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Qt-contributors-summit-2014-Graphics-tablets: Difference between revisions
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* touch enabled wacom: 3 devices in xinput | * touch enabled wacom: 3 devices in xinput | ||
* Qt: no distinction between stylus and finger/touch | * Qt: no distinction between stylus and finger/touch | ||
** - | ** -> extend proximity events to have distinction between | ||
Windows: | Windows: | ||
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* does not contain button information | * does not contain button information | ||
* does not contain keyboard modifier | * does not contain keyboard modifier | ||
* windows: wintab - | * windows: wintab -> map button | ||
TabletMove should also be sent with Hover – maybe as TabletProximityMove | TabletMove should also be sent with Hover – maybe as TabletProximityMove | ||
Revision as of 17:41, 12 March 2015
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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