App 2.27.1: accent colour only for styles drawn in it

Settings → Display now has the Overview style first with the accent
colour beside it; for styles with their own palette the accent field is
greyed out with a note. Styles are an enum, OverviewStyle, with
usesAccent (unit-tested). Emulator only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LhzAVaUyqcw5PkGjz4mWW6

AGENTS.md

@@ -73,7 +73,7 @@ Repository: `ssh://git@git.stinnesbeck.com:2222/nils/mg4.git` (remote `origin`),
 | Consumption / Charging | period totals, daily log, charging sessions and curve |
 | Live data | on/off, ABRP API key and user token, upload frequency |
 | Server | URL, pairing by QR, ingest token, installation ID (read-only), config import |
-| Settings | full screen, voice key, tyre unit, accent colour, Overview style, battery, charging price, version, update check, install from USB, About |
+| Settings | full screen, voice key, Overview style with the accent colour beside it (offered only for styles drawn in it, `OverviewStyle.usesAccent`), tyre unit, battery, charging price, version, update check, install from USB, About |
 | Logs | update log (every install step, with the platform's words), upload log |
 
 Key classes (`app/src/main/java/com/evsuite/abrp/`): `AbrpUploadService` (foreground service,

SPECS.md

@@ -131,6 +131,18 @@ tyre pressures, GPS (lat, lon, elevation, heading) and the is_* flags. It does *
   confirmed car facts, app structure, UI conventions, build/test/ship, documents. It replaces
   upstream's EVABRPUploader text. The test emulator is now in the flake: `nix run .#car-emulator`
   (Android 9 AOSP at 1920×720, 160 dpi; the car build installs as the system user — checked).
+- 2026-10-24 — App 2.27.1 (branch `styles-retro-future`): Settings → Display rearranged:
+  Overview style first, the accent colour beside it, tyre pressure on its own row below. The
+  accent colour is only offered for styles drawn in it (Tiles, Gauges, Cockpit, Retro (accent
+  colour), Futuristic, MG, Minimal, Chronograph); for the styles with their own palette (Retro,
+  Sci-fi, Cartoon, Blueprint, Terminal, Aviation, Nixie tubes) the field is greyed out and
+  ignores taps, keeping the colour chosen before, and a line says "… has its own colours. To
+  change the accent colour, pick a style that uses it." The styles are now an enum,
+  `OverviewStyle` (stored names, `usesAccent`, the old `DASHBOARD` value; unit-tested), in place
+  of the string array. The style list is wider than its field so "Retro (accent colour)" fits.
+  Checked on the emulator: Tiles (accent open), Cartoon (greyed, tap ignored, note), back to
+  Tiles; the page fits without scrolling
+  (`screenshots/nilsmg4-2.27.1-settings-own-colours.png`). Not tried on the car.
 - 2026-10-24 — App 2.27.0 (branch `styles-retro-future`): the Overview can go full width. A
   small round button in its top-right corner (40 dp disc in a 72 dp touch area, over the pages)
   hides the app's navigation (sidebar, or the bottom bar on narrow screens); its icon turns to

app/build.gradle

@@ -34,8 +34,8 @@ android {
         applicationId "com.stinnesbeck.nilsmg4"
         minSdk 27
         targetSdk 36
-        versionCode 121
+        versionCode 122
-        versionName "2.27.0"
+        versionName "2.27.1"
 
         // Nothing about the server ships in the APK: its URL and ingest token are entered in
         // the app's Server tab (ServerConfig), and the database is only reachable by the server.

app/src/main/java/com/evsuite/abrp/MainActivity.java

@@ -68,7 +68,7 @@ public class MainActivity extends AppCompatActivity {
     private OctagonView octagonView;
     /** The styles built on {@link ClusterCanvasView}, fed together. */
     private final java.util.List<ClusterCanvasView> canvasStyles = new java.util.ArrayList<>();
-    /** The pane of each Overview style, by its index in {@link #OVERVIEW_STYLES}. */
+    /** The pane of each Overview style, by its {@link OverviewStyle} ordinal. */
     private View[] stylePanes;
     private View consumptionPane;
     private View chargingPane;
@@ -1226,6 +1226,7 @@ public class MainActivity extends AppCompatActivity {
             prefs.edit().putString(AccentColor.PREF_KEY, colors[position].name()).apply();
             recreate();
         });
+        applyAccentAvailability();
     }
 
     /** Tyre pressure unit: display only, read on every refresh of the Overview. */
@@ -1479,35 +1480,45 @@ public class MainActivity extends AppCompatActivity {
 
     // ---------- Gauges (Overview style) ----------
 
-    static final String PREF_OVERVIEW_STYLE = "overview_style";
+    static final String PREF_OVERVIEW_STYLE = OverviewStyle.PREF_KEY;
     private GaugeView dashPower, dashSpeed, dashBattery;
     private BatteryBarView dashBatteryBar;
     private TextView dashGear, dashClimate, dashUsage, dashBatteryText;
     /** Kilometres since start, from the range estimator; null until it has a distance. */
     private Double dashTripKm;
 
-    /** The stored values of the Overview styles, in the order of the drop-down. */
+    private OverviewStyle overviewStyle() {
-    private static final String[] OVERVIEW_STYLES = { "TILES", "GAUGES", "COCKPIT", "RETRO", "RETRO_ACCENT", "FUTURISTIC",
+        return OverviewStyle.fromPref(prefs.getString(PREF_OVERVIEW_STYLE, null));
-            "SCIFI", "CARTOON", "BLUEPRINT", "MG", "MINIMAL", "TERMINAL", "AVIATION", "NIXIE", "CHRONOGRAPH" };
-
-    /** The chosen style's index in {@link #OVERVIEW_STYLES}; anything unknown is Tiles. */
-    private int overviewStyle() {
-        String style = prefs.getString(PREF_OVERVIEW_STYLE, "TILES");
-        if ("DASHBOARD".equals(style)) style = "GAUGES"; // its name before 2.22.3
-        for (int i = 0; i < OVERVIEW_STYLES.length; i++) if (OVERVIEW_STYLES[i].equals(style)) return i;
-        return 0;
     }
 
     private void applyOverviewStyle() {
-        int style = overviewStyle();
+        OverviewStyle style = overviewStyle();
-        for (View pane : stylePanes) pane.setVisibility(pane == stylePanes[style] ? View.VISIBLE : View.GONE);
+        for (View pane : stylePanes) pane.setVisibility(pane == stylePanes[style.ordinal()] ? View.VISIBLE : View.GONE);
         // Retro in either palette: one pane, the view told which.
-        retroView.setAccentPalette("RETRO_ACCENT".equals(OVERVIEW_STYLES[style]));
+        retroView.setAccentPalette(style == OverviewStyle.RETRO_ACCENT);
+        applyAccentAvailability();
     }
 
-    /** The style drop-down; every style is fed on every reading, only the chosen one is shown. */
+    /**
-    private void bindOverviewStyle() {
+     * The accent colour can only be picked for a style drawn in it; for the others the drop-down
-        String[] labels = { getString(R.string.overview_style_tiles), getString(R.string.overview_style_gauges),
+     * is greyed out (keeping the colour chosen before) and a line says why.
+     */
+    private void applyAccentAvailability() {
+        if (settingsPane == null) return;
+        OverviewStyle style = overviewStyle();
+        View field = settingsPane.findViewById(R.id.accent_field);
+        if (field == null) return;
+        field.setEnabled(style.usesAccent);
+        settingsPane.findViewById(R.id.accent_choices).setEnabled(style.usesAccent);
+        field.setAlpha(style.usesAccent ? 1f : 0.45f);
+        TextView note = settingsPane.findViewById(R.id.accent_note);
+        note.setVisibility(style.usesAccent ? View.GONE : View.VISIBLE);
+        note.setText(getString(R.string.accent_not_used, styleLabels()[style.ordinal()]));
+    }
+
+    /** The drop-down's labels, by {@link OverviewStyle} ordinal. */
+    private String[] styleLabels() {
+        return new String[] { getString(R.string.overview_style_tiles), getString(R.string.overview_style_gauges),
                 getString(R.string.overview_style_cockpit), getString(R.string.overview_style_retro),
                 getString(R.string.overview_style_retro_accent), getString(R.string.overview_style_futuristic),
                 getString(R.string.overview_style_scifi), getString(R.string.overview_style_cartoon),
@@ -1515,9 +1526,18 @@ public class MainActivity extends AppCompatActivity {
                 getString(R.string.overview_style_minimal), getString(R.string.overview_style_terminal),
                 getString(R.string.overview_style_aviation), getString(R.string.overview_style_nixie),
                 getString(R.string.overview_style_chronograph) };
-        bindChoices(settingsPane.findViewById(R.id.overview_style_choices), labels, overviewStyle(),
+    }
+
+    /** The style drop-down; every style is fed on every reading, only the chosen one is shown. */
+    private void bindOverviewStyle() {
+        OverviewStyle[] styles = OverviewStyle.values();
+        com.google.android.material.textfield.MaterialAutoCompleteTextView field =
+                settingsPane.findViewById(R.id.overview_style_choices);
+        // Wider than its field, which shares a row with the accent colour: "Retro (accent colour)".
+        field.setDropDownWidth(Math.round(360 * getResources().getDisplayMetrics().density));
+        bindChoices(field, styleLabels(), overviewStyle().ordinal(),
                 position -> {
-                    prefs.edit().putString(PREF_OVERVIEW_STYLE, OVERVIEW_STYLES[position]).apply();
+                    prefs.edit().putString(PREF_OVERVIEW_STYLE, styles[position].name()).apply();
                     applyOverviewStyle();
                 });
     }

app/src/main/java/com/evsuite/abrp/OverviewStyle.java

@@ -0,0 +1,44 @@
+package com.evsuite.abrp;
+
+/**
+ * The Overview styles in the order of the Settings drop-down, the value each is stored as, and
+ * whether it is drawn in the chosen accent colour. Styles with their own fixed palette (Retro's
+ * display, the starship console, the cartoon, the blueprint, the terminal, the flight display,
+ * the nixie tubes) ignore it, so Settings only offers the accent colour for the others. Pure
+ * Java, unit-tested.
+ */
+enum OverviewStyle {
+    TILES(true),
+    GAUGES(true),
+    COCKPIT(true),
+    RETRO(false),
+    RETRO_ACCENT(true),
+    FUTURISTIC(true),
+    SCIFI(false),
+    CARTOON(false),
+    BLUEPRINT(false),
+    MG(true),
+    MINIMAL(true),
+    TERMINAL(false),
+    AVIATION(false),
+    NIXIE(false),
+    CHRONOGRAPH(true);
+
+    static final String PREF_KEY = "overview_style";
+
+    /** Drawn in the accent colour, so the accent choice changes how it looks. */
+    final boolean usesAccent;
+
+    OverviewStyle(boolean usesAccent) {
+        this.usesAccent = usesAccent;
+    }
+
+    /** The stored style; "DASHBOARD" (Gauges before 2.22.3) and anything unknown handled. */
+    static OverviewStyle fromPref(String stored) {
+        if ("DASHBOARD".equals(stored)) return GAUGES;
+        for (OverviewStyle style : values()) {
+            if (style.name().equals(stored)) return style;
+        }
+        return TILES;
+    }
+}

app/src/main/res/layout-w1000dp/pane_settings.xml

@@ -10,25 +10,32 @@
                 <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_full_screen" android:textAppearance="@style/Text.EV.Secondary" />
                 <com.google.android.material.switchmaterial.SwitchMaterial android:id="@+id/voice_key_switch" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:text="@string/label_voice_key" android:textAppearance="@style/Text.EV.Body" android:paddingTop="8dp" android:paddingBottom="8dp" app:useMaterialThemeColors="true" app:thumbTint="@color/switch_thumb" app:trackTint="@color/switch_track" android:textColor="@color/ev_text_primary" />
                 <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_voice_key" android:textAppearance="@style/Text.EV.Secondary" />
+                <!-- The Overview style, and next to it the accent colour, which only styles drawn in it offer. -->
                 <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:baselineAligned="false">
-                    <LinearLayout android:layout_width="0dp" android:layout_weight="2" android:layout_height="wrap_content" android:layout_marginEnd="12dp" android:orientation="vertical">
+                    <LinearLayout android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content" android:layout_marginEnd="12dp" android:orientation="vertical">
+                        <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_overview_style" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="8dp" />
+                        <com.google.android.material.textfield.TextInputLayout style="@style/Widget.EV.Dropdown" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp">
+                            <com.google.android.material.textfield.MaterialAutoCompleteTextView android:id="@+id/overview_style_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:inputType="none" android:maxLines="1" android:ellipsize="end" android:textSize="20sp" app:simpleItemLayout="@layout/dropdown_item" />
+                        </com.google.android.material.textfield.TextInputLayout>
+                    </LinearLayout>
+                    <LinearLayout android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content" android:orientation="vertical">
+                        <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_accent" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="8dp" />
+                        <com.google.android.material.textfield.TextInputLayout android:id="@+id/accent_field" style="@style/Widget.EV.Dropdown" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp">
+                            <com.google.android.material.textfield.MaterialAutoCompleteTextView android:id="@+id/accent_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:inputType="none" android:maxLines="1" android:ellipsize="end" android:textSize="20sp" app:simpleItemLayout="@layout/dropdown_item" />
+                        </com.google.android.material.textfield.TextInputLayout>
+                    </LinearLayout>
+                </LinearLayout>
+                <TextView android:id="@+id/accent_note" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp" android:textAppearance="@style/Text.EV.Secondary" android:visibility="gone" />
+                <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:baselineAligned="false">
+                    <LinearLayout android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content" android:layout_marginEnd="12dp" android:orientation="vertical">
                         <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_tire_unit" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="8dp" />
                         <com.google.android.material.textfield.TextInputLayout style="@style/Widget.EV.Dropdown" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp">
                             <com.google.android.material.textfield.MaterialAutoCompleteTextView android:id="@+id/tire_unit_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:inputType="none" android:textSize="20sp" app:simpleItemLayout="@layout/dropdown_item" />
                         </com.google.android.material.textfield.TextInputLayout>
                     </LinearLayout>
-                    <LinearLayout android:layout_width="0dp" android:layout_weight="3" android:layout_height="wrap_content" android:orientation="vertical">
+                    <Space android:layout_width="0dp" android:layout_weight="1" android:layout_height="1dp" />
-                        <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_accent" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="8dp" />
-                        <com.google.android.material.textfield.TextInputLayout style="@style/Widget.EV.Dropdown" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp">
-                            <com.google.android.material.textfield.MaterialAutoCompleteTextView android:id="@+id/accent_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:inputType="none" android:textSize="20sp" app:simpleItemLayout="@layout/dropdown_item" />
-                        </com.google.android.material.textfield.TextInputLayout>
                 </LinearLayout>
             </LinearLayout>
-                <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_overview_style" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="8dp" />
-                <com.google.android.material.textfield.TextInputLayout style="@style/Widget.EV.Dropdown" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp">
-                    <com.google.android.material.textfield.MaterialAutoCompleteTextView android:id="@+id/overview_style_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:inputType="none" android:textSize="20sp" app:simpleItemLayout="@layout/dropdown_item" />
-                </com.google.android.material.textfield.TextInputLayout>
-            </LinearLayout>
         </LinearLayout>
         <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:orientation="vertical" android:layout_marginEnd="16dp">
             <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:paddingStart="24dp" android:paddingEnd="24dp" android:paddingTop="16dp" android:paddingBottom="16dp" android:background="@drawable/bg_glass">

app/src/main/res/layout/pane_settings.xml

@@ -7,18 +7,20 @@
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_full_screen" android:textAppearance="@style/Text.EV.Secondary" />
             <com.google.android.material.switchmaterial.SwitchMaterial android:id="@+id/voice_key_switch" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:text="@string/label_voice_key" android:textAppearance="@style/Text.EV.Body" android:paddingTop="8dp" android:paddingBottom="8dp" app:useMaterialThemeColors="true" app:thumbTint="@color/switch_thumb" app:trackTint="@color/switch_track" android:textColor="@color/ev_text_primary" />
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/hint_voice_key" android:textAppearance="@style/Text.EV.Secondary" />
+            <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_overview_style" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="20dp" />
+            <com.google.android.material.textfield.TextInputLayout style="@style/Widget.EV.Dropdown" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp">
+                <com.google.android.material.textfield.MaterialAutoCompleteTextView android:id="@+id/overview_style_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:inputType="none" android:textSize="20sp" app:simpleItemLayout="@layout/dropdown_item" />
+            </com.google.android.material.textfield.TextInputLayout>
+            <!-- Only styles drawn in the accent colour offer it. -->
+            <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_accent" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="20dp" />
+            <com.google.android.material.textfield.TextInputLayout android:id="@+id/accent_field" style="@style/Widget.EV.Dropdown" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp">
+                <com.google.android.material.textfield.MaterialAutoCompleteTextView android:id="@+id/accent_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:inputType="none" android:textSize="20sp" app:simpleItemLayout="@layout/dropdown_item" />
+            </com.google.android.material.textfield.TextInputLayout>
+            <TextView android:id="@+id/accent_note" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp" android:textAppearance="@style/Text.EV.Secondary" android:visibility="gone" />
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_tire_unit" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="20dp" />
             <com.google.android.material.textfield.TextInputLayout style="@style/Widget.EV.Dropdown" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp">
                 <com.google.android.material.textfield.MaterialAutoCompleteTextView android:id="@+id/tire_unit_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:inputType="none" android:textSize="20sp" app:simpleItemLayout="@layout/dropdown_item" />
             </com.google.android.material.textfield.TextInputLayout>
-            <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_accent" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="20dp" />
-            <com.google.android.material.textfield.TextInputLayout style="@style/Widget.EV.Dropdown" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="12dp">
-                <com.google.android.material.textfield.MaterialAutoCompleteTextView android:id="@+id/accent_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:inputType="none" android:textSize="20sp" app:simpleItemLayout="@layout/dropdown_item" />
-            </com.google.android.material.textfield.TextInputLayout>
-            <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/label_overview_style" android:textAppearance="@style/Text.EV.Body" android:layout_marginTop="8dp" />
-            <com.google.android.material.textfield.TextInputLayout style="@style/Widget.EV.Dropdown" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp">
-                <com.google.android.material.textfield.MaterialAutoCompleteTextView android:id="@+id/overview_style_choices" android:layout_width="match_parent" android:layout_height="wrap_content" android:minHeight="72dp" android:inputType="none" android:textSize="20sp" app:simpleItemLayout="@layout/dropdown_item" />
-            </com.google.android.material.textfield.TextInputLayout>
         </LinearLayout>
         <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="24dp" android:background="@drawable/bg_glass" android:layout_marginTop="16dp">
             <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/design_battery_settings_title" android:textAppearance="@style/Text.EV.Eyebrow" />

app/src/main/res/values/strings.xml

@@ -131,6 +131,7 @@
     <string name="overview_style_cartoon">Cartoon</string>
     <string name="overview_style_blueprint">Blueprint</string>
     <string name="overview_style_mg">MG</string>
+    <string name="accent_not_used">%1$s has its own colours. To change the accent colour, pick a style that uses it.</string>
     <string name="overview_fullscreen_enter">Overview full screen: hide the navigation</string>
     <string name="overview_fullscreen_exit">Show the navigation again</string>
     <string name="overview_style_minimal">Minimal</string>

app/src/test/java/com/evsuite/abrp/OverviewStyleTest.java

@@ -0,0 +1,35 @@
+package com.evsuite.abrp;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+/** The Overview styles — pure JVM. */
+public class OverviewStyleTest {
+
+    @Test
+    public void storedValuesRoundTrip() {
+        for (OverviewStyle style : OverviewStyle.values()) {
+            assertEquals(style, OverviewStyle.fromPref(style.name()));
+        }
+    }
+
+    @Test
+    public void oldAndUnknownValues() {
+        assertEquals(OverviewStyle.GAUGES, OverviewStyle.fromPref("DASHBOARD"));
+        assertEquals(OverviewStyle.TILES, OverviewStyle.fromPref(null));
+        assertEquals(OverviewStyle.TILES, OverviewStyle.fromPref("NOPE"));
+    }
+
+    @Test
+    public void onlyStylesDrawnInTheAccentOfferIt() {
+        assertTrue(OverviewStyle.TILES.usesAccent);
+        assertTrue(OverviewStyle.RETRO_ACCENT.usesAccent);
+        assertTrue(OverviewStyle.MG.usesAccent);
+        assertFalse(OverviewStyle.RETRO.usesAccent);
+        assertFalse(OverviewStyle.CARTOON.usesAccent);
+        assertFalse(OverviewStyle.NIXIE.usesAccent);
+    }
+}