Initial commit

6 months ago · 1b8a1f536a
15 changed files with 672 additions and 0 deletions
--- a/21
+++ b/21
@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 Trevor Slocum <trevor@rocketnine.space>
+
+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.
--- a/README.md
+++ b/README.md
@ -0,0 +1,18 @@
+# etk - Ebitengine Tool Kit
+[![GoDoc](https://code.rocketnine.space/tslocum/godoc-static/raw/branch/master/badge.svg)](https://docs.rocketnine.space/code.rocketnine.space/tslocum/etk)
+[![Donate via LiberaPay](https://img.shields.io/liberapay/receives/rocketnine.space.svg?logo=liberapay)](https://liberapay.com/rocketnine.space)
+[![Donate via Patreon](https://img.shields.io/badge/dynamic/json?color=%23e85b46&label=Patreon&query=data.attributes.patron_count&suffix=%20patrons&url=https%3A%2F%2Fwww.patreon.com%2Fapi%2Fcampaigns%2F5252223)](https://www.patreon.com/rocketnine)
+
+[Ebitengine](https://github.com/hajimehoshi/ebiten) tool kit for creating graphical user interfaces
+
+
+**Note:** This library is still in development. Breaking changes may be made until v1.0 is released.
+[IME](https://en.wikipedia.org/wiki/Input_method) is not yet supported.
+
+## Documentation
+
+Documentation is available via [godoc](https://docs.rocketnine.space/code.rocketnine.space/tslocum/etk).
+
+## Support
+
+Please share issues and suggestions [here](https://code.rocketnine.space/tslocum/etk/issues).
--- a/box.go
+++ b/box.go
@ -0,0 +1,46 @@
+package etk
+
+import (
+	"image"
+	"sync"
+)
+
+type Box struct {
+	rect image.Rectangle
+
+	children []Widget
+
+	sync.Mutex
+}
+
+func NewBox() *Box {
+	return &Box{}
+}
+
+func (b *Box) Rect() image.Rectangle {
+	b.Lock()
+	defer b.Unlock()
+
+	return b.rect
+}
+
+func (b *Box) SetRect(r image.Rectangle) {
+	b.Lock()
+	defer b.Unlock()
+
+	b.rect = r
+}
+
+func (b *Box) Children() []Widget {
+	b.Lock()
+	defer b.Unlock()
+
+	return b.children
+}
+
+func (b *Box) AddChild(w ...Widget) {
+	b.Lock()
+	defer b.Unlock()
+
+	b.children = append(b.children, w...)
+}
--- a/button.go
+++ b/button.go
@ -0,0 +1,90 @@
+package etk
+
+import (
+	"image"
+	"image/color"
+	"log"
+
+	"code.rocketnine.space/tslocum/messeji"
+	"github.com/hajimehoshi/ebiten/v2/examples/resources/fonts"
+	"golang.org/x/image/font"
+	"golang.org/x/image/font/opentype"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+// TODO
+var mplusNormalFont font.Face
+
+func init() {
+	tt, err := opentype.Parse(fonts.MPlus1pRegular_ttf)
+	if err != nil {
+		log.Fatal(err)
+	}
+	const dpi = 72
+	mplusNormalFont, err = opentype.NewFace(tt, &opentype.FaceOptions{
+		Size:    32,
+		DPI:     dpi,
+		Hinting: font.HintingFull,
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+type Button struct {
+	*Box
+
+	label *messeji.TextField
+}
+
+func NewButton(label string, onSelected func()) *Button {
+	textColor := Style.ButtonTextColor
+	if textColor == nil {
+		textColor = Style.TextColor
+	}
+
+	l := messeji.NewTextField(mplusNormalFont)
+	l.SetText(label)
+	l.SetForegroundColor(textColor)
+	l.SetBackgroundColor(color.RGBA{0, 0, 0, 0})
+	l.SetHorizontal(messeji.AlignCenter)
+	l.SetVertical(messeji.AlignCenter)
+
+	return &Button{
+		Box:   NewBox(),
+		label: l, // TODO
+	}
+}
+
+func (b *Button) SetRect(r image.Rectangle) {
+	b.Box.rect = r
+
+	b.label.SetRect(r)
+}
+
+func (b *Button) HandleMouse() (handled bool, err error) {
+	return false, nil
+}
+
+func (b *Button) HandleKeyboard() (handled bool, err error) {
+	return false, nil
+}
+
+func (b *Button) Draw(screen *ebiten.Image) error {
+	// TODO background color
+	// Draw background.
+	screen.SubImage(b.rect).(*ebiten.Image).Fill(Style.ButtonBgColor)
+
+	// Draw label.
+	b.label.Draw(screen)
+
+	// Draw border.
+	const borderSize = 4
+	screen.SubImage(image.Rect(b.rect.Min.X, b.rect.Min.Y, b.rect.Max.X, b.rect.Min.Y+borderSize)).(*ebiten.Image).Fill(Style.BorderColor)
+	screen.SubImage(image.Rect(b.rect.Min.X, b.rect.Max.Y-borderSize, b.rect.Max.X, b.rect.Max.Y)).(*ebiten.Image).Fill(Style.BorderColor)
+	screen.SubImage(image.Rect(b.rect.Min.X, b.rect.Min.Y, b.rect.Min.X+borderSize, b.rect.Max.Y)).(*ebiten.Image).Fill(Style.BorderColor)
+	screen.SubImage(image.Rect(b.rect.Max.X-borderSize, b.rect.Min.Y, b.rect.Max.X, b.rect.Max.Y)).(*ebiten.Image).Fill(Style.BorderColor)
+
+	return nil
+}
--- a/doc.go
+++ b/doc.go
@ -0,0 +1,4 @@
+/*
+Package etk provides an Ebitengine tool kit for creating graphical user interfaces.
+*/
+package etk
--- a/examples/flex/game.go
+++ b/examples/flex/game.go
@ -0,0 +1,33 @@
+//go:build example
+// +build example
+
+package main
+
+import (
+	"code.rocketnine.space/tslocum/etk"
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type game struct {
+}
+
+func newGame() *game {
+	g := &game{}
+	return g
+}
+
+func (g *game) Layout(outsideWidth, outsideHeight int) (screenWidth, screenHeight int) {
+	etk.Layout(outsideWidth, outsideHeight)
+	return outsideWidth, outsideHeight
+}
+
+func (g *game) Update() error {
+	return etk.Update()
+}
+
+func (g *game) Draw(screen *ebiten.Image) {
+	err := etk.Draw(screen)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/examples/flex/main.go
+++ b/examples/flex/main.go
@ -0,0 +1,39 @@
+//go:build example
+// +build example
+
+package main
+
+import (
+	"code.rocketnine.space/tslocum/etk"
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+func main() {
+	ebiten.SetWindowTitle("etk showcase")
+
+	g := newGame()
+
+	b1 := etk.NewButton("Button 1", nil)
+	b2 := etk.NewButton("Button 2", nil)
+
+	topFlex := etk.NewFlex()
+	topFlex.AddChild(b1, b2)
+
+	b3 := etk.NewButton("Button 3", nil)
+	b4 := etk.NewButton("Button 4", nil)
+	b5 := etk.NewButton("Button 5", nil)
+
+	bottomFlex := etk.NewFlex()
+	bottomFlex.AddChild(b3, b4, b5)
+
+	rootFlex := etk.NewFlex()
+	rootFlex.SetVertical(true)
+	rootFlex.AddChild(topFlex, bottomFlex)
+
+	etk.SetRoot(rootFlex)
+
+	err := ebiten.RunGame(g)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/examples/showcase/game.go
+++ b/examples/showcase/game.go
@ -0,0 +1,33 @@
+//go:build example
+// +build example
+
+package main
+
+import (
+	"code.rocketnine.space/tslocum/etk"
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type game struct {
+}
+
+func newGame() *game {
+	g := &game{}
+	return g
+}
+
+func (g *game) Layout(outsideWidth, outsideHeight int) (screenWidth, screenHeight int) {
+	etk.Layout(outsideWidth, outsideHeight)
+	return outsideWidth, outsideHeight
+}
+
+func (g *game) Update() error {
+	return etk.Update()
+}
+
+func (g *game) Draw(screen *ebiten.Image) {
+	err := etk.Draw(screen)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/examples/showcase/main.go
+++ b/examples/showcase/main.go
@ -0,0 +1,39 @@
+//go:build example
+// +build example
+
+package main
+
+import (
+	"code.rocketnine.space/tslocum/etk"
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+func main() {
+	ebiten.SetWindowTitle("etk showcase")
+
+	g := newGame()
+
+	b1 := etk.NewButton("Button 1", nil)
+	b2 := etk.NewButton("Button 2", nil)
+
+	topFlex := etk.NewFlex()
+	topFlex.AddChild(b1, b2)
+
+	b3 := etk.NewButton("Button 3", nil)
+	b4 := etk.NewButton("Button 4", nil)
+	b5 := etk.NewButton("Button 5", nil)
+
+	bottomFlex := etk.NewFlex()
+	bottomFlex.AddChild(b3, b4, b5)
+
+	rootFlex := etk.NewFlex()
+	rootFlex.SetVertical(true)
+	rootFlex.AddChild(topFlex, bottomFlex)
+
+	etk.SetRoot(rootFlex)
+
+	err := ebiten.RunGame(g)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/flex.go
+++ b/flex.go
@ -0,0 +1,110 @@
+package etk
+
+import (
+	"image"
+	"log"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type Flex struct {
+	*Box
+
+	vertical bool
+
+	lastRect image.Rectangle
+}
+
+func NewFlex() *Flex {
+	return &Flex{
+		Box: NewBox(),
+	}
+}
+
+func (f *Flex) SetRect(r image.Rectangle) {
+	f.Lock()
+	defer f.Unlock()
+
+	f.Box.rect = r
+
+	// TODO
+	for _, child := range f.children {
+		child.SetRect(r)
+	}
+}
+
+func (f *Flex) SetVertical(v bool) {
+	f.Lock()
+	defer f.Unlock()
+
+	if f.vertical == v {
+		return
+	}
+
+	f.vertical = v
+	f.reposition()
+}
+
+func (f *Flex) HandleMouse() (handled bool, err error) {
+	return false, nil
+}
+
+func (f *Flex) HandleKeyboard() (handled bool, err error) {
+	return false, nil
+}
+
+func (f *Flex) Draw(screen *ebiten.Image) error {
+	f.Lock()
+	defer f.Unlock()
+
+	if !f.rect.Eq(f.lastRect) {
+		f.reposition()
+		f.lastRect = f.rect
+	}
+
+	for _, child := range f.children {
+		err := child.Draw(screen)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (f *Flex) reposition() {
+	l := len(f.children)
+	r := f.rect
+
+	if f.vertical {
+		childHeight := float64(r.Dy()) / float64(l)
+
+		minY := r.Min.Y
+		for i, child := range f.children {
+			maxY := r.Min.Y + int(childHeight*float64(i+1))
+			if i == l-1 {
+				maxY = r.Max.Y
+			}
+			log.Println(i, maxY, image.Rect(r.Min.X, minY, r.Max.X, maxY))
+			child.SetRect(image.Rect(r.Min.X, minY, r.Max.X, maxY))
+
+			minY = maxY
+		}
+
+		return
+	}
+
+	childWidth := float64(r.Dx()) / float64(l)
+
+	minX := r.Min.X
+	for i, child := range f.children {
+		maxX := r.Min.X + int(childWidth*float64(i+1))
+		if i == l-1 {
+			maxX = r.Max.X
+		}
+		log.Println(i, maxX, image.Rect(minX, r.Min.Y, maxX, r.Max.Y))
+		child.SetRect(image.Rect(minX, r.Min.Y, maxX, r.Max.Y))
+
+		minX = maxX
+	}
+}
--- a/game.go
+++ b/game.go
@ -0,0 +1,91 @@
+package etk
+
+import (
+	"fmt"
+	"image"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+var root Widget
+
+var (
+	lastWidth, lastHeight int
+)
+
+func SetRoot(w Widget) {
+	root = w
+}
+
+func Layout(outsideWidth, outsideHeight int) {
+	if root == nil {
+		panic("no root widget specified")
+	}
+
+	if outsideWidth != lastWidth || outsideHeight != lastHeight {
+		root.SetRect(image.Rect(0, 0, outsideWidth, outsideHeight))
+		lastWidth, lastHeight = outsideWidth, outsideHeight
+	}
+}
+
+func Update() error {
+	if root == nil {
+		panic("no root widget specified")
+	}
+
+	var mouseHandled bool
+	var keyboardHandled bool
+	var err error
+
+	children := root.Children()
+	for _, child := range children {
+		if !mouseHandled {
+			mouseHandled, err = child.HandleMouse()
+			if err != nil {
+				return fmt.Errorf("failed to handle widget mouse input: %s", err)
+			}
+		}
+		if !keyboardHandled {
+			keyboardHandled, err = child.HandleKeyboard()
+			if err != nil {
+				return fmt.Errorf("failed to handle widget keyboard input: %s", err)
+			}
+		}
+		if mouseHandled && keyboardHandled {
+			return nil
+		}
+	}
+	if !mouseHandled {
+		_, err = root.HandleMouse()
+		if err != nil {
+			return fmt.Errorf("failed to handle widget mouse input: %s", err)
+		}
+	}
+	if !keyboardHandled {
+		_, err = root.HandleKeyboard()
+		if err != nil {
+			return fmt.Errorf("failed to handle widget keyboard input: %s", err)
+		}
+	}
+	return nil
+}
+
+func Draw(screen *ebiten.Image) error {
+	if root == nil {
+		panic("no root widget specified")
+	}
+
+	err := root.Draw(screen)
+	if err != nil {
+		return fmt.Errorf("failed to draw widget: %s", err)
+	}
+
+	children := root.Children()
+	for _, child := range children {
+		err = child.Draw(screen)
+		if err != nil {
+			return fmt.Errorf("failed to draw widget: %s", err)
+		}
+	}
+	return nil
+}
--- a/go.mod
+++ b/go.mod
@ -0,0 +1,20 @@
+module code.rocketnine.space/tslocum/etk
+
+go 1.18
+
+require (
+	code.rocketnine.space/tslocum/messeji v1.0.0
+	github.com/hajimehoshi/ebiten/v2 v2.3.3
+	golang.org/x/image v0.0.0-20220601225756-64ec528b34cd
+)
+
+require (
+	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20220516021902-eb3e265c7661 // indirect
+	github.com/gofrs/flock v0.8.1 // indirect
+	github.com/jezek/xgb v1.0.1 // indirect
+	golang.org/x/exp/shiny v0.0.0-20220609121020-a51bd0440498 // indirect
+	golang.org/x/mobile v0.0.0-20220518205345-8578da9835fd // indirect
+	golang.org/x/sync v0.0.0-20220601150217-0de741cfad7f // indirect
+	golang.org/x/sys v0.0.0-20220608164250-635b8c9b7f68 // indirect
+	golang.org/x/text v0.3.7 // indirect
+)
--- a/go.sum
+++ b/go.sum
@ -0,0 +1,90 @@
+code.rocketnine.space/tslocum/messeji v1.0.0 h1:GRZ8/ExI/syR3+0UH3cMjnJFhJnGxQOMSMoCf/v7XLM=
+code.rocketnine.space/tslocum/messeji v1.0.0/go.mod h1:o3MnboWYp/W/ZsYCzga4t/pyzLfXnf6iK8R3KBJuHIM=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20220320163800-277f93cfa958/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20220516021902-eb3e265c7661 h1:1bpooddSK2996NWM/1TW59cchQOm9MkoV9DkhSJH1BI=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20220516021902-eb3e265c7661/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
+github.com/gofrs/flock v0.8.1 h1:+gYjHKf32LDeiEEFhQaotPbLuUXjY5ZqxKgXy7n59aw=
+github.com/gofrs/flock v0.8.1/go.mod h1:F1TvTiK9OcQqauNUHlbJvyl9Qa1QvF/gOUDKA14jxHU=
+github.com/hajimehoshi/bitmapfont/v2 v2.2.0 h1:E6vzlchynZj6OVohVKFqWkKW348EmDW62K5zPXDi7A8=
+github.com/hajimehoshi/bitmapfont/v2 v2.2.0/go.mod h1:Llj2wTYXMuCTJEw2ATNIO6HbFPOoBYPs08qLdFAxOsQ=
+github.com/hajimehoshi/ebiten/v2 v2.3.3 h1:v72UzprVvWGE+HGcypkLI9Ikd237fqzpio5idPk9KNI=
+github.com/hajimehoshi/ebiten/v2 v2.3.3/go.mod h1:vxwpo0q0oSi1cIll0Q3Ui33TVZgeHuFVYzIRk7FwuVk=
+github.com/hajimehoshi/file2byteslice v0.0.0-20210813153925-5340248a8f41/go.mod h1:CqqAHp7Dk/AqQiwuhV1yT2334qbA/tFWQW0MD2dGqUE=
+github.com/hajimehoshi/go-mp3 v0.3.3/go.mod h1:qMJj/CSDxx6CGHiZeCgbiq2DSUkbK0UbtXShQcnfyMM=
+github.com/hajimehoshi/oto v0.6.1/go.mod h1:0QXGEkbuJRohbJaxr7ZQSxnju7hEhseiPx2hrh6raOI=
+github.com/hajimehoshi/oto/v2 v2.1.0/go.mod h1:9i0oYbpJ8BhVGkXDKdXKfFthX1JUNfXjeTp944W8TGM=
+github.com/jakecoffman/cp v1.1.0/go.mod h1:JjY/Fp6d8E1CHnu74gWNnU0+b9VzEdUVPoJxg2PsTQg=
+github.com/jezek/xgb v1.0.0/go.mod h1:nrhwO0FX/enq75I7Y7G8iN1ubpSGZEiA3v9e9GyRFlk=
+github.com/jezek/xgb v1.0.1 h1:YUGhxps0aR7J2Xplbs23OHnV1mWaxFVcOl9b+1RQkt8=
+github.com/jezek/xgb v1.0.1/go.mod h1:nrhwO0FX/enq75I7Y7G8iN1ubpSGZEiA3v9e9GyRFlk=
+github.com/jfreymuth/oggvorbis v1.0.3/go.mod h1:1U4pqWmghcoVsCJJ4fRBKv9peUJMBHixthRlBeD6uII=
+github.com/jfreymuth/vorbis v1.0.2/go.mod h1:DoftRo4AznKnShRl1GxiTFCseHr4zR9BN3TWXyuzrqQ=
+github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
+github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/pkg/browser v0.0.0-20210911075715-681adbf594b8/go.mod h1:HKlIX3XHQyzLZPlr7++PzdhaXEj94dEiJgZDTsxEqUI=
+github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
+github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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--- a/style.go
+++ b/style.go
@ -0,0 +1,22 @@
+package etk
+
+import "image/color"
+
+type Attributes struct {
+	TextColor color.Color
+
+	BorderColor color.Color
+
+	ButtonTextColor       color.Color
+	ButtonBgColor         color.Color
+	ButtonBgColorDisabled color.Color
+}
+
+var Style = &Attributes{
+	TextColor: color.RGBA{0, 0, 0, 255},
+
+	BorderColor: color.RGBA{0, 0, 0, 255},
+
+	ButtonBgColor:         color.RGBA{255, 255, 255, 255},
+	ButtonBgColorDisabled: color.RGBA{110, 110, 110, 255},
+}
--- a/widget.go
+++ b/widget.go
@ -0,0 +1,16 @@
+package etk
+
+import (
+	"image"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type Widget interface {
+	Rect() image.Rectangle
+	SetRect(r image.Rectangle)
+	HandleMouse() (handled bool, err error)
+	HandleKeyboard() (handled bool, err error)
+	Draw(screen *ebiten.Image) error
+	Children() []Widget
+}