 2

这是一种解决方法。您可以将mousedown事件与jQuery一起使用。默认情况下设置dragging的全局布尔值false，并在按住鼠标按钮时将其设为true，并在释放时返回false：

$(document).ready(function() {
    var dragging = false;

    $('html').mousedown(function(e){
        dragging = true;
    })
    $('html').mouseup(function(e){
        dragging = false;
    });

    $('#WeekTable tr td').mouseover(function(e){
        if (dragging) {
            $(this).css('background-color', 'red');
        }
    });
});

拖动Jquery鼠标按下事件？

2 个答案: