randomize starting color

Charts/Charts/Chart.cs

@@ -53,6 +53,8 @@ public abstract class Chart : UserControl
         public List<HoverableShape> HoverableShapes = new List<HoverableShape>(); 
         private Point _panOrigin;
         private bool _isDragging;
+        public int ColorStartIndex = 0;
+        private static Random _randomizer;
 
         //these timers are to avoid multiple graph ploting, graph will only plot when timer ticks.
         private readonly DispatcherTimer _resizeTimer;
@@ -77,6 +79,7 @@ static Chart()
                 Color.FromRgb(210,84,0),
                 Color.FromRgb(191,57,43)
             };
+            _randomizer = new Random();
         }
 
         protected Chart()
@@ -111,12 +114,23 @@ protected Chart()
             _seriesCangedTimer.Tick += UpdateModifiedDataSeries;
 
             CurrentScale = 1;
+            if (RandomizeStartingColor)
+            {
+                ColorStartIndex = _randomizer.Next(0, Colors.Count - 1);
+            }
         }
 
         abstract protected void Scale();
         abstract protected bool ScaleChanged { get; }
 
+        /// <summary>
+        /// List of Colors series will use, yu can change this list to your own colors.
+        /// </summary>
         public static List<Color> Colors { get; set; }
+        /// <summary>
+        /// indicates wether each instance of chart you create needs to randomize starting color
+        /// </summary>
+        public static bool RandomizeStartingColor { get; set; }
 
         public static readonly DependencyProperty ZoomingProperty = DependencyProperty.Register(
             "Zooming", typeof(bool), typeof(Chart));

Charts/Series/Serie.cs

@@ -36,6 +36,7 @@ public abstract class Serie
         private Color? _color;
         protected List<Shape> Shapes = new List<Shape>();
         private Chart _chart;
+        private int _colorId;
 
         protected Serie()
         {
@@ -70,9 +71,13 @@ public Chart Chart
             }
         }
 
-        public int ColorId { get; set; }
         public double StrokeThickness { get; set; }
         public double PointRadius { get; set; }
+        public int ColorId
+        {
+            get { return _colorId + Chart.ColorStartIndex; }
+            set { _colorId = value; }
+        }
         public Color Color
         {
             get

Charts/ShapeHoverBehavior.cs

@@ -0,0 +1,29 @@
+//The MIT License(MIT)
+
+//Copyright(c) 2015 Alberto Rodriguez
+
+//Permission is hereby granted, free of charge, to any person obtaining a copy
+//of this software and associated documentation files (the "Software"), to deal
+//in the Software without restriction, including without limitation the rights
+//to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//copies of the Software, and to permit persons to whom the Software is
+//furnished to do so, subject to the following conditions:
+
+//The above copyright notice and this permission notice shall be included in all
+//copies or substantial portions of the Software.
+
+//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//SOFTWARE.
+
+namespace Charts
+{
+    public enum ShapeHoverBehavior
+    {
+        Dot, Shape
+    }
+}