Fixed weighted average (#21 #22)

Now the completion of a task is the average of its subtasks weighted by the duration of each one.

In addition to changing the logo as requested, the NumKid property was kept and the vWeight parameter was added to be used for the weighted average.

jsgantt.js

@@ -1,11 +1,11 @@
 /*
-	   _   ___  _____   _  _____ ____   ____
-	  (_) / _ \ \_   \ / ||___  | ___| |___ \
-	  | |/ /_\/  / /\/ | |   / /|___ \   __) |
-	  | / /_\\/\/ /_   | |_ / /_ ___) | / __/
-	 _/ \____/\____/   |_(_)_/(_)____(_)_____|
-	|__/
-	jsGanttImproved 1.7.5.2
+	   _        ___            _   _    _____                                        _
+	  (_)___   / _ \__ _ _ __ | |_| |_  \_   \_ __ ___  _ __  _ __ _____   _____  __| |
+	  | / __| / /_\/ _` | '_ \| __| __|  / /\/ '_ ` _ \| '_ \| '__/ _ \ \ / / _ \/ _` |
+	  | \__ \/ /_\\ (_| | | | | |_| |_/\/ /_ | | | | | | |_) | | | (_) \ V /  __/ (_| |
+	 _/ |___/\____/\__,_|_| |_|\__|\__\____/ |_| |_| |_| .__/|_|  \___/ \_/ \___|\__,_|
+	|__/                                               |_|
+	jsGanttImproved 1.7.5.3
 
 	The current version of this code can be found at https://github.com/jsGanttImproved/jsgantt-improved/
 
@@ -100,6 +100,7 @@ JSGantt.TaskItem=function(pID, pName, pStart, pEnd, pClass, pLink, pMile, pRes,
 	var vDuration='';
 	var vLevel=0;
 	var vNumKid=0;
+	var vWeight=0;
 	var vVisible=1;
 	var vSortIdx=0;
 	var vToDelete=false;
@@ -230,6 +231,7 @@ JSGantt.TaskItem=function(pID, pName, pStart, pEnd, pClass, pLink, pMile, pRes,
 	this.getOpen=function(){return vOpen;};
 	this.getLevel=function(){return vLevel;};
 	this.getNumKids=function(){return vNumKid;};
+	this.getWeight=function(){return vWeight;};
 	this.getStartX=function(){return x1;};
 	this.getStartY=function(){return y1;};
 	this.getEndX=function(){return x2;};
@@ -248,6 +250,7 @@ JSGantt.TaskItem=function(pID, pName, pStart, pEnd, pClass, pLink, pMile, pRes,
 	this.setGroupMinEnd=function(pEnd){if(pEnd instanceof Date)vGroupMinEnd=pEnd;};
 	this.setLevel=function(pLevel){vLevel=parseInt(document.createTextNode(pLevel).data);};
 	this.setNumKid=function(pNumKid){vNumKid=parseInt(document.createTextNode(pNumKid).data);};
+	this.setWeight=function(pWeight){vWeight=parseInt(document.createTextNode(pWeight).data);};
 	this.setCompVal=function(pCompVal){vComp=parseFloat(document.createTextNode(pCompVal).data);};
 	this.setStartX=function(pX){x1=parseInt(document.createTextNode(pX).data);};
 	this.setStartY=function(pY){y1=parseInt(document.createTextNode(pY).data);};
@@ -1707,6 +1710,7 @@ JSGantt.processRows=function(pList, pID, pRow, pLevel, pOpen, pUseSort)
 	var vMinSet=0;
 	var vMaxSet=0;
 	var vNumKid=0;
+	var vWeight=0;
 	var vLevel=pLevel;
 	var vList=pList;
 	var vComb=false;
@@ -1739,7 +1743,6 @@ JSGantt.processRows=function(pList, pID, pRow, pLevel, pOpen, pUseSort)
 			}
 
 			pList[i].setLevel(vLevel);
-			vNumKid++;
 
 			if(pList[i].getGroup())
 			{
@@ -1759,7 +1762,9 @@ JSGantt.processRows=function(pList, pID, pRow, pLevel, pOpen, pUseSort)
 				vMaxSet=1;
 			}
 
-			vCompSum+=pList[i].getCompVal();
+			vNumKid++;
+			vWeight+=pList[i].getEnd()-pList[i].getStart()+1;
+			vCompSum+=pList[i].getCompVal()*(pList[i].getEnd()-pList[i].getStart()+1);
 			pList[i].setSortIdx(i*pList.length);
 		}
 	}
@@ -1778,7 +1783,8 @@ JSGantt.processRows=function(pList, pID, pRow, pLevel, pOpen, pUseSort)
 		pList[pRow].setStart(vMinDate);
 		pList[pRow].setEnd(vMaxDate);
 		pList[pRow].setNumKid(vNumKid);
-		pList[pRow].setCompVal(Math.ceil(vCompSum/vNumKid));
+		pList[pRow].setWeight(vWeight);
+		pList[pRow].setCompVal(Math.ceil(vCompSum/vWeight));
 	}
 
 	if (pID==0 && pUseSort==1)