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151 lines
No EOL
4.7 KiB
C#
151 lines
No EOL
4.7 KiB
C#
/*
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* Greenshot - a free and open source screenshot tool
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* Copyright (C) 2007-2013 Thomas Braun, Jens Klingen, Robin Krom
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*
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* For more information see: http://getgreenshot.org/
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* The Greenshot project is hosted on Sourceforge: http://sourceforge.net/projects/greenshot/
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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 1 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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*/
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using System;
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using System.ComponentModel;
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namespace Greenshot.Drawing.Fields
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{
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/// <summary>
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/// Represents a single field of a drawable element, i.e.
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/// line thickness of a rectangle.
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/// </summary>
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[Serializable]
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public class Field : INotifyPropertyChanged
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{
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[field: NonSerialized]
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public event PropertyChangedEventHandler PropertyChanged;
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public object myValue;
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public object Value
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{
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get
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{
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return myValue;
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}
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set
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{
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if (!Equals(myValue, value))
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{
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myValue = value;
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if (PropertyChanged != null)
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{
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PropertyChanged(this, new PropertyChangedEventArgs("Value"));
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}
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}
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}
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}
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public FieldType FieldType;
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public string Scope;
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/// <summary>
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/// Constructs a new Field instance, usually you should be using FieldFactory
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/// to create Fields.
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/// </summary>
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/// <param name="fieldType">FieldType of the Field to be created</param>
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/// <param name="scope">The scope to which the value of this Field is relevant.
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/// Depending on the scope the Field's value may be shared for other elements
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/// containing the same FieldType for defaulting to the last used value.
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/// When scope is set to a Type (e.g. typeof(RectangleContainer)), its value
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/// should not be reused for FieldHolders of another Type (e.g. typeof(EllipseContainer))
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/// </param>
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public Field(FieldType fieldType, Type scope)
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{
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FieldType = fieldType;
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Scope = scope.Name;
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}
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public Field(FieldType fieldType, string scope)
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{
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FieldType = fieldType;
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Scope = scope;
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}
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public Field(FieldType fieldType)
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{
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FieldType = fieldType;
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}
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/// <summary>
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/// Returns true if this field holds a value other than null.
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/// </summary>
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public bool HasValue
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{
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get { return Value != null; }
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}
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/// <summary>
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/// Creates a flat clone of this Field. The fields value itself is not cloned.
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/// </summary>
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/// <returns></returns>
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public Field Clone()
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{
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Field ret = new Field(FieldType, Scope);
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ret.Value = Value;
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return ret;
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}
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public override int GetHashCode()
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{
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int hashCode = 0;
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unchecked
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{
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hashCode += 1000000009 * FieldType.GetHashCode();
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if (Scope != null)
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hashCode += 1000000021 * Scope.GetHashCode();
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}
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return hashCode;
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}
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public override bool Equals(object obj)
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{
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Field other = obj as Field;
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if (other == null)
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{
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return false;
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}
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return FieldType == other.FieldType && Equals(Scope, other.Scope);
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}
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public override string ToString()
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{
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return string.Format("[Field FieldType={1} Value={0} Scope={2}]", myValue, FieldType, Scope);
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}
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}
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/// <summary>
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/// EventHandler to be used when a field value changes
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/// </summary>
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public delegate void FieldChangedEventHandler(object sender, FieldChangedEventArgs e);
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/// <summary>
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/// EventArgs to be used with FieldChangedEventHandler
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/// </summary>
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public class FieldChangedEventArgs : EventArgs
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{
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public readonly Field Field;
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public FieldChangedEventArgs(Field field)
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{
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Field = field;
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}
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}
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} |