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OS X: correct tablet airbrush tangentialPressure to range -1..1

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The driver sends values in the range 0..1, but we want the "center"
value to be 0.  This correction makes tangentialPressure consistent
between Linux, Windows and OS X.

Task-number: QTBUG-40469
Change-Id: Ia4aa777efdf015c2802b945f6ca7a8e442bbf5fc
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
This commit is contained in:
Shawn Rutledge 2014-07-28 15:06:43 +02:00
parent b5ce3d504c
commit 6c1a12c558
1 changed files with 1 additions and 1 deletions
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2
src/plugins/platforms/cocoa/qnsview.mm
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@ -1001,7 +1001,7 @@ Q_GLOBAL_STATIC(QCocoaTabletDeviceDataHash, tabletDeviceDataHash)
z = [theEvent absoluteZ];
if (deviceData.capabilityMask & 0x0800)
tangentialPressure = [theEvent tangentialPressure];
tangentialPressure = ([theEvent tangentialPressure] * 2.0) - 1.0;
rotation = [theEvent rotation];