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March 3, 2024 13:56
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CornerOverlay
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| import androidx.compose.foundation.Canvas | |
| import androidx.compose.foundation.layout.fillMaxSize | |
| import androidx.compose.runtime.Composable | |
| import androidx.compose.ui.Modifier | |
| import androidx.compose.ui.geometry.CornerRadius | |
| import androidx.compose.ui.geometry.Offset | |
| import androidx.compose.ui.graphics.drawscope.DrawScope | |
| import androidx.compose.ui.graphics.Color | |
| import androidx.compose.ui.geometry.Rect | |
| import androidx.compose.ui.geometry.RoundRect | |
| import androidx.compose.ui.geometry.Size | |
| import androidx.compose.ui.graphics.ClipOp | |
| import androidx.compose.ui.graphics.Path | |
| import androidx.compose.ui.graphics.SolidColor | |
| import androidx.compose.ui.graphics.drawscope.Stroke | |
| import androidx.compose.ui.graphics.drawscope.clipPath | |
| import androidx.compose.ui.tooling.preview.Preview | |
| import androidx.compose.ui.unit.dp | |
| @Composable | |
| fun CornerOverlay() { | |
| Canvas(modifier = Modifier.fillMaxSize()) { | |
| val rectWidth = size.width * 0.7f | |
| val rectHeight = size.width * 0.7f | |
| val left = (size.width - rectWidth) / 2 | |
| val top = (size.height - rectHeight) / 2 | |
| val right = left + rectWidth | |
| val bottom = top + rectHeight | |
| val alpha = 0.5f | |
| val borderColor = Color.White | |
| val borderWidth = 4.dp | |
| val cornerRadius = 20.dp | |
| val rect0 = Rect(left, top, right, bottom) | |
| val path = Path().apply { | |
| addRect(rect0) | |
| } | |
| clipPath(path) { | |
| drawRect(SolidColor(Color.Black.copy(alpha = alpha))) | |
| } | |
| clipPath( | |
| Path().apply { | |
| addRect(rect0) | |
| addRoundRect(RoundRect(left, top, right, bottom, cornerRadius = CornerRadius(cornerRadius.toPx()))) | |
| }, | |
| clipOp = ClipOp.Difference, | |
| ) { | |
| drawRect(SolidColor(Color.Black.copy(alpha = alpha))) | |
| } | |
| drawRoundRect( | |
| color = borderColor, | |
| style = Stroke(width = borderWidth.toPx()), | |
| topLeft = Offset(left, top), | |
| size = Size(rectWidth, rectHeight), | |
| cornerRadius = CornerRadius(cornerRadius.toPx()), | |
| ) | |
| } | |
| } | |
| @Preview | |
| @Composable | |
| fun CornerOverlayPreview() { | |
| CornerOverlay() | |
| } | |
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