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| 0,0 → 1,187 |
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| /* |
| * Ext JS Library 2.0.2 |
| * Copyright(c) 2006-2008, Ext JS, LLC. |
| * licensing@extjs.com |
| * |
| * http://extjs.com/license |
| */ |
| |
| /** |
| * @class Ext.dd.ScrollManager |
| * Provides automatic scrolling of overflow regions in the page during drag operations.<br><br> |
| * <b>Note: This class uses "Point Mode" and is untested in "Intersect Mode".</b> |
| * @singleton |
| */ |
| Ext.dd.ScrollManager = function(){ |
| var ddm = Ext.dd.DragDropMgr; |
| var els = {}; |
| var dragEl = null; |
| var proc = {}; |
| |
| var onStop = function(e){ |
| dragEl = null; |
| clearProc(); |
| }; |
| |
| var triggerRefresh = function(){ |
| if(ddm.dragCurrent){ |
| ddm.refreshCache(ddm.dragCurrent.groups); |
| } |
| }; |
| |
| var doScroll = function(){ |
| if(ddm.dragCurrent){ |
| var dds = Ext.dd.ScrollManager; |
| var 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); |
| } |
| } |
| }; |
| |
| var clearProc = function(){ |
| if(proc.id){ |
| clearInterval(proc.id); |
| } |
| proc.id = 0; |
| proc.el = null; |
| proc.dir = ""; |
| }; |
| |
| var startProc = function(el, dir){ |
| clearProc(); |
| proc.el = el; |
| proc.dir = dir; |
| proc.id = setInterval(doScroll, Ext.dd.ScrollManager.frequency); |
| }; |
| |
| var 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); |
| var pt = new Ext.lib.Point(xy[0], xy[1]); |
| for(var id in els){ |
| var el = els[id], r = el._region; |
| var 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 { |
| /** |
| * 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)){ |
| for(var i = 0, len = el.length; i < len; i++) { |
| this.register(el[i]); |
| } |
| }else{ |
| el = Ext.get(el); |
| els[el.id] = el; |
| } |
| }, |
| |
| /** |
| * 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)){ |
| for(var i = 0, len = el.length; i < len; i++) { |
| this.unregister(el[i]); |
| } |
| }else{ |
| el = Ext.get(el); |
| delete els[el.id]; |
| } |
| }, |
| |
| /** |
| * 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, |
| /** |
| * 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, |
| |
| /** |
| * The number of pixels to scroll in each scroll increment (defaults to 50) |
| * @type Number |
| */ |
| increment : 100, |
| |
| /** |
| * The frequency of scrolls in milliseconds (defaults to 500) |
| * @type Number |
| */ |
| frequency : 500, |
| |
| /** |
| * True to animate the scroll (defaults to true) |
| * @type Boolean |
| */ |
| animate: true, |
| |
| /** |
| * The animation duration in seconds - |
| * MUST BE less than Ext.dd.ScrollManager.frequency! (defaults to .4) |
| * @type Number |
| */ |
| animDuration: .4, |
| |
| /** |
| * Manually trigger a cache refresh. |
| */ |
| refreshCache : function(){ |
| for(var id in els){ |
| if(typeof els[id] == 'object'){ // for people extending the object prototype |
| els[id]._region = els[id].getRegion(); |
| } |
| } |
| } |
| }; |
| }(); |