Events.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Ink / Events.cs / 1305600 / Events.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// File: Events.cs
//
// Description: 
//      Defined our Delegates, EventHandlers and EventArgs
// 
// Authors: samgeo 
//
// Copyright (C) 2003 by Microsoft Corporation.  All rights reserved. 
//
//---------------------------------------------------------------------------
using System;
using System.Collections; 
using System.Collections.Generic;
using System.Collections.ObjectModel; 
using System.ComponentModel; 
using System.Windows;
using System.Windows.Media; 
using System.Windows.Documents;
using System.Windows.Ink;
using Swi = System.Windows.Ink;
using MS.Utility; 

namespace System.Windows.Controls 
{ 
    /// 
    /// The delegate to use for the StrokeCollected event 
    /// 
    public delegate void InkCanvasStrokeCollectedEventHandler(object sender, InkCanvasStrokeCollectedEventArgs e);

    ///  
    ///    InkCanvasStrokeCollectedEventArgs
    ///  
    public class InkCanvasStrokeCollectedEventArgs : RoutedEventArgs 
    {
        ///  
        /// [TBS]
        /// 
        public InkCanvasStrokeCollectedEventArgs(Swi.Stroke stroke) : base(InkCanvas.StrokeCollectedEvent)
        { 
            if (stroke == null)
            { 
                throw new ArgumentNullException("stroke"); 
            }
            _stroke = stroke; 
        }

        /// 
        /// [TBS] 
        /// 
        public Swi.Stroke Stroke 
        { 
            get { return _stroke; }
        } 

        /// 
        ///     The mechanism used to call the type-specific handler on the
        ///     target. 
        /// 
        ///  
        ///     The generic handler to call in a type-specific way. 
        /// 
        ///  
        ///     The target to call the handler on.
        /// 
        protected override void InvokeEventHandler(Delegate genericHandler, object genericTarget)
        { 
            InkCanvasStrokeCollectedEventHandler handler = (InkCanvasStrokeCollectedEventHandler)genericHandler;
            handler(genericTarget, this); 
        } 

        private Swi.Stroke _stroke; 
    }

    /// 
    /// The delegate to use for the StrokesChanged event 
    /// 
    public delegate void InkCanvasStrokesReplacedEventHandler(object sender, InkCanvasStrokesReplacedEventArgs e); 
 
    /// 
    ///    InkCanvasStrokesChangedEventArgs 
    /// 
    public class InkCanvasStrokesReplacedEventArgs : EventArgs
    {
        ///  
        /// InkCanvasStrokesReplacedEventArgs
        ///  
        internal InkCanvasStrokesReplacedEventArgs(Swi.StrokeCollection newStrokes, Swi.StrokeCollection previousStrokes) 
        {
            if (newStrokes == null) 
            {
                throw new ArgumentNullException("newStrokes");
            }
            if (previousStrokes == null) 
            {
                throw new ArgumentNullException("previousStrokes"); 
            } 
            _newStrokes = newStrokes;
            _previousStrokes = previousStrokes; 
        }

        /// 
        /// [TBS] 
        /// 
        public Swi.StrokeCollection NewStrokes 
        { 
            get { return _newStrokes; }
        } 

        /// 
        /// [TBS]
        ///  
        public Swi.StrokeCollection PreviousStrokes
        { 
            get { return _previousStrokes; } 
        }
 
        private Swi.StrokeCollection _newStrokes;
        private Swi.StrokeCollection _previousStrokes;

    } 

    ///  
    ///     The delegate to use for the SelectionChanging event 
    ///
    ///     This event is only thrown when you change the selection programmatically (through our APIs, not the SelectionService's 
    ///     or through our lasso selection behavior
    /// 
    public delegate void InkCanvasSelectionChangingEventHandler(object sender, InkCanvasSelectionChangingEventArgs e);
 
    /// 
    /// Event arguments sent when the SelectionChanging event is raised. 
    ///  
    public class InkCanvasSelectionChangingEventArgs : CancelEventArgs
    { 
        private StrokeCollection        _strokes;
        private List         _elements;
        private bool                    _strokesChanged;
        private bool                    _elementsChanged; 

        ///  
        /// Constructor 
        /// 
        internal InkCanvasSelectionChangingEventArgs(StrokeCollection selectedStrokes, IEnumerable selectedElements) 
        {
            if (selectedStrokes == null)
            {
                throw new ArgumentNullException("selectedStrokes"); 
            }
            if (selectedElements == null) 
            { 
                throw new ArgumentNullException("selectedElements");
            } 
            _strokes = selectedStrokes;
            List elements =
                new List(selectedElements);
            _elements = elements; 

            _strokesChanged = false; 
            _elementsChanged = false; 
        }
 
        /// 
        /// An internal flag which indicates the Strokes has changed.
        /// 
        internal bool StrokesChanged 
        {
            get 
            { 
                return _strokesChanged;
            } 
        }

        /// 
        /// An internal flag which indicates the Elements has changed. 
        /// 
        internal bool ElementsChanged 
        { 
            get
            { 
                return _elementsChanged;
            }
        }
 
        /// 
        /// Set the selected elements 
        ///  
        /// The new selected elements
        public void SetSelectedElements(IEnumerable selectedElements) 
        {
            if ( selectedElements == null )
            {
                throw new ArgumentNullException("selectedElements"); 
            }
 
            List elements = 
                new List(selectedElements);
            _elements = elements; 
            _elementsChanged = true;
        }

        ///  
        /// Get the selected elements
        ///  
        /// The selected elements 
        public ReadOnlyCollection GetSelectedElements()
        { 
            return new ReadOnlyCollection(_elements);
        }

        ///  
        /// Set the selected strokes
        ///  
        /// The new selected strokes 
        public void SetSelectedStrokes(StrokeCollection selectedStrokes)
        { 
            if ( selectedStrokes == null )
            {
                throw new ArgumentNullException("selectedStrokes");
            } 

            _strokes = selectedStrokes; 
            _strokesChanged = true; 
        }
 
        /// 
        /// Get the selected strokes
        /// 
        /// The selected strokes 
        public StrokeCollection GetSelectedStrokes()
        { 
            // 
            // make a copy of out internal collection.
            // 
            StrokeCollection sc = new StrokeCollection();
            sc.Add(_strokes);
            return sc;
        } 
    }
 
 
    /// 
    ///     The delegate to use for the SelectionMoving, SelectionResizing events 
    /// 
    public delegate void  InkCanvasSelectionEditingEventHandler(object sender,  InkCanvasSelectionEditingEventArgs e);

    ///  
    /// Event arguments sent when the SelectionChanging event is raised.
    ///  
    public class  InkCanvasSelectionEditingEventArgs : CancelEventArgs 
    {
        private Rect _oldRectangle; 
        private Rect _newRectangle;
        /// 
        /// Constructor
        ///  
        internal  InkCanvasSelectionEditingEventArgs(Rect oldRectangle, Rect newRectangle)
        { 
            _oldRectangle = oldRectangle; 
            _newRectangle = newRectangle;
        } 

        /// 
        /// Read access to the OldRectangle, from before the edit.
        ///  
        public Rect OldRectangle
        { 
            get { return _oldRectangle;} 
        }
 
        /// 
        /// Read access to the NewRectangle, resulting from this edit.
        /// 
        public Rect NewRectangle 
        {
            get { return _newRectangle;} 
            set {_newRectangle = value;} 
        }
    } 

    /// 
    ///     The delegate to use for the InkErasing event
    ///  
    public delegate void InkCanvasStrokeErasingEventHandler(object sender, InkCanvasStrokeErasingEventArgs e);
 
    ///  
    /// Event arguments sent when the SelectionChanging event is raised.
    ///  
    public class InkCanvasStrokeErasingEventArgs : CancelEventArgs
    {
        private Swi.Stroke _stroke;
        ///  
        /// Constructor
        ///  
        internal InkCanvasStrokeErasingEventArgs(Swi.Stroke stroke) 
        {
            if (stroke == null) 
            {
                throw new ArgumentNullException("stroke");
            }
            _stroke = stroke; 
        }
 
        ///  
        /// Read access to the stroke about to be deleted
        ///  
        public Stroke Stroke
        {
            get { return _stroke;}
        } 
    }
 
    ///  
    /// TBD
    ///  
    /// sender
    /// e
    public delegate void InkCanvasGestureEventHandler(object sender, InkCanvasGestureEventArgs e);
 
    /// 
    /// ApplicationGestureEventArgs 
    ///  
    public class InkCanvasGestureEventArgs : RoutedEventArgs
    { 
        private StrokeCollection _strokes;
        private List _gestureRecognitionResults;
        private bool                _cancel;
 
        /// 
        /// TBD 
        ///  
        /// strokes
        /// gestureRecognitionResults 
        public InkCanvasGestureEventArgs(StrokeCollection strokes, IEnumerable gestureRecognitionResults)
            : base(InkCanvas.GestureEvent)
        {
            if (strokes == null) 
            {
                throw new ArgumentNullException("strokes"); 
            } 
            if (strokes.Count < 1)
            { 
                throw new ArgumentException(SR.Get(SRID.InvalidEmptyStrokeCollection), "strokes");
            }
            if (gestureRecognitionResults == null)
            { 
                throw new ArgumentNullException("strokes");
            } 
            List results = 
                new List(gestureRecognitionResults);
            if (results.Count == 0) 
            {
                throw new ArgumentException(SR.Get(SRID.InvalidEmptyArray), "gestureRecognitionResults");
            }
            _strokes = strokes; 
            _gestureRecognitionResults = results;
        } 
 
        /// 
        /// TBD 
        /// 
        public StrokeCollection Strokes
        {
            get { return _strokes; } 
        }
 
        ///  
        /// TBD
        ///  
        /// 
        public ReadOnlyCollection GetGestureRecognitionResults()
        {
            return new ReadOnlyCollection(_gestureRecognitionResults); 
        }
 
        ///  
        /// Indicates whether the Gesture event needs to be cancelled.
        ///  
        public bool Cancel
        {
            get
            { 
                return _cancel;
            } 
 
            set
            { 
                _cancel = value;
            }
        }
 
        /// 
        ///     The mechanism used to call the type-specific handler on the 
        ///     target. 
        /// 
        ///  
        ///     The generic handler to call in a type-specific way.
        /// 
        /// 
        ///     The target to call the handler on. 
        /// 
        protected override void InvokeEventHandler(Delegate genericHandler, object genericTarget) 
        { 
            InkCanvasGestureEventHandler handler = (InkCanvasGestureEventHandler)genericHandler;
            handler(genericTarget, this); 
        }


    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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