** Description changed: - in qppmenu-qt5 in ubuntu 16.4, the AppMenuPlatformSystemTrayIcon - assumes there is only one instance of a QPlatformSystemTrayIcon: it - register the same sbus name for all the instances. In fact, there is - one instance of QPlatformSystemTrayIcon per instance of QSystemTrayIcon, - and one temporary is created for QSystemTrayIcon::isSystemTrayAvailable. + # Impact + This affects all Qt applications that use QSystemTrayIcon::isSystemTrayAvailable, in Unity environment. Confirmed examples are owncloud-client and keepassxc, but there may be more applications. + # Test Case + See the original description below for the test case in C++. - This breaks the owncloud client [issue https://github.com/owncloud/client/issues/4693 ] + # Proposed Fix + The proposed fix is identical to what was uploaded to Yakkety as version 0.3.0+16.10.20160628.1-0ubuntu1. The fix is using unique connections for all AppMenuPlatformSystemTrayIcon instances. + # Regression Potential + The fix is in Yakkety since June and in Zesty, and nobody complained so far. So it should not cause any regressions. + + ----------------------------------------------------------------------------- + in appmenu-qt5 in ubuntu 16.04, the AppMenuPlatformSystemTrayIcon assumes there is only one instance of a QPlatformSystemTrayIcon: it register the same dbus name for all the instances. In fact, there is one instance of QPlatformSystemTrayIcon per instance of QSystemTrayIcon, and one temporary is created for QSystemTrayIcon::isSystemTrayAvailable. + + This breaks the owncloud client [issue + https://github.com/owncloud/client/issues/4693 ] This example reproduces the problem: ``` #include <QtWidgets> int main(int argc, char *argv[]) { - QApplication a(argc, argv); - QImage img(64,64, QImage::Format_ARGB32); - img.fill(Qt::red); - QSystemTrayIcon sti(QIcon(QPixmap::fromImage(img))); - sti.show(); + QApplication a(argc, argv); + QImage img(64,64, QImage::Format_ARGB32); + img.fill(Qt::red); + QSystemTrayIcon sti(QIcon(QPixmap::fromImage(img))); + sti.show(); - QSystemTrayIcon::isSystemTrayAvailable(); // with this line, the QSystemTrayIcon does not appear - // comment the previous line to see that the QSystemTrayIcon works and that there is a bug in that line + QSystemTrayIcon::isSystemTrayAvailable(); // with this line, the QSystemTrayIcon does not appear + // comment the previous line to see that the QSystemTrayIcon works and that there is a bug in that line - return a.exec(); + return a.exec(); } ``` This testcase shows that the AppMenuPlatformSystemTrayIcon::~AppMenuPlatformSystemTrayIcon called by the temporary object created inside QSystemTrayIcon::isSystemTrayAvailable unregisters the icon.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1574699 Title: All QSystemTrayIcon have the same icon, and QSystemTrayIcon::isSystemTrayAvailable remove all QSystemTrayIcon To manage notifications about this bug go to: https://bugs.launchpad.net/appmenu-qt5/+bug/1574699/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
