com.gnostice.pdfone

Interface PdfViewerChangeHandler

public interface PdfViewerChangeHandler

This interface defines several run-time events related to PdfViewer.

User classes can implement this interface to get access and/or handle viewer events.

Method Summary

Modifier and Type	Method and Description
void	onChange(PdfViewer viewer, int pageNum, double zoomFacter, int rotationAngle, int pageView) Called when the viewer makes a change in the the current page number, zoom, rotation, or page fit setting.
void	onChange(PdfViewer viewer, int pageNum, double zoomFactor, int rotationAngle, int pageView, int pageLayout, int pageColumnsCustomCount, boolean showGapsBetweenPages, boolean showCoverPageDuringSideBySide, boolean showPageBordersWhenNoPageGaps) Called when the viewer changes the current page number, page zoom, page rotation, page layout, maximum number of columns per row, insets around pages, and layout of first page.
void	onDpiChange(PdfViewer viewer, int dpi) Called when the viewer changes DPI with which it displays the curent document.
void	onPageChange(PdfViewer viewer, int changedPageNum) Called when the viewer navigates to a new page.
void	onPageLayoutChange(PdfViewer viewer, int changedPageLayout) Called when the viewer changes the page layout.
void	onPageViewChange(PdfViewer viewer, int changedPageView) Called when the viewer changes the way it fits pages inside its display area.
void	onRotationChange(PdfViewer viewer, int rotationAngle) Called when the viewer changes the angle of rotation with which it displays pages.
void	onViewHistoryChange(PdfViewer viewer, boolean hasPreviousView, boolean hasNextView) Called when the viewer navigates to a new position in its navigation history.
void	onZoomChange(PdfViewer viewer, double changedZoomFacter) Called when the viewer changes its zoom level.

Method Detail

onPageChange

void onPageChange(PdfViewer viewer,
                  int changedPageNum)

Called when the viewer navigates to a new page.

Parameters:

viewer - viewer where the change occurred

changedPageNum - number of the current page

onZoomChange

void onZoomChange(PdfViewer viewer,
                  double changedZoomFacter)

Called when the viewer changes its zoom level.

Parameters:

viewer - viewer where the change occurred

changedZoomFacter - current page magnification

onPageViewChange

void onPageViewChange(PdfViewer viewer,
                      int changedPageView)

Called when the viewer changes the way it fits pages inside its display area.

Parameters:

viewer - viewer where the change occurred

changedPageView - constant specifying how the viewer currently fits page inside its display area

onPageLayoutChange

void onPageLayoutChange(PdfViewer viewer,
                        int changedPageLayout)

Called when the viewer changes the page layout.

Parameters:

viewer - viewer where the change occurred

changedPageLayout - constant specifying the current page layout

onRotationChange

void onRotationChange(PdfViewer viewer,
                      int rotationAngle)

Called when the viewer changes the angle of rotation with which it displays pages.

Parameters:

viewer - viewer where the change occurred

rotationAngle - current angle of rotation

onDpiChange

void onDpiChange(PdfViewer viewer,
                 int dpi)

Called when the viewer changes DPI with which it displays the curent document.

Parameters:

viewer - viewer where the change occurred

dpi - current DPI

onViewHistoryChange

void onViewHistoryChange(PdfViewer viewer,
                         boolean hasPreviousView,
                         boolean hasNextView)

Called when the viewer navigates to a new position in its navigation history.

Parameters:

viewer - viewer where the change occurred

hasPreviousView - whether the navigation history has a previous position currently

hasNextView - whether the navigation history has a next position currently

onChange

void onChange(PdfViewer viewer,
              int pageNum,
              double zoomFacter,
              int rotationAngle,
              int pageView)

Called when the viewer makes a change in the the current page number, zoom, rotation, or page fit setting.

Parameters:

viewer - viewer where the change occurred

pageNum - current page number

zoomFacter - current zoom level

rotationAngle - current angle of rotation

pageView - constant specifying how viewer fits pages insides its display area

onChange

void onChange(PdfViewer viewer,
              int pageNum,
              double zoomFactor,
              int rotationAngle,
              int pageView,
              int pageLayout,
              int pageColumnsCustomCount,
              boolean showGapsBetweenPages,
              boolean showCoverPageDuringSideBySide,
              boolean showPageBordersWhenNoPageGaps)

Called when the viewer changes the current page number, page zoom, page rotation, page layout, maximum number of columns per row, insets around pages, and layout of first page.

Parameters:

viewer - viewer where teh change occurred

pageNum - current page number

zoomFactor - current zoom level

rotationAngle - current angle of rotation

pageView - constant specifying how viewer fits pages pages insides its display area

pageLayout - constant specifying how viewer lays out pages inside its display area

pageColumnsCustomCount - maximum number of pages that the viewer will display in a single row, as permitted by the current zoom level

showGapsBetweenPages - whether the viewer shows insets around the pages

showCoverPageDuringSideBySide - whether the viewer displays the first page singly when page layout is set to PdfViewer.LAYOUT_SIDE_BY_SIDE

showPageBordersWhenNoPageGaps - whether viewer displays visible borders around the pages when it does not place insets around the pages