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Epub page turn animation (#23)

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* Added realistic page turn animation option in epub pagination mode

* Added volume key navigation support for paginated render mode and added page turn animation to "tap to change page" and "volume button to change page"
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Aryan 2026-03-03 14:55:50 +05:30 • committed by GitHub
parent 7d26e10c07
commit 1ce353ad44
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GPG key ID: B5690EEEBB952194
6 changed files with 1203 additions and 926 deletions
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32
app/src/main/java/com/aryan/reader/epubreader/EpubReaderSystem.kt
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@ -100,10 +100,11 @@ fun Modifier.volumeScrollHandler(
currentChapterIndex: Int,
totalChapters: Int,
onScrollBy: (Int) -> Unit,
onNavigateChapter: (offset: Int, scrollTarget: ChapterScrollPosition) -> Unit
onNavigateChapter: (offset: Int, scrollTarget: ChapterScrollPosition) -> Unit,
onNextPage: () -> Unit = {},
onPrevPage: () -> Unit = {}
): Modifier = this.onPreviewKeyEvent { keyEvent ->
val shouldHandle = volumeScrollEnabled &&
renderMode == RenderMode.VERTICAL_SCROLL &&
!isTtsActive &&
!isMusicActive
@ -115,25 +116,22 @@ fun Modifier.volumeScrollHandler(
if (!isVolumeKey) return@onPreviewKeyEvent false
if (keyEvent.type == KeyEventType.KeyDown) {
val direction = if (keyEvent.nativeKeyEvent.keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) 1 else -1
val isAtBottom = (currentScrollY + currentClientHeight) >= (currentScrollHeight - 2)
val isNext = keyEvent.nativeKeyEvent.keyCode == KeyEvent.KEYCODE_VOLUME_DOWN
Timber.d("Dir: $direction, AtBottom: $isAtBottom, Y: $currentScrollY")
if (renderMode == RenderMode.VERTICAL_SCROLL) {
val direction = if (isNext) 1 else -1
val isAtBottom = (currentScrollY + currentClientHeight) >= (currentScrollHeight - 2)
if (direction == -1 && currentScrollY == 0) {
// Top -> Prev Chapter
if (currentChapterIndex > 0) {
onNavigateChapter(-1, ChapterScrollPosition.END)
}
} else if (direction == 1 && isAtBottom) {
// Bottom -> Next Chapter
if (currentChapterIndex < totalChapters - 1) {
onNavigateChapter(1, ChapterScrollPosition.START)
if (direction == -1 && currentScrollY == 0) {
if (currentChapterIndex > 0) onNavigateChapter(-1, ChapterScrollPosition.END)
} else if (direction == 1 && isAtBottom) {
if (currentChapterIndex < totalChapters - 1) onNavigateChapter(1, ChapterScrollPosition.START)
} else {
val scrollAmount = (currentClientHeight * 0.25).toInt() * direction
onScrollBy(scrollAmount)
}
} else {
// Scroll
val scrollAmount = (currentClientHeight * 0.25).toInt() * direction
onScrollBy(scrollAmount)
if (isNext) onNextPage() else onPrevPage()
}
}
true