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<concept id="GUID-930F1E88-2A03-4BD1-AA2A-3A0128A844BD" xml:lang="en"><title>Enabling

Multi-Touch in the Emulator Tutorial</title><shortdesc>This topic describes how to configure the Symbian emulator to enable

a multi-touch environment. </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<p><b>Variant</b>: <xref href="GUID-D93978BE-11A3-5CE3-B110-1DEAA5AD566C.dita">ScreenPlay</xref>. <b>Target

audience</b>: Application developers. </p>

<p>This topic builds on <xref href="GUID-9126A296-0301-4077-A183-3D703F77C548.dita">Multi-Touch

Support in the Emulator Overview</xref>.</p>

<section id="GUID-4F4F8E71-517D-4C5D-96A4-BB17CD49FD4C">       <title>Configuring

the emulator</title> <p>Make sure that two or more mice are plugged in and

detected on the Windows PC on which the emulator will run.  The number of

detected mice can be from two up to the maximum number defined in the HAL <codeph>HALData::EPointerMaxPointers</codeph> attribute. </p><ol>

<li id="GUID-63F317A2-E4EA-48BD-8F2B-40B54BF35EC6"><p>Add the following lines

to the <filepath>\epoc32\data\epoc.ini</filepath> file. These lines enable

ScreenPlay and multi-touch.</p><codeblock xml:space="preserve">SYMBIAN_BASE_USE_GCE ON

EnableMultiTouch ON</codeblock></li>

<li id="GUID-CA823DAB-C8C4-4E09-8491-0C0BCD57BAE4"><p>Specify the <codeph>MultiTouchProximityStep</codeph> and <codeph>MultiTouchPressureStep</codeph> values in the <filepath>\epoc32\data\epoc.ini</filepath> file to define

the proximity and pressure steps.</p><codeblock xml:space="preserve">MultiTouchProximityStep 10

MultiTouchPressureStep 200

</codeblock><p>If the above two options are not defined in the <filepath>epoc.ini</filepath> file,

the default proximity and pressure steps are taken from the following HAL

attributes.</p><codeblock xml:space="preserve">HALData::EPointer3DProximityStep

HALData::EPointer3DPressureStep</codeblock></li>

</ol><p><b>Result</b>: Launch the emulator to verify that the mice are detected

and displayed inside the application window area. When you move a mouse or

scroll the mouse wheel, its X, Y and Z values are reflected in the status

bar.</p>     </section>

<section id="GUID-44C3561D-92A1-421E-9AD3-0D8648919C46-GENID-1-10-1-12-1-1-7-1-6-1-6-1-9-1-9-1-8-1-6-1-3-4">       <title>Enabling

and disabling multi-touch</title><p>Multi-touch is only required by UI applications.

Therefore, multi-touch is enabled inside the orange rectangular area shown

on the following diagram. Inside the area two Windows pointers are displayed.

The one numbered zero is the system pointer and the other is used only for

multi-touch purposes. The first mouse to report events to the emulator is

automatically taken as the primary mouse, which owns the Windows system pointer.</p><fig id="GUID-C62E31A2-65F8-4976-A3A9-058BFE3D30D3">

<title>Multi-touch area</title>

<image href="GUID-FD0593E7-A36C-4656-A85A-9D62DFBCC42F_d0e194260_href.png" placement="inline"/>

</fig><p><b>System pointer</b>. Once the system pointer moves outside multi-touch

area, multi-touch is temporarily disabled and standard emulator pointer behavior

is resumed. This means that only one Windows system pointer is displayed and

it is controlled by both mice.</p>     <p><b>Non-system pointer</b>. If the

non-system pointer moves out of the multi-touch area, the pointer just disappears

from the screen. Disabling multi-touch is then not necessary because the system

pointer behaves normally inside the multi-touch area. Moving the non-system

pointer back into the area makes it reappear on the screen.</p>     </section>

</conbody><related-links>

<link href="GUID-9126A296-0301-4077-A183-3D703F77C548.dita"><linktext>Multi-Touch

Support in the Emulator Overview</linktext></link>