qt5.6

After updating Qt from 5.5 to 5.6 QSqlDatabase:open always returns true - even if the host is not reachable and/or username/password/database settings are set to nonsense. Test code: QSqlDatabase* db = new QSqlDatabase(QSqlDatabase::addDatabase("QMYSQL", "TESTCONNECTION")); db->setHostName(ip); db->setPort(port); db->setUserName(user); db->setPassword(pwd); db->setDatabaseName(dbName); db->setConnectOptions("MYSQL_OPT_CONNECT_TIMEOUT=4"); bool ok = db->open(); I compiled the Qt sql libs against the latest mysql version (5.6.x). This was actually a reported bug: QSqlDatabase::open always

I did not compile Qt myself, rather I used installer from official Qt website (5.6 beta is available since few days ago). Installation was successful, Qt folder conatins bin folder with qmake and everything. Building apps in Qt Creator works. However, when I try to launch Qt using VS addin 1.2.5.9 I get error No default Qt version found. Pleae check your Qt Visual Studio Add-in settings. I have edited QT5 -> Qt Options to contain the correct Qt path to 5.6 beta, error still persists. I have also added QTDIR into Path in Windows 10. I am using Community Edition of Visual Studio 2015 How to fix

I have a minimal application which uses QOpenGLWidget that integrates an OpenGL wrapper library (OpenSceneGraph). I am trying to figure out how to correctly use the Qt5.6 support for high DPI screens when dealing with OpenGL content like I use. My main() function has the following code: int main(int argc, char** argv) { // DPI support is on QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); QApplication app(argc, argv); QMainWindow window; // QOpenGLWidget with OpenSceneGraph content QtOSGWidget* widget = new QtOSGWidget(); window.setCentralWidget(widget); window.show(); return app.exec(

Today I have ported my application from Qt5.5 to Qt5.6RC. Running it on my high dpi screen the widgets appeared tiny. After reading this and setting QT_AUTO_SCREEN_SCALE_FACTOR to "1" at least it is usable again. However they say : In the longer term, the application should be adapted to run unmodified: 1) Always use the qreal versions of the QPainter drawing API. 2) Size windows and dialogs in relation to the screen size. 3) Replace hard-coded sizes in layouts and drawing code by values calculated from font metrics or screen size. Not all style sheet attributes support em (".. from font

In Ubuntu 15.04 64 bits I installed Qt5.6 (online installer) and while trying to move my development environment from Windows 7 to Linux I faced the following: SqlDatabase: QMYSQL driver not loaded Following this , I managed to find ~/Qt/5.6/gcc_64/plugins/sqldrivers/libqsqlmysql.so and then: $ ldd libqsqlmysql.so linux-vdso.so.1 => (0x00007ffffd571000) libmysqlclient_r.so.16 => not found libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fe94ef24000) libcrypt.so.1 => /lib/x86_64-linux-gnu/libcrypt.so.1 (0x00007fe94ecec000) libnsl.so.1 => /lib/x86_64-linux-gnu/libnsl.so.1 (0x00007fe94ead2000