209 lines
5.4 KiB
Kotlin
209 lines
5.4 KiB
Kotlin
package moe.fuqiuluo.shamrock.ui.tools
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import android.os.Build
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import androidx.annotation.RequiresApi
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import androidx.compose.foundation.background
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import androidx.compose.foundation.layout.ColumnScope
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import androidx.compose.foundation.layout.padding
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import androidx.compose.foundation.shape.RoundedCornerShape
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import androidx.compose.material3.Card
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import androidx.compose.material3.CardDefaults
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import androidx.compose.material3.CardElevation
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import androidx.compose.runtime.Composable
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import androidx.compose.runtime.Stable
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import androidx.compose.ui.Modifier
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import androidx.compose.ui.draw.drawBehind
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import androidx.compose.ui.graphics.Color
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import androidx.compose.ui.graphics.Paint
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import androidx.compose.ui.graphics.drawscope.drawIntoCanvas
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import androidx.compose.ui.res.colorResource
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import androidx.compose.ui.unit.Dp
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import androidx.compose.ui.unit.dp
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/**
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* 绘制阴影范围
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* [top] 顶部范围
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* [start] 开始范围
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* [bottom] 底部范围
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* [end] 结束范围
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* Create empty Shadow elevation
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*/
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open class ShadowElevation(
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val top: Dp = 0.dp,
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val start: Dp = 0.dp,
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val bottom: Dp = 0.dp,
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val end: Dp = 0.dp
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){
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companion object : ShadowElevation()
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}
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/**
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* 绘制阴影内侧间距
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* @param horizontal 横向
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* @param vertical 纵向
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* @return ShadowElevation
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*/
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@Stable
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fun ShadowElevation.padding(
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horizontal: Dp = 0.dp,
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vertical: Dp = 0.dp
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): ShadowElevation {
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return ShadowElevation(
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top = horizontal,
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start = vertical,
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bottom = horizontal,
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end = vertical,
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)
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}
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/**
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* 绘制阴影所有范围
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* @param elevation 圆角
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* @return ShadowElevation
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*/
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fun ShadowElevation.all(
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elevation: Dp = 0.dp,
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): ShadowElevation {
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return ShadowElevation(
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top = elevation,
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start = elevation,
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bottom = elevation,
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end = elevation,
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)
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}
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class ShadowShape(
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val topStart: Dp = 0.dp,
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val bottomStart: Dp = 0.dp,
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val topEnd: Dp = 0.dp,
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val bottomEnd: Dp = 0.dp
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)
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fun ShadowShape.padding(
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topAll: Dp = 0.dp,
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bottomAll: Dp = 0.dp
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): ShadowShape {
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return ShadowShape(
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topStart = topAll,
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bottomStart = bottomAll,
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topEnd = topAll,
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bottomEnd = bottomAll,
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)
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}
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fun ShadowShape.all(
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elevation: Dp = 0.dp,
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): ShadowShape {
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return ShadowShape(
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topStart = elevation,
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bottomStart = elevation,
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topEnd = elevation,
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bottomEnd = elevation,
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)
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}
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/**
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* 阴影Layout
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* 不支持圆角,在Modifier中设置圆角会导致无作用
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* 以子控件的大小为测试，请在子控件中设置padding及长宽
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* @param shadowColor [Color] 绘制阴影颜色
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* @param elevation [ShadowElevation] 绘制阴影范围
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* @param shape [Dp] 绘制圆角
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* @param offsetX [Dp] 偏移X轴
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* @param offsetY [Dp] 偏移Y轴
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* @param content (slot) 填充内容
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* @receiver
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*/
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@RequiresApi(Build.VERSION_CODES.O)
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@Composable
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fun ShadowLayout(
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modifier: Modifier = Modifier,
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shadowColor : Color = Color(0xffD3DBF9),
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elevation: ShadowElevation = ShadowElevation(),
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shape: Dp = 10.dp,
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offsetX: Dp = 0.dp,
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offsetY: Dp = 0.dp,
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alpha: Float = 0.5f,
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content: @Composable ColumnScope.() -> Unit,
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) {
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Card(
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modifier = modifier
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.padding(
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top = elevation.top,
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bottom = elevation.bottom,
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start = elevation.start,
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end = elevation.end
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)
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.drawColoredShadow(
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shadowColor,
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alpha,
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borderRadius = shape,
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shadowRadius = shape,
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offsetX = offsetX,
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offsetY = offsetY,
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roundedRect = true
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)
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.background(Color.Transparent)
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,
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elevation = CardDefaults.cardElevation(
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0.dp, 0.dp, 0.dp, 0.dp, 0.dp, 0.dp
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),
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shape = RoundedCornerShape(0.dp) ,
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content = content,
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)
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}
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/**
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* 绘制基础阴影
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* @param color 颜色
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* @param alpha 颜色透明度
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* @param borderRadius 阴影便捷圆角
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* @param shadowRadius 阴影圆角
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* @param offsetX 偏移X轴
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* @param offsetY 偏移Y轴
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* @param roundedRect 是否绘制圆角就行
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*/
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@RequiresApi(Build.VERSION_CODES.O)
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fun Modifier.drawColoredShadow(
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color: Color,
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alpha: Float = 0.2f,
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borderRadius: Dp = 0.dp,
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shadowRadius: Dp = 0.dp,
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offsetX: Dp = 0.dp,
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offsetY: Dp = 0.dp,
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roundedRect: Boolean = true
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) = this.drawBehind {
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/**将颜色转换为Argb的Int类型*/
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val transparentColor = android.graphics.Color.toArgb(color.copy(alpha = .0f).value.toLong())
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val shadowColor = android.graphics.Color.toArgb(color.copy(alpha = alpha).value.toLong())
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/**调用Canvas绘制*/
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this.drawIntoCanvas {
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val paint = Paint()
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paint.color = Color.Transparent
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/**调用底层fragment Paint绘制*/
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val frameworkPaint = paint.asFrameworkPaint()
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frameworkPaint.color = transparentColor
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/**绘制阴影*/
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frameworkPaint.setShadowLayer(
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shadowRadius.toPx(),
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offsetX.toPx(),
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offsetY.toPx(),
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shadowColor
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)
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/**形状绘制*/
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it.drawRoundRect(
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0f,
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0f,
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this.size.width,
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this.size.height,
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if (roundedRect) this.size.height / 2 else borderRadius.toPx(),
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if (roundedRect) this.size.height / 2 else borderRadius.toPx(),
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paint
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)
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}
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} |