frontend: UI refactoring

- moved ui code to seperate file
- added a simple wrapper over ebitenui.UI to allow storage of colors
and such

Hopefully this makes it possible for colors to be changed by users in
the future

frontend/main.go

@@ -1,10 +1,6 @@
 package main
 
 import (
-	// Image-related packages
-	img "image"
-	"image/color"
-
 	// Random
 	"math/rand"
 
@@ -12,76 +8,29 @@ import (
 	"log"
 
 	// Ebitengine
-	"github.com/ebitenui/ebitenui"
-	"github.com/ebitenui/ebitenui/image"
-	"github.com/ebitenui/ebitenui/widget"
 	"github.com/hajimehoshi/ebiten/v2"
 )
 
 // Create the `Game` struct
 type Game struct {
-	ui ebitenui.UI
+	ui UI
 }
 
-// Function for UI initialization
+const (
-func uiInit() ebitenui.UI {
+	window_width = 640
-	// The `hazakura` colorscheme
+	window_height = 480
-	hazakura := make(map[string]color.RGBA)
+)
-	// The monotone colors
-	hazakura["dark_black"] = color.RGBA{0x0f, 0x0f, 0x0d, 0xff}
-	hazakura["black"] = color.RGBA{0x15, 0x15, 0x17, 0xff}
-	hazakura["dark_gray"] = color.RGBA{0x24, 0x24, 0x26, 0xff}
-	hazakura["gray"] = color.RGBA{0x27, 0x27, 0x2b, 0xff}
-	hazakura["light_gray"] = color.RGBA{0x45, 0x44, 0x49, 0xff}
-	hazakura["overlay"] = color.RGBA{0x5c, 0x5c, 0x61, 0xff}
-	hazakura["highlight"] = color.RGBA{0xd9, 0x0, 0xd7, 0xff}
-	hazakura["subwhite"] = color.RGBA{0xec, 0xe5, 0xea, 0xff}
-
-	// Actual* colors
-	hazakura["red"] = color.RGBA{0xf0, 0x69, 0x69, 0xff}
-	hazakura["magenta"] = color.RGBA{0xe8, 0x87, 0xbb, 0xff}
-	hazakura["purple"] = color.RGBA{0xa2, 0x92, 0xe8, 0xff}
-	hazakura["blue"] = color.RGBA{0x78, 0xb9, 0xc4, 0xff}
-	hazakura["cyan"] = color.RGBA{0x7e, 0xe6, 0xae, 0xff}
-	hazakura["green"] = color.RGBA{0x91, 0xd6, 0x5c, 0xff}
-	hazakura["yellow"] = color.RGBA{0xd9, 0xd5, 0x64, 0xff}
-
-	// Get the window width/height
-	window_width, window_height := ebiten.WindowSize()
-
-	// Define the root container
-	root := widget.NewContainer(
-		// Define the plain color to be used as a default background
-		widget.ContainerOpts.BackgroundImage(image.NewNineSliceColor(hazakura["dark_black"])),
-	)
-
-	// Define the left bar container
-	leftBar := widget.NewContainer(
-		widget.ContainerOpts.BackgroundImage(image.NewNineSliceColor(hazakura["gray"])),
-	)
-	// Set the position and size of the left bar
-	leftBar.SetLocation(img.Rect(0, 0, int(float64(window_width)/3.5), window_height))
-	// Add the left bar to the root container
-	root.AddChild(leftBar)
-
-	// Construct the UI
-	ui := ebitenui.UI{
-		Container: root,
-	}
-
-	return ui
-}
 
 // Update implements Game
 func (g *Game) Update() error {
-	g.ui.Update()
+	g.ui.base.Update()
 	return nil
 }
 
 // Draw implements Game
 func (g *Game) Draw(screen *ebiten.Image) {
 	// Draw the UI onto the screen
-	g.ui.Draw(screen)
+	g.ui.base.Draw(screen)
 }
 
 // Layout implements Game
@@ -102,13 +51,13 @@ func main() {
 	window_title := "Ambition: " + window_titles[rand.Intn(len(window_titles))]
 
 	// Engine setup
-	ebiten.SetWindowSize(640, 480)
+	ebiten.SetWindowSize(window_width, window_height)
 	ebiten.SetWindowTitle(window_title)
 
 	// Initialise the game
 	game := Game{
 		// Initialise the UI
-		ui: uiInit(),
+		ui: uiInit(window_width, window_height),
 	}
 
 	// Log and exit on error

frontend/ui.go

@@ -0,0 +1,70 @@
+package main
+
+import (
+	// Image-related packages
+	img "image"
+	"image/color"
+
+	// EbitenUI
+	"github.com/ebitenui/ebitenui"
+	"github.com/ebitenui/ebitenui/image"
+	"github.com/ebitenui/ebitenui/widget"
+)
+
+type UI struct {
+	base   ebitenui.UI
+	colors map[string]color.RGBA
+	width, height int
+}
+
+// Function for UI initialization
+func uiInit(width, height int) UI {
+	var ui UI
+	// The `hazakura` colorscheme
+	{
+		hazakura := make(map[string]color.RGBA)
+		// The monotone colors
+		hazakura["dark_black"] = color.RGBA{0x0f, 0x0f, 0x0d, 0xff}
+		hazakura["black"] = color.RGBA{0x15, 0x15, 0x17, 0xff}
+		hazakura["dark_gray"] = color.RGBA{0x24, 0x24, 0x26, 0xff}
+		hazakura["gray"] = color.RGBA{0x27, 0x27, 0x2b, 0xff}
+		hazakura["light_gray"] = color.RGBA{0x45, 0x44, 0x49, 0xff}
+		hazakura["overlay"] = color.RGBA{0x5c, 0x5c, 0x61, 0xff}
+		hazakura["highlight"] = color.RGBA{0xd9, 0x0, 0xd7, 0xff}
+		hazakura["subwhite"] = color.RGBA{0xec, 0xe5, 0xea, 0xff}
+
+		// Actual* colors
+		hazakura["red"] = color.RGBA{0xf0, 0x69, 0x69, 0xff}
+		hazakura["magenta"] = color.RGBA{0xe8, 0x87, 0xbb, 0xff}
+		hazakura["purple"] = color.RGBA{0xa2, 0x92, 0xe8, 0xff}
+		hazakura["blue"] = color.RGBA{0x78, 0xb9, 0xc4, 0xff}
+		hazakura["cyan"] = color.RGBA{0x7e, 0xe6, 0xae, 0xff}
+		hazakura["green"] = color.RGBA{0x91, 0xd6, 0x5c, 0xff}
+		hazakura["yellow"] = color.RGBA{0xd9, 0xd5, 0x64, 0xff}
+
+		ui.colors = hazakura
+	}
+
+	// Get the window width/height
+	ui.width = width
+	ui.height = height
+
+	// Define the root container
+	root := widget.NewContainer(
+		// Define the plain color to be used as a default background
+		widget.ContainerOpts.BackgroundImage(image.NewNineSliceColor(ui.colors["dark_black"])),
+	)
+
+	// Define the left bar container
+	leftBar := widget.NewContainer(
+		widget.ContainerOpts.BackgroundImage(image.NewNineSliceColor(ui.colors["gray"])),
+	)
+	// Set the position and size of the left bar
+	leftBar.SetLocation(img.Rect(0, 0, int(float64(width)/3.5), height))
+	// Add the left bar to the root container
+	root.AddChild(leftBar)
+
+	ui.base.Container = root
+
+	return ui
+}