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use {
Color,
Colorable,
Dimensions,
Borderable,
Point,
Positionable,
Rect,
Scalar,
Sizeable,
Widget,
};
use widget;
use widget::triangles::Triangle;
#[derive(Copy, Clone, Debug, WidgetCommon_)]
pub struct BorderedRectangle {
#[conrod(common_builder)]
pub common: widget::CommonBuilder,
pub style: Style,
}
widget_ids! {
struct Ids {
border,
rectangle,
}
}
#[derive(Copy, Clone, Debug, Default, PartialEq, WidgetStyle_)]
pub struct Style {
#[conrod(default = "theme.shape_color")]
pub color: Option<Color>,
#[conrod(default = "theme.border_width")]
pub border: Option<Scalar>,
#[conrod(default = "theme.border_color")]
pub border_color: Option<Color>,
}
pub struct State {
ids: Ids,
}
impl BorderedRectangle {
pub fn new(dim: Dimensions) -> Self {
BorderedRectangle {
common: widget::CommonBuilder::default(),
style: Style::default(),
}.wh(dim)
}
builder_method!(pub with_style { style = Style });
}
impl Widget for BorderedRectangle {
type State = State;
type Style = Style;
type Event = ();
fn init_state(&self, id_gen: widget::id::Generator) -> Self::State {
State {
ids: Ids::new(id_gen),
}
}
fn style(&self) -> Self::Style {
self.style.clone()
}
fn update(self, args: widget::UpdateArgs<Self>) -> Self::Event {
let widget::UpdateArgs { id, state, style, rect, ui, .. } = args;
let border = style.border(&ui.theme);
if let Some(triangles) = border_triangles(rect, border) {
let border_color = style.border_color(&ui.theme);
widget::Triangles::single_color(border_color, triangles.iter().cloned())
.with_bounding_rect(rect)
.parent(id)
.graphics_for(id)
.set(state.ids.border, ui);
}
let color = style.color(&ui.theme);
widget::Rectangle::fill(rect.pad(border).dim())
.xy(rect.xy())
.color(color)
.parent(id)
.graphics_for(id)
.set(state.ids.rectangle, ui);
}
}
impl Colorable for BorderedRectangle {
builder_method!(color { style.color = Some(Color) });
}
impl Borderable for BorderedRectangle {
builder_methods!{
border { style.border = Some(Scalar) }
border_color { style.border_color = Some(Color) }
}
}
pub fn border_triangles(rect: Rect, border: Scalar) -> Option<[Triangle<Point>; 8]> {
if border <= 0.0 {
return None;
}
let (l, r, b, t) = rect.l_r_b_t();
let l_pad = l + border;
let r_pad = r - border;
let b_pad = b + border;
let t_pad = t - border;
let r1 = [[l, t], [r_pad, t], [r_pad, t_pad], [l, t_pad]];
let r2 = [[r_pad, t], [r, t], [r, b_pad], [r_pad, b_pad]];
let r3 = [[l_pad, b_pad], [r, b_pad], [r, b], [l_pad, b]];
let r4 = [[l, t_pad], [l_pad, t_pad], [l_pad, b], [l, b]];
let (r1a, r1b) = widget::triangles::from_quad(r1);
let (r2a, r2b) = widget::triangles::from_quad(r2);
let (r3a, r3b) = widget::triangles::from_quad(r3);
let (r4a, r4b) = widget::triangles::from_quad(r4);
Some([r1a, r1b, r2a, r2b, r3a, r3b, r4a, r4b])
}