Added Presets

main.go

@@ -5,6 +5,7 @@ import (
 	"archive/zip"
 	"bytes"
 	"compress/gzip"
+	"embed"
 	"encoding/json"
 	"fmt"
 	"image"
@@ -13,9 +14,11 @@ import (
 	"image/jpeg"
 	"image/png"
 	"io"
+	"io/fs"
 	"log"
 	"os"
 	"path/filepath"
+	"sort"
 	"strconv"
 	"strings"
 	"time"
@@ -33,6 +36,9 @@ import (
 
 const generationStepTimeout = time.Minute
 
+//go:embed Presets/*.json
+var embeddedPresets embed.FS
+
 func runWithTimeout[T any](timeout time.Duration, fn func() T) (T, bool) {
 	ch := make(chan T, 1)
 	go func() {
@@ -61,6 +67,45 @@ func cloneToRGBA(src image.Image, width, height int) *image.RGBA {
 	return out
 }
 
+type presetEntry struct {
+	Name string
+	Path string
+}
+
+func listEmbeddedPresets() ([]presetEntry, error) {
+	entries, err := fs.ReadDir(embeddedPresets, "Presets")
+	if err != nil {
+		return nil, err
+	}
+	var presets []presetEntry
+	for _, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+		name := entry.Name()
+		if !strings.HasSuffix(strings.ToLower(name), ".json") {
+			continue
+		}
+		displayName := strings.TrimSuffix(name, filepath.Ext(name))
+		presets = append(presets, presetEntry{
+			Name: displayName,
+			Path: filepath.Join("Presets", name),
+		})
+	}
+	sort.Slice(presets, func(i, j int) bool {
+		return presets[i].Name < presets[j].Name
+	})
+	return presets, nil
+}
+
+func loadEmbeddedPreset(path string) (*Settings, error) {
+	raw, err := embeddedPresets.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	return decodeSettingsJSON(raw)
+}
+
 func main() {
 	// Initialize the Fyne application and window
 	a := app.NewWithID("com.example.rpgcitymaker")
@@ -1549,6 +1594,34 @@ func main() {
 		updateGenerateBtnState()
 	}
 
+	presetEntries, err := listEmbeddedPresets()
+	if err != nil {
+		log.Println("Error loading embedded presets:", err)
+	}
+	presetNames := []string{"No Preset"}
+	presetPathByName := map[string]string{}
+	for _, preset := range presetEntries {
+		presetNames = append(presetNames, preset.Name)
+		presetPathByName[preset.Name] = preset.Path
+	}
+	presetSelect := widget.NewSelect(presetNames, func(name string) {
+		if name == "" || name == "No Preset" {
+			return
+		}
+		path, ok := presetPathByName[name]
+		if !ok {
+			return
+		}
+		imported, err := loadEmbeddedPreset(path)
+		if err != nil {
+			dialog.ShowError(err, w)
+			return
+		}
+		imported.Seed = settings.Seed
+		applySettingsToUI(imported)
+	})
+	presetSelect.SetSelected("No Preset")
+
 	buildingsTab := container.NewTabItem("Buildings", container.NewVBox(
 		numBuildingsSlider,
 		minBuildingSizeSlider,
@@ -1561,6 +1634,9 @@ func main() {
 	))
 
 	imageTab := container.NewTabItem("Image", container.NewVBox(
+		widget.NewLabel("Preset:"),
+		presetSelect,
+		widget.NewSeparator(),
 		widget.NewLabel("Width:"),
 		widthEntry, widget.NewLabel("Height:"),
 		heightEntry,