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Implement touchpad scroll

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This commit is contained in:
Jeremy Soller 2023-11-13 09:49:52 -07:00
parent 7170e64f4a
commit 18f2ca563f
2 changed files with 30 additions and 8 deletions
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30
src/text_box.rs
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@ -533,12 +533,32 @@ where
}
Event::Mouse(MouseEvent::WheelScrolled { delta }) => match delta {
ScrollDelta::Lines { x, y } => {
editor.action(Action::Scroll {
lines: (-y * 6.0) as i32,
});
//TODO: this adjustment is just a guess!
state.scroll_pixels = 0.0;
let lines = (-y * 6.0) as i32;
if lines != 0 {
editor.action(Action::Scroll { lines });
}
status = Status::Captured;
}
ScrollDelta::Pixels { x, y } => {
//TODO: this adjustment is just a guess!
state.scroll_pixels -= y * 6.0;
let mut lines = 0;
let metrics = editor.buffer().metrics();
while state.scroll_pixels <= -metrics.line_height {
lines -= 1;
state.scroll_pixels += metrics.line_height;
}
while state.scroll_pixels >= metrics.line_height {
lines += 1;
state.scroll_pixels -= metrics.line_height;
}
if lines != 0 {
editor.action(Action::Scroll { lines });
}
status = Status::Captured;
}
_ => (),
},
_ => (),
}
@ -566,6 +586,7 @@ pub struct State {
modifiers: Modifiers,
dragging: Option<Dragging>,
scale_factor: Cell<f32>,
scroll_pixels: f32,
scrollbar_rect: Cell<Rectangle<f32>>,
handle: Mutex<image::Handle>,
}
@ -577,6 +598,7 @@ impl State {
modifiers: Modifiers::empty(),
dragging: None,
scale_factor: Cell::new(1.0),
scroll_pixels: 0.0,
scrollbar_rect: Cell::new(Rectangle::default()),
//TODO: make option!
handle: Mutex::new(image::Handle::from_pixels(1, 1, vec![0, 0, 0, 0])),