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use timeout instead of requestAnimationFrame in pdf scroll handler

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for simplicity as the time delay is large compared with rAF
This commit is contained in:
Brian Gough 2014-12-05 12:12:01 +00:00
parent 2074326237
commit c167e86ba5
1 changed files with 7 additions and 13 deletions
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20
services/web/public/coffee/ide/pdfng/directives/pdfViewer.coffee
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@ -18,7 +18,7 @@ define [
# App = angular.module 'pdfViewerApp', ['pdfPage', 'PDFRenderer', 'pdfHighlights']
App.controller 'pdfViewerController', ['$scope', '$q', 'PDFRenderer', '$element', 'pdfHighlights', ($scope, $q, PDFRenderer, $element, pdfHighlights) ->
App.controller 'pdfViewerController', ['$scope', '$q', '$timeout', 'PDFRenderer', '$element', 'pdfHighlights', ($scope, $q, $timeout, PDFRenderer, $element, pdfHighlights) ->
@load = () ->
$scope.document = new PDFRenderer($scope.pdfSrc, {
scale: 1,
@ -258,25 +258,19 @@ define [
#scope.$apply()
element.on 'scroll', () ->
#console.log 'scroll event', element.scrollTop(), 'adjusting?', scope.adjustingScroll
if scope.adjustingScroll
updateContainer()
scope.$apply()
scope.adjustingScroll = false
return
scope.scrolled = true
return if scope.handler?
scope.handler = requestAnimationFrame(scrollHandler)
if scope.scrollHandlerTimeout
$timeout.cancel(scope.scrollHandlerTimeout)
scope.scrollHandlerTimeout = $timeout scrollHandler, 100
scrollStart = null
SCROLL_TIMEOUT = 50
scrollHandler = (timestamp) ->
scrollStart = timestamp if !scrollStart?
progress = timestamp - scrollStart
if (progress < SCROLL_TIMEOUT)
scope.handler = requestAnimationFrame(scrollHandler)
return
scrollStart = null
scope.handler = null
scrollHandler = () ->
scope.scrollHandlerTimeout = null
updateContainer()
scope.$apply()
scope.position = ctrl.getPdfPosition()