"Merged" 0.8 with HEAD, so we can continue developing

git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@1282 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4

Greenshot/Drawing/Fields/AbstractFieldHolder.cs

@@ -0,0 +1,159 @@
+/*
+ * Greenshot - a free and open source screenshot tool
+ * Copyright (C) 2007-2011  Thomas Braun, Jens Klingen, Robin Krom
+ * 
+ * For more information see: http://getgreenshot.org/
+ * The Greenshot project is hosted on Sourceforge: http://sourceforge.net/projects/greenshot/
+ * 
+ * This program 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 1 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Drawing;
+using System.Reflection;
+using System.Runtime.Serialization;
+
+using Greenshot.Configuration;
+using Greenshot.Helpers;
+using GreenshotPlugin.Core;
+
+namespace Greenshot.Drawing.Fields {
+	/// <summary>
+	/// Basic IFieldHolder implementation, providing access to a set of fields
+	/// </summary>
+	[Serializable()]
+	public abstract class AbstractFieldHolder : IFieldHolder {
+		private static readonly log4net.ILog LOG = log4net.LogManager.GetLogger(typeof(AbstractFieldHolder));
+		private static EditorConfiguration editorConfiguration = IniConfig.GetIniSection<EditorConfiguration>();
+
+		/// <summary>
+		/// called when a field's value has changed
+		/// </summary>
+		[NonSerialized]
+		private FieldChangedEventHandler fieldChanged;
+		public event FieldChangedEventHandler FieldChanged {
+			add { fieldChanged += value; }
+			remove{ fieldChanged -= value; }
+		}
+		
+		// we keep to Coolections of our fields, dictionary for quick access, list for serialization
+		// this allows us to use default serialization
+		[NonSerialized]
+		private Dictionary<FieldType, Field> fieldsByType = new Dictionary<FieldType, Field>();
+		private List<Field> fields = new List<Field>();
+		
+		public AbstractFieldHolder() {}
+		
+		[OnDeserializedAttribute()]
+		private void OnDeserialized(StreamingContext context) {
+			fieldsByType  = new Dictionary<FieldType, Field>();
+			// listen to changing properties
+			foreach(Field field in fields) {
+				field.PropertyChanged += delegate { if(fieldChanged != null) fieldChanged(this, new FieldChangedEventArgs(field)); };
+				fieldsByType[field.FieldType] = field;
+			}
+		}
+
+		public void AddField(Type requestingType, FieldType fieldType, object fieldValue) {
+			AddField(editorConfiguration.CreateField(requestingType, fieldType, fieldValue));
+		}
+
+		public virtual void AddField(Field field) {
+			if(fieldsByType != null && fieldsByType.ContainsKey(field.FieldType)) {
+				if(LOG.IsDebugEnabled) {
+					LOG.DebugFormat("A field with of type '{0}' already exists in this {1}, will overwrite.", field.FieldType, GetType());
+				}
+			} 
+			
+			fields.Add(field);
+			fieldsByType[field.FieldType] = field;
+			field.PropertyChanged += delegate { if(fieldChanged != null) fieldChanged(this, new FieldChangedEventArgs(field)); };
+		}
+		
+		public void RemoveField(Field field) {
+			fields.Remove(field);
+			fieldsByType.Remove(field.FieldType);
+			field.PropertyChanged -= delegate { if(fieldChanged != null) fieldChanged(this, new FieldChangedEventArgs(field)); };
+		}
+		
+		public List<Field> GetFields() {
+			return fields;
+		}
+
+		
+		public Field GetField(FieldType fieldType) {
+			try {
+				return fieldsByType[fieldType];
+			} catch(KeyNotFoundException e) {
+				throw new ArgumentException("Field '"+fieldType+"' does not exist in " + GetType(), e);
+			}
+		}
+		
+		public object GetFieldValue(FieldType fieldType) {
+			return GetField(fieldType).Value;
+		}
+		
+		#region convenience methods to save us some casts outside
+		public string GetFieldValueAsString(FieldType fieldType) {
+			return (string)GetFieldValue(fieldType);
+		}
+		
+		public int GetFieldValueAsInt(FieldType fieldType) {
+			return (int)GetFieldValue(fieldType);
+		}
+		
+		public decimal GetFieldValueAsDecimal(FieldType fieldType) {
+			return (decimal)GetFieldValue(fieldType);
+		}
+		
+		public double GetFieldValueAsDouble(FieldType fieldType) {
+			return (double)GetFieldValue(fieldType);
+		}
+		
+		public float GetFieldValueAsFloat(FieldType fieldType) {
+			return (float)GetFieldValue(fieldType);
+		}
+		
+		public bool GetFieldValueAsBool(FieldType fieldType) {
+			return (bool)GetFieldValue(fieldType);
+		}
+		
+		public Color GetFieldValueAsColor(FieldType fieldType) {
+			return (Color)GetFieldValue(fieldType);
+		}
+		#endregion
+		
+		public bool HasField(FieldType fieldType) {
+			return fieldsByType.ContainsKey(fieldType);
+		}
+		
+		public bool HasFieldValue(FieldType fieldType) {
+			return HasField(fieldType) && fieldsByType[fieldType].HasValue;
+		}
+		
+		public void SetFieldValue(FieldType fieldType, object value) {
+			try {
+				fieldsByType[fieldType].Value = value;
+			} catch(KeyNotFoundException e) {
+				throw new ArgumentException("Field '"+fieldType+"' does not exist in " + GetType(), e);
+			}
+		}
+		
+		protected void OnFieldChanged(object sender, FieldChangedEventArgs e){
+			if(fieldChanged != null) fieldChanged(sender, e);
+		}
+
+	}
+}