topic Re: WindowsForms and PickPoint in Revit API Forum

WindowsForms and PickPoint

apointeau — Mon, 28 Feb 2022 09:40:07 GMT

Hi everyone!

I'm trying to create windows form to place unplaced rooms by picking a point in the interface.

So, I have to create an interface with generated button (for each rooms) to which I apply a function called place_room().

I want the function to:

- hide the forms

- pick a point in UI

- place the room at the point

- unhide the forms

I have one big problem: it seems that when the form is hidden, it's always on focus so I can't pick a point...

I'm aware of the external event to place a room with the help of Jeremy: https://thebuildingcoder.typepad.com/blog/2015/12/external-event-and-10-year-forum-anniversary.html

I tried the solution of Jeremy here: https://thebuildingcoder.typepad.com/blog/2015/11/pickpoint-with-wpf-and-no-threads.html But it's not working too.

My code now:

private void place_room() { this.Hide(); var pt = uidoc.Selection.PickPoint("Merci de sélectionner un point"); //do stuff to place the room at the selected point this.Show(); }

With this code, the form hides itself but I can't pick a point...

Sorry if this problem was solved somewhere in the forum but I didn't find it...

Have a nice day

Re: WindowsForms and PickPoint

jeremy_tammik — Mon, 28 Feb 2022 12:38:40 GMT

There are various Windows API calls that you can use to set the focus back to the Revit graphics window. One example of using SetFocus is given here:

https://thebuildingcoder.typepad.com/blog/2016/03/implementing-the-trackchangescloud-external-event.html

There may be other tricks that you can apply as well. Nowadays, you can use the Revit main window property instead of ComponentManager.ApplicationWindow.

Re: WindowsForms and PickPoint

apointeau — Mon, 28 Feb 2022 14:57:49 GMT

Thanks for your answer!

I implemented the SetFocusToRevit() but my screen is always waiting for something and I can't select something.

But when I press the Esc I have the error message that I didn't select something...

Re: WindowsForms and PickPoint

EATREVITPOOPCAD — Mon, 28 Feb 2022 15:50:04 GMT

Is your form modeless?

https://thebuildingcoder.typepad.com/blog/2011/09/modeless-forms-in-revit.html

EDIT: Nevermind... looks like it is

Re: WindowsForms and PickPoint

apointeau — Thu, 07 Apr 2022 05:59:45 GMT

Hello @jeremy_tammik and @EATREVITPOOPCAD and thank you for your help!

I'm sorry I didn't come back but I found the solution!

I didn't remenber where exactly I found the solution but probably on this forum!

The solution :

The main class to call the forms

public class ManageUnplacedRooms : IExternalCommand { // do stuff ManageUnPlacedRoomsForms forms = new ManageUnPlacedRoomsForms(doc, uidoc); forms.Show(); return Result.Succeeded; }

public partial class ManageUnPlacedRoomsForms : System.Windows.Forms.Form { place_rooms myplace_rooms; ExternalEvent placeroomcommand; public ManageUnPlacedRoomsForms(Document document, UIDocument uidocument) { InitializeComponent(); myplace_rooms = new place_rooms(); placeroomcommand = ExternalEvent.Create(myplace_rooms); doc = document; uidoc = uidocument; } //do a lot a stuff //private void link to a button private void place_room(object sender, EventArgs e) { // external command? placeroomcommand.Raise(); } }

public class place_rooms : IExternalEventHandler { public void Execute(UIApplication a) { UIDocument uidoc = a.ActiveUIDocument; Document doc = uidoc.Document; // do stuff again //Start the transaction Transaction transaction = new Transaction(doc); transaction.Start("Placement temp pièce :" + nameelem); // ask user to pick point XYZ pt = uidoc.Selection.PickPoint("Position de la pièce"); // do stuff again transaction.Commit(); } // public string requiered for the IExternalEventHandler I think public string GetName() { return "Mise en place de pièce"; } }

I hope that help others !

Have a nice day !

Re: WindowsForms and PickPoint

jeremy_tammik — Thu, 07 Apr 2022 06:52:18 GMT

Brilliant! Congratulations on solving and thank you for a very nice sample!

By the way, have you looked at the Revit SDK sample ModelessDialog/ModelessForm_ExternalEvent?

I believe it has certain similarities. Maybe it even achieves the same thing in the same way...

Re: WindowsForms and PickPoint

apointeau — Thu, 07 Apr 2022 14:16:48 GMT

@jeremy_tammik Yes, exactly ! I remember looking at that ! Helps me a lot !