I'm trying to achieve below cardview arc shape on cardview border/stroke.
Already tried to search on google but didn't find any relevant answer that suits with requirement.
Any lead or help will be appriciated.
Answer from Cirilo Bido and Raghunandan is good place to start, you round corners of rectangle with arcTo but you can't draw curved edges on top of clipped out shape. You need to use cubicTo to draw rounded edge and curve to clip out bottom shape
val shape = GenericShape {size: Size, layoutDirection: LayoutDirection ->
// draw cubic on left and right sides for button space
cubicTo()
}
You can check out this answer for drawing with cubic to. By combining both you can draw that path.
Jetpack Compose: How to draw a path / line like this
I created this path based on article shared by
Raghunandan initially, even though that is amazing answer for animating BottomBar it doesn't create a rounded shape if you look closely, at the bottom it's creating a triangular shape at the bottom instead of rounded one and shape OP requires and in article is also different.
So i used sliders to create bezier from the link i shared above. It's available as tutorial here too. Still it can be tweaked to more precise shape if you wish to.
I used x0, y0 as reference point to set control points and created this Path extension function.
fun Path.roundedRectanglePath(
size: Size,
cornerRadius: Float,
fabRadius: Float,
) {
val centerX = size.width / 2
val x0 = centerX - fabRadius * 1.15f
val y0 = 0f
// offset of the first control point (top part)
val topControlX = x0 + fabRadius * .5f
val topControlY = y0
// offset of the second control point (bottom part)
val bottomControlX = x0
val bottomControlY = y0 + fabRadius
// first curve
// set the starting point of the curve (P2)
val firstCurveStart = Offset(x0, y0)
// set the end point for the first curve (P3)
val firstCurveEnd = Offset(centerX, fabRadius * 1f)
// set the first control point (C1)
val firstCurveControlPoint1 = Offset(
x = topControlX,
y = topControlY
)
// set the second control point (C2)
val firstCurveControlPoint2 = Offset(
x = bottomControlX,
y = bottomControlY
)
// second curve
// end of first curve and start of second curve is the same (P3)
val secondCurveStart = Offset(
x = firstCurveEnd.x,
y = firstCurveEnd.y
)
// end of the second curve (P4)
val secondCurveEnd = Offset(
x = centerX + fabRadius * 1.15f,
y = 0f
)
// set the first control point of second curve (C4)
val secondCurveControlPoint1 = Offset(
x = secondCurveStart.x + fabRadius,
y = bottomControlY
)
// set the second control point (C3)
val secondCurveControlPoint2 = Offset(
x = secondCurveEnd.x - fabRadius / 2,
y = topControlY
)
// Top left arc
val radius = cornerRadius * 2
arcTo(
rect = Rect(
left = 0f,
top = 0f,
right = radius,
bottom = radius
),
startAngleDegrees = 180.0f,
sweepAngleDegrees = 90.0f,
forceMoveTo = false
)
lineTo(x = firstCurveStart.x, y = firstCurveStart.y)
// bezier curve with (P2, C1, C2, P3)
cubicTo(
x1 = firstCurveControlPoint1.x,
y1 = firstCurveControlPoint1.y,
x2 = firstCurveControlPoint2.x,
y2 = firstCurveControlPoint2.y,
x3 = firstCurveEnd.x,
y3 = firstCurveEnd.y
)
// bezier curve with (P3, C4, C3, P4)
cubicTo(
x1 = secondCurveControlPoint1.x,
y1 = secondCurveControlPoint1.y,
x2 = secondCurveControlPoint2.x,
y2 = secondCurveControlPoint2.y,
x3 = secondCurveEnd.x,
y3 = secondCurveEnd.y
)
lineTo(x = size.width - cornerRadius, y = 0f)
// Top right arc
arcTo(
rect = Rect(
left = size.width - radius,
top = 0f,
right = size.width,
bottom = radius
),
startAngleDegrees = -90.0f,
sweepAngleDegrees = 90.0f,
forceMoveTo = false
)
lineTo(x = 0f + size.width, y = size.height - cornerRadius)
// Bottom right arc
arcTo(
rect = Rect(
left = size.width - radius,
top = size.height - radius,
right = size.width,
bottom = size.height
),
startAngleDegrees = 0f,
sweepAngleDegrees = 90.0f,
forceMoveTo = false
)
lineTo(x = cornerRadius, y = size.height)
// Bottom left arc
arcTo(
rect = Rect(
left = 0f,
top = size.height - radius,
right = radius,
bottom = size.height
),
startAngleDegrees = 90.0f,
sweepAngleDegrees = 90.0f,
forceMoveTo = false
)
lineTo(x = 0f, y = cornerRadius)
close()
}
Composable that uses this shape
#Composable
private fun CustomArcShape(
modifier: Modifier,
elevation: Dp = 4.dp,
color: Color = MaterialTheme.colorScheme.surface,
contentColor: Color = contentColorFor(color),
content: #Composable () -> Unit
) {
val diameter = 60.dp
val radiusDp = diameter / 2
val cornerRadiusDp = 10.dp
val density = LocalDensity.current
val cutoutRadius = density.run { radiusDp.toPx() }
val cornerRadius = density.run { cornerRadiusDp.toPx() }
val shape = remember {
GenericShape { size: Size, layoutDirection: LayoutDirection ->
this.roundedRectanglePath(
size = size,
cornerRadius = cornerRadius,
fabRadius = cutoutRadius * 2
)
}
}
Spacer(modifier = Modifier.height(diameter / 2))
Box(contentAlignment = Alignment.TopCenter) {
FloatingActionButton(
shape = CircleShape,
containerColor = Color(0xffD32F2F),
modifier = Modifier
.offset(y = -diameter / 5)
.size(diameter)
.drawBehind {
drawCircle(
Color.Red.copy(.5f),
radius = 1.3f * size.width / 2
)
drawCircle(
Color.Red.copy(.3f),
radius = 1.5f * size.width / 2
)
}
.align(Alignment.TopCenter),
onClick = { /*TODO*/ }
) {
Icon(
tint = Color.White,
imageVector = Icons.Filled.Close,
contentDescription = "Close"
)
}
Surface(
modifier = modifier,
shape = shape,
shadowElevation = elevation,
color = color,
contentColor = contentColor
) {
Column {
Spacer(modifier = Modifier.height(diameter))
content()
}
}
}
}
And demonstration
#Composable
private fun CustomArcShapeSample() {
Column(
modifier = Modifier
.fillMaxSize()
) {
CustomArcShape(
modifier = Modifier
.padding(10.dp)
.fillMaxWidth()
.height(250.dp)
) {
Column(
modifier = Modifier.fillMaxSize(),
horizontalAlignment = Alignment.CenterHorizontally
) {
Text(
"Payment Failed",
color = MaterialTheme.colorScheme.error,
fontWeight = FontWeight.Bold
)
Spacer(modifier = Modifier.height(10.dp))
Text("Sorry !", fontSize = 24.sp, fontWeight = FontWeight.Bold)
Spacer(modifier = Modifier.height(10.dp))
Text("Your transfer to bank failed", color = Color.LightGray)
}
}
Spacer(modifier = Modifier.height(40.dp))
CustomArcShape(
modifier = Modifier
.padding(10.dp)
.fillMaxWidth()
.height(250.dp)
) {
Column(
modifier = Modifier
.fillMaxSize()
.border(1.dp, Color.Green),
horizontalAlignment = Alignment.CenterHorizontally
) {
Text(
"Payment Failed",
color = MaterialTheme.colorScheme.error,
fontWeight = FontWeight.Bold
)
Spacer(modifier = Modifier.height(10.dp))
Text("Sorry !", fontSize = 24.sp, fontWeight = FontWeight.Bold)
Spacer(modifier = Modifier.height(10.dp))
Text("Your transfer to bank failed", color = Color.LightGray)
}
}
}
}
You probably need to draw that arc in a custom composable, I found this article that can help you to understand the process of drawing in compose!
turtorial article: https://github.com/JeckOnly/passage/blob/master/Android/Widget/Compose/%E9%A1%B6%E9%83%A8%E5%87%B9%E9%99%B7Shape.md
code:https://gist.github.com/JeckOnly/54936415d1670103a4d400f66c8b31a1
hope this can help you though it is in Chinese language.
Related
I am attempting to create a vertical Likert scale using Jetpack Compose. Each field should include a vertical line that extends beyond its boundaries. I have also included an image to give an idea of what I am trying to achieve.
You can use a Box to put a Canvas on top of the row items.
Something like:
Box(Modifier.fillMaxWidth()){
//Just a simple for the row items
Column(
modifier = Modifier.fillMaxWidth(),
verticalArrangement = Arrangement.spacedBy(16.dp)
){
for (i in 1..5) {
RoundedIem()
}
}
//vertical Likert scale
Canvas(modifier = Modifier.fillMaxWidth()){
val height = 60.dp.toPx() //height of items
val verticalOffset = 76.dp.toPx() //height + vertical padding
val strokeWidthCircle =1f //stroke circle width
val radiusCircle = 30f //radius circle
for (i in 0..4) {
val circleCenterX = size.width-100f
val circleCenterY = height/2+ i*verticalOffset
//Inner white circle
drawCircle(
color = White,
radius = radiusCircle,
center = Offset(circleCenterX ,circleCenterY),
)
//Stroke circle
drawCircle(
color = DarkGray,
radius = radiusCircle,
center = Offset(circleCenterX, circleCenterY),
style = Stroke(width = strokeWidthCircle)
)
//vertical line
if (i < 4) {
val startY = circleCenterY + radiusCircle + strokeWidthCircle
drawLine(
color = DarkGray,
start = Offset(
x = circleCenterX,
y = startY),
end = Offset(
x = circleCenterX,
y = startY + verticalOffset - strokeWidthCircle),
strokeWidth = strokeWidthCircle
)
}
}
}
}
#Composable
fun RoundedIem(){
Row(
modifier= Modifier
.padding(horizontal = 16.dp)
.fillMaxWidth()
.height(60.dp)
.clip(RoundedCornerShape(8.dp))
.background(LightGray.copy(alpha = 0.5f))
.padding(start = 10.dp),
verticalAlignment = Alignment.CenterVertically,
){
Text("Option")
}
}
If you want to add also an icon in the circle you can draw the icon in the Canvas using:
//Icon
val painter = rememberVectorPainter(Icons.Default.Done)
Canvas(modifier = Modifier.fillMaxWidth()){
//previous code
val iconSize = 60f
//circle center - iconSize/2
translate(
left = circleCenterX - iconSize/2,
top = circleCenterY - iconSize/2
) {
with(painter) {
draw(
size = Size(iconSize,iconSize),//painter.intrinsicSize,
colorFilter = ColorFilter.tint(Color.Blue)
)
}
}
}
With a background:
drawCircle(
color = Blue,
radius = radiusCircle-8f,
center = Offset(circleCenterX,circleCenterY),
)
//circle center - iconSize/2
val iconSize = 48f
translate(
left = circleCenterX- iconSize/2,
top = circleCenterY -iconSize/2
) {
with(painter) {
draw(
size = Size(iconSize,iconSize),//painter.intrinsicSize,
colorFilter = ColorFilter.tint(Color.White)
)
}
}
I want to add a border to the top half of the Card component that has a corner radius (10dp).
So, only the bottom part is missing rest of the card has a stroke of 1dp. (kind of like U and inverted U)
And I want to do the same for card that has a bottom corner radius and the top part is missing.
I tried to design a custom shape but it's not respecting the shape of the card.
// this is just a line but it doesn't respect the card corner radius?
private fun createShape(thickness: Float) : Shape {
return GenericShape { size, _ ->
moveTo(0f,0f)
lineTo(0f, size.height)
lineTo(thickness, size.height)
lineTo(thickness, 0f)
lineTo(0f, thickness)
}
}
val thickness = with(LocalDensity.current) {
1.dp.toPx()
}
Card(
shape = RoundedCornerShape(topEnd = 10.dp, topStart = 10.dp, bottomEnd = 0.dp, bottomStart = 0.dp),
modifier = Modifier
.border(BorderStroke(width = 1.dp, color = Color.Black), createShape(thickness))
) {
...
}
Border doesn't seem to allow open shapes, forces shape to be closed even if you draw 3 lines because of that you need to use Modifier.drawBehind or Modifier.drawWithContent.
Created a Modifier that draws u shaped border as
fun Modifier.semiBorder(strokeWidth: Dp, color: Color, cornerRadiusDp: Dp) = composed(
factory = {
val density = LocalDensity.current
val strokeWidthPx = density.run { strokeWidth.toPx() }
val cornerRadius = density.run { cornerRadiusDp.toPx() }
Modifier.drawBehind {
val width = size.width
val height = size.height
drawLine(
color = color,
start = Offset(x = 0f, y = height),
end = Offset(x = 0f, y = cornerRadius),
strokeWidth = strokeWidthPx
)
// Top left arc
drawArc(
color = color,
startAngle = 180f,
sweepAngle = 90f,
useCenter = false,
topLeft = Offset.Zero,
size = Size(cornerRadius * 2, cornerRadius * 2),
style = Stroke(width = strokeWidthPx)
)
drawLine(
color = color,
start = Offset(x = cornerRadius, y = 0f),
end = Offset(x = width - cornerRadius, y = 0f),
strokeWidth = strokeWidthPx
)
// Top right arc
drawArc(
color = color,
startAngle = 270f,
sweepAngle = 90f,
useCenter = false,
topLeft = Offset(x = width - cornerRadius * 2, y = 0f),
size = Size(cornerRadius * 2, cornerRadius * 2),
style = Stroke(width = strokeWidthPx)
)
drawLine(
color = color,
start = Offset(x = width, y = height),
end = Offset(x = width, y = cornerRadius),
strokeWidth = strokeWidthPx
)
}
}
)
Usage
#Composable
private fun UShapeBorderSample() {
Card(
shape = RoundedCornerShape(
topEnd = 10.dp,
topStart = 10.dp,
bottomEnd = 0.dp,
bottomStart = 0.dp
),
modifier = Modifier
.semiBorder(1.dp, Color.Black, 10.dp)
) {
Box(
modifier = Modifier
.size(150.dp)
.background(Color.White),
contentAlignment = Alignment.Center
) {
Text("Hello World")
}
}
Spacer(modifier = Modifier.height(10.dp))
Card(
shape = RoundedCornerShape(
topEnd = 20.dp,
topStart = 20.dp,
bottomEnd = 0.dp,
bottomStart = 0.dp
),
modifier = Modifier
.semiBorder(1.dp, Color.Black, 20.dp)
) {
Box(
modifier = Modifier
.size(150.dp)
.background(Color.White),
contentAlignment = Alignment.Center
) {
Text("Hello World")
}
}
}
You need to use arc to create rounded corners. And when creating shape you don't pass thickness but radius of shape. Thickness is required when drawing border. What you draw is a rectangle with 1.dp width.
#Composable
private fun createShape(cornerRadius: Dp): Shape {
val density = LocalDensity.current
return GenericShape { size, _ ->
val width = size.width
val height = size.height
val cornerRadiusPx = density.run { cornerRadius.toPx() }
moveTo(0f, height)
// Vertical line on left size
lineTo(0f, cornerRadiusPx * 2)
arcTo(
rect = Rect(
offset = Offset.Zero,
size = Size(cornerRadiusPx * 2, cornerRadiusPx * 2)
),
startAngleDegrees = 180f,
sweepAngleDegrees = 90f,
forceMoveTo = false
)
lineTo(width - cornerRadiusPx * 2, 0f)
arcTo(
rect = Rect(
offset = Offset(width - cornerRadiusPx * 2, 0f),
size = Size(cornerRadiusPx * 2, cornerRadiusPx * 2)
),
startAngleDegrees = 270f,
sweepAngleDegrees = 90f,
forceMoveTo = false
)
// Vertical line on right size
lineTo(width, height)
}
}
Usage
#Composable
private fun UShapeBorderSample() {
Card(
shape = RoundedCornerShape(
topEnd = 10.dp,
topStart = 10.dp,
bottomEnd = 0.dp,
bottomStart = 0.dp
),
modifier = Modifier
.border(BorderStroke(width = 1.dp, color = Color.Black), createShape(10.dp))
) {
Box(modifier = Modifier
.size(200.dp)
.background(Color.White),
contentAlignment = Alignment.Center
) {
Text("Hello World")
}
}
}
Border doesn't respect shape because it's a drawing but Card is a Box under the hood that uses shape with Modifier.clip() which itself is Modifier.graphicsLayer{clip} that applies operations on a layer.
You can check out this answer about clip and border for the difference.
https://stackoverflow.com/a/73091667/5457853
I want to make a progress bar similar to this one with jetpack compose by canvas, and I've made some Shape, but I'm having trouble implementing the progress section.
I add a shape in drawWithContent of Box
Image
val path = Path()
path.moveTo(x = startOffset.x, y = startOffset.y)
path.addRoundRect(
RoundRect(
left = 0F,
top = 0F,
right = this.size.width,
bottom = this.size.height,
cornerRadius = CornerRadius(x = 16.dp.toPx(), y = 16.dp.toPx())
)
)
clipPath(
path = path,
clipOp = ClipOp.Intersect
) {
drawPath(
path = path,
style = Stroke(5.dp.toPx(), 16.dp.toPx(), cap = StrokeCap.Round),
brush = SolidColor(Color.Red),
)
}
You can try something like that
#Composable
private fun Q74121342() {
val density = LocalDensity.current
val strokeWidth = remember { with(density) { 2.dp.toPx() } } // Convert to px for much needed stroke width
val rotateTransition = rememberInfiniteTransition()
val rotateAnimateValue = rotateTransition.animateValue(
initialValue = 0f,
targetValue = 360f,
typeConverter = Float.VectorConverter,
animationSpec = infiniteRepeatable(
animation = tween(
durationMillis = 1000,
easing = LinearEasing
),
repeatMode = RepeatMode.Restart
)
) // Creating infinite animation. You can replace with finitive one and indicate current progress outside of composable
Image(
modifier = Modifier
.size(96.dp)
.padding(2.dp)
.drawBehind {
rotate(
degrees = rotateAnimateValue.value
) {
drawArc(
color = Color.Red,
startAngle = 0f,
sweepAngle = 180f,
useCenter = false,
style = Stroke(
width = strokeWidth,
cap = StrokeCap.Round,
join = StrokeJoin.Round,
)
) // Can be replaced with path but don't forget change image shape
}
} // Applying our custom paint
.padding(2.dp)
.clip(CircleShape), // Crop original image to much circle shape
painter = painterResource(R.drawable.img_profile),
contentDescription = null,
contentScale = ContentScale.Crop
)
}
You can see the demo on gist
Is there a way to have an Icon (with ImageVector) component with a shadow/elevation in Jetpack Compose?
I want to make an IconButton with an elevated Icon but there seems to be no solution available for this problem. Things like Modifier.shadow() will only draw a shadow box around my icon and the Icon component itself has no elevation parameter.
This ticket seems like a duplicate of How to add a shadow / border / elevation to an icon in Jetpack Compose at first glance, but that ticket is not referring to the Icon component in combination with an ImageVector. Also, the proposed solution does not work and it wasn't updated in 6 months.
To further clarify, I want my Icon to look like this:
What you require is a library that converts imageVectors or xml files into Path. As i know of there is no built-in library for this. There are probably few out there that converts into Path or Shape.
When you have a shape or path what you need to do is draw with this shape as Modifier or into Canvas
fun Modifier.vectorShadow(
path: Path,
x: Dp,
y: Dp,
radius: Dp
) = composed(
inspectorInfo = {
name = "vectorShadow"
value = path
value = x
value = y
value = radius
},
factory = {
val paint = remember {
Paint()
}
val frameworkPaint = remember {
paint.asFrameworkPaint()
}
val color = Color.DarkGray
val dx: Float
val dy: Float
val radiusInPx: Float
with(LocalDensity.current) {
dx = x.toPx()
dy = y.toPx()
radiusInPx = radius.toPx()
}
drawBehind {
this.drawIntoCanvas {
val transparent = color
.copy(alpha = 0f)
.toArgb()
frameworkPaint.color = transparent
frameworkPaint.setShadowLayer(
radiusInPx,
dx,
dy,
color
.copy(alpha = .7f)
.toArgb()
)
it.drawPath(path, paint)
}
}
}
)
Usage
Column(
modifier = Modifier
.fillMaxSize()
.padding(8.dp)
) {
val center = with(LocalDensity.current) {
150.dp.toPx()
}
val path1 = createPolygonPath(center, center, 6, center)
val path2 = createPolygonPath(center, center, 5, center)
Canvas(
modifier = Modifier
.size(300.dp)
.vectorShadow(path1, 0.dp, 0.dp, 6.dp)
.border(3.dp, Color.Green)
) {
drawPath(path1, Color.White)
}
Spacer(modifier = Modifier.height(10.dp))
Canvas(
modifier = Modifier
.size(300.dp)
.vectorShadow(path2, 3.dp, 3.dp, 10.dp)
.border(3.dp, Color.Green)
) {
drawPath(path2, Color.White)
}
}
Result
createPolygonPath is a sample function to create Path. If you manage to convert your vector to Path rest is simple.
fun createPolygonPath(cx: Float, cy: Float, sides: Int, radius: Float): Path {
val angle = 2.0 * Math.PI / sides
return Path().apply {
moveTo(
cx + (radius * cos(0.0)).toFloat(),
cy + (radius * sin(0.0)).toFloat()
)
for (i in 1 until sides) {
lineTo(
cx + (radius * cos(angle * i)).toFloat(),
cy + (radius * sin(angle * i)).toFloat()
)
}
close()
}
}
It's not exactly what you want but for elevating an icon you can simply do this:
Icon(
Icons.Outlined.Refresh, contentDescription = "back",
modifier = Modifier
.size(300.dp)
.offset(10.dp, 10.dp), tint = Color(0, 0, 0, 40)
)
Icon(
Icons.Outlined.Refresh, contentDescription = "front",
modifier = Modifier.size(300.dp), tint = Color(0xFFb6d7a8)
)
The problem is that it is lacking the blurring effect.
How to create an inner shadow with Jetpack Compose? The gradient should run from black on the outside to transparent on the inside. Modifier.shadow() is just for outer shadows. Using negative elevation is not working.
fun Modifier.innerShadow(
color: Color = Color.Black,
cornersRadius: Dp = 0.dp,
spread: Dp = 0.dp,
blur: Dp = 0.dp,
offsetY: Dp = 0.dp,
offsetX: Dp = 0.dp
) = drawWithContent {
drawContent()
val rect = Rect(Offset.Zero, size)
val paint = Paint()
drawIntoCanvas {
paint.color = color
paint.isAntiAlias = true
it.saveLayer(rect, paint)
it.drawRoundRect(
left = rect.left,
top = rect.top,
right = rect.right,
bottom = rect.bottom,
cornersRadius.toPx(),
cornersRadius.toPx(),
paint
)
val frameworkPaint = paint.asFrameworkPaint()
frameworkPaint.xfermode = PorterDuffXfermode(PorterDuff.Mode.DST_OUT)
if (blur.toPx() > 0) {
frameworkPaint.maskFilter = BlurMaskFilter(blur.toPx(), BlurMaskFilter.Blur.NORMAL)
}
val left = if (offsetX > 0.dp) {
rect.left + offsetX.toPx()
} else {
rect.left
}
val top = if (offsetY > 0.dp) {
rect.top + offsetY.toPx()
} else {
rect.top
}
val right = if (offsetX < 0.dp) {
rect.right + offsetX.toPx()
} else {
rect.right
}
val bottom = if (offsetY < 0.dp) {
rect.bottom + offsetY.toPx()
} else {
rect.bottom
}
paint.color = Color.Black
it.drawRoundRect(
left = left + spread.toPx() / 2,
top = top + spread.toPx() / 2,
right = right - spread.toPx() / 2,
bottom = bottom - spread.toPx() / 2,
cornersRadius.toPx(),
cornersRadius.toPx(),
paint
)
frameworkPaint.xfermode = null
frameworkPaint.maskFilter = null
}
}
Usage:
Box(
modifier = Modifier
.width(240.dp)
.height(180.dp)
.outerShadow(
color = Color(0xff000000),
alpha = 0.5f,
cornersRadius = 20.dp,
shadowBlurRadius = 30.dp,
offsetX = 0.dp,
offsetY = 15.dp
)
.clip(RoundedCornerShape(20.dp))
.background(Color(0xFF282A2F))
.innerShadow(
blur = 1.dp,
color = Color(0xff00FFFF),
cornersRadius = 20.dp,
offsetX = (-40.5).dp,
offsetY = (-10.5).dp
)
.innerShadow(
blur = 20.dp,
color = Color(0xffff0000),
cornersRadius = 20.dp,
offsetX = 0.5.dp,
offsetY = 0.5.dp
)
.padding(14.dp),
contentAlignment = Alignment.Center
) {
Text(
text = stringResource(id = R.string.notification_service),
modifier = Modifier,
color = Color.White
)
}
I hope it helps.
outerShadow is custom modifier too, copied from other websites.
Position of Modifier.shadow relative to Modifier.background places shadow inside your component. Also you can create Modifier.drawWithContent and frameworkPaint a show with blur.
Column(
modifier = Modifier
.fillMaxSize()
.padding(20.dp)
) {
ComponentWithInnerShadow()
Spacer(modifier = Modifier.height(12.dp))
ComponentWithOuterShadow()
Spacer(modifier = Modifier.height(12.dp))
ComponentWithCustomInnerShadow()
}
#Composable private fun ComponentWithInnerShadow() {
Column(
modifier = Modifier
.clip(RoundedCornerShape(5.dp))
.background(Color.Yellow)
.shadow(2.dp, shape = RoundedCornerShape(5.dp))
) {
Text(text = "Hello World", modifier = Modifier.padding(12.dp))
} }
#Composable
private fun ComponentWithOuterShadow() {
Column(
modifier = Modifier
.shadow(2.dp, shape = RoundedCornerShape(5.dp))
.background(Color.Yellow)
) {
Text(text = "Hello World", modifier = Modifier.padding(12.dp))
}
}
#Composable
private fun ComponentWithCustomInnerShadow() {
Column(
modifier = Modifier.innerShadow()
) {
Text(text = "Hello World", modifier = Modifier.padding(12.dp))
}
}
And with composed modifier. I didn't set parameters just set arbitrary numbers you can set your own parameters, and set color if you want to. This one looks better than standard inner shadow though. You need to provide color for foreground and shape with this one either. I set color and drew Rounded rectangle for demonstration
fun Modifier.innerShadow() = composed(
inspectorInfo = {
},
factory = {
val paint = remember() {
Paint()
}
val foregroundPaint = remember() {
Paint().apply {
color = Color.Yellow
}
}
val frameworkPaint = remember {
paint.asFrameworkPaint()
}
Modifier.drawWithContent {
this.drawIntoCanvas {
val color = Color.LightGray
val radius = 2.dp.toPx()
val shadowColor = color
.copy(alpha = .7f)
.toArgb()
val transparent = color
.copy(alpha = 0f)
.toArgb()
frameworkPaint.color = transparent
frameworkPaint.setShadowLayer(
radius,
0f,
0f,
shadowColor
)
val shadowRadius = 4.dp.toPx()
it.drawRoundRect(
left = 0f,
top = 0f,
right = this.size.width,
bottom = this.size.height,
radiusX = 5.dp.toPx(),
radiusY = 5.dp.toPx(),
paint = foregroundPaint
)
it.drawRoundRect(
left = 0f,
top = 0f,
right = this.size.width,
bottom = this.size.height,
radiusX = 5.dp.toPx(),
radiusY = 5.dp.toPx(),
paint = paint
)
it.drawRoundRect(
left = shadowRadius,
top = shadowRadius,
right = this.size.width - shadowRadius,
bottom = this.size.height - shadowRadius,
radiusX = 5.dp.toPx(),
radiusY = 5.dp.toPx(),
paint = foregroundPaint
)
drawContent()
}
}
}
)
This is not supported but you have alternative options:
Use a border modifier with a gradient brush
Use Android Canvas
Use a gradient and Modifier.drawBehind to draw the inset shadow underneath the content
Source