runmat-plot 0.4.0

//! Event handling and user interaction for interactive plots
//!
//! Manages mouse, keyboard, and touch input for plot navigation
//! and data interaction.

use glam::Vec2;

/// Keyboard modifier keys captured alongside pointer events.
#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
pub struct Modifiers {
    pub shift: bool,
    pub ctrl: bool,
    pub alt: bool,
    pub meta: bool,
}

/// Event types for plot interaction
#[derive(Debug, Clone)]
pub enum PlotEvent {
    MousePress {
        position: Vec2,
        button: MouseButton,
        modifiers: Modifiers,
    },
    MouseRelease {
        position: Vec2,
        button: MouseButton,
        modifiers: Modifiers,
    },
    MouseMove {
        position: Vec2,
        delta: Vec2,
        modifiers: Modifiers,
    },
    /// Mouse wheel / trackpad scroll.
    ///
    /// `position` is the pointer location in the same coordinate space as other mouse events.
    MouseWheel {
        position: Vec2,
        delta: Vec2,
        modifiers: Modifiers,
    },
    KeyPress {
        key: KeyCode,
    },
    KeyRelease {
        key: KeyCode,
    },
    Resize {
        width: u32,
        height: u32,
    },
}

/// Mouse button enumeration
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum MouseButton {
    Left,
    Right,
    Middle,
}

/// Key code enumeration (subset for now)
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum KeyCode {
    Escape,
    Space,
    Enter,
    Tab,
    Backspace,
    Delete,
    Home,
    End,
    PageUp,
    PageDown,
    ArrowUp,
    ArrowDown,
    ArrowLeft,
    ArrowRight,
    // Add more as needed
}

/// Event handler trait for plot interaction
pub trait EventHandler {
    fn handle_event(&mut self, event: PlotEvent) -> bool;
}