PDFTron WebViewer HTML5

Class: DisplayMode

CoreControls. DisplayMode

Represents a Display Mode.

new DisplayMode(docViewer, mode, scrollable)

Constructs a new Display Mode that specifies how the pages are displayed on the screen

Parameters:
Name Type Description
docViewer object

The DocumentViewer instance
mode object

The display mode type
scrollable boolean

Whether the display mode is scrollable or not

Methods

getPageOffset(pageIndex)

Returns the amount the page is offset from its container

Parameters:
Name Type Description
pageIndex number

The index of the page
Returns:

An object with x and y properties of the amount the page is offset from its container

Type
object

getPageTransform(pageIndex)

Returns the amount the page is shifted relative to the viewport

Parameters:
Name Type Description
pageIndex number

The index of the page
Returns:

An object with x and y properties of the amount the page is shifted relative to the viewport and width and height properties of the page.

Type
object

getSelectedPages(mousePt1, mousePt2)

Gets the indexes of the first and last pages selected.

Parameters:
Name Type Description
mousePt1 object

The starting mouse point, an object with x and y properties
mousePt2 object

The ending mouse point, an object with x and y properties
Returns:

An object with a 'first' property being the first page selected and a 'last' property being the last page selected. last must be >= first.

Type
object

getVisiblePages( [amountAhead] [, amountSide])

Returns an array of page indexes that are visible on screen.

Parameters:
Name Type Argument Description
amountAhead number <optional>

The amount of space ahead of the viewport to count as visible as a multiple of the screen height (default is 0.5)
amountSide number <optional>

The amount of space to the side of the viewport to count as visible as a multiple of the screen height (default is 0.5)
Returns:

an array of 0-indexed page numbers.

Type
Array.<number>

pageToWindow(pagePt, pageIndex)

Converts page coordinates to window coordinates.

Parameters:
Name Type Description
pagePt object

A object with x and y properties in page coordinates
pageIndex number

The page index
Returns:

An object with the page index as well as x and y values in window coordinates

Type
object

setCustomFunctions()

Sets callbacks to provide custom functionality when in custom display mode

Parameters:
Name Type Description
fns.pageToWindow

transform coordinates relative to a document page to coordinates relative to the viewer div
fns.windowToPage

transform coordinates relative to the viewer div relative to a document page
fns.getSelectedPages

returns an array of currently selected page indices
fns.getVisiblePages

returns an array of currently visible pages
fns.getPageTransform

returns the offsets of a page container
fns.createPageSections

lays out pageSection and pageContainer divs to DocumentViewer can put content in them

setParameters(nCols, nRows, currentRow, startRow, endRow)

Sets parameters of the display mode

Parameters:
Name Type Description
nCols number

The number of columns
nRows number

The number of rows
currentRow number

The current row to be displayed
startRow number

The starting row to have in the DOM
endRow number

The ending row to have in the DOM

windowToPage(windowPt, pageIndex)

Converts window coordinates to page coordinates.

Parameters:
Name Type Description
windowPt object

A object with x and y properties in window coordinates
pageIndex number

The page index
Returns:

An object with the page index as well as x and y values in page coordinates

Type
object