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Add drag callbacks to mouse regions

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Co-Authored-By: Max Brunsfeld <maxbrunsfeld@gmail.com>
This commit is contained in:
Nathan Sobo 2022-05-26 18:59:38 -06:00
parent bd62a68234
commit 50edcb06dd
2 changed files with 27 additions and 3 deletions
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29
crates/gpui/src/presenter.rs
View file

@ -33,6 +33,7 @@ pub struct Presenter {
last_mouse_moved_event: Option<Event>,
hovered_region_id: Option<MouseRegionId>,
clicked_region: Option<MouseRegion>,
prev_drag_position: Option<Vector2F>,
titlebar_height: f32,
}
@ -57,6 +58,7 @@ impl Presenter {
last_mouse_moved_event: None,
hovered_region_id: None,
clicked_region: None,
prev_drag_position: None,
titlebar_height,
}
}
@ -205,12 +207,14 @@ impl Presenter {
let mut unhovered_region = None;
let mut hovered_region = None;
let mut clicked_region = None;
let mut dragged_region = None;
match event {
Event::LeftMouseDown { position, .. } => {
for region in self.mouse_regions.iter().rev() {
if region.bounds.contains_point(position) {
self.clicked_region = Some(region.clone());
self.prev_drag_position = Some(position);
break;
}
}
@ -220,6 +224,7 @@ impl Presenter {
click_count,
..
} => {
self.prev_drag_position.take();
if let Some(region) = self.clicked_region.take() {
if region.bounds.contains_point(position) {
clicked_region = Some((region, position, click_count));
@ -256,6 +261,16 @@ impl Presenter {
}
}
Event::LeftMouseDragged { position } => {
if let Some((clicked_region, prev_drag_position)) = self
.clicked_region
.as_ref()
.zip(self.prev_drag_position.as_mut())
{
dragged_region =
Some((clicked_region.clone(), position - *prev_drag_position));
*prev_drag_position = position;
}
self.last_mouse_moved_event = Some(Event::MouseMoved {
position,
left_mouse_down: true,
@ -270,7 +285,7 @@ impl Presenter {
if let Some(unhovered_region) = unhovered_region {
if let Some(hover_callback) = unhovered_region.hover {
event_cx.with_current_view(unhovered_region.view_id, |event_cx| {
hover_callback(false, event_cx)
hover_callback(false, event_cx);
})
}
}
@ -278,7 +293,7 @@ impl Presenter {
if let Some(hovered_region) = hovered_region {
if let Some(hover_callback) = hovered_region.hover {
event_cx.with_current_view(hovered_region.view_id, |event_cx| {
hover_callback(true, event_cx)
hover_callback(true, event_cx);
})
}
}
@ -286,7 +301,15 @@ impl Presenter {
if let Some((clicked_region, position, click_count)) = clicked_region {
if let Some(click_callback) = clicked_region.click {
event_cx.with_current_view(clicked_region.view_id, |event_cx| {
click_callback(position, click_count, event_cx)
click_callback(position, click_count, event_cx);
})
}
}
if let Some((dragged_region, delta)) = dragged_region {
if let Some(drag_callback) = dragged_region.drag {
event_cx.with_current_view(dragged_region.view_id, |event_cx| {
drag_callback(delta, event_cx);
})
}
}

1
crates/gpui/src/scene.rs
View file

@ -51,6 +51,7 @@ pub struct MouseRegion {
pub bounds: RectF,
pub hover: Option<Rc<dyn Fn(bool, &mut EventContext)>>,
pub click: Option<Rc<dyn Fn(Vector2F, usize, &mut EventContext)>>,
pub drag: Option<Rc<dyn Fn(Vector2F, &mut EventContext)>>,
}
#[derive(Copy, Clone, Eq, PartialEq)]