FMX.ListBox.TCustomListBox.ViewportPositionChange

• Up to Parent: TCustomListBox

Delphi

procedure ViewportPositionChange(const OldViewportPosition, NewViewportPosition: TPointF;  const ContentSizeChanged: Boolean); override;

C++

virtual void __fastcall ViewportPositionChange(const System::Types::TPointF &OldViewportPosition, const System::Types::TPointF &NewViewportPosition, const bool ContentSizeChanged);

Properties

Type	Visibility	Source	Unit	Parent
procedure function	protected	FMX.ListBox.pas FMX.ListBox.hpp	FMX.ListBox	TCustomListBox

Description

Executed when the viewport position changes.

FMX.ListBox.TCustomListBox.ViewportPositionChange inherits from FMX.Layouts.TCustomScrollBox.ViewportPositionChange. All content below this line refers to FMX.Layouts.TCustomScrollBox.ViewportPositionChange.

Executed when the viewport position changes.

ViewportPositionChange receives the following parameters:

• OldViewportPosition is the value that the ViewportPosition property had before it changed.
• NewViewportPosition is the new value of the ViewportPosition property.
• ContentSizeChanged indicates whether the size of the content of the viewport has changed as well (True) or not (False).

ViewportPositionChange calls the handler of the OnViewportPositionChange event.