Vcl.StdCtrls.TScrollBar.Scroll
Delphi
procedure Scroll(ScrollCode: TScrollCode; var ScrollPos: Integer); dynamic;
C++
DYNAMIC void __fastcall Scroll(System::Uitypes::TScrollCode ScrollCode, int &ScrollPos);
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
procedure function |
protected | Vcl.StdCtrls.pas Vcl.StdCtrls.hpp |
Vcl.StdCtrls | TScrollBar |
Description
Triggers an OnScroll event with the given ScrollCode parameter and updates the ScrollPos variable that is passed.
Scroll is a protected routine in the TScrollBar class that is used to trigger an OnScroll event, with the given ScrollCode parameter.
Scroll also updates the value of the ScrollPos variable that is passed.
The following table gives the possible values for the ScrollCode parameter.
| Value | Meaning |
|---|---|
|
scLineUp |
User clicked the top or left scroll arrow or pressed the Up or Left arrow key. |
|
scLineDown |
User clicked the bottom or right scroll arrow or pressed the Down or Right arrow key. |
|
scPageUp |
User clicked the area to the left of the thumb tab or pressed the PgUp key. |
|
scPageDown |
User clicked the area to the right of the thumb tab or pressed the PgDn key. |
|
scPosition |
User positioned the thumb tab and released it. |
|
scTrack |
User is moving the thumb tab. |
|
scTop |
User moved the thumb tab to the top or leftmost on the scroll bar. |
|
scBottom |
User moved the thumb tab to the bottom or rightmost on the scroll bar. |
|
scEndScroll |
User finished moving the thumb tab on the scroll bar. |