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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
- */
- Ext.lib.Region = function(t, r, b, l) {
- var me = this;
- me.top = t;
- me[1] = t;
- me.right = r;
- me.bottom = b;
- me.left = l;
- me[0] = l;
- };
-
- Ext.lib.Region.prototype = {
- contains : function(region) {
- var me = this;
- return ( region.left >= me.left &&
- region.right <= me.right &&
- region.top >= me.top &&
- region.bottom <= me.bottom );
-
- },
-
- getArea : function() {
- var me = this;
- return ( (me.bottom - me.top) * (me.right - me.left) );
- },
-
- intersect : function(region) {
- var me = this,
- t = Math.max(me.top, region.top),
- r = Math.min(me.right, region.right),
- b = Math.min(me.bottom, region.bottom),
- l = Math.max(me.left, region.left);
-
- if (b >= t && r >= l) {
- return new Ext.lib.Region(t, r, b, l);
- }
- },
-
- union : function(region) {
- var me = this,
- t = Math.min(me.top, region.top),
- r = Math.max(me.right, region.right),
- b = Math.max(me.bottom, region.bottom),
- l = Math.min(me.left, region.left);
-
- return new Ext.lib.Region(t, r, b, l);
- },
-
- constrainTo : function(r) {
- var me = this;
- me.top = me.top.constrain(r.top, r.bottom);
- me.bottom = me.bottom.constrain(r.top, r.bottom);
- me.left = me.left.constrain(r.left, r.right);
- me.right = me.right.constrain(r.left, r.right);
- return me;
- },
-
- adjust : function(t, l, b, r) {
- var me = this;
- me.top += t;
- me.left += l;
- me.right += r;
- me.bottom += b;
- return me;
- }
- };
-
- Ext.lib.Region.getRegion = function(el) {
- var p = Ext.lib.Dom.getXY(el),
- t = p[1],
- r = p[0] + el.offsetWidth,
- b = p[1] + el.offsetHeight,
- l = p[0];
-
- return new Ext.lib.Region(t, r, b, l);
- };</pre>
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