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feat: centered selection when scrolling

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This commit is contained in:
Shawn
2024-05-22 00:19:32 +02:00
parent 58955e056f
commit ad03cd4d36
2 changed files with 17 additions and 5 deletions
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2
src/config.rs
View File

@@ -1,4 +1,4 @@
pub const MAX_ITEM_DISPLAY_COUNT: u16 = 10;
pub const MAX_ITEM_DISPLAY_COUNT: u16 = 9;
pub const PADDING: u16 = 8;
pub const LINE_SPACING: u16 = 2;
pub const FONT_POINT_SIZE: u16 = 16;

20
src/runner/mod.rs
View File

@@ -1,4 +1,4 @@
use std::time::Duration;
use std::{ops::Add, time::Duration};
use fuzzy_matcher::{skim::SkimMatcherV2, FuzzyMatcher};
use sdl2::{
@@ -183,6 +183,7 @@ impl Runner {
&mut filtered_executables,
&matcher,
);
selection_index = 0;
}
_ => {}
@@ -209,9 +210,18 @@ impl Runner {
let _ = self.canvas.copy(&texture, None, Some(rect));
}
let item_count = MAX_ITEM_DISPLAY_COUNT.min(filtered_executables.len() as u16);
for i in 0..item_count {
let offset = PADDING + (font.height() as u16 + LINE_SPACING) * (i + 1);
// try to keep the selection centered
let executables_len: u16 = filtered_executables.len() as u16;
let start: u16 = selection_index
.saturating_sub(MAX_ITEM_DISPLAY_COUNT.div_euclid(2))
.min(executables_len.saturating_sub(MAX_ITEM_DISPLAY_COUNT));
let end: u16 = (start + MAX_ITEM_DISPLAY_COUNT).min(executables_len);
// ---
let mut display_count: u16 = 0;
for i in start..end {
let offset = PADDING + (font.height() as u16 + LINE_SPACING) * (display_count + 1);
let surface = font
.render(&filtered_executables[i as usize])
@@ -245,6 +255,8 @@ impl Runner {
.expect("Error creating texture");
let _ = self.canvas.copy(&texture, None, Some(rect));
display_count += 1;
}
self.canvas.present();