App 2.45.1: Halloween's song flies across the sky on a bat's banner

Instead of a line at the foot of the hill, a bat tows a parchment
banner with the title and artist through the sky above the sign.

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

app/build.gradle

@@ -34,8 +34,8 @@ android {
         applicationId "com.stinnesbeck.nilsmg4"
         minSdk 27
         targetSdk 36
-        versionCode 160
-        versionName "2.45.0"
+        versionCode 161
+        versionName "2.45.1"
 
         // 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/HalloweenView.java

@@ -27,7 +27,7 @@ import java.util.Locale;
  * of power, rising with it, in orange or, where it regenerated, green. Unread values show "—" and
  * light nothing. With music playing, the pumpkin's glow swells and its carving brightens on the
  * beat ({@link MusicTap}); colours and the embers keep their meaning, and with no music it burns as
- * before. What plays is carved into the foot of the hill ({@link NowPlaying}).
+ * before. What plays flies across the sky on a banner a bat tows ({@link NowPlaying}).
  *
  * The night sky is drawn once into a bitmap per size; only the rest goes over it. Bats, bubbles and
  * the ghost move (about 30 frames a second) only while the car moves and the view is on screen;
@@ -96,10 +96,10 @@ final class HalloweenView extends ClusterCanvasView {
         if (sky == null || skyW != w || skyH != h) buildSky(w, h, u);
         c.drawBitmap(sky, 0, 0, image);
         drawBats(c, w, u);
+        boolean song = drawSong(c, w, u);
         drawMoon(c, w, u);
         drawGhost(c, w, u);
         drawHill(c, w, h, u);
-        drawSong(c, w, h, u);
         drawEmbers(c, w, u);
         float pulse = music == null ? 0f : music.pulse();
         drawPumpkin(c, w, u, pulse);
@@ -107,7 +107,7 @@ final class HalloweenView extends ClusterCanvasView {
         drawFlask(c, u);
         drawTombstone(c, w, u);
         drawGears(c, w, u);
-        keepAnimating(moving || pulse > 0f, 33);
+        keepAnimating(moving || pulse > 0f || song, 33);
     }
 
     private void label(Canvas c, String s, float x, float y, float size, int colour, Typeface tf, Paint.Align a) {
@@ -277,17 +277,51 @@ final class HalloweenView extends ClusterCanvasView {
         }
     }
 
-    // ---------- What plays, carved into the hill ----------
+    // ---------- What plays: a bat tows it across the sky on a banner ----------
 
-    private void drawSong(Canvas c, int w, int h, float u) {
-        if (v.songTitle == null) return;
-        text.setTypeface(thin);
-        text.setTextSize(20f * u);
-        float room = w * 0.44f;
-        String artist = v.songArtist == null ? "" : " — " + cut(v.songArtist, room / 2f);
+    /**
+     * A bat pulls a parchment banner with the song from left to right, high in the sky, behind the
+     * sign and the moon, again and again while something plays. Returns whether it is drawn, so
+     * the view keeps animating for it.
+     */
+    private boolean drawSong(Canvas c, int w, float u) {
+        if (v.songTitle == null) return false;
+        text.setTypeface(face);
+        text.setTextSize(19f * u);
+        float room = Math.min(560f * u, w * 0.45f);
+        String artist = v.songArtist == null ? "" : " — " + cut(v.songArtist, room / 2.5f);
         // A long title gives way, so the artist stays.
         String s = "♪ " + cut(v.songTitle, room - text.measureText("♪ " + artist)) + artist;
-        label(c, s, w / 2f, h - 12f * u, 20f * u, AccentColor.withAlpha(BONE, 0xC0), thin, Paint.Align.CENTER);
+        float t = SystemClock.uptimeMillis() / 1000f;
+        float bw = text.measureText(s) + 40f * u, bh = 30f * u, tow = 56f * u;
+        // One pass takes about half a minute; then it comes round again from the left.
+        float travel = w + bw + tow + 80f * u;
+        float bx = (t * 70f * u) % travel - bw - tow - 40f * u;
+        // In the strip of sky above the sign, clear of it.
+        float yc = 34f * u + (float) Math.sin(t * 1.3f) * 4f * u;
+        float top = yc - bh / 2f, bottom = yc + bh / 2f, right = bx + bw, notch = 12f * u;
+        // The ribbon, its trailing end cut as a swallowtail.
+        path.reset();
+        path.moveTo(bx, top);
+        path.lineTo(right, top);
+        path.lineTo(right, bottom);
+        path.lineTo(bx, bottom);
+        path.lineTo(bx + notch, yc);
+        path.close();
+        fill.setColor(BONE);
+        c.drawPath(path, fill);
+        line.setColor(0xFF8A6A3A);
+        line.setStrokeWidth(2f * u);
+        c.drawPath(path, line);
+        label(c, s, bx + notch + (bw - notch) / 2f, yc + 7f * u, 19f * u, INK, face, Paint.Align.CENTER);
+        // The tow lines, and the bat at their end.
+        float batX = right + tow, batY = yc - 10f * u;
+        line.setColor(BAT_EDGE);
+        line.setStrokeWidth(1.5f * u);
+        c.drawLine(right, top + 3f * u, batX, batY + 6f * u, line);
+        c.drawLine(right, bottom - 3f * u, batX, batY + 6f * u, line);
+        bat(c, batX, batY, 26f * u, (float) Math.sin(t * 12f), u);
+        return true;
     }
 
     /** {@code s} cut with "…" to fit {@code room} in the text paint as set. */