Public/BJUI/js/bjui-basedrag.js

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/*!
 * B-JUI v1.0 (http://b-jui.com)
 * Git@OSC (http://git.oschina.net/xknaan/B-JUI)
 * Copyright 2014 K'naan (xknaan@163.com).
 * Licensed under Apache (http://www.apache.org/licenses/LICENSE-2.0)
 */

/* ========================================================================
 * B-JUI: bjui-basedrag.js v1.0
 * @author K'naan (xknaan@163.com)
 * -- Modified from dwz.drag.js (author:Roger Wu)
 * http://git.oschina.net/xknaan/B-JUI/blob/master/BJUI/js/bjui-basedrag.js
 * ========================================================================
 * Copyright 2014 K'naan.
 * Licensed under Apache (http://www.apache.org/licenses/LICENSE-2.0)
 * ======================================================================== */

+function ($) {
    'use strict';

    // BASEDRAG CLASS DEFINITION
    // ======================
    
    var Basedrag = function(element, options) {
        this.$element = $(element)
        this.options  = options
    }
    
    Basedrag.prototype.init = function() {
        var that = this
        
        this.options.$obj = this.$element
        if (this.options.obj) this.options.$obj = this.options.obj
        if (this.options.event)
            this.start(this.options.event)
        else
            this.$element.find(this.options.selector).bind('mousedown', function(e) { that.start.apply(that, [e]) })
    }
    
    Basedrag.prototype.start = function(e) {
        document.onselectstart = function(e) { return false } //禁止选择
        var that = this
        
        this.options.oleft = parseInt(this.$element.css('left')) || 0
        this.options.otop  = parseInt(this.$element.css('top')) || 0
        $(document).bind('mouseup.bjui.basedrag', function(e) { that.stop.apply(that, [e]) })
            .bind('mousemove.bjui.basedrag', function(e) { that.drag.apply(that, [e]) })
    }
    
    Basedrag.prototype.drag = function(e) {
        if (!e) e = window.event
        var options = this.options
        var left    = (options.oleft + (e.pageX || e.clientX) - options.event.pageX)
        var top     = (options.otop + (e.pageY || e.clientY) - options.event.pageY)
        
        if (top < 1) top = 0
        if (options.move == 'horizontal') {
            if ((options.minW && left >= parseInt(this.options.$obj.css('left')) + options.minW) && (options.maxW && left <= parseInt(this.options.$obj.css('left')) + options.maxW)) {
                this.$element.css('left', left)
            } else if (options.scop) {
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