untitled window - why?

[giraffedata]

What sort of things can stop a window from getting a title? (Or name; I’m not sure what to call it)?

I have a simple test program that, run in one environment, creates a window that gets a title equal to the program name and then it does a GTK gtk_window_set_title() and it changes. Run in another environment (and I can’t see any relevant difference between environments), it comes up “untitled” and gtk_window_set_title() doesn’t change that.

What can I look at to understand why the second case doesn’t work?

And what is the relationship of the WM_NAME property to all this? Does FVWM set it, use it, neither?

[thomasadam]

@giraffedata

What sort of things can stop a window from getting a title? (Or name; I’m not sure what to call it)?

A few things. It will depend how a window update its WM_NAME.

@giraffedata

I have a simple test program that, run in one environment, creates a window that gets a title equal to the program name and then it does a GTK gtk_window_set_title() and it changes. Run in another environment (and I can’t see any relevant difference between environments), it comes up “untitled” and gtk_window_set_title() doesn’t change that.

What can I look at to understand why the second case doesn’t work?

Use “xprop -spy”.

@giraffedata

And what is the relationship of the WM_NAME property to all this? Does FVWM set it, use it, neither?

FVWM will use it, yes. But FVWM cannot set it.

– Thomas Adam

[giraffedata]

@thomasadam

@giraffedata

And what is the relationship of the WM_NAME property to all this? Does FVWM set it, use it, neither?

FVWM will use it, yes. But FVWM cannot set it.

Thank you. And how does it use it? Is WM_NAME the source of the window title?

My untitled window has no WM_NAME property, so if that’s where FVWM gets the title, I guess I know what I have to look at next - I have to figure out why GTK is not setting it, right?

[thomasadam]

@giraffedata

@thomasadam

@giraffedata

And what is the relationship of the WM_NAME property to all this? Does FVWM set it, use it, neither?

FVWM will use it, yes. But FVWM cannot set it.

Thank you. And how does it use it? Is WM_NAME the source of the window title?

Yes.

@giraffedata

My untitled window has no WM_NAME property, so if that’s where FVWM gets the title, I guess I know what I have to look at next - I have to figure out why GTK is not setting it, right?

Correct.

– Thomas Adam