108 lines
2.3 KiB
C#
108 lines
2.3 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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using System.Collections.ObjectModel;
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using System.Collections.Specialized;
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using System.Diagnostics.CodeAnalysis;
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namespace Microsoft.Research.DynamicDataDisplay.Charts.Axes
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{
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public class CollectionLabelProvider<T> : LabelProviderBase<int>
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{
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private IList<T> collection;
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[SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
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public IList<T> Collection
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{
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get { return collection; }
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set
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{
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if (value == null)
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throw new ArgumentNullException("value");
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if (collection != value)
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{
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DetachCollection();
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collection = value;
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AttachCollection();
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RaiseChanged();
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}
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}
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}
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#region Collection changed
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private void AttachCollection()
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{
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INotifyCollectionChanged observableCollection = collection as INotifyCollectionChanged;
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if (observableCollection != null)
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{
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observableCollection.CollectionChanged += OnCollectionChanged;
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}
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}
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private void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
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{
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RaiseChanged();
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}
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private void DetachCollection()
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{
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INotifyCollectionChanged observableCollection = collection as INotifyCollectionChanged;
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if (observableCollection != null)
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{
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observableCollection.CollectionChanged -= OnCollectionChanged;
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}
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}
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#endregion
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/// <summary>
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/// Initializes a new instance of the <see cref="CollectionLabelProvider<T>"/> class with empty labels collection.
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/// </summary>
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public CollectionLabelProvider() { }
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public CollectionLabelProvider(IList<T> collection)
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: this()
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{
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Collection = collection;
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}
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public override UIElement[] CreateLabels(ITicksInfo<int> ticksInfo)
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{
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var ticks = ticksInfo.Ticks;
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UIElement[] res = new UIElement[ticks.Length];
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var tickInfo = new LabelTickInfo<int> { Info = ticksInfo.Info };
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for (int i = 0; i < res.Length; i++)
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{
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int tick = ticks[i];
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tickInfo.Tick = tick;
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if (0 <= tick && tick < collection.Count)
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{
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string text = collection[tick].ToString();
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res[i] = new TextBlock
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{
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Text = text,
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ToolTip = text
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};
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}
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else
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{
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res[i] = null;
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}
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}
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return res;
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}
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}
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}
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