Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Controls / ViewPort3D.cs / 2 / ViewPort3D.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // // File: Viewport3D.cs // // Description: Viewport3D element is a UIElement that contains a 3D // scene and a camera that defines the scene's projection into the 2D // rectangle of the control. // // History: // 11/17/2003 : [....] - created. // //--------------------------------------------------------------------------- using MS.Internal; using MS.Internal.KnownBoxes; using System; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Diagnostics; using System.Windows; using System.Windows.Automation.Peers; using System.Windows.Media; using System.Windows.Media.Media3D; using System.Windows.Markup; using System.Windows.Threading; namespace System.Windows.Controls { ////// The Viewport3D provides the Camera and layout bounds /// required to project the Visual3Ds into 2D. The Viewport3D /// is the bridge between 2D visuals and 3D. /// [ContentProperty("Children")] [Localizability(LocalizationCategory.NeverLocalize)] public class Viewport3D : FrameworkElement, IAddChild { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors static Viewport3D() { // Viewport3Ds do not really have a "Desired Bounds" since the // camera frustum is scaled to the width of the viewport rect. // As a result, layout never imposes a clip on Viewport3D. // // This makes it very easy to render Visual3Ds outside of the // layout bounds. Most framework users find this surprising. // As a result, we clip Viewport3Ds to bounds by default. ClipToBoundsProperty.OverrideMetadata(typeof(Viewport3D), new PropertyMetadata(BooleanBoxes.TrueBox)); } ////// Viewport3D Constructor /// public Viewport3D() { _viewport3DVisual = new Viewport3DVisual(); // The value for the Camera property and the Children property on Viewport3D // will also be the value for these properties on the Viewport3DVisual we // create as an internal Visual child. This then will cause these values to // be shared, which will break property inheritance, dynamic resource references // and databinding. To prevent this, we mark the internal // Viewport3DVisual.CanBeInheritanceContext to be false, allowing Camera and // Children to only pick up value context from the Viewport3D (this). _viewport3DVisual.CanBeInheritanceContext = false; this.AddVisualChild(_viewport3DVisual); // SetValue(ChildrenPropertyKey, _viewport3DVisual.Children); _viewport3DVisual.SetInheritanceContextForChildren(this); } #endregion //------------------------------------------------------ // // Public properties // //----------------------------------------------------- #region Properties ////// The DependencyProperty for the Camera property. /// public static readonly DependencyProperty CameraProperty = Viewport3DVisual.CameraProperty.AddOwner( typeof(Viewport3D), new FrameworkPropertyMetadata( FreezableOperations.GetAsFrozen(new PerspectiveCamera()), new PropertyChangedCallback(OnCameraChanged))); private static void OnCameraChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { Viewport3D owner = (Viewport3D) d; if (!e.IsASubPropertyChange) { owner._viewport3DVisual.Camera = (Camera) e.NewValue; } } ////// Camera for viewing scene. If no camera is specified, then a default will be provided. /// public Camera Camera { get { return (Camera) GetValue(CameraProperty); } set { SetValue(CameraProperty, value); } } private static readonly DependencyPropertyKey ChildrenPropertyKey = DependencyProperty.RegisterReadOnly( "Children", typeof(Visual3DCollection), typeof(Viewport3D), new FrameworkPropertyMetadata((object) null)); ////// The 3D children of the Viewport3D /// public static readonly DependencyProperty ChildrenProperty = ChildrenPropertyKey.DependencyProperty; private static object ChildrenGetValueOverride(DependencyObject d) { return ((Viewport3D)d)._viewport3DVisual.Children; } ////// The 3D children of this Viewport3D. /// [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public Visual3DCollection Children { get { return (Visual3DCollection) GetValue(ChildrenProperty); } } #endregion //------------------------------------------------------ // // Protected methods // //------------------------------------------------------ #region Protected methods ////// Creates AutomationPeer ( protected override AutomationPeer OnCreateAutomationPeer() { return new Viewport3DAutomationPeer(this); } ///) /// /// Viewport3D arranges its children to fill whatever it is given. /// /// Size that Viewport3D will assume. protected override Size ArrangeOverride(Size finalSize) { Rect newBounds = new Rect(new Point(), finalSize); _viewport3DVisual.Viewport = newBounds; return finalSize; } ////// 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 override Visual GetVisualChild(int index) { //added in the constructor so 1 children always exist switch(index) { case 0: return _viewport3DVisual; default: throw new ArgumentOutOfRangeException("index", index, SR.Get(SRID.Visual_ArgumentOutOfRange)); } } ////// 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 override int VisualChildrenCount { //children are added in the constructor get { return 1; } } #endregion Protected methods //----------------------------------------------------- // // Private fields // //------------------------------------------------------ #region Private Fields private readonly Viewport3DVisual _viewport3DVisual; #endregion Private Fields //----------------------------------------------------- // // IAddChild implementation // //----------------------------------------------------- void IAddChild.AddChild(Object value) { if (value == null) { throw new ArgumentNullException("value"); } Visual3D visual3D = value as Visual3D; if (visual3D == null) { throw new ArgumentException(SR.Get(SRID.UnexpectedParameterType, value.GetType(), typeof(Visual3D)), "value"); } Children.Add(visual3D); } void IAddChild.AddText(string text) { // The only text we accept is whitespace, which we ignore. XamlSerializerUtil.ThrowIfNonWhiteSpaceInAddText(text, this); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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