Synchronize the Net40

Net40/HandyControl_Net40/Controls/Cover/CoverFlow/CoverFlow.cs

@@ -0,0 +1,305 @@
+using System;
+using System.Collections.Generic;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Media.Media3D;
+using HandyControl.Data;
+
+namespace HandyControl.Controls
+{
+    /// <summary>
+    ///     封面流
+    /// </summary>
+    [TemplatePart(Name = ElementViewport3D, Type = typeof(Viewport3D))]
+    [TemplatePart(Name = ElementCamera, Type = typeof(ProjectionCamera))]
+    [TemplatePart(Name = ElementVisualParent, Type = typeof(ModelVisual3D))]
+    public class CoverFlow : Control
+    {
+        private const string ElementViewport3D = "PART_Viewport3D";
+
+        private const string ElementCamera = "PART_Camera";
+
+        private const string ElementVisualParent = "PART_VisualParent";
+
+        /// <summary>
+        ///     最大显示数量的一半
+        /// </summary>
+        private const int MaxShowCountHalf = 7;
+
+        /// <summary>
+        ///     页码
+        /// </summary>
+        public static readonly DependencyProperty PageIndexProperty = DependencyProperty.Register(
+            "PageIndex", typeof(int), typeof(CoverFlow),
+            new PropertyMetadata(ValueBoxes.Int0Box, OnPageIndexChanged, CoercePageIndex));
+
+        private static object CoercePageIndex(DependencyObject d, object baseValue)
+        {
+            var ctl = (CoverFlow)d;
+            var v = (int)baseValue;
+
+            if (v < 0)
+            {
+                return 0;
+            }
+            if (v >= ctl._uriList.Count)
+            {
+                return ctl._uriList.Count - 1;
+            }
+            return v;
+        }
+
+        private static void OnPageIndexChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            var ctl = (CoverFlow)d;
+            ctl.UpdateIndex((int)e.NewValue, (int)e.OldValue);
+        }
+
+        /// <summary>
+        ///     是否循环
+        /// </summary>
+        public static readonly DependencyProperty LoopProperty = DependencyProperty.Register(
+            "Loop", typeof(bool), typeof(CoverFlow), new PropertyMetadata(ValueBoxes.FalseBox));
+
+        /// <summary>
+        ///     存储所有的资源标识符
+        /// </summary>
+        private readonly Dictionary<int, Uri> _uriList = new Dictionary<int, Uri>();
+
+        /// <summary>
+        ///     当前在显示范围内的项
+        /// </summary>
+        private readonly Dictionary<int, CoverFlowItem> _itemShowList = new Dictionary<int, CoverFlowItem>();
+
+        /// <summary>
+        ///     相机
+        /// </summary>
+        private ProjectionCamera _camera;
+
+        /// <summary>
+        ///     3d画布
+        /// </summary>
+        private Viewport3D _viewport3D;
+
+        /// <summary>
+        ///     项容器
+        /// </summary>
+        private ModelVisual3D _visualParent;
+
+        /// <summary>
+        ///     显示范围内第一个项的编号
+        /// </summary>
+        private int _firstShowIndex;
+
+        /// <summary>
+        ///     显示范围内最后一个项的编号
+        /// </summary>
+        private int _lastShowIndex;
+
+        /// <summary>
+        ///     跳转编号
+        /// </summary>
+        private int _jumpToIndex = -1;
+
+        /// <summary>
+        ///     页码
+        /// </summary>
+        public int PageIndex
+        {
+            get => (int)GetValue(PageIndexProperty);
+            internal set => SetValue(PageIndexProperty, value);
+        }
+
+        /// <summary>
+        ///     是否循环
+        /// </summary>
+        public bool Loop
+        {
+            get => (bool)GetValue(LoopProperty);
+            set => SetValue(LoopProperty, value);
+        }
+
+        public override void OnApplyTemplate()
+        {
+            if (_viewport3D != null)
+            {
+                _viewport3D.Children.Clear();
+                _itemShowList.Clear();
+                _viewport3D.MouseLeftButtonDown -= Viewport3D_MouseLeftButtonDown;
+            }
+
+            base.OnApplyTemplate();
+
+            _viewport3D = GetTemplateChild(ElementViewport3D) as Viewport3D;
+            if (_viewport3D != null)
+            {
+                _viewport3D.MouseLeftButtonDown += Viewport3D_MouseLeftButtonDown;
+            }
+
+            _camera = GetTemplateChild(ElementCamera) as ProjectionCamera;
+            _visualParent = GetTemplateChild(ElementVisualParent) as ModelVisual3D;
+
+            UpdateShowRange();
+            if (_jumpToIndex > 0)
+            {
+                PageIndex = _jumpToIndex;
+                _jumpToIndex = -1;
+            }
+            _camera.Position = new Point3D(CoverFlowItem.Interval * PageIndex, _camera.Position.Y, _camera.Position.Z);
+        }
+
+        /// <summary>
+        ///     批量添加资源
+        /// </summary>
+        /// <param name="uriList"></param>
+        public void AddRange(List<Uri> uriList)
+        {
+            foreach (var uri in uriList)
+            {
+                _uriList.Add(_uriList.Count, uri);
+            }
+        }
+
+        /// <summary>
+        ///     添加一项资源
+        /// </summary>
+        /// <param name="uriString"></param>
+        public void Add(string uriString) => _uriList.Add(_uriList.Count, new Uri(uriString));
+
+        /// <summary>
+        ///     添加一项资源
+        /// </summary>
+        /// <param name="uri"></param>
+        public void Add(Uri uri) => _uriList.Add(_uriList.Count, uri);
+
+        /// <summary>
+        ///     跳转
+        /// </summary>
+        public void JumpTo(int index) => _jumpToIndex = index;
+
+        protected override void OnMouseWheel(MouseWheelEventArgs e)
+        {
+            base.OnMouseWheel(e);
+
+            if (e.Delta < 0)
+            {
+                var index = PageIndex + 1;
+                PageIndex = index >= _uriList.Count ? (Loop ? 0 : _uriList.Count - 1) : index;
+            }
+            else
+            {
+                var index = PageIndex - 1;
+                PageIndex = index < 0 ? (Loop ? _uriList.Count - 1 : 0) : index;
+            }
+        }
+
+        /// <summary>
+        ///     删除指定位置的项
+        /// </summary>
+        /// <param name="pos"></param>
+        private void Remove(int pos)
+        {
+            var item = _itemShowList[pos];
+            _visualParent.Children.Remove(item);
+            _itemShowList.Remove(pos);
+        }
+
+        /// <summary>
+        ///     移动项到指定的位置
+        /// </summary>
+        /// <param name="index"></param>
+        /// <param name="animated"></param>
+        private void Move(int index, bool animated) => _itemShowList[index].Move(PageIndex, animated);
+
+        private void Viewport3D_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
+        {
+            var result = (RayMeshGeometry3DHitTestResult)VisualTreeHelper.HitTest(_viewport3D, e.GetPosition(_viewport3D));
+            if (result != null)
+            {
+                foreach (var item in _itemShowList.Values)
+                {
+                    if (item.HitTest(result.MeshHit))
+                    {
+                        PageIndex = item.Index;
+                        break;
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        ///     更新项的位置
+        /// </summary>
+        /// <param name="newIndex"></param>
+        /// <param name="oldIndex"></param>
+        private void UpdateIndex(int newIndex, int oldIndex)
+        {
+            var animate = Math.Abs(newIndex - oldIndex) < MaxShowCountHalf;
+            UpdateShowRange();
+            if (newIndex > oldIndex)
+            {
+                if (oldIndex < _firstShowIndex)
+                {
+                    oldIndex = _firstShowIndex;
+                }
+                for (var i = oldIndex; i <= newIndex; i++)
+                {
+                    Move(i, animate);
+                }
+            }
+            else
+            {
+                if (oldIndex > _lastShowIndex)
+                {
+                    oldIndex = _lastShowIndex;
+                }
+                for (var i = oldIndex; i >= newIndex; i--)
+                {
+                    Move(i, animate);
+                }
+            }
+            _camera.Position = new Point3D(CoverFlowItem.Interval * newIndex, _camera.Position.Y,
+                _camera.Position.Z);
+        }
+
+        /// <summary>
+        ///     更新显示范围
+        /// </summary>
+        private void UpdateShowRange()
+        {
+            var newFirstShowIndex = Math.Max(PageIndex - MaxShowCountHalf, 0);
+            var newLastShowIndex = Math.Min(PageIndex + MaxShowCountHalf, _uriList.Count - 1);
+
+            if (_firstShowIndex < newFirstShowIndex)
+            {
+                for (var i = _firstShowIndex; i < newFirstShowIndex; i++)
+                {
+                    Remove(i);
+                }
+            }
+            else if (newLastShowIndex < _lastShowIndex)
+            {
+                for (var i = newLastShowIndex; i < _lastShowIndex; i++)
+                {
+                    Remove(i);
+                }
+            }
+
+            for (var i = newFirstShowIndex; i <= newLastShowIndex; i++)
+            {
+                if (!_itemShowList.ContainsKey(i))
+                {
+                    var cover = new CoverFlowItem(i, PageIndex, BitmapFrame.Create(_uriList[i]));
+                    _itemShowList[i] = cover;
+                    _visualParent.Children.Add(cover);
+                }
+            }
+
+            _firstShowIndex = newFirstShowIndex;
+            _lastShowIndex = newLastShowIndex;
+        }
+    }
+}

Net40/HandyControl_Net40/Controls/Cover/CoverFlow/CoverFlowItem.cs

@@ -0,0 +1,165 @@
+using System;
+using System.Windows;
+using System.Windows.Media;
+using System.Windows.Media.Media3D;
+using HandyControl.Tools;
+
+namespace HandyControl.Controls
+{
+    public class CoverFlowItem : ModelVisual3D
+    {
+        internal static readonly double Interval = .2;
+
+        internal static readonly double AnimationSpeed = 400;
+
+        private readonly AxisAngleRotation3D _rotation3D;
+
+        private readonly TranslateTransform3D _transform3D;
+
+        private readonly Model3DGroup _model3DGroup;
+
+        private readonly ImageSource _source;
+
+        internal int Index { get; set; }
+
+        public CoverFlowItem(int itemIndex, int currentIndex, ImageSource source)
+        {
+            Index = itemIndex;
+            _source = source;
+
+            _rotation3D = new AxisAngleRotation3D(new Vector3D(0, 1, 0), GetAngleByPos(currentIndex));
+            _transform3D = new TranslateTransform3D(GetXByPos(currentIndex), 0, GetZByPos(currentIndex));
+
+            var transformGroup = new Transform3DGroup();
+            transformGroup.Children.Add(new RotateTransform3D(_rotation3D));
+            transformGroup.Children.Add(_transform3D);
+
+            _model3DGroup = new Model3DGroup();
+            _model3DGroup.Children.Add(new GeometryModel3D(CreateItemGeometry(), new DiffuseMaterial(new ImageBrush(_source))));
+            _model3DGroup.Transform = transformGroup;
+
+            Content = _model3DGroup;
+        }
+
+        /// <summary>
+        ///     创建网格形状
+        /// </summary>
+        /// <param name="p0"></param>
+        /// <param name="p1"></param>
+        /// <param name="p2"></param>
+        /// <param name="p3"></param>
+        /// <returns></returns>
+        private static MeshGeometry3D CreateMeshGeometry(Point3D p0, Point3D p1, Point3D p2, Point3D p3)
+        {
+            var positions = new Point3DCollection
+            {
+                p0,
+                p1,
+                p2,
+                p3
+            };
+
+            var triangleIndices = new Int32Collection
+            {
+                0,
+                1,
+                2,
+                2,
+                3,
+                0
+            };
+
+            var textureCoordinates = new PointCollection
+            {
+                new Point(0, 1),
+                new Point(1, 1),
+                new Point(1, 0),
+                new Point(0, 0),
+                new Point(1, 0),
+                new Point(1, 1)
+            };
+
+            var normals = new Vector3DCollection
+            {
+                ArithmeticHelper.CalNormal(p0, p1, p2),
+                ArithmeticHelper.CalNormal(p2, p3, p0)
+            };
+
+            var geometry3D = new MeshGeometry3D
+            {
+                Positions = positions,
+                TriangleIndices = triangleIndices,
+                TextureCoordinates = textureCoordinates,
+                Normals = normals
+            };
+
+            geometry3D.Freeze();
+            return geometry3D;
+        }
+
+        /// <summary>
+        ///     创建内容形状
+        /// </summary>
+        /// <returns></returns>
+        private Geometry3D CreateItemGeometry()
+        {
+            var sx = _source.Width > _source.Height ? 0 : 1 - _source.Width / _source.Height;
+            var sy = _source.Width < _source.Height ? 0 : 1 - _source.Height / _source.Width;
+
+            var p0 = new Point3D(-1 + sx, -1 + sy, 0);
+            var p1 = new Point3D(1 - sx, -1 + sy, 0);
+            var p2 = new Point3D(1 - sx, 1 - sy, 0);
+            var p3 = new Point3D(-1 + sx, 1 - sy, 0);
+
+            return CreateMeshGeometry(p0, p1, p2, p3);
+        }
+
+        private double GetAngleByPos(int index) => Math.Sign(Index - index) * -90;
+
+        private double GetXByPos(int index) => Index * Interval + Math.Sign(Index - index) * 1.5;
+
+        private double GetZByPos(int index) => Index == index ? 1 : 0;
+
+        /// <summary>
+        ///     移动
+        /// </summary>
+        internal void Move(int currentIndex, bool animated)
+        {
+            if (animated || _rotation3D.HasAnimatedProperties)
+            {
+                _rotation3D.BeginAnimation(AxisAngleRotation3D.AngleProperty,
+                    AnimationHelper.CreateAnimation(GetAngleByPos(currentIndex), AnimationSpeed));
+                _transform3D.BeginAnimation(TranslateTransform3D.OffsetXProperty,
+                    AnimationHelper.CreateAnimation(GetXByPos(currentIndex), AnimationSpeed));
+                _transform3D.BeginAnimation(TranslateTransform3D.OffsetZProperty,
+                    AnimationHelper.CreateAnimation(GetZByPos(currentIndex), AnimationSpeed));
+            }
+            else
+            {
+                _rotation3D.Angle = GetAngleByPos(currentIndex);
+                _transform3D.OffsetX = GetXByPos(currentIndex);
+                _transform3D.OffsetZ = GetZByPos(currentIndex);
+            }
+        }
+
+        /// <summary>
+        ///     命中测试
+        /// </summary>
+        /// <param name="mesh"></param>
+        /// <returns></returns>
+        internal bool HitTest(MeshGeometry3D mesh)
+        {
+            foreach (var item in _model3DGroup.Children)
+            {
+                if (item is GeometryModel3D geometryModel3D)
+                {
+                    if (Equals(geometryModel3D.Geometry, mesh))
+                    {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+    }
+}