[TimLinux] JavaScript 模态框可拖动功能实现—

<!DOCTYPE html>

<html>

<head>

    <meta charset="utf-8">

    <title>jQuery - Drag</title>

    <style>

        .modal {

            position: fixed;

            left: 0;

            top: 0;

            width: 100%;

            height: 100%;

            background-color: rgba(100, 100, 100, 0.5);

            z-index: 2001;

        }

        .modal-content {

            position: absolute;

            width: 500px;

            height: 300px;

            left: 50%;

            margin-left: -250px;

            margin-top: 100px;

            border: 10px solid rgba(150, 150, 150, 0.5);

            background-color: white;

            text-align: center;

        }

        .modal-title {

            height: 38px;

            border-bottom: 1px solid blue;

            text-align: left;

            padding: 0 10px;

            font-weight: bold;

            cursor: move;

        }

        .modal-title div {

            display: inline-block;

            font-size: larger;

            line-height: 2;

            padding: 0 8px;

        }

        .modal-title .modal-close {

            float: right;

            cursor: pointer;

        }

        .modal-title .modal-close:hover {

            background-color: rgb(198, 236, 236);

        }

    </style>

</head>

<body>

    <div>

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    </div>

    <div id="idModal" class="modal">

        <div id="idModalDetail" class="modal-content">

            <div id="idModalTitle" class="modal-title">

                <div>可拖动</div>

                <div class="modal-close">X</div>

            </div>

            <div class="modal-body">This is drag modal</div>

        </div>

    </div>

    <script type="text/javascript" src="./jquery-2.2.4.js"></script>

    <script>

        // 拖动时，偶发选中文本，将该选择功能禁用

        function cancelUserSelect(ele) {

            if (!ele) return false;

            document.body.style.userSelect = 'none';

            document.body.style.webkitUserSelect = 'none';

            document.body.style.msUserSelect = 'none';

            document.body.style.mozUserSelect = 'none';

            ele.style.userSelect = 'none';

            ele.style.webkitUserSelect = 'none';

            ele.style.msUserSelect = 'none';

            ele.style.mozUserSelect = 'none';

        }

        // 恢复禁用的文本选择功能

        function restoreUserSelect(ele) {

            if (!ele) return false;

            document.body.style.userSelect = 'text';

            document.body.style.webkitUserSelect = 'text';

            document.body.style.msUserSelect = 'text';

            document.body.style.mozUserSelect = 'text';

            ele.style.userSelect = 'text';

            ele.style.webkitUserSelect = 'text';

            ele.style.msUserSelect = 'text';

            ele.style.mozUserSelect = 'text';

        }

        function drag() {

            var $idModalTitle = $('#idModalTitle');

            var $idDragModal = $idModalTitle.parent();

            var mouseStartPoint = {left: 0, top: 0};

            var mouseEndPoint = {left: 0, top: 0};

            var oldPoint = {left: 0, top: 0};

            var isDraging = false;

            $(document).on('mousedown', '.modal-title', function(e) {

                // 关闭按钮不进行移动

                if ($(e.target).hasClass('modal-close')) return false;

                isDraging = true;

                mouseStartPoint = {left: e.clientX, top: e.clientY};

                oldPoint = $idDragModal.offset();  // 鼠标离模态框边距值

                cancelUserSelect($idDragModal.get(0));

            });

            $(document).on('mousemove', function(e) {

                if (!isDraging) return false;

                if ($idDragModal.css('margin-left') !== 0) {

                    $idDragModal.css('margin-left', 0);

                }

                if ($idDragModal.css('margin-top') !== 0) {

                    $idDragModal.css('margin-top', 0);

                }

                var mouseX = e.clientX;

                var mouseY = e.clientY;

                if (mouseX < 0) mouseX = 0;

                if (mouseY < 0) mouseY = 25;

                mouseEndPoint = {left: mouseX, top: mouseY};

                var newPoint = {

                    left: mouseEndPoint.left - (mouseStartPoint.left - oldPoint.left),

                    top: mouseEndPoint.top - (mouseStartPoint.top - oldPoint.top)

                };

                $idDragModal.offset(newPoint);

            });

            $(document).on('mouseup', function(e) {

                if (!isDraging) return false;

                isDraging = false;

                restoreUserSelect($idDragModal.get(0));

            });

        }

        drag();

    </script>

</body>

</html>
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[TimLinux] JavaScript 模态框可拖动功能实现——jQuery版

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