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Add simple scrollbar

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This commit is contained in:
Jeremy Soller 2023-10-31 09:34:34 -06:00
parent 22432e60b0
commit 7d83a37cfa
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GPG key ID: DCFCA852D3906975
1 changed files with 31 additions and 1 deletions
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32
src/text_box.rs
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@ -243,8 +243,9 @@ where
let image_w = (view_w as f64 * scale_factor) as i32;
let image_h = (view_h as f64 * scale_factor) as i32;
let scrollbar_w = (8.0 * scale_factor) as i32;
if image_w <= 0 || image_h <= 0 {
if image_w <= scrollbar_w || image_h <= 0 {
// Zero sized image
return;
}
@ -287,6 +288,35 @@ where
draw_rect(buffer, image_w, image_h, x, y, w as i32, h as i32, color.0);
},
);
// Draw scrollbar
{
let mut start_line_opt = None;
let mut end_line = 0;
for run in editor.buffer().layout_runs() {
end_line = run.line_i;
if start_line_opt.is_none() {
start_line_opt = Some(end_line);
}
}
let start_line = start_line_opt.unwrap_or(end_line);
let lines = editor.buffer().lines.len();
let start_y = (start_line * image_h as usize) / lines;
let end_y = (end_line * image_h as usize) / lines;
if end_y > start_y {
draw_rect(
buffer,
image_w,
image_h,
image_w - scrollbar_w,
start_y as i32,
scrollbar_w,
(end_y - start_y) as i32,
0x40FFFFFF,
);
}
}
}
// Clear redraw flag