QTapReading Class

Member Type Documentation

enum QTapReading::TapDirection

The tap direction is indicated using flags. Applications should check for the presence of a particular flag as multiple flags may be set at once.

The X, Y and Z flags allow an app to check for taps along an axis without caring about the direction.

 if (reading->tapDirection()&QTapReading::X) {
     ...
 }

The *_Pos and *_Neg flags allow checking for taps in a specific direction. Note that some devices cannot determine the direction of a tap and will set both the _Pos and _Neg flag for the detected axis. Previous versions of the API did not allow this. Applications that check for the _Pos and _Neg flags as values should be updated so they can work with all devices.

For example, if you have code like

 if (reading->tapDirection() == QTapReading::X_Pos) {
     ...
 }

you can rewrite it as

 if (reading->tapDirection()&QTapReading::X_Pos) {
     ...
 }