Integrate XDDFChart into XSSFDrawing

OpenXmlFormats/Drawing/Chart/BarChart.cs

@@ -41,6 +41,7 @@ public class CT_BarChart
 
         public CT_BarChart()
         {
+            groupingField = new CT_BarGrouping();
         }
         public static CT_BarChart Parse(XmlNode node, XmlNamespaceManager namespaceManager)
         {
@@ -301,6 +302,8 @@ public CT_BarDir AddNewBarDir()
 
         public int SizeOfAxIdArray()
         {
+            if(axIdField==null)
+                return 0;
             return axIdField.Count;
         }
 

OpenXmlFormats/Drawing/Chart/Chart.cs

@@ -103,7 +103,10 @@ public static CT_ChartSpace Parse(XmlNode node, XmlNamespaceManager namespaceMan
         }
 
 
-
+        public void Save(Stream stream)
+        {
+            this.Write(stream);
+        }
         internal void Write(Stream stream)
         {
             using (StreamWriter sw = new StreamWriter(stream))
@@ -1751,7 +1754,7 @@ public CT_Layout AddNewLayout()
         }
         public bool IsSetLegendPos()
         {
-            return legendPosSpecifiedField;
+            return this.legendPos!=null;
         }
         public CT_LegendPos AddNewLegendPos()
         {
@@ -3876,6 +3879,17 @@ public CT_TextBody AddNewRich()
             this.richField = new CT_TextBody();
             return this.richField;
         }
+
+        public void UnsetRich()
+        {
+            this.richField=null;
+        }
+
+        public CT_StrRef AddNewStrRef()
+        {
+            this.strRefField = new CT_StrRef();
+            return this.strRefField;
+        }
     }
 
 
@@ -4126,7 +4140,7 @@ public void SetPtArray(object value)
         {
             if(value== null)
             {
-                this.pt.Clear();
+                this.pt?.Clear();
                 this.ptCountField = null;
             }
             else
@@ -9418,7 +9432,7 @@ public void SetPtArray(object value)
         {
             if(value== null)
             {
-                this.pt.Clear();
+                this.pt?.Clear();
                 this.ptCountField = null;
             }
             else
@@ -11172,7 +11186,7 @@ public List<CT_SerAx> serAx
                 return this.serAxField;
             }
             set
-            {
+            { 
                 this.serAxField = value;
             }
         }
@@ -11292,21 +11306,29 @@ public CT_DateAx AddNewDateAx()
 
         public int SizeOfValAxArray()
         {
+            if(this.valAxField==null)
+                return 0;
             return this.valAxField.Count;
         }
 
         public int SizeOfCatAxArray()
         {
+            if(this.catAxField==null)
+                return 0;
             return this.catAxField.Count;
         }
 
         public int SizeOfDateAxArray()
         {
+            if(this.dateAxField==null)
+                return 0;
             return this.dateAxField.Count;
         }
 
         public int SizeOfSerAxArray()
         {
+            if(this.serAxField==null)
+                return 0;
             return this.serAxField.Count;
         }
 
@@ -12198,6 +12220,11 @@ public void Set(CT_Chart other)
             this.view3DField = other.view3DField;
         }
 
+        public void UnsetTitle()
+        {
+            this.titleField=null;
+        }
+
         [XmlElement(Order = 0)]
         public CT_Title title
         {

OpenXmlFormats/Drawing/Chart/LineChart.cs

@@ -1268,6 +1268,8 @@ public bool IsSetVaryColors()
 
         public int SizeOfAxIdArray()
         {
+            if(this.axIdField==null)
+                return 0;
             return this.axIdField.Count;
         }
 

OpenXmlFormats/Drawing/Chart/ScatterChart.cs

@@ -606,6 +606,8 @@ public CT_Boolean AddNewVaryColors()
 
         public int SizeOfAxIdArray()
         {
+            if(this.axIdField==null)
+                return 0;
             return this.axIdField.Count;
         }
 

main/HSSF/UserModel/HSSFPatriarch.cs

@@ -540,11 +540,6 @@ public IClientAnchor CreateAnchor(int dx1, int dy1, int dx2, int dy2, int col1,
         {
             return new HSSFClientAnchor(dx1, dy1, dx2, dy2, (short)col1, row1, (short)col2, row2);
         }
-
-        public IChart CreateChart(IClientAnchor anchor)
-        {
-            throw new RuntimeException("NotImplemented");
-        }
         /**
      * create shape tree from existing escher records tree
      */