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<concept id="GUID-170EDC68-77C7-4FD9-A81E-C9F75698F7A3" xml:lang="en"><title>Implementing

support for scalable UI</title><shortdesc>For the correct control to receive touch events, you must implement

support for scalable UI.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>In Touch UI devices, supporting scalable UI is even more crucial than before.

Traditionally, the problem was that the application did not scale to fit the

screen size correctly.</p>

<p>For more information on scalable UI, see <xref href="GUID-B02C762B-C452-4184-ABEA-4753E6CD47D2.dita">Scalability</xref> section.</p>

<p>In Touch UI, there is also another consideration, the Symbian platform

may not receive touch events, or it may receive touch events for the incorrect

control, because there is a problem with knowing the correct location of the

touch event.</p>

<p>The following figures illustrate code required for handling scalable UI

events.</p>

<fig id="GUID-0300A264-1F48-4D4F-A3ED-18734983B36E">

<title>Scalable UI implementation in control</title>

</fig>

<fig id="GUID-39D4E25F-C4C3-4C19-BED0-42E06F63A0BD">

<title>Scalable UI implementation in UI controller</title>

</fig>

<p>For further implementation information, see <xref href="GUID-DD15F24B-0786-4531-A6C5-A5E70EBE2732.dita">Handling

layout change events</xref>.</p>

</conbody></concept>