Choose map projection in settings

app/src/main/java/net/helcel/beans/activity/MainActivity.kt

@@ -24,6 +24,7 @@ class MainActivity : AppCompatActivity() {
     private lateinit var css: CSSWrapper
 
     override fun onRestart() {
+        refreshProjection()
         refreshMap()
         super.onRestart()
     }
@@ -50,7 +51,6 @@ class MainActivity : AppCompatActivity() {
         Settings.start(this)
         supportActionBar?.setBackgroundDrawable(colorWrapper(this, android.R.attr.colorPrimary))
 
-
         setContentView(_binding.root)
 
         _binding.photoView.minimumScale = 1f
@@ -58,9 +58,8 @@ class MainActivity : AppCompatActivity() {
 
         GeoLocImporter.importStates(this)
         Data.loadData(this, Int.MIN_VALUE)
-        psvg = SVGWrapper(this)
-        css = CSSWrapper(this)
 
+        refreshProjection()
         refreshMap()
     }
 
@@ -70,4 +69,9 @@ class MainActivity : AppCompatActivity() {
         _binding.photoView.setImageDrawable(PictureDrawable(psvg.get()?.renderToPicture(opt)))
     }
 
+    fun refreshProjection() {
+        psvg = SVGWrapper(this)
+        css = CSSWrapper(this)
+    }
+
 }

app/src/main/java/net/helcel/beans/activity/fragment/SettingsFragment.kt

@@ -7,9 +7,11 @@ import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import androidx.preference.PreferenceManager
 import net.helcel.beans.R
+import net.helcel.beans.activity.MainActivity
 import net.helcel.beans.countries.GeoLocImporter
 import net.helcel.beans.helper.Data
 import net.helcel.beans.helper.DialogCloser
+import net.helcel.beans.helper.Settings
 
 
 class SettingsFragment : PreferenceFragmentCompat(), DialogCloser {
@@ -28,6 +30,11 @@ class SettingsFragment : PreferenceFragmentCompat(), DialogCloser {
             setTheme(ctx, key as String)
         }
 
+        // Select map projection
+        findPreference<Preference>(getString(R.string.key_projection))?.setOnPreferenceChangeListener { _, key ->
+            Settings.refreshProjection()
+        }
+
         // Toggle groups
         findPreference<Preference>(getString(R.string.key_group))?.setOnPreferenceChangeListener { _, key ->
             if (key as String == ctx.getString(R.string.off)) {
@@ -42,7 +49,6 @@ class SettingsFragment : PreferenceFragmentCompat(), DialogCloser {
             }
         }
 
-
         // Toggle regional geolocs
         findPreference<Preference>(getString(R.string.key_regional))?.setOnPreferenceChangeListener { _, key ->
             when (key as String) {

app/src/main/java/net/helcel/beans/helper/Settings.kt

@@ -4,12 +4,15 @@ import android.content.Context
 import android.content.SharedPreferences
 import androidx.preference.PreferenceManager
 import net.helcel.beans.R
+import net.helcel.beans.activity.MainActivity
 import net.helcel.beans.activity.fragment.SettingsFragment
 
 object Settings {
 
     private lateinit var sp: SharedPreferences
-    fun start(ctx: Context) {
+    private lateinit var mainActivity: MainActivity
+    fun start(ctx: MainActivity) {
+        mainActivity = ctx
         sp = PreferenceManager.getDefaultSharedPreferences(ctx)
         SettingsFragment.setTheme(
             ctx, sp.getString(ctx.getString(R.string.key_theme), ctx.getString(R.string.system))
@@ -37,6 +40,11 @@ object Settings {
         )
     }
 
+    fun refreshProjection(): Boolean {
+        mainActivity.refreshProjection()
+        return true
+    }
+
     private fun getBooleanValue(ctx: Context, key: String?): Boolean {
         return when (key) {
             ctx.getString(R.string.on) -> true

app/src/main/java/net/helcel/beans/svg/SVGWrapper.kt

@@ -1,11 +1,24 @@
 package net.helcel.beans.svg
 
 import android.content.Context
+import androidx.preference.PreferenceManager
 import com.caverock.androidsvg.SVG
+import net.helcel.beans.R
 
 class SVGWrapper(ctx: Context) {
 
-    private var svg: SVG? = SVG.getFromAsset(ctx.assets, "webmercator01.svg")
+    val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(ctx)
+    val svgFile = when (sharedPreferences.getString(ctx.getString(R.string.key_projection), ctx.getString(R.string.mercator))) {
+        ctx.getString(R.string.azimuthalequidistant) -> "aeqd01.svg"
+        ctx.getString(R.string.equirectangular) -> "eqdc01.svg"
+        ctx.getString(R.string.equidistant) -> "eqearth01.svg"
+        ctx.getString(R.string.mercator) -> "mercator01.svg"
+        ctx.getString(R.string.loximuthal) -> "loxim01.svg"
+        ctx.getString(R.string.webmercator) -> "webmercator01.svg"
+        else -> "webmercator01.svg"
+    }
+
+    private var svg: SVG? = SVG.getFromAsset(ctx.assets, svgFile)
 
     fun get(): SVG? {
         return svg