Qt-contributors-summit-2014-Graphics-tablets

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Linux:

• 5 ways of accessing devices
• evdev, wacom, proprietary

• touch enabled wacom: 3 devices in xinput
• Qt: no distinction between stylus and finger/touch
  • -> extend proximity events to have distinction between

Windows:

• 2 protocols
• wintab (deprecated)
• e-ink (now, originally hand writing)
• drivers potentially override each other

• lacking transformation of value ranges and rotation direction

• wintab at least has time information in the low level event

Mac:

• unknown

QTabletEvent:

• does not contain button information
• does not contain keyboard modifier
• windows: wintab -> map button

TabletMove should also be sent with Hover – maybe as TabletProximityMove

Tablets and events should have a manual test app

Stylus hover: cannot read rotation, z-coordinate, use for paning/zooming

Potentially used and worked around by many applications (also commercial).

Google doc with a list of bugs and hacks that Krita needs [docs.google.com]

And now we have the following bugs in Jira (label: qtcs14tablet)

https://bugreports.qt.io/browse/QTBUG-39458
https://bugreports.qt.io/browse/QTBUG-39459
https://bugreports.qt.io/browse/QTBUG-39581
https://bugreports.qt.io/browse/QTBUG-39579
https://bugreports.qt.io/browse/QTBUG-39578
https://bugreports.qt.io/browse/QTBUG-39573
https://bugreports.qt.io/browse/QTBUG-39572
https://bugreports.qt.io/browse/QTBUG-39571
https://bugreports.qt.io/browse/QTBUG-39570