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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