Class GraphObject

GoDiagram®
v10.0.8
by Northwoods Software®

This is the abstract base class for all graphical objects. Classes inheriting from GraphObject include: Shape, TextBlock, Picture, and Panel. From the Panel class the Part class is derived, from which the Node and Link classes derive.

Inheritance

object

GraphObject

Implements

IHasContextMenu

IHasToolTip

Namespace: Northwoods.Go

Assembly: Northwoods.GoDiagram.WinForms.dll

Syntax

public abstract class GraphObject : IHasContextMenu, IHasToolTip

Remarks

It is very common to make use of the functions Add(params GraphObject[]), Bind(string, TargetConversion, BackConversion), and Set(object) in order to build up a visual tree of GraphObjects. You can see many examples of this throughout the Introduction, starting at Building Objects, and the Samples, starting with Minimal Sample.

Since GraphObject is an abstract class, programmers do not create GraphObjects themselves, but this class defines many properties used by all kinds of GraphObjects.

The only visual property on GraphObject is Background. However one can control whether the GraphObject is drawn at all by setting Visible, or by setting Opacity to zero if you still want the GraphObject to occupy space. Call the IsVisibleElement() predicate to determine whether the object is visible and all of its containing panels are visible. Also, if you want to control whether any mouse or touch events "see" the GraphObject, you can set Pickable to false.

For more information about specifying how things get drawn, see the properties on the Shape, TextBlock, and Picture classes.

GraphObject Sizing

GraphObject defines most of the properties that cause objects to size themselves differently. The most prominent ones include:

The DesiredSize, MinSize, and MaxSize properties are used to explicitly set or limit the size of visual elements. Width and Height are convenience properties that set the DesiredSize width and height, respectively.
The Angle and Scale properties are used to transform visual elements.
The Stretch property determines how a GraphObject will fill its visual space, contextually granted to it by its containing Panel. Top-level (Part) GraphObjects are not affected by this property because they are always granted infinite space.

All GraphObjects in a Diagram are measured and then arranged by their containing Panels in a tree-like fashion. After measuring and arranging, a GraphObject will have valid values for the read-only properties NaturalBounds, MeasuredBounds, and ActualBounds.

The NaturalBounds of a GraphObject describe its local size, without any transformations (Scale, Angle) affecting it.
The MeasuredBounds of a GraphObject describe its size within its containing Panel.
The ActualBounds of a GraphObject describe its position and given size inside of its panel. This size may be smaller than MeasuredBounds, for instance if a GraphObject with a large DesiredSize is placed in a Panel of a smaller DesiredSize. Smaller ActualBounds than MeasuredBounds typically means an object will be cropped.

See the Introduction page on sizing for usage information and examples.

GraphObject Size and Position within Panel

Several GraphObject properties guide the containing Panel for how to size and position the object within the panel.

The Alignment specifies where the object should be relative to some area of the panel. For example, an alignment value of BottomRight means that the GraphObject should be at the bottom-right corner of the panel.
The AlignmentFocus specifies precisely which point of the GraphObject should be aligned at the Alignment spot.
The Column and Row properties are only used by PanelLayoutTable panels, to indicate where the GraphObject should be.
The ColumnSpan and RowSpan properties tell the PanelLayoutTable panel how large the GraphObject should be.
The IsPanelMain property indicates to some kinds of Panels that the GraphObject is the "primary" object that other panel children should be measured with or positioned in.
The Margin property tells the containing Panel how much extra space to put around this GraphObject.
The Position property is used to determine the relative position of GraphObjects when they are elements of a PanelLayoutPosition panel.

See the Introduction page on Panels and Table Panels for an overview of the capabilities.

Top-level GraphObjects are Parts

A Part is a derived class of GraphObject representing a top-level object. All top-level GraphObjects must be Parts, and Node, Link, Group, and Adornment derive from Part. The position of a Part determines the point of the Part's top-left corner in document coordinates. See also Location, which supports an way to specify the position based on a different spot of a different element within the Part.

There are several read-only properties that help navigate up the visual tree.

Panel returns the Panel that directly contains this GraphObject
Part returns the Part that this GraphObject is in, perhaps via intervening Panels; this is frequently used in order to get to the model data, Data
Layer returns the Layer that this GraphObject's Part is in
Diagram returns the Diagram that this GraphObject's Part's Layer is in

See the Visual Tree sample for a diagram displaying the visual tree of a simple diagram.

User Interaction

GraphObjects have several properties enabling dynamic customizable interaction. There are several definable functions that execute on input events: MouseDragEnter, MouseDragLeave, MouseDrop, MouseEnter, MouseHold, MouseHover, MouseLeave, and MouseOver. For example, you could define mouse enter-and-leave event handlers to modify the appearance of a link as the mouse passes over it:

myDiagram.LinkTemplate =
  new Link()
    .Add(
      new Shape {
        StrokeWidth = 2, Stroke = "gray",  // default color is "gray"
        MouseEnter = (e, obj, prev) => { var shp = obj as Shape; shp.StrokeWidth = 4; shp.Stroke = "dodgerblue"; },
        MouseLeave = (e, obj, prev) => { var shp = obj as Shape; shp.StrokeWidth = 2; shp.Stroke = "gray"; }
      }
    );

There are Click, DoubleClick, and ContextClick functions that execute when a user appropriately clicks the GraphObject. These click functions are called with the InputEvent as the first argument and this GraphObject as the second argument. For example, you could define a click event handler on a Node that goes to another page:

myDiagram.NodeTemplate =
  new Node(PanelLayoutAuto.Instance) {
      // second arg will be this GraphObject, which in this case is the Node itself:
      Click = (e, obj) => {
        var d = ((Node)obj).Data as MyNodeData;
        Console.WriteLine("Node key is " + d.Key);
      }
    }.Add(
      new Shape("RoundedRectangle")
        .Bind("Fill", "Color"),
      new TextBlock { Name = "TB", Margin = 3 }
        .Bind("Text", "Key")
    );

Note: you may prefer defining DiagramEvent listeners on the Diagram rather than on individual GraphObjects. DiagramEvents also include more general events that do not necessarily correspond to input events.

The properties ActionCancel, ActionDown, ActionMove, and ActionUp define functions to execute when the GraphObject's IsActionable property is set to true (default false). See the ActionTool for more detail.

See the Introduction page on Events for a more general discussion.

GraphObjects as Ports

Links can only connect to elements within a Node that are specified as "ports", and by default the only port is the Node itself. Setting the PortId of a GraphObject inside a Node allows that object to act as a port. Note: the only kind of model that can save which port a link is connected with, i.e. portIds that are not an empty string, is a GraphLinksModel<TNodeData, TNodeKey, TSharedData, TLinkData, TLinkKey, TPort> whose LinkFromPortIdProperty and LinkToPortIdProperty have been set to name properties on the link data objects.

GraphObjects have several properties that are only relevant when they are acting as ports. These port-related properties are:

PortId, which must be set to a string that is unique within the Node, in order for this GraphObject to be treated as a "port", rather than the whole node
FromSpot and ToSpot, where a link should connect with this port
FromEndSegmentLength and ToEndSegmentLength, the length of the link segment adjacent to this port
FromShortLength and ToShortLength, the distance the link should terminate before touching this port
FromLinkable and ToLinkable, whether the user may draw links connecting with this port
FromLinkableDuplicates and ToLinkableDuplicates, whether the user may draw multiple links between the same pair of ports
FromLinkableSelfNode and ToLinkableSelfNode, whether the user may draw a link between ports on the same node
FromMaxLinks and ToMaxLinks, to limit the double of links connecting with this port in a particular direction

See the Introduction page on ports and link routing and link connection points for port usage information and examples.

GraphObjects as labels on a Link

GraphObjects can also be used as "labels" on a Link. In addition to the AlignmentFocus property, these properties direct a Link Panel to position a "label" at a particular point along the route of the link, in a particular manner:

SegmentIndex, which segment the label should be on
SegmentFraction, how far along the segment the label should be
SegmentOffset, where the label should be positioned relative to the segment
SegmentOrientation, how the label should be rotated relative to the angle of the segment

See the Introduction page on link labels for examples of how to make use of labels on Links.

Interactive Behavior

There are several properties that specify fairly high-level interactive behavior:

Cursor, a CSS string specifying a cursor
ContextMenu, an Adornment
ToolTip, an Adornment

For more information, please read the Introduction page about Context Menus and the page about ToolTips.

Also see the Basic sample for examples of how to show context menus and tooltips.

Constructors

GraphObject()

This is an abstract class, so you should not use this constructor.

Declaration

public GraphObject()

Properties

ActionCancel

Gets or sets the function to execute when the ActionTool is cancelled and this GraphObject's IsActionable is set to true.

Declaration

public Action<InputEvent, GraphObject> ActionCancel { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject>

Remarks

This property is infrequently set. By default this property is null.

This functional property is only set on objects such as buttons, knobs, or sliders that want to handle all events, in conjunction with ActionTool, pre-empting the normal tool mechanisms.

The ActionTool does not conduct any transaction, so if this property has a value, the function will not be called within a transaction.

ActionDown

Gets or sets the function to execute on a mouse-down event when this GraphObject's IsActionable is set to true.

Declaration

public Action<InputEvent, GraphObject> ActionDown { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject>

Remarks

This property is infrequently set. By default this property is null.

This functional property is only set on objects such as buttons, knobs, or sliders that want to handle all events, in conjunction with ActionTool, pre-empting the normal tool mechanisms.

The ActionTool does not conduct any transaction, so if this property has a value, the function will not be called within a transaction.

ActionMove

Gets or sets the function to execute on a mouse-move event when this GraphObject's IsActionable is set to true.

Declaration

public Action<InputEvent, GraphObject> ActionMove { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject>

Remarks

This property is infrequently set. By default this property is null.

This functional property is only set on objects such as buttons, knobs, or sliders that want to handle all events, in conjunction with ActionTool, pre-empting the normal tool mechanisms.

The ActionTool does not conduct any transaction, so if this property has a value, the function will not be called within a transaction.

ActionUp

Gets or sets the function to execute on a mouse-up event when this GraphObject's IsActionable is set to true.

Declaration

public Action<InputEvent, GraphObject> ActionUp { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject>

Remarks

This property is infrequently set. By default this property is null.

This functional property is only set on objects such as buttons, knobs, or sliders that want to handle all events, in conjunction with ActionTool, pre-empting the normal tool mechanisms.

The ActionTool does not conduct any transaction, so if this property has a value, the function will not be called within a transaction. If you do provide a function that makes changes to the diagram or to its model, you should do so within a transaction -- call StartTransaction(string) and CommitTransaction(string).

ActualBounds

This read-only property returns the bounds of this GraphObject in container coordinates. This means that the actualBounds are in the coordinate space of the GraphObject's Panel, unless this is a Part, in which case they are in the Diagram's coordinate system.

Declaration

public Rect ActualBounds { get; protected set; }

Property Value

Type	Description
Rect

Remarks

You must not modify any of the properties of the Rect that is the value of this property.

If this GraphObject is a Part, then the x and y values of the actualBounds are identical to that Part's Position, and the width and height values of the actualBounds represent the rectangular space occupied by the Part in DocumentBounds coordinates.

If this GraphObject is not a top-level object (not a Part), then the actualBounds x and y values represent that GraphObject's position within its Panel. In a Panel of type PanelLayoutPosition this is identical to the GraphObject's Position, but in other cases it is dependent on the unique workings of each Panel type. The actualBounds width and height of a GraphObject are the final size after the Scale and Angle are applied.

It is possible for a GraphObject (be it an GraphObject or a Panel containing several more GraphObjects) to have no containing Part, in which case these GraphObjects cannot possibly be in a Diagram. These GraphObjects are unlikely to have real-double values for their actualBounds, as they may never have had the chance to be measured and arranged.

As with all read-only properties, using this property as a binding source is unlikely to be useful.

Alignment

Gets or sets the alignment Spot of this GraphObject used in Panel layouts, to determine where in the area allocated by the panel this object should be placed.

Declaration

public Spot Alignment { get; set; }

Property Value

Type	Description
Spot

Remarks

The default value is Default, which lets the Panel determine the Spot using DefaultAlignment. If that property is also Default, then the alignment spot will be different depending on the Panel type.

The AlignmentFocus is often used along with this property to specify where this object should be positioned in a Panel.

A Default is equivalent to Spot.Center in Spot, Auto, Horizontal, and Vertical panels. For examples of alignments in different panels, see the Introduction page on Panels.

AlignmentFocus

Gets or sets the spot on this GraphObject to be used as the alignment point in Spot and Fixed Panels.

Declaration

public Spot AlignmentFocus { get; set; }

Property Value

Type	Description
Spot

Remarks

Value must be of type Spot.

The default value is Default, which means that the Panel type can decide the effective alignment spot.

The Alignment is often used along with this property to specify where this object should be positioned in a Panel.

For PanelLayoutGraduated, the alignmentFocus spot determines the spot on a child element to be aligned with some point along the main element.

When you want a link label Node to be positioned by its location spot rather than by this alignmentFocus spot, you can set this property to None, only on Nodes.

For examples of alignments in different panels, see the Introduction page on Panels.

Angle

Gets or sets the angle transform, in degrees, of this GraphObject.

Declaration

public double Angle { get; set; }

Property Value

Type	Description
double

Remarks

Value must be a double. If the value is not between (0 <= value < 360), it will be normalized to be in that range. Zero is along the positive X-axis (rightwards); 90 is along the positive Y-axis (downwards). Default is 0.

When set on a Graduated Panel's TextBlock label, this value will be be ignored if SegmentOrientation is not None, Along, or Upright. Along and Upright will use this angle relative to the slope of the main path.

When set on a Link label, this value will be be ignored if SegmentOrientation is not None.

Background

Gets or sets the background Brush of this GraphObject, filling the rectangle of this object's local coordinate space.

Declaration

public Brush Background { get; set; }

Property Value

Type	Description
Brush

Remarks

If the object is rotated, the background will rotate with it.

The value may be either a Brush object or a string that is a CSS color. The default value is null -- no background is drawn. More information about the syntax of CSS color strings is available at: CSS colors (mozilla.Org).

Click

Gets or sets the function to execute when the user single-primary-clicks on this object. This typically involves a mouse-down followed by a prompt mouse-up at approximately the same position using the left (primary) mouse button.

Declaration

public Action<InputEvent, GraphObject> Click { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject>

Remarks

This property is used by the ClickSelectingTool when the user clicks on a GraphObject. The function is called in addition to the ElementSingleClicked handler.

If this property value is a function, it is called with an InputEvent and this GraphObject. The TargetElement provides the GraphObject that was found at the mouse point before looking up the visual tree of Panels to get to this object.

From the second argument, obj, you can get to the Node or Link via the Part property. From there you can access the bound data via the Data property. So from an event handler you can get the bound data by obj.Part.Data.

By default this property is null.

Objects in Layers that are IsTemporary do not receive click events. If you do want such objects to respond to clicks, set IsActionable to true.

If you do provide a function that makes changes to the diagram or to its model, you should do so within a transaction -- call StartTransaction(string) and CommitTransaction(string).

An example of a click event handler is shown in the Arrowheads sample.

Column

Gets or sets the column of this GraphObject if it is in a Table Panel.

Declaration

public int Column { get; set; }

Property Value

Type	Description
int

Remarks

The value must be a small non-negative integer. The default is 0.

ColumnSpan

Gets or sets the double of columns spanned by this GraphObject if it is in a Table Panel.

Declaration

public int ColumnSpan { get; set; }

Property Value

Type	Description
int

Remarks

The value must be a small positive integer. The default is 1.

ContextClick

Gets or sets the function to execute when the user single-secondary-clicks on this object. This typically involves a mouse-down followed by a prompt mouse-up at approximately the same position using the right (secondary) mouse button.

Declaration

public Action<InputEvent, GraphObject> ContextClick { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject>

Remarks

This property is used by the ClickSelectingTool when the user clicks on a GraphObject. The function is called in addition to the ElementContextClicked handler.

By default this property is null.

Objects in Layers that are IsTemporary do not receive click events. If you do want such objects to respond to clicks, set IsActionable to true.

If you do provide a function that makes changes to the diagram or to its model, you should do so within a transaction -- call StartTransaction(string) and CommitTransaction(string).

ContextMenu

This context menu is shown upon a context click on this object. This value is typically an Adornment, which implements IShowHidable.

Declaration

public IShowHidable ContextMenu { get; set; }

Property Value

Type	Description
IShowHidable

Remarks

The default value is null, which means no context menu is shown.

Changing this value will not modify or remove any existing menu that is being shown for this object.

Context menus may also depend on having the same data binding as the adorned Part (i.e. the same value for Data).

Context menus are not copied by Copy(), so that context menus may be shared by all instances of a template.

A typical context menu is implemented as an Adornment with several buttons in it. For example, this context menu is defined in the Dynamic Port sample:

var nodeMenu =  // context menu for each Node
  Builder.Make<Adornment>("ContextMenu")
    .Add(
      Builder.Make<Panel>("ContextMenuButton")
        .Add(new TextBlock("Add top port"))
        .Set(new { Click = new Action<InputEvent, GraphObject>((e, obj) => { AddPort("top"); }) }),
      Builder.Make<Panel>("ContextMenuButton")
        .Add(new TextBlock("Add left port"))
        .Set(new { Click = new Action<InputEvent, GraphObject>((e, obj) => { AddPort("left"); }) }),
      Builder.Make<Panel>("ContextMenuButton")
        .Add(new TextBlock("Add right port"))
        .Set(new { Click = new Action<InputEvent, GraphObject>((e, obj) => { AddPort("right"); }) }),
      Builder.Make<Panel>("ContextMenuButton")
        .Add(new TextBlock("Add bottom port"))
        .Set(new { Click = new Action<InputEvent, GraphObject>((e, obj) => { AddPort("bottom"); }) })
    );

and is used in the node template:

myDiagram.NodeTemplate =
  new Node(PanelLayoutTable.Instance) { ..., ContextMenu = nodeMenu } ...;

Context menus are normally positioned by PositionContextMenu(Adornment, GraphObject). However, if there is a Placeholder in the context menu, the context menu (i.e. an Adornment) will be positioned so that the Placeholder is at the same position as this adorned GraphObject.

The Basic sample also shows how to make context menu items invisible when the command is disabled.

Replacing this value will not modify or remove any existing context menu that is being shown for this object.

Read more about context menus at Context Menus.

Cursor

Gets or sets the mouse cursor to use when the mouse is over this object with no mouse buttons pressed.

Declaration

public string Cursor { get; set; }

Property Value

Type	Description
string

Remarks

The value is null when no particular cursor is specified for this object; the actual cursor is determined by any containing Panel.

The default value is the empty string, which means the current mouse cursor is determined by the Diagram. Other strings should be valid CSS strings that specify a cursor. This provides some more information about cursor syntax: CSS cursors (mozilla.Org).

CustomProperties

This write-only property allows for setting multiple programmer-defined properties.

Declaration

public object CustomProperties { set; }

Property Value

Type	Description
object

Remarks

The object should be an anonymous type object containing property names, beginning with "_", and their corresponding values.

// standalone set
myNode.CustomProperties =  new {
  _ExtraString = "hello",
  _ExtraPoint = new Point(5, 5)
};

// more common, within a call to GraphObject.Set
myNode.Set(new Node {
  LocationSpot = Spot.Center,
  FromSpot = Spot.BottomRightSides,
  ToSpot = Spot.TopLeftSides,
  CustomProperties = new {
    _ExtraString = "hello",
    _ExtraPoint = new Point(5, 5)
  }
});

DesiredSize

Gets or sets the desired size of this GraphObject in local coordinates.

Declaration

public Size DesiredSize { get; set; }

Property Value

Type	Description
Size

Remarks

Value must be of type Size. Default is Size(double.NaN, double.NaN). You cannot modify the width or height of the value of this property -- if you want to change the desiredSize you must set this property to a different Size.

Getting or setting Width or Height is equivalent to getting or setting the width or height of this property.

The size does not include any transformation due to Scale or Angle, nor any pen thickness due to StrokeWidth if this is a Shape. If there is a containing Panel the Panel will determine the actual size. If the desiredSize is greater than the allowed size that the GraphObject's Panel determines, then the GraphObject may be visually clipped. If the desiredSize does not meet the constraints of MinSize and MaxSize, the GraphObject will be resized to meet them.

Diagram

This read-only property returns the Diagram that this GraphObject is in, if it is.

Declaration

public virtual Diagram Diagram { get; }

Property Value

Type	Description
Diagram

Remarks

This property is not settable. Although you cannot add any plain GraphObject to a Diagram, you can call Add(Part) to add a Part to a Diagram.

DoubleClick

Gets or sets the function to execute when the user double-primary-clicks on this object. This typically involves a mouse-down/up/down/up in rapid succession at approximately the same position using the left (primary) mouse button.

Declaration

public Action<InputEvent, GraphObject> DoubleClick { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject>

Remarks

This property is used by the ClickSelectingTool when the user clicks on a GraphObject. The function is called in addition to the ElementDoubleClicked handler.

By default this property is null.

Objects in Layers that are IsTemporary do not receive click events. If you do want such objects to respond to clicks, set IsActionable to true.

If you do provide a function that makes changes to the diagram or to its model, you should do so within a transaction -- call StartTransaction(string) and CommitTransaction(string).

myDiagram.NodeTemplate =
  new Node(...) {
      ...,
      // second arg will be this GraphObject, which in this case is the Node itself:
      DoubleClick = (e, obj) => {
        var d = ((Node)obj).Data as MyNodeData;
        Console.WriteLine("Node key is " + d.Key);
      }
    } ... ;

EnabledChanged

Gets or sets the function to execute when some containing Panel changes the value of IsEnabled.

Declaration

public Action<GraphObject, bool> EnabledChanged { get; set; }

Property Value

Type	Description
Action<GraphObject, bool>

Remarks

It is typically used to modify the appearance of the object. This function must not change the value of any panel IsEnabled.

If this property value is a function, it is called with two arguments, this GraphObject and the new value. By default this property is null -- no function is called.

FromEndSegmentLength

Gets or sets the length of the first segment of a link coming from this port.

Declaration

public virtual double FromEndSegmentLength { get; set; }

Property Value

Type	Description
double

Remarks

This value is used when the computed "from spot" is not None. The default value is 10. This value also limits how short the FromShortLength may be drawn.

The value of FromEndSegmentLength, if not double.NaN, takes precedence over the value at this port when determining the route of the link.

For examples of how to use this property, see Link End Segment Lengths.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node.

FromLinkable

Gets or sets whether the user may draw Links from this port.

Declaration

public bool? FromLinkable { get; set; }

Property Value

Type	Description
bool?

Remarks

This property is used by IsValidFrom(Node, GraphObject).

The default value is null, which indicates that the real value is inherited from the parent Panel, or false if there is no containing panel.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node, or unless you are disabling the "linkability" of a particular GraphObject inside a Panel whose fromLinkable has been set or bound to true.

FromLinkableDuplicates

Gets or sets whether the user may draw duplicate Links from this port.

Declaration

public bool FromLinkableDuplicates { get; set; }

Property Value

Type	Description
bool

Remarks

This property is used by IsValidLink(Node, GraphObject, Node, GraphObject).

The default value is false.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node.

FromLinkableSelfNode

Gets or sets whether the user may draw Links that connect from this port's Node.

Declaration

public bool FromLinkableSelfNode { get; set; }

Property Value

Type	Description
bool

Remarks

This property is used by IsValidLink(Node, GraphObject, Node, GraphObject).

The default value is false.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node.

FromMaxLinks

Gets or sets the maximum double of links that may come out of this port.

Declaration

public double FromMaxLinks { get; set; }

Property Value

Type	Description
double

Remarks

This property is used by IsValidFrom(Node, GraphObject).

The value must be non-negative. The default value is Infinity.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node.

FromShortLength

Gets or sets how far the end segment of a link coming from this port stops short of the actual port.

Declaration

public virtual double FromShortLength { get; set; }

Property Value

Type	Description
double

Remarks

Positive values are limited by the FromEndSegmentLength or FromEndSegmentLength. Negative values cause the link to extend into the port. The default value is zero.

This property is useful when you have a thick link and a pointy arrowhead. Normally the link Shape extends all the way to the end of the arrowhead. If the link Shape is wide, its edges will be seen behind the arrowhead. By setting this property to a small positive value, the link Shape can end within the body of the arrowhead, leaving only the point of the arrowhead visible at the end of the link.

A negative value for this property can also be useful when you want the link Shape to continue into the port, perhaps because a portion of the port is transparent and you want the link to appear to connect visually with a different point on the node.

The value of FromShortLength, if not double.NaN, takes precedence over the value at this port when determining the route of the link.

For examples of how to use this property, see Link Connection Points.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node.

FromSpot

Gets or sets where a link should connect from this port.

Declaration

public Spot FromSpot { get; set; }

Property Value

Type	Description
Spot

Remarks

The default value is None, meaning that the link routing must consider the shape of the port and connect at the closest point.

The value of FromSpot, if not Default, takes precedence over the value at this port when determining the route of the link. A number of the predefined Layouts automatically set FromSpot and ToSpot, thereby causing this property and ToSpot on the port element to be ignored. Depending on the layout, you may be able to disable that behavior, such as by setting SetsPortSpot(s) or SetChildPortSpot to false.

For examples of how to use this property, see Link Connection Points.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node.

Height

Gets or sets the desired height of this GraphObject in local coordinates. This just gets or sets the height component of the DesiredSize.

Declaration

public double Height { get; set; }

Property Value

Type	Description
double

Remarks

Default is double.NaN.

Size can also be constrained by setting MinSize and MaxSize.

The height does not include any transformation due to Scale or Angle, nor any pen thickness due to StrokeWidth if this is a Shape. If there is a containing Panel the Panel will determine the actual size.

IsActionable

This property determines whether or not this GraphObject's events occur before all other events, including selection. This enables the ActionDown, ActionMove, ActionUp, and ActionCancel events, which are all handled by the ActionTool.

Declaration

public bool IsActionable { get; set; }

Property Value

Type	Description
bool

Remarks

This object does not get any mouse/touch events if it is not Visible or if it is not Pickable.

This property is infrequently used -- typically only when implementing objects that act as buttons or knobs or sliders. The default value is false.

IsPanelMain

Gets or sets whether a GraphObject is the "main" object for some types of Panel.

Declaration

public bool IsPanelMain { get; set; }

Property Value

Type	Description
bool

Remarks

Panels that use a "main" object include PanelLayoutAuto, PanelLayoutSpot, and PanelLayoutLink.

Panels that use a "main" object will use the first object that has this property set to true, or else just the first object, if none have the property set.

Do not modify this property once this object is an element of a panel.

this[string]

This index operator allows for access to programmer-defined properties stored in a Dictionary<string, object>.

Declaration

public object this[string prop] { get; set; }

Parameters

Type	Name	Description
string	prop	the property name, which must begin with a _

Property Value

Type	Description
object

Layer

This read-only property returns the GraphObject's containing Layer, if there is any. A plain GraphObject cannot belong directly to a Layer -- only a Part can belong directly to a Layer.

Declaration

public virtual Layer Layer { get; }

Property Value

Type	Description
Layer

Remarks

This property is not settable. Normally one changes which Layer that a GraphObject is in by setting LayerName. Adding a Part to a Diagram will automatically add that Part to a Layer in that Diagram based on the layerName.

Margin

Gets or sets the size of empty area around this GraphObject, as a Margin, in the containing Panel coordinates.

Declaration

public Margin Margin { get; set; }

Property Value

Type	Description
Margin

Remarks

Negative values are permitted but may cause overlaps with adjacent objects in a Panel. You cannot modify the top or left or right or bottom of the value of this property -- if you want to change the margin you must set this property to a different Margin. Default margin is Margin(0,0,0,0).

The property setter accepts a double instead of a Margin object: providing a double N will result in using a Margin(N, N, N, N). The property getter will always return a Margin.

MaxSize

Gets or sets the maximum size of this GraphObject in container coordinates (either a Panel or the document).

Declaration

public Size MaxSize { get; set; }

Property Value

Type	Description
Size

Remarks

Any new value must be of type Size; double.NaN values are treated as Infinity. If you want no maximum width or height, use double.NaN or Infinity.

You cannot modify the width or height of the value of this property -- if you want to change the maxSize you must set this property to a different Size. The default value is Infinity by Infinity. A containing Panel will determine the actual size of this object.

MeasuredBounds

This read-only property returns the measuredBounds of the GraphObject in container coordinates (either a Panel or the document). This describes the transformed bounds with margins excluded.

Declaration

public Rect MeasuredBounds { get; }

Property Value

Type	Description
Rect

Remarks

You must not modify any of the properties of the Rect that is the value of this property.

As with all read-only properties, using this property as a binding source is unlikely to be useful.

MinSize

Gets or sets the minimum size of this GraphObject in container coordinates (either a Panel or the document).

Declaration

public Size MinSize { get; set; }

Property Value

Type	Description
Size

Remarks

Any new value must be of type Size; double.NaN values are treated as 0.

You cannot modify the width or height of the value of this property -- if you want to change the minSize you must set this property to a different Size. The default value is zero by zero. A containing Panel will determine the actual size of this object.

MouseDragEnter

Gets or sets the function to execute when the user moves the mouse into this stationary object during a DraggingTool drag; this allows you to provide feedback during a drag based on where it might drop.

Declaration

public Action<InputEvent, GraphObject, GraphObject> MouseDragEnter { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject, GraphObject>

Remarks

If this property value is a function, it is called with an InputEvent, this GraphObject, and any previous GraphObject. The TargetElement provides the GraphObject that was found at the mouse point before looking up the visual tree of Panels to get to this object. By default this property is null.

Note that for a drag-and-drop that originates in a different diagram, the target diagram's selection collection will not be the parts that are being dragged. Instead the temporary parts being dragged can be found as the source diagram's CopiedParts.

This function is called with SkipsUndoManager temporarily set to true, so that any changes to GraphObjects are not recorded in the UndoManager. You do not need to start and commit any transaction in this function, because the DraggingTool will be conducting one already. After calling this function the diagram will be updated immediately.

For an example of a mouseDragEnter event handler, see the node template in the Org Chart Editor sample.

MouseDragLeave

Gets or sets the function to execute when the user moves the mouse out of this stationary object during a DraggingTool drag; this allows you to provide feedback during a drag based on where it might drop.

Declaration

public Action<InputEvent, GraphObject, GraphObject> MouseDragLeave { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject, GraphObject>

Remarks

If this property value is a function, it is called with an InputEvent, this GraphObject, and any new GraphObject that the mouse is in. The TargetElement provides the GraphObject that was found at the mouse point before looking up the visual tree of Panels to get to this object. By default this property is null.

For an example of a mouseDragLeave event handler, see the node template in the Org Chart Editor sample.

MouseDrop

Gets or sets the function to execute when a user drops the selection on this object at the end of a DraggingTool drag; this allows you to customize the behavior when a drop occurs on an object.

Declaration

public Action<InputEvent, GraphObject> MouseDrop { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject>

Remarks

If this property value is a function, it is called with an InputEvent, this GraphObject. The TargetElement provides the GraphObject that was found at the mouse point before looking up the visual tree of Panels to get to this object. The function is called within the transaction performed by the DraggingTool, so you do not need to conduct one. By default this property is null.

For an example of a mouseDrop event handler, see the node template in the Org Chart Editor sample.

MouseEnter

Gets or sets the function to execute when the user moves the mouse into this object without holding down any buttons.

Declaration

public Action<InputEvent, GraphObject, GraphObject> MouseEnter { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject, GraphObject>

Remarks

This property is used by the ToolManager.

If this property value is a function, it is called with an InputEvent, this GraphObject that the mouse is now in, and any previous GraphObject that the mouse was in. The TargetElement provides the GraphObject that was found at the mouse point before looking up the visual tree of Panels to get to this object. By default this property is null.

This function is called with SkipsUndoManager temporarily set to true, so that any changes to GraphObjects are not recorded in the UndoManager. You do not need to start and commit any transaction in this function. After calling this function the diagram will be updated immediately.

For example, consider the situation where one wants to display buttons that the user can click whenever the user passes the mouse over a node, and the buttons automatically disappear when the mouse leaves the node. This can be implemented by showing an Adornment holding the buttons.

var nodeContextMenu =
  new Adornment("Spot")
    { Background = "transparent" }
    .Add(
      new Placeholder(),
      new Panel("Vertical")
        { Alignment = Spot.Right, AlignmentFocus = Spot.Left }
        .Add(
          Builder.Make<Panel>("Button")
            .Add(new TextBlock("Command 1"))
            .Set(new {
              Click = new Action<InputEvent, GraphObject>((e, obj) => {
                var node = ((Adornment)obj.Part).AdornedPart;
                Console.WriteLine("Command 1 on " + ((MyNodeData)node.Data).Text);
                node.RemoveAdornment("ContextMenuOver");
              })
            }),
          Builder.Make<Panel>("Button")
            .Add(new TextBlock("Command 2"))
            .Set(new {
              Click = new Action<InputEvent, GraphObject>((e, obj) => {
                var node = ((Adornment)obj.Part).AdornedPart;
                Console.WriteLine("Command 2 on " + ((MyNodeData)node.Data).Text);
                node.RemoveAdornment("ContextMenuOver");
              })
            })
        )
    );

Then in the definition of the Node we can implement a MouseEnter event handler:

myDiagram.NodeTemplate =
  new Node {
    ...,
    MouseEnter = (e, obj, _) => {
      var node = (Node)obj;
      nodeContextMenu.AdornedElement = node;
      nodeContextMenu.MouseLeave = (ev, cm, _) => {
        node.RemoveAdornment("ContextMenuOver");
      };
      node.AddAdornment("ContextMenuOver", nodeContextMenu);
    }
  } ...;

Note how it automatically defines a MouseLeave event handler too. The context menu Adornment is removed either when the mouse leaves the area of the Adornment or when the user executes a button click event handler.

MouseHold

Gets or sets the function to execute when the user holds the mouse still for a while over this object while holding down a button.

Declaration

public Action<InputEvent, GraphObject> MouseHold { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject>

Remarks

This property is used by the ToolManager.

If this property value is a function, it is called with an InputEvent. By default this property is null.

If you do provide a function that makes changes to the diagram or to its model, you should do so within a transaction -- call StartTransaction(string) and CommitTransaction(string).

You can control how long the user must wait during a drag with a motionless mouse before a "mouse hold" event occurs, by setting HoldDelay. For example:

myDiagram.ToolManager.HoldDelay = 500;  // 500 milliseconds

Declaration

public Action<InputEvent, GraphObject> MouseHover { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject>

Remarks

This property is used by the ToolManager.

If this property value is a function, it is called with an InputEvent. By default this property is null.

If you do provide a function that makes changes to the diagram or to its model, you should do so within a transaction -- call StartTransaction(string) and CommitTransaction(string).

You can control how long the user must wait with a motionless mouse before a "mouse hover" event occurs, by setting HoverDelay. For example:

myDiagram.ToolManager.HoverDelay = 500;  // 500 milliseconds

Declaration

public Action<InputEvent, GraphObject, GraphObject> MouseLeave { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject, GraphObject>

Remarks

This property is used by the ToolManager.

If this property value is a function, it is called with an InputEvent, this GraphObject that the mouse has left, and any next GraphObject that the mouse is now in. The TargetElement provides the GraphObject that was found at the mouse point before looking up the visual tree of Panels to get to this object. By default this property is null.

This function is called with SkipsUndoManager temporarily set to true, so that any changes to GraphObjects are not recorded in the UndoManager. You do not need to start and commit any transaction in this function. After calling this function the diagram will be updated immediately.

For example, the Flow Chart sample automatically shows and hides the ports as the mouse passes over a node. The node template includes the following settings:

myDiagram.NodeTemplate =
  new Node {
    ...,
    // handle mouse enter/leave events to show/hide the ports
    MouseEnter = (e, obj, _) => { showPorts(obj.Part, true); },
    MouseLeave = (e, obj, _) => { showPorts(obj.Part, false); }
  } ...;

where the showPorts function is defined to set the Visible property of each of the port elements of the node.

MouseOver

Gets or sets the function to execute when the user moves the mouse over this object without holding down any buttons.

Declaration

public Action<InputEvent, GraphObject> MouseOver { get; set; }

Property Value

Type	Description
Action<InputEvent, GraphObject>

Remarks

This property is used by the ToolManager. This property is infrequently used -- it is more common to implement MouseEnter and MouseLeave functions.

This function is called with SkipsUndoManager temporarily set to true, so that any changes to GraphObjects are not recorded in the UndoManager. You do not need to start and commit any transaction in this function. After calling this function the diagram will be updated immediately.

Name

Gets or sets the name for this object.

Declaration

public string Name { get; set; }

Property Value

Type	Description
string

Remarks

The default value is the empty string. The name should be unique within a Panel, although if it isn't, it reduces the usefulness of methods such as FindElement(string).

You must not modify the name of a GraphObject once it is in the visual tree of a Part.

This is frequently needed to identify a particular GraphObject in the visual tree of a Part, for example as the value of the LocationElementName or SelectionElementName properties.

NaturalBounds

This read-only property returns the natural bounding rectangle of this GraphObject in local coordinates, before any transformation by Scale or Angle, and before any resizing due to MinSize or MaxSize or Stretch.

Declaration

public virtual Rect NaturalBounds { get; }

Property Value

Type	Description
Rect

Remarks

Defaults to unknown (double.NaN,double.NaN).

You must not modify any of the properties of the Rect that is the value of this property.

The value can only be changed by changing properties of the particular GraphObject, such as DesiredSize, Geometry, or Font.

As with all read-only properties, using this property as a binding source is unlikely to be useful.

Opacity

Gets or sets the multiplicative opacity for this GraphObject and (if a Panel) all elements.

Declaration

public double Opacity { get; set; }

Property Value

Type	Description
double

Remarks

The value must be between 0.0 (fully transparent) and 1.0 (no additional transparency).

Unlike Visible, Opacity only affects drawing, it does not cause objects to be resized or remeasured. Opacity settings do not change the shape of the object or exclude it from object-picking (does not change whether any objects are found by the "find..." methods).

This value is multiplicative with any existing transparency, for instance from Opacity or a GraphObject's opacity higher in the visual tree, or from a Brush or image transparency. The default value is 1.

Panel

This read-only property returns the GraphObject's containing Panel, or null if this object is not in a Panel.

Declaration

public Panel Panel { get; }

Property Value

Type	Description
Panel

Remarks

Although Part inherits from this class, a Part will never belong to a Panel, so this property will always be null for every Node or Link.

This property is not settable. Instead, call Add(params GraphObject[]) in order to put a GraphObject in a Panel.

Part

This read-only property returns the Part containing this object, if any. The Part will be the root GraphObject in this GraphObject's visual tree.

Declaration

public Part Part { get; }

Property Value

Type	Description
Part

Remarks

It is common to refer to the containing Part of a GraphObject in order to refer to the Data to which it is bound.

This property is not settable. If you want this GraphObject to belong to a Part, you will need to add it to a Part, or else add it to some visual tree structure that is added to a Part using Add(params GraphObject[]).

Note that for objects such as buttons that are in Adornments such as tooltips or context menus, this property will return that Adornment, not the Node or Link that is adorned.

If you want to find a Group that contains a Part, use the ContainingGroup property: someObj.Part.ContainingGroup

Pickable

Gets or sets whether or not this GraphObject can be chosen by visual "find" or "hit-test" methods such as FindElementAt(Point, Func<GraphObject, GraphObject>, Predicate<GraphObject>).

Declaration

public bool Pickable { get; set; }

Property Value

Type	Description
bool

Remarks

This object does not get any mouse/touch events if it is not Visible or if it is not Pickable.

The default value is true -- mouse events on this object will be noticed. If this value is false and this object is a Panel, not only is this Panel not "hittable", but all of the elements inside the Panel will be ignored.

PortId

Gets or sets an identifier for an object acting as a port on a Node.

Declaration

public string PortId { get; set; }

Property Value

Type	Description
string

Remarks

The default value is null -- this object is not a port.

A value that is the empty string is used by convention to mean the primary (and usually only) port of the node.

If a Node has no named ports, then the Node itself is the sole port.

Note: the only kind of model that can save port information, i.e. portIds that are not an empty string, for links is a GraphLinksModel<TNodeData, TNodeKey, TSharedData, TLinkData, TLinkKey, TPort> whose LinkFromPortIdProperty and LinkToPortIdProperty have been set to name properties on the link data objects.

The value should be unique within the Node. You must not modify this property once this GraphObject is in the visual tree of a Node.

See the Introduction page on ports for usage information and examples.

Position

Gets or sets the position of this GraphObject in container coordinates (either a Panel or the document).

Declaration

public Point Position { get; set; }

Property Value

Type	Description
Point

Remarks

Value must be of type Point. You cannot modify the x or y of the value of this property -- if you want to change the position you must set this property to a different Point. Default is Point(double.NaN, double.NaN).

For Parts, see also Location.

Row

Gets or sets the row of this GraphObject if it is in a Table Panel.

Declaration

public int Row { get; set; }

Property Value

Type	Description
int

Remarks

The value must be a small non-negative integer. The default is 0.

RowSpan

Gets or sets the double of rows spanned by this GraphObject if it is in a Table Panel.

Declaration

public int RowSpan { get; set; }

Property Value

Type	Description
int

Remarks

The value must be a small positive integer. The default is 1.

Scale

Gets or sets the scale transform of this GraphObject.

Declaration

public double Scale { get; set; }

Property Value

Type	Description
double

Remarks

Value must be a double; larger values will make this object appear bigger. Default is 1.

SegmentFraction

Gets or sets the fractional distance along a segment of a GraphObject that is in a Link.

Declaration

public double SegmentFraction { get; set; }

Property Value

Type	Description
double

Remarks

The value should be between zero and one, where zero is at the point at the start of the segment, and where one is at the point at the end of the segment. The default value is zero.

If SegmentIndex is set to double.NaN, the fractional distance will be calculated along the entire link route.

For examples of how to use this property, see Link Labels.

SegmentIndex

Gets or sets the segment index of a GraphObject that is in a Link.

Declaration

public double SegmentIndex { get; set; }

Property Value

Type	Description
double

Remarks

Non-negative numbers count up from zero, which is the first segment, at the "from" end of the Link. Negative numbers count segments from the "to" end of the Link, where -1 means the last segment and -2 means the next-to-last segment. The default value is double.NegativeInfinity. The value should be an integer or double.NaN.

Setting this value to double.NaN means SegmentFraction's fractional distance will be calculated along the entire link route. A double.NaN value also means the MidPoint and MidAngle will not be used when determining label positions.

If you do not set this property, the Link will choose a place that is approximately at the mid-point of the link's route.

For examples of how to use this property, see Link Labels.

SegmentOffset

Gets or sets the offset of a GraphObject that is in a Link from a point on a segment or in a PanelLayoutGraduated from a point along the main element.

Declaration

public Point SegmentOffset { get; set; }

Property Value

Type	Description
Point

Remarks

The X component of the Point indicates the distance along the route, with positive values going further toward the "to" end of the link or panel. The Y component of the Point indicates the distance away from the route, with positive values towards the right as seen when facing further towards the "to" end of the link or panel. The value defaults to the Point (0, 0). You cannot modify the x or y of the value of this property -- if you want to change the SegmentOffset you must set this property to a different Point.

For labels that are near either end of a link, it may be convenient to set the segmentOffset to Point(double.NaN, double.NaN). This causes the offset to be half the width and half the height of the label object.

For examples of how to use this property, see Link Labels.

Declaration

public Orientation SegmentOrientation { get; set; }

Property Value

Type	Description
Orientation

Remarks

The only accepted values are the Link "Orient..." values of Link and the default value: None.

When the value is None, the Angle of this object is unchanged as the link is routed. Setting this to a value of Along will cause routing to set the Angle to be the angle of the segment that this object is on. Other values compute the angle somewhat differently. If the value is changed back to None, the Angle of this object is set to zero.

Note that when this property is not None, this property takes precedence over any setting or binding of the Angle property. Changes to the angle caused by orientation might not result in Changed events, and any original value for the angle may be lost.

In the case of Graduated Panels, if this value is None, Along, or Upright, any TextBlock label Angle will be respected. Depending on this value, the effective TextBlock angle will be either fixed or relative to the slope of the path where it is rendered.

For examples of how to use this property, see Link Labels.

ShadowVisible

Gets or sets whether or not this GraphObject will be shadowed inside a Part that has IsShadowed set to true.

Declaration

public bool? ShadowVisible { get; set; }

Property Value

Type	Description
bool?

Remarks

The default is null, which means this GraphObject will obey the default shadow rules (see IsShadowed).

A value of true or false will ensure that this part is shadowed or not regardless of the default shadow rules, but this GraphObject's shadowed status will not affect other GraphObjects in the Part.

Typically this property does not need to be set, but you may need to set this value to false on GraphObjects inside a Part that you do not wish to be shadowed.

Stretch

Gets or sets the stretch of the GraphObject. This controls whether the width and/or height of this object automatically adjusts to fill the area allotted by the containing Panel.

Declaration

public Stretch Stretch { get; set; }

Property Value

Type	Description
Stretch

Remarks

The only accepted values are listed as constant properties of GraphObject, such as None, Fill, Horizontal, or Vertical. The default value is Default, which allows the Panel to decide how to treat this object, depending on the type of Panel.

Objects with an Angle that are stretched may look incorrect unless the angle is a multiple of 90.

Stretch will have have different effects based upon the Panel containing this object. Elements of:

Auto panels will not stretch, except the main element growing to fill the panel or being made uniform
Horizontal panels will only stretch vertically
Vertical panels will only stretch horizontally
Spot panels will stretch to the size of the main element
Table panels will stretch to the size of their cell, defined by their row and column, which is usually determined by other GraphObjects in that cell that are not stretching
Grid panels, Link panels, and Graduated panels will not stretch

ToEndSegmentLength

Gets or sets the length of the last segment of a link going to this port.

Declaration

public virtual double ToEndSegmentLength { get; set; }

Property Value

Type	Description
double

Remarks

This value is used when the computed "to spot" is not None. The default value is 10.

The value of ToEndSegmentLength, if not double.NaN, takes precedence over the value at this port when determining the route of the link. This value also limits how short the ToShortLength may be drawn.

For examples of how to use this property, see Link End Segment Lengths.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node.

ToLinkable

Gets or sets whether the user may draw Links to this port.

Declaration

public bool? ToLinkable { get; set; }

Property Value

Type	Description
bool?

Remarks

This property is used by IsValidTo(Node, GraphObject).

The default value is null, which indicates that the real value is inherited from the parent Panel, or false if there is no containing panel.

ToLinkableDuplicates

Gets or sets whether the user may draw duplicate Links to this port.

Declaration

public bool ToLinkableDuplicates { get; set; }

Property Value

Type	Description
bool

Remarks

This property is used by IsValidLink(Node, GraphObject, Node, GraphObject).

The default value is false.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node.

ToLinkableSelfNode

Gets or sets whether the user may draw Links that connect to this port's Node.

Declaration

public bool ToLinkableSelfNode { get; set; }

Property Value

Type	Description
bool

Remarks

This property is used by IsValidLink(Node, GraphObject, Node, GraphObject).

The default value is false.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node.

ToMaxLinks

Gets or sets the maximum number of links that may go into this port.

Declaration

public double ToMaxLinks { get; set; }

Property Value

Type	Description
double

Remarks

This property is used by IsValidTo(Node, GraphObject).

The value must be non-negative. The default value is Infinity.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node.

Declaration

public IShowHidable ToolTip { get; set; }

Property Value

Type	Description
IShowHidable

The default value is null, which means no tooltip is shown.

A typical tooltip is defined in the following manner, as taken from the Kitten Monitor sample:

myDiagram.NodeTemplate =
  new Node {
    ...,
    // this tooltip shows the name and picture of the kitten
    ToolTip =
      Builder.Make<Adornment>("ToolTip")
        .Add(
          new Panel(PanelLayoutVertical.Instance)
            .Add(
              new Picture()
                .Bind("Source", "Src", (s, _) => { return "images/" + s + ".png"; }),
              new TextBlock { Margin = 3 }
                .Bind("Text", "Key")
            )
        )
  } ...;

Note that this Adornment depends on having the same data binding as the adorned Part (i.e. the same value for Data).

Tooltips are not copied by Copy(), so that tooltips may be shared by all instances of a template.

Tooltips are shown after a timed delay given by the HoverDelay. You can change the delay time by:

myDiagram.ToolManager.HoverDelay = 500;  // 500 milliseconds

Tooltips are normally positioned by PositionToolTip(Adornment, GraphObject). However, if there is a Placeholder in the tooltip, the tooltip (i.e. an Adornment) will be positioned so that the Placeholder is at the same position as this adorned GraphObject.

Replacing this value will not modify or remove any existing tooltip that is being shown for this object.

ToShortLength

Gets or sets how far the end segment of a link going to this port stops short of the actual port.

Declaration

public virtual double ToShortLength { get; set; }

Property Value

Type	Description
double

Remarks

Positive values are limited by the ToEndSegmentLength or ToEndSegmentLength. Negative values cause the link to extend into the port. The default value is zero.

The value of ToShortLength, if not double.NaN, takes precedence over the value at this port when determining the route of the link.

For examples of how to use this property, see Link Connection Points.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node.

ToSpot

Gets or sets where a link should connect to this port.

Declaration

public virtual Spot ToSpot { get; set; }

Property Value

Type	Description
Spot

Remarks

The default value is None, meaning that the link routing must consider the shape of the port and connect to the closest point.

The value of ToSpot, if not Default, takes precedence over the value at this port when determining the route of the link. A number of the predefined Layouts automatically set FromSpot and ToSpot, thereby causing this property and FromSpot on the port element to be ignored. Depending on the layout, you may be able to disable that behavior, such as by setting SetsPortSpot(s) or SetChildPortSpot to false.

For examples of how to use this property, see Link Connection Points.

You must set this property on a GraphObject whose PortId is non-null, unless the whole Node is acting as a single port, in which case this property should be set on the Node.

Visible

Gets or sets whether a GraphObject is visible.

Declaration

public bool Visible { get; set; }

Property Value

Type	Description
bool

Remarks

The default value is true. A not visible object takes no space in the Panel that it is in. Toggling visibility may cause elements in the visual tree to re-measure and re-arrange. Making a Panel not visible causes all of its elements not to be seen or receive input events. Changing a Panel to become visible causes all of its elements to be seen and be active, unless those elements are themselves not visible.

This object does not get any mouse/touch events if it is not Visible or if it is not Pickable.

One can have a visible Shape that is not drawn by setting its Fill and Stroke to null or to "transparent". Similarly, one can set Stroke to null or to "transparent". It is also possible make a GraphObjects transparent by setting Opacity to 0. Finally, one can make a whole Layer-full of Parts invisible by setting Visible to false.

Use the IsVisibleElement() predicate to see if this GraphObject is visible and is inside a Panel that is IsVisibleElement(), and so forth up the chain of panels until reaching the Part.

For Parts, you can call the IsVisible() predicate to determine if not only the Part is visible but also any containing Group or Link, and whether the Layer it is in is visible.

Width

Gets or sets the desired width of this GraphObject in local coordinates. This just gets or sets the width component of the DesiredSize.

Declaration

public double Width { get; set; }

Property Value

Type	Description
double

Remarks

Default is double.NaN.

Size can also be constrained by setting MinSize and MaxSize.

The width does not include any transformation due to Scale or Angle, nor any pen thickness due to StrokeWidth if this is a Shape. If there is a containing Panel the Panel will determine the actual size.

Methods

Apply(Action<GraphObject>)

This method takes a function that can be used to apply multiple settings, bindings, or Add(params GraphObject[]) calls, to different GraphObjects. This is common in initialization.

Declaration

public GraphObject Apply(Action<GraphObject> func)

Parameters

Type	Name	Description
Action<GraphObject>	func	the function to apply to this GraphObject

Returns

Type	Description
GraphObject	this GraphObject

Remarks

If you are just adding settings, bindings, or GraphObjects to a single GraphObject, you do not need to use this, you can just chain calls to Set(object), Bind(params Binding[]), and Add(params GraphObject[]) instead. This method is mostly useful when setting the same values across multiple GraphObjects.

// define some common property settings
void nodeStyle(Node node) {
  node
    .Bind("Location", "Loc", Point.Parse, Point.Stringify))
    .Set(new { SelectionAdorned = false, Resizable = true });
}

var template1 =
  new Node() { ... }
    .Apply(nodeStyle);

var template2 =
  new Node() { ... }
    .Apply(nodeStyle);

Bind(params Binding[])

Add a number of data-bindings to this GraphObject.

Declaration

public GraphObject Bind(params Binding[] bindings)

Parameters

Type	Name	Description
Binding[]	bindings	the Bindings

Returns

Type	Description
GraphObject	this GraphObject

Remarks

Do not add, modify, or remove object Bindings after this object has been copied.

Read more about Bindings at the Introduction page about Data Bindings.

Bind(IEnumerable<Binding>)

Add a number of data-bindings to this GraphObject.

Declaration

public GraphObject Bind(IEnumerable<Binding> bindings)

Parameters

Type	Name	Description
IEnumerable<Binding>	bindings	a collection of Bindings

Returns

Type	Description
GraphObject	this GraphObject

Remarks

Do not add, modify, or remove object Bindings after this object has been copied.

Read more about Bindings at the Introduction page about Data Bindings.

Bind(string, SimpleConversion, BackConversion)

Add a data-binding to this GraphObject for the given property name and optional conversion functions.

Declaration

public GraphObject Bind(string prop, SimpleConversion conv, BackConversion backconv = null)

Parameters

Type	Name	Description
string	prop	A string naming the source and target property on the target object. This should not be the empty-string.
SimpleConversion	conv	An optional side-effect-free function converting the data property value to the value to set the target property. If the function is null or not supplied, no conversion takes place.
BackConversion	backconv	An optional conversion function to convert property values back to data values. Specifying this modifies the binding to set its Mode to be TwoWay.

Returns

Type	Description
GraphObject	this GraphObject

Remarks

Do not add, modify, or remove object Bindings after this object has been copied.

Read more about Bindings at the Introduction page about Data Bindings.

If you need to call OfElement(string) or OfModel(), you will have to pass a new Binding() to Northwoods.Go.GraphObject.Bind<T>(params Northwoods.Go.Models.Binding[]).

Bind(string, SimpleConversion, SimpleConversion)

Add a data-binding to this GraphObject for the given property name and optional conversion functions.

Declaration

public GraphObject Bind(string prop, SimpleConversion conv, SimpleConversion backconv)

Parameters

Type	Name	Description
string	prop	A string naming the source and target property on the target object. This should not be the empty-string.
SimpleConversion	conv	An optional side-effect-free function converting the data property value to the value to set the target property. If the function is null or not supplied, no conversion takes place.
SimpleConversion	backconv	An optional conversion function to convert property values back to data values. Specifying this modifies the binding to set its Mode to be TwoWay.

Returns

Type	Description
GraphObject	this GraphObject

Remarks

Do not add, modify, or remove object Bindings after this object has been copied.

Read more about Bindings at the Introduction page about Data Bindings.

If you need to call OfElement(string) or OfModel(), you will have to pass a new Binding() to Northwoods.Go.GraphObject.Bind<T>(params Northwoods.Go.Models.Binding[]).

Bind(string, TargetConversion, BackConversion)

Add a data-binding to this GraphObject for the given property name and optional conversion functions.

Declaration

public GraphObject Bind(string prop, TargetConversion conv = null, BackConversion backconv = null)

Parameters

Type	Name	Description
string	prop	A string naming the source and target property on the target object. This should not be the empty-string.
TargetConversion	conv	An optional side-effect-free function converting the data property value to the value to set the target property. If the function is null or not supplied, no conversion takes place.
BackConversion	backconv	An optional conversion function to convert property values back to data values. Specifying this modifies the binding to set its Mode to be TwoWay.

Returns

Type	Description
GraphObject	this GraphObject

Remarks

Do not add, modify, or remove object Bindings after this object has been copied.

Read more about Bindings at the Introduction page about Data Bindings.

If you need to call OfElement(string) or OfModel(), you will have to pass a new Binding() to Northwoods.Go.GraphObject.Bind<T>(params Northwoods.Go.Models.Binding[]).

Bind(string, TargetConversion, SimpleConversion)

Add a data-binding to this GraphObject for the given property name and optional conversion functions.

Declaration

public GraphObject Bind(string prop, TargetConversion conv, SimpleConversion backconv)

Parameters

Type	Name	Description
string	prop	A string naming the source and target property on the target object. This should not be the empty-string.
TargetConversion	conv	An optional side-effect-free function converting the data property value to the value to set the target property. If the function is null or not supplied, no conversion takes place.
SimpleConversion	backconv	An optional conversion function to convert property values back to data values. Specifying this modifies the binding to set its Mode to be TwoWay.

Returns

Type	Description
GraphObject	this GraphObject

Remarks

Do not add, modify, or remove object Bindings after this object has been copied.

Read more about Bindings at the Introduction page about Data Bindings.

If you need to call OfElement(string) or OfModel(), you will have to pass a new Binding() to Northwoods.Go.GraphObject.Bind<T>(params Northwoods.Go.Models.Binding[]).

Bind(string, string, SimpleConversion, BackConversion)

Add a data-binding to this GraphObject for the given property names and conversion functions.

Declaration

public GraphObject Bind(string targetprop, string sourceprop, SimpleConversion conv, BackConversion backconv = null)

Parameters

Type	Name	Description
string	targetprop	A string naming the target property on the target object. This should not be the empty-string.
string	sourceprop	A string name the source property on the bound data object If this is the empty string, the whole Data object is used.
SimpleConversion	conv	An optional side-effect-free function converting the data property value to the value to set the target property. If the function is null or not supplied, no conversion takes place.
BackConversion	backconv	An optional conversion function to convert property values back to data values. Specifying this modifies the binding to set its Mode to be TwoWay.

Returns

Type	Description
GraphObject	this GraphObject

Remarks

Do not add, modify, or remove object Bindings after this object has been copied.

Read more about Bindings at the Introduction page about Data Bindings.

If you need to call OfElement(string) or OfModel(), you will have to pass a new Binding() to Northwoods.Go.GraphObject.Bind<T>(params Northwoods.Go.Models.Binding[]).

Bind(string, string, SimpleConversion, SimpleConversion)

Add a data-binding to this GraphObject for the given property names and conversion functions.

Declaration

public GraphObject Bind(string targetprop, string sourceprop, SimpleConversion conv, SimpleConversion backconv)

Parameters

Type	Name	Description
string	targetprop	A string naming the target property on the target object. This should not be the empty-string.
string	sourceprop	A string name the source property on the bound data object If this is the empty string, the whole Data object is used.
SimpleConversion	conv	An optional side-effect-free function converting the data property value to the value to set the target property. If the function is null or not supplied, no conversion takes place.
SimpleConversion	backconv	An optional conversion function to convert property values back to data values. Specifying this modifies the binding to set its Mode to be TwoWay.

Returns

Type	Description
GraphObject	this GraphObject

Remarks

Do not add, modify, or remove object Bindings after this object has been copied.

Read more about Bindings at the Introduction page about Data Bindings.

If you need to call OfElement(string) or OfModel(), you will have to pass a new Binding() to Northwoods.Go.GraphObject.Bind<T>(params Northwoods.Go.Models.Binding[]).

Bind(string, string, TargetConversion, BackConversion)

Add a data-binding to this GraphObject for the given property names and conversion functions.

Declaration

public GraphObject Bind(string targetprop, string sourceprop, TargetConversion conv = null, BackConversion backconv = null)

Parameters

Type	Name	Description
string	targetprop	A string naming the target property on the target object. This should not be the empty-string.
string	sourceprop	A string name the source property on the bound data object If this is the empty string, the whole Data object is used.
TargetConversion	conv	An optional side-effect-free function converting the data property value to the value to set the target property. If the function is null or not supplied, no conversion takes place.
BackConversion	backconv	An optional conversion function to convert property values back to data values. Specifying this modifies the binding to set its Mode to be TwoWay.

Returns

Type	Description
GraphObject	this GraphObject

Remarks

Do not add, modify, or remove object Bindings after this object has been copied.

Read more about Bindings at the Introduction page about Data Bindings.

If you need to call OfElement(string) or OfModel(), you will have to pass a new Binding() to Northwoods.Go.GraphObject.Bind<T>(params Northwoods.Go.Models.Binding[]).

Bind(string, string, TargetConversion, SimpleConversion)

Add a data-binding to this GraphObject for the given property names and conversion functions.

Declaration

public GraphObject Bind(string targetprop, string sourceprop, TargetConversion conv, SimpleConversion backconv)

Parameters

Type	Name	Description
string	targetprop	A string naming the target property on the target object. This should not be the empty-string.
string	sourceprop	A string name the source property on the bound data object If this is the empty string, the whole Data object is used.
TargetConversion	conv	An optional side-effect-free function converting the data property value to the value to set the target property. If the function is null or not supplied, no conversion takes place.
SimpleConversion	backconv	An optional conversion function to convert property values back to data values. Specifying this modifies the binding to set its Mode to be TwoWay.

Returns

Type	Description
GraphObject	this GraphObject

Remarks

Do not add, modify, or remove object Bindings after this object has been copied.

Read more about Bindings at the Introduction page about Data Bindings.

If you need to call OfElement(string) or OfModel(), you will have to pass a new Binding() to Northwoods.Go.GraphObject.Bind<T>(params Northwoods.Go.Models.Binding[]).

CloneProtected(GraphObject)

Copies properties from this object to the given object, which must be of the same class. This is called by Copy(). This method may be overridden.

Declaration

protected virtual void CloneProtected(GraphObject copy)

Parameters

Type	Name	Description
GraphObject	copy

Remarks

For every property that you add to a subclass of a GraphObject-inheriting class, in this method you should consider assigning its value to the copied object. By default, the base method will call MemberwiseClone(), so reference properties will be shallow copies by default.

For example, let us define a custom Link class and add two properties:

public class CustomLink : Link {
  public int SomeNewProperty { get; set; } = 17;
  public List<double> SomeNewProperty2 { get; set; } = new List<double>();

  protected override void CloneProtected(GraphObject c) {
    // always call the base method in an override
    base.CloneProtected(c);
    var copy = (CustomLink)c;
    // assign the reference property of the new copy:
    copy.SomeNewProperty2 = new List<double>(SomeNewProperty2);  // make a copy of the list
  }
}

This ensures that copies of GraphObjects and their subclasses are faithful reproductions. Consider for properties that are references to objects whether the reference should be shared (the default via MemberwiseClone) or whether that object value should be copied as well, resulting in a less shallow copy. This is demonstrated above by making a copy of the property value that is a List, so that modifications to the list will not be shared by copies of the CustomLink. Further copies of the list items might be warranted, depending on their purpose.

Please read the Introduction page on Extensions for how to override methods and how to call this base method.

Copy()

Creates a deep copy of this GraphObject and returns it.

Declaration

public virtual GraphObject Copy()

Returns

Type	Description
GraphObject

Remarks

This method is the same as a clone for simple GraphObjects such as Shape, TextBlock, and Picture. For Panel this method copies the visual tree of GraphObjects that it contains.

FindBindingPanel()

Walks up the visual tree and returns the first Panel whose Data is bound to data. This can be useful when you need to inspect Data objects.

Declaration

public Panel FindBindingPanel()

Returns

Type	Description
Panel

GetDocumentAngle()

Returns the effective angle that the object is drawn at, in document coordinates, normalized to between 0 and 360.

Declaration

public double GetDocumentAngle()

Returns

Type	Description
double

Remarks

Basically this adds together all of the rotation declared by this Angle and the angles of all of its containing Panels, including the Part.

GetDocumentBounds()

Returns the Rect in document coordinates for this object's bounds.

Declaration

public virtual Rect GetDocumentBounds()

Returns

Type	Description
Rect	in document coordinates.

Remarks

If this GraphObject is a Part, the rect will be identical to its ActualBounds.

GetDocumentPoint(Point)

Returns the Point in document coordinates for a given Point in local coordinates.

Declaration

public Point GetDocumentPoint(Point local)

Parameters

Type	Name	Description
Point	local	a real Point in local coordinates.

Returns

Type	Description
Point	in document coordinates.

GetDocumentPoint(Spot)

Returns the Point in document coordinates for a given Spot in this object's bounds.

Declaration

public virtual Point GetDocumentPoint(Spot local)

Parameters

Type	Name	Description
Spot	local	a real Spot describing a relative location in or near this GraphObject.

Returns

Type	Description
Point	in document coordinates.

Remarks

For example, for an instance of a Node like this:

myDiagram.NodeTemplate =
  new Node(PanelLayoutAuto.Instance)
    .Add(
      new Shape("RoundedRectangle")
        .Bind("Fill", "Color),
      new TextBlock { Name = "TB", Margin = 3 }
        .Bind("Text", "Key")
    );

where the Node is positioned at 100, 200,

node.FindElement("TB").GetDocumentPoint(Spot.Center);

could return a Point that is approximately at 122, 213.

GetDocumentScale()

Returns the total scale that the object is drawn at, in document coordinates.

Declaration

public double GetDocumentScale()

Returns

Type	Description
double

Remarks

Basically this multiplies together this Scale with the scales of all of its containing Panels, including the Part.

GetLocalPoint(Point)

Given a Point in document coordinates, returns a new Point in local coordinates.

Declaration

public Point GetLocalPoint(Point p)

Parameters

Type	Name	Description
Point	p	a real Point in document coordinates.

Returns

Type	Description
Point	The corresponding Point in local coordinates.

Remarks

For example, if you have a mouse event whose DocumentPoint is at 122, 213, and if you have a Node whose Position is at 100, 200, node.GetLocalPoint(e.DocumentPoint) could return a Point that is at 22, 13. For a GraphObject within the Node named "TB",

node.FindElement("TB").GetLocalPoint(e.DocumentPoint)

could return a Point that is at 15.7, 6.7, if that "TB" object is positioned somewhat inside the bounds of the Node.

IsContainedBy(GraphObject)

This predicate is true if this object is an element, perhaps indirectly, of the given panel.

Declaration

public bool IsContainedBy(GraphObject panel)

Parameters

Type	Name	Description
GraphObject	panel

Returns

Type	Description
bool	true if this object is contained by the given panel, or if it is contained by another panel that is contained by the given panel, to any depth; false if the argument is null or is not a Panel.

Remarks

For example, if this GraphObject is inside a Part but is not itself the Part, obj.IsContainedBy(obj.Part) should be true.

IsEnabledElement()

This predicate is false if this object is inside any Panel that is not IsEnabled, or if this is itself a disabled panel.

Declaration

public bool IsEnabledElement()

Returns

Type	Description
bool

Remarks

This ignores the Visible and Pickable properties.

IsVisibleElement()

This predicate is true if this object is Visible and each of its visual containing panels is also visible.

Declaration

public bool IsVisibleElement()

Returns

Type	Description
bool

Remarks

This ignores the actual location or appearance (except visibility) of the panel that this object is part of, as well as ignoring all properties of the Layer or Diagram.

For Parts, you can call the IsVisible() predicate to determine if not only the Part is visible but also any containing Group or Link or Layer.

Set(GraphObject)

Set properties of this GraphObject to the values of a "partial" GraphObject.

Declaration

public GraphObject Set(GraphObject obj)

Parameters

Type	Name	Description
GraphObject	obj	the partial GraphObject to use for setting properties

Returns

Type	Description
GraphObject	this GraphObject

Remarks

Only properties that are different from the default for the GraphObject will be set in this manner.

For example, the following will only set the Angle and Opacity properties:

myObject.Set(new GraphObject {
  Angle = 90,
  Opacity = 0.5,
  Scale = 1  // won't be set, even if this GraphObject's scale isn't 1
})

You should only call this with a GraphObject subclass as an argument.

Calling this method is much less efficient than setting properties directly. It's acceptable to call when constructing templates, as that will only happen once.

Set(object)

Set properties of this GraphObject to the values of a given anonymous object.

Declaration

public GraphObject Set(object props)

Parameters

Type	Name	Description
object	props	the dynamic object of properties

Returns

Type	Description
GraphObject	this GraphObject

Remarks

If this is a Panel, you can set properties on named elements within the panel by using a Name_Property syntax for the property name. For example, if a Node has a Picture that is named "ICON" (because its Name property has been set to "ICON") and a TextBlock whose name is "TB", one could set properties on the Node and on each of those named elements by:

aNode.Set(new {
  Background = "red",
  ICON_Source = "https://www.Example.Com/images/alert.Jpg",
  TB_Font = "bold 12pt sans-serif"
});

At the current time only a single underscore is permitted in the property "name". Note that the use of all-upper-case object names is simply a convention.

Calling this method is much less efficient than setting properties directly. It's acceptable to call when constructing templates, as that will only happen once.

Set(string, object)

Set a property of this GraphObject to a value.

Declaration

public GraphObject Set(string propertyname, object value)

Parameters

Type	Name	Description
string	propertyname	the name of the property to set
object	value	the value to set the property to

Returns

Type	Description
GraphObject	this GraphObject

Remarks

If this is a Panel, you can set properties on named elements within the panel by using a Name_Property syntax for the property name. For example, if a Node has a TextBlock whose name is "TB", one could set properties on the Node and on that named element by:

aNode.Set("Background", "red");
aNode.Set("TB_Font", "bold 12pt sans-serif");

At the current time only a single underscore is permitted in the property "name". Note that the use of all-upper-case object names is simply a convention.

Calling this method is much less efficient than setting properties directly. It's acceptable to call when constructing templates, as that will only happen once.

Trigger(params AnimationTrigger[])

Add a number of AnimationTriggers to this GraphObject.

Declaration

public GraphObject Trigger(params AnimationTrigger[] triggers)

Parameters

Type	Name	Description
AnimationTrigger[]	triggers	the AnimationTriggers

Returns

Type	Description
GraphObject	this GraphObject

Trigger(IEnumerable<AnimationTrigger>)

Add a number of AnimationTriggers to this GraphObject.

Declaration

public GraphObject Trigger(IEnumerable<AnimationTrigger> triggers)

Parameters

Type	Name	Description
IEnumerable<AnimationTrigger>	triggers	a collection of AnimationTriggers

Returns

Type	Description
GraphObject	this GraphObject

Trigger(string, (int? Duration, Action<Animation> Finished, EasingFunction Easing)?, StartCondition?)

Add an AnimationTrigger to this GraphObject.

Declaration

public GraphObject Trigger(string propertyName, (int? Duration, Action<Animation> Finished, EasingFunction Easing)? animationSettings = null, StartCondition? startCondition = null)

Parameters

Type	Name	Description
string	propertyName	A string naming the target property to animate. This should not be the empty string.
(int? Duration, Action<Animation> Finished, EasingFunction Easing)?	animationSettings	An optional tuple describing properties to set on animations created by this AnimationTrigger. See the AnimationSettings property for detail. If specified, this also sets the StartCondition to Immediate.
StartCondition?	startCondition	An optional StartCondition to set the StartCondition property.

Returns

Type	Description
GraphObject

Implements

IHasContextMenu

IHasToolTip

Class GraphObject

Inheritance

Implements

Namespace: Northwoods.Go

Assembly: Northwoods.GoDiagram.WinForms.dll

Syntax

Remarks

GraphObject Sizing

GraphObject Size and Position within Panel

Top-level GraphObjects are Parts

User Interaction

GraphObjects as Ports

GraphObjects as labels on a Link

Interactive Behavior

Constructors

GraphObject()

Declaration

Properties

ActionCancel

Declaration

Property Value

Remarks

See Also

ActionDown

Declaration

Property Value

Remarks

See Also

ActionMove

Declaration

Property Value

Remarks

See Also

ActionUp

Declaration

Property Value

Remarks

See Also

ActualBounds

Declaration

Property Value

Remarks

See Also

Alignment

Declaration

Property Value

Remarks

See Also

AlignmentFocus

Declaration

Property Value

Remarks

See Also

Angle

Declaration

Property Value

Remarks

See Also

Background

Declaration

Property Value

Remarks

See Also

Click

Declaration

Property Value

Remarks

See Also

Column

Declaration

Property Value

Remarks

ColumnSpan

Declaration

Property Value

Remarks

ContextClick

Declaration

Property Value

Remarks