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https://github.com/mkj-is/PathBuilder
SwiftUI result builder for Path
https://github.com/mkj-is/PathBuilder
dsl functionbuilder path pathbuilder resultbuilder swift5-4 swiftui
Last synced: about 1 month ago
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SwiftUI result builder for Path
- Host: GitHub
- URL: https://github.com/mkj-is/PathBuilder
- Owner: mkj-is
- License: mit
- Created: 2019-09-25T14:59:50.000Z (about 5 years ago)
- Default Branch: main
- Last Pushed: 2023-12-13T15:14:04.000Z (12 months ago)
- Last Synced: 2024-03-14T14:02:13.277Z (9 months ago)
- Topics: dsl, functionbuilder, path, pathbuilder, resultbuilder, swift5-4, swiftui
- Language: Swift
- Homepage:
- Size: 95.7 KB
- Stars: 65
- Watchers: 2
- Forks: 3
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
Awesome Lists containing this project
- awesome-result-builders - PathBuilder - Implementation of function builder for SwiftUI Path. (SwiftUI)
README
# PathBuilder
_Path builder_ is a complete result builder for lifting `Path` into the declarative SwiftUI world. This `@resultBuilder` can be used for elegant and short definition of paths. Missing documentation gaps in SwiftUI are filled in using the old but good CGMutablePath knowledge.
## Motivation
I just wanted to learn to implement result builders. And during playing with animated paths in SwiftUI found a perfect place to experiment.
## Usage
### Examples
With _PathBuilder_ you can write this to draw a triangle:
```swift
Path {
Move(to: CGPoint(x: 50, y: 50))
Line(to: CGPoint(x: 100, y: 100))
Line(to: CGPoint(x: 0, y: 100))
Close()
}
```
Instead of longer version:
```swift
Path { p in
p.move(to: CGPoint(x: 50, y: 50))
p.addLine(to: CGPoint(x: 100, y: 100))
p.addLine(to: CGPoint(x: 0, y: 100))
p.closeSubpath()
}
```
Drawing a Swift logo can be implemented like [this](Documentation/SwiftLogo.swift).
### Path components
There are many basic path components present. You can create a new one by conforming to the `PathComponent` protocol.
#### Elementary components
- *Arc* – Adds an arc of a circle to the path, specified with a radius and angles.
- *Close* – Closes and completes a subpath in a path.
- *Curve* – Adds a cubic Bézier curve to the path, with the specified end point and control points.
- *Oval* – Adds an ellipse that fits inside the specified rectangle.
- *EmptySubpath* – Adds empty subpath, used mainly as a temporary placeholder.
- *Line* – Appends a straight line segment from the current point to the specified point.
- *Lines* – Adds a sequence of connected straight-line segments to the path.
- *Move* – Begins a new subpath at the specified point.
- *QuadCurve* – Adds a quadratic Bézier curve to the path, with the specified end point and control point.
- *Rect* – Adds a set of rectangular subpaths to the path.
- *RelativeArc* – Adds an arc of a circle to the path, specified with a radius and a difference in angle.
- *RoundedRect* – Adds a subpath to the path, in the shape of a rectangle with rounded corners.
- *TangentArc* – Adds an arc of a circle to the path, specified with a radius and two tangent lines.
#### Grouping components
- *Loop* – Appends components to path iterating over supplied sequence and building path for each element.
- *Subpath* – Groups and appends another subpath object to the path and optionally transforms it.
## Requirements
For Swift 5.1 to 5.3 use package version 1.1.1.
Otherwise for version 2.0+ use latest tools:
- Xcode 12.5 or above
- Swift 5.4 or above
- iOS 13, macOS 10.15, watchOS 6.0, tvOS 13.0 or above
## Installation
Using Swift Package Manager in Xcode
or by adding to your Package manifest file.
## Contributing
All contributions are welcome.
Project was created by [Matěj Kašpar Jirásek](https://github.com/mkj-is).
Project is licensed under [MIT license](LICENSE.txt).