I am having some issues with the size of qt4 widgets when their content changes. I will illustrate my problems with two simple scenarios: Scenario 1: I have a QLineEdit widget. Sometimes, when I'm changing its content using QLineEdit.setText(), the one...

One cell in each row of a QTableWidget contains a combobox for (each row in table ... ) { QComboBox* combo = new QComboBox(); table->setCellWidget(row,col,combo); combo->setCurrentIndex(node.type()); ...

One cell in each row of a QTableWidget contains a combobox for (each row in table ... ) { QComboBox* combo = new QComboBox(); table->setCellWidget(row,col,combo); combo->setCurrentIndex(node.type()); ...

I'm trying to use SVG graphics in QIcons. I have a static library that contains all my graphics resources, and a method in that static library that returns QIcons pre-loaded with the correct graphics. I'm trying to do this: QIcon icon(":/icons/find.svg")...

I have created a QDialog based app using Qt Creator and all is well other than the dialog has no minimize button. How can I add one? Is there a property in the designer that I can set?

I'm developing a simple Qt 4 app and making my own dialog. I subclassed QDialog, inserted the Q_OBJECT macro in the class declaration block, and... I get [Linker error] undefined reference to `vtable for MyDialog' and there is no moc_MyDialog.cpp g...

I'm developing a simple Qt 4 app and making my own dialog. I subclassed QDialog, inserted the Q_OBJECT macro in the class declaration block, and... I get [Linker error] undefined reference to `vtable for MyDialog' and there is no moc_MyDialog.cpp g...

Whenever I use the signal/slot editor dialog box, I have to choose from the existing list of slots. So the question is how do I create a custom named slot?

Whenever I use the signal/slot editor dialog box, I have to choose from the existing list of slots. So the question is how do I create a custom named slot?

I'm creating some graphic data displaying widget in Qt4 and I was tempted to use the QGraphicsScene for it, create QGraphicsItems for the data items etc. However, I wanted to add some layer of controls (eg. scrollbars, zoom+other buttons - I want to make...

I have a open file dialog with three filters: QString fileName = QFileDialog::getOpenFileName( this, title, directory, tr("JPEG (*.jpg *.jpeg);; TIFF (*.tif);; All files (*.*)") ); This displays a dialog with "JPEG" sele...

I have a open file dialog with three filters: QString fileName = QFileDialog::getOpenFileName( this, title, directory, tr("JPEG (*.jpg *.jpeg);; TIFF (*.tif);; All files (*.*)") ); This displays a dialog with "JPEG" sele...

We don't have a Qt plug-in installed for MSVS, and it makes me wonder how/whether it is possible to load resources (images, etc) to the application.

I have a SQLite-Database and I did it into a QSqlTableModel. To show the Database, I put that Model into a QTableView. Now I want to create a Method where the selected Rows (or the whole Line) will be copied into the QClipboard. After that I want to inse...

I have a SQLite-Database and I did it into a QSqlTableModel. To show the Database, I put that Model into a QTableView. Now I want to create a Method where the selected Rows (or the whole Line) will be copied into the QClipboard. After that I want to inse...

I want to create a program, which can encrypt and decrypt a complete file with an individual password. Is there any way to manage this in Qt and/or C++ and how?

I want to create a program, which can encrypt and decrypt a complete file with an individual password. Is there any way to manage this in Qt and/or C++ and how?

I created a QTableView with a QSqlTableModel. By standard, double-clicking on the cells will mark them and the user can edit them. I want, that the user isn't allowed to do that. He is allowed to mark the whole row by clicking on a single cell, but not to...

I created a QTableView with a QSqlTableModel. By standard, double-clicking on the cells will mark them and the user can edit them. I want, that the user isn't allowed to do that. He is allowed to mark the whole row by clicking on a single cell, but not to...

I'm very confused about using destructors in Qt4 and hope, you guys can help me. When I have a method like this (with "Des" is a class): void Widget::create() { Des *test = new Des; test->show(); } how can I make sure that this widget is goi...