amWiki.imgsView.js
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/**
* amWiki Web端 - 图片查看模块
* @author Tevin
*/
;(function (win, $) {
'use strict';
/**
* 图片查看器
* @param {Element} _this
* @constructor
*/
var ImgsView = function (_this) {
this.$e = {
container: $(_this), //文档主容器
imgList: null, //页面图片列表
imgsView: $('#imgsView'), //图片弹窗层
imgsViewInner: null, //图片容器
btnPrev: null,
btnNext: null
};
this._data = {
winW: 0,
winH: 0,
curIndex: -1
};
this._init();
};
/**
* 初始化
* @private
*/
ImgsView.prototype._init = function () {
var that = this;
this.$e.imgsViewInner = this.$e.imgsView.find('#imgsViewInner');
this.$e.btnPrev = this.$e.imgsView.find('.prev');
this.$e.btnNext = this.$e.imgsView.find('.next');
this._data.winW = $(win).width();
this._data.winH = $(win).height();
this.$e.container.on('click', function (e) {
if (e.target.tagName.toLowerCase() == 'img') {
//抓取图片列表
that.$e.imgList = that.$e.container.find('img');
that._data.curIndex = that.$e.imgList.index(e.target);
that.open();
}
});
this.$e.imgsView.children('.imgsv-background').on('click', function () {
that.close();
});
this.$e.imgsView.find('.original').on('click', function () {
that.resizeAs('org');
});
this.$e.imgsView.find('.suit').on('click', function () {
that.resizeAs('suit');
});
this.$e.imgsView.find('.prev').on('click', function () {
var $this = $(this);
if (!$this.hasClass('off')) {
that.playTo(that._data.curIndex - 1);
}
});
this.$e.imgsView.find('.next').on('click', function () {
var $this = $(this);
if (!$this.hasClass('off')) {
that.playTo(that._data.curIndex + 1);
}
});
};
/**
* 显示图片浏览弹层
* @public
*/
ImgsView.prototype.open = function () {
var that = this;
this.playTo(this._data.curIndex);
this.$e.imgsView.fadeIn(80);
setTimeout(function () {
that.$e.imgsView.addClass('on');
}, 50);
};
/**
* 关闭图片浏览弹层
* @public
*/
ImgsView.prototype.close = function () {
var that = this;
this.$e.imgsView.removeClass('on');
setTimeout(function () {
that.$e.imgsView.fadeOut(50);
}, 200);
that.$e.imgList = null;
that._data.curIndex = -1;
};
/**
* 切换图片
* @param {Number} index
* @public
*/
ImgsView.prototype.playTo = function (index) {
if (index == 0) {
this.$e.btnPrev.addClass('off');
} else {
this.$e.btnPrev.removeClass('off');
}
if (index == this.$e.imgList.length - 1) {
this.$e.btnNext.addClass('off');
} else {
this.$e.btnNext.removeClass('off');
}
this.$e.imgCur = this.$e.imgList.eq(index).clone().removeAttr('align');
this.resizeAs('suit');
this.$e.imgsViewInner.html(this.$e.imgCur);
this._data.curIndex = index;
};
/**
* 设置图片尺寸
* @param {String} type - 尺寸模式：suit 适合 ／ org 原大小
* @public
*/
ImgsView.prototype.resizeAs = function (type) {
if (type == 'suit') {
this.$e.imgCur.removeAttr('width').removeAttr('height');
if (this.$e.imgCur[0].naturalWidth > this._data.winW - 60) {
this.$e.imgCur.css('max-width', this._data.winW - 60);
}
if (this.$e.imgCur[0].naturalHeight > this._data.winH - 60) {
this.$e.imgCur.css('max-height', this._data.winH - 60);
}
} else if (type == 'org') {
this.$e.imgCur.removeAttr('style');
this.$e.imgCur.attr({
'width': this.$e.imgCur[0].naturalWidth,
'height': this.$e.imgCur[0].naturalHeight
});
}
};
//注册到 jQuery
$.extend($.fn, {
imgsView: function () {
return this.each(function () {
return new ImgsView(this);
});
}
});
})(window, jQuery);