Scroll direction in Xamarin viewer

When scrolling through pages of a document in PDFViewCtrl, the scrolling direction can be changed by setting the page layout mode.

Vertical scrolling

Vertical scrolling mode (also known as continuous mode) can be enabled by setting the page presentation mode to either PDFViewCtrl.PagePresentationModes.SingleCont / pdftron.PDF.PagePresentationModes.e_single_continuous, PDFViewCtrl.PagePresentationModes.FacingCont / pdftron.PDF.PagePresentationModes.e_facing_continuous, or PDFViewCtrl.PagePresentationModes.FacingCoverCont / pdftron.PDF.PagePresentationModes.e_facing_continuous_cover.

Here's what setting the page presentation mode to vertical scrolling looks like:

Xamarin.Android	Xamarin.iOS

Java

// with PdfViewCtrlTabHostFragment2 
PdfViewCtrlSettingsManager.updateViewMode(
    activity, 
    PdfViewCtrlSettingsManager.KEY_PREF_VIEWMODE_CONTINUOUS_VALUE
); 

// with PDFViewCtrl 
pdfViewCtrl.setPagePresentationMode(
    PDFViewCtrl.PagePresentationMode.SINGLE_CONT
);

Kotlin

// with PdfViewCtrlTabHostFragment2 
PdfViewCtrlSettingsManager.updateViewMode(
    activity, 
    PdfViewCtrlSettingsManager.KEY_PREF_VIEWMODE_CONTINUOUS_VALUE
) 

// with PDFViewCtrl 
mPdfViewCtrl.pagePresentationMode = PDFViewCtrl.PagePresentationMode.SINGLE_CONT

C#

// Xamarin.Android
// with PdfViewCtrlTabHostFragment2
PdfViewCtrlSettingsManager.UpdateViewMode(activity, PdfViewCtrlSettingsManager.KeyPrefViewmodeContinuousValue);
// with PDFViewCtrl
pdfViewCtrl.PagePresentationMode = PDFViewCtrl.PagePresentationMode.SingleCont;

Horizontal scrolling

Horizontal scrolling mode (also known as non-continuous mode) can be enabled by setting the page presentation mode to either PDFViewCtrl.PagePresentationModes.Single / pdftron.PDF.PagePresentationModes.e_single_page, PDFViewCtrl.PagePresentationModes.Facing / pdftron.PDF.PagePresentationModes.e_facing, or PDFViewCtrl.PagePresentationModes.FacingCover / pdftron.PDF.PagePresentationModes.e_facing_cover.

Here's what setting the page presentation mode to horizontal scrolling looks like:

Xamarin.Android	Xamarin.iOS

Java

// with PdfViewCtrlTabHostFragment2
PdfViewCtrlSettingsManager.updateViewMode(activity, PdfViewCtrlSettingsManager.KEY_PREF_VIEWMODE_CONTINUOUS_VALUE);

// with PDFViewCtrl
pdfViewCtrl.setPagePresentationMode(PDFViewCtrl.PagePresentationMode.SINGLE_CONT);

Kotlin

// with PdfViewCtrlTabHostFragment2
PdfViewCtrlSettingsManager.updateViewMode(activity, PdfViewCtrlSettingsManager.KEY_PREF_VIEWMODE_SINGLEPAGE_VALUE)

// with PDFViewCtrl
mPdfViewCtrl.pagePresentationMode = PDFViewCtrl.PagePresentationMode.SINGLE

C#

// Xamarin.Android
// with PdfViewCtrlTabHostFragment2
PdfViewCtrlSettingsManager.UpdateViewMode(activity, PdfViewCtrlSettingsManager.KeyPrefViewmodeSinglepageValue);
// with PDFViewCtrl
pdfViewCtrl.PagePresentationMode = PDFViewCtrl.PagePresentationMode.Single;