Events.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Ink / Events.cs / 1305600 / Events.cs
                        
                        
                            using System; 
using System.Windows.Input;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel; 

using SR = MS.Internal.PresentationCore.SR; 
using SRID = MS.Internal.PresentationCore.SRID; 

namespace System.Windows.Ink 
{

    #region Public APIs
 
    // ============================================================================================
    ///  
    /// delegate used for event handlers that are called when a stroke was was added, removed, or modified inside of a Stroke collection 
    /// 
    public delegate void StrokeCollectionChangedEventHandler(object sender, StrokeCollectionChangedEventArgs e); 

    /// 
    /// Event arg used when delegate a stroke is was added, removed, or modified inside of a Stroke collection
    ///  
    public class StrokeCollectionChangedEventArgs : EventArgs
    { 
        private StrokeCollection.ReadOnlyStrokeCollection _added; 
        private StrokeCollection.ReadOnlyStrokeCollection _removed;
        private int _index = -1; 

        /// Constructor
        internal StrokeCollectionChangedEventArgs(StrokeCollection added, StrokeCollection removed, int index) :
            this(added, removed) 
        {
            _index = index; 
        } 

        /// Constructor 
        public StrokeCollectionChangedEventArgs(StrokeCollection added, StrokeCollection removed)
        {
            if ( added == null && removed == null )
            { 
                throw new ArgumentException(SR.Get(SRID.CannotBothBeNull, "added", "removed"));
            } 
            _added = ( added == null ) ? null : new StrokeCollection.ReadOnlyStrokeCollection(added); 
            _removed = ( removed == null ) ? null : new StrokeCollection.ReadOnlyStrokeCollection(removed);
        } 

        /// Set of strokes that where added, result may be an empty collection
        public StrokeCollection Added
        { 
            get
            { 
                if ( _added == null ) 
                {
                    _added = new StrokeCollection.ReadOnlyStrokeCollection(new StrokeCollection()); 
                }
                return _added;
            }
        } 

        /// Set of strokes that where removed, result may be an empty collection 
        public StrokeCollection Removed 
        {
            get 
            {
                if ( _removed == null )
                {
                    _removed = new StrokeCollection.ReadOnlyStrokeCollection(new StrokeCollection()); 
                }
                return _removed; 
            } 
        }
 
        /// 
        /// The zero based starting index that was affected
        /// 
        internal int Index 
        {
            get 
            { 
                return _index;
            } 
        }
    }

    // =========================================================================================== 
    /// 
    /// delegate used for event handlers that are called when a change to the drawing attributes associated with one or more strokes has occurred. 
    ///  
    public delegate void PropertyDataChangedEventHandler(object sender, PropertyDataChangedEventArgs e);
 
    /// 
    /// Event arg used a change to the drawing attributes associated with one or more strokes has occurred.
    /// 
    public class PropertyDataChangedEventArgs : EventArgs 
    {
        private Guid _propertyGuid; 
        private object _newValue; 
        private object _previousValue;
 
        /// Constructor
        public PropertyDataChangedEventArgs(Guid propertyGuid,
                                            object newValue,
                                            object previousValue) 
        {
            if ( newValue == null && previousValue == null ) 
            { 
                throw new ArgumentException(SR.Get(SRID.CannotBothBeNull, "newValue", "previousValue"));
            } 

            _propertyGuid = propertyGuid;
            _newValue = newValue;
            _previousValue = previousValue; 
        }
 
        ///  
        /// Gets the property guid that represents the DrawingAttribute that changed
        ///  
        public Guid PropertyGuid
        {
            get { return _propertyGuid; }
        } 

        ///  
        /// Gets the new value of the DrawingAttribute 
        /// 
        public object NewValue 
        {
            get { return _newValue; }
        }
 
        /// 
        /// Gets the previous value of the DrawingAttribute 
        ///  
        public object PreviousValue
        { 
            get { return _previousValue; }
        }
    }
 

 
    // =========================================================================================== 
    /// 
    /// delegate used for event handlers that are called when the Custom attributes associated with an object have changed. 
    /// 
    internal delegate void ExtendedPropertiesChangedEventHandler(object sender, ExtendedPropertiesChangedEventArgs e);

    ///  
    /// Event Arg used when the Custom attributes associated with an object have changed.
    ///  
    internal class ExtendedPropertiesChangedEventArgs : EventArgs 
    {
        private ExtendedProperty _oldProperty; 
        private ExtendedProperty _newProperty;

        /// Constructor
        internal ExtendedPropertiesChangedEventArgs(ExtendedProperty oldProperty, 
                                                    ExtendedProperty newProperty)
        { 
            if ( oldProperty == null && newProperty == null ) 
            {
                throw new ArgumentNullException("oldProperty"); 
            }
            _oldProperty = oldProperty;
            _newProperty = newProperty;
        } 

        ///  
        /// The value of the previous property.  If the Changed event was caused 
        /// by an ExtendedProperty being added, this value is null
        ///  
        internal ExtendedProperty OldProperty
        {
            get { return _oldProperty; }
        } 

        ///  
        /// The value of the new property.  If the Changed event was caused by 
        /// an ExtendedProperty being removed, this value is null
        ///  
        internal ExtendedProperty NewProperty
        {
            get { return _newProperty; }
        } 
    }
 
    ///  
    /// The delegate to use for the DefaultDrawingAttributesReplaced event
    ///  
    public delegate void DrawingAttributesReplacedEventHandler(object sender, DrawingAttributesReplacedEventArgs e);

    /// 
    ///    DrawingAttributesReplacedEventArgs 
    /// 
    public class DrawingAttributesReplacedEventArgs : EventArgs 
    { 
        /// 
        /// DrawingAttributesReplacedEventArgs 
        /// 
        /// 
        /// This must be public so InkCanvas can instance it
        ///  
        public DrawingAttributesReplacedEventArgs(DrawingAttributes newDrawingAttributes, DrawingAttributes previousDrawingAttributes)
        { 
            if ( newDrawingAttributes == null ) 
            {
                throw new ArgumentNullException("newDrawingAttributes"); 
            }
            if ( previousDrawingAttributes == null )
            {
                throw new ArgumentNullException("previousDrawingAttributes"); 
            }
            _newDrawingAttributes = newDrawingAttributes; 
            _previousDrawingAttributes = previousDrawingAttributes; 
        }
 
        /// 
        /// [TBS]
        /// 
        public DrawingAttributes NewDrawingAttributes 
        {
            get { return _newDrawingAttributes; } 
        } 

        ///  
        /// [TBS]
        /// 
        public DrawingAttributes PreviousDrawingAttributes
        { 
            get { return _previousDrawingAttributes; }
        } 
 
        private DrawingAttributes _newDrawingAttributes;
        private DrawingAttributes _previousDrawingAttributes; 

    }

    ///  
    /// The delegate to use for the StylusPointsReplaced event
    ///  
    public delegate void StylusPointsReplacedEventHandler(object sender, StylusPointsReplacedEventArgs e); 

    ///  
    ///    StylusPointsReplacedEventArgs
    /// 
    public class StylusPointsReplacedEventArgs : EventArgs
    { 
        /// 
        /// StylusPointsReplacedEventArgs 
        ///  
        /// 
        /// This must be public so InkCanvas can instance it 
        /// 
        public StylusPointsReplacedEventArgs(StylusPointCollection newStylusPoints, StylusPointCollection previousStylusPoints)
        {
            if ( newStylusPoints == null ) 
            {
                throw new ArgumentNullException("newStylusPoints"); 
            } 
            if ( previousStylusPoints == null )
            { 
                throw new ArgumentNullException("previousStylusPoints");
            }
            _newStylusPoints = newStylusPoints;
            _previousStylusPoints = previousStylusPoints; 
        }
 
        ///  
        /// [TBS]
        ///  
        public StylusPointCollection NewStylusPoints
        {
            get { return _newStylusPoints; }
        } 

        ///  
        /// [TBS] 
        /// 
        public StylusPointCollection PreviousStylusPoints 
        {
            get { return _previousStylusPoints; }
        }
 
        private StylusPointCollection _newStylusPoints;
        private StylusPointCollection _previousStylusPoints; 
 
    }
 
    #endregion
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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Events.cs source code in C# .NET

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