nappgui 0.1.0

Rust bindings to NAppGUI
Documentation 
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use nappgui_sys::{
    slider_OnMoved, slider_create, slider_get_value, slider_steps, slider_tooltip, slider_value,
    slider_vertical,
};

use crate::util::macros::callback;

/// Sliders are normally used to edit continuous and bounded numerical values.
pub struct Slider {
    pub(crate) inner: *mut nappgui_sys::Slider,
}

impl Slider {
    pub(crate) fn new(ptr: *mut nappgui_sys::Slider) -> Self {
        if ptr.is_null() {
            panic!("ptr is null");
        }
        Self { inner: ptr }
    }

    /// Create a new slider control.
    pub fn create() -> Self {
        let updown = unsafe { slider_create() };
        Self::new(updown)
    }

    /// Create a new vertical slider.
    pub fn create_vertical() -> Self {
        let updown = unsafe { slider_vertical() };
        Self::new(updown)
    }

    callback! {
        /// Set an event handler for slider movement.
        pub on_moved(Slider) => slider_OnMoved;
    }

    /// Set a tooltip for the slider. It is a small explanatory text that will appear when the mouse is over the control.
    pub fn tooltip(&self, text: &str) {
        let text = std::ffi::CString::new(text).unwrap();
        unsafe {
            slider_tooltip(self.inner, text.as_ptr());
        }
    }

    /// Changes the slider from continuous range to discrete intervals.
    pub fn steps(&self, steps: u32) {
        unsafe {
            slider_steps(self.inner, steps);
        }
    }

    /// Set the slider position.
    pub fn value(&self, value: f32) {
        unsafe {
            slider_value(self.inner, value);
        }
    }

    /// Get the slider position.
    pub fn get_value(&self) -> f32 {
        unsafe { slider_get_value(self.inner) }
    }
}