MindFusion.Diagramming.Wpf.VirtualizingDiagram Class

VirtualizingDiagram Class

Remarks See Also

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MindFusion.Animations

MindFusion.Diagramming.Wpf

Action Enumeration

AdjustmentHandle Class

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AdornerVisual Class

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CursorHint Enumeration

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DiagramBase Class

DiagramDocument Class

DiagramDocumentPaginator Class

DiagramEventArgs Class

DiagramItem Class

DiagramItemCollection Class

DiagramItemProperties Class

DiagramItemState Class

DiagramLink Class

DiagramLinkCollection Class

DiagramLinkProperties Class

DiagramLinkState Class

DiagramNode Class

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DiagramNodeProperties Class

DiagramNodeState Class

DiagramPage Class

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ExpandButtonAction Enumeration

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FishboneDiagram Class

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Orientation Enumeration

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PolylineRouting Enumeration

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ReadOnlyCollection(T) Class

ReadOnlyDiagramItemCollection Class

ReadOnlyDiagramLinkCollection Class

ReadOnlyDiagramNodeCollection Class

Relationship Enumeration

RelativePosition Class

RelativeToLink Enumeration

RelativeToNode Enumeration

RenderOptions Class

RenderTarget Enumeration

RepaintEventArgs Class

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ResolveContainer Delegate

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RulerUnit Enumeration

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ShapeNode Class

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ShowAnchors Enumeration

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StringAlignment Enumeration

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TabbedDiagramView Class

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TableNode.Cell Class

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TreeViewConnectionPoint Class

TreeViewConnectionStyle Enumeration

TreeViewItem Class

TreeViewNode Class

UndoEventArgs Class

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UnitType Enumeration

VirtualizingDiagram Class

VirtualizingDiagram Members

VirtualizingDiagram Fields

VirtualizingDiagram Constructor

VirtualizingDiagram Methods

VirtualizingDiagram Properties

VirtualizingDiagram Events

VirtualLinkEventArgs Class

VirtualNodeEventArgs Class

VisioContent Class

VisioNode Class

VisioNodeProperties Class

VisioStencil Class

VisualBrushPaginator Class

VisualContainer Interface

VisualDiagramView Class

XmlConvert Class

XmlOptions Class

XmlPersistContext Class

MindFusion.Diagramming.Wpf.Behaviors

MindFusion.Diagramming.Wpf.Commands

MindFusion.Diagramming.Wpf.Controllers

MindFusion.Diagramming.Wpf.Export

MindFusion.Diagramming.Wpf.Fluent

MindFusion.Diagramming.Wpf.Import

MindFusion.Diagramming.Wpf.Lanes

MindFusion.Diagramming.Wpf.Layout

MindFusion.Diagramming.Wpf.Layout.Fluent

MindFusion.Json.Wpf

MindFusion.Layout

MindFusion.Layout.Layout3D

Table of Predefined Shapes

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Implements virtualization of diagram elements.

Namespace: MindFusion.Diagramming.Wpf
Assembly: MindFusion.Diagramming.Wpf

Syntax

C# Copy Code
public class VirtualizingDiagram : Diagram

Visual Basic Copy Code
Public Class VirtualizingDiagram Inherits Diagram

Remarks

VirtualizingDiagram can display very large diagrams where there are actual DiagramNode and DiagramLink instances created only for the elements that should be currently shown on screen. This helps keeping the WPF visual tree small and could lead to huge performance improvements if there are thousands of elements in the diagram.

The data items that should be displayed as nodes must be assigned to the NodesSource property, and the data items that should be displayed as links must be assigned to the LinksSource property. The BindingMode property specifies whether the data source should be updated when the user draws new diagram items interactively.

When the diagram is displayed initially, or while the user scrolls it, VirtualizingDiagram automatically creates TemplatedNode and DiagramLink instances for the items that should be shown on screen. You can create diagram items of a different type via the InstantiateNode and InstantiateLink callbacks. Similarly when the user draws diagram items, the control calls the InstantiateNodeData and InstantiateLinkData delegates to create data items for the new diagram items.

VirtualizingDiagram assumes that node data items expose X and Y properties of type double specifying the node positions, and optional Width and Height properties specifying the node sizes. If Width and Height are not present, the nodes size is set to DefaultNodeSize. It is also possible to specify custom positions via the ResolveNodePosition delegate. Link data items must expose Origin and Destination properties that are references to items from NodesSource.

VirtualizingDiagram is a child class of Diagram and derives all of its properties and events. This lets you specify default appearance properties the usual way, and handle events such as NodeClicked to detect clicks over the visible items. Note that the base Nodes and Links collections will contain items only for the currently visible portion of the diagram.

When handling Diagram events raised for nodes and links, use the GetDataItem method to find out which item from the data source is associated with an actual diagram item. Vice versa, call GetDiagramNode and GetDiagramLink to find out the diagram item currently shown for a data item, if any.

Inheritance Hierarchy

System.Object
    System.Windows.Threading.DispatcherObject
        System.Windows.DependencyObject
            System.Windows.Media.Visual
                System.Windows.UIElement
                    System.Windows.FrameworkElement
                        System.Windows.Controls.Control
                            MindFusion.Diagramming.Wpf.DiagramBase
                                MindFusion.Diagramming.Wpf.Diagram
                                    MindFusion.Diagramming.Wpf.VirtualizingDiagram

See Also

VirtualizingDiagram Members
MindFusion.Diagramming.Wpf Namespace