40 lines
942 B
C#
40 lines
942 B
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace Microsoft.Research.DynamicDataDisplay.Charts
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{
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internal sealed class DateTimeToDoubleConversion
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{
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public DateTimeToDoubleConversion(double min, DateTime minDate, double max, DateTime maxDate)
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{
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this.min = min;
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this.length = max - min;
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this.ticksMin = minDate.Ticks;
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this.ticksLength = maxDate.Ticks - ticksMin;
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}
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private double min;
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private double length;
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private long ticksMin;
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private long ticksLength;
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internal DateTime FromDouble(double d)
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{
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double ratio = (d - min) / length;
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long tick = (long)(ticksMin + ticksLength * ratio);
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tick = MathHelper.Clamp(tick, DateTime.MinValue.Ticks, DateTime.MaxValue.Ticks);
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return new DateTime(tick);
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}
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internal double ToDouble(DateTime dt)
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{
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double ratio = (dt.Ticks - ticksMin) / (double)ticksLength;
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return min + ratio * length;
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}
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}
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}
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