Strange scrolling behavior #1784
John-Nagle
started this conversation in
General
Replies: 0 comments
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
-
I'm getting some strange scrolling behavior. Code is in Github here. You can build it and run it. This is a mockup of a user interface I'm using to make sure that Egui, Rend3, Winit, and WGPU all play well together cross-platform before I hook in the heavy machinery of the metaverse client.
So the first screen is a big scroll area of big buttons, one for each metaverse grid.
![gridselector01](https://user-images.githubusercontent.com/942608/176823093-8eade53f-a5cc-49e6-97cc-eabe4ad8bd5f.png)
The code for this follows the instructions here.
It looks fine, but not all the menu items fit, so scrolling is needed. The trouble is, if I scroll down far enough to fully expose the bottom menu item, the display starts flickering, alternating between two scroll states.
So I put a println! in the draw function to see what the row range was doing.
println!("Rows: {:?} of {}, row height {}", row_range, self.grids.len(), row_height); // ***TEMP***
Output is:
Uh oh. So successive calls alternate between starting with row 0 and row 2, and the display looks like what you'd expect with that happening. I'm not doing anything different between calls; it's just a refresh loop.
Also, I noticed that if I have a large number of rows, the row range start may change, but the row range end is always the last item, so it's drawing too much.
Am I doing something wrong, or what?
(Egui 0.17.0, for compatibility with Rend3)
Beta Was this translation helpful? Give feedback.
All reactions