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- <title>The source code</title>
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- <pre class="prettyprint lang-js">/*!
- * Ext JS Library 3.3.0
- * Copyright(c) 2006-2010 Ext JS, Inc.
- * licensing@extjs.com
- * http://www.extjs.com/license
- */
-/**
- * @class Ext.Element
- */
-Ext.Element.addMethods({
- <div id="method-Ext.Element-getAnchorXY"></div>/**
- * Gets the x,y coordinates specified by the anchor position on the element.
- * @param {String} anchor (optional) The specified anchor position (defaults to "c"). See {@link #alignTo}
- * for details on supported anchor positions.
- * @param {Boolean} local (optional) True to get the local (element top/left-relative) anchor position instead
- * of page coordinates
- * @param {Object} size (optional) An object containing the size to use for calculating anchor position
- * {width: (target width), height: (target height)} (defaults to the element's current size)
- * @return {Array} [x, y] An array containing the element's x and y coordinates
- */
- getAnchorXY : function(anchor, local, s){
- //Passing a different size is useful for pre-calculating anchors,
- //especially for anchored animations that change the el size.
- anchor = (anchor || "tl").toLowerCase();
- s = s || {};
-
- var me = this,
- vp = me.dom == document.body || me.dom == document,
- w = s.width || vp ? Ext.lib.Dom.getViewWidth() : me.getWidth(),
- h = s.height || vp ? Ext.lib.Dom.getViewHeight() : me.getHeight(),
- xy,
- r = Math.round,
- o = me.getXY(),
- scroll = me.getScroll(),
- extraX = vp ? scroll.left : !local ? o[0] : 0,
- extraY = vp ? scroll.top : !local ? o[1] : 0,
- hash = {
- c : [r(w * 0.5), r(h * 0.5)],
- t : [r(w * 0.5), 0],
- l : [0, r(h * 0.5)],
- r : [w, r(h * 0.5)],
- b : [r(w * 0.5), h],
- tl : [0, 0],
- bl : [0, h],
- br : [w, h],
- tr : [w, 0]
- };
-
- xy = hash[anchor];
- return [xy[0] + extraX, xy[1] + extraY];
- },
-
- <div id="method-Ext.Element-anchorTo"></div>/**
- * Anchors an element to another element and realigns it when the window is resized.
- * @param {Mixed} element The element to align to.
- * @param {String} position The position to align to.
- * @param {Array} offsets (optional) Offset the positioning by [x, y]
- * @param {Boolean/Object} animate (optional) True for the default animation or a standard Element animation config object
- * @param {Boolean/Number} monitorScroll (optional) True to monitor body scroll and reposition. If this parameter
- * is a number, it is used as the buffer delay (defaults to 50ms).
- * @param {Function} callback The function to call after the animation finishes
- * @return {Ext.Element} this
- */
- anchorTo : function(el, alignment, offsets, animate, monitorScroll, callback){
- var me = this,
- dom = me.dom,
- scroll = !Ext.isEmpty(monitorScroll),
- action = function(){
- Ext.fly(dom).alignTo(el, alignment, offsets, animate);
- Ext.callback(callback, Ext.fly(dom));
- },
- anchor = this.getAnchor();
-
- // previous listener anchor, remove it
- this.removeAnchor();
- Ext.apply(anchor, {
- fn: action,
- scroll: scroll
- });
-
- Ext.EventManager.onWindowResize(action, null);
-
- if(scroll){
- Ext.EventManager.on(window, 'scroll', action, null,
- {buffer: !isNaN(monitorScroll) ? monitorScroll : 50});
- }
- action.call(me); // align immediately
- return me;
- },
-
- <div id="method-Ext.Element-removeAnchor"></div>/**
- * Remove any anchor to this element. See {@link #anchorTo}.
- * @return {Ext.Element} this
- */
- removeAnchor : function(){
- var me = this,
- anchor = this.getAnchor();
-
- if(anchor && anchor.fn){
- Ext.EventManager.removeResizeListener(anchor.fn);
- if(anchor.scroll){
- Ext.EventManager.un(window, 'scroll', anchor.fn);
- }
- delete anchor.fn;
- }
- return me;
- },
-
- // private
- getAnchor : function(){
- var data = Ext.Element.data,
- dom = this.dom;
- if (!dom) {
- return;
- }
- var anchor = data(dom, '_anchor');
-
- if(!anchor){
- anchor = data(dom, '_anchor', {});
- }
- return anchor;
- },
-
- <div id="method-Ext.Element-getAlignToXY"></div>/**
- * Gets the x,y coordinates to align this element with another element. See {@link #alignTo} for more info on the
- * supported position values.
- * @param {Mixed} element The element to align to.
- * @param {String} position (optional, defaults to "tl-bl?") The position to align to.
- * @param {Array} offsets (optional) Offset the positioning by [x, y]
- * @return {Array} [x, y]
- */
- getAlignToXY : function(el, p, o){
- el = Ext.get(el);
-
- if(!el || !el.dom){
- throw "Element.alignToXY with an element that doesn't exist";
- }
-
- o = o || [0,0];
- p = (!p || p == "?" ? "tl-bl?" : (!(/-/).test(p) && p !== "" ? "tl-" + p : p || "tl-bl")).toLowerCase();
-
- var me = this,
- d = me.dom,
- a1,
- a2,
- x,
- y,
- //constrain the aligned el to viewport if necessary
- w,
- h,
- r,
- dw = Ext.lib.Dom.getViewWidth() -10, // 10px of margin for ie
- dh = Ext.lib.Dom.getViewHeight()-10, // 10px of margin for ie
- p1y,
- p1x,
- p2y,
- p2x,
- swapY,
- swapX,
- doc = document,
- docElement = doc.documentElement,
- docBody = doc.body,
- scrollX = (docElement.scrollLeft || docBody.scrollLeft || 0)+5,
- scrollY = (docElement.scrollTop || docBody.scrollTop || 0)+5,
- c = false, //constrain to viewport
- p1 = "",
- p2 = "",
- m = p.match(/^([a-z]+)-([a-z]+)(\?)?$/);
-
- if(!m){
- throw "Element.alignTo with an invalid alignment " + p;
- }
-
- p1 = m[1];
- p2 = m[2];
- c = !!m[3];
-
- //Subtract the aligned el's internal xy from the target's offset xy
- //plus custom offset to get the aligned el's new offset xy
- a1 = me.getAnchorXY(p1, true);
- a2 = el.getAnchorXY(p2, false);
-
- x = a2[0] - a1[0] + o[0];
- y = a2[1] - a1[1] + o[1];
-
- if(c){
- w = me.getWidth();
- h = me.getHeight();
- r = el.getRegion();
- //If we are at a viewport boundary and the aligned el is anchored on a target border that is
- //perpendicular to the vp border, allow the aligned el to slide on that border,
- //otherwise swap the aligned el to the opposite border of the target.
- p1y = p1.charAt(0);
- p1x = p1.charAt(p1.length-1);
- p2y = p2.charAt(0);
- p2x = p2.charAt(p2.length-1);
- swapY = ((p1y=="t" && p2y=="b") || (p1y=="b" && p2y=="t"));
- swapX = ((p1x=="r" && p2x=="l") || (p1x=="l" && p2x=="r"));
-
-
- if (x + w > dw + scrollX) {
- x = swapX ? r.left-w : dw+scrollX-w;
- }
- if (x < scrollX) {
- x = swapX ? r.right : scrollX;
- }
- if (y + h > dh + scrollY) {
- y = swapY ? r.top-h : dh+scrollY-h;
- }
- if (y < scrollY){
- y = swapY ? r.bottom : scrollY;
- }
- }
- return [x,y];
- },
-
- <div id="method-Ext.Element-alignTo"></div>/**
- * Aligns this element with another element relative to the specified anchor points. If the other element is the
- * document it aligns it to the viewport.
- * The position parameter is optional, and can be specified in any one of the following formats:
- * <ul>
- * <li><b>Blank</b>: Defaults to aligning the element's top-left corner to the target's bottom-left corner ("tl-bl").</li>
- * <li><b>One anchor (deprecated)</b>: The passed anchor position is used as the target element's anchor point.
- * The element being aligned will position its top-left corner (tl) to that point. <i>This method has been
- * deprecated in favor of the newer two anchor syntax below</i>.</li>
- * <li><b>Two anchors</b>: If two values from the table below are passed separated by a dash, the first value is used as the
- * element's anchor point, and the second value is used as the target's anchor point.</li>
- * </ul>
- * In addition to the anchor points, the position parameter also supports the "?" character. If "?" is passed at the end of
- * the position string, the element will attempt to align as specified, but the position will be adjusted to constrain to
- * the viewport if necessary. Note that the element being aligned might be swapped to align to a different position than
- * that specified in order to enforce the viewport constraints.
- * Following are all of the supported anchor positions:
-<pre>
-Value Description
------ -----------------------------
-tl The top left corner (default)
-t The center of the top edge
-tr The top right corner
-l The center of the left edge
-c In the center of the element
-r The center of the right edge
-bl The bottom left corner
-b The center of the bottom edge
-br The bottom right corner
-</pre>
-Example Usage:
-<pre><code>
-// align el to other-el using the default positioning ("tl-bl", non-constrained)
-el.alignTo("other-el");
-
-// align the top left corner of el with the top right corner of other-el (constrained to viewport)
-el.alignTo("other-el", "tr?");
-
-// align the bottom right corner of el with the center left edge of other-el
-el.alignTo("other-el", "br-l?");
-
-// align the center of el with the bottom left corner of other-el and
-// adjust the x position by -6 pixels (and the y position by 0)
-el.alignTo("other-el", "c-bl", [-6, 0]);
-</code></pre>
- * @param {Mixed} element The element to align to.
- * @param {String} position (optional, defaults to "tl-bl?") The position to align to.
- * @param {Array} offsets (optional) Offset the positioning by [x, y]
- * @param {Boolean/Object} animate (optional) true for the default animation or a standard Element animation config object
- * @return {Ext.Element} this
- */
- alignTo : function(element, position, offsets, animate){
- var me = this;
- return me.setXY(me.getAlignToXY(element, position, offsets),
- me.preanim && !!animate ? me.preanim(arguments, 3) : false);
- },
-
- // private ==> used outside of core
- adjustForConstraints : function(xy, parent, offsets){
- return this.getConstrainToXY(parent || document, false, offsets, xy) || xy;
- },
-
- // private ==> used outside of core
- getConstrainToXY : function(el, local, offsets, proposedXY){
- var os = {top:0, left:0, bottom:0, right: 0};
-
- return function(el, local, offsets, proposedXY){
- el = Ext.get(el);
- offsets = offsets ? Ext.applyIf(offsets, os) : os;
-
- var vw, vh, vx = 0, vy = 0;
- if(el.dom == document.body || el.dom == document){
- vw =Ext.lib.Dom.getViewWidth();
- vh = Ext.lib.Dom.getViewHeight();
- }else{
- vw = el.dom.clientWidth;
- vh = el.dom.clientHeight;
- if(!local){
- var vxy = el.getXY();
- vx = vxy[0];
- vy = vxy[1];
- }
- }
-
- var s = el.getScroll();
-
- vx += offsets.left + s.left;
- vy += offsets.top + s.top;
-
- vw -= offsets.right;
- vh -= offsets.bottom;
-
- var vr = vx + vw,
- vb = vy + vh,
- xy = proposedXY || (!local ? this.getXY() : [this.getLeft(true), this.getTop(true)]),
- x = xy[0], y = xy[1],
- offset = this.getConstrainOffset(),
- w = this.dom.offsetWidth + offset,
- h = this.dom.offsetHeight + offset;
-
- // only move it if it needs it
- var moved = false;
-
- // first validate right/bottom
- if((x + w) > vr){
- x = vr - w;
- moved = true;
- }
- if((y + h) > vb){
- y = vb - h;
- moved = true;
- }
- // then make sure top/left isn't negative
- if(x < vx){
- x = vx;
- moved = true;
- }
- if(y < vy){
- y = vy;
- moved = true;
- }
- return moved ? [x, y] : false;
- };
- }(),
-
-
-
-// el = Ext.get(el);
-// offsets = Ext.applyIf(offsets || {}, {top : 0, left : 0, bottom : 0, right : 0});
-
-// var me = this,
-// doc = document,
-// s = el.getScroll(),
-// vxy = el.getXY(),
-// vx = offsets.left + s.left,
-// vy = offsets.top + s.top,
-// vw = -offsets.right,
-// vh = -offsets.bottom,
-// vr,
-// vb,
-// xy = proposedXY || (!local ? me.getXY() : [me.getLeft(true), me.getTop(true)]),
-// x = xy[0],
-// y = xy[1],
-// w = me.dom.offsetWidth, h = me.dom.offsetHeight,
-// moved = false; // only move it if it needs it
-//
-//
-// if(el.dom == doc.body || el.dom == doc){
-// vw += Ext.lib.Dom.getViewWidth();
-// vh += Ext.lib.Dom.getViewHeight();
-// }else{
-// vw += el.dom.clientWidth;
-// vh += el.dom.clientHeight;
-// if(!local){
-// vx += vxy[0];
-// vy += vxy[1];
-// }
-// }
-
-// // first validate right/bottom
-// if(x + w > vx + vw){
-// x = vx + vw - w;
-// moved = true;
-// }
-// if(y + h > vy + vh){
-// y = vy + vh - h;
-// moved = true;
-// }
-// // then make sure top/left isn't negative
-// if(x < vx){
-// x = vx;
-// moved = true;
-// }
-// if(y < vy){
-// y = vy;
-// moved = true;
-// }
-// return moved ? [x, y] : false;
-// },
-
- // private, used internally
- getConstrainOffset : function(){
- return 0;
- },
-
- <div id="method-Ext.Element-getCenterXY"></div>/**
- * Calculates the x, y to center this element on the screen
- * @return {Array} The x, y values [x, y]
- */
- getCenterXY : function(){
- return this.getAlignToXY(document, 'c-c');
- },
-
- <div id="method-Ext.Element-center"></div>/**
- * Centers the Element in either the viewport, or another Element.
- * @param {Mixed} centerIn (optional) The element in which to center the element.
- */
- center : function(centerIn){
- return this.alignTo(centerIn || document, 'c-c');
- }
-});
-</pre>
-</body>
-</html>
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