ModelVisual3D.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media3D / ModelVisual3D.cs / 1305600 / ModelVisual3D.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (c) Microsoft Corporation.  All rights reserved.
//  
//
// Description: 
// 
// History:
//  6/9/2005 : [....] - Created 
//
//---------------------------------------------------------------------------

using MS.Internal; 
using MS.Internal.Media;
using MS.Internal.Media3D; 
using System; 
using System.Diagnostics;
using System.Collections.Specialized; 
using System.ComponentModel;
using System.Security;
using System.Windows.Media.Composition;
using System.Windows.Markup; 

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

namespace System.Windows.Media.Media3D 
{
    /// 
    ///     ModelVisual3D is a Visual3D which draws the given Model3D.
    ///     ModelVisual3D is usable from Xaml. 
    /// 
    [ContentProperty("Children")] 
    public class ModelVisual3D : Visual3D, IAddChild 
    {
        //----------------------------------------------------- 
        //
        //  Constructors
        //
        //----------------------------------------------------- 

        #region Constructors 
 
        /// 
        ///     Default ctor 
        /// 
        public ModelVisual3D()
        {
            _children = new Visual3DCollection(this); 
        }
 
        #endregion Constructors 

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

        #region Public Methods 
 
        /// 
        ///   Derived class must implement to support Visual children. The method must return 
        ///    the child at the specified index. Index must be between 0 and GetVisualChildrenCount-1.
        ///
        ///    By default a Visual does not have any children.
        /// 
        ///  Remark:
        ///       During this virtual call it is not valid to modify the Visual tree. 
        ///  
        protected sealed override Visual3D GetVisual3DChild(int index)
        { 
            //VisualCollection does the range check for index
            return _children[index];
        }
 
        /// 
        ///  Derived classes override this property to enable the Visual code to enumerate 
        ///  the Visual children. Derived classes need to return the number of children 
        ///  from this method.
        /// 
        ///    By default a Visual does not have any children.
        ///
        ///  Remark: During this virtual method the Visual tree must not be modified.
        ///  
        protected sealed override int Visual3DChildrenCount
        { 
            get { return _children.Count; } 
        }
 
        void IAddChild.AddChild(Object value)
        {
            if( value == null )
            { 
                throw new System.ArgumentNullException("value");
            } 
 
            Visual3D visual3D = value as Visual3D;
 
            if (visual3D == null)
            {
                throw new System.ArgumentException(SR.Get(SRID.Collection_BadType, this.GetType().Name, value.GetType().Name, typeof(Visual3D).Name));
            } 

            Children.Add(visual3D); 
        } 

        void IAddChild.AddText(string text) 
        {
            // The only text we accept is whitespace, which we ignore.
            foreach (char c in text)
            { 
                if (!Char.IsWhiteSpace(c))
                { 
                    throw new System.InvalidOperationException(SR.Get(SRID.AddText_Invalid, this.GetType().Name)); 
                }
            } 
        }

        /// 
        ///     Children of this Visual3D 
        /// 
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] 
        public Visual3DCollection Children 
        {
            get 
            {
                VerifyAPIReadOnly();

                return _children; 
            }
        } 
 
        /// 
        ///    DependencyProperty which backs the ModelVisual3D.Content property. 
        /// 
        public static readonly DependencyProperty ContentProperty =
            DependencyProperty.Register(
                    "Content", 
                    /* propertyType = */ typeof(Model3D),
                    /* ownerType = */ typeof(ModelVisual3D), 
                    new PropertyMetadata(ContentPropertyChanged), 
                    (ValidateValueCallback) delegate { return MediaContext.CurrentMediaContext.WriteAccessEnabled; });
 
        private static void ContentPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            ModelVisual3D owner = ((ModelVisual3D) d);
 
            // if it's not a subproperty change, then we need to change the protected Model property of Visual3D
            if (!e.IsASubPropertyChange) 
            { 
                owner.Visual3DModel = (Model3D)e.NewValue;
            } 
        }

        /// 
        ///     The Model3D to render 
        /// 
        public Model3D Content 
        { 
            get
            { 
                return (Model3D) GetValue(ContentProperty);
            }

            set 
            {
                SetValue(ContentProperty, value); 
            } 
        }
 

        /// For binary compatability we need to keep the Transform DP and proprety here
        public static new readonly DependencyProperty TransformProperty = Visual3D.TransformProperty;
 
        /// 
        ///     Transform for this Visual3D. 
        ///  
        public new Transform3D Transform
        { 
            get
            {
                return (Transform3D) GetValue(TransformProperty);
            } 

            set 
            { 
                SetValue(TransformProperty, value);
            } 
        }

        #endregion Public Methods
 
        //------------------------------------------------------
        // 
        //  Public Properties 
        //
        //------------------------------------------------------ 

        //-----------------------------------------------------
        //
        //  Public Events 
        //
        //------------------------------------------------------ 
 
        //-----------------------------------------------------
        // 
        //  Internal Methods
        //
        //-----------------------------------------------------
 
        //-----------------------------------------------------
        // 
        //  Private Fields 
        //
        //------------------------------------------------------ 

        #region Private Fields

        private readonly Visual3DCollection _children; 

        #endregion Private Fields 
 
        //-----------------------------------------------------
        // 
        //  Internal Fields
        //
        //------------------------------------------------------
 
        #region Internal Fields
 
        #endregion Internal Fields 

    } 
}


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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