scrollbarDrag

Type

message

Summary

Sent to a field, scrollbar, or group when the user drags the scrollbar thumb or when a text selection causes a field to scroll.

Syntax

scrollbarDrag <pNewPosition>

Description

Handle the scrollbarDrag message if you want to respond to the user dragging the scrollbar thumb: for example, to update a counter on the card.

If the user clicks one of the arrows or the gray region of the scrollbar, and the appropriate message is not handled anywhere in the message path, a scrollbarDrag message is sent. In other words, you can use a scrollbarDrag handler to handle all scrollbar movements.

If the select command is used to select text within a scrolling field, and this causes the field to scroll to bring the selected text into view, a scrollbarDrag message is sent to the field.

Parameters

Name	Type	Description
pNewPosition		The new position of the scrollbar thumb. This parameter is passed only if the object is a scrollbar.

Examples

on scrollbarDrag newValue -- display current line number
  put newValue div the textHeight of me + 1 into field "Line Number"
end scrollbarDrag

Related

command: select, group

glossary: scrollbar thumb, handle, handler, message, card, field, command

keyword: field, scrollbar, selection

message: scrollbarBeginning

property: selected

Compatibility and Support

Introduced

LiveCode 1.0

OS

mac

windows

linux

ios

android

Platforms

desktop

server

mobile