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Code Issues Releases Wiki Activity

Add animation for scrolling with buttons

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This commit is contained in:
Nikolay Lopin
2018-03-08 01:02:49 +03:00
parent 7472019422
commit a222fd0786
1 changed files with 33 additions and 18 deletions
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51
browser/main/Detail/SnippetNoteDetail.js
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@@ -62,6 +62,8 @@ class SnippetNoteDetail extends React.Component {
snippets: props.note.snippets.map((snippet) => Object.assign({}, snippet))
})
}
this.scrollToNextTabThreshold = 0.7
}
componentDidMount () {
@@ -256,14 +258,14 @@ class SnippetNoteDetail extends React.Component {
if (lastVisibleTab) {
const visiblePart = lastVisibleTab.offsetWidth + lastVisibleTab.offsetLeft - left
let scrollToTab = lastVisibleTab
if (visiblePart > lastVisibleTab.offsetWidth * 0.75 && lastVisibleTab.previousSibling) {
scrollToTab = lastVisibleTab.previousSibling
}
const isFullyVisible = visiblePart > lastVisibleTab.offsetWidth * this.scrollToNextTabThreshold
const scrollToTab = (isFullyVisible && lastVisibleTab.previousSibling)
? lastVisibleTab.previousSibling
: lastVisibleTab
// FIXME use `scrollIntoView()` instead of custom method after update to Electron2.0 (with Chrome 61)
// FIXME use `scrollIntoView()` instead of custom method after update to Electron2.0 (with Chrome 61 its possible animate the scroll)
this.moveToTab(scrollToTab)
// scrollToTab.scrollIntoView({block: 'end'})
// scrollToTab.scrollIntoView({behavior: 'smooth', inline: 'start', block: 'start'})
}
}
}
@@ -278,16 +280,15 @@ class SnippetNoteDetail extends React.Component {
})
if (lastVisibleTab) {
let scrollToTab = lastVisibleTab
const visiblePart = width + left - lastVisibleTab.offsetLeft
const isFullyVisible = visiblePart > lastVisibleTab.offsetWidth * this.scrollToNextTabThreshold
const scrollToTab = (isFullyVisible && lastVisibleTab.nextSibling)
? lastVisibleTab.nextSibling
: lastVisibleTab
if (visiblePart > lastVisibleTab.offsetWidth * 0.75 && lastVisibleTab.nextSibling) {
scrollToTab = lastVisibleTab.nextSibling
}
// FIXME use `scrollIntoView()` instead of custom method after update to Electron2.0 (with Chrome 61)
// scrollToTab.scrollIntoView({inline: 'end', block: 'end'})
// FIXME use `scrollIntoView()` instead of custom method after update to Electron2.0 (with Chrome 61 its possible animate the scroll)
this.moveToTab(scrollToTab)
// scrollToTab.scrollIntoView({behavior: 'smooth', inline: 'end', block: 'end'})
}
}
@@ -537,16 +538,28 @@ class SnippetNoteDetail extends React.Component {
moveToTab (tab) {
const easeOutCubic = t => (--t) * t * t + 1
const targetScrollChange = 50 // TODO count target value
const animationTiming = 300
const startScrollPosition = this.visibleTabs.scrollLeft
const animationTiming = 300
const scrollMoreCoeff = 1.4 // introduce coefficient, because we want to scroll a bit further to see next tab
let scrollBy = (tab.offsetLeft - startScrollPosition)
if (tab.offsetLeft > startScrollPosition) {
// if tab is on the right side and we want to show the whole tab in visible area,
// we need to include width of the tab and visible area in the formula
// ___________________________________________
// |____|_______|________|________|_show_this_|
// ↑_____________________↑
// visible area
scrollBy += (tab.offsetWidth - this.visibleTabs.offsetWidth)
}
let startTime = null
const scrollAnimation = time => {
startTime = startTime || time
const elapsed = (time - startTime) / animationTiming
this.visibleTabs.scrollLeft = startScrollPosition + easeOutCubic(elapsed) * targetScrollChange
this.visibleTabs.scrollLeft = startScrollPosition + easeOutCubic(elapsed) * scrollBy * scrollMoreCoeff
if (elapsed < 1) {
window.requestAnimationFrame(scrollAnimation)
} else {
@@ -583,8 +596,10 @@ class SnippetNoteDetail extends React.Component {
snippetIndex
}, this.getArrowsState()), () => {
if (this.state.showArrows) {
const newLeft = this.visibleTabs.offsetWidth - this.allTabs.scrollWidth
this.moveTabBarBy(newLeft)
const tabs = this.allTabs.querySelectorAll('div')
if (tabs) {
this.moveToTab(tabs[snippetIndex])
}
}
this.refs['tab-' + snippetIndex].startRenaming()
})