Fixed slider-drag problem in [falling-balls-mpp] example. (#1750)

experimental/examples/falling-balls-mpp/src/commonMain/kotlin/fallingBalls/FallingBalls.kt

@@ -14,6 +14,7 @@ import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.em
 import org.jetbrains.skiko.KotlinBackend
+import kotlin.math.round
 
 @Composable
 fun FallingBalls(game: Game) {
@@ -24,13 +25,13 @@ fun FallingBalls(game: Game) {
             fontSize = 1.8f.em,
             color = Color(218, 120, 91)
         )
-        Text("Score: ${game.score} Time: ${game.elapsed / 1_000_000} Blocks: ${game.numBlocks}", fontSize = 1.8f.em)
+        Text("Score: ${game.score} Time: ${game.elapsed / 1_000_000} Blocks: ${game.numBlocks.toInt()}", fontSize = 1.8f.em)
         Row {
             if (!game.started) {
                 Slider(
                     value = game.numBlocks / 20f,
-                    onValueChange = { game.numBlocks = (it * 20f).toInt().coerceAtLeast(1) },
+                    onValueChange = { game.numBlocks = (it * 20f).coerceAtLeast(1f) },
-                    modifier = Modifier.width(100.dp)
+                    modifier = Modifier.width(250.dp)
                 )
             }
             Button(

experimental/examples/falling-balls-mpp/src/commonMain/kotlin/fallingBalls/Game.kt

@@ -33,7 +33,7 @@ class Game(val time: Time) {
     var paused by mutableStateOf(false)
     var finished by mutableStateOf(false)
 
-    var numBlocks by mutableStateOf(5)
+    var numBlocks by mutableStateOf(5f)
 
     fun start() {
         previousTimeNanos = time.now()
@@ -43,7 +43,7 @@ class Game(val time: Time) {
         finished = false
         paused = false
         pieces.clear()
-        repeat(numBlocks) { index ->
+        repeat(numBlocks.toInt()) { index ->
             pieces.add(PieceData(this, index * 1.5f + 5f, colors[index % colors.size]).also { piece ->
                 piece.position = Random.nextDouble(0.0, 100.0).toFloat()
             })
@@ -65,7 +65,7 @@ class Game(val time: Time) {
     fun clicked(piece: PieceData) {
         score += piece.velocity.toInt()
         clicked++
-        if (clicked == numBlocks) {
+        if (clicked == numBlocks.toInt()) {
             finished = true
         }
     }