anathema_default_widgets/stacks/
row.rs

1use std::ops::ControlFlow;
2
3use anathema_geometry::Size;
4use anathema_value_resolver::AttributeStorage;
5use anathema_widgets::error::Result;
6use anathema_widgets::layout::{Constraints, LayoutCtx, PositionCtx};
7use anathema_widgets::{LayoutChildren, PositionChildren, Widget, WidgetId};
8
9use crate::layout::Axis;
10use crate::stacks::Stack;
11
12pub struct Row(Stack);
13
14impl Default for Row {
15    fn default() -> Self {
16        Self(Stack(Axis::Horizontal))
17    }
18}
19
20impl Widget for Row {
21    fn layout<'bp>(
22        &mut self,
23        children: LayoutChildren<'_, 'bp>,
24        constraints: Constraints,
25        id: WidgetId,
26        ctx: &mut LayoutCtx<'_, 'bp>,
27    ) -> Result<Size> {
28        self.0.layout(children, constraints, id, ctx)
29    }
30
31    fn position<'bp>(
32        &mut self,
33        mut children: PositionChildren<'_, 'bp>,
34        _: WidgetId,
35        attribute_storage: &AttributeStorage<'bp>,
36        mut ctx: PositionCtx,
37    ) {
38        let y_offset = (ctx.inner_size.height / 2) as i32;
39
40        _ = children.each(|child, children| {
41            let size = child.size();
42            let child_height = size.height as i32;
43            let y = y_offset - child_height / 2;
44
45            let mut pos = ctx.pos;
46            pos.y += y;
47            child.position(children, pos, attribute_storage, ctx.viewport);
48            ctx.pos.x += size.width as i32;
49            ControlFlow::Continue(())
50        });
51    }
52}
53
54#[cfg(test)]
55mod test {
56
57    use crate::testing::TestRunner;
58
59    #[test]
60    fn basic_row() {
61        let tpl = "
62            row
63                text 'a'
64                border
65                    text 'b'
66        ";
67
68        let expected = "
69            ╔════╗
70            ║ ┌─┐║
71            ║a│b│║
72            ║ └─┘║
73            ╚════╝
74        ";
75
76        TestRunner::new(tpl, (4, 3)).instance().render_assert(expected);
77    }
78}
anathema_default_widgets/stacks/row.rs

anathema_default_widgets/stacks/
row.rs
