Implement simple bar widget

lvgl/src/lib.rs

@@ -2,11 +2,12 @@
 
 extern crate alloc;
 
-mod global;
 mod display;
+mod global;
+#[macro_use]
 mod support;
-mod widgets;
+pub mod widgets;
 
-pub use global::{UI, LvError};
 pub use display::DisplayDriver;
+pub use global::{LvError, UI};
 pub use support::*;

lvgl/src/support.rs

@@ -111,17 +111,17 @@ impl Object for ObjectX {
 macro_rules! define_object {
     ($item:ident) => {
         pub struct $item {
-            core: ObjectX,
+            core: $crate::support::ObjectX,
         }
 
-        impl NativeObject for $item {
+        impl $crate::support::NativeObject for $item {
             fn raw(&self) -> ptr::NonNull<lvgl_sys::lv_obj_t> {
                 self.core.raw()
             }
         }
 
-        impl Object for $item {
-            fn set_style(&mut self, style: Style) {
+        impl $crate::support::Object for $item {
+            fn set_style(&mut self, style: $crate::support::Style) {
                 unsafe {
                     let boxed = Box::new(style.raw);
                     lvgl_sys::lv_obj_set_style(self.raw().as_mut(), Box::into_raw(boxed));
@@ -200,7 +200,7 @@ pub enum Themes {
 }
 
 pub struct Style {
-    raw: lvgl_sys::lv_style_t,
+    pub(crate) raw: lvgl_sys::lv_style_t,
 }
 
 impl Style {

lvgl/src/widgets/bar.rs

@@ -0,0 +1,35 @@
+// use crate::define_object;
+use crate::support::{NativeObject, ObjectX};
+use alloc::boxed::Box;
+use core::ptr;
+use lvgl_sys;
+
+define_object!(Bar);
+
+impl Bar {
+    pub fn new<C>(parent: &mut C) -> Self
+    where
+        C: NativeObject,
+    {
+        let raw = unsafe {
+            let ptr = lvgl_sys::lv_bar_create(parent.raw().as_mut(), ptr::null_mut());
+            ptr::NonNull::new_unchecked(ptr)
+        };
+        let core = ObjectX::from_raw(raw);
+        Self { core }
+    }
+
+    /// Set minimum and the maximum values of the bar
+    pub fn set_range(&mut self, min: i16, max: i16) {
+        unsafe {
+            lvgl_sys::lv_bar_set_range(self.core.raw().as_mut(), min, max);
+        }
+    }
+
+    /// Set the value of the bar
+    pub fn set_value(&mut self, value: i16) {
+        unsafe {
+            lvgl_sys::lv_bar_set_value(self.core.raw().as_mut(), value, 0);
+        }
+    }
+}

lvgl/src/widgets/mod.rs

@@ -0,0 +1,3 @@
+mod bar;
+
+pub use self::bar::Bar;