107 lines
2.3 KiB
C#
107 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.ComponentModel;
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using System.Diagnostics;
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namespace Microsoft.Research.DynamicDataDisplay
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{
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public sealed class ValueStore : CustomTypeDescriptor, INotifyPropertyChanged
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{
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public ValueStore(params string[] propertiesNames)
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{
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foreach (var propertyName in propertiesNames)
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{
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this[propertyName] = "";
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}
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}
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private Dictionary<string, object> cache = new Dictionary<string, object>();
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public object this[string propertyName]
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{
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get { return cache[propertyName]; }
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set { SetValue(propertyName, value); }
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}
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public ValueStore SetValue(string propertyName, object value)
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{
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cache[propertyName] = value;
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PropertyChanged.Raise(this, propertyName);
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return this;
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}
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private PropertyDescriptorCollection collection;
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public override PropertyDescriptorCollection GetProperties()
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{
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PropertyDescriptor[] propertyDescriptors = new PropertyDescriptor[cache.Count];
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var keys = cache.Keys.ToArray();
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for (int i = 0; i < keys.Length; i++)
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{
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propertyDescriptors[i] = new ValueStorePropertyDescriptor(keys[i]);
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}
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collection = new PropertyDescriptorCollection(propertyDescriptors);
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return collection;
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}
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private sealed class ValueStorePropertyDescriptor : PropertyDescriptor
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{
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private readonly string name;
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public ValueStorePropertyDescriptor(string name)
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: base(name, null)
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{
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this.name = name;
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}
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public override bool CanResetValue(object component)
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{
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return false;
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}
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public override Type ComponentType
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{
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get { return typeof(ValueStore); }
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}
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public override object GetValue(object component)
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{
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ValueStore store = (ValueStore)component;
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return store[name];
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}
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public override bool IsReadOnly
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{
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get { return false; }
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}
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public override Type PropertyType
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{
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get { return typeof(string); }
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}
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public override void ResetValue(object component)
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{
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}
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public override void SetValue(object component, object value)
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{
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}
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public override bool ShouldSerializeValue(object component)
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{
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return false;
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}
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}
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#region INotifyPropertyChanged Members
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public event PropertyChangedEventHandler PropertyChanged;
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#endregion
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}
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}
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