Components: the pad's LB / RB step through FEX, DXVK and VKD3D-Proton (wrapping), with LB / RB badges beside the tabs

app/src/main/java/com/droiddeck/launcher/MainActivity.kt

@@ -12,6 +12,7 @@ import android.os.Handler
 import android.os.Looper
 import android.util.Log
 import android.view.Display
+import android.view.KeyEvent
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.result.contract.ActivityResultContracts
@@ -434,6 +435,19 @@ class MainActivity : ComponentActivity() {
         }, "finish-abandoned").start()
     }
 
+    /** On the Components page the pad's LB / RB step through FEX, DXVK and VKD3D-Proton, wrapping around. */
+    override fun dispatchKeyEvent(event: KeyEvent): Boolean {
+        if (showComponents && (event.keyCode == KeyEvent.KEYCODE_BUTTON_L1 || event.keyCode == KeyEvent.KEYCODE_BUTTON_R1)) {
+            if (event.action == KeyEvent.ACTION_DOWN && event.repeatCount == 0) {
+                val all = ComponentsManager.COMPONENTS
+                val step = if (event.keyCode == KeyEvent.KEYCODE_BUTTON_R1) 1 else all.size - 1
+                compComp = all[(all.indexOf(compComp).coerceAtLeast(0) + step) % all.size]
+            }
+            return true
+        }
+        return super.dispatchKeyEvent(event)
+    }
+
     override fun onResume() {
         super.onResume()
         // Swaps queued while a game ran on that Proton go in once nothing uses it (usually the

app/src/main/java/com/droiddeck/launcher/ui/ComponentsPage.kt

@@ -138,7 +138,11 @@ fun ComponentsPage(
                         }
                     }
                 }
-                Segmented(ComponentsManager.COMPONENTS.map { it to ComponentsManager.LABEL.getValue(it) }, comp, onComp)
+                Row(verticalAlignment = Alignment.CenterVertically, horizontalArrangement = Arrangement.spacedBy(6.dp)) {
+                    BumperHint("LB")
+                    Segmented(ComponentsManager.COMPONENTS.map { it to ComponentsManager.LABEL.getValue(it) }, comp, onComp)
+                    BumperHint("RB")
+                }
                 val st = view.components.getValue(comp)
                 Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.weight(1f)) {
                     Box(Modifier.size(8.dp).background(if (st.queued != null) Color(0xFFFFB86B) else pal.good, CircleShape))
@@ -265,6 +269,17 @@ fun ComponentsPage(
     }
 }
 
+/** The pad's bumper that turns the component tabs, as a small badge beside them. */
+@Composable
+private fun BumperHint(text: String) {
+    val colors = MaterialTheme.colorScheme
+    val pal = LocalPalette.current
+    Text(
+        text, fontSize = 10.sp, fontWeight = FontWeight.Bold, letterSpacing = 0.5.sp, color = colors.onSurfaceVariant, maxLines = 1,
+        modifier = Modifier.clip(RoundedCornerShape(5.dp)).border(1.dp, pal.line2, RoundedCornerShape(5.dp)).padding(horizontal = 5.dp, vertical = 2.dp),
+    )
+}
+
 @Composable
 private fun SectionLabel(text: String) {
     val colors = MaterialTheme.colorScheme