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/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / Tools / System.Activities.Presentation / System / Activities / Presentation / View / VirtualizedContainerService.cs / 1305376 / VirtualizedContainerService.cs
//---------------------------------------------------------------- // Copyright (c) Microsoft Corporation. All rights reserved. //--------------------------------------------------------------- namespace System.Activities.Presentation.View { using System.Windows; using System.Windows.Media; using System.Windows.Media.Effects; using System.Windows.Documents; using System.Activities.Presentation; using System.Activities.Presentation.Model; using System.Activities.Presentation.Documents; using System.Activities.Presentation.Services; using System.Activities.Presentation.View; using System.Collections.ObjectModel; using System.Collections; using System.Collections.Generic; using System.Windows.Controls; using System.Windows.Threading; using System.Windows.Shapes; using System.Windows.Input; using System.Runtime; using System.Activities.Presentation.Debug; using System.Diagnostics.CodeAnalysis; using System.Xaml; using System.ComponentModel; using System.Globalization; using System.Linq; [Fx.Tag.XamlVisible(false)] public class VirtualizedContainerService { EditingContext context; QuadTreetree; bool isWorking = false; DesignerView designerView; ViewStateService viewStateService; ViewService viewService; IDictionary modelItemToContainer; [SuppressMessage(FxCop.Category.Security, FxCop.Rule.DoNotDeclareReadOnlyMutableReferenceTypes)] public static readonly AttachableMemberIdentifier HintSizeName = new AttachableMemberIdentifier(typeof(VirtualizedContainerService), "HintSize"); public VirtualizedContainerService(EditingContext context) { this.context = context; this.tree = new QuadTree (); this.modelItemToContainer = new Dictionary (); this.tree.Bounds = new Rect(0, 0, int.MaxValue, int.MaxValue); this.context.Services.Subscribe ((designerView) => { designerView.ScrollViewer.ScrollChanged += (sender, args) => { if (!isWorking) { isWorking = true; PopulateItemsInView(); isWorking = false; } }; }); } ViewStateService ViewStateService { get { if (this.viewStateService == null) { this.viewStateService = this.context.Services.GetService (); } Fx.Assert(this.viewStateService != null, "ViewStateService should not be null"); return this.viewStateService; } } ViewService ViewService { get { if (this.viewService == null) { this.viewService = this.context.Services.GetService (); } Fx.Assert(this.viewService != null, "ViewService should not be null"); return this.viewService; } } DesignerView DesignerView { get { if (this.designerView == null) { this.designerView = this.context.Services.GetService (); } Fx.Assert(this.designerView != null, "Designer view should not be null"); return this.designerView; } } public static object GetHintSize(object instance) { object viewState; AttachablePropertyServices.TryGetProperty(instance, HintSizeName, out viewState); return viewState; } public static void SetHintSize(object instance, object value) { AttachablePropertyServices.SetProperty(instance, HintSizeName, value); } // This method populates all items in the current scroll region. // we first get the virtualizing containers inthe current scroll region // ask them to populate the content, and then wait for a layout pass // so that the first round of population can cause more populations // we do this till all items in the current view are completely populated. private void PopulateItemsInView() { var designers = this.tree.GetNodesInside(GetViewerBounds()); bool rePopulationNeeded = false; foreach (VirtualizingContainer container in designers) { if (!container.IsPopulated) { container.Populate(); rePopulationNeeded = true; } } if (rePopulationNeeded) { Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Render, (Action)(() => { PopulateItemsInView(); })); } } // This method populates all items in the entire designer canvas // this uses the same technique Populateitemsinview uses to bring items into view. internal void BeginPopulateAll(Action onAfterPopulateAll) { Cursor oldCursor = Mouse.OverrideCursor; Mouse.OverrideCursor = Cursors.Wait; PopulateAllWithWaitCursor( oldCursor, onAfterPopulateAll); } void PopulateAllWithWaitCursor( Cursor oldCursor, Action onAfterPopulateAll) { var designers = this.tree.GetNodesInside(new Rect(0, 0, double.MaxValue, double.MaxValue)); bool rePopulationNeeded = false; foreach (VirtualizingContainer container in designers) { if (!container.IsPopulated) { container.Populate(); rePopulationNeeded = true; } } if (rePopulationNeeded) { Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Loaded, (Action)(() => { PopulateAllWithWaitCursor(oldCursor, onAfterPopulateAll); })); } else { Mouse.OverrideCursor = oldCursor; if (onAfterPopulateAll != null) { onAfterPopulateAll(); } } } Rect GetViewerBounds() { ScrollViewer parentView = this.DesignerView.ScrollViewer; Rect viewerBounds = new Rect(parentView.HorizontalOffset, parentView.VerticalOffset, parentView.ViewportWidth, parentView.ViewportHeight); viewerBounds.Scale(1 / this.designerView.ZoomFactor, 1 / this.designerView.ZoomFactor); return viewerBounds; } bool IsVirtualiztionEnabled { get { return true; } } internal FrameworkElement QueryContainerForItem(ModelItem item) { if (null == item) { throw FxTrace.Exception.ArgumentNull("item"); } FrameworkElement element; this.modelItemToContainer.TryGetValue(item, out element); return element; } public UIElement GetContainer(ModelItem modelItem, ICompositeView sourceContainer) { FrameworkElement view = null; if (IsVirtualiztionEnabled) { view = new VirtualizingContainer(this, modelItem, sourceContainer); view.Loaded += this.OnViewLoaded; view.Unloaded += this.OnViewUnloaded; } else { view = this.GetViewElement(modelItem, sourceContainer); } return view; } void OnViewLoaded(object view, RoutedEventArgs e) { var virtualView = view as VirtualizingContainer; var viewElement = view as WorkflowViewElement; if (null != virtualView && !this.modelItemToContainer.ContainsKey(virtualView.ModelItem)) { this.modelItemToContainer.Add(virtualView.ModelItem, virtualView); } else if (null != viewElement && !this.modelItemToContainer.ContainsKey(viewElement.ModelItem)) { this.modelItemToContainer.Add(viewElement.ModelItem, viewElement); } } void OnViewUnloaded(object view, RoutedEventArgs e) { var virtualView = view as VirtualizingContainer; var viewElement = view as WorkflowViewElement; if (null != virtualView && this.modelItemToContainer.ContainsKey(virtualView.ModelItem)) { this.modelItemToContainer.Remove(virtualView.ModelItem); } else if (null != viewElement && this.modelItemToContainer.ContainsKey(viewElement.ModelItem)) { this.modelItemToContainer.Remove(viewElement.ModelItem); } } public WorkflowViewElement GetViewElement(ModelItem modelItem, ICompositeView sourceContainer) { WorkflowViewElement itemView = (WorkflowViewElement)this.ViewService.GetView(modelItem); if (null != sourceContainer) { DragDropHelper.SetCompositeView(itemView, (UIElement)sourceContainer); } itemView.Loaded += this.OnViewLoaded; itemView.Unloaded += this.OnViewUnloaded; return itemView; } internal class VirtualizingContainer : Border { VirtualizedContainerService containerService; ModelItem modelItem; ICompositeView sourceContainer; UIElement designerRoot; bool isPopulated = false; Size defaultContainerSize = new Size(20, 20); Rect oldBounds; VirtualizingContainer parentContainer; List children; public ModelItem ModelItem { get { return this.modelItem; } } public ICompositeView ICompositeView { get { return this.sourceContainer; } } public IEnumerable ChildContainers { get { return this.children; } } [SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")] public VirtualizingContainer(VirtualizedContainerService containerService, ModelItem modelItem, ICompositeView sourceContainer) { this.containerService = containerService; this.modelItem = modelItem; this.sourceContainer = sourceContainer; this.Focusable = false; this.BorderThickness = new Thickness(1); SetupPlaceHolder(); this.children = new List (); this.Unloaded += (sender, args) => { this.containerService.tree.Remove(this); this.oldBounds = new Rect(0, 0, 0, 0); UnRegisterFromParentContainer(); }; this.Loaded += (sender, args) => { RegisterWithParentContainer(); }; } private void SetupPlaceHolder() { string sizeString = (string)(VirtualizedContainerService.GetHintSize(this.modelItem.GetCurrentValue())); Size? size = null; if (!string.IsNullOrEmpty(sizeString)) { size = Size.Parse(sizeString); } if (size == null) { size = defaultContainerSize; } this.MinWidth = size.Value.Width; this.MinHeight = size.Value.Height; } protected override Size ArrangeOverride(Size arrangeBounds) { this.Dispatcher.BeginInvoke(DispatcherPriority.Render, (Action)(() => { AddToQuadTree(); })); return base.ArrangeOverride(arrangeBounds); } void RegisterWithParentContainer() { DependencyObject parent = VisualTreeHelper.GetParent(this); while (null != parent && !(parent is VirtualizingContainer)) { parent = VisualTreeHelper.GetParent(parent); } this.parentContainer = parent as VirtualizingContainer; if (parentContainer != null) { if (!parentContainer.children.Contains(this)) { parentContainer.children.Add(this); } } } void UnRegisterFromParentContainer() { if (parentContainer != null) { parentContainer.children.Remove(this); } } private void AddToQuadTree() { try { Point currentPoint = GetPosition(); if (this.ActualHeight > 0 && this.ActualWidth > 0) { Rect bounds = new Rect(currentPoint, new Size(this.ActualWidth, this.ActualHeight)); Rect viewerBounds = this.containerService.GetViewerBounds(); bool isInView = viewerBounds.IntersectsWith(bounds) || viewerBounds.Contains(bounds) || bounds.Contains(viewerBounds); if (isInView) { this.Populate(); currentPoint = GetPosition(); bounds = new Rect(currentPoint, new Size(this.ActualWidth, this.ActualHeight)); } else { // a previous Arrange could have led to adding this to the quadtree already. // so remove previos instances from quadtree. if (!this.isPopulated) { if (this.BorderBrush != SystemColors.GrayTextBrush) { this.BorderBrush = SystemColors.GrayTextBrush; } } } if (this.oldBounds != bounds) { this.containerService.tree.Remove(this); this.containerService.tree.Insert(this, bounds); if (this.oldBounds != Rect.Empty) { this.Dispatcher.BeginInvoke(DispatcherPriority.Render, (Action)(() => { foreach (VirtualizingContainer childContainer in this.children) { // if there were designers registered under the old bounds let them re-register childContainer.AddToQuadTree(); } })); } this.oldBounds = bounds; } if (this.IsPopulated) { VirtualizedContainerService.SetHintSize(this.modelItem.GetCurrentValue(), bounds.Size.ToString(CultureInfo.InvariantCulture)); } } } catch (InvalidOperationException) { // This can happen if an arrange happened within the child of the container, when not in the visual tree // for the current breadcrumb root. The GetTransform will throw invalidoperation in this case. this.containerService.tree.Remove(this); } } UIElement DesignerRoot { get { if (this.designerRoot == null) { this.designerRoot = this.containerService.DesignerView.scrollableContent; } Fx.Assert(this.designerRoot != null, "Designer's scrollable content should not be null now "); return this.designerRoot; } } private Point GetPosition() { GeneralTransform generalTransform1 = this.TransformToAncestor((Visual)this.DesignerRoot); // Get current position by transforming origin using the current transform. Point currentPoint = generalTransform1.Transform(new Point(0, 0)); return currentPoint; } public bool IsPopulated { get { return this.isPopulated; } } internal void Populate() { if (!IsPopulated) { this.BorderBrush = Brushes.Transparent; this.BorderThickness = new Thickness(0); this.Child = this.containerService.GetViewElement(this.ModelItem, this.ICompositeView); this.MinHeight = defaultContainerSize.Height; this.MinWidth = defaultContainerSize.Width; isPopulated = true; } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------- // Copyright (c) Microsoft Corporation. All rights reserved. //--------------------------------------------------------------- namespace System.Activities.Presentation.View { using System.Windows; using System.Windows.Media; using System.Windows.Media.Effects; using System.Windows.Documents; using System.Activities.Presentation; using System.Activities.Presentation.Model; using System.Activities.Presentation.Documents; using System.Activities.Presentation.Services; using System.Activities.Presentation.View; using System.Collections.ObjectModel; using System.Collections; using System.Collections.Generic; using System.Windows.Controls; using System.Windows.Threading; using System.Windows.Shapes; using System.Windows.Input; using System.Runtime; using System.Activities.Presentation.Debug; using System.Diagnostics.CodeAnalysis; using System.Xaml; using System.ComponentModel; using System.Globalization; using System.Linq; [Fx.Tag.XamlVisible(false)] public class VirtualizedContainerService { EditingContext context; QuadTree tree; bool isWorking = false; DesignerView designerView; ViewStateService viewStateService; ViewService viewService; IDictionary modelItemToContainer; [SuppressMessage(FxCop.Category.Security, FxCop.Rule.DoNotDeclareReadOnlyMutableReferenceTypes)] public static readonly AttachableMemberIdentifier HintSizeName = new AttachableMemberIdentifier(typeof(VirtualizedContainerService), "HintSize"); public VirtualizedContainerService(EditingContext context) { this.context = context; this.tree = new QuadTree (); this.modelItemToContainer = new Dictionary (); this.tree.Bounds = new Rect(0, 0, int.MaxValue, int.MaxValue); this.context.Services.Subscribe ((designerView) => { designerView.ScrollViewer.ScrollChanged += (sender, args) => { if (!isWorking) { isWorking = true; PopulateItemsInView(); isWorking = false; } }; }); } ViewStateService ViewStateService { get { if (this.viewStateService == null) { this.viewStateService = this.context.Services.GetService (); } Fx.Assert(this.viewStateService != null, "ViewStateService should not be null"); return this.viewStateService; } } ViewService ViewService { get { if (this.viewService == null) { this.viewService = this.context.Services.GetService (); } Fx.Assert(this.viewService != null, "ViewService should not be null"); return this.viewService; } } DesignerView DesignerView { get { if (this.designerView == null) { this.designerView = this.context.Services.GetService (); } Fx.Assert(this.designerView != null, "Designer view should not be null"); return this.designerView; } } public static object GetHintSize(object instance) { object viewState; AttachablePropertyServices.TryGetProperty(instance, HintSizeName, out viewState); return viewState; } public static void SetHintSize(object instance, object value) { AttachablePropertyServices.SetProperty(instance, HintSizeName, value); } // This method populates all items in the current scroll region. // we first get the virtualizing containers inthe current scroll region // ask them to populate the content, and then wait for a layout pass // so that the first round of population can cause more populations // we do this till all items in the current view are completely populated. private void PopulateItemsInView() { var designers = this.tree.GetNodesInside(GetViewerBounds()); bool rePopulationNeeded = false; foreach (VirtualizingContainer container in designers) { if (!container.IsPopulated) { container.Populate(); rePopulationNeeded = true; } } if (rePopulationNeeded) { Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Render, (Action)(() => { PopulateItemsInView(); })); } } // This method populates all items in the entire designer canvas // this uses the same technique Populateitemsinview uses to bring items into view. internal void BeginPopulateAll(Action onAfterPopulateAll) { Cursor oldCursor = Mouse.OverrideCursor; Mouse.OverrideCursor = Cursors.Wait; PopulateAllWithWaitCursor( oldCursor, onAfterPopulateAll); } void PopulateAllWithWaitCursor( Cursor oldCursor, Action onAfterPopulateAll) { var designers = this.tree.GetNodesInside(new Rect(0, 0, double.MaxValue, double.MaxValue)); bool rePopulationNeeded = false; foreach (VirtualizingContainer container in designers) { if (!container.IsPopulated) { container.Populate(); rePopulationNeeded = true; } } if (rePopulationNeeded) { Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Loaded, (Action)(() => { PopulateAllWithWaitCursor(oldCursor, onAfterPopulateAll); })); } else { Mouse.OverrideCursor = oldCursor; if (onAfterPopulateAll != null) { onAfterPopulateAll(); } } } Rect GetViewerBounds() { ScrollViewer parentView = this.DesignerView.ScrollViewer; Rect viewerBounds = new Rect(parentView.HorizontalOffset, parentView.VerticalOffset, parentView.ViewportWidth, parentView.ViewportHeight); viewerBounds.Scale(1 / this.designerView.ZoomFactor, 1 / this.designerView.ZoomFactor); return viewerBounds; } bool IsVirtualiztionEnabled { get { return true; } } internal FrameworkElement QueryContainerForItem(ModelItem item) { if (null == item) { throw FxTrace.Exception.ArgumentNull("item"); } FrameworkElement element; this.modelItemToContainer.TryGetValue(item, out element); return element; } public UIElement GetContainer(ModelItem modelItem, ICompositeView sourceContainer) { FrameworkElement view = null; if (IsVirtualiztionEnabled) { view = new VirtualizingContainer(this, modelItem, sourceContainer); view.Loaded += this.OnViewLoaded; view.Unloaded += this.OnViewUnloaded; } else { view = this.GetViewElement(modelItem, sourceContainer); } return view; } void OnViewLoaded(object view, RoutedEventArgs e) { var virtualView = view as VirtualizingContainer; var viewElement = view as WorkflowViewElement; if (null != virtualView && !this.modelItemToContainer.ContainsKey(virtualView.ModelItem)) { this.modelItemToContainer.Add(virtualView.ModelItem, virtualView); } else if (null != viewElement && !this.modelItemToContainer.ContainsKey(viewElement.ModelItem)) { this.modelItemToContainer.Add(viewElement.ModelItem, viewElement); } } void OnViewUnloaded(object view, RoutedEventArgs e) { var virtualView = view as VirtualizingContainer; var viewElement = view as WorkflowViewElement; if (null != virtualView && this.modelItemToContainer.ContainsKey(virtualView.ModelItem)) { this.modelItemToContainer.Remove(virtualView.ModelItem); } else if (null != viewElement && this.modelItemToContainer.ContainsKey(viewElement.ModelItem)) { this.modelItemToContainer.Remove(viewElement.ModelItem); } } public WorkflowViewElement GetViewElement(ModelItem modelItem, ICompositeView sourceContainer) { WorkflowViewElement itemView = (WorkflowViewElement)this.ViewService.GetView(modelItem); if (null != sourceContainer) { DragDropHelper.SetCompositeView(itemView, (UIElement)sourceContainer); } itemView.Loaded += this.OnViewLoaded; itemView.Unloaded += this.OnViewUnloaded; return itemView; } internal class VirtualizingContainer : Border { VirtualizedContainerService containerService; ModelItem modelItem; ICompositeView sourceContainer; UIElement designerRoot; bool isPopulated = false; Size defaultContainerSize = new Size(20, 20); Rect oldBounds; VirtualizingContainer parentContainer; List children; public ModelItem ModelItem { get { return this.modelItem; } } public ICompositeView ICompositeView { get { return this.sourceContainer; } } public IEnumerable ChildContainers { get { return this.children; } } [SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")] public VirtualizingContainer(VirtualizedContainerService containerService, ModelItem modelItem, ICompositeView sourceContainer) { this.containerService = containerService; this.modelItem = modelItem; this.sourceContainer = sourceContainer; this.Focusable = false; this.BorderThickness = new Thickness(1); SetupPlaceHolder(); this.children = new List (); this.Unloaded += (sender, args) => { this.containerService.tree.Remove(this); this.oldBounds = new Rect(0, 0, 0, 0); UnRegisterFromParentContainer(); }; this.Loaded += (sender, args) => { RegisterWithParentContainer(); }; } private void SetupPlaceHolder() { string sizeString = (string)(VirtualizedContainerService.GetHintSize(this.modelItem.GetCurrentValue())); Size? size = null; if (!string.IsNullOrEmpty(sizeString)) { size = Size.Parse(sizeString); } if (size == null) { size = defaultContainerSize; } this.MinWidth = size.Value.Width; this.MinHeight = size.Value.Height; } protected override Size ArrangeOverride(Size arrangeBounds) { this.Dispatcher.BeginInvoke(DispatcherPriority.Render, (Action)(() => { AddToQuadTree(); })); return base.ArrangeOverride(arrangeBounds); } void RegisterWithParentContainer() { DependencyObject parent = VisualTreeHelper.GetParent(this); while (null != parent && !(parent is VirtualizingContainer)) { parent = VisualTreeHelper.GetParent(parent); } this.parentContainer = parent as VirtualizingContainer; if (parentContainer != null) { if (!parentContainer.children.Contains(this)) { parentContainer.children.Add(this); } } } void UnRegisterFromParentContainer() { if (parentContainer != null) { parentContainer.children.Remove(this); } } private void AddToQuadTree() { try { Point currentPoint = GetPosition(); if (this.ActualHeight > 0 && this.ActualWidth > 0) { Rect bounds = new Rect(currentPoint, new Size(this.ActualWidth, this.ActualHeight)); Rect viewerBounds = this.containerService.GetViewerBounds(); bool isInView = viewerBounds.IntersectsWith(bounds) || viewerBounds.Contains(bounds) || bounds.Contains(viewerBounds); if (isInView) { this.Populate(); currentPoint = GetPosition(); bounds = new Rect(currentPoint, new Size(this.ActualWidth, this.ActualHeight)); } else { // a previous Arrange could have led to adding this to the quadtree already. // so remove previos instances from quadtree. if (!this.isPopulated) { if (this.BorderBrush != SystemColors.GrayTextBrush) { this.BorderBrush = SystemColors.GrayTextBrush; } } } if (this.oldBounds != bounds) { this.containerService.tree.Remove(this); this.containerService.tree.Insert(this, bounds); if (this.oldBounds != Rect.Empty) { this.Dispatcher.BeginInvoke(DispatcherPriority.Render, (Action)(() => { foreach (VirtualizingContainer childContainer in this.children) { // if there were designers registered under the old bounds let them re-register childContainer.AddToQuadTree(); } })); } this.oldBounds = bounds; } if (this.IsPopulated) { VirtualizedContainerService.SetHintSize(this.modelItem.GetCurrentValue(), bounds.Size.ToString(CultureInfo.InvariantCulture)); } } } catch (InvalidOperationException) { // This can happen if an arrange happened within the child of the container, when not in the visual tree // for the current breadcrumb root. The GetTransform will throw invalidoperation in this case. this.containerService.tree.Remove(this); } } UIElement DesignerRoot { get { if (this.designerRoot == null) { this.designerRoot = this.containerService.DesignerView.scrollableContent; } Fx.Assert(this.designerRoot != null, "Designer's scrollable content should not be null now "); return this.designerRoot; } } private Point GetPosition() { GeneralTransform generalTransform1 = this.TransformToAncestor((Visual)this.DesignerRoot); // Get current position by transforming origin using the current transform. Point currentPoint = generalTransform1.Transform(new Point(0, 0)); return currentPoint; } public bool IsPopulated { get { return this.isPopulated; } } internal void Populate() { if (!IsPopulated) { this.BorderBrush = Brushes.Transparent; this.BorderThickness = new Thickness(0); this.Child = this.containerService.GetViewElement(this.ModelItem, this.ICompositeView); this.MinHeight = defaultContainerSize.Height; this.MinWidth = defaultContainerSize.Width; isPopulated = true; } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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