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More natural scroll behaviour

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This commit is contained in:
Paddy Xu
2017-07-23 00:44:43 +03:00
parent 86dacf6e73
commit b0e8a29f85
4 changed files with 69 additions and 6 deletions
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20
QuickLook.Plugin/QuickLook.Plugin.PDFViewer/PdfViewerControl.xaml.cs
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@@ -34,6 +34,8 @@ namespace QuickLook.Plugin.PDFViewer
{
private const double MinZoomFactor = 0.1d;
private const double MaxZoomFactor = 3d;
private int _changePageDeltaSum;
private bool _pdfLoaded;
private double _viewRenderFactor = 1d;
@@ -103,9 +105,23 @@ namespace QuickLook.Plugin.PDFViewer
const double tolerance = 0.0001d;
if (Math.Abs(pos.Y) < tolerance && delta > 0)
{
_changePageDeltaSum += delta;
if (Math.Abs(_changePageDeltaSum) < 20)
return;
PrevPage();
else if (Math.Abs(pos.Y - size.Height) < tolerance && delta < 0)
_changePageDeltaSum = 0;
}
else if (Math.Abs(pos.Y - size.Height) < tolerance && delta < -0)
{
_changePageDeltaSum += delta;
if (Math.Abs(_changePageDeltaSum) < 20)
return;
NextPage();
_changePageDeltaSum = 0;
}
}
private void NextPage()
@@ -193,7 +209,7 @@ namespace QuickLook.Plugin.PDFViewer
OnPropertyChanged("PageIds");
CurrentPage = 0;
pagePanel.DoZoomToFit(true);
pagePanel.DoZoomToFit();
}
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)