First version of the newly restructured repository

frontend/beta/js/YUI-extensions/dd/ScrollManager.js

@@ -0,0 +1,171 @@
+// kill dependency issue
+if(YAHOO.util.DragDrop){
+/**
+ * @class YAHOO.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
+ */
+YAHOO.ext.dd.ScrollManager = function(){
+    var ddm = YAHOO.util.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 = YAHOO.ext.dd.ScrollManager;
+            if(!dds.animate || !YAHOO.util.Scroll){
+                if(proc.el.scroll(proc.dir, dds.increment)){
+                    triggerRefresh();
+                }
+            }else{
+                proc.el.scroll(proc.dir, dds.increment, 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, YAHOO.ext.dd.ScrollManager.frequency);
+    };
+    
+    var onFire = function(e, isDrop){
+        if(isDrop || !ddm.dragCurrent){ return; }
+        var dds = YAHOO.ext.dd.ScrollManager;
+        if(!dragEl || dragEl != ddm.dragCurrent){
+            dragEl = ddm.dragCurrent;
+            // refresh regions on drag start
+            dds.refreshCache();
+        }
+        
+        var xy = YAHOO.util.Event.getXY(e);
+        var pt = new YAHOO.util.Point(xy[0], xy[1]);
+        for(var id in els){
+            var el = els[id], r = el._region;
+            if(r.contains(pt) && el.isScrollable()){
+                if(r.bottom - pt.y <= dds.thresh){
+                    if(proc.el != el){
+                        startProc(el, 'down');
+                    }
+                    return;
+                }else if(r.right - pt.x <= dds.thresh){
+                    if(proc.el != el){
+                        startProc(el, 'left');
+                    }
+                    return;
+                }else if(pt.y - r.top <= dds.thresh){
+                    if(proc.el != el){
+                        startProc(el, 'up');
+                    }
+                    return;
+                }else if(pt.x - r.left <= dds.thresh){
+                    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 {String/HTMLElement/Element/Array} el The id of or the element to be scrolled or an array of either
+         */
+        register : function(el){
+            if(el instanceof Array){
+                for(var i = 0, len = el.length; i < len; i++) {
+                	this.register(el[i]);
+                }
+            }else{
+                el = getEl(el);
+                els[el.id] = el;
+            }
+        },
+        
+        /**
+         * Unregisters overflow element(s) so they are no longer scrolled
+         * @param {String/HTMLElement/Element/Array} el The id of or the element to be removed or an array of either
+         */
+        unregister : function(el){
+            if(el instanceof Array){
+                for(var i = 0, len = el.length; i < len; i++) {
+                	this.unregister(el[i]);
+                }
+            }else{
+                el = getEl(el);
+                delete els[el.id];
+            }
+        },
+        
+        /**
+         * The number of pixels from the edge of a container the pointer needs to be to 
+         * trigger scrolling (defaults to 25)
+         * @type Number
+         */
+        thresh : 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 YAHOO.ext.dd.ScrollManager.frequency! (defaults to .4)
+         * @type Number
+         */
+        animDuration: .4,
+        
+        /**
+         * Manually trigger a cache refresh.
+         */
+        refreshCache : function(){
+            for(var id in els){
+                els[id]._region = els[id].getRegion();
+            }
+        }
+    } 
+}();
+}