166 lines
4.7 KiB
Markdown
166 lines
4.7 KiB
Markdown
Yui - A Declarative UI library for LÖVE
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=======================================
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**Yui** - Yet another User Interface, is a library to create menu-like GUIs
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for the [LÖVE](https://love2d.org) engine.
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## Why is that?
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Because I'm spending so much time tweaking and customizing existing libraries,
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I might as well make my own.
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## Hello, World!
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```lua
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local yui = require 'lib.yui'
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function love.load()
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local w, h = 300, 80
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local x = math.floor((love.graphics.getWidth() - w) / 2)
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local y = math.floor((love.graphics.getHeight() - h) / 2)
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ui = yui.Ui.new {
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x = x, y = y,
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yui.Rows {
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yui.Label {
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w = w, h = h / 2,
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text = "Hello, World!"
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},
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yui.Button {
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text = "Close",
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onHit = function() love.event.quit() end
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}
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}
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}
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end
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function love.update(dt)
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ui:update(dt)
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end
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function love.draw()
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ui:draw()
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end
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```
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## Features
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**Yui** fills the following gaps:
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* Immediate mode UIs tend to clutter LÖVE `update()` code a lot, using a declarative approach - that is:
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describing how the UI should look upfront, and then letting the UI code `update()` and `draw()` itself accordingly,
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makes for a cleaner code.
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* Adapt to different sources of input easily (keyboard, mouse, touch, gamepad).
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* Out of the box internationalization.
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* Out of the box keyboard navigation across widgets.
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* Simple layouts (place widget in columns or rows, or possibly build rows made of several columns - grids).
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* Custom widgets support.
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* Custom theme support.
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* Custom input sources support.
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* Sufficiently compact, straightforward and hackable code.
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**Yui** does have some downsides:
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* The declarative approach makes UIs harder to change drastically from frame to frame.
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* **Yui** tries to ameliorate this, allowing widgets property tweening, it's still less powerful
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compared to an all out immediate UI approach.
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* Features come with a price, **Yui**'s code tries to be small and simple, but there are definitely smaller
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(and less featureful) frameworks out there.
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## Dependencies
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**Yui** depends on:
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* [gear](https://gitea.it/1414codeforge/gear) for general algorithms.
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* [moonspeak](https://gitea.it/1414codeforge/moonspeak) for its localization functionality.
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* ...and any of their dependencies.
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You may either download each of them manually and place them inside a `lib` subdirectory, or use
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[crush](https://gitea.it/1414codeforge/crush) to do the work for you.
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1. Clone this repository.
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```sh
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git clone https://gitea.it/1414codeforge/yui
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```
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2. Move to repository root directory:
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```sh
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cd yui
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```
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3. Resolve dependencies using **crush**.
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```sh
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lua crush.lua
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```
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You should now see a `lib` subdirectory containing the necessary dependencies.
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## Integrating yui in my project using crush
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1. Download the latest [crush.lua](https://gitea.it/1414codeforge/crush/src/branch/master/crush.lua) file and
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place it in your project's root directory.
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2. Create a `.lovedeps` text file in your project's root with the following entry:
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```lua
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{
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yui = "https://gitea.it/1414codeforge/yui",
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-- ...more dependencies, if necessary...
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}
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```
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3. **Yui** can now be downloaded directly by `crush` to the project's `lib` directory:
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```sh
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lua crush.lua
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```
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4. Now `yui` can be `require()`d in your code, like this:
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```lua
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local yui = require 'lib.yui'
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```
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5. Any project depending on yours will now fetch `yui`
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automatically when using `crush`, following the above procedure.
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## Documentation
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...Ouch.
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Documentation is underway, however the source code is (IMHO) sufficiently
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straightforward and disciplined to have a decent overview of the functionality.
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Examples are available at:
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[https://gitea.it/1414codeforge/yui-examples](https://gitea.it/1414codeforge/yui-examples)
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## Acknowledgement
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Portions of this library's widget rendering code are taken from the
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Simple User Interface Toolkit (**SUIT**) for LÖVE by Matthias Richter.
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SUIT's source code is available at: [vrld/SUIT](https://github.com/vrld/SUIT).
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SUIT is licensed under the [MIT license](https://github.com/vrld/suit/blob/master/license.txt).
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Widgets offered by **yui** and basic theme are also mostly taken from SUIT.
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See [ACKNOWLEDGEMENT](README.ACKNOWLEDGEMENT) for full SUIT license
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information and copyright notice.
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## Similar projects
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* [SUIT](https://github.com/vrld/SUIT) an excellent, simple and flexible framework for immediate UIs.
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* [Gspöt](https://notabug.org/pgimeno/Gspot) a stateful GUI lib for LÖVE, has similar aims, but different approach.
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## License
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Zlib, see [LICENSE](LICENSE) for details.
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