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Add behavior for modifying reader buttons depending on prev/next chapters (#5305)

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Hunter Nickel 2021-06-05 08:37:21 -06:00 committed by GitHub
parent 04ebca8413
commit fdf178d4df
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1 changed files with 19 additions and 1 deletions
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20
app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt
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@ -88,6 +88,9 @@ class ReaderActivity : BaseRxActivity<ReaderActivityBinding, ReaderPresenter>()
addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
}
}
private const val ENABLED_BUTTON_IMAGE_ALPHA = 255
private const val DISABLED_BUTTON_IMAGE_ALPHA = 64
}
private val preferences: PreferencesHelper by injectLazy()
@ -587,13 +590,28 @@ class ReaderActivity : BaseRxActivity<ReaderActivityBinding, ReaderPresenter>()
/**
* Called from the presenter whenever a new [viewerChapters] have been set. It delegates the
* method to the current viewer, but also set the subtitle on the toolbar.
* method to the current viewer, but also set the subtitle on the toolbar, and
* hides or disables the reader prev/next buttons if there's a prev or next chapter
*/
fun setChapters(viewerChapters: ViewerChapters) {
binding.pleaseWait.isVisible = false
viewer?.setChapters(viewerChapters)
binding.toolbar.subtitle = viewerChapters.currChapter.chapter.name
val leftChapterObject = if (viewer is R2LPagerViewer) viewerChapters.nextChapter else viewerChapters.prevChapter
val rightChapterObject = if (viewer is R2LPagerViewer) viewerChapters.prevChapter else viewerChapters.nextChapter
if (leftChapterObject == null && rightChapterObject == null) {
binding.leftChapter.isVisible = false
binding.rightChapter.isVisible = false
} else {
binding.leftChapter.isEnabled = leftChapterObject != null
binding.leftChapter.imageAlpha = if (leftChapterObject != null) ENABLED_BUTTON_IMAGE_ALPHA else DISABLED_BUTTON_IMAGE_ALPHA
binding.rightChapter.isEnabled = rightChapterObject != null
binding.rightChapter.imageAlpha = if (rightChapterObject != null) ENABLED_BUTTON_IMAGE_ALPHA else DISABLED_BUTTON_IMAGE_ALPHA
}
// Invalidate menu to show proper chapter bookmark state
invalidateOptionsMenu()
}