ImageViewer: Visual improvements (#2851)

experimental/examples/imageviewer/shared/src/androidMain/kotlin/example/imageviewer/platform.android.kt

@@ -1,6 +1,7 @@
 package example.imageviewer
 
+import androidx.compose.foundation.layout.displayCutoutPadding
+import androidx.compose.foundation.layout.statusBarsPadding
 import androidx.compose.ui.Modifier
-import androidx.compose.foundation.layout.*
 
 actual fun Modifier.notchPadding(): Modifier = displayCutoutPadding().statusBarsPadding()

experimental/examples/imageviewer/shared/src/androidMain/kotlin/example/imageviewer/utils/GraphicsMath.android.kt

@@ -1,7 +1,11 @@
 package example.imageviewer.utils
 
 import android.content.Context
-import android.graphics.*
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.ColorMatrix
+import android.graphics.ColorMatrixColorFilter
+import android.graphics.Paint
 import android.renderscript.Allocation
 import android.renderscript.Element
 import android.renderscript.RenderScript
@@ -49,7 +53,7 @@ fun applyPixelFilter(bitmap: Bitmap): Bitmap {
     var result: Bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true)
     val w: Int = bitmap.width
     val h: Int = bitmap.height
-    result = scaleBitmapAspectRatio(result, w / 20, h / 20)
+    result = scaleBitmapAspectRatio(result, w / 4, h / 4)
     result = scaleBitmapAspectRatio(result, w, h)
 
     return result
@@ -67,7 +71,7 @@ fun applyBlurFilter(bitmap: Bitmap, context: Context): Bitmap {
     val theIntrinsic: ScriptIntrinsicBlur =
         ScriptIntrinsicBlur.create(renderScript, Element.U8_4(renderScript))
 
-    theIntrinsic.setRadius(25f)
+    theIntrinsic.setRadius(3f)
     theIntrinsic.setInput(tmpIn)
     theIntrinsic.forEach(tmpOut)
 

experimental/examples/imageviewer/shared/src/commonMain/kotlin/example/imageviewer/ImageViewer.common.kt

@@ -2,23 +2,23 @@ package example.imageviewer
 
 import androidx.compose.animation.AnimatedContent
 import androidx.compose.animation.ExperimentalAnimationApi
+import androidx.compose.animation.core.tween
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
 import androidx.compose.animation.slideInHorizontally
 import androidx.compose.animation.slideOutHorizontally
 import androidx.compose.animation.with
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.Surface
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.collectAsState
-import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import example.imageviewer.model.CameraPage
 import example.imageviewer.model.FullScreenPage
 import example.imageviewer.model.GalleryPage
-import example.imageviewer.model.PhotoGallery
 import example.imageviewer.model.MemoryPage
 import example.imageviewer.model.Page
+import example.imageviewer.model.PhotoGallery
 import example.imageviewer.model.bigUrl
 import example.imageviewer.view.CameraScreen
 import example.imageviewer.view.FullscreenImage
@@ -48,8 +48,14 @@ internal fun ImageViewerCommon(
             val previousIdx = initialState.index
             val currentIdx = targetState.index
             val multiplier = if (previousIdx < currentIdx) 1 else -1
+            if (initialState.value is GalleryPage && targetState.value is MemoryPage) {
+                fadeIn() with fadeOut(tween(durationMillis = 500, 500))
+            } else if (initialState.value is MemoryPage && targetState.value is GalleryPage) {
+                fadeIn() with fadeOut(tween(delayMillis = 150))
+            } else {
                 slideInHorizontally { w -> multiplier * w } with
                         slideOutHorizontally { w -> multiplier * -1 * w }
+            }
         }) { (index, page) ->
             when (page) {
                 is GalleryPage -> {
@@ -82,6 +88,7 @@ internal fun ImageViewerCommon(
                     MemoryScreen(
                         memoryPage = page,
                         photoGallery = photoGallery,
+                        getImage = { dependencies.imageRepository.loadContent(it.bigUrl) },
                         localization = dependencies.localization,
                         onSelectRelatedMemory = { galleryId ->
                             navigationStack.push(MemoryPage(galleryId))

experimental/examples/imageviewer/shared/src/commonMain/kotlin/example/imageviewer/model/Page.kt

@@ -25,14 +25,23 @@ class GalleryPage(
     var galleryStyle by mutableStateOf(GalleryStyle.SQUARES)
 
     fun toggleGalleryStyle() {
-        galleryStyle = if(galleryStyle == GalleryStyle.SQUARES) GalleryStyle.LIST else GalleryStyle.SQUARES
+        galleryStyle =
+            if (galleryStyle == GalleryStyle.SQUARES) GalleryStyle.LIST else GalleryStyle.SQUARES
     }
 
     var currentPictureIndex by mutableStateOf(0)
 
     val picture get(): Picture? = photoGallery.galleryStateFlow.value.getOrNull(currentPictureIndex)?.picture
 
-    val pictureId get(): GalleryId? = photoGallery.galleryStateFlow.value.getOrNull(currentPictureIndex)?.id
+    val galleryEntry: GalleryEntryWithMetadata?
+        get() = photoGallery.galleryStateFlow.value.getOrNull(
+            currentPictureIndex
+        )
+
+    val pictureId
+        get(): GalleryId? = photoGallery.galleryStateFlow.value.getOrNull(
+            currentPictureIndex
+        )?.id
 
     fun nextImage() {
         currentPictureIndex =

experimental/examples/imageviewer/shared/src/commonMain/kotlin/example/imageviewer/style/Palette.kt

@@ -27,7 +27,7 @@ object ImageviewerColors {
 
     val fullScreenImageBackground = Color(0xFF19191C)
 
-    val uiLightBlack = Color(25, 25, 28, 128)
+    val uiLightBlack = Color(25, 25, 28, 180)
     val textOnImage = Color.White
     val noteBlockBackground = Color(0xFFF3F3F4)
 

experimental/examples/imageviewer/shared/src/commonMain/kotlin/example/imageviewer/view/GalleryScreen.kt

@@ -10,10 +10,7 @@ import androidx.compose.foundation.lazy.grid.GridCells
 import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
 import androidx.compose.foundation.lazy.grid.itemsIndexed
 import androidx.compose.foundation.shape.CircleShape
-import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.TopAppBar
-import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
@@ -31,7 +28,6 @@ import example.imageviewer.model.GalleryId
 import example.imageviewer.model.GalleryPage
 import example.imageviewer.model.PhotoGallery
 import example.imageviewer.model.bigUrl
-import example.imageviewer.notchPadding
 import example.imageviewer.style.ImageviewerColors
 import org.jetbrains.compose.resources.ExperimentalResourceApi
 import org.jetbrains.compose.resources.painterResource
@@ -42,6 +38,7 @@ enum class GalleryStyle {
     LIST
 }
 
+@OptIn(ExperimentalResourceApi::class)
 @Composable
 internal fun GalleryScreen(
     galleryPage: GalleryPage,
@@ -64,7 +61,7 @@ internal fun GalleryScreen(
         Box {
             PreviewImage(
                 getImage = { dependencies.imageRepository.loadContent(it.bigUrl) },
-                picture = galleryPage.picture, onClick = {
+                picture = galleryPage.galleryEntry, onClick = {
                     galleryPage.pictureId?.let(onClickPreviewPicture)
                 }
             )
@@ -77,7 +74,7 @@ internal fun GalleryScreen(
                 },
             )
         }
-        Box(Modifier.fillMaxSize(), contentAlignment = Alignment.BottomCenter) {
+        Box(Modifier.fillMaxSize(), contentAlignment = Alignment.TopCenter) {
             when (galleryPage.galleryStyle) {
                 GalleryStyle.SQUARES -> SquaresGalleryView(
                     pictures,
@@ -107,7 +104,7 @@ private fun SquaresGalleryView(
     onSelect: (GalleryId) -> Unit,
 ) {
     Column {
-        Spacer(Modifier.height(1.dp))
+        Spacer(Modifier.height(4.dp))
         LazyVerticalGrid(
             columns = GridCells.Adaptive(minSize = 130.dp),
             verticalArrangement = Arrangement.spacedBy(1.dp),
@@ -128,8 +125,8 @@ private fun SquaresGalleryView(
 
 @OptIn(ExperimentalResourceApi::class)
 @Composable
-private fun MakeNewMemoryMiniature(onClick: () -> Unit) {
+private fun BoxScope.MakeNewMemoryMiniature(onClick: () -> Unit) {
-    Column {
+    Column(modifier = Modifier.align(Alignment.BottomCenter)) {
         Box(
             Modifier
                 .clip(CircleShape)
@@ -206,6 +203,7 @@ private fun ListGalleryView(
     ScrollableColumn(
         modifier = Modifier.fillMaxSize()
     ) {
+        Spacer(modifier = Modifier.height(10.dp))
         for ((idx, picWithThumb) in pictures.withIndex()) {
             val (galleryId, picture, miniature) = picWithThumb
             Miniature(

experimental/examples/imageviewer/shared/src/commonMain/kotlin/example/imageviewer/view/MemoryScreen.kt

@@ -29,6 +29,7 @@ import example.imageviewer.model.GalleryEntryWithMetadata
 import example.imageviewer.model.GalleryId
 import example.imageviewer.model.MemoryPage
 import example.imageviewer.model.PhotoGallery
+import example.imageviewer.model.Picture
 import example.imageviewer.style.ImageviewerColors
 import org.jetbrains.compose.resources.ExperimentalResourceApi
 import org.jetbrains.compose.resources.painterResource
@@ -38,6 +39,7 @@ import org.jetbrains.compose.resources.painterResource
 internal fun MemoryScreen(
     memoryPage: MemoryPage,
     photoGallery: PhotoGallery,
+    getImage: suspend (Picture) -> ImageBitmap,
     localization: Localization,
     onSelectRelatedMemory: (GalleryId) -> Unit,
     onBack: () -> Unit,
@@ -45,6 +47,10 @@ internal fun MemoryScreen(
 ) {
     val pictures by photoGallery.galleryStateFlow.collectAsState()
     val picture = pictures.first { it.id == memoryPage.galleryId }
+    var headerImage by remember(picture) { mutableStateOf(picture.thumbnail) }
+    LaunchedEffect(picture) {
+        headerImage = getImage(picture.picture)
+    }
     Box {
         val scrollState = memoryPage.scrollState
         Column(
@@ -62,19 +68,10 @@ internal fun MemoryScreen(
                     },
                 contentAlignment = Alignment.Center
             ) {
-                MemoryHeader(picture.thumbnail, onClick = { onHeaderClick(memoryPage.galleryId) })
+                MemoryHeader(headerImage, onClick = { onHeaderClick(memoryPage.galleryId) })
             }
             Box(modifier = Modifier.background(MaterialTheme.colorScheme.background)) {
                 Column {
-                    Headliner("Place")
-                    val locationShape = RoundedCornerShape(10.dp)
-                    LocationVisualizer(
-                        Modifier.padding(horizontal = 12.dp)
-                            .clip(locationShape)
-                            .border(1.dp, Color.Gray, locationShape)
-                            .fillMaxWidth()
-                            .height(200.dp)
-                    )
                     Headliner("Note")
                     Collapsible(
                         """
@@ -87,6 +84,15 @@ internal fun MemoryScreen(
                     )
                     Headliner("Related memories")
                     RelatedMemoriesVisualizer(pictures, onSelectRelatedMemory)
+                    Headliner("Place")
+                    val locationShape = RoundedCornerShape(10.dp)
+                    LocationVisualizer(
+                        Modifier.padding(horizontal = 12.dp)
+                            .clip(locationShape)
+                            .border(1.dp, Color.Gray, locationShape)
+                            .fillMaxWidth()
+                            .height(200.dp)
+                    )
                     Spacer(Modifier.height(50.dp))
                     Row(
                         modifier = Modifier.fillMaxWidth(),
@@ -130,13 +136,7 @@ internal fun MemoryScreen(
 @Composable
 private fun MemoryHeader(bitmap: ImageBitmap, onClick: () -> Unit) {
     val interactionSource = remember { MutableInteractionSource() }
-    val shadowTextStyle = LocalTextStyle.current.copy(
+
-        shadow = Shadow(
-            color = Color.Black,
-            offset = Offset(4f, 4f),
-            blurRadius = 4f
-        )
-    )
     Box(modifier = Modifier.clickable(interactionSource, null, onClick = { onClick() })) {
         Image(
             bitmap,
@@ -144,30 +144,55 @@ private fun MemoryHeader(bitmap: ImageBitmap, onClick: () -> Unit) {
             contentScale = ContentScale.Crop,
             modifier = Modifier.fillMaxSize()
         )
+        MagicButtonOverlay(onClick)
+        MemoryTextOverlay()
+    }
+}
+
+@OptIn(ExperimentalResourceApi::class)
+@Composable
+internal fun BoxScope.MagicButtonOverlay(onClick: () -> Unit) {
+    Column(
+        modifier = Modifier.align(Alignment.BottomEnd).padding(end = 12.dp, bottom = 16.dp)
+    ) {
+        CircularButton(painterResource("magic.png"), onClick)
+    }
+}
+
+@Composable
+internal fun BoxScope.MemoryTextOverlay() {
+    val shadowTextStyle = LocalTextStyle.current.copy(
+        shadow = Shadow(
+            color = Color.Black.copy(0.75f),
+            offset = Offset(0f, 0f),
+            blurRadius = 4f
+        )
+    )
     Column(
         modifier = Modifier.align(Alignment.BottomStart).padding(start = 12.dp, bottom = 16.dp)
     ) {
         Text(
-                "Your Memory",
+            "28. Feb",
             textAlign = TextAlign.Left,
             color = Color.White,
             fontSize = 20.sp,
+            lineHeight = 22.sp,
             modifier = Modifier.fillMaxWidth(),
             fontWeight = FontWeight.SemiBold,
             style = shadowTextStyle
         )
-            Spacer(Modifier.height(5.dp))
+        Spacer(Modifier.height(1.dp))
-
         Text(
-                "19th of April 2023",
+            "London",
             textAlign = TextAlign.Left,
             color = Color.White,
+            fontSize = 14.sp,
+            lineHeight = 16.sp,
             fontWeight = FontWeight.Normal,
             style = shadowTextStyle
         )
     }
 }
-}
 
 @Composable
 internal fun Collapsible(s: String) {
@@ -176,7 +201,7 @@ internal fun Collapsible(s: String) {
     val text = if (isCollapsed) s.lines().first() + "... (see more)" else s
     Text(
         text,
-        fontSize = 12.sp,
+        fontSize = 16.sp,
         modifier = Modifier
             .padding(10.dp, 0.dp)
             .clip(RoundedCornerShape(10.dp))
@@ -190,7 +215,8 @@ internal fun Collapsible(s: String) {
             )
             .clickable(interactionSource = interctionSource, indication = null) {
                 isCollapsed = !isCollapsed
-            },
+            }
+            .fillMaxWidth(),
     )
 }
 
@@ -212,7 +238,6 @@ internal fun RelatedMemoriesVisualizer(
 ) {
     Box(
         modifier = Modifier.padding(10.dp, 0.dp).clip(RoundedCornerShape(10.dp)).fillMaxWidth()
-            .height(200.dp)
     ) {
         LazyRow(
             modifier = Modifier.fillMaxSize(),

experimental/examples/imageviewer/shared/src/commonMain/kotlin/example/imageviewer/view/PreviewImage.common.kt

@@ -1,15 +1,15 @@
 package example.imageviewer.view
 
 import androidx.compose.animation.AnimatedContent
+import androidx.compose.animation.AnimatedContentScope
 import androidx.compose.animation.ExperimentalAnimationApi
-import androidx.compose.animation.core.Spring
+import androidx.compose.animation.core.FastOutSlowInEasing
-import androidx.compose.animation.core.spring
+import androidx.compose.animation.core.tween
-import androidx.compose.animation.slideInHorizontally
-import androidx.compose.animation.slideOutHorizontally
 import androidx.compose.animation.with
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.interaction.MutableInteractionSource
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -27,44 +27,46 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.ImageBitmap
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.unit.dp
+import example.imageviewer.model.GalleryEntryWithMetadata
 import example.imageviewer.model.Picture
 
 @OptIn(ExperimentalAnimationApi::class)
 @Composable
 internal fun PreviewImage(
-    picture: Picture?,
+    picture: GalleryEntryWithMetadata?,
     onClick: () -> Unit,
     getImage: suspend (Picture) -> ImageBitmap
 ) {
-    Box(Modifier.fillMaxWidth().height(393.dp).background(Color.Black), contentAlignment = Alignment.Center) {
+    val interactionSource = remember { MutableInteractionSource() }
     Box(
-            modifier = Modifier.fillMaxSize()
+        Modifier.fillMaxWidth().height(393.dp).background(Color.Black),
-                .clickable { onClick() },
+        contentAlignment = Alignment.Center
+    ) {
+        Box(
+            modifier = Modifier
+                .fillMaxSize()
+                .clickable(interactionSource, indication = null, onClick = onClick),
         ) {
             AnimatedContent(
                 targetState = picture,
                 transitionSpec = {
-                    slideInHorizontally(
+                    slideIntoContainer(
-                        initialOffsetX = { it }, animationSpec = spring(
+                        towards = AnimatedContentScope.SlideDirection.Left,
-                            dampingRatio = Spring.DampingRatioLowBouncy,
+                        animationSpec = tween(durationMillis = 500, easing = FastOutSlowInEasing)
-                            stiffness = Spring.StiffnessLow
+                    ) with slideOutOfContainer(
-                        )
+                        towards = AnimatedContentScope.SlideDirection.Left,
-                    ) with slideOutHorizontally(
+                        animationSpec = tween(durationMillis = 500, easing = FastOutSlowInEasing)
-                        targetOffsetX = { -it }, animationSpec = spring(
-                            dampingRatio = Spring.DampingRatioLowBouncy,
-                            stiffness = Spring.StiffnessLow
                     )
-                    )
-//                    slideInVertically(initialOffsetY = { it }) with slideOutVertically(targetOffsetY = { -it })
                 }
             ) { currentPicture ->
-                var image by remember(currentPicture) { mutableStateOf<ImageBitmap?>(null) }
+                var image by remember(currentPicture) { mutableStateOf(currentPicture?.thumbnail) }
                 LaunchedEffect(currentPicture) {
                     if (currentPicture != null) {
-                        image = getImage(currentPicture)
+                        image = getImage(currentPicture.picture)
                     }
                 }
                 if (image != null) {
+                    Box(Modifier.fillMaxSize()) {
                         Image(
                             bitmap = image!!,
                             contentDescription = null,
@@ -72,14 +74,14 @@ internal fun PreviewImage(
                                 .fillMaxSize(),
                             contentScale = ContentScale.Crop
                         )
+                        MemoryTextOverlay()
+                    }
                 } else {
                     Spacer(
                         modifier = Modifier.fillMaxSize()
-
                     )
                 }
             }
         }
     }
-
 }

experimental/examples/imageviewer/shared/src/desktopMain/kotlin/example/imageviewer/plarfom.desktop.kt

@@ -1,5 +0,0 @@
-package example.imageviewer
-
-import androidx.compose.ui.Modifier
-
-actual fun Modifier.notchPadding(): Modifier = this

experimental/examples/imageviewer/shared/src/desktopMain/kotlin/example/imageviewer/platform.desktop.kt

@@ -0,0 +1,7 @@
+package example.imageviewer
+
+import androidx.compose.foundation.layout.padding
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+actual fun Modifier.notchPadding(): Modifier = Modifier.padding(top = 12.dp)

experimental/examples/imageviewer/shared/src/desktopMain/kotlin/example/imageviewer/utils/GraphicsMath.desktop.kt

@@ -51,7 +51,7 @@ fun applyPixelFilter(bitmap: BufferedImage): BufferedImage {
     val w: Int = bitmap.width
     val h: Int = bitmap.height
 
-    var result = scaleBitmapAspectRatio(bitmap, w / 20, h / 20)
+    var result = scaleBitmapAspectRatio(bitmap, w / 4, h / 4)
     result = scaleBitmapAspectRatio(result, w, h)
 
     return result
@@ -65,8 +65,8 @@ fun applyBlurFilter(bitmap: BufferedImage): BufferedImage {
     graphics.drawImage(bitmap, 0, 0, null)
     graphics.dispose()
 
-    val radius = 11
+    val radius = 3
-    val size = 11
+    val size = 3
     val weight: Float = 1.0f / (size * size)
     val matrix = FloatArray(size * size)
 

experimental/examples/imageviewer/shared/src/desktopMain/kotlin/example/imageviewer/view/ImageViewer.desktop.kt

@@ -58,7 +58,7 @@ fun ApplicationScope.ImageViewerDesktop() {
         title = "Image Viewer",
         state = WindowState(
             position = WindowPosition.Aligned(Alignment.Center),
-            size = getPreferredWindowSize(800, 1000)
+            size = getPreferredWindowSize(720, 857)
         ),
         icon = painterResource("ic_imageviewer_round.png"),
         // https://github.com/JetBrains/compose-jb/issues/2741

experimental/examples/imageviewer/shared/src/iosMain/kotlin/example/imageviewer/utils/GraphicsMath.ios.kt

@@ -1,6 +1,15 @@
 package example.imageviewer.utils
 
-import org.jetbrains.skia.*
+import org.jetbrains.skia.Bitmap
+import org.jetbrains.skia.Canvas
+import org.jetbrains.skia.ColorAlphaType
+import org.jetbrains.skia.ColorInfo
+import org.jetbrains.skia.ColorType
+import org.jetbrains.skia.FilterTileMode
+import org.jetbrains.skia.Image
+import org.jetbrains.skia.ImageFilter
+import org.jetbrains.skia.ImageInfo
+import org.jetbrains.skia.Paint
 
 fun scaleBitmapAspectRatio(
 	bitmap: Bitmap,
@@ -50,7 +59,7 @@ fun applyPixelFilter(bitmap: Bitmap): Bitmap {
 	val width = bitmap.width
 	val height = bitmap.height
 
-	var result = scaleBitmapAspectRatio(bitmap, width / 20, height / 20)
+	var result = scaleBitmapAspectRatio(bitmap, width / 4, height / 4)
 	result = scaleBitmapAspectRatio(result, width, height)
 
 	return result
@@ -61,7 +70,7 @@ fun applyBlurFilter(bitmap: Bitmap): Bitmap {
 		allocN32Pixels(bitmap.width, bitmap.height)
 	}
 	val blur = Paint().apply {
-		imageFilter = ImageFilter.makeBlur(10f, 10f, FilterTileMode.CLAMP)
+		imageFilter = ImageFilter.makeBlur(3f, 3f, FilterTileMode.CLAMP)
 	}
 
 	val canvas = Canvas(result)