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PuppyDetail.kt
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PuppyDetail.kt
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/*
* Copyright 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.androiddevchallenge
import androidx.annotation.IntRange
import androidx.compose.animation.AnimatedVisibility
import androidx.compose.animation.ExperimentalAnimationApi
import androidx.compose.animation.animateContentSize
import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.VectorConverter
import androidx.compose.animation.core.tween
import androidx.compose.animation.expandHorizontally
import androidx.compose.animation.shrinkHorizontally
import androidx.compose.foundation.Image
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.gestures.animateScrollBy
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxWithConstraints
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.absoluteOffset
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.LazyListState
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.Icon
import androidx.compose.material.MaterialTheme
import androidx.compose.material.Surface
import androidx.compose.material.Text
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.StarRate
import androidx.compose.material.icons.outlined.Star
import androidx.compose.material.icons.outlined.StarRate
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.geometry.Rect
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Brush
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shadow
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.layout.onGloballyPositioned
import androidx.compose.ui.layout.positionInRoot
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.DpOffset
import androidx.compose.ui.unit.dp
import com.example.androiddevchallenge.ui.theme.MyTheme
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch
import kotlin.math.max
@Preview
@Composable
fun PreviewPuppyDetailDark() {
MyTheme(darkTheme = true) {
PuppyDetailStatic(DetailScreen(Puppy.Berkay, Rect(0f, 0f, 0f, 0f)), onBack = {})
// RatingBar(rating = 2)
}
}
@Preview
@Composable
fun PreviewPuppyDetailLight() {
MyTheme(darkTheme = false) {
PuppyDetailStatic(DetailScreen(Puppy.Berkay, Rect(0f, 0f, 0f, 0f)), onBack = {})
// RatingBar(rating = 3)
}
}
@Composable
fun RatingBar(@IntRange(from = 1, to = 5) rating: Int) {
val icon = Icons.Outlined.Star
Row {
for (i in 1..5) {
val isActive = rating >= i
Icon(
imageVector = if (isActive) Icons.Filled.StarRate else Icons.Outlined.StarRate,
contentDescription = null,
tint = if (isActive) MaterialTheme.colors.secondary else MaterialTheme.colors.onSurface.copy(alpha = 0.7f)
)
}
}
}
@Composable
fun DetailTitle(title: String, modifier: Modifier) {
val surfaceColor = MaterialTheme.colors.surface
val headerStyle = MaterialTheme.typography.h2.copy(
color = MaterialTheme.colors.onSurface,
shadow = Shadow(blurRadius = 4f, color = surfaceColor)
)
Surface(
modifier
.background(
Brush.verticalGradient(listOf(surfaceColor, Color.Transparent)),
alpha = 0.7f
),
color = Color.Transparent,
) {
Box(contentAlignment = Alignment.Center) {
Text(
title,
Modifier.padding(8.dp),
style = headerStyle,
color = MaterialTheme.colors.onSurface
)
}
}
}
@OptIn(ExperimentalAnimationApi::class)
@Composable
fun PuppyDetailStatic(params: DetailScreen, onBack: () -> Unit) {
val scope = rememberCoroutineScope()
var uiVisible by remember { mutableStateOf(true) }
var titleVisibility by remember { mutableStateOf(false) }
var characteristicsVisibility by remember { mutableStateOf(false) }
val descriptionListState = remember { LazyListState() }
val initialScrollDP = 50.dp
val initialScroll = with(LocalDensity.current) { initialScrollDP.toPx() }
val imageOffset = remember { Animatable(DpOffset.Zero, DpOffset.VectorConverter) }
val imageSize = remember { Animatable(Size.Zero, Size.VectorConverter) }
var positioned by remember { mutableStateOf(false) }
val density = LocalDensity.current
val scrollPadding = with(LocalDensity.current) {
max(0f, (descriptionListState.firstVisibleItemScrollOffset.toFloat() - initialScroll) / 1.5f).toDp()
}
val scrollVisibility = scrollPadding < 8.dp
val cornerSize = 16.dp
fun toggelUI() {
scope.launch {
uiVisible = uiVisible.not()
if (uiVisible) {
descriptionListState.animateScrollBy(initialScroll)
} else {
descriptionListState.animateScrollToItem(0, 0)
}
}
}
LaunchedEffect(key1 = params) {
delay(500)
titleVisibility = true
delay(300)
characteristicsVisibility = true
delay(300)
descriptionListState.animateScrollBy(initialScroll)
}
Box(
Modifier.fillMaxWidth().clickable { toggelUI() }
.onGloballyPositioned {
if (positioned.not()) {
positioned = true
val offset = it.positionInRoot()
log("local offset: $offset")
log("original size: ${params.imagePosition.size}")
// val tmp = it.localBoundingBoxOf(imagePosition)
val oldOffset: DpOffset
val oldSize: Size
val newSize: Size
with(density) {
val img = params.imagePosition
oldSize = Size(img.width.toDp().value, img.height.toDp().value)
newSize = Size(it.size.width.toDp().value, it.size.height.toDp().value)
oldOffset =
DpOffset((offset.x + img.left).toDp(), (offset.y + img.top).toDp())
}
scope.launch {
log("snap to old offset: $oldOffset")
imageOffset.snapTo(oldOffset)
imageOffset.animateTo(DpOffset.Zero, tween(500))
}
scope.launch {
imageSize.snapTo(oldSize)
imageSize.animateTo(newSize, tween(500))
}
}
}
) {
Image(
painter = painterResource(params.puppy.smallRes),
contentDescription = null,
contentScale = ContentScale.Crop,
modifier = Modifier
.absoluteOffset(imageOffset.value.x, imageOffset.value.y)
.size(imageSize.value.width.dp, imageSize.value.height.dp)
.padding(bottom = scrollPadding)
)
Column {
AnimatedVisibility(visible = titleVisibility && uiVisible) {
DetailTitle(params.puppy.dogName, Modifier.fillMaxWidth())
}
BoxWithConstraints(Modifier.weight(1f)) {
androidx.compose.animation.AnimatedVisibility(
modifier = Modifier.align(Alignment.BottomEnd),
visible = characteristicsVisibility && scrollVisibility && uiVisible,
enter = expandHorizontally(),
exit = shrinkHorizontally()
) {
Surface(
modifier = Modifier
.padding(bottom = initialScrollDP + 8.dp)
.animateContentSize(tween(1000)),
color = MaterialTheme.colors.surface.copy(alpha = 0.7f),
shape = RoundedCornerShape(topStart = cornerSize, bottomStart = cornerSize),
contentColor = MaterialTheme.colors.onSurface
) {
Column(Modifier.padding(8.dp)) {
Text(
params.puppy.race.title,
modifier = Modifier.align(Alignment.End),
style = MaterialTheme.typography.h4
)
params.puppy.race.characteristicList.forEachIndexed { index, characteristic ->
Row(Modifier.align(Alignment.End)) {
Text(characteristic.name, Modifier.padding(end = 4.dp))
RatingBar(rating = characteristic.value)
}
}
}
}
}
LazyColumn(
modifier = Modifier.clickable(
interactionSource = remember { MutableInteractionSource() },
indication = null,
onClick = { toggelUI() }
),
state = descriptionListState,
contentPadding = PaddingValues(top = maxHeight)
) {
item {
Surface(
Modifier.padding(vertical = 8.dp).clickable {
scope.launch {
descriptionListState.animateScrollToItem(0, constraints.maxHeight)
}
},
shape = RoundedCornerShape(cornerSize)
) {
Text(params.puppy.race.description, Modifier.padding(8.dp))
}
}
}
}
}
}
}