topic Activate current viewport in a layout tab in .NET Forum

Activate current viewport in a layout tab

MrBeann — Fri, 03 Mar 2023 10:38:32 GMT

I have 2 viewports (VP1 and VP2) in a layout tab (Layout 1). I want to select viewport VP2 and activate this viewport to work with it. I can select VP2 but if I use SwitchToModelSpace() or "MSPACE" command, it only works with VP1.

Please help me. Thanks!

Re: Activate current viewport in a layout tab

_gile — Fri, 03 Mar 2023 12:35:11 GMT

Hi,

You can set the CVPORT system variable with the value of the Viewport.Number property.

Re: Activate current viewport in a layout tab

MrBeann — Fri, 03 Mar 2023 13:13:12 GMT

<CommandMethod("VPSELECT", CommandFlags.Redraw Or CommandFlags.NoTileMode)> Public Shared Sub VPSelectCommand() Dim doc As Document = Application.DocumentManager.MdiActiveDocument Dim ed As Editor = doc.Editor Dim db As Database = doc.Database ed.SwitchToPaperSpace() Dim peo = New PromptEntityOptions(vbLf & "Select viewport: ") peo.SetRejectMessage(vbLf & "Requires a Viewport") peo.AddAllowedClass(GetType(Viewport), False) Dim result As PromptEntityResult = ed.GetEntity(peo) If result.Status <> PromptStatus.OK Then Return Using tr = New OpenCloseTransaction() Dim viewport As Viewport = CType(tr.GetObject(result.ObjectId, OpenMode.ForRead), Viewport) Application.SetSystemVariable("cvport", viewport.Number) ed.SwitchToModelSpace() End Using End Sub

I tried this code and get error "eInvalidInput" at "ed.SwitchToModelSpace()"

Re: Activate current viewport in a layout tab

MrBeann — Fri, 03 Mar 2023 13:23:26 GMT

<DllImport("accore.dll", CallingConvention:=CallingConvention.Cdecl, EntryPoint:="?acedSetCurrentVPort@@YA?AW4ErrorStatus@Acad@@PEBVAcDbViewport@@@Z")>'?acedSetCurrentVPort@@YA?AW4ErrorStatus@Acad@@PBVAcDbViewport@@@Z")> Public Shared Function acedSetCurrentVPort(ByVal AcDbVport As IntPtr) As IntPtr End Function acedSetCurrentVPort(viewport.UnmanagedObject)

I tried this code above too and put "viewport.On = True" also don't work.

Re: Activate current viewport in a layout tab

_gile — Fri, 03 Mar 2023 13:23:43 GMT

You have to SwitchToModelSpace before setting the CVPORT sysvar.

Re: Activate current viewport in a layout tab

MrBeann — Fri, 03 Mar 2023 13:28:06 GMT

This worked! Thank you!