druid.rs

use druid::piet::{FontBuilder, Text, TextLayout, TextLayoutBuilder};
use druid::theme;
use druid::{widget::prelude::*, WindowDesc, AppLauncher};

struct TextTest;

impl Widget<()> for TextTest {
    fn event(&mut self, _: &mut EventCtx, _: &Event, _: &mut (), _: &Env) {}
    fn lifecycle(&mut self, _: &mut LifeCycleCtx, _: &LifeCycle, _: &(), _: &Env) {}
    fn update(&mut self, _: &mut UpdateCtx, _: &(), _: &(), _: &Env) {}
    fn layout(&mut self, _: &mut LayoutCtx, bc: &BoxConstraints, _: &(), _: &Env) -> Size {
        bc.max()
    }
    fn paint(&mut self, ctx: &mut PaintCtx, _: &(), env: &Env) {
        let font_name = env.get(theme::FONT_NAME);
        let font_size = env.get(theme::TEXT_SIZE_NORMAL);
        let font = ctx
            .text()
            .new_font_by_name(font_name, font_size)
            .build()
            .unwrap();
        let text = ctx
            .text()
            .new_text_layout(&font, "Test", None)
            .build()
            .unwrap();
        let pos = text.hit_test_text_position(1).unwrap().point;
        panic!("{:#?}", pos);
    }
}

fn main() {
    let main_window = WindowDesc::new(||TextTest)
        .title("hello")
        .window_size((400.0, 400.0));

        AppLauncher::with_window(main_window)
            .launch(())
            .unwrap();
}