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Implement horizontal scrollbar drag, fixes #59

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This commit is contained in:
Jeremy Soller 2024-05-31 08:14:36 -06:00
parent fe280423b8
commit 0ae48666d8
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GPG key ID: D02FD439211AF56F
1 changed files with 32 additions and 2 deletions
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34
src/text_box.rs
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@ -1003,7 +1003,21 @@ where
let y_logical = p.y - self.padding.top;
let mut x = x_logical * scale_factor - editor_offset_x as f32;
let y = y_logical * scale_factor;
if x >= 0.0 && x < buffer_size.0 && y >= 0.0 && y < buffer_size.1 {
// Do this first as the horizontal scrollbar is on top of the buffer
if let Some(scrollbar_h_rect) = state.scrollbar_h_rect.get() {
if scrollbar_h_rect.contains(Point::new(x_logical, y_logical)) {
state.dragging = Some(Dragging::ScrollbarH {
start_x: x,
start_scroll: editor.with_buffer(|buffer| buffer.scroll()),
});
}
}
if matches!(state.dragging, Some(Dragging::ScrollbarH { .. })) {
// The horizontal scrollbar is on top of the buffer,
// so we need to ignore clicks when it is being dragged
} else if x >= 0.0 && x < buffer_size.0 && y >= 0.0 && y < buffer_size.1 {
x += buffer_scroll.horizontal;
let click_kind =
if let Some((click_kind, click_time)) = state.click.take() {
@ -1110,7 +1124,23 @@ where
start_x,
start_scroll,
} => {
//TODO: horizontal scrollbar drag
editor.with_buffer_mut(|buffer| {
//TODO: store this in state?
let mut max_line_width = 0.0;
for run in buffer.layout_runs() {
if run.line_w > max_line_width {
max_line_width = run.line_w;
}
}
let buffer_w = buffer.size().0;
let mut scroll = buffer.scroll();
scroll.horizontal = (((x - start_x) / buffer_w)
* max_line_width)
.max(0.0)
.min(max_line_width - buffer_w);
buffer.set_scroll(scroll);
});
}
}
}