Android Multitouch: QEvent::TouchEnd emitted ONLY if there are no more fingers on the Screen

[marco88]

Hello guys,

The QTouchEvent works perfectly with only one finger, with two fingers it works nearly as expected, i mean i receive a second TouchUpdate, but not a second TouchBegin. If i lift one of the two finger off the screen i get no TouchEnd (i get no event at all, probably because there was not a second TouchBegin), i need to remove all the two fingers for getting the TouchEnd signal, so my question is HOW can i know if one of the two finger has been lifted from the screen?

Compile platform:
Windows 8.1 64bit - Qt Creator 3.2.2 - Qt 5.3.2

Deploy platform:
Android 4.3 (Samsung Galaxy S III)

Thanks

[SGaist]

Hi and welcome to devnet,

You should add which version of Qt you are using, with which OS on which platform

[marco88]

[quote author="SGaist" date="1417818774"]Hi and welcome to devnet,

You should add which version of Qt you are using, with which OS on which platform[/quote]

Hello, thanks, post updated, let me know if anything else can be useful.

[marco88]

I found i do not get a second TouchBegin, but just another TouchUpdate when i put the second finger on the screen... Is a valuable solution splitting into 2 widgets (as i need one possible touch for a first half of the screen and one possible touch for the second half of the screen)?

[SGaist]

That's normal, added and removed fingers will get you TouchUpdate events. AFAIK, you should check the state of the TouchPoint associated to the QTouchEvent you are getting and act accordingly.

[marco88]

Sure, but i do not get the TouchUpdate when i lift/remove the second finger, that's the problem... Getting the TouchUpdate when the second finger (one of the two finger on the screen) is removed would fix all my problems...

[SGaist]

Then you may have found a bug. You should check the "bug report system":http://bugreports.qt-project.org to see if it's something known. If not please consider opening a new report providing a minimal compilable example that reproduces this behavior

[marco88]

[quote author="SGaist" date="1417991535"]Then you may have found a bug. You should check the "bug report system":http://bugreports.qt-project.org to see if it's something known. If not please consider opening a new report providing a minimal compilable example that reproduces this behavior [/quote]

Reported on the bug report system, this behaviour has been confirmed to be a bug:

https://bugreports.qt-project.org/browse/QTBUG-43177?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

[SGaist]

Thanks for the link and detailed report