Events Class

The Events class allows the user to register event listeners for drawing user interface events.

Inheritance Hierarchy

SystemObject
SystemMarshalByRefObject
Tekla.Structures.Drawing.UIEvents

Namespace: Tekla.Structures.Drawing.UI
Assembly: Tekla.Structures.Drawing (in Tekla.Structures.Drawing.dll) Version: 2023.0.3

Syntax

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[SerializableAttribute]
public sealed class Events : MarshalByRefObject

<SerializableAttribute>
Public NotInheritable Class Events
	Inherits MarshalByRefObject

The Events type exposes the following members.

Constructors

	Name	Description
	Events	Constructs a new instance of Events.

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Methods

	Name	Description
	InitializeLifetimeService	Initializes the lifetime service. (Overrides MarshalByRefObjectInitializeLifetimeService.)
	OnInterrupted	Called when uesr interrupts.
	Register	Registers the instance to listen to the specified events.
	UnRegister	Unregisters the instance from listening to events.

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Events

	Name	Description
	DocumentManagerClosed	The DocumentManagerClosed eventis raised when the document manager is closed.
	DrawingEditorClosed	The DrawingEditorClosed event is raised when the drawing editor is closed.
	DrawingEditorOpened	The DrawingEditorOpened event is raised when the drawing editor is opened.
	DrawingListSelectionChanged	The DrawingListSelectionChanged event is raised when selection on the drawing list has changed.
	DrawingLoaded	The DrawingLoaded event is raised when a new drawing is opened in the drawing editor.
	Interrupted	Occurs when user interrupts.
	SelectionChange	The SelectionChange event is raised when the selection is changed in a Tekla Structures drawing.

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Remarks

Asynchronous event handling

Registered event handlers are called asynchronously so that many handlers may be running simultaneously. Event handlers are not guaranteed to be run in the same thread where they were registered. The asynchronous nature of the events requires the use of synchronization constructs on objects and data structures that are not defined to be thread safe.

Microsoft's documentation about the lock statement: http://msdn.microsoft.com/en-us/library/c5kehkcz.aspx
Microsoft's documentation about delegates: http://msdn.microsoft.com/en-us/library/900fyy8e.aspx
Microsoft's documentation about managed threading: http://msdn.microsoft.com/en-us/library/1c9txz50.aspx

Examples

The following example shows how to make sure that only one selection event handler is running at a time.

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using Tekla.Structures.Drawing;
using Tekla.Structures.Drawing.UI;

public class Example
{
    private Tekla.Structures.Drawing.UI.Events _events = new Tekla.Structures.Drawing.UI.Events();
    private object _selectionEventHandlerLock = new object();

    public void RegisterEventHandler()
    {
        _events.SelectionChange += Events_SelectionChangeEvent;
        _events.Register();
    }

    public void UnRegisterEventHandler()
    {
        _events.UnRegister();
    }

    void Events_SelectionChangeEvent()
    {
        /* Make sure that the inner code block is running synchronously */
        lock(_selectionEventHandlerLock)
        {
            System.Console.WriteLine("Selection changed event received.");
        }
    }
}

Reference

Tekla.Structures.Drawing.UI Namespace