Archive Browser
Download Cyotek.Windows.Forms.ImageBox.zip version 1.1.4.2, last updated 13/02/2014 (1.62 MB)
Download- md5: eafe88cd279eec36bc79f6409f0fc49d
using System;
using System.Collections;
using System.Collections.Generic;
namespace Cyotek.Windows.Forms
{
/// <summary>
/// Represents available levels of zoom in an <see cref="ImageBox"/> control
/// </summary>
public class ZoomLevelCollection : IList<int>
{
#region Public Constructors
/// <summary>
/// Initializes a new instance of the <see cref="ZoomLevelCollection"/> class.
/// </summary>
public ZoomLevelCollection()
{
this.List = new SortedList<int, int>();
}
/// <summary>
/// Initializes a new instance of the <see cref="ZoomLevelCollection"/> class.
/// </summary>
/// <param name="collection">The default values to populate the collection with.</param>
/// <exception cref="System.ArgumentNullException">Thrown if the <c>collection</c> parameter is null</exception>
public ZoomLevelCollection(IEnumerable<int> collection)
: this()
{
if (collection == null)
{
throw new ArgumentNullException("collection");
}
this.AddRange(collection);
}
#endregion
#region Class Properties
/// <summary>
/// Returns the default zoom levels
/// </summary>
public static ZoomLevelCollection Default
{
get
{
return new ZoomLevelCollection(new[]
{
7, 10, 15, 20, 25, 30, 50, 70, 100, 150, 200, 300, 400, 500, 600, 700, 800, 1200, 1600
});
}
}
#endregion
#region Public Properties
/// <summary>
/// Gets the number of elements contained in the <see cref="ZoomLevelCollection" />.
/// </summary>
/// <returns>
/// The number of elements contained in the <see cref="ZoomLevelCollection" />.
/// </returns>
public int Count
{
get { return this.List.Count; }
}
/// <summary>
/// Gets a value indicating whether the <see cref="T:System.Collections.Generic.ICollection`1" /> is read-only.
/// </summary>
/// <value><c>true</c> if this instance is read only; otherwise, <c>false</c>.</value>
/// <returns>true if the <see cref="T:System.Collections.Generic.ICollection`1" /> is read-only; otherwise, false.
/// </returns>
public bool IsReadOnly
{
get { return false; }
}
/// <summary>
/// Gets or sets the zoom level at the specified index.
/// </summary>
/// <param name="index">The index.</param>
public int this[int index]
{
get { return this.List.Values[index]; }
set
{
this.List.RemoveAt(index);
this.Add(value);
}
}
#endregion
#region Protected Properties
/// <summary>
/// Gets or sets the backing list.
/// </summary>
protected SortedList<int, int> List { get; set; }
#endregion
#region Public Members
/// <summary>
/// Adds an item to the <see cref="T:System.Collections.Generic.ICollection`1" />.
/// </summary>
/// <param name="item">The object to add to the <see cref="T:System.Collections.Generic.ICollection`1" />.</param>
public void Add(int item)
{
this.List.Add(item, item);
}
/// <summary>
/// Adds a range of items to the <see cref="ZoomLevelCollection"/>.
/// </summary>
/// <param name="collection">The items to add to the collection.</param>
/// <exception cref="System.ArgumentNullException">Thrown if the <c>collection</c> parameter is null.</exception>
public void AddRange(IEnumerable<int> collection)
{
if (collection == null)
{
throw new ArgumentNullException("collection");
}
foreach (int value in collection)
{
this.Add(value);
}
}
/// <summary>
/// Removes all items from the <see cref="T:System.Collections.Generic.ICollection`1" />.
/// </summary>
public void Clear()
{
this.List.Clear();
}
/// <summary>
/// Determines whether the <see cref="T:System.Collections.Generic.ICollection`1" /> contains a specific value.
/// </summary>
/// <param name="item">The object to locate in the <see cref="T:System.Collections.Generic.ICollection`1" />.</param>
/// <returns>true if <paramref name="item" /> is found in the <see cref="T:System.Collections.Generic.ICollection`1" />; otherwise, false.</returns>
public bool Contains(int item)
{
return this.List.ContainsKey(item);
}
/// <summary>
/// Copies a range of elements this collection into a destination <see cref="Array"/>.
/// </summary>
/// <param name="array">The <see cref="Array"/> that receives the data.</param>
/// <param name="arrayIndex">A 64-bit integer that represents the index in the <see cref="Array"/> at which storing begins.</param>
public void CopyTo(int[] array, int arrayIndex)
{
for (int i = 0; i < this.Count; i++)
{
array[arrayIndex + i] = this.List.Values[i];
}
}
/// <summary>
/// Finds the index of a zoom level matching or nearest to the specified value.
/// </summary>
/// <param name="zoomLevel">The zoom level.</param>
public int FindNearest(int zoomLevel)
{
int nearestValue = this.List.Values[0];
int nearestDifference = Math.Abs(nearestValue - zoomLevel);
for (int i = 1; i < this.Count; i++)
{
int value = this.List.Values[i];
int difference = Math.Abs(value - zoomLevel);
if (difference < nearestDifference)
{
nearestValue = value;
nearestDifference = difference;
}
}
return nearestValue;
}
/// <summary>
/// Returns an enumerator that iterates through the collection.
/// </summary>
/// <returns>A <see cref="T:System.Collections.Generic.IEnumerator`1" /> that can be used to iterate through the collection.</returns>
public IEnumerator<int> GetEnumerator()
{
return this.List.Values.GetEnumerator();
}
/// <summary>
/// Determines the index of a specific item in the <see cref="T:System.Collections.Generic.IList`1" />.
/// </summary>
/// <param name="item">The object to locate in the <see cref="T:System.Collections.Generic.IList`1" />.</param>
/// <returns>The index of <paramref name="item" /> if found in the list; otherwise, -1.</returns>
public int IndexOf(int item)
{
return this.List.IndexOfKey(item);
}
/// <summary>
/// Not implemented.
/// </summary>
/// <param name="index">The index.</param>
/// <param name="item">The item.</param>
/// <exception cref="System.NotImplementedException">Not implemented</exception>
public void Insert(int index, int item)
{
throw new NotImplementedException();
}
/// <summary>
/// Returns the next increased zoom level for the given current zoom.
/// </summary>
/// <param name="zoomLevel">The current zoom level.</param>
/// <returns>The next matching increased zoom level for the given current zoom if applicable, otherwise the nearest zoom.</returns>
public int NextZoom(int zoomLevel)
{
int index;
index = this.IndexOf(this.FindNearest(zoomLevel));
if (index < this.Count - 1)
{
index++;
}
return this[index];
}
/// <summary>
/// Returns the next decreased zoom level for the given current zoom.
/// </summary>
/// <param name="zoomLevel">The current zoom level.</param>
/// <returns>The next matching decreased zoom level for the given current zoom if applicable, otherwise the nearest zoom.</returns>
public int PreviousZoom(int zoomLevel)
{
int index;
index = this.IndexOf(this.FindNearest(zoomLevel));
if (index > 0)
{
index--;
}
return this[index];
}
/// <summary>
/// Removes the first occurrence of a specific object from the <see cref="T:System.Collections.Generic.ICollection`1" />.
/// </summary>
/// <param name="item">The object to remove from the <see cref="T:System.Collections.Generic.ICollection`1" />.</param>
/// <returns>true if <paramref name="item" /> was successfully removed from the <see cref="T:System.Collections.Generic.ICollection`1" />; otherwise, false. This method also returns false if <paramref name="item" /> is not found in the original <see cref="T:System.Collections.Generic.ICollection`1" />.</returns>
public bool Remove(int item)
{
return this.List.Remove(item);
}
/// <summary>
/// Removes the element at the specified index of the <see cref="ZoomLevelCollection"/>.
/// </summary>
/// <param name="index">The zero-based index of the element to remove.</param>
public void RemoveAt(int index)
{
this.List.RemoveAt(index);
}
/// <summary>
/// Copies the elements of the <see cref="ZoomLevelCollection"/> to a new array.
/// </summary>
/// <returns>An array containing copies of the elements of the <see cref="ZoomLevelCollection"/>.</returns>
public int[] ToArray()
{
int[] results;
results = new int[this.Count];
this.CopyTo(results, 0);
return results;
}
#endregion
#region IList<int> Members
/// <summary>
/// Returns an enumerator that iterates through a collection.
/// </summary>
/// <returns>An <see cref="ZoomLevelCollection" /> object that can be used to iterate through the collection.</returns>
IEnumerator IEnumerable.GetEnumerator()
{
return this.GetEnumerator();
}
#endregion
}
}
Donate
This software may be used free of charge, but as with all free software there are costs involved to develop and maintain.
If this site or its services have saved you time, please consider a donation to help with running costs and timely updates.
Donate