zaplib_widget 0.0.1

use zaplib::*;

#[derive(Default, Clone)]
pub struct ButtonLogic {}

#[derive(Clone, PartialEq)]
pub enum ButtonLogicEvent {
    Over,
    Default,
    Down,
}

#[derive(Clone, PartialEq)]
pub enum ButtonEvent {
    None,
    Clicked,
    Down,
    Up,
}

impl ButtonLogic {
    pub fn handle_button_logic<F>(&mut self, cx: &mut Cx, event: &mut Event, area: Area, mut cb: F) -> ButtonEvent
    where
        F: FnMut(&mut Cx, ButtonLogicEvent, Area),
    {
        match event.hits(cx, area, HitOpt::default()) {
            Event::FingerDown(_fe) => {
                cb(cx, ButtonLogicEvent::Down, area);
                return ButtonEvent::Down;
            }
            Event::FingerHover(fe) => {
                cx.set_hover_mouse_cursor(MouseCursor::Hand);
                match fe.hover_state {
                    HoverState::In => {
                        if fe.any_down {
                            cb(cx, ButtonLogicEvent::Down, area);
                        } else {
                            cb(cx, ButtonLogicEvent::Over, area);
                        }
                    }
                    HoverState::Out => cb(cx, ButtonLogicEvent::Default, area),
                    _ => (),
                }
            }
            Event::FingerUp(fe) => {
                if fe.is_over {
                    if fe.input_type.has_hovers() {
                        cb(cx, ButtonLogicEvent::Over, area)
                    } else {
                        cb(cx, ButtonLogicEvent::Default, area)
                    }
                    return ButtonEvent::Clicked;
                } else {
                    cb(cx, ButtonLogicEvent::Default, area);
                    return ButtonEvent::Up;
                }
            }
            _ => (),
        };
        ButtonEvent::None
    }
}