QAbstractFormBuilder Class

Detailed Description

The QAbstractFormBuilder class provides a default implementation for classes that create user interfaces at run-time.

QAbstractFormBuilder provides a standard interface and a default implementation for constructing forms from user interface files. It is not intended to be instantiated directly. Use the QFormBuilder class to create user interfaces from UI files at run-time. For example:

         MyForm::MyForm(QWidget *parent)
             : QWidget(parent)
         {
             QFormBuilder builder;
             QFile file(":/forms/myWidget.ui");
             file.open(QFile::ReadOnly);
             QWidget *myWidget = builder.load(&file, this);
             file.close();

             QVBoxLayout *layout = new QVBoxLayout;
             layout->addWidget(myWidget);
             setLayout(layout);
         }

To override certain aspects of the form builder's behavior, subclass QAbstractFormBuilder and reimplement the relevant virtual functions:

• load() handles reading of UI format files from arbitrary QIODevices, and construction of widgets from the XML data that they contain.
• save() handles saving of widget details in UI format to arbitrary QIODevices.
• workingDirectory() and setWorkingDirectory() control the directory in which forms are held. The form builder looks for other resources on paths relative to this directory.

The QFormBuilder class is typically used by custom components and applications that embed Qt Designer. Standalone applications that need to dynamically generate user interfaces at run-time use the QUiLoader, found in the QtUiTools module.