druid 0.5.0

Data-oriented Rust UI design toolkit.
Documentation 
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// Copyright 2020 The xi-editor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! This example shows how to draw an png image.
//!
//! Requires the non-default "image" feature to be enabled:
//! `cargo run --example image --features "images"`
//!

#[cfg(not(feature = "image"))]
fn main() {
    eprintln!("This examples requires the \"image\" feature to be enabled:");
    eprintln!("cargo run --example image --features \"image\"");
}

#[cfg(feature = "image")]
fn main() {
    use druid::{
        widget::{FillStrat, Flex, Image, ImageData, WidgetExt},
        AppLauncher, Color, Widget, WindowDesc,
    };

    fn ui_builder() -> impl Widget<u32> {
        let png_data = ImageData::from_file("examples/PicWithAlpha.png").unwrap();

        let mut col = Flex::column();

        col.add_flex_child(
            Image::new(png_data.clone())
                .border(Color::WHITE, 1.0)
                .fix_width(100.0)
                .center(),
            1.0,
        );

        /*
        // If you want to change the fill stratagy you can but you need the widget to be mut
        let mut otherimage = Image::new(png_data);
        otherimage.set_fill(FillStrat::FitWidth);
        */

        let otherimage = Image::new(png_data)
            .fill_mode(FillStrat::FitWidth)
            .border(Color::WHITE, 1.0);
        col.add_flex_child(otherimage, 1.0);
        col
    };

    let main_window = WindowDesc::new(ui_builder);
    let data = 0_u32;
    AppLauncher::with_window(main_window)
        .use_simple_logger()
        .launch(data)
        .expect("launch failed");
}