64 lines
1.6 KiB
C#
64 lines
1.6 KiB
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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using System.Windows;
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using System.Windows.Controls;
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namespace Microsoft.Research.DynamicDataDisplay.Charts.Axes.GenericLocational
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{
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public class GenericLocationalLabelProvider<TItem, TAxis> : LabelProviderBase<TAxis>
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{
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private readonly IList<TItem> collection;
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private readonly Func<TItem, string> displayMemberMapping;
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public GenericLocationalLabelProvider(IList<TItem> collection, Func<TItem, string> displayMemberMapping)
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{
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if (collection == null)
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throw new ArgumentNullException("collection");
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if (displayMemberMapping == null)
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throw new ArgumentNullException("displayMemberMapping");
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this.collection = collection;
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this.displayMemberMapping = displayMemberMapping;
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}
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int startIndex;
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public override UIElement[] CreateLabels(ITicksInfo<TAxis> ticksInfo)
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{
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var ticks = ticksInfo.Ticks;
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if (ticks.Length == 0)
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return EmptyLabelsArray;
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startIndex = (int)ticksInfo.Info;
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UIElement[] result = new UIElement[ticks.Length];
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LabelTickInfo<TAxis> labelInfo = new LabelTickInfo<TAxis> { Info = ticksInfo.Info };
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for (int i = 0; i < result.Length; i++)
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{
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var tick = ticks[i];
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labelInfo.Tick = tick;
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labelInfo.Index = i;
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string labelText = GetString(labelInfo);
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TextBlock label = new TextBlock { Text = labelText };
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ApplyCustomView(labelInfo, label);
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result[i] = label;
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}
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return result;
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}
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protected override string GetStringCore(LabelTickInfo<TAxis> tickInfo)
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{
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return displayMemberMapping(collection[tickInfo.Index + startIndex]);
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}
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}
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}
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