// --------------------------------------------------------------------------------------------------------------------
// <copyright file="TextAnnotationExamples.cs" company="OxyPlot">
// Copyright (c) 2014 OxyPlot contributors
// </copyright>
// --------------------------------------------------------------------------------------------------------------------

namespace ExampleLibrary
{
 using System;
 using System.Linq;

 using OxyPlot;
 using OxyPlot.Annotations;
 using OxyPlot.Axes;

 [Examples("TextAnnotation"), Tags("Annotations")]
 public static class TextAnnotationExamples
 {
 [Example("TextAnnotation")]
 public static PlotModel TextAnnotations()
 {
 var model = new PlotModel { Title = "TextAnnotation" };
 model.Axes.Add(new LinearAxis { Position = AxisPosition.Bottom, Minimum = -15, Maximum = 25 });
 model.Axes.Add(new LinearAxis { Position = AxisPosition.Left, Minimum = -5, Maximum = 18 });
 model.Annotations.Add(new TextAnnotation { TextPosition = new DataPoint(-6, 0), Text = "Text annotation 1" });
 model.Annotations.Add(new TextAnnotation { TextPosition = new DataPoint(-7, 10), TextRotation = 80, Text = "Text annotation 2" });
 model.Annotations.Add(new TextAnnotation { TextPosition = new DataPoint(2, 2), TextRotation = 20, TextHorizontalAlignment = HorizontalAlignment.Right, TextVerticalAlignment = VerticalAlignment.Top, Text = "Right/Top" });
 model.Annotations.Add(new TextAnnotation { TextPosition = new DataPoint(2, 4), TextRotation = 20, TextHorizontalAlignment = HorizontalAlignment.Right, TextVerticalAlignment = VerticalAlignment.Middle, Text = "Right/Middle" });
 model.Annotations.Add(new TextAnnotation { TextPosition = new DataPoint(2, 6), TextRotation = 20, TextHorizontalAlignment = HorizontalAlignment.Right, TextVerticalAlignment = VerticalAlignment.Bottom, Text = "Right/Bottom" });
 model.Annotations.Add(new TextAnnotation { TextPosition = new DataPoint(10, 2), TextRotation = 20, TextHorizontalAlignment = HorizontalAlignment.Center, TextVerticalAlignment = VerticalAlignment.Top, Text = "Center/Top" });
 model.Annotations.Add(new TextAnnotation { TextPosition = new DataPoint(10, 4), TextRotation = 20, TextHorizontalAlignment = HorizontalAlignment.Center, TextVerticalAlignment = VerticalAlignment.Middle, Text = "Center/Middle" });
 model.Annotations.Add(new TextAnnotation { TextPosition = new DataPoint(10, 6), TextRotation = 20, TextHorizontalAlignment = HorizontalAlignment.Center, TextVerticalAlignment = VerticalAlignment.Bottom, Text = "Center/Bottom" });
 model.Annotations.Add(new TextAnnotation { TextPosition = new DataPoint(18, 2), TextRotation = 20, TextHorizontalAlignment = HorizontalAlignment.Left, TextVerticalAlignment = VerticalAlignment.Top, Text = "Left/Top" });
 model.Annotations.Add(new TextAnnotation { TextPosition = new DataPoint(18, 4), TextRotation = 20, TextHorizontalAlignment = HorizontalAlignment.Left, TextVerticalAlignment = VerticalAlignment.Middle, Text = "Left/Middle" });
 model.Annotations.Add(new TextAnnotation { TextPosition = new DataPoint(18, 6), TextRotation = 20, TextHorizontalAlignment = HorizontalAlignment.Left, TextVerticalAlignment = VerticalAlignment.Bottom, Text = "Left/Bottom" });

 double d = 0.05;

 Action<double, double> addPoint = (x, y) =>
 {
 var annotation = new PolygonAnnotation
 {
 Layer = AnnotationLayer.BelowAxes,
 };
 annotation.Points.AddRange(new[]
 {
 new DataPoint(x - d, y - d), new DataPoint(x + d, y - d), new DataPoint(x + d, y + d),
 new DataPoint(x - d, y + d), new DataPoint(x - d, y - d)
 });
 model.Annotations.Add(annotation);
 };

 foreach (var a in model.Annotations.ToArray())
 {
 var ta = a as TextAnnotation;
 if (ta != null)
 {
 addPoint(ta.TextPosition.X, ta.TextPosition.Y);
 }
 }

 return model;
 }
 }
}