The manual: SELECT current_user; — user name of current execution context SELECT session_user; — session user name Meaning, session_user shows the role you connected with, and current_user shows the role you are currently operating with, for instance after calling SET role some_other_role;.
Before you start learning what qobject_cast is, you would need to know what C++’s dynamic_cast is. Dynamic cast is all about polymorphism. C++’s dynamic cast uses RTTI (Run Time Type Information) to cast an object. But qobject_cast does this without RTTI. What is dynamic cast? For example suppose we’ve got a car factory function. Like … Read more
try this: viewer.setWindowState( (windowState() & ~Qt::WindowMinimized) | Qt::WindowActive); viewer.raise(); // for MacOS viewer.activateWindow(); // for Windows it work in my project ( in my project viewer is QMainWindow): https://github.com/iptton/Rythem .
You should give a chance for this extension: https://marketplace.visualstudio.com/items?itemName=ms-vscode.cpptools With this, you can configure include paths for better IntelliSense results. Configuring includePath One way to configure e.g the QtCore module. Ctrl + Shift + p to open command palette Search for: C/Cpp: Edit Configurations You should have a new tab called: c_cpp_properties.json In configurations array … Read more
On Qt 4, try QApplication::keyboardModifiers(). The Qt 5 and Qt 6 equivalent is QGuiApplication::keyboardModifiers().
You need to set the size constraint of the layout holding all your widgets to “SetFixedSize”. Although the name doesn’t sound like it will work, it ensures that your layout will only use the space it needs. You will not have the problem like you do in your second screenshot. Example: mainLayout.setSizeConstraint(QLayout::SetFixedSize);
You can start inserting a label. Next, you right click on it an then click “change rich text…”. A new window will pop-up. Click on the figure Icon “Insert figure”. Now, you have to create a resource file. Click on the Pencil button. Next, click on the “New resource file” button. Choose a name and … Read more
For the Qt 6.5.0 release, the missing library was libxcb-cursor.so.0, resolved with sudo apt install libxcb-cursor0 With that, the sample widget and gui projects from QtCreator run correctly built with Qt 6.5.0. libxcb-cursor.so.0 wasn’t previously needed for Qt 6.4.0. I identified the missing library with this shell code for l in /path/to/Qt/6.5.0/gcc_64/lib/*.so; do echo $l; … Read more
This code equally stretches each column so that they fit the table’s width. table->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch); Docs: QHeaderView::setSectionResizeMode See resize modes here.
QProcess process; process.start(“gedit”, QStringList() << docPath); the same as above QProcess process; process.start(“gedit”, QStringList() << “/home/oDx/Documents/a.txt”); Also, read this.