Scrolling ProgressBars

[kenodegard]

Is it possible to make the progress bars into a scrollable container?

While I could (and should) remove progress bars as they complete that doesn't address the issue of say having a window that is N lines long but having N+M bars and hence all of the M bars at the bottom of the container becoming inaccessible.

I have looked over the implementation of progress bars and read the documentation and I do not see a quick fix given that Containers themselves are not scrollable.

Any ideas?

[jonathanslenders]

Hi @njalerikson,

Containers are indeed not scrollable. Technically, we can make a ScrollableContainer, although I'm not sure how that would impact the rendering performance. We would have to paint the content of the ScrollableContainer to a much larger virtual screen, and then copy over the visible region.

I think however it should be possible to use the Window that wraps the _ProgressControl and take advantage of its scrolling capabilities. Window has a vertical_scroll attribute. One thing we have to keep in mind though is that a Window will try to keep the cursor position visible, but _ProgressControl does not report a cursor position, which means that it'll always be (0,0). Because of this Window will always adapt its vertical_scroll during the rendering to make the cursor visible. So, there we have two options. Either we give Window an option to ignore the cursor position, or we adapt _ProgressControl so that it does report a cursor position, and we use that for scrolling. I think the first will give the best user experience.

I take this as a feature request. Feel free to play around with the code and create a PR. When I have some time, I'll look into this.