Missing set_window_title()

[StefanSalewski]

I started playing with egui some days ago, based on the example https://github.com/emilk/egui/tree/master/examples/hello_world

That example sets a static window title. But I would like to have a dynamic one as in GTK, so that I can use the title to display messages, as the last move in a chess game. I have spent a few hours for searching, and some results mentioned a function set_window_title(), while https://www.reddit.com/r/rust/comments/1ccfpug/comment/l15zl8p/ tells us

3. The API for setting the window frame title changed

So I would assume that such a functionality is available, but I am unable to find something.

[YgorSouza]

The API changed because now egui can handle multiple native windows, which are referred to as "viewports", because egui is used for things other than desktop applications, where the notion of native window doesn't necessarily exist. This was introduced in #3172.

If you put this in the hello_world example:

      if ui
          .text_edit_singleline(&mut self.name)
          .labelled_by(name_label.id)
          .changed()
      {
          ui.ctx()
              .send_viewport_cmd(egui::ViewportCommand::Title(self.name.clone()));
      }

It will change the window title to whatever you write in the text field. See ViewportCommand for more.

[StefanSalewski]

Thank you very much for this fast and helpful reply.