CS000885 - Moving scrollbar thumb

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ID	CS000885	Creation date	April 7, 2008
Platform	S60 3rd Edition, FP1	Tested on devices	Nokia N95 8GB
Category	Symbian C++	Subcategory	UI

Keywords (APIs, classes, methods, functions): CEikScrollBarFrame, TAknDoubleSpanScrollBarModel, TAknDoubleSpanScrollBarModel::SetFocusPosition(), CEikScrollBarFrame::SetVFocusPosToThumbPos()

Overview

This snippet demonstrates how to move the scrollbar thumb to a certain position. This is useful, for example, after an external scroll (such as a scroll caused by program code).

This snippet can be self-signed.

MMP file

The following libraries are required:

LIBRARY  eikcoctl.lib

Header file

#include <eiksbfrm.h>  // CEikScrollBarFrame
#include <eikscrlb.h>  // TAknDoubleSpanScrollBarModel

CEikScrollBarFrame* iScrollBarFrame;
TAknDoubleSpanScrollBarModel iVModel;

Source file

The following code updates the scrollbar model and moves the vertical scrollbar thumb to a position specified by the model. The code could be written in CMyContainer::OfferKeyEventL(), for example.

// Update the model. Naturally, number 10 would be calculated, not specified
// as a magic number constant.
iVModel.SetFocusPosition(10);
// Move the scrollbar thumb to model position
iScrollBarFrame->SetVFocusPosToThumbPos(iVModel.FocusPosition());

Postconditions

The thumb of the vertical scrollbar moves to the position specified by the scrollbar model.

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