egui::Context::set_zoom_factor does not work

[dgulotta]

In Notan, calling egui::Context::set_zoom_factor does not change the size of the UI, only the sharpness of the UI elements. I checked that set_zoom_factor works correctly in eframe.

This is particularly unfortunate because egui's default font size on my system in either WebAssembly or Wine is about 5 points (with either notan or eframe).

[dgulotta]

A workaround is to use Context::style_mut to change all of the font sizes during initialization. One thing that was not obvious to me is that it's necessary to call Graphics::render on the egui output, even though there is nothing to render yet, or else the app crashes with the error "GL_INVALID_VALUE: Offset overflows texture dimensions."

[woelper]

I ran into this as well last week. This would be great for accessibility. I'll try your workaround @dgulotta , thank you for that! My use case would be to allow changing UI scale at runtime and not during initialization, I'll try if the workaround works in that case too.