diff options
Diffstat (limited to 'mcs/class/Mono.C5/UserGuideExamples/EventPatterns.cs')
| -rw-r--r-- | mcs/class/Mono.C5/UserGuideExamples/EventPatterns.cs | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/mcs/class/Mono.C5/UserGuideExamples/EventPatterns.cs b/mcs/class/Mono.C5/UserGuideExamples/EventPatterns.cs deleted file mode 100644 index 36d41a66ef4..00000000000 --- a/mcs/class/Mono.C5/UserGuideExamples/EventPatterns.cs +++ /dev/null @@ -1,213 +0,0 @@ -/*
- Copyright (c) 2003-2006 Niels Kokholm and Peter Sestoft
- Permission is hereby granted, free of charge, to any person obtaining a copy
- of this software and associated documentation files (the "Software"), to deal
- in the Software without restriction, including without limitation the rights
- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- copies of the Software, and to permit persons to whom the Software is
- furnished to do so, subject to the following conditions:
-
- The above copyright notice and this permission notice shall be included in
- all copies or substantial portions of the Software.
-
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- SOFTWARE.
-*/
-
-// C5 example: EventPatterns.cs for pattern chapter
-
-// Compile with
-// csc /r:C5.dll EventPatterns.cs
-
-using System;
-using C5;
-using SCG = System.Collections.Generic;
-
-namespace EventPatterns {
- class EventPatterns {
- public static void Main(String[] args) {
- UnindexedCollectionEvents();
- Console.WriteLine("--------------------");
- IndexedCollectionEvents();
- Console.WriteLine("--------------------");
- UpdateEvent();
- }
-
- public static void UnindexedCollectionEvents() {
- ICollection<int> coll = new ArrayList<int>();
- ICollection<int> bag1 = new HashBag<int>();
- bag1.AddAll(new int[] { 3, 2, 5, 5, 7, 7, 5, 3, 7, 7 });
- // Add change handler
- coll.CollectionChanged
- += delegate(Object c) {
- Console.WriteLine("Collection changed");
- };
- // Add cleared handler
- coll.CollectionCleared
- += delegate(Object c, ClearedEventArgs args) {
- Console.WriteLine("Collection cleared");
- };
- // Add added handler
- coll.ItemsAdded
- += delegate(Object c, ItemCountEventArgs<int> args) {
- Console.WriteLine("Item {0} added", args.Item);
- };
- // Add item count handler
- AddItemsAddedCounter(coll);
- AddItemsRemovedCounter(coll);
- coll.AddAll(bag1);
- coll.RemoveAll(new int[] { 2, 5, 6, 3, 7, 2 });
- coll.Clear();
- ICollection<int> bag2 = new HashBag<int>();
- // Add added handler with multiplicity
- bag2.ItemsAdded
- += delegate(Object c, ItemCountEventArgs<int> args) {
- Console.WriteLine("{0} copies of {1} added",
- args.Count, args.Item);
- };
- bag2.AddAll(bag1);
- // Add removed handler with multiplicity
- bag2.ItemsRemoved
- += delegate(Object c, ItemCountEventArgs<int> args) {
- Console.WriteLine("{0} copies of {1} removed",
- args.Count, args.Item);
- };
- bag2.RemoveAllCopies(7);
- }
-
- // This works for all kinds of collections, also those with bag
- // semantics and representing duplicates by counting:
-
- private static void AddItemsAddedCounter<T>(ICollection<T> coll) {
- int addedCount = 0;
- coll.ItemsAdded
- += delegate(Object c, ItemCountEventArgs<T> args) {
- addedCount += args.Count;
- };
- coll.CollectionChanged
- += delegate(Object c) {
- if (addedCount > 0)
- Console.WriteLine("{0} items were added", addedCount);
- addedCount = 0;
- };
- }
-
- // This works for all kinds of collections, also those with bag
- // semantics and representing duplicates by counting:
-
- private static void AddItemsRemovedCounter<T>(ICollection<T> coll) {
- int removedCount = 0;
- coll.ItemsRemoved
- += delegate(Object c, ItemCountEventArgs<T> args) {
- removedCount += args.Count;
- };
- coll.CollectionChanged
- += delegate(Object c) {
- if (removedCount > 0)
- Console.WriteLine("{0} items were removed", removedCount);
- removedCount = 0;
- };
- }
-
- // Event patterns on indexed collections
-
- public static void IndexedCollectionEvents() {
- IList<int> coll = new ArrayList<int>();
- ICollection<int> bag = new HashBag<int>();
- bag.AddAll(new int[] { 3, 2, 5, 5, 7, 7, 5, 3, 7, 7 });
- // Add item inserted handler
- coll.ItemInserted
- += delegate(Object c, ItemAtEventArgs<int> args) {
- Console.WriteLine("Item {0} inserted at {1}",
- args.Item, args.Index);
- };
- coll.InsertAll(0, bag);
- // Add item removed-at handler
- coll.ItemRemovedAt
- += delegate(Object c, ItemAtEventArgs<int> args) {
- Console.WriteLine("Item {0} removed at {1}",
- args.Item, args.Index);
- };
- coll.RemoveLast();
- coll.RemoveFirst();
- coll.RemoveAt(1);
- }
-
- // Recognizing Update event as a Removed-Added-Changed sequence
-
- private enum State { Before, Removed, Updated };
-
- private static void AddItemUpdatedHandler<T>(ICollection<T> coll) {
- State state = State.Before;
- T removed = default(T), added = default(T);
- coll.ItemsRemoved
- += delegate(Object c, ItemCountEventArgs<T> args) {
- if (state==State.Before) {
- state = State.Removed;
- removed = args.Item;
- } else
- state = State.Before;
- };
- coll.ItemsAdded
- += delegate(Object c, ItemCountEventArgs<T> args) {
- if (state==State.Removed) {
- state = State.Updated;
- added = args.Item;
- } else
- state = State.Before;
- };
- coll.CollectionChanged
- += delegate(Object c) {
- if (state==State.Updated)
- Console.WriteLine("Item {0} was updated to {1}",
- removed, added);
- state = State.Before;
- };
- }
-
- public static void UpdateEvent() {
- ICollection<Teacher> coll = new HashSet<Teacher>();
- AddItemUpdatedHandler(coll);
- Teacher kristian = new Teacher("Kristian", "physics");
- coll.Add(kristian);
- coll.Add(new Teacher("Poul Einer", "mathematics"));
- // This should be caught by the update handler:
- coll.Update(new Teacher("Thomas", "mathematics"));
- // This should not be caught by the update handler:
- coll.Remove(kristian);
- coll.Add(new Teacher("Jens", "physics"));
- // The update handler is activated also by indexed updates
- IList<int> list = new ArrayList<int>();
- list.AddAll(new int[] { 7, 11, 13 });
- AddItemUpdatedHandler(list);
- list[1] = 9;
- }
- }
-
- // Example class where objects may be equal yet display differently
-
- class Teacher : IEquatable<Teacher> {
- private readonly String name, subject;
-
- public Teacher(String name, String subject) {
- this.name = name; this.subject = subject;
- }
-
- public bool Equals(Teacher that) {
- return this.subject.Equals(that.subject);
- }
-
- public override int GetHashCode() {
- return subject.GetHashCode();
- }
-
- public override String ToString() {
- return name + "[" + subject + "]";
- }
- }
-}
|