egui/tests
Emil Ernerfeldt a768d74411
Add `Ui::is_sizing_pass` for better size estimation of `Area`s, and menus in particular (#4557)
* Part of https://github.com/emilk/egui/issues/4535
* Closes https://github.com/emilk/egui/issues/3974

This adds a special `sizing_pass` mode to `Ui`, in which we have no
centered or justified layouts, and everything is hidden. This is used by
`Area` to use the first frame to measure the size of its contents so
that it can then set the perfectly correct size the subsequent frames.

For menus, where buttons are justified (span the full width), this
finally the problem of auto-sizing. Before you would have to pick a
width manually, and all buttons would expand to that width. If it was
too wide, it looked weird. If it was too narrow, text would wrap. Now
all menus are exactly the width they need to be. By default menus will
wrap at `Spacing::menu_width`.

This affects all situations when you have something that should be as
small as possible, but still span the full width/height of the parent.
For instance: the `egui::Separator` widget now checks the
`ui.is_sizing_pass` flag before deciding on a size. In the sizing pass a
horizontal separator is always 0 wide, and only in subsequent passes
will it span the full width.
2024-05-29 10:27:04 +02:00
..
test_inline_glow_paint Support returning errors when creating the app (#4565) 2024-05-28 21:59:19 +02:00
test_size_pass Add `Ui::is_sizing_pass` for better size estimation of `Area`s, and menus in particular (#4557) 2024-05-29 10:27:04 +02:00
test_viewports Support returning errors when creating the app (#4565) 2024-05-28 21:59:19 +02:00
README.md Move test crates to own folder (#4554) 2024-05-27 21:28:33 +02:00

README.md

Test apps

Some application to tests various parts of egui and eframe.

At some point it would be nice to have automatic screenshot regression tests for these.