Imported Upstream version 5.4.0.167

Former-commit-id: 5624ac747d633e885131e8349322922b6a59baaa

mcs/class/referencesource/System.Web.DataVisualization/Common/General/BaseInterfaces.cs

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+//-------------------------------------------------------------
+// <copyright company=’Microsoft Corporation’>
+//   Copyright © Microsoft Corporation. All Rights Reserved.
+// </copyright>
+//-------------------------------------------------------------
+// @owner=alexgor, deliant, victark
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Collections;
+
+#if WINFORMS_CONTROL
+namespace System.Windows.Forms.DataVisualization.Charting
+#else
+namespace System.Web.UI.DataVisualization.Charting
+#endif
+{
+    /// <summary>
+    /// IChartElement is implemented by both ChartElements and ChartElementCollection to provide a unified access to Parent/Common elements. 
+    /// </summary>
+    internal interface IChartElement
+    {
+        //Properties
+        IChartElement Parent { get; set; }
+        CommonElements Common { get; }
+
+        //Methods
+        void Invalidate();
+    }
+
+
+    /// <summary>
+    /// Named controller interface allows ChartNamedElements to check the uniqueness of their names 
+    /// </summary>
+    internal interface INameController
+    {
+
+        /// <summary>
+        /// Determines whether is the name us unique.
+        /// </summary>
+        /// <param name="name">The name.</param>
+        /// <returns>
+        /// 	<c>true</c> if is the name us unique; otherwise, <c>false</c>.
+        /// </returns>
+        bool IsUniqueName(string name);
+        /// <summary>
+        /// Gets or sets a value indicating whether this instance is in edit mode by collecrtion editor.
+        /// </summary>
+        /// <value>
+        /// 	<c>true</c> if this instance the colection is editing; otherwise, <c>false</c>.
+        /// </value>
+        bool IsColectionEditing { get; set; }
+        /// <summary>
+        /// Does the snapshot of collection items.
+        /// </summary>
+        /// <param name="save">if set to <c>true</c> collection items will be saved.</param>
+        /// <param name="changingCallback">The changing callback.</param>
+        /// <param name="changedCallback">The changed callback.</param>
+        void DoSnapshot(bool save,
+            EventHandler<NameReferenceChangedEventArgs> changingCallback,
+            EventHandler<NameReferenceChangedEventArgs> changedCallback);
+        /// <summary>
+        /// Gets the snapshot of saved collection items.
+        /// </summary>
+        /// <value>The snapshot.</value>
+        IList Snapshot {get;}
+        /// <summary>
+        /// Raises the <see cref="E:NameReferenceChanged"/> event.
+        /// </summary>
+        /// <param name="e">The <see cref="NameReferenceChangedEventArgs"/> instance containing the event data.</param>
+        void OnNameReferenceChanged(NameReferenceChangedEventArgs e);
+        /// <summary>
+        /// Raises the <see cref="E:NameReferenceChanging"/> event.
+        /// </summary>
+        /// <param name="e">The <see cref="NameReferenceChangedEventArgs"/> instance containing the event data.</param>
+        void OnNameReferenceChanging(NameReferenceChangedEventArgs e);
+    }
+
+}