bevy_panorbit_camera 0.9.2

A basic pan and orbit camera in Bevy
Documentation 
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use bevy::prelude::{DetectChangesMut, Query, ResMut, Resource};

/// A resource that tracks whether egui wants focus on the current and previous frames.
///
/// The reason the previous frame's value is saved is because when you click inside an
/// egui window, Context::wants_pointer_input() still returns false once before returning
/// true. If the camera stops taking input only when it returns false, there's one frame
/// where both egui and the camera are using the input events, which is not desirable.
///
/// This is re-exported in case it's useful. I recommend only using input events if both
/// `prev` and `curr` are false.
#[derive(Resource, PartialEq, Eq, Default)]
pub struct EguiWantsFocus {
    /// Whether egui wanted focus on the previous frame
    pub prev: bool,
    /// Whether egui wants focus on the current frame
    pub curr: bool,
}

pub fn check_egui_wants_focus(
    mut contexts: Query<&mut bevy_egui::EguiContext>,
    mut wants_focus: ResMut<EguiWantsFocus>,
) {
    let ctx = contexts.iter_mut().next();
    let new_wants_focus = if let Some(mut ctx) = ctx {
        let ctx = ctx.get_mut();
        ctx.wants_pointer_input() || ctx.wants_keyboard_input()
    } else {
        false
    };
    let new_res = EguiWantsFocus {
        prev: wants_focus.curr,
        curr: new_wants_focus,
    };
    wants_focus.set_if_neq(new_res);
}