Application of QFileOpenEvent class in QT
QFileOpenEvent is an event class in QT that is triggered when a file is opened. By using this event class, we can know when the file is opened, and related information such as the file name. Next, we will introduce how to use the QFileOpenEvent class in detail, and provide the corresponding source code.
- Triggering of file open event
When the user selects the "Open" option through the file manager in the operating system or the right-click menu, the file open event will be triggered. At this time, the application program will receive the event and perform corresponding operations according to the file information contained in the event. It should be noted that the file open event will only be received if the application has registered the file type and can handle the file of this type.
- Introduction to the QFileOpenEvent class
The QFileOpenEvent class represents a file open event, including file name, file MIME type, file URL and other information. This class inherits from the QEvent class, so it can be used in event processing functions. Here is the constructor declaration for the class:
QFileOpenEvent(const QString &file)
Among them, the file parameter is the name of the file to open.
- Use the QFileOpenEvent class
The following example demonstrates how to use the QFileOpenEvent class to output the filename and MIME type when a file is opened.
#include <QApplication>