Support more styling options

examples/bar.rs

@@ -3,8 +3,8 @@ use embedded_graphics::prelude::*;
 use embedded_graphics_simulator::{
     OutputSettingsBuilder, SimulatorDisplay, SimulatorEvent, Window,
 };
-use lvgl::widgets::{Bar, BarComponent, Label};
+use lvgl::widgets::{Bar, BarComponent, Label, LabelAlign};
-use lvgl::{self, Align, Animation, Color, DisplayDriver, Event, Object, Style, UI};
+use lvgl::{self, Align, Animation, Border, Color, DisplayDriver, Event, Object, Style, UI};
 use lvgl_sys;
 use std::sync::{mpsc, Arc, Mutex};
 use std::thread::sleep;
@@ -29,15 +29,15 @@ fn main() -> Result<(), String> {
     let mut screen = ui.scr_act();
 
     let mut screen_style = Style::new();
-    screen_style.set_body_main_color(Color::from_rgb((0, 0, 0)));
+    screen_style.set_body_main_color(Color::from_rgb((255, 255, 255)));
-    screen_style.set_body_grad_color(Color::from_rgb((0, 0, 0)));
+    screen_style.set_body_grad_color(Color::from_rgb((255, 255, 255)));
     screen_style.set_body_radius(0);
     screen.set_style(screen_style);
 
     // Create the bar object
     let mut bar = Bar::new(&mut screen);
     bar.set_size(175, 50);
-    bar.set_align(&mut screen, Align::Center, 0, 0);
+    bar.set_align(&mut screen, Align::Center, 0, 20);
     bar.set_range(0, 100);
     bar.set_value(0, Animation::OFF);
 
@@ -52,21 +52,17 @@ fn main() -> Result<(), String> {
     bg_style.set_body_grad_color(Color::from_rgb((255, 255, 255)));
     bg_style.set_body_main_color(Color::from_rgb((255, 255, 255)));
     bg_style.set_body_radius(0);
+    bg_style.set_body_border_part(Border::TOP);
+    bg_style.set_body_border_width(1);
     bar.set_bar_style(BarComponent::Background, bg_style);
 
     let mut loading_lbl = Label::new(&mut screen);
     loading_lbl.set_text("Loading...");
     loading_lbl.set_align(&mut bar, Align::OutTopMid, 0, -10);
-
+    loading_lbl.set_label_align(LabelAlign::Center);
-    loading_lbl.on_event(|mut this, event| {
-        this.set_text("Loaded!");
-        if let lvgl::Event::Clicked = event {
-            println!("Loaded!");
-        }
-    });
 
     let mut loading_style = Style::new();
-    loading_style.set_text_color(Color::from_rgb((255, 255, 255)));
+    loading_style.set_text_color(Color::from_rgb((0, 0, 0)));
     loading_lbl.set_style(loading_style);
 
     let threaded_ui = Arc::new(Mutex::new(ui));

lvgl/Cargo.toml

@@ -15,3 +15,4 @@ lvgl-sys = { path = "../lvgl-sys", version = "0.2.0" }
 cty = "0.2.1"
 embedded-graphics = "0.6.2"
 cstr_core = { version = "0.2.0", default-features = false, features = ["alloc"] }
+bitflags = "1.2.1"

lvgl/src/lib.rs

@@ -1,6 +1,8 @@
 #![no_std]
 
 extern crate alloc;
+#[macro_use]
+extern crate bitflags;
 
 mod display;
 mod global;

lvgl/src/support.rs

@@ -216,6 +216,17 @@ pub enum Themes {
     Pretty,
 }
 
+bitflags! {
+    pub struct Border: u32 {
+        const NONE   = lvgl_sys::LV_BORDER_NONE;
+        const BOTTOM = lvgl_sys::LV_BORDER_BOTTOM;
+        const TOP    = lvgl_sys::LV_BORDER_TOP;
+        const LEFT   = lvgl_sys::LV_BORDER_LEFT;
+        const RIGHT  = lvgl_sys::LV_BORDER_RIGHT;
+        const FULL   = lvgl_sys::LV_BORDER_FULL;
+    }
+}
+
 pub struct Style {
     pub(crate) raw: lvgl_sys::lv_style_t,
 }
@@ -230,7 +241,7 @@ impl Style {
         Self { raw }
     }
 
-    /// Object's main background color.
+    /// Object's main background color
     pub fn set_body_main_color(&mut self, color: Color) {
         self.raw.body.main_color = color.raw;
     }
@@ -240,25 +251,60 @@ impl Style {
         self.raw.body.grad_color = color.raw;
     }
 
-    /// Text color.
+    /// Body radius for rounded corners
-    pub fn set_text_color(&mut self, color: Color) {
-        self.raw.text.color = color.raw;
-    }
-
-    /// Font used for displaying the text.
-    pub fn set_text_font(&mut self, font: &lvgl_sys::lv_font_t) {
-        self.raw.text.font = font;
-    }
-
-    /// Body radius for rounded corners.
     pub fn set_body_radius(&mut self, radius: i16) {
         self.raw.body.radius = radius;
     }
 
-    /// Border color.
+    /// Border color
     pub fn set_body_border_color(&mut self, color: Color) {
         self.raw.body.border.color = color.raw;
     }
+
+    /// Border opacity
+    pub fn set_body_border_opa(&mut self, opa: u8) {
+        self.raw.body.border.opa = opa;
+    }
+
+    /// Border width
+    pub fn set_body_border_width(&mut self, width: i16) {
+        self.raw.body.border.width = width;
+    }
+
+    /// Which borders to draw
+    pub fn set_body_border_part(&mut self, part: Border) {
+        self.raw.body.border.part = part.bits as u8;
+    }
+
+    /// Text color
+    pub fn set_text_color(&mut self, color: Color) {
+        self.raw.text.color = color.raw;
+    }
+
+    /// Font used for displaying the text
+    pub fn set_text_font(&mut self, font: &lvgl_sys::lv_font_t) {
+        self.raw.text.font = font;
+    }
+
+    /// Space between letters
+    pub fn set_text_letter_space(&mut self, space: i16) {
+        self.raw.text.letter_space = space;
+    }
+
+    /// Space between lines (vertical)
+    pub fn set_text_line_space(&mut self, space: i16) {
+        self.raw.text.line_space = space;
+    }
+
+    /// Text opacity
+    pub fn set_text_opa(&mut self, opa: u8) {
+        self.raw.text.opa = opa;
+    }
+
+    /// Text selection background color
+    pub fn set_text_sel_color(&mut self, color: Color) {
+        self.raw.text.sel_color = color.raw;
+    }
 }
 
 impl Clone for Style {