73 lines
1.5 KiB
Rust
73 lines
1.5 KiB
Rust
use crate::widget::Widget;
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pub struct ScrollState<const N: usize>(pub usize, pub [usize; N]);
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pub struct ScrollText {
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pub scroll: usize,
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pub title: String,
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pub text: String,
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}
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impl Widget for ScrollText {
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fn render(&self, scope: &mut crate::render::RenderScope) {
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scope.draw_text(0, &self.title);
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let title_lines = self.title.lines().count();
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let mut y = title_lines as u16;
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for line in self
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.text
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.lines()
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.skip(self.scroll)
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.take(scope.rect.height as usize - title_lines)
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{
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y += scope.draw_text((0, y), line);
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}
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}
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}
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impl<const N: usize> ScrollState<N> {
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pub fn get_selected(&self, index: usize) -> &'static str {
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if index == self.0 {
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"\x1b[4m\x1b[1m"
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} else {
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"\x1b[1m"
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}
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}
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pub fn scroll(&self, index: usize, title: String, text: String) -> ScrollText {
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ScrollText {
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scroll: self.1[index],
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title,
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text,
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}
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}
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pub fn up(&mut self) {
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if self.1[self.0] > 0 {
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self.1[self.0] -= 1;
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}
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}
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pub fn down(&mut self) {
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self.1[self.0] += 1;
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}
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pub fn back_tab(&mut self) {
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if self.0 > 0 {
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self.0 -= 1;
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} else {
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self.0 = N - 1;
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}
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}
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pub fn tab(&mut self) {
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if self.0 + 1 < N {
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self.0 += 1;
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} else {
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self.0 = 0;
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}
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}
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}
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