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 Desktop Packages, 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. Status in OEM Priority Project: New Status in OEM Priority Project trusty series: Triaged Status in “unity” package in Ubuntu: In Progress Status in “xorg-server” package in Ubuntu: New Bug description: When running an SDK app on the desktop, it's not possible to use the touchscreen to move windows, use the launcher, etc. The SDK app seems to consume all touchscreen events. To reproduce: 1) On a desktop/laptop with a touchscreen (I am using a Dell XPS13), install 14.04 and check that the touchscreen works for moving windows 2) Install the camera-app package from universe (I have 2.9.1+14.04.20140331-0ubuntu1) 3) Launch the camera app 4) Touch once inside the camera-app window 5) Use the touchscreen to drag the camera-app window Expected results: You can move the camera-app window using the touchscreen Actual results: You cannot move the camera-app window, or perform any other touch tasks in unity, with the touchscreen This only affects touchscreen input - mouse/touchpad input is not affected This affects all apps written with the SDK (I tried camera-app, gallery-app, reminders-app). It's 100% reproducible. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: unity 7.2.0+14.04.20140411-0ubuntu1 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu2 Architecture: amd64 CompizPlugins: [core,commands,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell] CurrentDesktop: Unity Date: Mon Apr 14 14:59:09 2014 DistributionChannelDescriptor: # This is a distribution channel descriptor # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-precise-amd64-20130203-1 EcryptfsInUse: Yes InstallationDate: Installed on 2013-12-02 (132 days ago) InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50 SourcePackage: unity UpgradeStatus: Upgraded to trusty on 2014-02-12 (61 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1307701/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
