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Add scrollable alignment option #1912

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Merged
hecrj merged 8 commits into from
Jul 12, 2023
Merged

Add scrollable alignment option #1912

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4f066b5
Add scrollable alignment option
tarkah Jun 13, 2023
905c307
Make viewport bounds public
tarkah Jun 13, 2023
d79cedd
Add alignment to Viewport
tarkah Jun 25, 2023
44460f7
Remove public fields from `Viewport`
hecrj Jul 12, 2023
2b2f9c0
Increase type-safety of `alignment` in `scrollable`
hecrj Jul 12, 2023
ca2afb0
Disambiguate `offset` from `translation` in `scrollable`
hecrj Jul 12, 2023
d07bac3
Rename `absolute_from_start` to `translation` in `scrollable`
hecrj Jul 12, 2023
ce23e08
Remove unnecessary cursor unavailability logic in `scrollable`
hecrj Jul 12, 2023
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52 changes: 45 additions & 7 deletions examples/scrollable/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@ struct ScrollableDemo {
scrollbar_margin: u16,
scroller_width: u16,
current_scroll_offset: scrollable::RelativeOffset,
alignment: scrollable::Alignment,
}

#[derive(Debug, Clone, Eq, PartialEq, Copy)]
Expand All @@ -32,6 +33,7 @@ enum Direction {
#[derive(Debug, Clone)]
enum Message {
SwitchDirection(Direction),
AlignmentChanged(scrollable::Alignment),
ScrollbarWidthChanged(u16),
ScrollbarMarginChanged(u16),
ScrollerWidthChanged(u16),
Expand All @@ -54,6 +56,7 @@ impl Application for ScrollableDemo {
scrollbar_margin: 0,
scroller_width: 10,
current_scroll_offset: scrollable::RelativeOffset::START,
alignment: scrollable::Alignment::Start,
},
Command::none(),
)
Expand All @@ -74,6 +77,15 @@ impl Application for ScrollableDemo {
self.current_scroll_offset,
)
}
Message::AlignmentChanged(alignment) => {
self.current_scroll_offset = scrollable::RelativeOffset::START;
self.alignment = alignment;

scrollable::snap_to(
SCROLLABLE_ID.clone(),
self.current_scroll_offset,
)
}
Message::ScrollbarWidthChanged(width) => {
self.scrollbar_width = width;

Expand Down Expand Up @@ -165,10 +177,33 @@ impl Application for ScrollableDemo {
.spacing(10)
.width(Length::Fill);

let scroll_controls =
row![scroll_slider_controls, scroll_orientation_controls]
.spacing(20)
.width(Length::Fill);
let scroll_alignment_controls = column(vec![
text("Scrollable alignment:").into(),
radio(
"Start",
scrollable::Alignment::Start,
Some(self.alignment),
Message::AlignmentChanged,
)
.into(),
radio(
"End",
scrollable::Alignment::End,
Some(self.alignment),
Message::AlignmentChanged,
)
.into(),
])
.spacing(10)
.width(Length::Fill);

let scroll_controls = row![
scroll_slider_controls,
scroll_orientation_controls,
scroll_alignment_controls
]
.spacing(20)
.width(Length::Fill);

let scroll_to_end_button = || {
button("Scroll to end")
Expand Down Expand Up @@ -204,7 +239,8 @@ impl Application for ScrollableDemo {
Properties::new()
.width(self.scrollbar_width)
.margin(self.scrollbar_margin)
.scroller_width(self.scroller_width),
.scroller_width(self.scroller_width)
.alignment(self.alignment),
))
.id(SCROLLABLE_ID.clone())
.on_scroll(Message::Scrolled),
Expand All @@ -228,7 +264,8 @@ impl Application for ScrollableDemo {
Properties::new()
.width(self.scrollbar_width)
.margin(self.scrollbar_margin)
.scroller_width(self.scroller_width),
.scroller_width(self.scroller_width)
.alignment(self.alignment),
))
.style(theme::Scrollable::custom(ScrollbarCustomStyle))
.id(SCROLLABLE_ID.clone())
Expand Down Expand Up @@ -269,7 +306,8 @@ impl Application for ScrollableDemo {
let properties = Properties::new()
.width(self.scrollbar_width)
.margin(self.scrollbar_margin)
.scroller_width(self.scroller_width);
.scroller_width(self.scroller_width)
.alignment(self.alignment);

scrollable::Direction::Both {
horizontal: properties,
Expand Down
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