EditBehavior.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Framework / MS / Internal / Ink / EditBehavior.cs / 1 / EditBehavior.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// File: EditingBehavior.cs
//
// Description: 
// Base EditingBehavior for InkCanvas
// Features: 
// 
// History:
//  4/29/2003 waynezen:     Rewrote for mid-stroke support 
//  3/15/2003 samgeo:       Created
//
// Copyright (C) 2003 by Microsoft Corporation.  All rights reserved.
// 
//---------------------------------------------------------------------------
using System; 
using System.ComponentModel; 
using System.ComponentModel.Design;
using System.Collections; 
using System.Collections.Generic;
using System.Diagnostics;
using System.Windows.Input;
using System.Windows; 
using System.Windows.Controls;
using System.Windows.Controls.Primitives; 
using System.Windows.Data; 
using System.Windows.Documents;
using System.Windows.Interop; 
using System.Windows.Navigation;
using System.Windows.Media;

namespace MS.Internal.Ink 
{
    ///  
    /// Base class for all EditingBehaviors in the InkCanvas 
    /// Please see the design detain at http://tabletpc/longhorn/Specs/Mid-Stroke%20and%20Pen%20Cursor%20Dev%20Design.mht
    ///  
    internal abstract class EditingBehavior
    {

        //------------------------------------------------------------------------------- 
        //
        // Constructors 
        // 
        //-------------------------------------------------------------------------------
 
        #region Constructors

        /// 
        /// Constructor 
        /// 
        /// EditngCoordinator instance 
        /// InkCanvas instance 
        internal EditingBehavior(EditingCoordinator editingCoordinator, InkCanvas inkCanvas)
        { 
            if (inkCanvas == null)
            {
                throw new ArgumentNullException("inkCanvas");
            } 
            if (editingCoordinator == null)
            { 
                throw new ArgumentNullException("editingCoordinator"); 
            }
            _inkCanvas = inkCanvas; 
            _editingCoordinator = editingCoordinator;
        }

        #endregion Constructors 

        //-------------------------------------------------------------------------------- 
        // 
        // Public Methods
        // 
        //-------------------------------------------------------------------------------

        #region Public Methods
 
        /// 
        /// An internal method which should be called from: 
        ///     EditingCoordinator.PushEditingBehavior 
        ///     EditingCoordinator.PopEditingBehavior
        /// The mehod's called when the behavior switching occurs. 
        /// 
        public void Activate()
        {
            // Debug verification which will never be compiled into release bits. 
            EditingCoordinator.DebugCheckActiveBehavior(this);
 
            // Invoke the virtual OnActivate method. 
            OnActivate();
        } 

        /// 
        /// An internal method which should be called from:
        ///     EditingCoordinator.PushEditingBehavior 
        ///     EditingCoordinator.PopEditingBehavior
        /// The mehod's called when the behavior switching occurs. 
        ///  
        public void Deactivate()
        { 
            // Debug verification which will never be compiled into release bits.
            EditingCoordinator.DebugCheckActiveBehavior(this);

            // Invoke the virtual OnDeactivate method. 
            OnDeactivate();
        } 
 
        /// 
        /// An internal method which should be called from: 
        ///     EditingCoordinator.OnInkCanvasStylusUp
        ///     EditingCoordinator.OnInkCanvasLostStylusCapture
        ///     EditingCoordinator.UpdateEditingState
        /// The mehod's called when the current editing state is committed or discarded. 
        /// 
        /// A flag which indicates either editing is committed or discarded 
        public void Commit(bool commit) 
        {
            // Debug verification which will never be compiled into release bits. 
            EditingCoordinator.DebugCheckActiveBehavior(this);

            // Invoke the virtual OnCommit method.
            OnCommit(commit); 
        }
 
        ///  
        /// UpdateTransform
        ///     Called by: EditingCoordinator.InvalidateBehaviorCursor 
        /// 
        public void UpdateTransform()
        {
            if ( !EditingCoordinator.IsTransformValid(this) ) 
            {
                OnTransformChanged(); 
            } 
        }
 
        #endregion Public Methods

        //--------------------------------------------------------------------------------
        // 
        // Public Properties
        // 
        //-------------------------------------------------------------------------------- 

        #region Public Properties 

        /// 
        /// Retrieve the cursor which is associated to this behavior.
        /// The method which should be called from: 
        ///     EditingCoordinator.InvalidateCursor
        ///     EditingCoordinator.PushEditingBehavior 
        ///     EditingCoordinator.PopEditingBehavior 
        /// 
        /// The current cursor 
        public Cursor Cursor
        {
            get
            { 
                // If the cursor instance hasn't been created or is dirty, we will create a new instance.
                if ( _cachedCursor == null || !EditingCoordinator.IsCursorValid(this) ) 
                { 
                    // Invoke the virtual method to get cursor. Then cache it.
                    _cachedCursor = GetCurrentCursor(); 
                }

                return _cachedCursor;
            } 
        }
 
        #endregion Public Properties 

        //------------------------------------------------------------------------------- 
        //
        // Protected Methods
        //
        //-------------------------------------------------------------------------------- 

        #region Protected Methods 
 
        /// 
        /// Called when the EditingBehavior is activated.  EditingBehaviors 
        /// should register for event handlers in this call
        /// Called from:
        ///     EditingBehavior.Activate
        ///  
        protected abstract void OnActivate();
 
        ///  
        /// Called when the EditingBehavior is deactivated.  EditingBehaviors
        /// should unregister from event handlers in this call 
        /// Called from:
        ///     EditingBehavior.Deactivate
        /// 
        protected abstract void OnDeactivate(); 

        ///  
        /// Called when the user editing is committed or discarded. 
        /// Called from:
        ///     EditingBehavior.Commit 
        /// 
        /// A flag which indicates either editing is committed or discarded
        protected abstract void OnCommit(bool commit);
 
        /// 
        /// Called when the new cursor instance is required. 
        /// Called from: 
        ///     EditingBehavior.GetCursor
        ///  
        /// 
        protected abstract Cursor GetCurrentCursor();

        ///  
        /// Unload the dynamic behavior. The method should be only called from:
        ///     SelectionEditingBehavior 
        ///     LassoSelectionBehavior 
        /// 
        protected void SelfDeactivate() 
        {
            EditingCoordinator.DeactivateDynamicBehavior();
        }
 
        /// 
        /// Calculate the transform which is accumalated with the InkCanvas' XXXTransform properties. 
        ///  
        /// 
        protected Matrix GetElementTransformMatrix() 
        {
            Transform layoutTransform = this.InkCanvas.LayoutTransform;
            Transform renderTransform = this.InkCanvas.RenderTransform;
            Matrix xf = layoutTransform.Value; 
            xf *= renderTransform.Value;
 
            return xf; 
        }
 
        /// 
        /// OnTransformChanged
        /// 
        protected virtual void OnTransformChanged() 
        {
            // Defer to derived. 
        } 

        #endregion Protected Methods 

        //-------------------------------------------------------------------------------
        //
        // Protected Properties 
        //
        //------------------------------------------------------------------------------- 
 
        #region Protected Properties
 
        /// 
        /// Provides access to the InkCanvas this EditingBehavior is attached to
        /// 
        ///  
        protected InkCanvas InkCanvas
        { 
            get { return _inkCanvas; } 
        }
 
        /// 
        /// Provides access to the EditingStack this EditingBehavior is on
        /// 
        ///  
        protected EditingCoordinator EditingCoordinator
        { 
            get { return _editingCoordinator; } 
        }
 
        #endregion Protected Properties


        //------------------------------------------------------------------------------- 
        //
        // Protected Fields 
        // 
        //--------------------------------------------------------------------------------
 
        #region Private Fields

        /// 
        /// The InkCanvas this EditingBehavior is operating on 
        /// 
        private InkCanvas           _inkCanvas; 
 
        /// 
        /// The EditingStack this EditingBehavior is on 
        /// 
        private EditingCoordinator  _editingCoordinator;

        ///  
        /// Fields related to the cursor
        ///  
        private Cursor              _cachedCursor; 

        #endregion Private Fields 

    }

} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//---------------------------------------------------------------------------- 
//
// File: EditingBehavior.cs
//
// Description: 
// Base EditingBehavior for InkCanvas
// Features: 
// 
// History:
//  4/29/2003 waynezen:     Rewrote for mid-stroke support 
//  3/15/2003 samgeo:       Created
//
// Copyright (C) 2003 by Microsoft Corporation.  All rights reserved.
// 
//---------------------------------------------------------------------------
using System; 
using System.ComponentModel; 
using System.ComponentModel.Design;
using System.Collections; 
using System.Collections.Generic;
using System.Diagnostics;
using System.Windows.Input;
using System.Windows; 
using System.Windows.Controls;
using System.Windows.Controls.Primitives; 
using System.Windows.Data; 
using System.Windows.Documents;
using System.Windows.Interop; 
using System.Windows.Navigation;
using System.Windows.Media;

namespace MS.Internal.Ink 
{
    ///  
    /// Base class for all EditingBehaviors in the InkCanvas 
    /// Please see the design detain at http://tabletpc/longhorn/Specs/Mid-Stroke%20and%20Pen%20Cursor%20Dev%20Design.mht
    ///  
    internal abstract class EditingBehavior
    {

        //------------------------------------------------------------------------------- 
        //
        // Constructors 
        // 
        //-------------------------------------------------------------------------------
 
        #region Constructors

        /// 
        /// Constructor 
        /// 
        /// EditngCoordinator instance 
        /// InkCanvas instance 
        internal EditingBehavior(EditingCoordinator editingCoordinator, InkCanvas inkCanvas)
        { 
            if (inkCanvas == null)
            {
                throw new ArgumentNullException("inkCanvas");
            } 
            if (editingCoordinator == null)
            { 
                throw new ArgumentNullException("editingCoordinator"); 
            }
            _inkCanvas = inkCanvas; 
            _editingCoordinator = editingCoordinator;
        }

        #endregion Constructors 

        //-------------------------------------------------------------------------------- 
        // 
        // Public Methods
        // 
        //-------------------------------------------------------------------------------

        #region Public Methods
 
        /// 
        /// An internal method which should be called from: 
        ///     EditingCoordinator.PushEditingBehavior 
        ///     EditingCoordinator.PopEditingBehavior
        /// The mehod's called when the behavior switching occurs. 
        /// 
        public void Activate()
        {
            // Debug verification which will never be compiled into release bits. 
            EditingCoordinator.DebugCheckActiveBehavior(this);
 
            // Invoke the virtual OnActivate method. 
            OnActivate();
        } 

        /// 
        /// An internal method which should be called from:
        ///     EditingCoordinator.PushEditingBehavior 
        ///     EditingCoordinator.PopEditingBehavior
        /// The mehod's called when the behavior switching occurs. 
        ///  
        public void Deactivate()
        { 
            // Debug verification which will never be compiled into release bits.
            EditingCoordinator.DebugCheckActiveBehavior(this);

            // Invoke the virtual OnDeactivate method. 
            OnDeactivate();
        } 
 
        /// 
        /// An internal method which should be called from: 
        ///     EditingCoordinator.OnInkCanvasStylusUp
        ///     EditingCoordinator.OnInkCanvasLostStylusCapture
        ///     EditingCoordinator.UpdateEditingState
        /// The mehod's called when the current editing state is committed or discarded. 
        /// 
        /// A flag which indicates either editing is committed or discarded 
        public void Commit(bool commit) 
        {
            // Debug verification which will never be compiled into release bits. 
            EditingCoordinator.DebugCheckActiveBehavior(this);

            // Invoke the virtual OnCommit method.
            OnCommit(commit); 
        }
 
        ///  
        /// UpdateTransform
        ///     Called by: EditingCoordinator.InvalidateBehaviorCursor 
        /// 
        public void UpdateTransform()
        {
            if ( !EditingCoordinator.IsTransformValid(this) ) 
            {
                OnTransformChanged(); 
            } 
        }
 
        #endregion Public Methods

        //--------------------------------------------------------------------------------
        // 
        // Public Properties
        // 
        //-------------------------------------------------------------------------------- 

        #region Public Properties 

        /// 
        /// Retrieve the cursor which is associated to this behavior.
        /// The method which should be called from: 
        ///     EditingCoordinator.InvalidateCursor
        ///     EditingCoordinator.PushEditingBehavior 
        ///     EditingCoordinator.PopEditingBehavior 
        /// 
        /// The current cursor 
        public Cursor Cursor
        {
            get
            { 
                // If the cursor instance hasn't been created or is dirty, we will create a new instance.
                if ( _cachedCursor == null || !EditingCoordinator.IsCursorValid(this) ) 
                { 
                    // Invoke the virtual method to get cursor. Then cache it.
                    _cachedCursor = GetCurrentCursor(); 
                }

                return _cachedCursor;
            } 
        }
 
        #endregion Public Properties 

        //------------------------------------------------------------------------------- 
        //
        // Protected Methods
        //
        //-------------------------------------------------------------------------------- 

        #region Protected Methods 
 
        /// 
        /// Called when the EditingBehavior is activated.  EditingBehaviors 
        /// should register for event handlers in this call
        /// Called from:
        ///     EditingBehavior.Activate
        ///  
        protected abstract void OnActivate();
 
        ///  
        /// Called when the EditingBehavior is deactivated.  EditingBehaviors
        /// should unregister from event handlers in this call 
        /// Called from:
        ///     EditingBehavior.Deactivate
        /// 
        protected abstract void OnDeactivate(); 

        ///  
        /// Called when the user editing is committed or discarded. 
        /// Called from:
        ///     EditingBehavior.Commit 
        /// 
        /// A flag which indicates either editing is committed or discarded
        protected abstract void OnCommit(bool commit);
 
        /// 
        /// Called when the new cursor instance is required. 
        /// Called from: 
        ///     EditingBehavior.GetCursor
        ///  
        /// 
        protected abstract Cursor GetCurrentCursor();

        ///  
        /// Unload the dynamic behavior. The method should be only called from:
        ///     SelectionEditingBehavior 
        ///     LassoSelectionBehavior 
        /// 
        protected void SelfDeactivate() 
        {
            EditingCoordinator.DeactivateDynamicBehavior();
        }
 
        /// 
        /// Calculate the transform which is accumalated with the InkCanvas' XXXTransform properties. 
        ///  
        /// 
        protected Matrix GetElementTransformMatrix() 
        {
            Transform layoutTransform = this.InkCanvas.LayoutTransform;
            Transform renderTransform = this.InkCanvas.RenderTransform;
            Matrix xf = layoutTransform.Value; 
            xf *= renderTransform.Value;
 
            return xf; 
        }
 
        /// 
        /// OnTransformChanged
        /// 
        protected virtual void OnTransformChanged() 
        {
            // Defer to derived. 
        } 

        #endregion Protected Methods 

        //-------------------------------------------------------------------------------
        //
        // Protected Properties 
        //
        //------------------------------------------------------------------------------- 
 
        #region Protected Properties
 
        /// 
        /// Provides access to the InkCanvas this EditingBehavior is attached to
        /// 
        ///  
        protected InkCanvas InkCanvas
        { 
            get { return _inkCanvas; } 
        }
 
        /// 
        /// Provides access to the EditingStack this EditingBehavior is on
        /// 
        ///  
        protected EditingCoordinator EditingCoordinator
        { 
            get { return _editingCoordinator; } 
        }
 
        #endregion Protected Properties


        //------------------------------------------------------------------------------- 
        //
        // Protected Fields 
        // 
        //--------------------------------------------------------------------------------
 
        #region Private Fields

        /// 
        /// The InkCanvas this EditingBehavior is operating on 
        /// 
        private InkCanvas           _inkCanvas; 
 
        /// 
        /// The EditingStack this EditingBehavior is on 
        /// 
        private EditingCoordinator  _editingCoordinator;

        ///  
        /// Fields related to the cursor
        ///  
        private Cursor              _cachedCursor; 

        #endregion Private Fields 

    }

} 

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

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