[2768] | 1 | using System;
|
---|
| 2 | using System.Collections;
|
---|
| 3 | using System.Collections.Generic;
|
---|
| 4 |
|
---|
| 5 |
|
---|
[4068] | 6 | namespace Netron.Diagramming.Core {
|
---|
| 7 | /// <summary>
|
---|
| 8 | /// This is a wrapper around the <see cref="Stack"/> which communicates Push and Pop events
|
---|
| 9 | /// </summary>
|
---|
| 10 | /// <typeparam name="T"></typeparam>
|
---|
| 11 | public class StackBase<T> {
|
---|
| 12 | #region Fields
|
---|
[2768] | 13 | /// <summary>
|
---|
[4068] | 14 | /// the internal stack based on the .Net <see cref="Stack"/> implementation
|
---|
[2768] | 15 | /// </summary>
|
---|
[4068] | 16 | private Stack<T> InnerStack;
|
---|
| 17 | #endregion
|
---|
[2768] | 18 |
|
---|
[4068] | 19 | #region Events
|
---|
| 20 | /// <summary>
|
---|
| 21 | /// Occurs when an item is pushed onto the stack
|
---|
| 22 | /// </summary>
|
---|
| 23 | public event EventHandler<CollectionEventArgs<T>> OnItemPushed;
|
---|
| 24 | /// <summary>
|
---|
| 25 | /// Occurs when an item is popped from the stack
|
---|
| 26 | /// </summary>
|
---|
| 27 | public event EventHandler<CollectionEventArgs<T>> OnItemPopped;
|
---|
| 28 | #endregion;
|
---|
[2768] | 29 |
|
---|
[4068] | 30 | #region Constructor
|
---|
| 31 | /// <summary>
|
---|
| 32 | /// Initializes a new instance of the <see cref="T:StackBase<T>"/> class.
|
---|
| 33 | /// </summary>
|
---|
| 34 | public StackBase() {
|
---|
| 35 | InnerStack = new Stack<T>();
|
---|
| 36 | }
|
---|
| 37 | #endregion
|
---|
[2768] | 38 |
|
---|
[4068] | 39 | #region Methods
|
---|
[2768] | 40 |
|
---|
[4068] | 41 | /// <summary>
|
---|
| 42 | /// Gets the number of elements in the stack
|
---|
| 43 | /// </summary>
|
---|
| 44 | /// <value>The count.</value>
|
---|
| 45 | public int Count {
|
---|
| 46 | get { return InnerStack.Count; }
|
---|
| 47 | }
|
---|
[2768] | 48 |
|
---|
| 49 |
|
---|
[4068] | 50 | /// <summary>
|
---|
| 51 | /// Pushes the specified item.
|
---|
| 52 | /// </summary>
|
---|
| 53 | /// <param name="item">A parameter of the generics Type T</param>
|
---|
| 54 | public void Push(T item) {
|
---|
[2768] | 55 |
|
---|
[4068] | 56 | this.InnerStack.Push(item);
|
---|
| 57 | RaiseOnItemPushed(item);
|
---|
[2768] | 58 |
|
---|
[4068] | 59 | }
|
---|
[2768] | 60 |
|
---|
[4068] | 61 | /// <summary>
|
---|
| 62 | /// Pops the next item from the stack
|
---|
| 63 | /// </summary>
|
---|
| 64 | /// <returns></returns>
|
---|
| 65 | public T Pop() {
|
---|
| 66 | T item =
|
---|
| 67 | InnerStack.Pop();
|
---|
| 68 | RaiseOnItemPopped(item);
|
---|
| 69 | return item;
|
---|
| 70 | }
|
---|
[2768] | 71 |
|
---|
[4068] | 72 | /// <summary>
|
---|
| 73 | /// Peeks the next item in the stack
|
---|
| 74 | /// </summary>
|
---|
| 75 | /// <returns></returns>
|
---|
| 76 | public T Peek() {
|
---|
| 77 | return InnerStack.Peek();
|
---|
| 78 | }
|
---|
[2768] | 79 |
|
---|
| 80 |
|
---|
[4068] | 81 | /// <summary>
|
---|
| 82 | /// Converts the stack to an array.
|
---|
| 83 | /// </summary>
|
---|
| 84 | /// <returns></returns>
|
---|
| 85 | public T[] ToArray() {
|
---|
| 86 | return InnerStack.ToArray();
|
---|
| 87 | }
|
---|
[2768] | 88 |
|
---|
| 89 |
|
---|
[4068] | 90 | /// <summary>
|
---|
| 91 | /// Raises the <see cref="OnItemPushed"/>.
|
---|
| 92 | /// </summary>
|
---|
| 93 | /// <param name="item">A parameter of the generics Type T</param>
|
---|
| 94 | private void RaiseOnItemPushed(T item) {
|
---|
| 95 | EventHandler<CollectionEventArgs<T>> handler = OnItemPushed;
|
---|
| 96 | handler(this, new CollectionEventArgs<T>(item));
|
---|
| 97 | }
|
---|
[2768] | 98 |
|
---|
[4068] | 99 | /// <summary>
|
---|
| 100 | /// Raises the on OnItemPopped event.
|
---|
| 101 | /// </summary>
|
---|
| 102 | /// <param name="item">A parameter of the generics Type T</param>
|
---|
| 103 | private void RaiseOnItemPopped(T item) {
|
---|
| 104 | EventHandler<CollectionEventArgs<T>> handler = OnItemPopped;
|
---|
| 105 | handler(this, new CollectionEventArgs<T>(item));
|
---|
| 106 | }
|
---|
[2768] | 107 |
|
---|
| 108 |
|
---|
[4068] | 109 | #endregion
|
---|
[2768] | 110 |
|
---|
[4068] | 111 | }
|
---|
[2768] | 112 | }
|
---|