--- /dev/null
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+<head>
+ <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+ <title>The source code</title>
+ <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
+ <script type="text/javascript" src="../resources/prettify/prettify.js"></script>
+</head>
+<body onload="prettyPrint();">
+ <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
+ */
+<div id="cls-Ext.dd.ScrollManager"></div>/**
+ * @class Ext.dd.ScrollManager
+ * <p>Provides automatic scrolling of overflow regions in the page during drag operations.</p>
+ * <p>The ScrollManager configs will be used as the defaults for any scroll container registered with it,
+ * but you can also override most of the configs per scroll container by adding a
+ * <tt>ddScrollConfig</tt> object to the target element that contains these properties: {@link #hthresh},
+ * {@link #vthresh}, {@link #increment} and {@link #frequency}. Example usage:
+ * <pre><code>
+var el = Ext.get('scroll-ct');
+el.ddScrollConfig = {
+ vthresh: 50,
+ hthresh: -1,
+ frequency: 100,
+ increment: 200
+};
+Ext.dd.ScrollManager.register(el);
+</code></pre>
+ * <b>Note: This class uses "Point Mode" and is untested in "Intersect Mode".</b>
+ * @singleton
+ */
+Ext.dd.ScrollManager = function() {
+ var ddm = Ext.dd.DragDropMgr,
+ els = {},
+ dragEl = null,
+ proc = {},
+ onStop = function(e) {
+ dragEl = null;
+ clearProc();
+ },
+ triggerRefresh = function() {
+ if (ddm.dragCurrent) {
+ ddm.refreshCache(ddm.dragCurrent.groups);
+ }
+ },
+ doScroll = function() {
+ if (ddm.dragCurrent) {
+ var dds = Ext.dd.ScrollManager,
+ inc = proc.el.ddScrollConfig ? proc.el.ddScrollConfig.increment: dds.increment;
+ if (!dds.animate) {
+ if (proc.el.scroll(proc.dir, inc)) {
+ triggerRefresh();
+ }
+ } else {
+ proc.el.scroll(proc.dir, inc, true, dds.animDuration, triggerRefresh);
+ }
+ }
+ },
+ clearProc = function() {
+ if (proc.id) {
+ clearInterval(proc.id);
+ }
+ proc.id = 0;
+ proc.el = null;
+ proc.dir = "";
+ },
+ startProc = function(el, dir) {
+ clearProc();
+ proc.el = el;
+ proc.dir = dir;
+ var freq = (el.ddScrollConfig && el.ddScrollConfig.frequency) ?
+ el.ddScrollConfig.frequency: Ext.dd.ScrollManager.frequency,
+ group = el.ddScrollConfig ? el.ddScrollConfig.ddGroup: undefined;
+
+ if (group === undefined || ddm.dragCurrent.ddGroup == group) {
+ proc.id = setInterval(doScroll, freq);
+ }
+ },
+ onFire = function(e, isDrop) {
+ if (isDrop || !ddm.dragCurrent) {
+ return;
+ }
+ var dds = Ext.dd.ScrollManager;
+ if (!dragEl || dragEl != ddm.dragCurrent) {
+ dragEl = ddm.dragCurrent;
+ // refresh regions on drag start
+ dds.refreshCache();
+ }
+
+ var xy = Ext.lib.Event.getXY(e),
+ pt = new Ext.lib.Point(xy[0], xy[1]),
+ id,
+ el,
+ r,
+ c;
+ for (id in els) {
+ if (els.hasOwnProperty(id)) {
+ el = els[id];
+ r = el._region;
+ c = el.ddScrollConfig ? el.ddScrollConfig: dds;
+ if (r && r.contains(pt) && el.isScrollable()) {
+ if (r.bottom - pt.y <= c.vthresh) {
+ if (proc.el != el) {
+ startProc(el, "down");
+ }
+ return;
+ } else if (r.right - pt.x <= c.hthresh) {
+ if (proc.el != el) {
+ startProc(el, "left");
+ }
+ return;
+ } else if (pt.y - r.top <= c.vthresh) {
+ if (proc.el != el) {
+ startProc(el, "up");
+ }
+ return;
+ } else if (pt.x - r.left <= c.hthresh) {
+ if (proc.el != el) {
+ startProc(el, "right");
+ }
+ return;
+ }
+ }
+ }
+ }
+ clearProc();
+ };
+
+ ddm.fireEvents = ddm.fireEvents.createSequence(onFire, ddm);
+ ddm.stopDrag = ddm.stopDrag.createSequence(onStop, ddm);
+
+ return {
+ <div id="method-Ext.dd.ScrollManager-register"></div>/**
+ * Registers new overflow element(s) to auto scroll
+ * @param {Mixed/Array} el The id of or the element to be scrolled or an array of either
+ */
+ register: function(el) {
+ if (Ext.isArray(el)) {
+ var i = 0,
+ len = el.length;
+ for (; i < len; i++) {
+ this.register(el[i]);
+ }
+ } else {
+ el = Ext.get(el);
+ els[el.id] = el;
+ }
+ },
+
+ <div id="method-Ext.dd.ScrollManager-unregister"></div>/**
+ * Unregisters overflow element(s) so they are no longer scrolled
+ * @param {Mixed/Array} el The id of or the element to be removed or an array of either
+ */
+ unregister: function(el) {
+ if (Ext.isArray(el)) {
+ var i = 0,
+ len = el.length;
+ for (; i < len; i++) {
+ this.unregister(el[i]);
+ }
+ } else {
+ el = Ext.get(el);
+ delete els[el.id];
+ }
+ },
+
+ <div id="prop-Ext.dd.ScrollManager-vthresh"></div>/**
+ * The number of pixels from the top or bottom edge of a container the pointer needs to be to
+ * trigger scrolling (defaults to 25)
+ * @type Number
+ */
+ vthresh: 25,
+ <div id="prop-Ext.dd.ScrollManager-hthresh"></div>/**
+ * The number of pixels from the right or left edge of a container the pointer needs to be to
+ * trigger scrolling (defaults to 25)
+ * @type Number
+ */
+ hthresh: 25,
+
+ <div id="prop-Ext.dd.ScrollManager-increment"></div>/**
+ * The number of pixels to scroll in each scroll increment (defaults to 50)
+ * @type Number
+ */
+ increment: 100,
+
+ <div id="prop-Ext.dd.ScrollManager-frequency"></div>/**
+ * The frequency of scrolls in milliseconds (defaults to 500)
+ * @type Number
+ */
+ frequency: 500,
+
+ <div id="prop-Ext.dd.ScrollManager-animate"></div>/**
+ * True to animate the scroll (defaults to true)
+ * @type Boolean
+ */
+ animate: true,
+
+ <div id="prop-Ext.dd.ScrollManager-animDuration"></div>/**
+ * The animation duration in seconds -
+ * MUST BE less than Ext.dd.ScrollManager.frequency! (defaults to .4)
+ * @type Number
+ */
+ animDuration: 0.4,
+
+ <div id="method-Ext.dd.ScrollManager-refreshCache"></div>/**
+ * Manually trigger a cache refresh.
+ */
+ refreshCache: function() {
+ var id;
+ for (id in els) {
+ if (els.hasOwnProperty(id)) {
+ if (typeof els[id] == 'object') {
+ // for people extending the object prototype
+ els[id]._region = els[id].getRegion();
+ }
+ }
+ }
+ }
+ };
+}();</pre>
+</body>
+</html>
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