171 lines
No EOL
6 KiB
HTML
171 lines
No EOL
6 KiB
HTML
<html><head><title>ScrollManager.js</title><link rel="stylesheet" type="text/css" href="../resources/style.css" media="screen"/></head><body><h1>ScrollManager.js</h1><pre class="highlighted"><code><i>/**
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* @class Ext.dd.ScrollManager
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* Provides automatic scrolling of overflow regions <b>in</b> the page during drag operations.<br><br>
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* <b>Note: This class uses "Point Mode" and is untested <b>in</b> "Intersect Mode".</b>
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* @singleton
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*/</i>
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Ext.dd.ScrollManager = <b>function</b>(){
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<b>var</b> ddm = Ext.dd.DragDropMgr;
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<b>var</b> els = {};
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<b>var</b> dragEl = null;
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<b>var</b> proc = {};
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<b>var</b> onStop = <b>function</b>(e){
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dragEl = null;
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clearProc();
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};
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<b>var</b> triggerRefresh = <b>function</b>(){
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<b>if</b>(ddm.dragCurrent){
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ddm.refreshCache(ddm.dragCurrent.groups);
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}
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};
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<b>var</b> doScroll = <b>function</b>(){
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<b>if</b>(ddm.dragCurrent){
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<b>var</b> dds = Ext.dd.ScrollManager;
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<b>if</b>(!dds.animate){
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<b>if</b>(proc.el.scroll(proc.dir, dds.increment)){
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triggerRefresh();
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}
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}<b>else</b>{
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proc.el.scroll(proc.dir, dds.increment, true, dds.animDuration, triggerRefresh);
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}
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}
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};
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<b>var</b> clearProc = <b>function</b>(){
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<b>if</b>(proc.id){
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clearInterval(proc.id);
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}
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proc.id = 0;
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proc.el = null;
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proc.dir = "";
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};
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<b>var</b> startProc = <b>function</b>(el, dir){
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clearProc();
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proc.el = el;
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proc.dir = dir;
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proc.id = setInterval(doScroll, Ext.dd.ScrollManager.frequency);
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};
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<b>var</b> onFire = <b>function</b>(e, isDrop){
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<b>if</b>(isDrop || !ddm.dragCurrent){ <b>return</b>; }
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<b>var</b> dds = Ext.dd.ScrollManager;
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<b>if</b>(!dragEl || dragEl != ddm.dragCurrent){
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dragEl = ddm.dragCurrent;
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<i>// refresh regions on drag start</i>
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dds.refreshCache();
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}
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<b>var</b> xy = Ext.lib.Event.getXY(e);
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<b>var</b> pt = <b>new</b> Ext.lib.Point(xy[0], xy[1]);
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<b>for</b>(var id <b>in</b> els){
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<b>var</b> el = els[id], r = el._region;
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<b>if</b>(r.contains(pt) && el.isScrollable()){
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<b>if</b>(r.bottom - pt.y <= dds.thresh){
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<b>if</b>(proc.el != el){
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startProc(el, "down");
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}
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<b>return</b>;
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}<b>else</b> if(r.right - pt.x <= dds.thresh){
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<b>if</b>(proc.el != el){
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startProc(el, "left");
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}
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<b>return</b>;
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}<b>else</b> if(pt.y - r.top <= dds.thresh){
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<b>if</b>(proc.el != el){
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startProc(el, "up");
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}
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<b>return</b>;
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}<b>else</b> if(pt.x - r.left <= dds.thresh){
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<b>if</b>(proc.el != el){
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startProc(el, "right");
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}
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<b>return</b>;
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}
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}
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}
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clearProc();
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};
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ddm.fireEvents = ddm.fireEvents.createSequence(onFire, ddm);
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ddm.stopDrag = ddm.stopDrag.createSequence(onStop, ddm);
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<b>return</b> {
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<i>/**
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* Registers <b>new</b> overflow element(s) to auto scroll
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* @param {String/HTMLElement/Element/Array} el The id of or the element to be scrolled or an array of either
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*/</i>
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register : <b>function</b>(el){
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<b>if</b>(el instanceof Array){
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<b>for</b>(var i = 0, len = el.length; i < len; i++) {
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<b>this</b>.register(el[i]);
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}
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}<b>else</b>{
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el = Ext.get(el);
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els[el.id] = el;
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}
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},
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<i>/**
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* Unregisters overflow element(s) so they are no longer scrolled
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* @param {String/HTMLElement/Element/Array} el The id of or the element to be removed or an array of either
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*/</i>
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unregister : <b>function</b>(el){
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<b>if</b>(el instanceof Array){
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<b>for</b>(var i = 0, len = el.length; i < len; i++) {
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<b>this</b>.unregister(el[i]);
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}
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}<b>else</b>{
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el = Ext.get(el);
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<b>delete</b> els[el.id];
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}
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},
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<i>/**
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* The number of pixels from the edge of a container the pointer needs to be to
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* trigger scrolling (defaults to 25)
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* @type Number
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*/</i>
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thresh : 25,
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<i>/**
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* The number of pixels to scroll <b>in</b> each scroll increment (defaults to 50)
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* @type Number
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*/</i>
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increment : 100,
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<i>/**
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* The frequency of scrolls <b>in</b> milliseconds (defaults to 500)
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* @type Number
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*/</i>
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frequency : 500,
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<i>/**
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* True to animate the scroll (defaults to true)
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* @type Boolean
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*/</i>
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animate: true,
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<i>/**
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* The animation duration <b>in</b> seconds -
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* MUST BE less than Ext.dd.ScrollManager.frequency! (defaults to .4)
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* @type Number
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*/</i>
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animDuration: .4,
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<i>/**
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* Manually trigger a cache refresh.
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*/</i>
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refreshCache : <b>function</b>(){
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<b>for</b>(var id <b>in</b> els){
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<b>if</b>(typeof els[id] == 'object'){ <i>// <b>for</b> people extending the object prototype</i>
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els[id]._region = els[id].getRegion();
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}
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}
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}
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};
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}();</code></pre><hr><div style="font-size:10px;text-align:center;color:gray;">Ext - Copyright © 2006-2007 Ext JS, LLC<br />All rights reserved.</div>
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</body></html> |