Trait veloren_voxygen::hud::Position

pub trait Position {
    // Required method
    fn position(self, request: PositionSpecifier) -> Self;
}

Trait which enables you to declare widget position to use later on widget creation. It is implemented for all widgets which are implement Positionable, so you can easily change your code to use this method.

Consider this example:

    let slot1 = slot_maker
        .fabricate(hotbar::Slot::One, [40.0; 2])
        .filled_slot(self.imgs.skillbar_slot)
        .bottom_left_with_margins_on(state.ids.frame, 0.0, 0.0);
    if condition {
        call_slot1(slot1);
    } else {
        call_slot2(slot1);
    }
    let slot2 = slot_maker
        .fabricate(hotbar::Slot::Two, [40.0; 2])
        .filled_slot(self.imgs.skillbar_slot)
        .right_from(state.ids.slot1, slot_offset);
    if condition {
        call_slot1(slot2);
    } else {
        call_slot2(slot2);
    }

Despite being identical, you can’t easily deduplicate code which uses slot1 and slot2 as they are calling methods to position itself. This can be solved if you declare position and use it later like so

let slots = [
    (hotbar::Slot::One, BottomLeftWithMarginsOn(state.ids.frame, 0.0, 0.0)),
    (hotbar::Slot::Two, RightFrom(state.ids.slot1, slot_offset)),
];
for (slot, pos) in slots {
    let slot = slot_maker
        .fabricate(slot, [40.0; 2])
        .filled_slot(self.imgs.skillbar_slot)
        .position(pos);
    if condition {
        call_slot1(slot);
    } else {
        call_slot2(slot);
    }
}

Required Methods

fn position(self, request: PositionSpecifier) -> Self

Object Safety

This trait is not object safe.

Implementors

impl<W: Positionable> Position for W