Excerpt from #xorg-devel: """ <dandrader> daniels, I've the following situation: clientX has a XISelectEvents(TouchBegin|Update|End, childWindowA, slaveDevice1); clientY has a XIPassiveGrabDevice(TouchBegin|Update|End|Ownership, rootWindow, AllMasterDevices) daniels, when a touch reaches xserver, it sends touch events to both clientX and clientY <daniels> dandrader: yes, events are delivered separately thorough master and slaves - i'd recommend not using slaves for anything at all <dandrader> daniels, but I believe it should send only to clientY, and only once clientY rejects the touch sequence should clientX finally start receiving the touch events (replayed), right? <daniels> dandrader: if both clients were listening on a master device, then you'd be right <dandrader> daniels, hmm got it. so what I'm seeing is the expected behavior then and I should modify clientX to select events on AllMasterDevices instead of on slaveDevice1 daniels, is that it? <daniels> dandrader: exactly """
So we have two problems here: 1- touch ownership mechanics won't work in our situation as Qt is talking directly to the slave devices whereas unity7 is talking to the master devices. 2- the xserver bug described in my previous comments where it gets confused with such situation and ends up with a borked internal state which ruins mouse pointer emulation So if we could avoid the situation in item 1 (by changing either Qt or unity7/"Open Input Fw Grail" code) we might (have to try it out to see) circumvent the bug in item 2. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1307701 Title: xserver mouse pointer emulation from touch breaks with QML app. To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1307701/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
