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118
compose/snippets/src/main/java/com/example/compose/snippets/images/AnimateImageSnippets.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| /* | ||
| * Copyright 2024 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.compose.snippets.images | ||
|
|
||
| import androidx.compose.foundation.Image | ||
| import androidx.compose.foundation.layout.Box | ||
| import androidx.compose.foundation.layout.fillMaxWidth | ||
| import androidx.compose.foundation.layout.offset | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.foundation.layout.size | ||
| import androidx.compose.foundation.lazy.LazyColumn | ||
| import androidx.compose.material3.MaterialTheme | ||
| import androidx.compose.material3.Text | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.runtime.mutableFloatStateOf | ||
| import androidx.compose.runtime.mutableStateOf | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.runtime.setValue | ||
| import androidx.compose.ui.Alignment | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.geometry.Offset | ||
| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.graphics.graphicsLayer | ||
| import androidx.compose.ui.graphics.painter.ColorPainter | ||
| import androidx.compose.ui.input.nestedscroll.NestedScrollConnection | ||
| import androidx.compose.ui.input.nestedscroll.NestedScrollSource | ||
| import androidx.compose.ui.input.nestedscroll.nestedScroll | ||
| import androidx.compose.ui.tooling.preview.Preview | ||
| import androidx.compose.ui.unit.Dp | ||
| import androidx.compose.ui.unit.IntOffset | ||
| import androidx.compose.ui.unit.dp | ||
|
|
||
| // [START android_compose_images_imageresizeonscrollexample] | ||
| @Composable | ||
| fun ImageResizeOnScrollExample( | ||
| modifier: Modifier = Modifier, | ||
| maxImageSize: Dp = 300.dp, | ||
| minImageSize: Dp = 100.dp | ||
| ) { | ||
| var currentImageSize by remember { mutableStateOf(maxImageSize) } | ||
| var imageScale by remember { mutableFloatStateOf(1f) } | ||
|
|
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| val nestedScrollConnection = remember { | ||
| object : NestedScrollConnection { | ||
| override fun onPreScroll(available: Offset, source: NestedScrollSource): Offset { | ||
| // Calculate the change in image size based on scroll delta | ||
| val delta = available.y | ||
| val newImageSize = currentImageSize + delta.dp | ||
| val previousImageSize = currentImageSize | ||
|
|
||
| // Constrain the image size within the allowed bounds | ||
| currentImageSize = newImageSize.coerceIn(minImageSize, maxImageSize) | ||
| val consumed = currentImageSize - previousImageSize | ||
|
|
||
| // Calculate the scale for the image | ||
| imageScale = currentImageSize / maxImageSize | ||
|
|
||
| // Return the consumed scroll amount | ||
| return Offset(0f, consumed.value) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| Box(Modifier.nestedScroll(nestedScrollConnection)) { | ||
| LazyColumn( | ||
| Modifier | ||
| .fillMaxWidth() | ||
| .padding(15.dp) | ||
| .offset { | ||
| IntOffset(0, currentImageSize.roundToPx()) | ||
| } | ||
| ) { | ||
| // Placeholder list items | ||
| items(100, key = { it }) { | ||
| Text( | ||
| text = "Item: $it", | ||
| style = MaterialTheme.typography.bodyLarge | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| Image( | ||
| painter = ColorPainter(Color.Red), | ||
| contentDescription = "Red color image", | ||
| Modifier | ||
| .size(maxImageSize) | ||
| .align(Alignment.TopCenter) | ||
| .graphicsLayer { | ||
| scaleX = imageScale | ||
| scaleY = imageScale | ||
| // Center the image vertically as it scales | ||
| translationY = -(maxImageSize.toPx() - currentImageSize.toPx()) / 2f | ||
| } | ||
| ) | ||
| } | ||
| } | ||
| // [END android_compose_images_imageresizeonscrollexample] | ||
|
|
||
| @Preview(showBackground = true) | ||
| @Composable | ||
| private fun ImageSizeOnScrollScreenPreview() { | ||
| ImageResizeOnScrollExample() | ||
| } |
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62
compose/snippets/src/main/java/com/example/compose/snippets/text/HtmlStyling.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| /* | ||
| * Copyright 2024 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.compose.snippets.text | ||
|
|
||
| import androidx.compose.material3.Text | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.text.AnnotatedString | ||
| import androidx.compose.ui.text.SpanStyle | ||
| import androidx.compose.ui.text.TextLinkStyles | ||
| import androidx.compose.ui.text.font.FontStyle | ||
| import androidx.compose.ui.text.fromHtml | ||
| import androidx.compose.ui.text.style.TextDecoration | ||
| import androidx.compose.ui.tooling.preview.Preview | ||
|
|
||
| // [START android_compose_text_annotatedhtmlstringwithlink] | ||
| @Composable | ||
| fun AnnotatedHtmlStringWithLink( | ||
| modifier: Modifier = Modifier, | ||
| htmlText: String = """ | ||
| <h1>Jetpack Compose</h1> | ||
| <p> | ||
| Build <b>better apps</b> faster with <a href="https://www.android.com">Jetpack Compose</a> | ||
| </p> | ||
| """.trimIndent() | ||
| ) { | ||
| Text( | ||
| AnnotatedString.fromHtml( | ||
| htmlText, | ||
| linkStyles = TextLinkStyles( | ||
| style = SpanStyle( | ||
| textDecoration = TextDecoration.Underline, | ||
| fontStyle = FontStyle.Italic, | ||
| color = Color.Blue | ||
| ) | ||
| ) | ||
| ), | ||
| modifier | ||
| ) | ||
| } | ||
| // [END android_compose_text_annotatedhtmlstringwithlink] | ||
|
|
||
| @Preview(showBackground = true) | ||
| @Composable | ||
| private fun AnnotatedHtmlStringWithLinkPreview() { | ||
| AnnotatedHtmlStringWithLink() | ||
| } |
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