How to create a log output widget with auto scroll to bottom?

[AllenDang]

I need a widget to display runtime log which support auto scroll to bottom when new log string is added.

Ideally, TextEdit or ScrollView+Text might have some function like "Scroll To XY", I could invoke it to control the scroll position programable, but I didn't find any clue from document and examples.

Any hint?

[ogoffart]

That's a feature that make sense. I wonder what API it should have.

Right now, you will have to set the content-y manually to go to the end like so:

                log_view.viewport-y = min(0px, - log_view.viewport-height + log_view.visible-height);

Full example

[aurexav]

+1.

An issue to track this would be better.

[nic-obert]

Are there any plans for an out-of-the-box autoscroll feature? I currently have to manually implement a scroll-to-bottom function like @ogoffart suggested and manually invoke it from the backend code every time I want to add a new output line to a ListView.
It would be nice to leave UI functionality, like automatic scroll-to-bottom, out of the backend code.

[igiona]

You can kind-of do this fully on the UI side:

                    autoscroll_timer := Timer {
                        interval: 100ms;
                        running: autoscroll.checked;
                        triggered() => {
                            log_view.viewport-y = min(0px, - log_view.viewport-height + log_view.visible-height);
                        }
                    }

                    autoscroll := CheckBox {
                        text: "Autoscroll";
                        checked: true;
                    }

Of course it's a bit a waste of resources since the timer runs even if the list never changes ....
An out-of-the box solution would be much appreciated ;)