Initial Commit

Charts/Axes/DateTime/DateTimeAxis.cs

@@ -0,0 +1,113 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Microsoft.Research.DynamicDataDisplay.ViewportRestrictions;
+using System.Windows.Media;
+using System.Windows;
+using System.Windows.Data;
+
+namespace Microsoft.Research.DynamicDataDisplay.Charts
+{
+    /// <summary>
+    /// Represents an axis with ticks of <see cref="System.DateTime"/> type.
+    /// </summary>
+    public class DateTimeAxis : AxisBase<DateTime>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="DateTimeAxis"/> class.
+        /// </summary>
+        public DateTimeAxis()
+            : base(new DateTimeAxisControl(), DoubleToDate,
+                dt => dt.Ticks / 10000000000.0)
+        {
+            AxisControl.SetBinding(MajorLabelBackgroundBrushProperty, new Binding("MajorLabelBackgroundBrush") { Source = this });
+            AxisControl.SetBinding(MajorLabelRectangleBorderPropertyProperty, new Binding("MajorLabelRectangleBorderProperty") { Source = this });
+        }
+
+        #region VisualProperties
+
+        /// <summary>
+        /// Gets or sets the major tick labels' background brush. This is a DependencyProperty.
+        /// </summary>
+        /// <value>The major label background brush.</value>
+        public Brush MajorLabelBackgroundBrush
+        {
+            get { return (Brush)GetValue(MajorLabelBackgroundBrushProperty); }
+            set { SetValue(MajorLabelBackgroundBrushProperty, value); }
+        }
+
+        public static readonly DependencyProperty MajorLabelBackgroundBrushProperty = DependencyProperty.Register(
+          "MajorLabelBackgroundBrush",
+          typeof(Brush),
+          typeof(DateTimeAxis),
+          new FrameworkPropertyMetadata(Brushes.Beige));
+
+
+        public Brush MajorLabelRectangleBorderProperty
+        {
+            get { return (Brush)GetValue(MajorLabelRectangleBorderPropertyProperty); }
+            set { SetValue(MajorLabelRectangleBorderPropertyProperty, value); }
+        }
+
+        public static readonly DependencyProperty MajorLabelRectangleBorderPropertyProperty = DependencyProperty.Register(
+          "MajorLabelRectangleBorderProperty",
+          typeof(Brush),
+          typeof(DateTimeAxis),
+          new FrameworkPropertyMetadata(Brushes.Peru));
+
+        #endregion // end of VisualProperties
+
+        private ViewportRestriction restriction = new DateTimeHorizontalAxisRestriction();
+        protected ViewportRestriction Restriction
+        {
+            get { return restriction; }
+            set { restriction = value; }
+        }
+
+        protected override void OnPlotterAttached(Plotter2D plotter)
+        {
+            base.OnPlotterAttached(plotter);
+
+            plotter.Viewport.Restrictions.Add(restriction);
+        }
+
+        protected override void OnPlotterDetaching(Plotter2D plotter)
+        {
+            plotter.Viewport.Restrictions.Remove(restriction);
+
+            base.OnPlotterDetaching(plotter);
+        }
+
+        private static readonly long minTicks = DateTime.MinValue.Ticks;
+        private static readonly long maxTicks = DateTime.MaxValue.Ticks;
+        private static DateTime DoubleToDate(double d)
+        {
+            long ticks = (long)(d * 10000000000L);
+
+            // todo should we throw an exception if number of ticks is too big or small?
+            if (ticks < minTicks)
+                ticks = minTicks;
+            else if (ticks > maxTicks)
+                ticks = maxTicks;
+
+            return new DateTime(ticks);
+        }
+
+        /// <summary>
+        /// Sets conversions of axis - functions used to convert values of axis type to and from double values of viewport.
+        /// Sets both ConvertToDouble and ConvertFromDouble properties.
+        /// </summary>
+        /// <param name="min">The minimal viewport value.</param>
+        /// <param name="minValue">The value of axis type, corresponding to minimal viewport value.</param>
+        /// <param name="max">The maximal viewport value.</param>
+        /// <param name="maxValue">The value of axis type, corresponding to maximal viewport value.</param>
+        public override void SetConversion(double min, DateTime minValue, double max, DateTime maxValue)
+        {
+            var conversion = new DateTimeToDoubleConversion(min, minValue, max, maxValue);
+
+            ConvertToDouble = conversion.ToDouble;
+            ConvertFromDouble = conversion.FromDouble;
+        }
+    }
+}