--- /dev/null
+<html>\r
+<head>\r
+ <title>The source code</title>\r
+ <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />\r
+ <script type="text/javascript" src="../resources/prettify/prettify.js"></script>\r
+</head>\r
+<body onload="prettyPrint();">\r
+ <pre class="prettyprint lang-js"><div id="cls-Ext.dd.ScrollManager"></div>/**\r
+ * @class Ext.dd.ScrollManager\r
+ * <p>Provides automatic scrolling of overflow regions in the page during drag operations.</p>\r
+ * <p>The ScrollManager configs will be used as the defaults for any scroll container registered with it,\r
+ * but you can also override most of the configs per scroll container by adding a \r
+ * <tt>ddScrollConfig</tt> object to the target element that contains these properties: {@link #hthresh},\r
+ * {@link #vthresh}, {@link #increment} and {@link #frequency}. Example usage:\r
+ * <pre><code>\r
+var el = Ext.get('scroll-ct');\r
+el.ddScrollConfig = {\r
+ vthresh: 50,\r
+ hthresh: -1,\r
+ frequency: 100,\r
+ increment: 200\r
+};\r
+Ext.dd.ScrollManager.register(el);\r
+</code></pre>\r
+ * <b>Note: This class uses "Point Mode" and is untested in "Intersect Mode".</b>\r
+ * @singleton\r
+ */\r
+Ext.dd.ScrollManager = function(){\r
+ var ddm = Ext.dd.DragDropMgr;\r
+ var els = {};\r
+ var dragEl = null;\r
+ var proc = {};\r
+ \r
+ var onStop = function(e){\r
+ dragEl = null;\r
+ clearProc();\r
+ };\r
+ \r
+ var triggerRefresh = function(){\r
+ if(ddm.dragCurrent){\r
+ ddm.refreshCache(ddm.dragCurrent.groups);\r
+ }\r
+ };\r
+ \r
+ var doScroll = function(){\r
+ if(ddm.dragCurrent){\r
+ var dds = Ext.dd.ScrollManager;\r
+ var inc = proc.el.ddScrollConfig ?\r
+ proc.el.ddScrollConfig.increment : dds.increment;\r
+ if(!dds.animate){\r
+ if(proc.el.scroll(proc.dir, inc)){\r
+ triggerRefresh();\r
+ }\r
+ }else{\r
+ proc.el.scroll(proc.dir, inc, true, dds.animDuration, triggerRefresh);\r
+ }\r
+ }\r
+ };\r
+ \r
+ var clearProc = function(){\r
+ if(proc.id){\r
+ clearInterval(proc.id);\r
+ }\r
+ proc.id = 0;\r
+ proc.el = null;\r
+ proc.dir = "";\r
+ };\r
+ \r
+ var startProc = function(el, dir){\r
+ clearProc();\r
+ proc.el = el;\r
+ proc.dir = dir;\r
+ var freq = (el.ddScrollConfig && el.ddScrollConfig.frequency) ? \r
+ el.ddScrollConfig.frequency : Ext.dd.ScrollManager.frequency;\r
+ proc.id = setInterval(doScroll, freq);\r
+ };\r
+ \r
+ var onFire = function(e, isDrop){\r
+ if(isDrop || !ddm.dragCurrent){ return; }\r
+ var dds = Ext.dd.ScrollManager;\r
+ if(!dragEl || dragEl != ddm.dragCurrent){\r
+ dragEl = ddm.dragCurrent;\r
+ // refresh regions on drag start\r
+ dds.refreshCache();\r
+ }\r
+ \r
+ var xy = Ext.lib.Event.getXY(e);\r
+ var pt = new Ext.lib.Point(xy[0], xy[1]);\r
+ for(var id in els){\r
+ var el = els[id], r = el._region;\r
+ var c = el.ddScrollConfig ? el.ddScrollConfig : dds;\r
+ if(r && r.contains(pt) && el.isScrollable()){\r
+ if(r.bottom - pt.y <= c.vthresh){\r
+ if(proc.el != el){\r
+ startProc(el, "down");\r
+ }\r
+ return;\r
+ }else if(r.right - pt.x <= c.hthresh){\r
+ if(proc.el != el){\r
+ startProc(el, "left");\r
+ }\r
+ return;\r
+ }else if(pt.y - r.top <= c.vthresh){\r
+ if(proc.el != el){\r
+ startProc(el, "up");\r
+ }\r
+ return;\r
+ }else if(pt.x - r.left <= c.hthresh){\r
+ if(proc.el != el){\r
+ startProc(el, "right");\r
+ }\r
+ return;\r
+ }\r
+ }\r
+ }\r
+ clearProc();\r
+ };\r
+ \r
+ ddm.fireEvents = ddm.fireEvents.createSequence(onFire, ddm);\r
+ ddm.stopDrag = ddm.stopDrag.createSequence(onStop, ddm);\r
+ \r
+ return {\r
+ <div id="method-Ext.dd.ScrollManager-register"></div>/**\r
+ * Registers new overflow element(s) to auto scroll\r
+ * @param {Mixed/Array} el The id of or the element to be scrolled or an array of either\r
+ */\r
+ register : function(el){\r
+ if(Ext.isArray(el)){\r
+ for(var i = 0, len = el.length; i < len; i++) {\r
+ this.register(el[i]);\r
+ }\r
+ }else{\r
+ el = Ext.get(el);\r
+ els[el.id] = el;\r
+ }\r
+ },\r
+ \r
+ <div id="method-Ext.dd.ScrollManager-unregister"></div>/**\r
+ * Unregisters overflow element(s) so they are no longer scrolled\r
+ * @param {Mixed/Array} el The id of or the element to be removed or an array of either\r
+ */\r
+ unregister : function(el){\r
+ if(Ext.isArray(el)){\r
+ for(var i = 0, len = el.length; i < len; i++) {\r
+ this.unregister(el[i]);\r
+ }\r
+ }else{\r
+ el = Ext.get(el);\r
+ delete els[el.id];\r
+ }\r
+ },\r
+ \r
+ <div id="prop-Ext.dd.ScrollManager-vthresh"></div>/**\r
+ * The number of pixels from the top or bottom edge of a container the pointer needs to be to\r
+ * trigger scrolling (defaults to 25)\r
+ * @type Number\r
+ */\r
+ vthresh : 25,\r
+ <div id="prop-Ext.dd.ScrollManager-hthresh"></div>/**\r
+ * The number of pixels from the right or left edge of a container the pointer needs to be to\r
+ * trigger scrolling (defaults to 25)\r
+ * @type Number\r
+ */\r
+ hthresh : 25,\r
+\r
+ <div id="prop-Ext.dd.ScrollManager-increment"></div>/**\r
+ * The number of pixels to scroll in each scroll increment (defaults to 50)\r
+ * @type Number\r
+ */\r
+ increment : 100,\r
+ \r
+ <div id="prop-Ext.dd.ScrollManager-frequency"></div>/**\r
+ * The frequency of scrolls in milliseconds (defaults to 500)\r
+ * @type Number\r
+ */\r
+ frequency : 500,\r
+ \r
+ <div id="prop-Ext.dd.ScrollManager-animate"></div>/**\r
+ * True to animate the scroll (defaults to true)\r
+ * @type Boolean\r
+ */\r
+ animate: true,\r
+ \r
+ <div id="prop-Ext.dd.ScrollManager-animDuration"></div>/**\r
+ * The animation duration in seconds - \r
+ * MUST BE less than Ext.dd.ScrollManager.frequency! (defaults to .4)\r
+ * @type Number\r
+ */\r
+ animDuration: .4,\r
+ \r
+ <div id="method-Ext.dd.ScrollManager-refreshCache"></div>/**\r
+ * Manually trigger a cache refresh.\r
+ */\r
+ refreshCache : function(){\r
+ for(var id in els){\r
+ if(typeof els[id] == 'object'){ // for people extending the object prototype\r
+ els[id]._region = els[id].getRegion();\r
+ }\r
+ }\r
+ }\r
+ };\r
+}();</pre> \r
+</body>\r
+</html>
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