ui.resizable.js

这是matlab的一个小程序

/*
 * jQuery UI Resizable
 *
 * Copyright (c) 2008 Paul Bakaus
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 * 
 * http://docs.jquery.com/UI/Resizables
 *
 * Depends:
 *	ui.core.js
 */
(function($) {

$.widget("ui.resizable", $.extend({}, $.ui.mouse, {
	init: function() {

		var self = this, o = this.options;

		var elpos = this.element.css('position');
		
		this.originalElement = this.element;
		
		// simulate .ui-resizable { position: relative; }
		this.element.addClass("ui-resizable").css({ position: /static/.test(elpos) ? 'relative' : elpos });
		
		$.extend(o, {
			_aspectRatio: !!(o.aspectRatio),
			helper: o.helper || o.ghost || o.animate ? o.helper || 'proxy' : null,
			knobHandles: o.knobHandles === true ? 'ui-resizable-knob-handle' : o.knobHandles
		});
		
		//Default Theme
		var aBorder = '1px solid #DEDEDE';
		
		o.defaultTheme = {
			'ui-resizable': { display: 'block' },
			'ui-resizable-handle': { position: 'absolute', background: '#F2F2F2', fontSize: '0.1px' },
			'ui-resizable-n': { cursor: 'n-resize', height: '4px', left: '0px', right: '0px', borderTop: aBorder },
			'ui-resizable-s': { cursor: 's-resize', height: '4px', left: '0px', right: '0px', borderBottom: aBorder },
			'ui-resizable-e': { cursor: 'e-resize', width: '4px', top: '0px', bottom: '0px', borderRight: aBorder },
			'ui-resizable-w': { cursor: 'w-resize', width: '4px', top: '0px', bottom: '0px', borderLeft: aBorder },
			'ui-resizable-se': { cursor: 'se-resize', width: '4px', height: '4px', borderRight: aBorder, borderBottom: aBorder },
			'ui-resizable-sw': { cursor: 'sw-resize', width: '4px', height: '4px', borderBottom: aBorder, borderLeft: aBorder },
			'ui-resizable-ne': { cursor: 'ne-resize', width: '4px', height: '4px', borderRight: aBorder, borderTop: aBorder },
			'ui-resizable-nw': { cursor: 'nw-resize', width: '4px', height: '4px', borderLeft: aBorder, borderTop: aBorder }
		};
		
		o.knobTheme = {
			'ui-resizable-handle': { background: '#F2F2F2', border: '1px solid #808080', height: '8px', width: '8px' },
			'ui-resizable-n': { cursor: 'n-resize', top: '0px', left: '45%' },
			'ui-resizable-s': { cursor: 's-resize', bottom: '0px', left: '45%' },
			'ui-resizable-e': { cursor: 'e-resize', right: '0px', top: '45%' },
			'ui-resizable-w': { cursor: 'w-resize', left: '0px', top: '45%' },
			'ui-resizable-se': { cursor: 'se-resize', right: '0px', bottom: '0px' },
			'ui-resizable-sw': { cursor: 'sw-resize', left: '0px', bottom: '0px' },
			'ui-resizable-nw': { cursor: 'nw-resize', left: '0px', top: '0px' },
			'ui-resizable-ne': { cursor: 'ne-resize', right: '0px', top: '0px' }
		};
		
		o._nodeName = this.element[0].nodeName;
		
		//Wrap the element if it cannot hold child nodes
		if(o._nodeName.match(/canvas|textarea|input|select|button|img/i)) {
			var el = this.element;
			
			//Opera fixing relative position
			if (/relative/.test(el.css('position')) && $.browser.opera)
				el.css({ position: 'relative', top: 'auto', left: 'auto' });
			
			//Create a wrapper element and set the wrapper to the new current internal element
			el.wrap(
				$('<div class="ui-wrapper"	style="overflow: hidden;"></div>').css( {
					position: el.css('position'),
					width: el.outerWidth(),
					height: el.outerHeight(),
					top: el.css('top'),
					left: el.css('left')
				})
			);
			
			var oel = this.element; this.element = this.element.parent();
			
			// store instance on wrapper
			this.element.data('resizable', this); 
			
			//Move margins to the wrapper
			this.element.css({ marginLeft: oel.css("marginLeft"), marginTop: oel.css("marginTop"),
				marginRight: oel.css("marginRight"), marginBottom: oel.css("marginBottom")
			});
			
			oel.css({ marginLeft: 0, marginTop: 0, marginRight: 0, marginBottom: 0});
			
			//Prevent Safari textarea resize
			if ($.browser.safari && o.preventDefault) oel.css('resize', 'none');
			
			o.proportionallyResize = oel.css({ position: 'static', zoom: 1, display: 'block' });
			
			// avoid IE jump
			this.element.css({ margin: oel.css('margin') });
			
			// fix handlers offset
			this._proportionallyResize();
		}
		
		if(!o.handles) o.handles = !$('.ui-resizable-handle', this.element).length ? "e,s,se" : { n: '.ui-resizable-n', e: '.ui-resizable-e', s: '.ui-resizable-s', w: '.ui-resizable-w', se: '.ui-resizable-se', sw: '.ui-resizable-sw', ne: '.ui-resizable-ne', nw: '.ui-resizable-nw' };
		if(o.handles.constructor == String) {
			
			o.zIndex = o.zIndex || 1000;
			
			if(o.handles == 'all') o.handles = 'n,e,s,w,se,sw,ne,nw';
			
			var n = o.handles.split(","); o.handles = {};
			
			// insertions are applied when don't have theme loaded
			var insertionsDefault = {
				handle: 'position: absolute; display: none; overflow:hidden;',
				n: 'top: 0pt; width:100%;',
				e: 'right: 0pt; height:100%;',
				s: 'bottom: 0pt; width:100%;',
				w: 'left: 0pt; height:100%;',
				se: 'bottom: 0pt; right: 0px;',
				sw: 'bottom: 0pt; left: 0px;',
				ne: 'top: 0pt; right: 0px;',
				nw: 'top: 0pt; left: 0px;'
			};
			
			for(var i = 0; i < n.length; i++) {
				var handle = $.trim(n[i]), dt = o.defaultTheme, hname = 'ui-resizable-'+handle, loadDefault = !$.ui.css(hname) && !o.knobHandles, userKnobClass = $.ui.css('ui-resizable-knob-handle'), 
							allDefTheme = $.extend(dt[hname], dt['ui-resizable-handle']), allKnobTheme = $.extend(o.knobTheme[hname], !userKnobClass ? o.knobTheme['ui-resizable-handle'] : {});
				
				// increase zIndex of sw, se, ne, nw axis
				var applyZIndex = /sw|se|ne|nw/.test(handle) ? { zIndex: ++o.zIndex } : {};
				
				var defCss = (loadDefault ? insertionsDefault[handle] : ''), 
					axis = $(['<div class="ui-resizable-handle ', hname, '" style="', defCss, insertionsDefault.handle, '"></div>'].join('')).css( applyZIndex );
				o.handles[handle] = '.ui-resizable-'+handle;
				
				this.element.append(
					//Theme detection, if not loaded, load o.defaultTheme
					axis.css( loadDefault ? allDefTheme : {} )
						// Load the knobHandle css, fix width, height, top, left...
						.css( o.knobHandles ? allKnobTheme : {} ).addClass(o.knobHandles ? 'ui-resizable-knob-handle' : '').addClass(o.knobHandles)
				);
			}
			
			if (o.knobHandles) this.element.addClass('ui-resizable-knob').css( !$.ui.css('ui-resizable-knob') ? { /*border: '1px #fff dashed'*/ } : {} );
		}
		
		this._renderAxis = function(target) {
			target = target || this.element;
			
			for(var i in o.handles) {
				if(o.handles[i].constructor == String) 
					o.handles[i] = $(o.handles[i], this.element).show();
				
				if (o.transparent)
					o.handles[i].css({opacity:0});
				
				//Apply pad to wrapper element, needed to fix axis position (textarea, inputs, scrolls)
				if (this.element.is('.ui-wrapper') && 
					o._nodeName.match(/textarea|input|select|button/i)) {
					
					var axis = $(o.handles[i], this.element), padWrapper = 0;
					
					//Checking the correct pad and border
					padWrapper = /sw|ne|nw|se|n|s/.test(i) ? axis.outerHeight() : axis.outerWidth();
					
					//The padding type i have to apply...
					var padPos = [ 'padding', 
						/ne|nw|n/.test(i) ? 'Top' :
						/se|sw|s/.test(i) ? 'Bottom' : 
						/^e$/.test(i) ? 'Right' : 'Left' ].join(""); 
					
					if (!o.transparent)
						target.css(padPos, padWrapper);
					
					this._proportionallyResize();
				}
				if(!$(o.handles[i]).length) continue;
			}
		};
		
		this._renderAxis(this.element);
		o._handles = $('.ui-resizable-handle', self.element);
		
		if (o.disableSelection)
			o._handles.each(function(i, e) { $.ui.disableSelection(e); });
		
		//Matching axis name
		o._handles.mouseover(function() {
			if (!o.resizing) {
				if (this.className) 
					var axis = this.className.match(/ui-resizable-(se|sw|ne|nw|n|e|s|w)/i);
				//Axis, default = se
				self.axis = o.axis = axis && axis[1] ? axis[1] : 'se';
			}
		});
		
		//If we want to auto hide the elements
		if (o.autoHide) {
			o._handles.hide();
			$(self.element).addClass("ui-resizable-autohide").hover(function() {
				$(this).removeClass("ui-resizable-autohide");
				o._handles.show();
			},
			function(){
				if (!o.resizing) {
					$(this).addClass("ui-resizable-autohide");
					o._handles.hide();
				}
			});
		}
		
		this.mouseInit();
	},
	plugins: {},
	ui: function() {
		return {
			originalElement: this.originalElement,
			element: this.element,
			helper: this.helper,
			position: this.position,
			size: this.size,
			options: this.options,
			originalSize: this.originalSize,
			originalPosition: this.originalPosition
		};
	},
	propagate: function(n,e) {
		$.ui.plugin.call(this, n, [e, this.ui()]);
		if (n != "resize") this.element.triggerHandler(["resize", n].join(""), [e, this.ui()], this.options[n]);
	},
	destroy: function() {
		var el = this.element, wrapped = el.children(".ui-resizable").get(0);
		
		this.mouseDestroy();
		
		var _destroy = function(exp) {
			$(exp).removeClass("ui-resizable ui-resizable-disabled")
				.removeData("resizable").unbind(".resizable").find('.ui-resizable-handle').remove();
		};
		
		_destroy(el);
		
		if (el.is('.ui-wrapper') && wrapped) {
			el.parent().append(
				$(wrapped).css({
					position: el.css('position'),
					width: el.outerWidth(),
					height: el.outerHeight(),
					top: el.css('top'),
					left: el.css('left')
				})
			).end().remove();
			
			_destroy(wrapped);
		}
	},
	mouseStart: function(e) {
		if(this.options.disabled) return false;
		
		var handle = false;
		for(var i in this.options.handles) {
			if($(this.options.handles[i])[0] == e.target) handle = true;
		}
		if (!handle) return false;
		
		var o = this.options, iniPos = this.element.position(), el = this.element, 
			num = function(v) { return parseInt(v, 10) || 0; }, ie6 = $.browser.msie && $.browser.version < 7;
		o.resizing = true;
		o.documentScroll = { top: $(document).scrollTop(), left: $(document).scrollLeft() };
		
		// bugfix #1749
		if (el.is('.ui-draggable') || (/absolute/).test(el.css('position'))) {
			
			// sOffset decides if document scrollOffset will be added to the top/left of the resizable element
			var sOffset = $.browser.msie && !o.containment && (/absolute/).test(el.css('position')) && !(/relative/).test(el.parent().css('position'));
			var dscrollt = sOffset ? o.documentScroll.top : 0, dscrolll = sOffset ? o.documentScroll.left : 0;
			
			el.css({ position: 'absolute', top: (iniPos.top + dscrollt), left: (iniPos.left + dscrolll) });
		}
		
		//Opera fixing relative position
		if ($.browser.opera && /relative/.test(el.css('position')))
			el.css({ position: 'relative', top: 'auto', left: 'auto' });
		
		this._renderProxy();
		
		var curleft = num(this.helper.css('left')), curtop = num(this.helper.css('top'));
		
		if (o.containment) {
			curleft += $(o.containment).scrollLeft()||0;
			curtop += $(o.containment).scrollTop()||0;
		}
		
		//Store needed variables
		this.offset = this.helper.offset();
		this.position = { left: curleft, top: curtop };
		this.size = o.helper || ie6 ? { width: el.outerWidth(), height: el.outerHeight() } : { width: el.width(), height: el.height() };
		this.originalSize = o.helper || ie6 ? { width: el.outerWidth(), height: el.outerHeight() } : { width: el.width(), height: el.height() };
		this.originalPosition = { left: curleft, top: curtop };
		this.sizeDiff = { width: el.outerWidth() - el.width(), height: el.outerHeight() - el.height() };
		this.originalMousePosition = { left: e.pageX, top: e.pageY };
		
		//Aspect Ratio
		o.aspectRatio = (typeof o.aspectRatio == 'number') ? o.aspectRatio : ((this.originalSize.height / this.originalSize.width)||1);
		
		if (o.preserveCursor)
			$('body').css('cursor', this.axis + '-resize');
			
		this.propagate("start", e);
		return true;
	},
	mouseDrag: function(e) {
		
		//Increase performance, avoid regex
		var el = this.helper, o = this.options, props = {},
			self = this, smp = this.originalMousePosition, a = this.axis;
		
		var dx = (e.pageX-smp.left)||0, dy = (e.pageY-smp.top)||0;
		var trigger = this._change[a];
		if (!trigger) return false;
		
		// Calculate the attrs that will be change
		var data = trigger.apply(this, [e, dx, dy]), ie6 = $.browser.msie && $.browser.version < 7, csdif = this.sizeDiff;
		
		if (o._aspectRatio || e.shiftKey)
			data = this._updateRatio(data, e);
		
		data = this._respectSize(data, e);
		
		// plugins callbacks need to be called first
		this.propagate("resize", e);
		
		el.css({
			top: this.position.top + "px", left: this.position.left + "px", 
			width: this.size.width + "px", height: this.size.height + "px"
		});
		
		if (!o.helper && o.proportionallyResize)
			this._proportionallyResize();
		
		this._updateCache(data);
		
		// calling the user callback at the end
		this.element.triggerHandler("resize", [e, this.ui()], this.options["resize"]);
		
		return false;
	},
	mouseStop: function(e) {
		
		this.options.resizing = false;
		var o = this.options, num = function(v) { return parseInt(v, 10) || 0; }, self = this;
		
		if(o.helper) {
			var pr = o.proportionallyResize, ista = pr && (/textarea/i).test(pr.get(0).nodeName), 
						soffseth = ista && $.ui.hasScroll(pr.get(0), 'left') /* TODO - jump height */ ? 0 : self.sizeDiff.height,
							soffsetw = ista ? 0 : self.sizeDiff.width;
			
			var s = { width: (self.size.width - soffsetw), height: (self.size.height - soffseth) },
				left = (parseInt(self.element.css('left'), 10) + (self.position.left - self.originalPosition.left)) || null, 
				top = (parseInt(self.element.css('top'), 10) + (self.position.top - self.originalPosition.top)) || null;
			
			if (!o.animate)
				this.element.css($.extend(s, { top: top, left: left }));
			
			if (o.helper && !o.animate) this._proportionallyResize();
		}
		
		if (o.preserveCursor)
			$('body').css('cursor', 'auto');
		
		this.propagate("stop", e);
		
		if (o.helper) this.helper.remove();
		
		return false;
	},
	_updateCache: function(data) {
		var o = this.options;
		this.offset = this.helper.offset();
		if (data.left) this.position.left = data.left;
		if (data.top) this.position.top = data.top;
		if (data.height) this.size.height = data.height;
		if (data.width) this.size.width = data.width;