7378c709f5
On macOS, we don't deliver a press event for the first press on the track pad (Qt::WA_TouchPadAcceptSingleTouchEvents is not set by default, so Qt doesn't deliver a single-press on the track pad as a touch event - that makes some sense or at least maintains compatibility). Because of that, point 0 is never added to the finger-mapping hash. When point 0 is then released, we didn't check if we found a valid iterator for that point ID, and the example crashed. Fix this by checking that we have a valid iterator before dereferencing, and by handling Stationary events in the same way as pressed (add the point to the mapping if it's not already there). Pick-to: 6.6 6.5 Fixes: QTBUG-110266 Change-Id: I32337b801aaabf9b821a97ddc15ad78747b5e6a2 Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io> (cherry picked from commit 9d8473cdf63537dee65e9c235249b4e4901baa1a) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
Qt is supplied with a number of example applications that have been written to provide developers with examples of the Qt API in use, highlight good programming practice, and showcase features found in each of Qt's core technologies. Documentation for examples can be found in the Examples section of the Qt documentation.