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QXcbConnection::xi2ReportTabletEvent(): get device, check capabilities

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In Qt 5, RotationStylus was a device type; in Qt 6, we have the
Rotation capability flag instead. The event does not tell us whether
rotation is valid or not, so to distinguish a valid zero value from
a zero that means it's absent, we need to check device capabilities.
Anyway it's better to get the QPointingDevice instance earlier and
call the newer version of QWindowSystemInterface::handleTabletEvent().

Fixes: QTBUG-104877
Change-Id: I896c02727d586381489f79fd4ebea3451adfa403
Pick-to: 6.2 6.3 6.4
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
This commit is contained in:
Shawn Rutledge 2022-07-11 10:26:48 +02:00
parent 03a691cecb
commit 6749d69a15
1 changed files with 7 additions and 4 deletions
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11
src/plugins/platforms/xcb/qxcbconnection_xi2.cpp
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@ -1550,6 +1550,9 @@ void QXcbConnection::xi2ReportTabletEvent(const void *event, TabletData *tabletD
double pressure = 0, rotation = 0, tangentialPressure = 0;
int xTilt = 0, yTilt = 0;
static const bool useValuators = !qEnvironmentVariableIsSet("QT_XCB_TABLET_LEGACY_COORDINATES");
const QPointingDevice *dev = QPointingDevicePrivate::tabletDevice(QInputDevice::DeviceType(tabletData->tool),
QPointingDevice::PointerType(tabletData->pointerType),
QPointingDeviceUniqueId::fromNumericId(tabletData->serialId));
// Valuators' values are relative to the physical size of the current virtual
// screen. Therefore we cannot use QScreen/QWindow geometry and should use
@ -1597,7 +1600,8 @@ void QXcbConnection::xi2ReportTabletEvent(const void *event, TabletData *tabletD
tangentialPressure = normalizedValue * 2.0 - 1.0; // Convert 0..1 range to -1..+1 range
break;
case QInputDevice::DeviceType::Stylus:
rotation = normalizedValue * 360.0 - 180.0; // Convert 0..1 range to -180..+180 degrees
if (dev->capabilities().testFlag(QInputDevice::Capability::Rotation))
rotation = normalizedValue * 360.0 - 180.0; // Convert 0..1 range to -180..+180 degrees
break;
default: // Other types of styli do not use this valuator
break;
@ -1616,11 +1620,10 @@ void QXcbConnection::xi2ReportTabletEvent(const void *event, TabletData *tabletD
local.x(), local.y(), global.x(), global.y(),
(int)tabletData->buttons, pressure, xTilt, yTilt, rotation, (int)modifiers);
QWindowSystemInterface::handleTabletEvent(window, ev->time, local, global,
int(tabletData->tool), int(tabletData->pointerType),
QWindowSystemInterface::handleTabletEvent(window, ev->time, dev, local, global,
tabletData->buttons, pressure,
xTilt, yTilt, tangentialPressure,
rotation, 0, tabletData->serialId, modifiers);
rotation, 0, modifiers);
}
QXcbConnection::TabletData *QXcbConnection::tabletDataForDevice(int id)