root / trunk / web / dojo / dojox / mdnd / AutoScroll.js
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| 1 | 9 | andrej.cim | /*
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| 2 | Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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| 3 | Available via Academic Free License >= 2.1 OR the modified BSD license.
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| 4 | see: http://dojotoolkit.org/license for details
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| 5 | */
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| 6 | |||
| 7 | |||
| 8 | if(!dojo._hasResource["dojox.mdnd.AutoScroll"]){ |
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| 9 | dojo._hasResource["dojox.mdnd.AutoScroll"]=true; |
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| 10 | dojo.provide("dojox.mdnd.AutoScroll");
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| 11 | dojo.declare("dojox.mdnd.AutoScroll",null,{interval:3,recursiveTimer:10,marginMouse:50,constructor:function(){ |
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| 12 | this.resizeHandler=dojo.connect(dojo.global,"onresize",this,function(){ |
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| 13 | this.getViewport();
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| 14 | }); |
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| 15 | dojo.ready(dojo.hitch(this,"init")); |
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| 16 | },init:function(){ |
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| 17 | this._html=(dojo.isWebKit)?dojo.body():dojo.body().parentNode;
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| 18 | this.getViewport();
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| 19 | },getViewport:function(){ |
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| 20 | var d=dojo.doc,dd=d.documentElement,w=window,b=dojo.body();
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| 21 | if(dojo.isMozilla){
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| 22 | this._v={"w":dd.clientWidth,"h":w.innerHeight}; |
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| 23 | }else{
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| 24 | if(!dojo.isOpera&&w.innerWidth){
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| 25 | this._v={"w":w.innerWidth,"h":w.innerHeight}; |
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| 26 | }else{
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| 27 | if(!dojo.isOpera&&dd&&dd.clientWidth){
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| 28 | this._v={"w":dd.clientWidth,"h":dd.clientHeight}; |
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| 29 | }else{
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| 30 | if(b.clientWidth){
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| 31 | this._v={"w":b.clientWidth,"h":b.clientHeight}; |
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| 32 | } |
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| 33 | } |
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| 34 | } |
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| 35 | } |
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| 36 | },setAutoScrollNode:function(_1){ |
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| 37 | this._node=_1;
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| 38 | },setAutoScrollMaxPage:function(){ |
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| 39 | this._yMax=this._html.scrollHeight; |
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| 40 | this._xMax=this._html.scrollWidth; |
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| 41 | },checkAutoScroll:function(e){ |
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| 42 | if(this._autoScrollActive){ |
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| 43 | this.stopAutoScroll();
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| 44 | } |
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| 45 | this._y=e.pageY;
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| 46 | this._x=e.pageX;
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| 47 | if(e.clientX<this.marginMouse){ |
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| 48 | this._autoScrollActive=true; |
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| 49 | this._autoScrollLeft(e);
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| 50 | }else{
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| 51 | if(e.clientX>this._v.w-this.marginMouse){ |
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| 52 | this._autoScrollActive=true; |
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| 53 | this._autoScrollRight(e);
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| 54 | } |
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| 55 | } |
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| 56 | if(e.clientY<this.marginMouse){ |
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| 57 | this._autoScrollActive=true; |
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| 58 | this._autoScrollUp(e);
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| 59 | }else{
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| 60 | if(e.clientY>this._v.h-this.marginMouse){ |
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| 61 | this._autoScrollActive=true; |
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| 62 | this._autoScrollDown();
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| 63 | } |
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| 64 | } |
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| 65 | },_autoScrollDown:function(){ |
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| 66 | if(this._timer){ |
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| 67 | clearTimeout(this._timer);
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| 68 | } |
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| 69 | if(this._autoScrollActive&&this._y+this.marginMouse<this._yMax){ |
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| 70 | this._html.scrollTop+=this.interval; |
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| 71 | this._node.style.top=(parseInt(this._node.style.top)+this.interval)+"px"; |
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| 72 | this._y+=this.interval; |
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| 73 | this._timer=setTimeout(dojo.hitch(this,"_autoScrollDown"),this.recursiveTimer); |
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| 74 | } |
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| 75 | },_autoScrollUp:function(){ |
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| 76 | if(this._timer){ |
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| 77 | clearTimeout(this._timer);
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| 78 | } |
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| 79 | if(this._autoScrollActive&&this._y-this.marginMouse>0){ |
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| 80 | this._html.scrollTop-=this.interval; |
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| 81 | this._node.style.top=(parseInt(this._node.style.top)-this.interval)+"px"; |
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| 82 | this._y-=this.interval; |
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| 83 | this._timer=setTimeout(dojo.hitch(this,"_autoScrollUp"),this.recursiveTimer); |
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| 84 | } |
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| 85 | },_autoScrollRight:function(){ |
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| 86 | if(this._timer){ |
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| 87 | clearTimeout(this._timer);
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| 88 | } |
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| 89 | if(this._autoScrollActive&&this._x+this.marginMouse<this._xMax){ |
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| 90 | this._html.scrollLeft+=this.interval; |
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| 91 | this._node.style.left=(parseInt(this._node.style.left)+this.interval)+"px"; |
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| 92 | this._x+=this.interval; |
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| 93 | this._timer=setTimeout(dojo.hitch(this,"_autoScrollRight"),this.recursiveTimer); |
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| 94 | } |
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| 95 | },_autoScrollLeft:function(e){ |
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| 96 | if(this._timer){ |
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| 97 | clearTimeout(this._timer);
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| 98 | } |
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| 99 | if(this._autoScrollActive&&this._x-this.marginMouse>0){ |
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| 100 | this._html.scrollLeft-=this.interval; |
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| 101 | this._node.style.left=(parseInt(this._node.style.left)-this.interval)+"px"; |
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| 102 | this._x-=this.interval; |
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| 103 | this._timer=setTimeout(dojo.hitch(this,"_autoScrollLeft"),this.recursiveTimer); |
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| 104 | } |
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| 105 | },stopAutoScroll:function(){ |
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| 106 | if(this._timer){ |
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| 107 | clearTimeout(this._timer);
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| 108 | } |
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| 109 | this._autoScrollActive=false; |
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| 110 | },destroy:function(){ |
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| 111 | dojo.disconnect(this.resizeHandler);
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| 112 | }}); |
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| 113 | dojox.mdnd.autoScroll=null;
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| 114 | (function(){
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| 115 | dojox.mdnd.autoScroll=new dojox.mdnd.AutoScroll();
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| 116 | }()); |
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| 117 | } |