oxivgl 0.1.2

Safe no_std Rust bindings for LVGL — embedded GUI on ESP32 and host SDL2
Documentation 
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#![cfg_attr(target_arch = "xtensa", no_std, no_main)]
#![cfg_attr(
    target_arch = "xtensa",
    feature(impl_trait_in_assoc_type, type_alias_impl_trait)
)]
// SPDX-License-Identifier: MIT OR Apache-2.0
//! Widget Textarea 4 — Cursor styles
//!
//! Three one-line textareas, each with a unique cursor style:
//! simple red, underline blue, and block orange/yellow gradient.

use oxivgl::{
    enums::ObjState,
    style::{palette_main, BorderSide, GradDir, Palette, Style, StyleBuilder},
    view::{NavAction, View},
    widgets::{Obj, Align, Part, Textarea, WidgetError},
};

#[derive(Default)]
struct WidgetTextarea4 {
    _ta1: Option<Textarea<'static>>,
    _ta2: Option<Textarea<'static>>,
    _ta3: Option<Textarea<'static>>,
    _style_simple: Option<Style>,
    _style_underline: Option<Style>,
    _style_block: Option<Style>,
}

impl View for WidgetTextarea4 {
    fn create(&mut self, container: &Obj<'static>) -> Result<(), WidgetError> {

        // Thin left bar cursor (simple) — red border
        let style_simple = {
            let mut sb = StyleBuilder::new();
            sb.border_color(palette_main(Palette::Red));
            sb.build()
        };

        // Underline cursor — blue, bottom border only
        let style_underline = {
            let mut sb = StyleBuilder::new();
            sb.bg_opa(0)
                .border_color(palette_main(Palette::Blue))
                .border_side(BorderSide::BOTTOM)
                .pad_left(1)
                .pad_right(1)
                .border_width(3);
            sb.build()
        };

        // Full block cursor — orange/yellow gradient
        let style_block = {
            let mut sb = StyleBuilder::new();
            sb.bg_opa(255)
                .bg_color(palette_main(Palette::Orange))
                .bg_grad_color(palette_main(Palette::Yellow))
                .bg_grad_dir(GradDir::Ver)
                .border_color(palette_main(Palette::Red))
                .border_side(BorderSide::FULL)
                .border_width(1)
                .radius(4)
                .text_color_hex(0xFFFFFF)
                .pad_all(1);
            sb.build()
        };

        let cursor_focused = Part::Cursor | ObjState::FOCUSED;

        let ta1 = Textarea::new(container)?;
        ta1.set_text("This is a simple red cursor");
        ta1.width(280).align(Align::TopMid, 0, 10);
        ta1.set_one_line(true);
        ta1.add_state(ObjState::FOCUSED);
        ta1.add_style(&style_simple, cursor_focused);
        ta1.set_cursor_pos(0);

        let ta2 = Textarea::new(container)?;
        ta2.set_text("This is an underline blue cursor");
        ta2.width(280).align(Align::TopMid, 0, 110);
        ta2.set_one_line(true);
        ta2.add_state(ObjState::FOCUSED);
        ta2.add_style(&style_underline, cursor_focused);
        ta2.set_cursor_pos(0);

        let ta3 = Textarea::new(container)?;
        ta3.set_text("This is a complex block cursor");
        ta3.width(280).align(Align::TopMid, 0, 60);
        ta3.set_one_line(true);
        ta3.add_state(ObjState::FOCUSED);
        ta3.add_style(&style_block, cursor_focused);
        ta3.set_cursor_pos(0);

                self._ta1 = Some(ta1);
        self._ta2 = Some(ta2);
        self._ta3 = Some(ta3);
        self._style_simple = Some(style_simple);
        self._style_underline = Some(style_underline);
        self._style_block = Some(style_block);
        Ok(())
    }

    fn update(&mut self) -> Result<NavAction, WidgetError> {
        Ok(NavAction::None)
    }
}

oxivgl_examples_common::example_main!(WidgetTextarea4::default());