Skip to content

Expose methods to change viewport alignment #1953

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
hecrj merged 3 commits into from
Jul 13, 2023
Merged

Expose methods to change viewport alignment #1953

Changes from 2 commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
11287c8
Expose methods to change viewport alignment
tarkah Jul 12, 2023
a9987cb
Introduce `absolute_offset_reversed` to `scrollable::Viewport`
hecrj Jul 13, 2023
d367584
Avoid redundant `max` in `absolute_offset_reversed`
hecrj Jul 13, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
16 changes: 16 additions & 0 deletions widget/src/scrollable.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1095,6 +1095,22 @@ impl Viewport {
AbsoluteOffset { x, y }
}

/// Returns the [`AbsoluteOffset`] of the current [`Viewport`], but with its
/// alignment reversed.
///
/// This method can be useful to switch the alignment of a [`Scrollable`]
/// while maintaining its scrolling position.
pub fn absolute_offset_reversed(&self) -> AbsoluteOffset {
let AbsoluteOffset { x, y } = self.absolute_offset();

AbsoluteOffset {
x: ((self.content_bounds.width - self.bounds.width).max(0.0) - x)
.max(0.0),
y: ((self.content_bounds.height - self.bounds.height).max(0.0) - y)
.max(0.0),
}
}

/// Returns the [`RelativeOffset`] of the current [`Viewport`].
pub fn relative_offset(&self) -> RelativeOffset {
let AbsoluteOffset { x, y } = self.absolute_offset();
Expand Down