Pyqt close window event

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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. For example, in Tkinter we can do something like this:.

Override the closeEvent method of QWidget in your main window. Another possibility is to use the QApplication 's aboutToQuit signal like this:.

Learn more. Asked 8 years, 2 months ago. Active 2 years, 7 months ago. Viewed 41k times. SaulTigh SaulTigh 2 2 gold badges 12 12 silver badges 27 27 bronze badges. Active Oldest Votes. Oleh Prypin Oleh Prypin Note that this will not work in the main thread is busy calculating. One should move the calculations to another thread to be able to close the window.

That is the point: you define it as a custom handler. Is it possible to connect aboutToQuit from inside a separate file that only subclasses the MainWindow, as is the standard workflow using Qt Designer to define the.

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Linked 0. Related Hot Network Questions. Question feed. Stack Overflow works best with JavaScript enabled.The QCloseEvent class contains parameters that describe a close event.

pyqt close window event

More …. They are also sent when you call close to close a widget programmatically. Close events contain a flag that indicates whether the receiver wants the widget to be closed or not.

If it refuses to accept the close event nothing happens. Under X11 it is possible that the window manager will forcibly close the window; but at the time of writing we are not aware of any window manager that does this. The event handler closeEvent receives close events. The default implementation of this event handler accepts the close event.

If you do not want your widget to be hidden, or want some special handling, you should reimplement the event handler and ignore the event.

Close a window in PyQt5 in Python

The closeEvent in the Application example shows a close event handler that asks whether to save a document before closing. This is very useful for independent top-level windows in a multi-window application. QObject s emits the destroyed signal when they are deleted.

If the last top-level window is closed, the lastWindowClosed signal is emitted. Documentation contributions included herein are the copyrights of their respective owners. Qt and respective logos are trademarks of The Qt Company Ltd. All other trademarks are property of their respective owners.

Qt for Python 5. See also close hide destroyed exec quit lastWindowClosed. See also accept.You can find the explanation and implementation Switch between self. Hi, The below written code can help you Hi Mike. First, read both the csv You can also use the random library's You can simply the built-in function in Already have an account? Sign in. Home Community Categories Python How to close a window, and then reinitialize it How to close a window, and then reinitialize it using PyQt.

WindowStaysOnTopHint self. QVBoxLayout self lay. QPushButton 'Close' self. QPushButton self. QPushButton 'Button No. QApplication sys.

WindowMinimized QtCore. WindowActive this will activate the window w. Your comment on this question: Your name to display optional : Email me at this address if a comment is added after mine: Email me if a comment is added after mine Privacy: Your email address will only be used for sending these notifications. No answer to this question. Be the first to respond. Your answer Your name to display optional : Email me at this address if my answer is selected or commented on: Email me if my answer is selected or commented on Privacy: Your email address will only be used for sending these notifications.

pyqt close window event

Related Questions In Python. Can anyone help me out how to do it and what inputs to be given? How to open another window using PyQt Switch between self.The QCloseEvent class contains parameters that describe a close event.

Close events are sent to widgets that the user wants to close, usually by choosing "Close" from the window menu, or by clicking the X title bar button. They are also sent when you call QWidget::close to close a widget programmatically. Close events contain a flag that indicates whether the receiver wants the widget to be closed or not.

If it refuses to accept the close event nothing happens. Under X11 it is possible that the window manager will forcibly close the window; but at the time of writing we are not aware of any window manager that does this.

The event handler QWidget::closeEvent receives close events. The default implementation of this event handler accepts the close event. If you do not want your widget to be hidden, or want some special handing, you should reimplement the event handler and ignore the event. The closeEvent in the Application example shows a close event handler that asks whether to save a document before closing.

This is very useful for independent top-level windows in a multi-window application. QObject s emits the destroyed signal when they are deleted. If the last top-level window is closed, the QApplication::lastWindowClosed signal is emitted.

The isAccepted function returns true if the event's receiver has agreed to close the widget; call accept to agree to close the widget and call ignore if the receiver of this event does not want the widget to be closed. Documentation contributions included herein are the copyrights of their respective owners. Qt and respective logos are trademarks of The Qt Company Ltd. All other trademarks are property of their respective owners.

Contents Public Functions Detailed Description. See also accept.Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.

Please download a browser that supports JavaScript, or enable it if it's disabled i. Hence the close event is not called.

pyqt close window event

But have you looked at:. My background is more pure C stuff. Reading the posts, the problem is that signal is passed to the Python interpreter which is running your Python code, but that interpreter is not executing while you are in a Qt loop such as the standard sys. Hence all the shenanigan solutions, none of which work perfectly. When you run, say, Notepadyou don't have a terminal to press anything in anyway.

You just use the GUI to close the main window, or similar. I don't know about your "from integrated terminal I'm using visual studio code ". Furthermore, there is no reason your Python app should be launched from a terminal in the first place.

Since it's a GUI application, aren't you going to provide for it being launched from a desktop icon? Ugly but might work acceptably.

Qt Documentation

Do you mean like QCommandLineParser? Or Python's argparse module? If by any chance you mean can you pass arguments once the app is launched from the desktop via a shortcut, then yes. JonByes that's what i meant. Your closeEvent sounded right for this. SGaist said in PyQt5 closeEvent reimplementation :.In this part of the PyQt5 programming tutorial, we will explore events and signals occurring in applications. GUI applications are event-driven. Events are generated mainly by the user of an application.

But they can be generated by other means as well; e. The main loop fetches events and sends them to the objects. The event source is the object whose state changes. It generates events. The event object event encapsulates the state changes in the event source. The event target is the object that wants to be notified. Event source object delegates the task of handling an event to the event target. PyQt5 has a unique signal and slot mechanism to deal with events. Signals and slots are used for communication between objects.

A signal is emitted when a particular event occurs. A slot can be any Python callable. A slot is called when its connected signal is emitted.

In our example, we display a QtGui. We change the lcd number by dragging the slider knob. Here we connect a valueChanged signal of the slider to the display slot of the lcd number. The sender is an object that sends a signal. The receiver is the object that receives the signal.

Events and signals in PyQt5

The slot is the method that reacts to the signal. Event object is a Python object that contains a number of attributes describing the event. Event object is specific to the generated event type. Mouse tracking is disabled by default, so the widget only receives mouse move events when at least one mouse button is pressed while the mouse is being moved. If mouse tracking is enabled, the widget receives mouse move events even if no buttons are pressed.

The e is the event object; it contains data about the event that was triggered; in our case, a mouse move event. With the x and y methods we determine the x and y coordinates of the mouse pointer. We build the string and set it to the label widget.

Sometimes it is convenient to know which widget is the sender of a signal. For this, PyQt5 has the sender method. We have two buttons in our example. In the buttonClicked method we determine which button we have clicked by calling the sender method.The QCloseEvent class contains parameters that describe a close event. Close events are sent to widgets that the user wants to close, usually by choosing "Close" from the window menu, or by clicking the X title bar button.

They are also sent when you call QWidget. Close events contain a flag that indicates whether the receiver wants the widget to be closed or not. When a widget accepts the close event, it is hidden and destroyed if it was created with the Qt. If it refuses to accept the close event nothing happens. Under X11 it is possible that the window manager will forcibly close the window; but at the time of writing we are not aware of any window manager that does this. The event handler QWidget.

The default implementation of this event handler accepts the close event. If you do not want your widget to be hidden, or want some special handing, you should reimplement the event handler and ignore the event.

The closeEvent in the Application example shows a close event handler that asks whether to save a document before closing. If you want the widget to be deleted when it is closed, create it with the Qt. This is very useful for independent top-level windows in a multi-window application. QObject s emits the destroyed signal when they are deleted.

Qt GUI using Qt Designer for Multiple Windows

If the last top-level window is closed, the QApplication. The isAccepted function returns true if the event's receiver has agreed to close the widget; call accept to agree to close the widget and call ignore if the receiver of this event does not want the widget to be closed. Method Documentation QCloseEvent.

See also accept.