Add multidirectional scrolling capabilities to the existing Scrollable.
This commit is contained in:
Bingus
bungoboingo
parent
a6d0d5773f
commit
d91f4f6aa7
12 changed files with 1148 additions and 576 deletions
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@ -1,44 +1,60 @@
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use iced::executor;
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use iced::widget::scrollable::{Scrollbar, Scroller};
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use iced::widget::{
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button, column, container, horizontal_rule, progress_bar, radio,
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scrollable, text, vertical_space, Row,
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button, column, container, horizontal_space, progress_bar, radio, row,
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scrollable, slider, text, vertical_space,
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};
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use iced::{executor, theme, Alignment, Color, Vector};
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use iced::{Application, Command, Element, Length, Settings, Theme};
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use lazy_static::lazy_static;
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lazy_static! {
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static ref SCROLLABLE_ID: scrollable::Id = scrollable::Id::unique();
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}
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pub fn main() -> iced::Result {
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ScrollableDemo::run(Settings::default())
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}
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struct ScrollableDemo {
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theme: Theme,
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variants: Vec<Variant>,
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scrollable_direction: Direction,
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scrollbar_width: u16,
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scrollbar_margin: u16,
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scroller_width: u16,
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current_scroll_offset: Vector<f32>,
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}
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#[derive(Debug, PartialEq, Eq, Clone, Copy)]
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enum ThemeType {
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Light,
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Dark,
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#[derive(Debug, Clone, Eq, PartialEq, Copy)]
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enum Direction {
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Vertical,
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Horizontal,
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Multi,
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}
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#[derive(Debug, Clone)]
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enum Message {
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ThemeChanged(ThemeType),
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ScrollToTop(usize),
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ScrollToBottom(usize),
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Scrolled(usize, f32),
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SwitchDirection(Direction),
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ScrollbarWidthChanged(u16),
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ScrollbarMarginChanged(u16),
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ScrollerWidthChanged(u16),
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ScrollToBeginning(scrollable::Direction),
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ScrollToEnd(scrollable::Direction),
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Scrolled(Vector<f32>),
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}
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impl Application for ScrollableDemo {
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type Executor = executor::Default;
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type Message = Message;
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type Theme = Theme;
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type Executor = executor::Default;
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type Flags = ();
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fn new(_flags: Self::Flags) -> (Self, Command<Message>) {
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(
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ScrollableDemo {
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theme: Default::default(),
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variants: Variant::all(),
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scrollable_direction: Direction::Vertical,
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scrollbar_width: 10,
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scrollbar_margin: 0,
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scroller_width: 10,
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current_scroll_offset: Vector::new(0.0, 0.0),
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},
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Command::none(),
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)
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@ -50,209 +66,333 @@ impl Application for ScrollableDemo {
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fn update(&mut self, message: Message) -> Command<Message> {
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match message {
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Message::ThemeChanged(theme) => {
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self.theme = match theme {
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ThemeType::Light => Theme::Light,
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ThemeType::Dark => Theme::Dark,
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};
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Message::SwitchDirection(direction) => {
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self.current_scroll_offset = Vector::new(0.0, 0.0);
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self.scrollable_direction = direction;
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Command::none()
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}
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Message::ScrollToTop(i) => {
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if let Some(variant) = self.variants.get_mut(i) {
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variant.latest_offset = 0.0;
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Message::ScrollbarWidthChanged(width) => {
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self.scrollbar_width = width;
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scrollable::snap_to(Variant::id(i), 0.0)
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} else {
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Command::none()
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}
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Command::none()
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}
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Message::ScrollToBottom(i) => {
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if let Some(variant) = self.variants.get_mut(i) {
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variant.latest_offset = 1.0;
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Message::ScrollbarMarginChanged(margin) => {
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self.scrollbar_margin = margin;
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scrollable::snap_to(Variant::id(i), 1.0)
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} else {
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Command::none()
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}
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Command::none()
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}
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Message::Scrolled(i, offset) => {
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if let Some(variant) = self.variants.get_mut(i) {
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variant.latest_offset = offset;
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Message::ScrollerWidthChanged(width) => {
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self.scroller_width = width;
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Command::none()
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}
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Message::ScrollToBeginning(direction) => {
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match direction {
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scrollable::Direction::Horizontal => {
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self.current_scroll_offset.x = 0.0;
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}
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scrollable::Direction::Vertical => {
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self.current_scroll_offset.y = 0.0;
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}
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}
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scrollable::snap_to(
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SCROLLABLE_ID.clone(),
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Vector::new(
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self.current_scroll_offset.x,
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self.current_scroll_offset.y,
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),
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)
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}
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Message::ScrollToEnd(direction) => {
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match direction {
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scrollable::Direction::Horizontal => {
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self.current_scroll_offset.x = 1.0;
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}
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scrollable::Direction::Vertical => {
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self.current_scroll_offset.y = 1.0;
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}
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}
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scrollable::snap_to(
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SCROLLABLE_ID.clone(),
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Vector::new(
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self.current_scroll_offset.x,
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self.current_scroll_offset.y,
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),
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)
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}
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Message::Scrolled(offset) => {
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self.current_scroll_offset = offset;
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Command::none()
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}
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}
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}
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fn view(&self) -> Element<Message> {
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let ScrollableDemo { variants, .. } = self;
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let choose_theme = [ThemeType::Light, ThemeType::Dark].iter().fold(
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column!["Choose a theme:"].spacing(10),
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|column, option| {
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column.push(radio(
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format!("{:?}", option),
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*option,
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Some(*option),
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Message::ThemeChanged,
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))
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},
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let scrollbar_width_slider = slider(
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0..=15,
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self.scrollbar_width,
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Message::ScrollbarWidthChanged,
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);
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let scrollbar_margin_slider = slider(
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0..=15,
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self.scrollbar_margin,
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Message::ScrollbarMarginChanged,
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);
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let scroller_width_slider =
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slider(0..=15, self.scroller_width, Message::ScrollerWidthChanged);
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let scrollable_row = Row::with_children(
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variants
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.iter()
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.enumerate()
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.map(|(i, variant)| {
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let mut contents = column![
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variant.title,
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button("Scroll to bottom",)
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.width(Length::Fill)
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.padding(10)
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.on_press(Message::ScrollToBottom(i)),
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]
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.padding(10)
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.spacing(10)
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.width(Length::Fill);
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let scroll_slider_controls = column![
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text("Scrollbar width:"),
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scrollbar_width_slider,
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text("Scrollbar margin:"),
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scrollbar_margin_slider,
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text("Scroller width:"),
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scroller_width_slider,
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]
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.width(Length::Fill);
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if let Some(scrollbar_width) = variant.scrollbar_width {
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contents = contents.push(text(format!(
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"scrollbar_width: {:?}",
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scrollbar_width
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)));
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}
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let scroll_orientation_controls = column(vec![
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text("Scrollbar direction:").into(),
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radio(
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"Vertical",
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Direction::Vertical,
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Some(self.scrollable_direction),
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Message::SwitchDirection,
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)
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.into(),
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radio(
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"Horizontal",
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Direction::Horizontal,
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Some(self.scrollable_direction),
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Message::SwitchDirection,
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)
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.into(),
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radio(
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"Both!",
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Direction::Multi,
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Some(self.scrollable_direction),
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Message::SwitchDirection,
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)
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.into(),
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])
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.width(Length::Fill);
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if let Some(scrollbar_margin) = variant.scrollbar_margin {
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contents = contents.push(text(format!(
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"scrollbar_margin: {:?}",
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scrollbar_margin
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)));
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}
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let scroll_controls =
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row![scroll_slider_controls, scroll_orientation_controls]
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.spacing(20)
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.width(Length::Fill);
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if let Some(scroller_width) = variant.scroller_width {
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contents = contents.push(text(format!(
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"scroller_width: {:?}",
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scroller_width
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)));
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}
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let scroll_to_end_button = |direction: scrollable::Direction| {
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button("Scroll to end")
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.padding(10)
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.width(Length::Units(120))
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.on_press(Message::ScrollToEnd(direction))
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};
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contents = contents
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.push(vertical_space(Length::Units(100)))
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.push(
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"Some content that should wrap within the \
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scrollable. Let's output a lot of short words, so \
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that we'll make sure to see how wrapping works \
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with these scrollbars.",
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)
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.push(vertical_space(Length::Units(1200)))
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.push("Middle")
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.push(vertical_space(Length::Units(1200)))
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.push("The End.")
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.push(
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button("Scroll to top")
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.width(Length::Fill)
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.padding(10)
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.on_press(Message::ScrollToTop(i)),
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);
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let mut scrollable = scrollable(contents)
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.id(Variant::id(i))
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.height(Length::Fill)
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.on_scroll(move |offset| Message::Scrolled(i, offset));
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if let Some(scrollbar_width) = variant.scrollbar_width {
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scrollable =
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scrollable.scrollbar_width(scrollbar_width);
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}
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if let Some(scrollbar_margin) = variant.scrollbar_margin {
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scrollable =
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scrollable.scrollbar_margin(scrollbar_margin);
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}
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if let Some(scroller_width) = variant.scroller_width {
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scrollable = scrollable.scroller_width(scroller_width);
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}
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let scroll_to_beginning_button = |direction: scrollable::Direction| {
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button("Scroll to beginning")
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.padding(10)
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.width(Length::Units(120))
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.on_press(Message::ScrollToBeginning(direction))
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};
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let scrollable_content: Element<Message> =
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Element::from(match self.scrollable_direction {
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Direction::Vertical => scrollable(
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column![
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scrollable,
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progress_bar(0.0..=1.0, variant.latest_offset,)
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scroll_to_end_button(scrollable::Direction::Vertical),
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text("Beginning!"),
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vertical_space(Length::Units(1200)),
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text("Middle!"),
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vertical_space(Length::Units(1200)),
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text("End!"),
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scroll_to_beginning_button(
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scrollable::Direction::Vertical
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),
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]
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.width(Length::Fill)
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.height(Length::Fill)
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.spacing(10)
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.align_items(Alignment::Center)
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.padding([40, 0, 40, 0])
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.spacing(40),
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)
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.height(Length::Fill)
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.scrollbar_width(self.scrollbar_width)
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.scrollbar_margin(self.scrollbar_margin)
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.scroller_width(self.scroller_width)
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.id(SCROLLABLE_ID.clone())
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.on_scroll(Message::Scrolled),
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Direction::Horizontal => scrollable(
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row![
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scroll_to_end_button(scrollable::Direction::Horizontal),
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text("Beginning!"),
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horizontal_space(Length::Units(1200)),
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text("Middle!"),
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horizontal_space(Length::Units(1200)),
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text("End!"),
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scroll_to_beginning_button(
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scrollable::Direction::Horizontal
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),
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]
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.height(Length::Units(450))
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.align_items(Alignment::Center)
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.padding([0, 40, 0, 40])
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.spacing(40),
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)
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.height(Length::Fill)
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.horizontal_scroll(
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scrollable::Horizontal::new()
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.scrollbar_height(self.scrollbar_width)
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.scrollbar_margin(self.scrollbar_margin)
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.scroller_height(self.scroller_width),
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)
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.style(theme::Scrollable::Custom(Box::new(
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ScrollbarCustomStyle,
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)))
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.id(SCROLLABLE_ID.clone())
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.on_scroll(Message::Scrolled),
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Direction::Multi => scrollable(
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//horizontal content
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row![
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column![
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text("Let's do some scrolling!"),
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vertical_space(Length::Units(2400))
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],
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scroll_to_end_button(scrollable::Direction::Horizontal),
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text("Horizontal - Beginning!"),
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horizontal_space(Length::Units(1200)),
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//vertical content
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column![
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text("Horizontal - Middle!"),
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scroll_to_end_button(
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scrollable::Direction::Vertical
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),
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text("Vertical - Beginning!"),
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vertical_space(Length::Units(1200)),
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text("Vertical - Middle!"),
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vertical_space(Length::Units(1200)),
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text("Vertical - End!"),
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scroll_to_beginning_button(
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scrollable::Direction::Vertical
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)
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]
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.align_items(Alignment::Fill)
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.spacing(40),
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horizontal_space(Length::Units(1200)),
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text("Horizontal - End!"),
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scroll_to_beginning_button(
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scrollable::Direction::Horizontal
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),
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]
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.align_items(Alignment::Center)
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.padding([0, 40, 0, 40])
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.spacing(40),
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)
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.height(Length::Fill)
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.scrollbar_width(self.scrollbar_width)
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.scrollbar_margin(self.scrollbar_margin)
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.scroller_width(self.scroller_width)
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.horizontal_scroll(
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scrollable::Horizontal::new()
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.scrollbar_height(self.scrollbar_width)
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.scrollbar_margin(self.scrollbar_margin)
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.scroller_height(self.scroller_width),
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)
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.style(theme::Scrollable::Custom(Box::new(
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ScrollbarCustomStyle,
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)))
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.id(SCROLLABLE_ID.clone())
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.on_scroll(Message::Scrolled),
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});
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let progress_bars: Element<Message> = match self.scrollable_direction {
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Direction::Vertical => {
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progress_bar(0.0..=1.0, self.current_scroll_offset.y).into()
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}
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Direction::Horizontal => {
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progress_bar(0.0..=1.0, self.current_scroll_offset.x)
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.style(theme::ProgressBar::Custom(Box::new(
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ProgressBarCustomStyle,
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)))
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.into()
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})
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.collect(),
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}
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Direction::Multi => column![
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progress_bar(0.0..=1.0, self.current_scroll_offset.y),
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progress_bar(0.0..=1.0, self.current_scroll_offset.x).style(
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theme::ProgressBar::Custom(Box::new(
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ProgressBarCustomStyle,
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))
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)
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]
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.spacing(10)
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.into(),
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};
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let content: Element<Message> =
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column![scroll_controls, scrollable_content, progress_bars]
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.width(Length::Fill)
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.height(Length::Fill)
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.align_items(Alignment::Center)
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.spacing(10)
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.into();
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Element::from(
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container(content)
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.width(Length::Fill)
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.height(Length::Fill)
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.padding(40)
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.center_x()
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.center_y(),
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)
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.spacing(20)
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.width(Length::Fill)
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.height(Length::Fill);
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let content =
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column![choose_theme, horizontal_rule(20), scrollable_row]
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.spacing(20)
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.padding(20);
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container(content)
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.width(Length::Fill)
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.height(Length::Fill)
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.center_x()
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.center_y()
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.into()
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}
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fn theme(&self) -> Theme {
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self.theme.clone()
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fn theme(&self) -> Self::Theme {
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Theme::Dark
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}
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}
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/// A version of a scrollable
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struct Variant {
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title: &'static str,
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scrollbar_width: Option<u16>,
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scrollbar_margin: Option<u16>,
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scroller_width: Option<u16>,
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latest_offset: f32,
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}
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struct ScrollbarCustomStyle;
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impl Variant {
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pub fn all() -> Vec<Self> {
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vec![
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Self {
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title: "Default Scrollbar",
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scrollbar_width: None,
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scrollbar_margin: None,
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scroller_width: None,
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latest_offset: 0.0,
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},
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Self {
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title: "Slimmed & Margin",
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scrollbar_width: Some(4),
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scrollbar_margin: Some(3),
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scroller_width: Some(4),
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||||
latest_offset: 0.0,
|
||||
},
|
||||
Self {
|
||||
title: "Wide Scroller",
|
||||
scrollbar_width: Some(4),
|
||||
scrollbar_margin: None,
|
||||
scroller_width: Some(10),
|
||||
latest_offset: 0.0,
|
||||
},
|
||||
Self {
|
||||
title: "Narrow Scroller",
|
||||
scrollbar_width: Some(10),
|
||||
scrollbar_margin: None,
|
||||
scroller_width: Some(4),
|
||||
latest_offset: 0.0,
|
||||
},
|
||||
]
|
||||
impl scrollable::StyleSheet for ScrollbarCustomStyle {
|
||||
type Style = Theme;
|
||||
|
||||
fn active(&self, style: &Self::Style) -> Scrollbar {
|
||||
style.active(&theme::Scrollable::Default)
|
||||
}
|
||||
|
||||
pub fn id(i: usize) -> scrollable::Id {
|
||||
scrollable::Id::new(format!("scrollable-{}", i))
|
||||
fn hovered(&self, style: &Self::Style) -> Scrollbar {
|
||||
style.hovered(&theme::Scrollable::Default)
|
||||
}
|
||||
|
||||
fn hovered_horizontal(&self, style: &Self::Style) -> Scrollbar {
|
||||
Scrollbar {
|
||||
background: style.active(&theme::Scrollable::default()).background,
|
||||
border_radius: 0.0,
|
||||
border_width: 0.0,
|
||||
border_color: Default::default(),
|
||||
scroller: Scroller {
|
||||
color: Color::from_rgb8(250, 85, 134),
|
||||
border_radius: 0.0,
|
||||
border_width: 0.0,
|
||||
border_color: Default::default(),
|
||||
},
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
struct ProgressBarCustomStyle;
|
||||
|
||||
impl progress_bar::StyleSheet for ProgressBarCustomStyle {
|
||||
type Style = Theme;
|
||||
|
||||
fn appearance(&self, style: &Self::Style) -> progress_bar::Appearance {
|
||||
progress_bar::Appearance {
|
||||
background: style.extended_palette().background.strong.color.into(),
|
||||
bar: Color::from_rgb8(250, 85, 134).into(),
|
||||
border_radius: 0.0,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
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Reference in a new issue