Add Printer::{shrinked,cropped}_centered

This commit is contained in:
Alexandre Bury 2019-03-04 12:34:50 -08:00
parent 5d51ccb9ad
commit e839bb8274
2 changed files with 35 additions and 1 deletions

View File

@ -29,6 +29,7 @@
`Cursive::cb_sink()`
- Add `LinearLayout::{insert_child, swap_children, set_weight}` for more
in-place modifications.
- Add `Printer::{cropped_centered,shrinked_centered}`
### Improvements

View File

@ -461,7 +461,7 @@ impl<'a, 'b> Printer<'a, 'b> {
/// Returns a sub-printer with the given offset.
///
/// It will print in an area slightly to the bottom/right.
pub fn offset<S>(&self, offset: S) -> Printer<'_, '_>
pub fn offset<S>(&self, offset: S) -> Self
where
S: Into<Vec2>,
{
@ -517,6 +517,24 @@ impl<'a, 'b> Printer<'a, 'b> {
})
}
/// Returns a new sub-printer with a cropped area.
///
/// The new printer size will be the minimum of `size` and its current size.
///
/// The view will stay centered.
///
/// Note that if shrinking by an odd number, the view will round to the top-left.
pub fn cropped_centered<S>(&self, size: S) -> Self
where
S: Into<Vec2>,
{
let size = size.into();
let borders = self.size.saturating_sub(size);
let half_borders = borders / 2;
self.cropped(size).offset(half_borders)
}
/// Returns a new sub-printer with a shrinked area.
///
/// The printer size will be reduced by the given border from the bottom-right.
@ -527,6 +545,21 @@ impl<'a, 'b> Printer<'a, 'b> {
self.cropped(self.size.saturating_sub(borders))
}
/// Returns a new sub-printer with a shrinked area.
///
/// The printer size will be reduced by the given border, and will stay centered.
///
/// Note that if shrinking by an odd number, the view will round to the top-left.
pub fn shrinked_centered<S>(&self, borders: S) -> Self
where
S: Into<Vec2>,
{
let borders = borders.into();
let half_borders = borders / 2;
self.shrinked(borders).offset(half_borders)
}
/// Returns a new sub-printer with a content offset.
pub fn content_offset<S>(&self, offset: S) -> Self
where