添加项目文件。

Live-Charts-master/Core/SeriesAlgorithms/StepLineAlgorithm.cs

@@ -0,0 +1,101 @@
+//The MIT License(MIT)
+
+//Copyright(c) 2016 Alberto Rodriguez & LiveCharts Contributors
+
+//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.
+
+using LiveCharts.Defaults;
+using LiveCharts.Definitions.Points;
+using LiveCharts.Definitions.Series;
+using LiveCharts.Dtos;
+
+namespace LiveCharts.SeriesAlgorithms
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <seealso cref="LiveCharts.SeriesAlgorithm" />
+    /// <seealso cref="LiveCharts.Definitions.Series.ICartesianSeries" />
+    public class StepLineAlgorithm : SeriesAlgorithm, ICartesianSeries
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StepLineAlgorithm"/> class.
+        /// </summary>
+        /// <param name="view">The view.</param>
+        public StepLineAlgorithm(ISeriesView view) : base(view)
+        {
+            SeriesOrientation = SeriesOrientation.Horizontal;
+            PreferredSelectionMode = TooltipSelectionMode.SharedXValues;
+        }
+
+        /// <summary>
+        /// Updates this instance.
+        /// </summary>
+        public override void Update()
+        {
+            ChartPoint previous = null;
+
+            var i = 0;
+            foreach (var current in View.ActualValues.GetPoints(View))
+            {
+                current.View = View.GetPointView(current,
+                    View.DataLabels ? View.GetLabelPointFormatter()(current) : null);
+
+                current.SeriesView = View;
+
+                var stepView = (IStepPointView) current.View;
+
+                current.ChartLocation = new CorePoint(
+                    ChartFunctions.ToDrawMargin(current.X, AxisOrientation.X, Chart, View.ScalesXAt),
+                    ChartFunctions.ToDrawMargin(current.Y, AxisOrientation.Y, Chart, View.ScalesYAt));
+
+                if (previous != null)
+                {
+                    stepView.DeltaX = current.ChartLocation.X - previous.ChartLocation.X;
+                    stepView.DeltaY = current.ChartLocation.Y - previous.ChartLocation.Y;
+                }
+
+                current.View.DrawOrMove(previous, current, i, Chart);
+
+                i++;
+                previous = current;
+            }
+        }
+
+        double ICartesianSeries.GetMinX(AxisCore axis)
+        {
+            return AxisLimits.StretchMin(axis);
+        }
+
+        double ICartesianSeries.GetMaxX(AxisCore axis)
+        {
+            return AxisLimits.StretchMax(axis);
+        }
+
+        double ICartesianSeries.GetMinY(AxisCore axis)
+        {
+            return AxisLimits.SeparatorMin(axis);
+        }
+
+        double ICartesianSeries.GetMaxY(AxisCore axis)
+        {
+            return AxisLimits.SeparatorMaxRounded(axis);
+        }
+    }
+}