added select and popup screens

TODO.md

@@ -10,3 +10,16 @@
 
 - Grid Observer:
   https://github.com/mlange-42/arche/issues/374
+
+
+Screenshot:
+
+Yes, since *ebiten.Image implements the standard image.Image interface
+I just made a screenshot example (in Draw() function):
+if inpututil.IsKeyJustPressed(ebiten.KeyS) {
+    f, err := os.Create("screenshot.png")
+    if err != nil {
+        log.Fatal("can't create file: ", err)
+    }
+    png.Encode(f, screen)
+}

game/about_scene.go

@@ -50,6 +50,10 @@ func (scene *AboutScene) ResetNext() {
 	scene.Next = scene.Whoami
 }
 
+func (scene *AboutScene) Clearscreen() bool {
+	return true
+}
+
 func (scene *AboutScene) Update() error {
 	scene.Ui.Update()
 	return nil
@@ -66,7 +70,7 @@ func (scene *AboutScene) SetupUI() {
 
 	buttonBack := gameui.NewMenuButton("Back", *assets.FontRenderer.FontNormal,
 		func(args *widget.ButtonClickedEventArgs) {
-			scene.SetNext(Select)
+			scene.SetNext(Menu)
 		})
 
 	label := widget.NewText(

game/game.go

@@ -16,6 +16,7 @@ type Game struct {
 	Scenes                    map[SceneName]Scene
 	CurrentScene              SceneName
 	Observer                  *observers.GameObserver
+	Levels                    []*Level // needed to feed select_scene
 }
 
 func NewGame(width, height, cellsize, startlevel int, startscene SceneName) *Game {
@@ -34,9 +35,12 @@ func NewGame(width, height, cellsize, startlevel int, startscene SceneName) *Gam
 	game.Observer = observers.NewGameObserver(&world, startlevel, width, height, cellsize)
 
 	game.Scenes[Welcome] = NewWelcomeScene(game)
-	game.Scenes[Select] = NewSelectScene(game)
+	game.Scenes[Menu] = NewMenuScene(game)
 	game.Scenes[About] = NewAboutScene(game)
+	game.Scenes[Popup] = NewPopupScene(game)
 	game.Scenes[Play] = NewLevelScene(game, startlevel)
+	game.Scenes[Select] = NewSelectScene(game)
+
 	game.CurrentScene = startscene
 
 	fmt.Println(game.World.Stats().String())
@@ -50,6 +54,9 @@ func (game *Game) GetCurrentScene() Scene {
 
 func (game *Game) Update() error {
 	gameobserver := observers.GetGameObserver(game.World)
+
+	// handle level ends
+	// FIXME: add a scene here, which asks: restart, next or abort
 	timer := gameobserver.StopTimer
 
 	if timer.IsReady() {
@@ -61,6 +68,12 @@ func (game *Game) Update() error {
 	scene := game.GetCurrentScene()
 	scene.Update()
 
+	if scene.Clearscreen() {
+		ebiten.SetScreenClearedEveryFrame(true)
+	} else {
+		ebiten.SetScreenClearedEveryFrame(false)
+	}
+
 	next := scene.GetNext()
 	if next != game.CurrentScene {
 		scene.ResetNext()

game/level_scene.go

@@ -30,6 +30,8 @@ func (scene *LevelScene) GenerateLevels(game *Game) {
 	for _, level := range assets.Levels {
 		scene.Levels = append(scene.Levels, NewLevel(game, 32, &level))
 	}
+
+	scene.Game.Levels = scene.Levels
 }
 
 // Interface methods
@@ -46,18 +48,28 @@ func (scene *LevelScene) ResetNext() {
 	scene.Next = scene.Whoami
 }
 
+func (scene *LevelScene) Clearscreen() bool {
+	return false
+}
+
 func (scene *LevelScene) Update() error {
+
+	scene.Levels[scene.CurrentLevel].Update()
+
+	switch {
+	case ebiten.IsKeyPressed(ebiten.KeyEscape):
+		scene.SetNext(Popup)
+	}
+
+	return nil
+}
+
+func (scene *LevelScene) Draw(screen *ebiten.Image) {
 	if scene.CurrentLevel != scene.Game.Observer.CurrentLevel {
 		slog.Debug("level", "current", scene.CurrentLevel, "next", scene.Game.Observer.CurrentLevel)
 		scene.CurrentLevel = scene.Game.Observer.CurrentLevel
 		scene.Levels[scene.CurrentLevel].SetupGrid(scene.Game)
 	}
-
-	scene.Levels[scene.CurrentLevel].Update()
-	return nil
-}
-
-func (scene *LevelScene) Draw(screen *ebiten.Image) {
 	screen.Clear()
 	scene.Levels[scene.CurrentLevel].Draw(screen)
 }

game/levels.go

@@ -39,6 +39,7 @@ func NewLevel(game *Game, cellsize int, plan *assets.RawLevel) *Level {
 		Width:       game.ScreenWidth,
 		Height:      game.ScreenHeight,
 		Description: plan.Description,
+		Name:        plan.Name,
 		GridSystem:  gridsystem,
 		Player:      playersystem,
 	}

game/menu_scene.go

@@ -0,0 +1,97 @@
+package game
+
+import (
+	"image/color"
+	"log/slog"
+	"openquell/assets"
+	"openquell/gameui"
+	"os"
+
+	"github.com/ebitenui/ebitenui"
+	"github.com/ebitenui/ebitenui/widget"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type MenuScene struct {
+	Game     *Game
+	Next     SceneName
+	Whoami   SceneName
+	UseCache bool
+	Ui       *ebitenui.UI
+}
+
+func NewMenuScene(game *Game) Scene {
+	scene := &MenuScene{Whoami: Menu, Game: game, Next: Menu}
+
+	scene.SetupUI()
+
+	return scene
+}
+
+func (scene *MenuScene) GetNext() SceneName {
+	return scene.Next
+}
+
+func (scene *MenuScene) ResetNext() {
+	scene.Next = scene.Whoami
+}
+
+func (scene *MenuScene) SetNext(next SceneName) {
+	slog.Debug("select setnext", "next", next)
+	scene.Next = next
+}
+
+func (scene *MenuScene) Clearscreen() bool {
+	return true
+}
+
+func (scene *MenuScene) Update() error {
+	scene.Ui.Update()
+	return nil
+}
+
+func (scene *MenuScene) Draw(screen *ebiten.Image) {
+	scene.Ui.Draw(screen)
+}
+
+func (scene *MenuScene) SetupUI() {
+	blue := color.RGBA{0, 255, 128, 255}
+
+	rowContainer := gameui.NewRowContainer()
+
+	buttonStartnew := gameui.NewMenuButton("Start new game", *assets.FontRenderer.FontNormal,
+		func(args *widget.ButtonClickedEventArgs) {
+			scene.SetNext(Play)
+		})
+
+	buttonMenuLevel := gameui.NewMenuButton("Select Level", *assets.FontRenderer.FontNormal,
+		func(args *widget.ButtonClickedEventArgs) {
+			scene.SetNext(Select)
+		})
+
+	buttonAbout := gameui.NewMenuButton("About this game", *assets.FontRenderer.FontNormal,
+		func(args *widget.ButtonClickedEventArgs) {
+			scene.SetNext(About)
+		})
+
+	buttonQuit := gameui.NewMenuButton("Quit Game", *assets.FontRenderer.FontNormal,
+		func(args *widget.ButtonClickedEventArgs) {
+			os.Exit(1) // FIXME: present another scene "are you sure and/or thank you"
+		})
+
+	label := widget.NewText(
+		widget.TextOpts.Text("Menu", *assets.FontRenderer.FontBig, blue),
+		widget.TextOpts.Position(widget.TextPositionCenter, widget.TextPositionCenter),
+	)
+
+	rowContainer.AddChild(label)
+	rowContainer.AddChild(buttonStartnew)
+	rowContainer.AddChild(buttonMenuLevel)
+	rowContainer.AddChild(buttonAbout)
+	rowContainer.AddChild(buttonQuit)
+
+	scene.Ui = &ebitenui.UI{
+		Container: rowContainer.Container(),
+	}
+}

game/popup_scene.go

@@ -0,0 +1,101 @@
+package game
+
+import (
+	"image/color"
+	"log/slog"
+	"openquell/assets"
+	"openquell/gameui"
+
+	"github.com/ebitenui/ebitenui"
+	"github.com/ebitenui/ebitenui/widget"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type PopupScene struct {
+	Game     *Game
+	Next     SceneName
+	Whoami   SceneName
+	UseCache bool
+	Ui       *ebitenui.UI
+}
+
+func NewPopupScene(game *Game) Scene {
+	scene := &PopupScene{Whoami: Popup, Game: game, Next: Popup}
+
+	scene.SetupUI()
+
+	return scene
+}
+
+func (scene *PopupScene) GetNext() SceneName {
+	return scene.Next
+}
+
+func (scene *PopupScene) ResetNext() {
+	scene.Next = scene.Whoami
+}
+
+func (scene *PopupScene) SetNext(next SceneName) {
+	slog.Debug("select setnext", "next", next)
+	scene.Next = next
+}
+
+func (scene *PopupScene) Clearscreen() bool {
+	// both level_scene AND the popup must not clear to get an actual popup
+	return false
+}
+
+func (scene *PopupScene) Update() error {
+	scene.Ui.Update()
+	return nil
+}
+
+func (scene *PopupScene) Draw(screen *ebiten.Image) {
+	background := assets.Assets["background-popup"]
+
+	op := &ebiten.DrawImageOptions{}
+	op.GeoM.Translate(
+		float64((scene.Game.ScreenWidth/2)-(background.Bounds().Dx()/2)),
+		float64((scene.Game.ScreenHeight/2)-(background.Bounds().Dy()/2)),
+	)
+
+	screen.DrawImage(assets.Assets["background-popup"], op)
+
+	scene.Ui.Draw(screen)
+}
+
+func (scene *PopupScene) SetupUI() {
+	blue := color.RGBA{0, 255, 128, 255}
+
+	rowContainer := gameui.NewRowContainer(false)
+
+	buttonContinue := gameui.NewMenuButton("Continue", *assets.FontRenderer.FontNormal,
+		func(args *widget.ButtonClickedEventArgs) {
+			scene.SetNext(Play)
+		})
+
+	buttonAbort := gameui.NewMenuButton("Abort", *assets.FontRenderer.FontNormal,
+		func(args *widget.ButtonClickedEventArgs) {
+			scene.SetNext(Menu)
+		})
+
+	buttonOptions := gameui.NewMenuButton("Options", *assets.FontRenderer.FontNormal,
+		func(args *widget.ButtonClickedEventArgs) {
+			scene.SetNext(Settings)
+		})
+
+	label := widget.NewText(
+		widget.TextOpts.Text("Menu", *assets.FontRenderer.FontBig, blue),
+		widget.TextOpts.Position(widget.TextPositionCenter, widget.TextPositionCenter),
+	)
+
+	rowContainer.AddChild(label)
+	rowContainer.AddChild(buttonContinue)
+	rowContainer.AddChild(buttonAbort)
+	rowContainer.AddChild(buttonOptions)
+
+	scene.Ui = &ebitenui.UI{
+		Container: rowContainer.Container(),
+	}
+}

game/scene.go

@@ -5,15 +5,17 @@ import (
 )
 
 const (
-	Welcome = iota
-	Select
-	Play
-	About
-	Settings
+	Welcome  = iota // startup
+	Menu            // main top level menu
+	Play            // actual playing happens here
+	About           // about the game
+	Settings        // options
+	Popup           // in-game options
+	Select          // select which level to play
 )
 
 // Wrapper for  different screens  to be  shown, as  Welcome, Options,
-// About, Select Level and of course the actual Levels.
+// About, Menu Level and of course the actual Levels.
 // Scenes are responsible for screen clearing! That way a scene is able
 // to render its content onto the running level, e.g. the options scene
 // etc.
@@ -21,6 +23,7 @@ type Scene interface {
 	SetNext(SceneName)
 	GetNext() SceneName
 	ResetNext()
+	Clearscreen() bool
 	Update() error
 	Draw(screen *ebiten.Image)
 }

game/select_scene.go

@@ -1,24 +1,26 @@
 package game
 
 import (
+	"fmt"
 	"image/color"
-	"log/slog"
 	"openquell/assets"
 	"openquell/gameui"
-	"os"
+	"openquell/observers"
 
 	"github.com/ebitenui/ebitenui"
+	"github.com/ebitenui/ebitenui/image"
 	"github.com/ebitenui/ebitenui/widget"
 
 	"github.com/hajimehoshi/ebiten/v2"
 )
 
 type SelectScene struct {
-	Game     *Game
-	Next     SceneName
-	Whoami   SceneName
-	UseCache bool
-	Ui       *ebitenui.UI
+	Game          *Game
+	Next          SceneName
+	Whoami        SceneName
+	UseCache      bool
+	Ui            *ebitenui.UI
+	SelectedLevel int
 }
 
 func NewSelectScene(game *Game) Scene {
@@ -38,10 +40,14 @@ func (scene *SelectScene) ResetNext() {
 }
 
 func (scene *SelectScene) SetNext(next SceneName) {
-	slog.Debug("select setnext", "next", next)
 	scene.Next = next
 }
 
+func (scene *SelectScene) Clearscreen() bool {
+	// both level_scene AND the popup must not clear to get an actual popup
+	return true
+}
+
 func (scene *SelectScene) Update() error {
 	scene.Ui.Update()
 	return nil
@@ -51,41 +57,101 @@ func (scene *SelectScene) Draw(screen *ebiten.Image) {
 	scene.Ui.Draw(screen)
 }
 
+type LevelEntry struct {
+	Id   int
+	Name string
+}
+
 func (scene *SelectScene) SetupUI() {
+	gameobserver := observers.GetGameObserver(scene.Game.World)
+
 	blue := color.RGBA{0, 255, 128, 255}
 
 	rowContainer := gameui.NewRowContainer()
 
-	buttonStartnew := gameui.NewMenuButton("Start new game", *assets.FontRenderer.FontNormal,
+	label := widget.NewText(
+		widget.TextOpts.Text("Select Level", *assets.FontRenderer.FontBig, blue),
+		widget.TextOpts.Position(widget.TextPositionCenter, widget.TextPositionCenter),
+	)
+
+	levels := make([]any, 0, len(scene.Game.Levels))
+	for id := 0; id < len(scene.Game.Levels); id++ {
+		levels = append(levels, LevelEntry{Id: id, Name: scene.Game.Levels[id].Name})
+	}
+
+	buttonImage, err := gameui.LoadButtonImage()
+	if err != nil {
+		panic(err)
+	}
+
+	list := widget.NewList(
+		// Set how wide the list should be
+		widget.ListOpts.ContainerOpts(widget.ContainerOpts.WidgetOpts(
+			widget.WidgetOpts.MinSize(150, 0),
+			widget.WidgetOpts.LayoutData(widget.AnchorLayoutData{
+				HorizontalPosition: widget.AnchorLayoutPositionCenter,
+				VerticalPosition:   widget.AnchorLayoutPositionEnd,
+				StretchVertical:    true,
+			}),
+		)),
+		// Set the entries in the list
+		widget.ListOpts.Entries(levels),
+		widget.ListOpts.ScrollContainerOpts(
+			// Set the background images/color for the list
+			widget.ScrollContainerOpts.Image(&widget.ScrollContainerImage{
+				Idle:     image.NewNineSliceColor(color.NRGBA{100, 100, 100, 255}),
+				Disabled: image.NewNineSliceColor(color.NRGBA{100, 100, 100, 255}),
+				Mask:     image.NewNineSliceColor(color.NRGBA{100, 100, 100, 255}),
+			}),
+		),
+		widget.ListOpts.SliderOpts(
+			// Set the background images/color for the background of the slider track
+			widget.SliderOpts.Images(&widget.SliderTrackImage{
+				Idle:  image.NewNineSliceColor(color.NRGBA{100, 100, 100, 255}),
+				Hover: image.NewNineSliceColor(color.NRGBA{100, 100, 100, 255}),
+			}, buttonImage),
+			widget.SliderOpts.MinHandleSize(5),
+			// Set how wide the track should be
+			widget.SliderOpts.TrackPadding(widget.NewInsetsSimple(2))),
+		// Hide the horizontal slider
+		widget.ListOpts.HideHorizontalSlider(),
+		// Set the font for the list options
+		widget.ListOpts.EntryFontFace(*assets.FontRenderer.FontNormal),
+		// Set the colors for the list
+		widget.ListOpts.EntryColor(&widget.ListEntryColor{
+			Selected:                   color.NRGBA{0, 255, 0, 255},                 // Foreground color for the unfocused selected entry
+			Unselected:                 color.NRGBA{254, 255, 255, 255},             // Foreground color for the unfocused unselected entry
+			SelectedBackground:         color.NRGBA{R: 130, G: 130, B: 200, A: 255}, // Background color for the unfocused selected entry
+			SelectedFocusedBackground:  color.NRGBA{R: 130, G: 130, B: 170, A: 255}, // Background color for the focused selected entry
+			FocusedBackground:          color.NRGBA{R: 170, G: 170, B: 180, A: 255}, // Background color for the focused unselected entry
+			DisabledUnselected:         color.NRGBA{100, 100, 100, 255},             // Foreground color for the disabled unselected entry
+			DisabledSelected:           color.NRGBA{100, 100, 100, 255},             // Foreground color for the disabled selected entry
+			DisabledSelectedBackground: color.NRGBA{100, 100, 100, 255},             // Background color for the disabled selected entry
+		}),
+		// This required function returns the string displayed in the list
+		widget.ListOpts.EntryLabelFunc(func(e interface{}) string {
+			return e.(LevelEntry).Name
+		}),
+		// Padding for each entry
+		widget.ListOpts.EntryTextPadding(widget.NewInsetsSimple(5)),
+		// Text position for each entry
+		widget.ListOpts.EntryTextPosition(widget.TextPositionStart, widget.TextPositionCenter),
+		// This handler defines what function to run when a list item is selected.
+		widget.ListOpts.EntrySelectedHandler(func(args *widget.ListEntrySelectedEventArgs) {
+			entry := args.Entry.(LevelEntry)
+			fmt.Println("Entry Selected: ", entry)
+			gameobserver.CurrentLevel = entry.Id
+		}),
+	)
+
+	buttonPlay := gameui.NewMenuButton("Play selected level", *assets.FontRenderer.FontNormal,
 		func(args *widget.ButtonClickedEventArgs) {
 			scene.SetNext(Play)
 		})
 
-	buttonSelectLevel := gameui.NewMenuButton("Select Level", *assets.FontRenderer.FontNormal,
-		func(args *widget.ButtonClickedEventArgs) {
-			scene.SetNext(Select)
-		})
-
-	buttonAbout := gameui.NewMenuButton("About this game", *assets.FontRenderer.FontNormal,
-		func(args *widget.ButtonClickedEventArgs) {
-			scene.SetNext(About)
-		})
-
-	buttonQuit := gameui.NewMenuButton("Quit Game", *assets.FontRenderer.FontNormal,
-		func(args *widget.ButtonClickedEventArgs) {
-			os.Exit(1) // FIXME: present another scene "are you sure and/or thank you"
-		})
-
-	label := widget.NewText(
-		widget.TextOpts.Text("Menu", *assets.FontRenderer.FontBig, blue),
-		widget.TextOpts.Position(widget.TextPositionCenter, widget.TextPositionCenter),
-	)
-
 	rowContainer.AddChild(label)
-	rowContainer.AddChild(buttonStartnew)
-	rowContainer.AddChild(buttonSelectLevel)
-	rowContainer.AddChild(buttonAbout)
-	rowContainer.AddChild(buttonQuit)
+	rowContainer.AddChild(list)
+	rowContainer.AddChild(buttonPlay)
 
 	scene.Ui = &ebitenui.UI{
 		Container: rowContainer.Container(),

game/welcome_scene.go

@@ -36,10 +36,14 @@ func (scene *WelcomeScene) ResetNext() {
 	scene.Next = scene.Whoami
 }
 
+func (scene *WelcomeScene) Clearscreen() bool {
+	return true
+}
+
 func (scene *WelcomeScene) Update() error {
 	switch {
 	case ebiten.IsKeyPressed(ebiten.KeyEnter):
-		scene.SetNext(Select)
+		scene.SetNext(Menu)
 	}
 
 	scene.Ui.Update()
@@ -60,7 +64,7 @@ func (scene *WelcomeScene) SetupUI() {
 
 	button := gameui.NewMenuButton("Start", *assets.FontRenderer.FontNormal,
 		func(args *widget.ButtonClickedEventArgs) {
-			scene.SetNext(Select)
+			scene.SetNext(Menu)
 		})
 
 	label := widget.NewText(

gameui/widgets.go

@@ -52,14 +52,24 @@ func (container *RowContainer) Container() *widget.Container {
 	return container.Root
 }
 
-func NewRowContainer() *RowContainer {
+// set arg to false if no background needed
+func NewRowContainer(setbackground ...bool) *RowContainer {
 	background := assets.Assets["background-lila"]
+	var uiContainer *widget.Container
 
-	uiContainer := widget.NewContainer(
-		widget.ContainerOpts.BackgroundImage(
-			image.NewNineSlice(background, [3]int{0, 1, 639}, [3]int{0, 1, 479})),
-		widget.ContainerOpts.Layout(widget.NewAnchorLayout()),
-	)
+	if len(setbackground) > 0 {
+		// false
+		uiContainer = widget.NewContainer(
+			widget.ContainerOpts.Layout(widget.NewAnchorLayout()),
+		)
+	} else {
+		// default: true
+		uiContainer = widget.NewContainer(
+			widget.ContainerOpts.BackgroundImage(
+				image.NewNineSlice(background, [3]int{0, 1, 639}, [3]int{0, 1, 479})),
+			widget.ContainerOpts.Layout(widget.NewAnchorLayout()),
+		)
+	}
 
 	rowContainer := widget.NewContainer(
 		widget.ContainerOpts.WidgetOpts(