Add get_text interface/trait for Label and Textarea widgets

lvgl/src/widgets/label.rs

@@ -1,5 +1,6 @@
 use crate::widgets::Label;
 use crate::{LabelLongMode, NativeObject};
+use cstr_core::CStr;
 
 #[cfg(feature = "alloc")]
 mod alloc_imp {
@@ -41,4 +42,10 @@ impl Label<'_> {
     pub fn get_long_mode(&self) -> u8 {
         unsafe { lvgl_sys::lv_label_get_long_mode(self.raw().as_ref()) }
     }
+
+    pub fn get_text(&self) -> &'static str {
+        let char_ptr = unsafe { lvgl_sys::lv_label_get_text(self.raw().as_ref()) };
+        let c_str = unsafe { CStr::from_ptr(char_ptr) };
+        c_str.to_str().unwrap_or_default()
+    }
 }

lvgl/src/widgets/mod.rs

@@ -12,6 +12,7 @@ mod label;
 mod meter;
 mod slider;
 mod table;
+mod textarea;
 
 include!(concat!(env!("OUT_DIR"), "/generated.rs"));
 
@@ -23,3 +24,4 @@ pub use label::*;
 pub use meter::*;
 pub use slider::*;
 pub use table::*;
+pub use textarea::*;

lvgl/src/widgets/textarea.rs

@@ -0,0 +1,29 @@
+use crate::widgets::Textarea;
+use crate::NativeObject;
+use cstr_core::CStr;
+
+#[cfg(feature = "alloc")]
+mod alloc_imp {
+    use crate::widgets::Textarea;
+    //use crate::LvError;
+    use cstr_core::CString;
+    //use core::convert::TryFrom;
+
+    impl<S: AsRef<str>> From<S> for Textarea<'_> {
+        fn from(text: S) -> Self {
+            // text.try_into().unwrap()
+            let text_cstr = CString::new(text.as_ref()).unwrap();
+            let mut ta = Textarea::new().unwrap();
+            ta.set_text(text_cstr.as_c_str()).unwrap();
+            ta
+        }
+    }
+}
+
+impl Textarea<'_> {
+    pub fn get_text(&self) -> &'static str {
+        let char_ptr = unsafe { lvgl_sys::lv_textarea_get_text(self.raw().as_ref()) };
+        let c_str = unsafe { CStr::from_ptr(char_ptr) };
+        c_str.to_str().unwrap_or_default()
+    }
+}