Initial commit

.gitignore

@@ -0,0 +1,19 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Go workspace file
+go.work
+go.work.sum
+
+# env file
+.env

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Zervó Zadachin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,3 @@
+# GioUtils
+
+Various utilities for the Gio UI framework.

go.mod

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+module gioutils
+
+go 1.23.5
+
+require gioui.org v0.8.0
+
+require (
+	gioui.org/shader v1.0.8 // indirect
+	github.com/go-text/typesetting v0.2.1 // indirect
+	golang.org/x/exp v0.0.0-20240707233637-46b078467d37 // indirect
+	golang.org/x/exp/shiny v0.0.0-20240707233637-46b078467d37 // indirect
+	golang.org/x/image v0.18.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/text v0.16.0 // indirect
+)

go.sum

@@ -0,0 +1,21 @@
+eliasnaur.com/font v0.0.0-20230308162249-dd43949cb42d h1:ARo7NCVvN2NdhLlJE9xAbKweuI9L6UgfTbYb0YwPacY=
+eliasnaur.com/font v0.0.0-20230308162249-dd43949cb42d/go.mod h1:OYVuxibdk9OSLX8vAqydtRPP87PyTFcT9uH3MlEGBQA=
+gioui.org v0.8.0 h1:QV5p5JvsmSmGiIXVYOKn6d9YDliTfjtLlVf5J+BZ9Pg=
+gioui.org v0.8.0/go.mod h1:vEMmpxMOd/iwJhXvGVIzWEbxMWhnMQ9aByOGQdlQ8rc=
+gioui.org/cpu v0.0.0-20210808092351-bfe733dd3334/go.mod h1:A8M0Cn5o+vY5LTMlnRoK3O5kG+rH0kWfJjeKd9QpBmQ=
+gioui.org/shader v1.0.8 h1:6ks0o/A+b0ne7RzEqRZK5f4Gboz2CfG+mVliciy6+qA=
+gioui.org/shader v1.0.8/go.mod h1:mWdiME581d/kV7/iEhLmUgUK5iZ09XR5XpduXzbePVM=
+github.com/go-text/typesetting v0.2.1 h1:x0jMOGyO3d1qFAPI0j4GSsh7M0Q3Ypjzr4+CEVg82V8=
+github.com/go-text/typesetting v0.2.1/go.mod h1:mTOxEwasOFpAMBjEQDhdWRckoLLeI/+qrQeBCTGEt6M=
+github.com/go-text/typesetting-utils v0.0.0-20241103174707-87a29e9e6066 h1:qCuYC+94v2xrb1PoS4NIDe7DGYtLnU2wWiQe9a1B1c0=
+github.com/go-text/typesetting-utils v0.0.0-20241103174707-87a29e9e6066/go.mod h1:DDxDdQEnB70R8owOx3LVpEFvpMK9eeH1o2r0yZhFI9o=
+golang.org/x/exp v0.0.0-20240707233637-46b078467d37 h1:uLDX+AfeFCct3a2C7uIWBKMJIR3CJMhcgfrUAqjRK6w=
+golang.org/x/exp v0.0.0-20240707233637-46b078467d37/go.mod h1:M4RDyNAINzryxdtnbRXRL/OHtkFuWGRjvuhBJpk2IlY=
+golang.org/x/exp/shiny v0.0.0-20240707233637-46b078467d37 h1:SOSg7+sueresE4IbmmGM60GmlIys+zNX63d6/J4CMtU=
+golang.org/x/exp/shiny v0.0.0-20240707233637-46b078467d37/go.mod h1:3F+MieQB7dRYLTmnncoFbb1crS5lfQoTfDgQy6K4N0o=
+golang.org/x/image v0.18.0 h1:jGzIakQa/ZXI1I0Fxvaa9W7yP25TqT6cHIHn+6CqvSQ=
+golang.org/x/image v0.18.0/go.mod h1:4yyo5vMFQjVjUcVk4jEQcU9MGy/rulF5WvUILseCM2E=
+golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=

internal/constants.go

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+package internal
+
+import "image/color"
+
+var (
+	DefaultBgColor color.NRGBA = color.NRGBA{R: 255, G: 255, B: 255, A: 255}
+)

points/points.go

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+package points
+
+import (
+	"image"
+
+	"gioui.org/layout"
+)
+
+// ContextCenter returns a point representing the center of the provide layout context.
+func ContextCenter(gtx layout.Context) image.Point {
+	return image.Pt(gtx.Constraints.Max.X/2, gtx.Constraints.Max.Y/2)
+}
+
+// ContextCenterSquare returns two points representing the upper left corner (min) and lower right corner (max) of a square around the context center.
+func ContextCenterSquare(gtx layout.Context, apothem int) (min image.Point, max image.Point) {
+	min = image.Pt(gtx.Constraints.Max.X/2-apothem, gtx.Constraints.Max.Y/2-apothem)
+	max = image.Pt(gtx.Constraints.Max.X/2+apothem, gtx.Constraints.Max.Y/2+apothem)
+	return
+}
+
+// CenterSquare returns two points representing the upper left corner (min) and lower right corner (max) of a square around the given center point.
+func CenterSquare(center image.Point, apothem int) (min image.Point, max image.Point) {
+	min = image.Pt(center.X-apothem, center.Y-apothem)
+	max = image.Pt(center.X+apothem, center.Y+apothem)
+	return
+}

shapes/circle.go

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+package shapes
+
+import (
+	"gioutils/internal"
+	"gioutils/points"
+	"image"
+	"image/color"
+
+	"gioui.org/layout"
+	"gioui.org/op/clip"
+	"gioui.org/op/paint"
+)
+
+type Circle struct {
+	color  color.NRGBA
+	min    image.Point
+	max    image.Point
+	radius int
+}
+
+// CircleFromPoints returns a new Circle based on two rectangular corners.
+func CircleFromPoints(min image.Point, max image.Point) *Circle {
+	return &Circle{
+		color: internal.DefaultBgColor,
+		min:   min,
+		max:   max,
+	}
+}
+
+// CircleFromCenter returns a new Circle based on a central point and a radius.
+func CircleFromCenter(center image.Point, radius int) *Circle {
+	min, max := points.CenterSquare(center, radius)
+	return &Circle{
+		color:  internal.DefaultBgColor,
+		min:    min,
+		max:    max,
+		radius: radius,
+	}
+}
+
+// Color sets the color of the Circle.
+func (c *Circle) Color(color color.NRGBA) *Circle {
+	c.color = color
+	return c
+}
+
+// Draw returns the Circle widget.
+func (c *Circle) Draw() layout.Widget {
+	return func(gtx layout.Context) layout.Dimensions {
+		circle := clip.Ellipse{
+			Min: c.min,
+			Max: c.max,
+		}.Op(gtx.Ops)
+		paint.FillShape(gtx.Ops, c.color, circle)
+
+		// width := c.max.X - c.min.X
+		// height := c.max.Y - c.min.Y
+
+		diameter := c.radius * 2
+		return layout.Dimensions{Size: image.Pt(diameter, diameter)}
+	}
+}

shapes/rectangle.go

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+package shapes
+
+import (
+	"gioutils/internal"
+	"gioutils/points"
+	"image"
+	"image/color"
+
+	"gioui.org/layout"
+	"gioui.org/op/clip"
+	"gioui.org/op/paint"
+)
+
+type Rectangle struct {
+	color color.NRGBA
+	min   image.Point
+	max   image.Point
+}
+
+// RectangleFromPoints returns a new Rectangle based on two corner points.
+func RectangleFromPoints(min image.Point, max image.Point) *Rectangle {
+	return &Rectangle{
+		color: internal.DefaultBgColor,
+		min:   min,
+		max:   max,
+	}
+}
+
+// RectangleFromCenter returns a new Rectangle based on a central point and a given apothem.
+func RectangleFromCenter(center image.Point, apothem int) *Rectangle {
+	min, max := points.CenterSquare(center, apothem)
+	return &Rectangle{
+		color: internal.DefaultBgColor,
+		min:   min,
+		max:   max,
+	}
+}
+
+// Color sets the color of the Rectangle.
+func (r *Rectangle) Color(color color.NRGBA) *Rectangle {
+	r.color = color
+	return r
+}
+
+// Draw returns the Rectangle widget.
+func (r *Rectangle) Draw() layout.Widget {
+	return func(gtx layout.Context) layout.Dimensions {
+		rect := clip.Rect{
+			Min: r.min,
+			Max: r.max,
+		}.Op()
+		paint.FillShape(gtx.Ops, r.color, rect)
+
+		width := r.max.X - r.min.X
+		height := r.max.Y - r.min.Y
+
+		return layout.Dimensions{Size: image.Pt(width, height)}
+	}
+}