use bevy::reflect::{FromReflect, Reflect};

/// Controls how the cursor interacts on a given node
#[derive(Debug, Reflect, FromReflect, Copy, Clone, PartialEq, Eq)]
pub enum PointerEvents {
    /// Allow all pointer events on this node and its children
    All,
    /// Allow pointer events on this node but not on its children
    SelfOnly,
    /// Allow pointer events on this node's children but not on itself
    ChildrenOnly,
    /// Disallow all pointer events on this node and its children
    None,
}

impl Default for PointerEvents {
    fn default() -> Self {
        Self::All
    }
}

#[derive(Default, Debug, Copy, Clone, PartialEq)]
pub struct CursorEvent {
    pub pressed: bool,
    pub just_pressed: bool,
    pub just_released: bool,
    pub position: (f32, f32),
}

/// An event created on scroll
#[derive(Default, Debug, Copy, Clone, PartialEq)]
pub struct ScrollEvent {
    /// The amount scrolled
    pub delta: ScrollUnit,
}

#[derive(Debug, Copy, Clone, PartialEq)]
pub enum ScrollUnit {
    /// A scroll unit that goes by a "line of text"
    Line { x: f32, y: f32 },
    /// A scroll unit that goes by individual pixels
    Pixel { x: f32, y: f32 },
}

impl Default for ScrollUnit {
    fn default() -> Self {
        ScrollUnit::Pixel { x: 0.0, y: 0.0 }
    }
}