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<title>The source code</title>
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<pre class="prettyprint lang-js">/**
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* @class Ext.Element
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*/
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Ext.Element.addMethods({
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<div id="method-Ext.Element-scrollTo"></div>/**
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* Scrolls this element the specified scroll point. It does NOT do bounds checking so if you scroll to a weird value it will try to do it. For auto bounds checking, use scroll().
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* @param {String} side Either "left" for scrollLeft values or "top" for scrollTop values.
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* @param {Number} value The new scroll value
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* @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
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* @return {Element} this
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*/
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scrollTo : function(side, value, animate){
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var top = /top/i.test(side), //check if we're scrolling top or left
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me = this,
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dom = me.dom,
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prop;
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if (!animate || !me.anim) {
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prop = 'scroll' + (top ? 'Top' : 'Left'), // just setting the value, so grab the direction
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dom[prop] = value;
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}else{
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prop = 'scroll' + (top ? 'Left' : 'Top'), // if scrolling top, we need to grab scrollLeft, if left, scrollTop
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me.anim({scroll: {to: top ? [dom[prop], value] : [value, dom[prop]]}},
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me.preanim(arguments, 2), 'scroll');
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}
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return me;
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},
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<div id="method-Ext.Element-scrollIntoView"></div>/**
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* Scrolls this element into view within the passed container.
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* @param {Mixed} container (optional) The container element to scroll (defaults to document.body). Should be a
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* string (id), dom node, or Ext.Element.
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* @param {Boolean} hscroll (optional) False to disable horizontal scroll (defaults to true)
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* @return {Ext.Element} this
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*/
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scrollIntoView : function(container, hscroll){
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var c = Ext.getDom(container) || Ext.getBody().dom,
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el = this.dom,
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o = this.getOffsetsTo(c),
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l = o[0] + c.scrollLeft,
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t = o[1] + c.scrollTop,
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b = t + el.offsetHeight,
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r = l + el.offsetWidth,
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ch = c.clientHeight,
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ct = parseInt(c.scrollTop, 10),
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cl = parseInt(c.scrollLeft, 10),
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cb = ct + ch,
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cr = cl + c.clientWidth;
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if (el.offsetHeight > ch || t < ct) {
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c.scrollTop = t;
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} else if (b > cb){
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c.scrollTop = b-ch;
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}
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c.scrollTop = c.scrollTop; // corrects IE, other browsers will ignore
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if(hscroll !== false){
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if(el.offsetWidth > c.clientWidth || l < cl){
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c.scrollLeft = l;
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}else if(r > cr){
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c.scrollLeft = r - c.clientWidth;
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}
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c.scrollLeft = c.scrollLeft;
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}
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return this;
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},
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// private
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scrollChildIntoView : function(child, hscroll){
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Ext.fly(child, '_scrollChildIntoView').scrollIntoView(this, hscroll);
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},
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<div id="method-Ext.Element-scroll"></div>/**
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* Scrolls this element the specified direction. Does bounds checking to make sure the scroll is
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* within this element's scrollable range.
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* @param {String} direction Possible values are: "l" (or "left"), "r" (or "right"), "t" (or "top", or "up"), "b" (or "bottom", or "down").
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* @param {Number} distance How far to scroll the element in pixels
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* @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
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* @return {Boolean} Returns true if a scroll was triggered or false if the element
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* was scrolled as far as it could go.
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*/
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scroll : function(direction, distance, animate){
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if(!this.isScrollable()){
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return;
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}
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var el = this.dom,
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l = el.scrollLeft, t = el.scrollTop,
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w = el.scrollWidth, h = el.scrollHeight,
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cw = el.clientWidth, ch = el.clientHeight,
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scrolled = false, v,
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hash = {
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l: Math.min(l + distance, w-cw),
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r: v = Math.max(l - distance, 0),
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t: Math.max(t - distance, 0),
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b: Math.min(t + distance, h-ch)
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};
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hash.d = hash.b;
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hash.u = hash.t;
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direction = direction.substr(0, 1);
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if((v = hash[direction]) > -1){
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scrolled = true;
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this.scrollTo(direction == 'l' || direction == 'r' ? 'left' : 'top', v, this.preanim(arguments, 2));
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}
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return scrolled;
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}
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});</pre>
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