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Refactor resize handle code to be amenable to cascading resizes

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This commit is contained in:
Mikayla Maki 2023-07-22 21:48:45 -07:00
parent e0915190d4
commit b4b53eb5f1
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1 changed files with 45 additions and 29 deletions
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74
crates/workspace/src/pane_group.rs
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@ -780,6 +780,11 @@ mod element {
let mut bounding_boxes = self.bounding_boxes.borrow_mut();
bounding_boxes.clear();
let sizes = self
.children
.iter()
.map(|child| child.size())
.collect::<Vec<_>>();
let mut children_iter = self.children.iter_mut().enumerate().peekable();
while let Some((ix, child)) = children_iter.next() {
let child_start = child_origin.clone();
@ -792,8 +797,7 @@ mod element {
Axis::Vertical => child_origin += vec2f(0.0, child.size().y()),
}
if let Some(Some((next_ix, next_child))) = can_resize.then(|| children_iter.peek())
{
if can_resize && children_iter.peek().is_some() {
scene.push_stacking_context(None, None);
let handle_origin = match self.axis {
@ -823,14 +827,7 @@ mod element {
});
let axis = self.axis;
let child_size = child.size();
let next_child_size = next_child.size();
let drag_bounds = visible_bounds.clone();
let flexes = self.flexes.borrow();
let current_flex = flexes[ix];
let next_ix = *next_ix;
let next_flex = flexes[next_ix];
drop(flexes);
enum ResizeHandle {}
let mut mouse_region = MouseRegion::new::<ResizeHandle>(
cx.view_id(),
@ -840,50 +837,69 @@ mod element {
mouse_region = mouse_region
.on_drag(MouseButton::Left, {
let flexes = self.flexes.clone();
let sizes = sizes.clone();
move |drag, workspace: &mut Workspace, cx| {
let min_size = match axis {
Axis::Horizontal => HORIZONTAL_MIN_SIZE,
Axis::Vertical => VERTICAL_MIN_SIZE,
};
// Don't allow resizing to less than the minimum size, if elements are already too small
if min_size - 1. > child_size.along(axis)
|| min_size - 1. > next_child_size.along(axis)
{
if min_size - 1. > sizes[ix].along(axis) {
return;
}
let mut flexes = flexes.borrow_mut();
let mut current_target_size =
(drag.position - child_start).along(axis);
let proposed_current_pixel_change =
current_target_size - child_size.along(axis);
let mut proposed_current_pixel_change =
current_target_size - sizes[ix].along(axis);
let flex_changes = |target_size, target_ix| {
let current_pixel_change = target_size - sizes[ix].along(axis);
let flex_change =
current_pixel_change / drag_bounds.length_along(axis);
let current_target_flex = flexes[target_ix] + flex_change;
let next_target_flex = flexes[target_ix + 1] - flex_change;
(current_target_flex, next_target_flex)
};
if proposed_current_pixel_change < 0. {
current_target_size = f32::max(current_target_size, min_size);
let (current_target_flex, next_target_flex) =
flex_changes(current_target_size, ix);
*flexes.get_mut(ix).unwrap() = current_target_flex;
*flexes.get_mut(ix + 1).unwrap() = next_target_flex;
} else if proposed_current_pixel_change > 0. {
// TODO: cascade this change to other children if current item is at min size
let next_target_size = f32::max(
next_child_size.along(axis) - proposed_current_pixel_change,
let mut next_target_size = f32::max(
sizes[ix + 1].along(axis) - proposed_current_pixel_change,
min_size,
);
current_target_size = f32::min(
current_target_size,
child_size.along(axis) + next_child_size.along(axis)
sizes[ix].along(axis) + sizes[ix + 1].along(axis)
- next_target_size,
);
let (current_target_flex, next_target_flex) =
flex_changes(current_target_size, ix);
// TODO: make this into a loop
*flexes.get_mut(ix).unwrap() = current_target_flex;
*flexes.get_mut(ix + 1).unwrap() = next_target_flex;
// let mut ix_offset = 0;
// while proposed_current_pixel_change > 0.
// && ix + 1 + ix_offset < flexes.len()
// {
// }
}
let current_pixel_change =
current_target_size - child_size.along(axis);
let flex_change =
current_pixel_change / drag_bounds.length_along(axis);
let current_target_flex = current_flex + flex_change;
let next_target_flex = next_flex - flex_change;
let mut borrow = flexes.borrow_mut();
*borrow.get_mut(ix).unwrap() = current_target_flex;
*borrow.get_mut(next_ix).unwrap() = next_target_flex;
workspace.schedule_serialize(cx);
cx.notify();
}