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#region License
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/* FNA - XNA4 Reimplementation for Desktop Platforms
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* Copyright 2009-2020 Ethan Lee and the MonoGame Team
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*
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* Released under the Microsoft Public License.
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* See LICENSE for details.
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*/
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#endregion
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#region Using Statements
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using System;
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using System.Collections;
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using System.Collections.Generic;
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#endregion
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namespace Microsoft.Xna.Framework.Input.Touch
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{
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// https://msdn.microsoft.com/en-us/library/microsoft.xna.framework.input.touch.touchcollection.aspx
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public struct TouchCollection : IList<TouchLocation>, ICollection<TouchLocation>, IEnumerable<TouchLocation>, IEnumerable
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{
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#region Public Properties
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public int Count
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{
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get
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{
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return touches.Count;
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}
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}
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public bool IsConnected
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{
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get
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{
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return TouchPanel.TouchDeviceExists;
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}
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}
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public bool IsReadOnly
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{
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get
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{
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return true;
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}
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}
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public TouchLocation this[int index]
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{
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get
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{
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return touches[index];
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}
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set
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{
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// This will cause a runtime exception
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touches[index] = value;
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}
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}
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#endregion
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#region Private Variables
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private readonly List<TouchLocation> touches;
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#endregion
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#region Public Constructor
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public TouchCollection(TouchLocation[] touches)
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{
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this.touches = new List<TouchLocation>(touches);
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}
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#endregion
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#region Public Methods
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/* Since the collection is always readonly, using any
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* method that attempts to modify touches will result
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* in a System.NotSupportedException at runtime.
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*/
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public void Add(TouchLocation item)
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{
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touches.Add(item);
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}
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public void Clear()
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{
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touches.Clear();
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}
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public bool Contains(TouchLocation item)
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{
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return touches.Contains(item);
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}
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public void CopyTo(TouchLocation[] array, int arrayIndex)
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{
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touches.CopyTo(array, arrayIndex);
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}
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public bool FindById(int id, out TouchLocation touchLocation)
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{
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foreach (TouchLocation touch in touches)
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{
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if (touch.Id == id)
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{
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touchLocation = touch;
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return true;
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}
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}
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touchLocation = new TouchLocation(
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-1,
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TouchLocationState.Invalid,
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Vector2.Zero
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);
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return false;
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}
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public Enumerator GetEnumerator()
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{
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return new Enumerator(this);
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}
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public int IndexOf(TouchLocation item)
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{
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return touches.IndexOf(item);
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}
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public void Insert(int index, TouchLocation item)
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{
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touches.Insert(index, item);
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}
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public bool Remove(TouchLocation item)
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{
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return touches.Remove(item);
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}
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public void RemoveAt(int index)
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{
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touches.RemoveAt(index);
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}
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#endregion
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#region IEnumerator Methods
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IEnumerator System.Collections.IEnumerable.GetEnumerator()
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{
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return new Enumerator(this);
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}
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IEnumerator<TouchLocation> System.Collections.Generic.IEnumerable<TouchLocation>.GetEnumerator()
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{
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return new Enumerator(this);
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}
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#endregion
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#region Enumerator
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// https://msdn.microsoft.com/en-us/library/microsoft.xna.framework.input.touch.touchcollection.enumerator.aspx
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public struct Enumerator : IEnumerator<TouchLocation>, IDisposable, IEnumerator
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{
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private TouchCollection collection;
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private int position;
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internal Enumerator(TouchCollection collection)
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{
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this.collection = collection;
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position = -1;
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}
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public TouchLocation Current
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{
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get
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{
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return collection[position];
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}
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}
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public bool MoveNext()
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{
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position += 1;
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return (position < collection.Count);
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}
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public void Dispose()
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{
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}
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object IEnumerator.Current
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{
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get
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{
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return collection[position];
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}
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}
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void IEnumerator.Reset()
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{
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position = -1;
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}
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}
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#endregion
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}
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}
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