* use f64 when accumulating virtual height above and below visible
region
* break the big loop iterating over heights into three loops, one for
each non-visible region, and one for the visible region
* retain each row's stripe color using an enumeration over the given
heights iterator
* use a VIRTUAL_EXTENSION constant to extend the "visible" region of the
table above and below the actual visible region to provide the
illusion of rows sliding into and out of sight
Introduce `TableBody.heterogenous_rows` and `TableRowBuilder`, the former of which takes as an argument the latter. `TableRowBuilder` provides two methods that enable virtual scrolling for rows with non-uniform heights. Those methods are:
* `TableRowBuilder.row_heights` which returns an iterator over `f32` to allow incremental virtual scroll buffer calculation.
* `TableRowBuilder.populate_row` which `TableBody.heterogenous_rows` uses to allow `TableRowBuilder` implementations to, you guessed it, populate rows that are visible.
One thought that occurs to me while writing this description is that
`TableBody.heterogenous_rows` could look more like the following:
```
pub fn heterogenous_rows(
mut self,
row_heights: impl Iterator<Item = f32> + '_,
mut row: impl FnMut(usize, TableRow<'_, '_>),
)
```
This could potentially be easier to use, considering all the trouble I had coming up with and implementing the trait. Happy to make this change if the maintainers prefer.
* Clip by default
* Fix some spacing bugs
* datepicker: look nicer in light mode
* datepicker: show month names
* Table: don't allow resize of last column if it is Size::Remainder
* Let 1D strips fill up parent width/height
* Add Strip + Table + DatePicker to egui_extras changelog
* Expose some dragging- and pointer related context/memory methods
* Make tables resizable
This can be used, for instance, to:
* Render things to offscreen buffers.
* Read the pixel buffer from the previous frame (glow::Context::read_pixels).
* Render things behind the egui windows.
The purpose of this is to expose `frame.storage()` and `frame.storage_mut()` so users can save/load app state from the `App::update` function, without having to add another parameter to that function.
Changes:
* Added `Frame::storage()` and `Frame::storage_mut()`
* `App::update` now takes a `&mut Frame` rather than just `&Frame`
* `Frame` is no longer `Clone` or `Sync` (doesn't have to be since https://github.com/emilk/egui/pull/1366)
* Rename AlphaImage to FontImage to discourage any other use for it
* Encode FontImage as f32 and postpone the alpha correction
* Interpret alpha coverage in a new, making dark text darker, improving contrast in bright mode
It was noted that the problems with Firefox on Linux/MacOS have been resolved in #1377 and the limitation on the canvas size was lifted in commit 465c96122c
The epaint tessellator uses "feathering" to accomplish anti-aliasing. This PS allows you to control the feathering size, i.e. how blurry the edges of epaint shapes are.
This changes the interface of Tessellator slightly, and renames some options in TessellationOptions.
