#region License Information /* HeuristicLab * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL) * * This file is part of HeuristicLab. * * HeuristicLab is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * HeuristicLab is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with HeuristicLab. If not, see . */ #endregion using System; using System.Drawing; using HeuristicLab.Common; using HeuristicLab.Persistence.Default.CompositeSerializers.Storable; namespace HeuristicLab.Core { /// /// Represents a variable which has a name and holds an IItem. /// [Item("Variable", "A variable which has a name and holds an IItem.")] [StorableClass] public sealed class Variable : NamedItem, IVariable { public override Image ItemImage { get { if (value != null) return value.ItemImage; else return base.ItemImage; } } [Storable] private IItem value; /// /// Calls in the setter. public IItem Value { get { return value; } set { if (this.value != value) { DeregisterValueEvents(); this.value = value; RegisterValueEvents(); OnValueChanged(); } } } [StorableConstructor] private Variable(bool deserializing) : base(deserializing) { } private Variable(Variable original, Cloner cloner) : base(original, cloner) { value = cloner.Clone(original.value); RegisterValueEvents(); } /// /// Initializes a new instance of with name Anonymous /// and value null. /// public Variable() : base("Anonymous") { this.value = null; } /// /// Initializes a new instance of with the specified /// and the specified . /// /// The name of the current instance. /// The value of the current instance. public Variable(string name) : base(name) { this.value = null; } public Variable(string name, string description) : base(name, description) { this.value = null; } public Variable(string name, IItem value) : base(name) { this.value = value; RegisterValueEvents(); } public Variable(string name, string description, IItem value) : base(name, description) { this.value = value; RegisterValueEvents(); } [StorableHook(HookType.AfterDeserialization)] private void AfterDeserialization() { RegisterValueEvents(); } /// /// Clones the current instance (deep clone). /// /// Dictionary of all already cloned objects. (Needed to avoid cycles.) /// The cloned object as . public override IDeepCloneable Clone(Cloner cloner) { return new Variable(this, cloner); } /// /// Gets the string representation of the current instance in the format: Name: [null|Value]. /// /// The current instance as a string. public override string ToString() { if (Value == null) return string.Format("{0}: null", Name); else return string.Format("{0}: {1}", Name, Value.ToString()); } /// public event EventHandler ValueChanged; /// /// Fires a new ValueChanged even. /// private void OnValueChanged() { var handler = ValueChanged; if (handler != null) handler(this, EventArgs.Empty); OnItemImageChanged(); OnToStringChanged(); } private void RegisterValueEvents() { if (value != null) { value.ItemImageChanged += new EventHandler(Value_ItemImageChanged); value.ToStringChanged += new EventHandler(Value_ToStringChanged); } } private void DeregisterValueEvents() { if (value != null) { value.ItemImageChanged -= new EventHandler(Value_ItemImageChanged); value.ToStringChanged -= new EventHandler(Value_ToStringChanged); } } private void Value_ItemImageChanged(object sender, EventArgs e) { OnItemImageChanged(); } private void Value_ToStringChanged(object sender, EventArgs e) { OnToStringChanged(); } } }