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circular navigation

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This commit is contained in:
dvkt 2019-12-27 10:52:52 -08:00
parent c815c01df4
commit 8d88eb9088
1 changed files with 27 additions and 18 deletions
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45
src/menu.rs
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@ -212,7 +212,7 @@ impl Menu {
}
let padding = self.padding_bottom();
if self.scroll <= padding {
if self.scroll < padding {
self.scroll += SCROLL_LINES;
if self.scroll > padding {
self.scroll = padding;
@ -221,24 +221,26 @@ impl Menu {
return Action::Redraw;
}
}
if let Some(dir) = self.link_visibility(self.link) {
match dir {
LinkPos::Above => {
let scroll = self.scroll;
if let Some(&pos) =
self.links.iter().skip(self.link).find(|&&i| i >= scroll)
{
self.link = self.lines.get(pos).unwrap().link;
}
}
LinkPos::Below => {}
LinkPos::Visible => {}
}
}
Action::Redraw
} else {
Action::None
if !self.links.is_empty() {
self.link = self.links.len() - 1;
return Action::Redraw;
}
}
if let Some(dir) = self.link_visibility(self.link) {
match dir {
LinkPos::Above => {
let scroll = self.scroll;
if let Some(&pos) = self.links.iter().skip(self.link).find(|&&i| i >= scroll) {
self.link = self.lines.get(pos).unwrap().link;
return Action::Redraw;
}
}
LinkPos::Below => {}
LinkPos::Visible => {}
}
}
Action::None
}
fn action_page_up(&mut self) -> Action {
@ -283,6 +285,10 @@ impl Menu {
return if self.scroll > 0 {
self.scroll -= 1;
Action::Redraw
} else if !self.links.is_empty() {
self.link = self.links.len() - 1;
self.scroll_to(self.link);
Action::Redraw
} else {
Action::None
};
@ -379,7 +385,10 @@ impl Menu {
self.scroll += 1;
return Action::Redraw;
} else {
return Action::None;
// wrap around
self.link = 0;
self.scroll_to(self.link);
return Action::Redraw;
}
}