jQuery弹出框代码封装DialogHelper

看了jQueryUI Dialog的例子，效果还不错，就是用起来有点儿别扭，写出的代码有点拧巴，需要再封装一下！于是就有了下面这个简单的DialogHelper辅助类，因为这篇文章分享的重点是思路，所以目前版本的代码也还非常粗糙。思路对了，后续再封装成什么样都不过是形式而已，希望这个思路能给大家点启迪，同时欢迎大家开拓思维，提出更好的改进意见。

//require ScrollHelper.js

function DialogHelper() {

    var _this = this;

    var doc = window.document;

    _this.maskDiv = null;

    _this.contentDiv = null;

    var options = {

        opacity: 0.4

    };

    this.popup = function (contentdiv, optionArg) {

        if (optionArg) {

            for (var prop in optionArg) {

                options[prop] = optionArg[prop];

            }

        }

        _this.contentDiv = contentdiv || _this.contentDiv;

        _this.maskDiv = $('<div>');

        _this.maskDiv.addClass('MaskDiv');

        _this.maskDiv.css({

            'filter': "Alpha(opacity=" + ( options.opacity - "0" ) * 100 + ");",

            'opacity': options.opacity,

            'display': 'block'

        });

        $(doc.body).append(_this.maskDiv);

        if (_this.contentDiv) {

            $(doc.body).append(_this.contentDiv);

            _this.contentDiv.show();

            _this.contentDiv.draggable({

                containment: "document",

                cursor: 'move',

                handle: ".Dialog_Head"

            });

            $(_this.maskDiv).on("mousemove", function() {

                $("body").preventScroll();

            });

            $(_this.maskDiv).on("mouseout", function() {

                $("body").liveScroll();

            });

            if ($(".cke").length == 0 && $(".Dialog_Body").length > 0) {

                $(".Dialog_Body").preventOuterScroll();

            }

        }

    };

    this.remove = function () {

        if (_this.contentDiv) {

            _this.contentDiv.remove();

        }

        if (_this.maskDiv) {

            _this.maskDiv.remove();

        }

        $("body").liveScroll();

    };

    this.formatPercentNumber = function (value, whole) {

        if (isNaN(value) && typeof value === "string") {

            if (value.indexOf("%") !== -1) {

                value = (value.replace("%", "") / 100) * whole;

            } else if (value.indexOf("px") !== -1) {

                value = value.replace("px", "");

            }

        }

        return Math.ceil(value);

    };

    this.position = function (dialog, dialogBody, minusHeight) {

        dialog = dialog || $(".ShowDialogDiv");

        if (dialog[0]) {

            var clientWidth = document.documentElement.clientWidth;

            var clientHeight = document.documentElement.clientHeight;

            var width = _this.formatPercentNumber(dialog.data("position").width, clientWidth) || dialog.width();

            var height = _this.formatPercentNumber(dialog.data("position").height, clientHeight) || dialog.height();

            width = width < 300 ? 300 : width;

            height = height < 450 ? 450 : height;

            $(dialog).css({

                "width": width + "px",

                "height": height + "px",

                "top": Math.ceil((clientHeight - height) / 2) + "px",

                "left": Math.ceil((clientWidth - width) / 2) + "px"

            });

            dialogBody = dialogBody || $(".Dialog_Body");

            if (dialogBody[0]) {

                minusHeight = minusHeight || ($(".Dialog_Head").outerHeight() + $(".Dialog_Foot").outerHeight());

                var dialogBodyHeight = height - minusHeight;

                dialogBody.height(dialogBodyHeight);

            }

        }

    }

}

var createDialogTemplate = function (optionArg, contentHtml, saveBtnClickHandler) {

    var options = {

        "Action": "",

        "Title": "",

        "Width": "50%",

        "Height": "50%"

    };

    if (optionArg) {

        for (var prop in optionArg) {

            options[prop] = optionArg[prop];

        }

    }

    var newDialog = $("<div class='ShowDialogDiv' id='Dialog_" + options.Title + "'>");

    var DialogHead = $("<div class='Dialog_Head'>").appendTo(newDialog);

    $("<span class='HeadLabel'>").html(options.Action + " " + options.Title).appendTo(DialogHead);

    var DialogClose = $("<span class='DialogClose'>").appendTo(DialogHead);

    var DialogBody = $("<div class='Dialog_Body'>").html(contentHtml).appendTo(newDialog);

    var DialogFoot = $("<div class='Dialog_Foot'>").appendTo(newDialog);

    var newDiv = $("<div class='Right'>").appendTo(DialogFoot);

    var ActionCancelDiv = $("<div class='ActionButtonContainer' title="Cancel">").appendTo(newDiv);

    DialogClose.on("click", function() {

        dialogHelper.remove();

    });

    ActionCancelDiv.on("click", function() {

        dialogHelper.remove();

    });

    var newA = $("<div class='ActionButton' id='ActionButtonCancel'>").appendTo(ActionCancelDiv);

    $("<div class='Icon Cancel'>").appendTo(newA);

    $("<div class='Title IconTitle'>").html("Cancel").appendTo(newA);

    var ActionSaveDiv = $("<div class='ActionButtonContainer' title="Save">").appendTo(newDiv);

    var newB = $("<div class='ActionButton ActionButtonAttention' id='ActionButtonSave'>").appendTo(ActionSaveDiv);

    newB.on('click', function () {

        if (typeof saveBtnClickHandler == "function") {

            saveBtnClickHandler();

        }

    });

    $("<div class='Icon Save'>").appendTo(newB);

    $("<div class='Title IconTitle SaveButton'>").html("Save").appendTo(newB);

    var minusHeight = DialogHead.outerHeight() + DialogFoot.outerHeight();

    newDialog.data("position", {

        width: options.Width,

        height: options.Height

    });

    dialogHelper.position(newDialog, DialogBody, minusHeight);

    return newDialog;

};

var changeDialogLayout = function(optionArg, dialogObj) {

    var options = {

        "Width": "70%",

        "Height": "90%"

    };

    if (optionArg) {

        for (var prop in optionArg) {

            options[prop] = optionArg[prop];

        }

    }

    var DialogBody = $(dialogObj).find(".Dialog_Body");

    var DialogHead = $(dialogObj).find(".Dialog_Head");

    var DialogFoot = $(dialogObj).find(".Dialog_Foot");

    var other =  Math.round(DialogBody.css("padding-top").replace(/[a-z]/ig, "")) + Math.round(DialogBody.css("padding-bottom").replace(/[a-z]/ig, ""));

    var minusHeight = DialogHead.outerHeight() + DialogFoot.outerHeight() + other;

    dialogObj.data("position", {

        width: options.Width,

        height: options.Height

    });

    dialogHelper.position(dialogObj, DialogBody, minusHeight);

};

以上就是本文所分享的全部内容了，希望大家能够喜欢。