carbide_core 0.70.1

An easy-to-use, 100% Rust, extensible 2D GUI library.
Documentation 
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use crate::prelude::*;
use crate::widget::ChildRender;


#[derive(Debug, Clone, Widget)]
pub struct Offset<GS> where GS: GlobalState {
    id: Uuid,
    child: Box<dyn Widget<GS>>,
    position: Point,
    dimension: Dimensions,
    #[state] offset_x: CommonState<f64, GS>,
    #[state] offset_y: CommonState<f64, GS>,
}

impl<GS: GlobalState> WidgetExt<GS> for Offset<GS> {}

impl<S: GlobalState> Layout<S> for Offset<S> {
    fn flexibility(&self) -> u32 {
        self.child.flexibility()
    }

    fn calculate_size(&mut self, requested_size: Dimensions, env: &Environment<S>) -> Dimensions {
        self.dimension = self.child.calculate_size(requested_size, env);
        self.dimension
    }

    fn position_children(&mut self) {
        let positioning = BasicLayouter::Center.position();
        let position = self.position;
        let dimension = self.dimension;

        positioning(position, dimension, &mut self.child);

        let mut child_position: Point = self.child.get_position();

        child_position[0] += self.offset_x.get_latest_value();
        child_position[1] += self.offset_y.get_latest_value();

        self.child.set_position(child_position);

        self.child.position_children();
    }
}

impl<S: GlobalState> CommonWidget<S> for Offset<S> {
    fn get_id(&self) -> Uuid {
        self.id
    }

    fn get_flag(&self) -> Flags {
        Flags::EMPTY
    }

    fn get_children(&self) -> WidgetIter<S> {
        if self.child.get_flag() == Flags::PROXY {
            self.child.get_children()
        } else {
            WidgetIter::single(&self.child)
        }
    }

    fn get_children_mut(&mut self) -> WidgetIterMut<S> {
        if self.child.get_flag() == Flags::PROXY {
            self.child.get_children_mut()
        } else {
            WidgetIterMut::single(&mut self.child)
        }
    }

    fn get_proxied_children(&mut self) -> WidgetIterMut<S> {
        WidgetIterMut::single(&mut self.child)
    }

    fn get_position(&self) -> Point {
        self.position
    }

    fn set_position(&mut self, position: Dimensions) {
        self.position = position;
    }

    fn get_dimension(&self) -> Dimensions {
        self.dimension
    }

    fn set_dimension(&mut self, dimensions: Dimensions) {
        self.dimension = dimensions
    }
}

impl<S: GlobalState> ChildRender for Offset<S> {}


impl<GS: GlobalState> Offset<GS> {
    pub fn new(offset_x: CommonState<f64,GS>, offset_y: CommonState<f64,GS>, child: Box<dyn Widget<GS>>) -> Box<Self<>> {
        Box::new(Offset {
            id: Uuid::new_v4(),
            child,
            position: [0.0, 0.0],
            dimension: [0.0, 0.0],
            offset_x,
            offset_y
        })
    }
}