WindowsForms and PickPoint

[apointeau]

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

[jeremy_tammik]

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....

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

[apointeau]

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...

[EATREVITPOOPCAD]

Is your form modeless? 

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

EDIT: Nevermind... looks like it is

[apointeau]

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 !

[jeremy_tammik]

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...

[apointeau]

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