Qt Window Close Event Python

Qt expert Mark Summerfield has written the definitive best-practice guide to PyQt 4 development. This event handler is called with the given event when Qt receives a window close request for a top-level widget from the window system. The idea in PyQt5 is the same but the definitions are a bit different. PySide2) was announced recently and got me interested in trying to use it to load up a UI file. The QCloseEvent class contains parameters that describe a close event. At the start of the program, it will be in the center of the screen. If that window have different menus and even tool bar, I would call it different application and implement it separately, then use passing of data between programs. In fact all examples that come with PythonQt also crash when I run them on Windows. I have been googling this for the past week, and I can't find how to close the main window in Qt creator without closing the program. (1 reply) I am trying to write a python based glue to orchestrate interaction between Access, Excel and Outlook. Understanding PyQt. I am coming from a C++ and QT orientation. So I can open the dialog only once. So my questions: 1. If it refuses to accept the close event nothing happens. At main window close event, close all threads. Qt for Python is the official set of Python bindings for Qt that enable the use of Qt APIs in Python applications. You can create any class which subclasses PySide2 widgets. Signals, Slots, and Event Handlers. The following are code examples for showing how to use PyQt5. We simply close our application. the core of non-GUI classes, including event loop and Qt's signal and slot mechanism [6]. Your application can either use wx. all the overhead of Qt. (1 reply) I am trying to write a python based glue to orchestrate interaction between Access, Excel and Outlook. Primeros pasos en PyQt 5 y Qt Designer: Programas gráficos con Python. close()` has no effect. We set the window size using the setGeometry(left,top,width,height) method. Spy++ (SPYXX. CloseEvent¶. PyQt4 window on qt; 2 thoughts on then export the file and load it from python. This tutorial is written in PyQt4, but there is a newer version, PyQt5, that you can use. You can vote up the examples you like or vote down the ones you don't like. By default, the event is accepted and the widget is closed. Positioning GUI elements. TkInter - Python Wiki - Standard builds of Python include an object-oriented interface to the Tcl/Tk widget set, called tkinter. So I added. If a window with the same name already exists, the function does nothing. The QMainWindow class provides a main application window. Because it is based on Python, it also has much to offer for experienced programmers and researchers. hi sathishkumar, Thanks for reading. For more information, see View two or more worksheets at the same time. Events can be key presses or mouse operations by the user. Why aren't more desktop apps written with Qt? [closed] and Windows from the Qt website. With Rapid GUI Programming with Python and Qt you'll learn how to build efficient GUI applications that run on all major operating systems, including Windows, Mac OS X, Linux, and many versions of Unix, using the same source code for all of them. We decided that instead of using C++, it would be interesting to try out PySide2 and harness Python to drive the application. write a web browser by python - Creating a WebKit-based browser with PyQt "Simple" Editor - newbie for newbies PyQt4. 6 kernel) if that makes any difference. exitfunc should convert their code to use atexit instead. Importing tkinter is same as importing any other module in the python code. closeEvent (event) ¶ Forward the close event to every tabs contained by the windows. In this post, we will cover the following dialogs: Color Dialog File Dialog Font Dialog Input Dialog Print & Print Preview Dialogs …. PyQt is a set of Python v2 and v3 bindings for The Qt Company's Qt application framework and runs on all platforms supported by Qt including Windows, OS X, Linux, iOS and Android. You click the button and some code is executed. python protocol Tkinterでwindow closeイベントを処理するにはどうすればいいですか? def closeEvent(self, event): # code to be executed. Primeros pasos en PyQt 5 y Qt Designer: Programas gráficos con Python. If you click on the X icon on the title bar the application receives a wx. All of these extensions are now available in the python-mode-extensions available on the Source Forge Download Page. Further examples:. Introduction to GUI Programming with Python and Qt. 10) rather than our test script code if an object's properties change. If a window is closed via the close() function from QML, the onClosing event is not invoked. The Qt for Python project is developed in the open, with all facilities you'd expect from any modern OSS project such as all code in a git repository and an open design process. In Qt4 we’ve done this by the overriding closeEvent method, like this:. If you're used to e. Podría usted. How do I ensure that clicking the "X" and choosing the "Exit" menu item will do the same thing? 2. This opens up the possibility of developing applications in Python which have a familiar look and feel. We decided that instead of using C++, it would be interesting to try out PySide2 and harness Python to drive the application. Qt expert Mark Summerfield has written the definitive best-practice guide to PyQt 4 development. Yes, Qt-Creator is a C++ IDE, with little support for other languages but since version 2. I have started learning PyQt5 and wanted to create a simple window to test my skills. There are a number of ways to package your application and its dependencies: Pynsist, my own project, makes a Windows installer which installs a version of Python that you specify, and then installs your application. They are also sent when you call close() to close a widget programmatically. ICEauthority file OpenCV Python Examples (Camera Capture) OpenCV Python Examples (Showing Image). I have dialog *. At its simplest it allows you to send mouse and keyboard actions to dialogs and controls on both Windows and Linux, while more complex text-based actions are supported on Windows only so far (Linux AT-SPI support is under development). The event object (event) encapsulates the state changes in the event source. A Borland Graphics Interface like Grahics library for python. Qtvcp uses the PyQt5 toolkit’s widgets for linuxcnc integration. I'm making a plugin which has two windows. In this tutorial, we're going to cover how to create a pop up window for messages like warnings to the user in PyQT. 5 and later for 64-bit Linux, macOS and 32-bit and 64-bit Windows. A slot can be any Python. I have started learning PyQt5 and wanted to create a simple window to test my skills. Events and event handlers. These helpers are unique to wxPython since Python can't do method overloading like C++. The System Tray Icon example shows how to add an icon with a menu and popup messages to a desktop environment's system tray. in no event shall the copyright ## owner or contributors be liable for any direct, indirect, incidental, ## special, exemplary, or consequential damages (including, but not ## limited to, procurement of substitute goods or services; loss of use, ## data, or profits; or business interruption) however caused and on any ## theory of liability. There are three options for configuration here, because PyQt4 has two APIs for QString and QVariant: v1, which is the default on Python 2, and the more natural v2, which is the only API supported by PySide. This is call event-driven programming (Because the program will do nothing but wait for events, and only react when it receives an event. Creates a new gtk. You can get both of these by running: Capture window close event, ignore, and hide window (exit to system tray). You should not have to re-implement those events just for a close. emit() When we click on the window with a mouse pointer, the closeApp signal is emitted. The QtGui module contains the majority of the GUI classes. 能書き OpenCVでイメージを表示した際に、面倒な落とし穴がある。クローズボタンを押してしまうと処理がハングアップする. Python 2 EOL: How to survive the end of Python 2 Python 2 support ends in 2020. VTK/Examples/Cxx. There may be all sorts of reasons why you may want to warn the user regarding an action they are trying to make. When a window is resized in Qt, an event occurs. Example of how to use PyQt to popup a dialog at current mouse pos, and close in response to ESC keyc - pyqt_popup_close. 5 and up will now work around this by pulling the toolbars out and back into the regular toolbar and vice versa when you swap out. idle() to read events from input providers, pass events to postproc, and dispatch final events. We simply close our application. There are some differences, and kenwaldek has ported this series code, by individual tutorial code, to PyQt5. By default docking windows on the bottom or top will span the whole window. wxPython is a GUI toolkit for the Python programming language. How can I open dialogs more than once? Thank you. Chapter 2 – Pygame Basics Just like how Python comes with several modules like random , math , or time that provide additional functions for your programs, the Pygame framework includes several modules with functions for drawing graphics, playing sounds, handling mouse input, and other things. PyQt4 精彩实例分析之电子钟,当然在写实例之前要先安装PyQt4模块。from PyQt4. close() but when I open it again Python crashes. Learn Python GUI programming using Qt framework. Finally show() is called to display the window. Authors who use sys. Here we are going to study about few other important events, signals, and slots through elaborative examples and practical codes. close() but when I open it again Python crashes. # In this case we give it the values from the settings file. 12+ framework. If this works you know you have Qt set up correctly & you can start creating your applications! The following examples are written for Python 3 with PyQt5, but can be easily adapted for other versions. Therefore, our Python process never sees the signal until we hit the exit button of our Qt application window. write a web browser by python - Creating a WebKit-based browser with PyQt "Simple" Editor - newbie for newbies PyQt4. We are now working on Qt based GUI applications for various experiments. 5 and up will now work around this by pulling the toolbars out and back into the regular toolbar and vice versa when you swap out. Close your windows when you're done with them even though exiting the program will also close them. The method for installing these will depend on the platform you are using. Download Windows help file; Download Windows x86-64 embeddable zip file; Download Windows x86-64 executable installer; Download Windows x86-64 web-based installer. Updated on 27 October 2019 at 17:32 UTC. emit() When we click on the window with a mouse pointer, the closeApp signal is emitted. close_resources()¶ Called before stopping the service process. The event target is the object that wants to be notified. If using Close(), you can pass a True argument to this function to tell the event handler that we definitely want to delete the frame and it cannot be vetoed. Access them from any PC, Mac or phone. There may be all sorts of reasons why you may want to warn the user regarding an action they are trying to make. 3 is only tested with PySide since binary installers for PyQt are not provided for Python 3. I can understand it but I'm curious to know why you need it? Anyway, if you want to try the custom Qt window, just launch the operator. Rohit Sahu 4,198,272 views. Example of how to use PyQt to popup a dialog at current mouse pos, and close in response to ESC keyc - pyqt_popup_close. Through a series of examples and labs, we will cover GUI programming, GraphicsView, Model/View and the challenges inherent to mixing the Qt API with Python. Python Bindings for Qt¶ Since we are developing the plugin in Python, we need to install the python bindings for Qt. Matlab, Pyzo can be considered a free alternative. It does the same (except writing in the Python console) as the function "run_script()" of teh example above: it creates a window and display the message "Hello world". QMainWindow has its own layout to which you can add QToolBars, QDockWidgets, a QMenuBar, and a QStatusBar. O programa deve exibir a janela A ao executar, quando o usuário pressionar a tecla enter, o programa deve abrir uma segunda, janela B, por alguns segundos e voltar para a primeira janela. Complex filterchains per camera should be encapsulated in classes, like we did in the tutorial. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. ignore() anywhere in the Qt library (to my. This project is based on the pyqode. I want to try it into my app and I don't know how to bind my QLineEdit focus/click event (MainWindow and widgets and stuff were created with QtDesigner) to trigger out your keyboard focusing my QLineEdit, if you could explain how to do it/how it works that would be awesome cause I really want to learn about. In my previous article, I shared how to use PyQt and Dynamsoft Barcode Reader to create a simple Windows-styled GUI app to read barcodes from image files. The window title is set using setWindowTitle(title). PyQt4 window on qt; 2 thoughts on then export the file and load it from python. 7 and OpenCV 2. GitHub Gist: instantly share code, notes, and snippets. wxPython: It is open-source, cross-platform GUI toolkit written in C++. ignore() anywhere in the Qt library (to my. WINDOW_TOPLEVEL (see the GTK Window Type Constants for more details). Como sólo vamos a tantear el terreno vamos a indicarle crear una "Main Window" o ventana principal que normalmente. Alternative GUI development libraries exist for Python including those based on VW_windows, Qt and the Tk tool kit. 2 Launching Slicer; 2. close() but when I open it again Python crashes. No files for this release. Learn Python GUI programming using Qt framework. Widgets like a text field, an edit field or a combo box can be choosen from the vertical menubar on the left side and dragged into the application window. Matlab, Pyzo can be considered a free alternative. In the same manner as above, is there any way of doing the same job for minimize event. Nah setelah kita bermain - main dengan cara membuat window sederhana pada Python yang menggunakan library PySide, maka sekarang saya akan mengajak kalian menambah kan window yang sudah kita buat tadi dengan fitur. A Python program started from Visual Studio runs in its own console window. close()` has no effect. There are a number of ways to package your application and its dependencies: Pynsist, my own project, makes a Windows installer which installs a version of Python that you specify, and then installs your application. And it knows the Python interpreter where to run it. By default, the event is accepted and the widget is closed. You can get both of these by running: Capture window close event, ignore, and hide window (exit to system tray). this button: If there isn't a slot for this, can anyone suggest me some other method by which I can start a function after the user presses that close button. Visit our Github page to see or participate in PTVS development. Learn how to develop GUI applications using Python Tkinter package, In this tutorial, you'll learn how to create graphical interfaces by writing Python GUI examples, you'll learn how to create a label, button, entry class, combobox, check button, radio button, scrolled text, messagebox, spinbox, file dialog and more. ui Design Form with The PushButton. For this tutorial I am assuming my reader knows the basics of both Python and Qt Designer. Click the action on the Action Editor, and select "Go to Slot". Qt requires we do this because it won't open a new window unless we override the createWindow() method. [email protected] Python and PyGTK Installation: Python and PyGTK are typically native packages on Linux and are easily installed on MS/Windows as MSI installations. A main window provides a framework for building an application's user interface. In order to run this example, you'll need Python 2. I have been trying to link a function to the Main Window's close button (the red x in the corner of the window) but I haven't been having any success. I can understand it but I'm curious to know why you need it? Anyway, if you want to try the custom Qt window, just launch the operator. Peter wrote: I want to draw some lines on a widget. Complex filterchains per camera should be encapsulated in classes, like we did in the tutorial. Books such as How to Think Like a Computer Scientist, Python Programming: An Introduction to Computer Science, and Practical Programming. An example code to make rounded window on Qt. In this post I will describe the process of of reading, performing any arbitrary image processing algorithm and displaying an image read from a video file, camera or RTSP feed using OpenCV , and the same time keeping the user interface (created using Qt) responsive. Mit der Bibliothek lassen sich Oberflächen für Python-Programme erstellen, die die GUI-Spezifika unterschiedlicher. First of all you'll need to download the latest version of IronPython, you will also need Python 2. pyexten-sion, but for Python GUI applications we use a. Let’s go ahead and get this example started. The default implementation of QWidget. At main window close event, close all threads. How do you gather this? If this snippet is representative of your code, then you need to accept the event at the end of the closeEvent override. Building windows forms using ironpython is very easy. PyQt is a set of Python v2 and v3 bindings for The Qt Company's Qt application framework and runs on all platforms supported by Qt including Windows, OS X, Linux, iOS and Android. We demonstrate these two priorities with a script that can record user specified objects in a list window. Event source object delegates the task of handling an event to the event target. A slot can be any Python. QtGui import * from PyQt4. 3 Informatics; 2 Community-contributed examples. Qt expert Mark Summerfield has written the definitive best-practice guide to PyQt 4 development. How do I set document window to fullscreen by Python? OS: Debian GNU/Linux 7. We simply close our application. Mit der Bibliothek lassen sich Oberflächen für Python-Programme erstellen, die die GUI-Spezifika unterschiedlicher. Open up a new file, name it click_and_crop. In fact all examples that come with PythonQt also crash when I run them on Windows. Using Window Close Event 05:19 If you are looking to learn Python GUI programming and specifically QT and PYQT5 then this is the course for you. VPython makes it easy to create navigable 3D displays and animations, even for those with limited programming experience. Important: When you run this command, DISM uses Windows Update to provide the files that are required to fix corruptions. I have a system shutdown pushbutton that calls the function, but I need for the main window close X to react in the same fashion. argv) # Add a basic widget to this application: # The first argument is the text we want this QWidget to show, the second # one is the parent widget. We set the window size using the setGeometry(left,top,width,height) method. Language bindings are available for a number of languages including Python, Perl, Ruby, etc. 5; this means a variety of licenses including GNU General Public License (GPL) and commercial license, but not the GNU Lesser General Public License (LGPL). Widgets like a text field, an edit field or a combo box can be choosen from the vertical menubar on the left side and dragged into the application window. To resize widgets with the window, use a layout. close() method closes the It is called initially to populate the hexview and bound to scroll up / down and window resize. programming. Yes, Qt-Creator is a C++ IDE, with little support for other languages but since version 2. [PyQt] Second screen closes immediately I'm currently trying to learn python GUI with PyQt and I'm trying to open a second screen but it just closes immediately, any idea why? (And on that note, how can I improve my code?). (4 replies) Hi,,, Is possible disable the close button in KDE management window? Using python+qt? thanks Grokbase › Groups › Python › python-list › August 2006. Capturing mouse click events with Python and OpenCV. If you do that then the Python script will be terminated without running any cleanup code. By the end of the course students have an understanding of the Qt library and tools and be able to create simple but useful GUIs in Python. Como sólo vamos a tantear el terreno vamos a indicarle crear una "Main Window" o ventana principal que normalmente. Let's go ahead and get this example started. Built on top of the highly portable SDL (Simple DirectMedia Layer) development library, pygame can run across many platforms and operating. New Front Panel Design Size:62mmx78mmx13mm. What's the right way to open and close dialog windows multiple times? At the moment I instantiate a dialog window on a clicked button signal, then close it with self. Qtvcp uses the PyQt5 toolkit's widgets for linuxcnc integration. In this tutorial, we shall learn how to create a multimedia app in Python with the help of LibVLC and GTK+ which plays media when its starts. Rohit Sahu 4,198,272 views. A button is also created to close the window. It allows us to trigger an event. close_tab (current_tab) ¶ Called when you need to try to close a tab. The problem is/was that the root window did not close itself, when just using `askopenfilename()`. Python packages also can't depend on something like Qt. 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. PyQt fills this hole in the meantime, but might be problematic license-wise (GPLv3 or paid commercial). While you can use CMake to target Qt (if you do, you should read more about the Visual Studio support for CMake), Qt also provides its own Qt-optimized build system called qmake. This event class contains information about window and session close events. If you have a programming background, you may hear about event handling where you interact with a widget and a function is executed. So our event loop never churns the Python interpreter and so our signal delivered to the Python process is never processed. These helpers are unique to wxPython since Python can't do method overloading like C++. Qt expert Mark Summerfield has written the definitive best-practice guide to PyQt 4 development. This is actually very similar to the way. We simply close our application. This tutorial is written in PyQt4, but there is a newer version, PyQt5, that you can use. X-windows, i. How do I set document window to fullscreen by Python? OS: Debian GNU/Linux 7. Hence, Qt Designer does not have the facility to debug and build the. A PyQt window can be configured using Some windows don't have a close window. We will not share/pass on your information to any third parties. Event source object delegates the task of handling an event to the event target. - How to open a new window from a pushbutton in Qt - How to use HTML QT Widgets - How to connect Qt to SQLite - Login Form using sqlite in QT application - how to use QLineEdit as password field - How to set image with QLabel in Qt - How to open a new window after successful Login - Creating connection open and close function with sqlite. Yes, Qt-Creator is a C++ IDE, with little support for other languages but since version 2. In this article we take a look at how a Tkinter program differs from a standard Python program and how to organize things around a GUI. I understand events reasonably well, can DispatchWithEvents an instance of excel and catch worksheet and file save related events. Python GTK+ 3 Tutorial. You can reimplement this function to change the way the widget responds to window close requests. WINDOW_POPUP is used to create a pop-up menu or pop-up tooltip. What I want to know is how to refer pushButton in one window to method which opens new window. On Linux, you can install Tkinter using your distribution package manager. Step 1 : Arrange your windows so that Spy++ and the subject window are visible. What's the right way to open and close dialog windows multiple times? At the moment I instantiate a dialog window on a clicked button signal, then close it with self. We simply close our application. Button Function and Custom Event- PyQt: In this article, we are going to study about few of button functions and, we'll design some custom events. create_tab_with_current_kernel ¶. There may be all sorts of reasons why you may want to warn the user regarding an action they are trying to make. Although no events have been defined explicitly there are some event handlers provided by wxPython. Understanding PyQt. by Christoph Gohlke, Laboratory for Fluorescence Dynamics, University of California, Irvine. Today's piece is going to be an introduction to using Qt Designer tool to build interfaces for Python applications utilizing PySide bindings Qt. When automating multiple applications or a single application with multiple windows it can be useful (or required) to bring one window to the foreground, or to make the non active application active. createInstance("apso. An Introduction to PyQt: creating GUIs with Python's QT bindings - first published the December 2007 issue of Python Magazine. close() method closes the It is called initially to populate the hexview and bound to scroll up / down and window resize. All of these extensions are now available in the python-mode-extensions available on the Source Forge Download Page. The event source is the object whose state changes. While you can use CMake to target Qt (if you do, you should read more about the Visual Studio support for CMake), Qt also provides its own Qt-optimized build system called qmake. A signal is emitted when a particular event occurs. Qt framework is an ever growing cross-platform C++ framework, ideal for building desktop, mobile, and even embedded solutions. The python standard library is included, either built in the plugin or bundled in include/Lib (which is in sys. When an event occurs, Qt creates an event object to represent it and delivers it to a particular instance of QObject (or a subclass) by calling its {{event. PyQt4 also has a couple of utility programs that are useful: pyuic4 corresponds to the Qt uic utility that converts GUIs created using Qt Designer to Python code. this button: If there isn't a slot for this, can anyone suggest me some other method by which I can start a function after the user presses that close button. accept() # let the window close else: event. 5, if you called PySide. Centre() so that the window pops up in the center of. Introduction to GUI Programming with Python and Qt. tool,Qt Designer. Notice that at the bottom, in the Action Editor, a new action called actionNew_Window has been created. In this article, you will see how Qt is installed on a Raspberry PI3 and learn how to develop a 2D charts library. Hands-On Qt for Python Developers. PyQt is a set of Python bindings for Qt framework Bindings implemented as Python modules (620+ classes) Almost the entire Qt library is available Take advantage of both languages key strength Python: easy to learn, lot of extensions, no compilation required Qt: abstraction of platform-specific details, GUI designer. An example is shown below. Capturing mouse click events with Python and OpenCV. In my previous article, I shared how to use PyQt and Dynamsoft Barcode Reader to create a simple Windows-styled GUI app to read barcodes from image files. Python and PyGTK Installation: Python and PyGTK are typically native packages on Linux and are easily installed on MS/Windows as MSI installations. This tutorial is written in PyQt4, but there is a newer version, PyQt5, that you can use. To close the Administrator: Command prompt window, type Exit, and then press Enter. The library provides an API in Python to develop applications that can be executed in Windows GUI mode, Web mode, or in Terminal mode. Most of your Python programs will have this QPushButton widget. The event loop waits for an. The QMainWindow class provides a main application window. Hands-On Qt for Python Developers. fr Qt - Facts Qt is cute Cross platform application framework for GUI X Window System, Windows C++ kernel + many bindings. What's the difference between the Close, Exit, and Destroy methods? Which should I use when closing my application? Thanks. Download the OSGeo4W network installer and choose Express Desktop Install. Close event just as the framework does, or it can call wx. I hate when my application window pops up somewhere in the corner by the will of the allmighty window manager. pyexten-sion, but for Python GUI applications we use a. As you may know PyQt is a set of Python bindings for Qt framework, and Qt (pronounced cute) is C++ framework used to create GUI-s. 7 and OpenCV 2. For building plugins we need the pyrcc4 command-line tool. In this part of the PyQt4 tutorial, we have covered signals and slots. This is just the basic; so maybe you don’t catch it cool but we will design cooler custom events in future articles. Here, the term protocol refers to the interaction between the application and the window manager. New Front Panel Design Size:62mmx78mmx13mm. It allows us to trigger an event. PyQt4 has a unique signal and slot mechanism to deal with events. Starting Points. This works ok, but when I want to redraw, the old lines are still there. First of all I want to say this keyboard works really well, awesome. restoreGeometry(geometry) def closeEvent (self, event): # Now we define the closeEvent # This is called whenever a window is closed. PyQt is a set of Python v2 and v3 bindings for The Qt Company's Qt application framework and runs on all platforms supported by Qt including Windows, OS X, Linux, iOS and Android. If the owner of a window is closed (see Owner), Closing is not raised on the owned. Today's piece is going to be an introduction to using Qt Designer tool to build interfaces for Python applications utilizing PySide bindings Qt. Below are a few short examples to creating PyQt apps and getting a window on the screen. Destroy directly. Let’s go ahead and get this example started. Is there not way to hide instead of close the window in QT? Then you could create window hidden and then only show it when needed and afterwards hide it again. close() method closes the It is called initially to populate the hexview and bound to scroll up / down and window resize. Pyzo is a Python IDE that works with any Python interpreter installed on your system, including Conda environments. Catchy close event in Qt Quick. the lists at the top of the windows, which appear (or pull down), if you click on an item like, for example "File", "Edit" or "Help". This class is a 5-day hands-on introduction to developing desktop applications using the official set of Python bindings: Qt for Python (also known as PySide 2). Which command I need to use? I use withdraw and it disappear, but it only hide, not real close. 2 detected!" Seems to be related to compatibility of Qt with Windows 8. dispatch_input [source] ¶ Called by EventLoopBase. This tutorial is aimed at beginners just starting out with PyQt/PySide and Qt Designer, it will cover very basic usage of PyQt in combination with Qt Designer.