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More natural thumb drag

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This commit is contained in:
Alexandre Bury 2017-10-12 12:35:57 -07:00
parent e7da474769
commit f5492da4e4
1 changed files with 7 additions and 4 deletions
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11
src/view/scroll.rs
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@ -1,8 +1,8 @@
use Printer;
use div::div_up;
use std::cmp::{max, min};
use theme::ColorStyle;
use vec::Vec2;
use div::div_up;
/// Provide scrolling functionalities to a view.
///
@ -149,8 +149,10 @@ impl ScrollBase {
// The saturating_sub is there to stop at the bottom of the content.
// eprintln!("Scrolling to {}", thumb_y);
self.start_line = min(
div_up((1 + self.content_height - self.view_height) * thumb_y
, (self.view_height - thumb_height + 1)),
div_up(
(1 + self.content_height - self.view_height) * thumb_y,
(self.view_height - thumb_height + 1),
),
self.content_height - self.view_height,
);
}
@ -181,7 +183,8 @@ impl ScrollBase {
self.thumb_grab = position.y - thumb_y;
} else {
// Just jump a bit...
self.thumb_grab = height / 2;
self.thumb_grab = (height - 1) / 2;
eprintln!("Grabbed at {}", self.thumb_grab);
self.drag(position);
}