dialog skeleton

domain/domain.go

@@ -1,8 +1,36 @@
 package domain
 
+import (
+	"game/konstructor"
+	"image/color"
+)
+
 type Domain struct {
 	Context Context
 }
 
 func (d *Domain) Init() {
 }
+
+func (d *Domain) GetDialog() konstructor.Dialog {
+	return konstructor.Dialog{
+		Layout: konstructor.DialogLayout{
+			ChoiceFont: konstructor.FontLayout{
+				DPI:           72,
+				Size:          24,
+				Color:         color.White,
+				SelectedColor: color.RGBA{R: 0, G: 255, B: 0, A: 100},
+			},
+		},
+		Choices: []konstructor.DialogChoice{
+			{
+				ID:    "one",
+				Label: "One",
+			},
+			{
+				ID:    "two",
+				Label: "Two",
+			},
+		},
+	}
+}

konstructor/dialog.go

@@ -0,0 +1,60 @@
+package konstructor
+
+import (
+	"image/color"
+
+	"github.com/hajimehoshi/ebiten"
+	"github.com/hajimehoshi/ebiten/text"
+)
+
+type DialogLayout struct {
+	Background string
+	ChoiceFont FontLayout
+}
+
+type DialogChoice struct {
+	ID      string
+	Label   string
+	Handler func()
+}
+
+type Dialog struct {
+	CurrentSelected int
+	Layout          DialogLayout
+	Choices         []DialogChoice
+}
+
+func (dialog *Dialog) GetChoiceColor(i int) color.Color {
+	if dialog.CurrentSelected == i {
+		return dialog.Layout.ChoiceFont.SelectedColor
+	} else {
+		return dialog.Layout.ChoiceFont.Color
+	}
+}
+
+func (e *Engine) DialogDraw(screen *ebiten.Image) {
+	dialog := e.Domain.GetDialog()
+
+	face := GetFontFace(dialog.Layout.ChoiceFont)
+
+	for i, choice := range dialog.Choices {
+		offset := int(dialog.Layout.ChoiceFont.Size) * (i + 1)
+		text.Draw(screen, choice.Label+"\n", face, 8, offset, dialog.GetChoiceColor(i))
+	}
+}
+
+func (e *Engine) DialogUpdate() {
+	dialog := e.Domain.GetDialog()
+
+	if e.Controller.UpPressed() && dialog.CurrentSelected != 0 {
+		dialog.CurrentSelected--
+	}
+
+	if e.Controller.DownPressed() && dialog.CurrentSelected != len(dialog.Choices)-1 {
+		dialog.CurrentSelected++
+	}
+
+	if e.Controller.Action0Pressed() {
+		dialog.Choices[dialog.CurrentSelected].Handler()
+	}
+}

konstructor/engine.go

@@ -18,18 +18,28 @@ func (e *Engine) Layout(outsideWidth, outsideHeight int) (int, int) {
 	return e.Settings.Screen.Width, e.Settings.Screen.Height
 }
 
+func (e *Engine) ScreenTypeIs(name string) bool {
+	return e.KContext.Screen.Type == name
+}
+
 func (e *Engine) Update(screen *ebiten.Image) error {
 	e.Controller.Watch()
-	if e.KContext.Screen.Type == "menu" {
+	if e.ScreenTypeIs("menu") {
 		e.MenuUpdate()
 	}
+	if e.ScreenTypeIs("dialog") {
+		e.DialogUpdate()
+	}
 	return nil
 }
 
 func (e *Engine) Draw(screen *ebiten.Image) {
-	if e.KContext.Screen.Type == "menu" {
+	if e.ScreenTypeIs("menu") {
 		e.MenuDraw(screen)
 	}
+	if e.ScreenTypeIs("dialog") {
+		e.DialogDraw(screen)
+	}
 	if e.Controller.Action3Pressed() {
 		os.Exit(1)
 	}

konstructor/kcontext.go

@@ -0,0 +1,10 @@
+package konstructor
+
+type KContextScreen struct {
+	Type  string
+	Value string
+}
+
+type KContext struct {
+	Screen KContextScreen
+}

konstructor/konstructor.go

@@ -11,6 +11,7 @@ type ContextInterface interface {
 
 type DomainInterface interface {
 	Init()
+	GetDialog() Dialog
 }
 
 type ScreenSettings struct {
@@ -18,15 +19,6 @@ type ScreenSettings struct {
 	Height int
 }
 
-type KContextScreen struct {
-	Type  string
-	Value string
-}
-
-type KContext struct {
-	Screen KContextScreen
-}
-
 type Settings struct {
 	Name   string
 	Screen *ScreenSettings

konstructor/menu.go

@@ -4,20 +4,14 @@ import (
 	"image/color"
 
 	"github.com/hajimehoshi/ebiten"
-	"github.com/hajimehoshi/ebiten/examples/resources/fonts"
 	"github.com/hajimehoshi/ebiten/text"
-	"golang.org/x/image/font"
-	"golang.org/x/image/font/opentype"
 )
 
 type MenuMap map[string]Menu
 
 type MenuLayout struct {
 	Background   string
-	DPI           float64
+	MenuItemFont FontLayout
-	Size          float64
-	Color         color.Color
-	SelectedColor color.Color
 }
 
 type MenuItem struct {
@@ -28,23 +22,26 @@ type MenuItem struct {
 
 type Menu struct {
 	CurrentSelected int
-	MenuLayout      MenuLayout
+	Layout          MenuLayout
 	MenuItems       []MenuItem
 }
 
+func (menu *Menu) GetMenuItemColor(i int) color.Color {
+	if menu.CurrentSelected == i {
+		return menu.Layout.MenuItemFont.SelectedColor
+	} else {
+		return menu.Layout.MenuItemFont.Color
+	}
+}
+
 func (e *Engine) MenuDraw(screen *ebiten.Image) {
 	menu := e.MenuMap[e.KContext.Screen.Value]
-	face := e.menuGetFontFace(menu)
+	face := GetFontFace(menu.Layout.MenuItemFont)
 
 	for i, menu_item := range menu.MenuItems {
-		var c color.Color
+		color := menu.GetMenuItemColor(i)
-		if menu.CurrentSelected == i {
+		offset := int(menu.Layout.MenuItemFont.Size) * (i + 1)
-			c = menu.MenuLayout.SelectedColor
+		text.Draw(screen, menu_item.Label+"\n", face, 8, offset, color)
-		} else {
-			c = menu.MenuLayout.Color
-		}
-		offset := int(menu.MenuLayout.Size) * (i + 1)
-		text.Draw(screen, menu_item.Label+"\n", face, 8, offset, c)
 	}
 }
 
@@ -65,13 +62,3 @@ func (e *Engine) MenuUpdate() {
 
 	e.MenuMap[e.KContext.Screen.Value] = menu
 }
-
-func (e *Engine) menuGetFontFace(menu Menu) font.Face {
-	tt, _ := opentype.Parse(fonts.MPlus1pRegular_ttf)
-	face, _ := opentype.NewFace(tt, &opentype.FaceOptions{
-		Size:    menu.MenuLayout.DPI,
-		DPI:     menu.MenuLayout.Size,
-		Hinting: font.HintingVertical,
-	})
-	return face
-}

konstructor/utils.go

@@ -6,9 +6,13 @@ import (
 	"io/ioutil"
 	"log"
 
+	"image/color"
 	_ "image/png"
 
 	"github.com/hajimehoshi/ebiten"
+	"github.com/hajimehoshi/ebiten/examples/resources/fonts"
+	"golang.org/x/image/font"
+	"golang.org/x/image/font/opentype"
 )
 
 func LoadImage(path string) *ebiten.Image {
@@ -30,3 +34,20 @@ func LoadImage(path string) *ebiten.Image {
 
 	return out
 }
+
+type FontLayout struct {
+	DPI           float64
+	Size          float64
+	Color         color.Color
+	SelectedColor color.Color
+}
+
+func GetFontFace(layout FontLayout) font.Face {
+	tt, _ := opentype.Parse(fonts.MPlus1pRegular_ttf)
+	face, _ := opentype.NewFace(tt, &opentype.FaceOptions{
+		Size:    layout.DPI,
+		DPI:     layout.Size,
+		Hinting: font.HintingVertical,
+	})
+	return face
+}

main.go

@@ -24,20 +24,21 @@ func main() {
 	k := konstructor.Konstructor{
 		KContext: &konstructor.KContext{
 			Screen: konstructor.KContextScreen{
-				Type:  "menu",
+				Type: "dialog",
-				Value: "MainMenu",
 			},
 		},
 		Domain: &d,
 		MenuMap: konstructor.MenuMap{
 			"MainMenu": {
 				CurrentSelected: 0,
-				MenuLayout: konstructor.MenuLayout{
+				Layout: konstructor.MenuLayout{
+					MenuItemFont: konstructor.FontLayout{
 						DPI:           72,
 						Size:          24,
 						Color:         color.White,
 						SelectedColor: color.RGBA{R: 0, G: 255, B: 0, A: 100},
 					},
+				},
 				MenuItems: []konstructor.MenuItem{
 					{
 						ID:      "start",
@@ -58,12 +59,14 @@ func main() {
 			},
 			"GameMenu": {
 				CurrentSelected: 0,
-				MenuLayout: konstructor.MenuLayout{
+				Layout: konstructor.MenuLayout{
+					MenuItemFont: konstructor.FontLayout{
 						DPI:           72,
 						Size:          24,
 						Color:         color.White,
 						SelectedColor: color.RGBA{R: 0, G: 255, B: 0, A: 100},
 					},
+				},
 				MenuItems: []konstructor.MenuItem{
 					{
 						ID:      "save",