# How to detect a container resize event in GTK
**URL:** https://discourse.julialang.org/t/how-to-detect-a-container-resize-event-in-gtk/59624
**Category:** Visualization
**Tags:** gtk
**Created:** [April 19, 2021, 11:08pm UTC](https://discourse.julialang.org/t/how-to-detect-a-container-resize-event-in-gtk/59624 "2021-04-19T23:08:55Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@johntrinder](https://discourse.julialang.org/u/johntrinder)
#### Post date: [April 19, 2021, 11:08pm UTC](https://discourse.julialang.org/t/how-to-detect-a-container-resize-event-in-gtk/59624/1 "2021-04-19T23:08:55Z")
I’ve scoured google but came up with nothing.
I’ve done the following:
id = signal\_connect(alig, “check-resize”) do widget, event
println(“The window was resized”)
end
where ‘alig’ is a GtkAlignment to which I add a Canvas at run-time.
---
### Author:  [@johntrinder](https://discourse.julialang.org/u/johntrinder)
#### Post date: [April 20, 2021, 12:01am UTC](https://discourse.julialang.org/t/how-to-detect-a-container-resize-event-in-gtk/59624/2 "2021-04-20T00:01:27Z")
Can’t find “check-resize” anywhere in the docs. “size-allocate” is the event I’m after
---
### Author:  [@Lilith](https://discourse.julialang.org/u/Lilith)
#### Post date: [August 16, 2022, 12:51am UTC](https://discourse.julialang.org/t/how-to-detect-a-container-resize-event-in-gtk/59624/3 "2022-08-16T00:51:28Z")
If you want register a callback for the `size-allocate` event, then pass `"size-allocate"` as the third argument of `signal_connect`. This works for me:
```julia
signal_connect(window, "size-allocate") do widget, event
println("The window was resized")
end
```