Making the first scroll in the manga reader not show the bars and mak…

…ing it so that one can not show the bars on the first page
jakepurple13 · Sep 8, 2023 · 594dd21 · 594dd21
1 parent 7fc8509
commit 594dd21
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Showing 2 changed files with 14 additions and 4 deletions.
diff --git a/mangaworld/src/main/java/com/programmersbox/mangaworld/reader/ReadViewModel.kt b/mangaworld/src/main/java/com/programmersbox/mangaworld/reader/ReadViewModel.kt
@@ -126,7 +126,9 @@ class ReadViewModel(
         loadPages(modelPath)
     }
 
-    var showInfo by mutableStateOf(false)
+    var showInfo by mutableStateOf(true)
+
+    var firstScroll by mutableStateOf(true)
 
     fun addChapterToWatched(newChapter: Int, chapter: () -> Unit) {
         currentChapter = newChapter

diff --git a/mangaworld/src/main/java/com/programmersbox/mangaworld/reader/ReaderCompose.kt b/mangaworld/src/main/java/com/programmersbox/mangaworld/reader/ReaderCompose.kt
@@ -292,8 +292,16 @@ fun ReadView(
         activity.runOnUiThread { Toast.makeText(context, R.string.addedChapterItem, Toast.LENGTH_SHORT).show() }
     }
 
-    val listShowItems = (listState.isScrolledToTheEnd() || listState.isScrolledToTheBeginning()) && listOrPager
-    val pagerShowItems = (pagerState.currentPage == 0 || pagerState.currentPage >= pages.size) && !listOrPager
+    val listShowItems by remember { derivedStateOf { listState.isScrolledToTheEnd() && listOrPager } }
+    val pagerShowItems by remember { derivedStateOf { pagerState.currentPage >= pages.size && !listOrPager } }
+
+    val listIndex by remember { derivedStateOf { listState.layoutInfo.visibleItemsInfo.firstOrNull()?.index ?: 0 } }
+    LaunchedEffect(listIndex, pagerState.currentPage, readVm.showInfo) {
+        if (readVm.firstScroll && (listIndex > 0 || pagerState.currentPage > 0)) {
+            readVm.showInfo = false
+            readVm.firstScroll = false
+        }
+    }
 
     LaunchedEffect(pagerState) {
         snapshotFlow { pagerState.currentPage }.collect { listState.scrollToItem(it) }
@@ -303,7 +311,7 @@ fun ReadView(
         snapshotFlow { listState.firstVisibleItemIndex }.collect { pagerState.scrollToPage(it) }
     }
 
-    val showItems = readVm.showInfo || listShowItems || pagerShowItems
+    val showItems by remember { derivedStateOf { readVm.showInfo || listShowItems || pagerShowItems } }
 
     val scrollBehavior = TopAppBarDefaults.pinnedScrollBehavior(rememberTopAppBarState())