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Introduce visible_bounds operation for Container

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This commit is contained in:
Héctor Ramón Jiménez 2023-07-27 01:02:28 +02:00
parent e29754f32d
commit e2ba7ece83
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GPG key ID: 140CC052C94F138E
16 changed files with 201 additions and 25 deletions
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19
core/src/widget/operation/scrollable.rs
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@ -1,5 +1,6 @@
//! Operate on widgets that can be scrolled.
use crate::widget::{Id, Operation};
use crate::{Rectangle, Vector};
/// The internal state of a widget that can be scrolled.
pub trait Scrollable {
@ -22,12 +23,19 @@ pub fn snap_to<T>(target: Id, offset: RelativeOffset) -> impl Operation<T> {
fn container(
&mut self,
_id: Option<&Id>,
_bounds: Rectangle,
operate_on_children: &mut dyn FnMut(&mut dyn Operation<T>),
) {
operate_on_children(self)
}
fn scrollable(&mut self, state: &mut dyn Scrollable, id: Option<&Id>) {
fn scrollable(
&mut self,
state: &mut dyn Scrollable,
id: Option<&Id>,
_bounds: Rectangle,
_translation: Vector,
) {
if Some(&self.target) == id {
state.snap_to(self.offset);
}
@ -49,12 +57,19 @@ pub fn scroll_to<T>(target: Id, offset: AbsoluteOffset) -> impl Operation<T> {
fn container(
&mut self,
_id: Option<&Id>,
_bounds: Rectangle,
operate_on_children: &mut dyn FnMut(&mut dyn Operation<T>),
) {
operate_on_children(self)
}
fn scrollable(&mut self, state: &mut dyn Scrollable, id: Option<&Id>) {
fn scrollable(
&mut self,
state: &mut dyn Scrollable,
id: Option<&Id>,
_bounds: Rectangle,
_translation: Vector,
) {
if Some(&self.target) == id {
state.scroll_to(self.offset);
}