imgui-rs: Rust bindings for ImGui

Still fairly experimental!

Minimum Rust version: 1.33

Wrapped Dear ImGui version: 1.71

ui.window(im_str!("Hello world"))
    .size([300.0, 100.0], Condition::FirstUseEver)
    .build(|| {
        ui.text(im_str!("Hello world!"));
        ui.text(im_str!("こんにちは世界！"));
        ui.text(im_str!("This...is...imgui-rs!"));
        ui.separator();
        let mouse_pos = ui.io().mouse_pos;
        ui.text(im_str!("Mouse Position: ({:.1},{:.1})", mouse_pos[0], mouse_pos[1]));
    })

Currently implemented things

Low-level API (imgui-sys)
Renderer for easy integration with Glium projects (optional)
Parts of high-level API
Not horrible way of defining and passing null-terminated UTF-8 to ImGui. The macro im_str! needs to be used most of the time. For more information and justification for this design, please see issue #7
Parts of imgui_demo.cpp reimplemented in Rust as an API usage example (imgui-examples/examples/test_window_impl.rs)

Important but unimplemented things

Documentation (rustdoc)
Support passing a custom Program to Glium renderer (e.g. from a shader cache, or custom shader)

Core design questions and current choices

Closures VS begin/end pairs (current choice: closures)
Mutable references VS return values (current choice: mutable references)
Passing around Ui<'ui> VS passing around &'ui Ui (current choice: Ui<'ui>)
Splitting the API to smaller pieces VS all draw calls in Ui (current choice: all draw calls in Ui)
Builder pattern for optional arguments VS something else (current choice: builder)
Mutation functions in builders VS self-consuming functions in builders (current choice: self-consuming)

Compiling and running the demos

git clone https://github.com/Gekkio/imgui-rs
cd imgui-rs
git submodule update --init --recursive

Main examples are located in the imgui-examples directory.

# At the reposity root
cd imgui-examples
cargo test

cargo run --example hello_world
cargo run --example test_window
cargo run --example test_window_impl

Examples for the gfx backend are under the imgui-gfx-examples directory.

cd imgui-gfx-examples
cargo test

cargo run --example hello_world
cargo run --example test_window

Note to Windows users: You will need to use the MSVC ABI version of the Rust compiler along with its associated dependencies to build this libary and run the examples.

How to contribute

Change or add something
Run rustfmt to guarantee code style conformance
```
 rustup component add rustfmt
 cargo fmt
```
Open a pull request in Github

License

Licensed under either of

Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Uses ImGui and cimgui.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

aclysma/imgui-rs