The QFileOpenEvent class provides an event that will be sent when there is a request to open a file or a URL. More

Inheritance diagram of PySide6.QtGui.QFileOpenEvent




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Detailed Description#


This section contains snippets that were automatically translated from C++ to Python and may contain errors.

File open events will be sent to the QApplication::instance() when the operating system requests that a file or URL should be opened. This is a high-level event that can be caused by different user actions depending on the user’s desktop environment; for example, double clicking on an file icon in the Finder on macOS.

This event is only used to notify the application of a request. It may be safely ignored.


This class is currently supported for macOS only.

macOS Example#

In order to trigger the event on macOS, the application must be configured to let the OS know what kind of file(s) it should react on.

For example, the following Info.plist file declares that the application can act as a viewer for files with a PNG extension:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">

The following implementation of a QApplication subclass shows how to handle QFileOpenEvent to open the file that was, for example, dropped on the Dock icon of the application.

from PySide6.QtWidgets import QApplication

from PySide6.QtGui import QFileOpenEvent
from PySide6.QtWidgets import QPushButton
class MyApplication(QApplication):

# public
    MyApplication(int argc, char **argv)
    super().__init__(argc, argv)

    bool event(QEvent event) override

        if event.type() == QEvent.FileOpen:
            openEvent = QFileOpenEvent(event)
            url = openEvent.url()
            if url.isLocalFile():
                localFile = QFile(url.toLocalFile())
                # read from local file
             elif url.isValid():
                # process according to the URL's schema
                # parse openEvent->file()

        return QApplication.event(event)

Note how QFileOpenEvent::file() is not guaranteed to be the name of a local file that can be opened using QFile. The contents of the string depend on the source application.

class PySide6.QtGui.QFileOpenEvent(arg__1)#



Return type:


Returns the name of the file that the application should open.

This is not guaranteed to be the path to a local file.

PySide6.QtGui.QFileOpenEvent.openFile(file, flags)#
Return type:



This function is deprecated.

interpret the string returned by file()

Opens a QFile on the file referenced by this event in the mode specified by flags. Returns true if successful; otherwise returns false.

This is necessary as some files cannot be opened by name, but require specific information stored in this event.

Return type:


Returns the url that the application should open.