Please note : This help page is not for the latest version of Enterprise Architect. The latest help can be found here.

Diagram Class

A Diagram corresponds to a single UML diagram. It is accessed through the Package Diagrams collection and in turn contains a collection of diagram objects and diagram connectors. Adding to the DiagramObject Class adds an existing element to the diagram. When adding a new diagram, you must set the diagram type to one of the valid types:

  • Activity
  • Analysis
  • Component
  • Custom
  • Deployment
  • Logical
  • Sequence
  • Statechart
  • Use Case

For a Collaboration (Communication) diagram, use the Analysis type.

Associated table in .EAP file

t_diagram

Diagram Attributes

Attribute

Remarks

See also

Author

String

Notes: Read/Write

The name of the author.

CreatedDate

Date

Notes: Read/Write

The date the diagram was created.

cx

Long

Notes: Read/Write

The X dimension of the diagram (the default is 800).

cy

Long

Notes: Read/Write

The Y dimension of the diagram (the default is 1100).

DiagramGUID

Variant

Notes: Read/Write

A globally unique ID for this diagram.

DiagramID

Long

Notes: Read only

A local ID for the diagram.

DiagramLinks

Collection

Notes: Read only

A list of DiagramLink objects, each containing information about the display characteristics of a connector in a diagram.

 DiagramLink Class Collection Class

DiagramObjects

Collection

Notes: Read only

A collection of references to DiagramObjects. A DiagramObject is an instance of an element in a diagram, and includes size and display characteristics.

 DiagramObject Class Collection Class

ExtendedStyle

String

Notes: Read/Write

An extended style attribute.

HighlightImports

Boolean

Notes: Read/Write

A flag to indicate that elements from other Packages should be highlighted.  Corresponds with the 'Show Namespace' option in the diagram 'Properties' dialog.

 Configure Diagram Display

IsLocked

Boolean

Notes: Read/Write

A flag indicating whether this diagram is locked or not.

MetaType

String

Notes: Read only

The diagram's domain-specific meta type, as defined by an MDG Technology.

ModifiedDate

Variant

Notes: Read/Write

The date the diagram was last modified.

Name

String

Notes: Read/Write

The diagram name.

Notes

String

Notes: Read/Write

Set or retrieve notes for this diagram.

ObjectType

ObjectType

Notes: Read only

Distinguishes objects referenced through a Dispatch interface.

 ObjectType

Orientation

String

Notes: Read/Write

The page orientation: P for Portrait or L for Landscape.

PackageID

Long

Notes: Read/Write

The ID of the Package that this diagram belongs to.

PageHeight

Long

Notes: Read

The number of pages high the diagram is.

PageWidth

Long

Notes: Read

The number of pages wide the diagram is.

ParentID

Long

Notes: Read/Write

The optional ID of an element that 'owns' this diagram; for example, a Sequence diagram owned by a Use Case.

Scale

Long

Notes: Read/Write

The zoom scale (the default is 100).

SelectedConnector

Connector

Notes: Read/Write

The currently selected connector on this diagram. Null if there is no currently selected diagram.

 Connector Class

SelectedObjects

Collection

Notes: Read only

Gets a collection representing the currently selected elements on the diagram.

You can remove objects from this collection to deselect them, and add elements to the collection by passing the Object ID as a name to select them.

 Collection Class

ShowDetails

Long

Notes: Read/Write

A flag to indicate that the Diagram Details text should be shown: 1 = Show, 0 = Hide.

ShowPackageContents

Boolean

Notes: Read/Write

A flag to indicate that the Package contents should be shown in the current diagram.

ShowPrivate

Boolean

Notes: Read/Write

A flag to show or hide Private features.

ShowProtected

Boolean

Notes: Read/Write

A flag to show or hide Protected features.

ShowPublic

Boolean

Notes: Read/Write

A flag to show or hide Public features.

Stereotype

String

Notes: Read/Write

Sets or gets the stereotype for this diagram.

StyleEx

String

Notes: Read/Write

Advanced style settings, reserved for the use of Sparx Systems.

Swimlanes

String

Notes: Read/Write

Information on swimlanes contained in the diagram.

Please note that this property is superseded by SwimlaneDef.

 SwimlaneDef Class

SwimlaneDef

SwimlaneDef

Notes: Read/Write

Information on swimlanes contained in the diagram.

 SwimlaneDef Class

Type

String

Notes: Read only

The diagram type; see the t_diagramtypes table in the .eap file for more information.

Version

String

Notes: Read/Write

The version of the diagram.

Diagram Methods

Method

Details

See also

ApplyGroupLock (string aGroupName)

Boolean

Notes: Applies a group lock to this diagram object, for the specified group, on behalf of the current user.

Returns True if the operation is successful; returns False if the operation is unsuccessful. Use GetLastError() to retrieve error information.

Parameter:

  • aGroupName: String - the name of the user group for which to set the group lock

ApplyUserLock ()

Boolean

Notes: Applies a user lock to this diagram object, for the current user.

Returns True if the operation is successful; returns False if the operation is unsuccessful. Use GetLastError() to retrieve error information.

GetDiagramObjectByID (long ID, string DUID)

DiagramObject

Notes: Returns the DiagramObject object, if it exists on the diagram.

Parameters:

  • ID: Long - the ElementID of the diagram object
  • DUID: String - the optional Diagram Unique ID of the diagram object

 DiagramObject Class

GetLastError ()

String

Notes: Returns a string value describing the most recent error that occurred in relation to this object.

ReadStyle (string StyleName)

String

Notes: Returns the current value of the named diagram style.

Use GetLastError() to retrieve error information.

Parameters:

  • StyleName: String - the name of the diagram style whose value is to be retrieved; valid StyleNames are:
         -  Show Element Property String
         -  Show Connector Property String
         -  Show Feature Property String

ReleaseUserLock ()

Boolean

Notes: Releases a group lock or user lock on this diagram object.

Returns True if the operation is successful; returns False if the operation is unsuccessful. Use GetLastError() to retrieve error information.

ReorderMessages ()

Void

Notes: Resets the display order of Sequence and Collaboration messages.

This is typically used after inserting or deleting messages in the diagram.

SaveAsPDF (string FileName)

Boolean

Notes: Export the diagram to a PDF document. Returns True on success.

Parameters:

  • FileName: String - full path to file location

SaveImagePage(long x, long y, long sizeX, long sizeY, string filename, long flags)

Boolean

Notes: Saves a page of the diagram to disk.

Returns True if the operation is successful; returns False if the operation is unsuccessful.

Use GetLastError() to retrieve error information.

Parameters:

  • x: Long - the horizontal page
  • y: Long - the vertical page
  • sizeX: Long - currently unused; pass a value of 0 to ensure behavior does not change in a future build
  • sizeY: Long - currently unused; pass a value of 0 to ensure behavior does not change in a future build
  • filename: String - the filename and path to save the image
  • flags: Long - additional options, currently unused; pass a value of 0 to ensure behavior does not change in a future build

The image type is determined by the extension of the filename. Currently only .emf, .bmp and .png formats are supported.

ShowAsElementList (bool ShowAsList, bool Persist)

Boolean

Notes: Toggles the diagram display between diagram format and Diagram List depending on the value of ShowAsList.

If Persist is set, the display format is written to the database so the diagram always opens in that format (diagram or list). Otherwise, the display format falls back to the default (diagram) once the display is closed.

Parameters:

  • ShowAsList: Boolean - indicates diagram or Diagram List
  • Persist: Boolean - indicates set (maintain ShowAsList value) or not (revert to default)

 Diagram List

Update ()

Boolean

Notes: Updates this diagram object after modification or appending a new item.

If False is returned, use GetLastError() to retrieve error information.

VirtualizeConnector (int ConnectorID, int Action, int X, int Y)

Boolean

Notes: Creates a virtual copy of the source or target element on a connector, and sets its location on the diagram as a waypoint on the connector. If the source element is being virtualized, the waypoint is created as the first on the connector, and if the target element is being virtualized, the waypoint is created as the last on the connector.

If called again on the same connector, removes the virtual element. However, the waypoint remains in place.

As waypoints and therefore virtual elements can only be created on connectors with the Custom line style, if the connector does not have this line style the method sets it. So, after this method executes, an Update function should be called for the connector as well as for the diagram. All parameters are required for the function to complete successfully.

Returns True if the operation is successful; returns False if the operation is unsuccessful.

Parameters:

  • ConnectorID - Integer: the ID of the connector on which to create the virtual element
  • Action - Integer: the element to be virtualized; 1 for the source element, 2 for the target element
  • X - Integer: the position on the X axis that the element's center point will be aligned with
  • Y - Integer - the position on the Y axis that the element's centre point will be aligned with

For example, to virtualize the source element of the selected connector:

function main()

{

     var diagram as EA.Diagram;

     var conn as EA.Connector;

     diagram = Repository.GetCurrentDiagram();

     if(diagram != null)

     {

          var connector as EA.Connector.

          connector = diagram.SelectedConnector;

          diagram.VirtualizeConnector(connector.ConnectorID, 1, 100, 150);

          connector.Update();

          diagram.Update();

          Repository.ReloadDiagram(diagram.DiagramID);

     }

     else

     {

          Session.Output("Script requires a diagram to be visible");

     }

}

main();

 Virtual Connector Ends

WriteStyle (string StyleName, string StyleValue)

Void

Notes: Sets the value of the named diagram style.

Use GetLastError() to retrieve error information.

Parameters:

  • StyleName: String - the name of the diagram style whose value is to be retrieved; valid StyleNames are:
         -  Show Element Property String
         -  Show Connector Property String
         -  Show Feature Property String
  • StyleValue: String - the value to be set in the named diagram style; valid values for the StyleNames listed above are 0 and 1