Adds `Marginf` to fill the previous niche.
This is all in a pursuit to shrink the sizes of often-used structs, to
improve performance (less cache misses, less memcpy:s, etc).
* On the path towards https://github.com/emilk/egui/issues/4019
* Part of https://github.com/emilk/egui/issues/4019
As part of the work on adding a custom `Border` to everything, I want to
make sure that the size of `RectShape`, `Frame` and the future `Border`
is kept small (for performance reasons).
This PR changes the storage of the corner radius of rectangles from four
`f32` (one for each corner) into four `u8`. This mean the corner radius
can only be an integer in the range 0-255 (in ui points). This should be
enough for most people.
If you want to manipulate rounding using `f32`, there is a new
`Roundingf` to fill that niche.
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I removed (I hope so) all wildcard imports I found.
For me on my pc this improved the build time:
- for egui -5s
- for eframe -12s
* [x] I have followed the instructions in the PR template
This is mostly a refactor, but has some performance benefits:
* We (re)use the same tessellator as for everything else, leading to
less allocations
* We cull shapes before rendering them
Adding `RectShape::blur_width` means it can also be used for other
effects, such as glow.
* Closes https://github.com/emilk/egui/issues/4238
The comment in the code explains it well, but the short of it is this:
we can't handle a shadow blur width larger than the shadow rectangle, so
we need to clamp the blur. This means smaller things will cast shadows
with a smaller blur width, but that's better than having visual
glitches.
I often write constants at the top of my widget files, as a "config". I
kept writing stuff like that :
```rust
const DEFAULT_INNER_MARGIN: Margin = Margin { left: 17., right: 17., top: 7., bottom: 7. };
```
So I prefixed constructors for `Margin`, `Rounding` and `Shadow` const.
No code was changed.
I also added a `Shadow::new()` for similar reasons.
* Note the namechange of egui::color to egui::ecolor
* Use a solid triangle for collapsing headers and windows
* Add Shadow::NONE
* Add Visuals::panel_fill, window_fill and window_stroke
* Bug fix: ComboBox::width sets the outer width of the ComboBox
* egui_extras::Table: add functions to access the `Ui` for the header/body
* ComboBox: use solid triangle
* Tweak default menu margin
* Nudge panel separator lines so they stay visible
* Update changelogs
Emil Ernerfeldt
Nicolas
0Qwel