medvedych/harbour-books
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[app] Avoid unpleasant flicking when pages are being dragged

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This commit is contained in:
Slava Monich 2020-09-17 01:44:58 +03:00
parent 429c58efb0
commit 19c28e5c51
1 changed files with 25 additions and 23 deletions
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48
app/qml/BooksBookView.qml
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@ -177,31 +177,20 @@ SilicaFlickable {
}
onCurrentPageChanged: {
if (completed && !flicking && !scrollAnimation.running) {
if (completed && !moving && !scrollAnimation.running) {
bookViewWatcher.positionViewAtIndex(currentPage)
}
}
onFlickingChanged: {
if (!flicking) {
bookViewWatcher.updateModel()
onCurrentIndexChanged: {
if (completed && !moving && currentIndex >= 0) {
updateModel()
}
}
ListWatcher {
id: bookViewWatcher
listView: bookView
onCurrentIndexChanged: {
if (listView.completed && !listView.flicking && currentIndex >= 0) {
updateModel()
}
}
function updateModel() {
hideViews()
stackModel.currentPage = currentIndex
if (!pager.pressed) {
pager.currentPage = currentIndex
}
onMovingChanged: {
if (!moving) {
updateModel()
}
}
@ -219,7 +208,7 @@ SilicaFlickable {
rightSpaceReserved: pageTools.visible ? pageTools.rightSpaceUsed: 0
titleVisible: _currentState.title
pageNumberVisible: _currentState.page
currentPage: bookViewWatcher.currentIndex === index
currentPage: ListView.isCurrentItem
title: bookModel.title
onJumpToPage: bookView.jumpTo(page)
onPushPosition: stackModel.pushPosition(position) // bookView.jumpTo(page)
@ -261,12 +250,12 @@ SilicaFlickable {
property int jumpingTo: -1
function jumpTo(page) {
if (book && page >=0 && page !== bookViewWatcher.currentIndex) {
if (book && page >=0 && page !== currentIndex) {
jumpingTo = page
bookViewWatcher.positionViewAtIndex(page)
pager.currentPage = page
jumpingTo = -1
if (bookViewWatcher.currentIndex !== page) {
if (currentIndex !== page) {
console.log("oops, still at", currentPage)
resetPager.restart()
}
@ -291,6 +280,19 @@ SilicaFlickable {
}
}
function updateModel() {
hideViews()
stackModel.currentPage = currentIndex
if (!pager.pressed) {
pager.currentPage = currentIndex
}
}
ListWatcher {
id: bookViewWatcher
listView: bookView
}
NumberAnimation {
id: scrollAnimation
target: bookView
@ -305,8 +307,8 @@ SilicaFlickable {
id: resetPager
interval: 0
onTriggered: {
console.log("resetting pager to", bookViewWatcher.currentIndex)
pager.currentPage = bookViewWatcher.currentIndex
console.log("resetting pager to", bookView.currentIndex)
pager.currentPage = bookView.currentIndex
}
}