Implement SeekBar component

2022-06-08 20:20:08 +02:00 · 2022-06-08 20:20:08 +02:00 · 7f141fddf4
commit 7f141fddf4
parent 1628702332
1 changed files with 101 additions and 0 deletions
--- a/app/src/main/kotlin/it/vfsfitvnm/vimusic/ui/components/SeekBar.kt
+++ b/app/src/main/kotlin/it/vfsfitvnm/vimusic/ui/components/SeekBar.kt
@ -0,0 +1,101 @@
+package it.vfsfitvnm.vimusic.ui.components
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.gestures.awaitFirstDown
+import androidx.compose.foundation.gestures.detectHorizontalDragGestures
+import androidx.compose.foundation.gestures.forEachGesture
+import androidx.compose.foundation.layout.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.drawWithContent
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.RectangleShape
+import androidx.compose.ui.graphics.Shape
+import androidx.compose.ui.input.pointer.PointerEventPass
+import androidx.compose.ui.input.pointer.changedToUp
+import androidx.compose.ui.input.pointer.pointerInput
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import kotlin.math.roundToLong
+
+@Composable
+fun SeekBar(
+    value: Long,
+    minimumValue: Long,
+    maximumValue: Long,
+    onDragStart: (Long) -> Unit,
+    onDrag: (Long) -> Unit,
+    onDragEnd: () -> Unit,
+    color: Color,
+    backgroundColor: Color,
+    modifier: Modifier,
+    barHeight: Dp = 3.5.dp,
+    scrubberColor: Color = color,
+    scrubberRadius: Dp = 6.dp,
+    shape: Shape = RectangleShape,
+) {
+    Box(
+        modifier = modifier
+            .pointerInput(minimumValue, maximumValue) {
+                if (maximumValue < minimumValue) return@pointerInput
+
+                detectHorizontalDragGestures(
+                    onHorizontalDrag = { _, delta ->
+                        onDrag((delta / size.width * (maximumValue - minimumValue)).roundToLong())
+                    },
+                    onDragEnd = onDragEnd,
+                    onDragCancel = onDragEnd
+                )
+            }
+            .pointerInput(minimumValue, maximumValue) {
+                if (maximumValue < minimumValue) return@pointerInput
+
+                forEachGesture {
+                    awaitPointerEventScope {
+                        val position = awaitFirstDown(requireUnconsumed = false)
+                        onDragStart((position.position.x / size.width * (maximumValue - minimumValue)).roundToLong())
+
+                        position.consume()
+
+                        if (awaitPointerEvent(PointerEventPass.Initial).changes.firstOrNull()
+                                ?.changedToUp() == true
+                        ) {
+                            onDragEnd()
+                        }
+                    }
+                }
+            }
+            .padding(horizontal = scrubberRadius)
+            .drawWithContent {
+                drawContent()
+
+                val scrubberPosition = if (maximumValue < minimumValue) {
+                    0f
+                } else {
+                    (value.toFloat() + minimumValue) / (maximumValue - minimumValue) * size.width
+                }
+
+                drawCircle(
+                    color = scrubberColor,
+                    radius = scrubberRadius.toPx(),
+                    center = center.copy(x = scrubberPosition)
+                )
+            }
+    ) {
+        Spacer(
+            modifier = Modifier
+                .height(barHeight)
+                .fillMaxWidth()
+                .background(color = backgroundColor, shape = shape)
+                .align(Alignment.Center)
+        )
+
+        Spacer(
+            modifier = Modifier
+                .height(barHeight)
+                .fillMaxWidth((value.toFloat() + minimumValue) / (maximumValue - minimumValue))
+                .background(color = color, shape = shape)
+        )
+    }
+}