topic Re: Update Screen in .NET Forum

Update Screen

SRSDS — Thu, 26 Sep 2019 19:32:16 GMT

Some changes made in a palette do not get reflected on screen until the mouse moves to the drawing area.

When the mouse moves over the drawing area the updates are instantly reflected.

Application.UpdateScreen() doesn't work.

SendStringToExecute"REGEN " does, but with complicated drawings with xrefs it can take a long time to update.

The commands I need to execute are very often so I don't want the user to be sitting back for 10 seconds every time they execute a command.

Is there a solution or workaround for this?

Re: Update Screen

Virupaksha_aithal — Fri, 27 Sep 2019 06:17:25 GMT

Hi,

does blog https://adndevblog.typepad.com/autocad/2013/03/use-of-windowfocus-in-autocad-2014.html helps?

Re: Update Screen

SRSDS — Fri, 27 Sep 2019 07:48:42 GMT

Hi,

That's the exact problem and solution but I need some help converting it to vb.net

Below is the converted code using an online converter.

And below that my attempt at adjusting it.

"Dynamic" is an unknown syntax.

Desperately hoping you or someone else can help me on this.

Re: Update Screen

_gile — Fri, 27 Sep 2019 08:32:49 GMT

Hi,

Try replacing dynamic with Object.

Re: Update Screen

SRSDS — Fri, 27 Sep 2019 08:54:32 GMT

Sorry about this. Commenting out the converted portion left me with this

Re: Update Screen

_gile — Fri, 27 Sep 2019 09:16:49 GMT

If I remember well, there's an issue with the GetAcadDocument() extension method and VB.

You should try like this:

Dim doc As Document = Application.DocumentManager.MdiActiveDocument
Dim docObj As Object = DocumentExtension.GetAcadDocument(doc)
docObj.Window.Focus()

But it seems to me this can be done without using the COM object AcadDocument, you can access the Window directly from the .NET Document instance by simply doing:

Dim doc As Document = Application.DocumentManager.MdiActiveDocument
doc.Window.Focus()

Re: Update Screen

Alexander.Rivilis — Fri, 27 Sep 2019 09:25:56 GMT

Autodesk.AutoCAD.Internal.Utils.SetFocusToDwgView()

This static method can been helpful.

Re: Update Screen

_gile — Fri, 27 Sep 2019 09:50:04 GMT

Another way, recommended by Kean Walmsley* that I extensively use with Palettes is to wrap the method related to AutoCAD in a CommandMethod and just call them from the palette with SendStringToExecute. This way you let AutoCAD do all the locking / focus stuff.

* "Once again there’s our important rule of thumb when it comes to implementing a modeless UI: rather than manually locking the current document, it’s safer to define a command – which will implicitly lock the current document – and call that from the UI via SendStringToExecute()."

Re: Update Screen

SRSDS — Mon, 19 Jul 2021 16:01:28 GMT

I'm going to drop this here which I found on another thread..

Seems to solve the problem when Utils.SetFocusToDwgView doesn't want to work and you don't want to SendStringToExecute.

Private Declare Function SetFocus Lib "user32" (ByVal hwnd As System.IntPtr) As System.IntPtr

SetFocus(Application.DocumentManager.MdiActiveDocument.Window.Handle)