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feat(segmented_button): paginate tabs when width is too narrow

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Michael Aaron Murphy 2024-01-23 14:31:37 +01:00 • committed by Michael Murphy
parent 05f8ffeef1
commit ca92049ab6
3 changed files with 469 additions and 119 deletions
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45
src/widget/segmented_button/horizontal.rs
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@ -44,18 +44,38 @@ where
}
#[allow(clippy::cast_precision_loss)]
fn variant_button_bounds(&self, mut bounds: Rectangle, nth: usize) -> Rectangle {
let num = self.model.items.len();
if num != 0 {
let spacing = f32::from(self.spacing);
bounds.width = ((num as f32).mul_add(-spacing, bounds.width) + spacing) / num as f32;
fn variant_button_bounds(
&self,
state: &LocalState,
mut bounds: Rectangle,
nth: usize,
) -> Option<Rectangle> {
let num = state.buttons_visible;
if nth != 0 {
bounds.x += (nth as f32).mul_add(bounds.width, nth as f32 * spacing);
// Do not display tabs that are currently hidden due to width constraints.
if state.collapsed && nth < state.buttons_offset {
return None;
}
if num != 0 {
let offset_width;
(bounds.x, offset_width) = if state.collapsed {
(bounds.x + 16.0, 32.0)
} else {
(bounds.x, 0.0)
};
let spacing = f32::from(self.spacing);
bounds.width = ((num as f32).mul_add(-spacing, bounds.width - offset_width) + spacing)
/ num as f32;
if nth != state.buttons_offset {
let pos = (nth - state.buttons_offset) as f32;
bounds.x += pos.mul_add(bounds.width, pos * spacing);
}
}
bounds
Some(bounds)
}
#[allow(clippy::cast_precision_loss)]
@ -81,6 +101,15 @@ where
.height(Length::Fixed(height))
.resolve(Size::new(width, height));
let actual_width = size.width as usize;
let minimum_width = self.minimum_button_width as usize * self.model.items.len();
state.buttons_visible = num;
state.collapsed = actual_width < minimum_width;
if state.collapsed {
state.buttons_visible = (actual_width / self.minimum_button_width as usize).min(num);
}
layout::Node::new(size)
}
}