jQuery 实现鼠标画框并对框内数据选中的实例代码

jquery库:

jquery -1.10.2.min.js,jQuery UI - v1.12.1。

jQuery 代码

不多说了,之间上代码。不懂的地方看注释。

<script type="text/javascript">

//鼠标按下时的X Y坐标

var mouseDownX;

var mouseDownY;

//鼠标按下时移动的X Y 坐标

var mouseMoveX;

var mouseMoveY;

//移动的状态

var isMove = false;

/*初始化 选择框 */

function init() {

$("#selected").css("display", "none");

$("#selected").css("top", "0");

$("#selected").css("left", "0");

$("#selected").css("width", "0");

$("#selected").css("height", "0");

}

$(document).ready(function() {

init();

var selectedTD = new Array();//创建被选中表格数组

var TD = $("td");//获取所有表格信息

for ( var i = 0; i < TD.length; i++) {

selectedTD.push(TD[i]);

}

$("#tableDiv").mousedown(function(event) {

mouseDownX = event.clientX - $(this).offset().left;;

mouseDownY = event.clientY - $(this).offset().top;

console.log("mouseDownX=" + mouseDownX +" mouseDownY=" + mouseDownY );

if(event.target.id.match(/selected/)) {

isMove = true;

}

//鼠标按下并移动时进行判断(拖拽 or 画框)

$("#tableDiv").mousemove(function(event) {

mouseMoveX = event.clientX - $(this).offset().left;

mouseMoveY = event.clientY - $(this).offset().top;

var selectDiv = document.getElementById("selected");

if (isMove) {

//拖拽的代码,因为实在不想算 xy 了,所以使用了jquery ui

$("#selected").draggable();

//这部分是负责画框的时候,实时把框住的表格变色的,(代码和下面的代码重复了)

var left = selectDiv.offsetLeft, top = selectDiv.offsetTop; width = selectDiv.offsetWidth, height = selectDiv.offsetHeight;

for ( var i = 0; i < selectedTD.length; i++) {

var sl = selectedTD[i].offsetWidth + selectedTD[i].offsetLeft;

var st = selectedTD[i].offsetHeight + selectedTD[i].offsetTop;

if (sl > left && st > top && selectedTD[i].offsetLeft < left + width && selectedTD[i].offsetTop < top + height) {

if (selectedTD[i].className.indexOf("selected") == -1) {

selectedTD[i].className = "selected";

}

} else {

if (selectedTD[i].className.indexOf("selected") != -1) {

selectedTD[i].className = "TD";

}

}

}

} else {

//重复的代码,完了再把它抽取出来

var left = selectDiv.offsetLeft, top = selectDiv.offsetTop; width = selectDiv.offsetWidth, height = selectDiv.offsetHeight;

for ( var i = 0; i < selectedTD.length; i++) {

var sl = selectedTD[i].offsetWidth + selectedTD[i].offsetLeft;

var st = selectedTD[i].offsetHeight + selectedTD[i].offsetTop;

if (sl > left && st > top && selectedTD[i].offsetLeft < left + width && selectedTD[i].offsetTop < top + height) {

if (selectedTD[i].className.indexOf("selected") == -1) {

selectedTD[i].className = "selected";

}

} else {

if (selectedTD[i].className.indexOf("selected") != -1) {

selectedTD[i].className = "TD";

}

}

}

//鼠标抬起结束画框,和拖动

$("#tableDiv").mouseup(function() {

console.log("mouseUpX=" + mouseMoveX + " mouseUpY=" + mouseMoveX);

isMove = false;

$(this).unbind('mousemove');

})

//画框

displaySelected(mouseDownY, mouseDownX, mouseMoveX, mouseMoveY);

}

})

})

//当鼠标在已经画好的框上时,改变鼠标指针样式,就是十字形了

$("#selected").mouseenter(function() {

$("#selected").css("cursor", "move");

});

});

function displaySelected(mouseDownY, mouseDownX, mouseUpX, mouseUpY) {

$("#selected").css("display", "block");

$("#selected").css("top", mouseDownY);

$("#selected").css("left", mouseDownX);

var moveX = mouseMoveX - mouseDownX;

var moveY = mouseMoveY - mouseDownY;

if (moveY < 0) {

$("#selected").css("top", event.clientY - $("#table").offset().top);

}

if (moveX < 0) {

$("#selected").css("left", event.clientX - $("#table").offset().left);

}

$("#selected").css("width", Math.abs(moveX));

$("#selected").css("height", Math.abs(moveY));

}

</script>

测试用的html

使用table进行的测试:

<div id="tableDiv" style="width: 1500px; height: 1500px;top: 100px; left:100px; position: absolute;">

<div id="selected" style="border:5px dotted rgb(239, 37, 17);position: absolute;display: none;"></div>

<table border="1" style=" width: 1500px; height: 1500px;" id="table">

<tr>

<td id="1" class="TD"></td>

<td id="2" class="TD"></td>

<td id="3" class="TD"></td>

<td id="4" class="TD"></td>

<td id="5" class="TD"></td>

<td id="6" class="TD"></td>

</tr>

<tr>

<td id="7" class="TD"></td>

<td id="8" class="TD"></td>

<td id="9" class="TD"></td>

<td id="10" class="TD"></td>

<td id="11" class="TD"></td>

<td id="12" class="TD"></td>

</tr>

<tr>

<td id="1" class="TD"></td>

<td id="2" class="TD"></td>

<td id="3" class="TD"></td>

<td id="4" class="TD"></td>

<td id="5" class="TD"></td>

<td id="6" class="TD"></td>

</tr>

</table>

<!--表格代码太多所以...-->

</div>

效果图

以上所述是小编给大家介绍的jQuery 实现鼠标画框并对框内数据选中的实例代码,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对网站的支持!

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