123 lines
3.9 KiB
C#
Executable File
123 lines
3.9 KiB
C#
Executable File
//
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// Context.cs
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//
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// Author:
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// Mike Becker <alcexhim@gmail.com>
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//
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// Copyright (c) 2019 Mike Becker
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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using System;
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using System.Collections.Generic;
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namespace MBS.Framework
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{
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public class Context
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{
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public class ContextCollection
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: System.Collections.ObjectModel.Collection<Context>
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{
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private Dictionary<Guid, Context> _ItemsByID = new Dictionary<Guid, Context>();
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public bool Contains(Guid contextID)
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{
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return _ItemsByID.ContainsKey(contextID);
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}
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public Context this[Guid id]
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{
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get
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{
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if (_ItemsByID.ContainsKey(id))
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return _ItemsByID[id];
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return null;
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}
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}
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protected override void ClearItems()
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{
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base.ClearItems();
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_ItemsByID.Clear();
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}
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protected override void InsertItem(int index, Context item)
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{
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base.InsertItem(index, item);
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_ItemsByID[item.ID] = item;
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}
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protected override void RemoveItem(int index)
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{
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_ItemsByID.Remove(this[index].ID);
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base.RemoveItem(index);
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}
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}
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public Guid ID { get; private set; } = Guid.Empty;
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public string Name { get; private set; } = String.Empty;
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// public MenuBar MenuBar { get; } = new MenuBar();
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public Command.CommandCollection Commands { get; } = new Command.CommandCollection();
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public Context(Guid id, string name)
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{
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ID = id;
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Name = name;
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}
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public override string ToString()
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{
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return String.Format("{0} {1}", Name, ID);
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}
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private Dictionary<string, List<EventHandler>> _CommandEventHandlers = new Dictionary<string, List<EventHandler>>();
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/// <summary>
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/// Attachs an event handler for the command with the ID specified by <paramref name="commandID" />.
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/// </summary>
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/// <returns><c>true</c>, if command event handler was attached, <c>false</c> otherwise.</returns>
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/// <param name="commandID">The ID of the <see cref="Command" /> for which to attach an event handler.</param>
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/// <param name="handler">The event handler to invoke when the <see cref="Command" /> is executed.</param>
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public bool AttachCommandEventHandler(string commandID, EventHandler handler)
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{
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// handle command event handlers attached without a Command instance
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if (!_CommandEventHandlers.ContainsKey(commandID))
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{
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_CommandEventHandlers.Add(commandID, new List<EventHandler>());
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}
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if (!_CommandEventHandlers[commandID].Contains(handler))
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{
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_CommandEventHandlers[commandID].Add(handler);
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return true;
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}
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return false;
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}
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/// <summary>
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/// Executes the command (i.e., calls all attached <see cref="EventHandler" />s for the <see cref="Command" />) with
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/// the given <paramref name="commandID" />, passing in the given parameters in an instance of <see cref="CommandEventArgs" />.
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/// </summary>
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/// <returns><c>true</c>, if command was executed, <c>false</c> otherwise.</returns>
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/// <param name="commandID">Command identifier.</param>
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/// <param name="namedParameters">Named parameters.</param>
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public bool ExecuteCommand(string commandID, KeyValuePair<string, object>[] namedParameters = null)
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{
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if (_CommandEventHandlers.ContainsKey(commandID))
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{
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for (int i = 0; i < _CommandEventHandlers[commandID].Count; i++)
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{
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_CommandEventHandlers[commandID][i](this, new CommandEventArgs(Commands[commandID], namedParameters));
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}
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}
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return false;
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}
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}
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}
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