Level Exit Doodad

* Add a Level Exit doodad, which for now is a little blue flag on a pole
  that reads "END"
* JavaScript API: global function EndLevel() will end the level. The
  exit doodad calls this when touched by the player.
* Add a "Level Completed" alert box UI to PlayScene with dynamic button
  layouts.
  * The alert box pops up when a doodad calls EndLevel() and contains
    action buttons what to do next.
  * "Play Again" restarts the current level again.
  * "Edit Level" if you came from the EditorScene; otherwise this button
    is not visible.
  * "Next Level" is a to-be-implemented button to advance in the single
    player story mode. Only shows up when PlayScene.HasNext=true.
  * "Exit to Menu" is always visible and closes out to the MainScene.

dev-assets/doodads/build.sh

@@ -86,7 +86,19 @@ azulians() {
 	cd ..
 }
 
+objects() {
+	cd objects/
+
+	doodad convert -t "Exit Flag" exit-flag.png exit-flag.doodad
+	doodad install-script exit-flag.js exit-flag.doodad
+
+	cp *.doodad ../../../assets/doodads/
+
+	cd ..
+}
+
 buttons
 doors
 trapdoors
 azulians
+objects

dev-assets/doodads/objects/exit-flag.js

@@ -0,0 +1,11 @@
+// Exit Flag.
+function main() {
+	console.log("%s initialized!", Self.Doodad.Title);
+	Self.SetHitbox(22+16, 16, 75-16, 86);
+
+	Events.OnCollide(function(e) {
+		if (e.InHitbox) {
+			EndLevel();
+		}
+	});
+}

pkg/doodle.go

@@ -2,6 +2,7 @@ package doodle
 
 import (
 	"fmt"
+	"path/filepath"
 	"strings"
 	"time"
 
@@ -223,11 +224,7 @@ func (d *Doodle) NewDoodad(size int) {
 // EditDrawing loads a drawing (Level or Doodad) in Edit Mode.
 func (d *Doodle) EditDrawing(filename string) error {
 	log.Info("Loading drawing from file: %s", filename)
-	parts := strings.Split(filename, ".")
+	ext := strings.ToLower(filepath.Ext(filename))
-	if len(parts) < 2 {
-		return fmt.Errorf("filename `%s` has no file extension", filename)
-	}
-	ext := strings.ToLower(parts[len(parts)-1])
 
 	scene := &EditorScene{
 		Filename: filename,
@@ -235,11 +232,11 @@ func (d *Doodle) EditDrawing(filename string) error {
 	}
 
 	switch ext {
-	case "level":
+	case ".level":
-	case "map":
+	case ".map":
 		log.Info("is a Level type")
 		scene.DrawingType = enum.LevelDrawing
-	case "doodad":
+	case ".doodad":
 		if balance.FreeVersion {
 			return fmt.Errorf("Doodad editor not supported in your version of the game")
 		}

pkg/editor_scene.go

@@ -131,6 +131,7 @@ func (s *EditorScene) Playtest() {
 	s.d.Goto(&PlayScene{
 		Filename: s.filename,
 		Level:    s.Level,
+		CanEdit:  true,
 	})
 }
 
@@ -167,7 +168,7 @@ func (s *EditorScene) Loop(d *Doodle, ev *events.State) error {
 // Draw the current frame.
 func (s *EditorScene) Draw(d *Doodle) error {
 	// Clear the canvas and fill it with magenta so it's clear if any spots are missed.
-	d.Engine.Clear(render.Magenta)
+	d.Engine.Clear(render.RGBA(160, 120, 160, 255))
 
 	s.UI.Present(d.Engine)
 

pkg/editor_ui.go

@@ -148,6 +148,7 @@ func (u *EditorUI) Resized(d *Doodle) {
 
 	// Position the workspace around with the other widgets.
 	{
+
 		frame := u.Workspace
 		frame.MoveTo(render.NewPoint(
 			0,

pkg/play_scene.go

@@ -19,16 +19,27 @@ type PlayScene struct {
 	// Configuration attributes.
 	Filename string
 	Level    *level.Level
+	CanEdit  bool // i.e. you came from the Editor Mode
+	HasNext  bool // has a next level to load next
 
 	// Private variables.
 	d         *Doodle
 	drawing   *uix.Canvas
 	scripting *scripting.Supervisor
+	running   bool
 
 	// UI widgets.
 	supervisor *ui.Supervisor
 	editButton *ui.Button
 
+	// The alert box shows up when the level goal is reached and includes
+	// buttons what to do next.
+	alertBox          *ui.Window
+	alertReplayButton *ui.Button // Replay level
+	alertEditButton   *ui.Button // Edit Level
+	alertNextButton   *ui.Button // Next Level
+	alertExitButton   *ui.Button // Exit to menu
+
 	// Custom debug labels.
 	debPosition   *string
 	debViewport   *string
@@ -50,6 +61,30 @@ func (s *PlayScene) Setup(d *Doodle) error {
 	s.scripting = scripting.NewSupervisor()
 	s.supervisor = ui.NewSupervisor()
 
+	// Level Exit handler.
+	s.SetupAlertbox()
+	s.scripting.OnLevelExit(func() {
+		d.Flash("Hurray!")
+
+		// Pause the simulation.
+		s.running = false
+
+		// Toggle the relevant buttons on.
+		if s.CanEdit {
+			s.alertEditButton.Show()
+		}
+		if s.HasNext {
+			s.alertNextButton.Show()
+		}
+
+		// Always-visible buttons.
+		s.alertReplayButton.Show()
+		s.alertExitButton.Show()
+
+		// Show the alert box.
+		s.alertBox.Show()
+	})
+
 	// Initialize debug overlay values.
 	s.debPosition = new(string)
 	s.debViewport = new(string)
@@ -126,10 +161,90 @@ func (s *PlayScene) Setup(d *Doodle) error {
 	}
 
 	d.Flash("Entered Play Mode. Press 'E' to edit this map.")
+	s.running = true
 
 	return nil
 }
 
+// SetupAlertbox configures the alert box UI.
+func (s *PlayScene) SetupAlertbox() {
+	window := ui.NewWindow("Level Completed")
+	window.Configure(ui.Config{
+		Width:      320,
+		Height:     160,
+		Background: render.Grey,
+	})
+	window.Compute(s.d.Engine)
+
+	{
+		frame := ui.NewFrame("Open Drawing Frame")
+		window.Pack(frame, ui.Pack{
+			Anchor: ui.N,
+			Fill:   true,
+			Expand: true,
+		})
+
+		/******************
+		 * Frame for selecting User Levels
+		 ******************/
+
+		label1 := ui.NewLabel(ui.Label{
+			Text: "Congratulations on clearing the level!",
+			Font: balance.LabelFont,
+		})
+		frame.Pack(label1, ui.Pack{
+			Anchor: ui.N,
+			FillX:  true,
+			PadY:   16,
+		})
+
+		/******************
+		 * Confirm/cancel buttons.
+		 ******************/
+
+		bottomFrame := ui.NewFrame("Button Frame")
+		frame.Pack(bottomFrame, ui.Pack{
+			Anchor: ui.N,
+			FillX:  true,
+			PadY:   8,
+		})
+
+		// Button factory for the various options.
+		makeButton := func(text string, handler func()) *ui.Button {
+			btn := ui.NewButton(text, ui.NewLabel(ui.Label{
+				Font: balance.LabelFont,
+				Text: text,
+			}))
+			btn.Handle(ui.Click, func(p render.Point) {
+				handler()
+			})
+			bottomFrame.Pack(btn, ui.Pack{
+				Anchor: ui.W,
+				PadX:   2,
+			})
+			s.supervisor.Add(btn)
+			btn.Hide() // all buttons hidden by default
+			return btn
+		}
+
+		s.alertReplayButton = makeButton("Play Again", func() {
+			s.RestartLevel()
+		})
+		s.alertEditButton = makeButton("Edit Level", func() {
+			s.EditLevel()
+		})
+		s.alertNextButton = makeButton("Next Level", func() {
+			s.d.Flash("Not Implemented")
+		})
+		s.alertExitButton = makeButton("Exit to Menu", func() {
+			s.d.Goto(&MainScene{})
+		})
+	}
+
+	s.alertBox = window
+	s.alertBox.Hide()
+}
+
 // EditLevel toggles out of Play Mode to edit the level.
 func (s *PlayScene) EditLevel() {
 	log.Info("Edit Mode, Go!")
@@ -139,6 +254,16 @@ func (s *PlayScene) EditLevel() {
 	})
 }
 
+// RestartLevel starts the level over again.
+func (s *PlayScene) RestartLevel() {
+	log.Info("Restart Level")
+	s.d.Goto(&PlayScene{
+		Filename: s.Filename,
+		Level:    s.Level,
+		CanEdit:  s.CanEdit,
+	})
+}
+
 // Loop the editor scene.
 func (s *PlayScene) Loop(d *Doodle, ev *events.State) error {
 	// Update debug overlay values.
@@ -166,6 +291,8 @@ func (s *PlayScene) Loop(d *Doodle, ev *events.State) error {
 		return nil
 	}
 
+	// Is the simulation still running?
+	if s.running {
 		// Loop the script supervisor so timeouts/intervals can fire in scripts.
 		if err := s.scripting.Loop(); err != nil {
 			log.Error("PlayScene.Loop: scripting.Loop: %s", err)
@@ -175,6 +302,7 @@ func (s *PlayScene) Loop(d *Doodle, ev *events.State) error {
 		if err := s.drawing.Loop(ev); err != nil {
 			log.Error("Drawing loop error: %s", err.Error())
 		}
+	}
 
 	return nil
 }
@@ -201,6 +329,16 @@ func (s *PlayScene) Draw(d *Doodle) error {
 		Y: canSize.H - size.H - padding,
 	})
 
+	// Draw the alert box window.
+	if !s.alertBox.Hidden() {
+		s.alertBox.Compute(d.Engine)
+		s.alertBox.MoveTo(render.Point{
+			X: int32(d.width/2) - (s.alertBox.Size().W / 2),
+			Y: int32(d.height/2) - (s.alertBox.Size().H / 2),
+		})
+		s.alertBox.Present(d.Engine, s.alertBox.Point())
+	}
+
 	return nil
 }
 
@@ -248,14 +386,14 @@ func (s *PlayScene) Drawing() *uix.Canvas {
 func (s *PlayScene) LoadLevel(filename string) error {
 	s.Filename = filename
 
-	level, err := level.LoadJSON(filename)
+	level, err := level.LoadFile(filename)
 	if err != nil {
 		return fmt.Errorf("PlayScene.LoadLevel(%s): %s", filename, err)
 	}
 
 	s.Level = level
 	s.drawing.LoadLevel(s.d.Engine, s.Level)
-	// s.drawing.InstallActors(s.Level.Actors)
+	s.drawing.InstallActors(s.Level.Actors)
 
 	return nil
 }

pkg/scripting/scripting.go

@@ -15,6 +15,9 @@ import (
 // unique ID.
 type Supervisor struct {
 	scripts map[string]*VM
+
+	// Global event handlers.
+	onLevelExit func()
 }
 
 // NewSupervisor creates a new JavaScript Supervior.
@@ -67,6 +70,7 @@ func (s *Supervisor) AddLevelScript(id string) error {
 
 	s.scripts[id] = NewVM(id)
 	RegisterPublishHooks(s.scripts[id])
+	RegisterEventHooks(s, s.scripts[id])
 	if err := s.scripts[id].RegisterLevelHooks(); err != nil {
 		return err
 	}

pkg/scripting/supervisor_events.go

@@ -0,0 +1,23 @@
+package scripting
+
+/*
+RegisterEventHooks attaches the supervisor level event hooks into a JS VM.
+
+Names registered:
+
+- EndLevel(): for a doodad to exit the level. Panics if the OnLevelExit
+  handler isn't defined.
+*/
+func RegisterEventHooks(s *Supervisor, vm *VM) {
+	vm.Set("EndLevel", func() {
+		if s.onLevelExit == nil {
+			panic("JS EndLevel(): no OnLevelExit handler attached to script supervisor")
+		}
+		s.onLevelExit()
+	})
+}
+
+// OnLevelExit registers an event hook for when a Level Exit doodad is reached.
+func (s *Supervisor) OnLevelExit(handler func()) {
+	s.onLevelExit = handler
+}