FirstVisibleIndex(Rect,Rect,Rect,Rect) Method

Gets the index of the first visible item on this axis.

Syntax

Visual Basic

'Declaration
 
Protected Overloads Overrides Function FirstVisibleIndex( _
   ByVal windowRect As Rect, _
   ByVal viewportRect As Rect, _
   ByVal effectiveViewport As Rect, _
   ByVal contentViewport As Rect _
) As Integer

C#

protected override int FirstVisibleIndex( 
   Rect windowRect,
   Rect viewportRect,
   Rect effectiveViewport,
   Rect contentViewport
)

Parameters

windowRect

The zoom window.

viewportRect

The viewport.

effectiveViewport

The effective viewport.

contentViewport

The content viewport.

Return Value

The index of the first visible item on this axis.

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2