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add scrolling to pick_lists

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This commit is contained in:
13r0ck 2021-05-10 14:29:35 -06:00
parent 08f5591148
commit 77e6e111e0
1 changed files with 68 additions and 0 deletions
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68
native/src/widget/pick_list.rs
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@ -25,6 +25,7 @@ where
on_selected: Box<dyn Fn(T) -> Message>,
options: Cow<'a, [T]>,
selected: Option<T>,
on_change: Option<Message>,
width: Length,
padding: u16,
text_size: Option<u16>,
@ -82,6 +83,7 @@ where
on_selected: Box::new(on_selected),
options: options.into(),
selected,
on_change: None,
width: Length::Shrink,
text_size: None,
padding: Renderer::DEFAULT_PADDING,
@ -114,6 +116,12 @@ where
self
}
/// Sets the message sent when [`PickList`] selection changes
pub fn on_change(mut self, msg: Message) -> Self {
self.on_change = Some(msg);
self
}
/// Sets the style of the [`PickList`].
pub fn style(
mut self,
@ -247,6 +255,66 @@ where
event_status
}
}
Event::Mouse(mouse::Event::WheelScrolled { delta })
if layout.bounds().contains(cursor_position)
&& !*self.is_open =>
{
let y = match delta {
mouse::ScrollDelta::Lines { y, .. }
| mouse::ScrollDelta::Pixels { y, .. } => y,
};
if y.is_sign_negative() {
if let Some(selected) = self.selected.as_ref() {
let i = self
.options
.iter()
.position(|option| option == selected)
.unwrap_or(0)
+ 1;
if i < self.options.len() {
messages.push((self.on_selected)(
self.options[i].clone(),
));
if let Some(msg) = self.on_change.take() {
messages.push(msg)
}
}
} else {
messages
.push((self.on_selected)(self.options[0].clone()));
if let Some(msg) = self.on_change.take() {
messages.push(msg)
}
}
} else {
if let Some(selected) = self.selected.as_ref() {
let i = self
.options
.iter()
.position(|option| option == selected)
.unwrap_or(0);
if i != 0 {
messages.push((self.on_selected)(
self.options[i - 1].clone(),
));
if let Some(msg) = self.on_change.take() {
messages.push(msg)
}
}
} else {
messages.push((self.on_selected)(
self.options[self.options.len() - 1].clone(),
));
if let Some(msg) = self.on_change.take() {
messages.push(msg)
}
}
}
return event::Status::Captured;
}
_ => event::Status::Ignored,
}
}