Orange widgets are building blocks of data analysis workflows that are assembled in Orange’s visual programming environment. Imagine changing buttons to QComboBox or any other UI change. QObject. More than 100 million people use GitHub to discover, fork, and contribute to. 按钮被点击触发信号激活 QSignalMapper的槽函数map ()，map ()会统一释放一个带有标记的信号，该信号触发定义的按钮槽函数，根据标记（ID、 QWidget 、QString）去判断到底. This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the signal. Already with Qt4, you can use QSignalMapper to achieve much the same effect, with a few more objects. Then I discovered QSignalMapper which let me tie a QString to a given action. We strongly advise against using it in. This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the signal. There are three points to keep in mind to use QSignalMapper: Use the setMapping method to add a mapping between a sender QObject instance, and a value (integer, string, etc. 0. 应用场景一般是：你有一些信号，这些信号对应的槽函数内容都差不多，最. The Camera Example demonstrates how you can use Qt Multimedia to implement some basic Camera functionality to take still images and record video clips with audio. com if any conditions of this licensing are ** not clear to you. 2 Answers Sorted by: 2 1) QSignalMapper maps a QObject* sender to a (int, string, QWidget* or QObject*). cpp file. The solution is to connect the clicked signal of the different buttons to the mapper directly (rather than through your LoadGameMenu. The specified plugin paths can be retrieved using the pluginPaths () function. It can be subclassed to tailor the look and feel. This is an overloaded function. I have a question about QSignalMapper. With QSignalMapper, trivial change in a . It behaves essentially like the above function. See also setMapping(). I have had a look to the logfile of our application, started/cleared yesterday morning. snap1. QSignalMapper is a class in the Qt framework for C++ programming language. map () being called from a proxy rather than new-style connections. The class supports the mapping of particular strings or integers with particular objects using setMapping(). This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the signal. The QSignalMapper class bundles signals from identifiable senders. Detailed Description#. QSignalMapper does not provide functionality to pass signal parameters. These can be created by constructing a widget with the required visual properties - a QFrame, for example - and adding child widgets to it, usually managed by a layout. According to the QT documentation QWorkspace should be replaced with QMdiArea. . map) Tonight's PyQt snapshot will be smarter about finding a usable Qt slot before deciding that it needs to. 0. Instead of connecting and disconnecting the slot one simple solution is to block the emission of the signal using the blockSignals () method. The cards are clickable, and lead to the same effect, so the use of QSignalMapper was obvious. Sorted by: 3. I'd appreciate help as to why the VerticalLineSegment slot updateX is not triggered. The problem is when I modify the image inside the Qlabel the update of image works bad. [signal] void QSignalMapper:: mappedWidget (QWidget *widget) This signal is emitted when map() is signalled from an object that has a widget mapping set. if i get this message again, i will let you know. 2. This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the signal. _mapper =. 2. 2 [Русский] Qt Core ; QSignalMapper Class 8. The above diagram shows such a composite widget that. We would like to show you a description here but the site won’t allow us. e. Consider a card game. This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the signal. This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the signal. 详细说明 QSignalMapper类捆绑来自可识别发送者的信号。此类收集一组无参数的信号，并使用与发送信号的对象相对应的整数，字符串或窗口小部件参数重新发出它们。该类使用setMapping（）支持特定字符串或整数与特定对象的映射。然后可以将对象的信号连接到map（）插槽，该插槽将发出与原始信令. QSignalMapper extracted from open source projects. I have simple application, a calculator. This is useful when multiple objects need to send a signal to the same slot, but with different parameters. Try this instead: ( 2 ) 使用QSignalMapper类. This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the signal. Press Ctrl+a / Ctrl+b to switch between tabs. 2 Qt QSignalMapper doesn't work. QSignalMapper 主要使用的场景是多个 widget 触发同一个 slot，每个 widget 都对应一个数据(mapper->setMapping() 中设置)，在 slot 中只关心数据，并不关心 widget 是谁，例如计算器。 . Use mapped (QWidget*) and change your slot to have the same signature: button_pushed (QWidget*). The QSignalMapper class bundles signals from identifiable senders. . self. The Input Panel example shows how to create an input panel that can be used to input text into widgets using only the pointer and no keyboard. Learn more about TeamsQSignalMapper:: QSignalMapper (QObject *parent = nullptr) Constructs a QSignalMapper with parent parent. The QSignalMapper class is provided for situations where many signals are connected to the same slot and the slot needs to handle each signal differently. This function was introduced in Qt 5. ** ** Contact info@trolltech. When you need many widgets that work as a group you can create composite widget, encapsulate mapping in it and provide public interface (signals) as something more managable. 15] void QSignalMapper. In your Messenger class, you would add a QSignalMapper mapper object, and your function would look like:. The mentioned message was logged only one time. 详细说明 QSignalMapper 类捆绑来自可识别发送者的信号。. The central feature in this model is a very powerful mechanism for seamless object communication called signals and slots. QSignalMapper class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the. #. 15. Qt provides four classes for handling image data: QImage, QPixmap, QBitmap and QPicture. For strings and integers, you can use QSignalMapper. I think in this case QSignalMapper is the way to go. I want to use a QObject as a carrier by setting the various information I want to transmit as attributes of the QObject. However, the look of a QLabel can be adjusted and fine-tuned in several ways. You can limit the size of the read buffer using setReadBufferSize () . h" #endif // QT_H #ifndef QT_NO_SIGNALMAPPER class QSignalMapperData; struct QSignalMapperRec; class Q_EXPORT QSignalMapper : public QObject {. One of the cool things introduced in Qt5 is a new overload for the QObject::connect () method: C++. Simply use a QMap<QObject*,ValueStruct>, where ValueStruct keeps your arguments. QSignalMapper; QSize; QSizeF; QSocketDescriptor; QSocketNotifier; QSortFilterProxyModel; QStandardPaths; QStorageInfo; QStringConverter;. A command button is rectangular and typically displays a text label. How can I do that?, in the code I present it receives the. QSignalMapper didn't help, because all the properties are in the same object. 1 Answer. protected slots: void add_client();. If nothing is passed, the new signal will have the same name as the variable that it is being assigned to. Note that QSignalMapper is a very old class that was required when it wasn't possible to use lambdas in Qt slots. Update. – Qt Base (Core, Gui, Widgets, Network,. Is there a way to clear QSignalMapper, or is QSignalMapper automatically cleared when an object is removed from UI? Now inside of readCombo i want to read a string and pass it to change picture: QString imageFileName = xmlreader->attributes (). mousePressEvent = lambda event : edit. Jacobs on this Question, and was trying to create an app that will open multiple windows with different parameters, but it doesn't work, looks, like app is opening w. and I assume you initialized the "signalMapper = new QSignalMapper (this)" in the MyApp constructor. If you need to know both value and sender you either can use some internal class mapping, or use QObject * mapper and then cast QObject * to slider. Qt Library. MainWindow::MainWindow (QWidget *parent) : QMainWindow (parent) , ui (new. 1. But the compiler complains about no matching parameters. J 1 Reply Last reply 10 May 2018, 05:28 0. Note that in most cases you can use lambdas for passing custom parameters to slots. Detailed Description. Related questions. Cards are drawn from a deck and displayed on screen. After deeper review of the code flow I suspect that you wanted to connect mapper to registerProcess() slot instead of pidOut(). partial, lambdas, or custom signals. There is no such signal mapped (const QPushButton&). QSignalMapper is the best solution to connect multiple signals to the same slot. PySide6. Detailed Description. QSignalMapper类的功能核心是要建立一个从原始信号的object到需要的数据的映射（setMapper函数）。. plist file in the application’s bundle (See Qt for macOS - Deployment ). g. You should use direct connection of console and this on readReady (of course with slot of this with void argument as readReady() ). I shortened the code to be more precise but this has hidden the actual cause. ) Since the signatures are compatible, the compiler can help us detect type mismatches. PreferencesRole. This signal is emitted when map() is signalled from an object that has a widget mapping set. Qt adds these features to C++: a very powerful mechanism for seamless object communication called signals and slots. I suggest that you try copy/paste the following line to replace yours:I know that i can use QSignalMapper to call a slot with different parameters based on connection. If it is the case, QSignalMapper cannot help you here. QtCore. ote This does not disconnect any signals. To make. Main Page; Packages; Classes; Class List; Class Index; Class Hierarchy; Class MembersThe PySide. – jonspaceharper But this removes all knowledge of the original sender widget. The QWidget class provides the basic capability to render to the screen, and to handle user input events. It also lets you associate ints, QWidgets, and QObjects to a QAction. QSignalMapper is the best solution to connect multiple signals to the same slot. We strongly advise against using it in new code. The QSignalMapper class bundles signals from identifiable senders. It's actually a problem with QSignalMapper. The class supports the mapping of particular strings or integers with particular objects using setMapping(). QSignalMapper does not provide functionality to pass signal parameters. The simplest way to set multiple events to a simple behaviour is to do it in pure python: for edit in LineEdits: edit. PyQt provides access to all the available. QSignalMapper * mapper = new QSignalMapper (this);. While it still exists, it's rarely used, and is mostly considered obsolete. 3 Qt: the signal handler is not called when the signal is emitted. ) is supported. Also, make sure to register your struct to the Qt metatype system by using Q_DECLARE_METATYPE. Provide details and share your research!I'm trying to connect a button click to a function, and pass an int value, but keep getting an error: no matching function for call to Main::connect. 1 Answer. If you need to know both value and sender you either can use some internal class mapping, or use QObject * mapper and then cast QObject * to slider. Mac OS X also has a "Find" clipboard. See this question for three ways of mapping one of a multitude of objects to a value. This is an overloaded function. ** Contact: ** ** This file is part of the QtCore module of the. The workaround is to explicitly specify a signal that is compatible with map (). Push (click) a button to command the computer to perform some action, or to answer a question. The QSignalMapper class bundles signals from identifiable senders. With QSignalMapper, trivial change in a . J. # Example showing how QSignalMapper can be used to manage an arbitrary # numbers of parameterless signals and re-emit them with an argument # identifying the sender. The QSignalMapper is used to re-emit signals with optional parameters. removeItem, QtCore. Before Qt 5. Here you can get list of all widgets available in. Instead of using QSignalMapper, which forces you to create a custom STRUCT_WRAPPER, try using the QAction::setData method, which accepts any QVariant. you really can't connect to a private slot of a QObject; You are creating a new signal mapper every time you call readCombo which you aren't clearing - resulting memleaks. For more information about how to use Maintenance Tool with the command line interface, see Get and Install Qt with. A combobox is a selection widget that displays the current item, and can pop up a list of selectable items. Share. Expecially it is difficult because we have no idea what this is. I currently have a qml object keyboard. . The QSignalMapper class bundles signals from identifiable senders. Normally it should not but anyway, nice you found out. Here are the examples of the python api PyQt5. trigger () behaves correctly, and not act_str. com if any conditions of this licensing are ** not clear to you. That is the purpose of using QSignalMapper. 该类使用setMapping（）支持特定字符串或整数与特定对象的映射。. Feb 13, 2019 at 13:37. Just right-click any dock title-bar, or any tool-bar or menu-bar. I'm having some troubles trying to pass a custom widget to a custom slot inside my Qt App. Instead of accepting an int as an argument, use sender() to determine which button is the source. While trying to connect the buttons' clicked () signals to the textEdit to display the relevant state, I got stuck on an error: Object::connect No such slot QTextEdit::append ("move state") Object. 2. But I am not able to exactly place, which signal is to be called for which slot. 3. Who invokes UpdateTempValues? the mapped signal from QSignalMapper, and then who is the sender? it is the object that emits the signal that invokes the slot, in this case QSignalMapper, QSignalMapper can be converted to QSlider? No, does the above explain the problem? – eyllanesc. This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the signal. @. You can check the return bool and have a look to the output window of your application. Qt provides this, by combining the speed of C++ with the flexibility of the Qt Object Model. It behaves essentially like the above function. But i know it is possible to do it with strings. Is there any relatively simple way for it? c++; qt; enums;Here is an easy way to get the 3D representation of an object. QAction. The class supports the mapping of particular strings or integers with particular objects using setMapping(). Toggle table of contents sidebar. Update 2: It worked after the correction suggested in the solution below for QSignalMapper. QtCore. However, beside that id it is not possible to extract console pointer,. But I have problem, I don't know how to assign string to a button. I need to implement a simple message bus: One process only thus no need do D-Bus. . to get the ID (can be 1 to 16) and know which ID did kick off the singleShot. The class supports the mapping of particular strings or integers with particular objects using setMapping(). QSignalMapper can not be used for that, but the class is quite simple to re-implement and specialize for your needs. This class collects a set of parameterless signals, and re-emits them with integer or string parameters corresponding to the object that sent the signal. Share. mapper = new QSignalMapper ( this ); connect ( mapper, SIGNAL (mapped (QWidget*)), workspace, SLOT (setActiveWindow. This is our current code -. QtCore. Hope you found it useful. Looks like all good. SoInput() inp. A quick look at the Qt docs for QSignalMapper (assuming that is what you're using based on the question title) states that the parameter for the mapped signal is const QString&. It is provided to keep old source code working. If you want to have the signal clicked (int, int) in a button, you can subclass. clicked. ; calling connect multiple times creates multiple connections i. SIGNAL ("clicked (int)")) Having self. A typical workflow may mix widgets for data input and filtering, visualization, and predictive data mining. py. The quick-and-dirty way is to use connect () as usual, and then in your slot method, call sender () to find out which object sent the signal. QAbstractButton provides most of the states used for buttons: isDown () indicates whether the button is pressed down. Returns true if convert can convert from fromType to toType. . addObject("Part::Box", "myBox") s = box. Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyTextEdit Example#. Это лучшие примеры Python кода для PyQt5. @t-vanbesien said in no matching member function for call to 'connect':. Use mapped (QWidget*) and change your slot to have the same signature: button_pushed (QWidget*). queryable and designable object properties. When a widget is used as a container to group a number of child widgets, it is known as a composite widget. activeDocument(). qml I have the following signals:. See also Input/Output and Networking . Obviously it´s caused by Esri: QObject::connect: No such signal QRTImpl::TaskHelper::taskCompleted (QUuid,. hIf your pointer is an actual pointer to a QPolygonF that cannot be copied (because it's the pointer to the actual item being held in the QGraphicsScene and you therefore need the original pointer to remove it), I think you should just be able to pass that pointer as-is, assuming mapToScene() is returning a reference to it rather than a copy:. The setMapping function assigns a unique integer value (1 and 2) to each button. 通过看帮助文档中的内容，其主要的作用是将一个无参信号绑定一个参数，然后再将这个信号加上这个参数转发出去。. @hskoglund said in Dynamically add buttons to ScrollArea: QHBoxLayout *hlayout = new QHBoxLayout; Edited: That stopped the crashing and the order of code was off, and after rearranging to the following, everything works as originally intended. Combo Widget Mapper Example. There's aleady a built-in dock-widget menu. [virtual] QSignalMapper:: ~QSignalMapper Destroys the QSignalMapper. Ask Question Asked 8 years, 2 months ago. When this loop is done, processEvents will be called again and in that the doSomething () will be executed. Calling QComboBox* combo = (QComboBox* )sender() in the slot fails, presumably because sender() is now the QSignalMapper. To start viewing messages, select the forum that you want to visit from the selection below. Sep 9, 2013 at 15:14. QTimer::singleShot - forward parameter to SLOT called. PyQt: Changing cursor when hovering a button. 14. I am trying to set up a signal-slot arrangement in PyQt where the signal transmits a lot of information. You can rate examples to help us improve the quality of examples. More. For any interested, I worked around the problem using a closure, which seems a bit cleaner from a coding point of view, although I don't have any idea if it is more efficient or not:I'm trying to use QSignalMapper with my buttons, but I can't seem to get it to work to trigger my slot. Here's a dummy widget to illustrate that. – jonspaceharperBut this removes all knowledge of the original sender widget. Modified 8 years, 2 months ago. Instead of accepting an int as an argument, use sender() to determine which button is the source. See also setMapping(). 1. By default, labels display left-aligned, vertically-centered text and images, where any tabs in the text to be displayed are automatically expanded. Since a slot has to have the same signature than the connected signal, on_steps_returnPressed becomes on_steps_returnPressed(QWidget*) (cast the parameter to a QLineEdit): The QSignalMapper class bundles signals from identifiable senders. I want to implement a custom response to user input for several similar QLineEdit objects. Here is my code for the SignalMapper: In my header:. This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the signal. 467. In theory, this should work - there is a QSignalMapper. The use of QSignalMapper is not necessary in Qt 5, and is optional in Qt 4. The code below returns no error, but just the act_int. Similarly, the contents of a UI file can be retrieved using the. Sorted by: 1. /***** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). I did it like this:The push button, or command button, is perhaps the most commonly used widget in any graphical user interface. currentIndexChanged Many people suggest it can be made with lambda. The signals and slots mechanism is a central feature of Qt and probably the part that differs most from the features provided by other frameworks. The QSignalMapper class bundles signals from identifiable senders. – SPlatten. see documentation: This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the signal. You can trigger behaviors in response to user input, such as button presses or text input, or events in your own code. How in PyQt connect button to a function with a specific parameter? 11. When creating a QSettings object, you must pass the name of your company or organization as well as the name of your application. map ()作为. Since your "load" and "return to main menu" signals are being sent from the same sender object they will be mapped the same way. You could do it with QShortcut fairly easily in code though. There are three points to keep in mind to use QSignalMapper:. 使用QSignalMapper确定信号的发送者（针对多个发送者的情况） 如果有多个对象都可能发送信号，并且我们希望根据信号发送者来采取不同的操作，可以使用QSignalMapper类。该类可以将多个对象与相应的信号关联起来，并通过sender()方法确定信号的发送者。Many examples show how to do this with QSignalMapper, but it is not applicable when the signal carries a parameter, as with combobox. [virtual] QSignalMapper:: ~QSignalMapper Destroys the QSignalMapper. These are the top rated real world Python examples of PyQt5. currentIndexChanged. The class supports the mapping of particular strings or integers with particular objects using setMapping(). 使用QSignalMapper确定信号的发送者（针对多个发送者的情况） 如果有多个对象都可能发送信号，并且我们希望根据信号发送者来采取不同的操作，可以使用QSignalMapper类。该类可以将多个对象与相应的信号关联起来，并通过sender()方法确定信号的发送者。 Many examples show how to do this with QSignalMapper, but it is not applicable when the signal carries a parameter, as with combobox. 然后可以将. There's aleady a built-in dock-widget menu. So for example if you want to have a timer who. For example: // slot method that you've connected all of your widgets' stateChanged (int) signals to void MyClass :: someWidgetsStateChanged (int newState) { const QObject * s = sender. QT supports a collection of events through its object QSignalMapper as demonstrated below: signalMapper = new QSignalMapper(this); signalMapper->setMapping(taxFileButton, QString("taxfile. You do not need a QSignalMapper if I understand you correctly but its difficult to tell as you hardly posted any code. I have 4 QLineEdits and 4 QPushButtons. 0. 在. The class supports the mapping of particular strings or integers with particular objects using setMapping (). A PySide6/QML application consists, at least, of two different files - a file with the QML description of the user interface, and a python file that loads the QML file. If I click onto a QPushButton, I want to set some text inside the corresponding QLineEdit. (Going forward the goal will be to. Here an example of what I need: (Note the slots) void MainWindow::HttpRequest (const QString & URL, QCustomWidget *Feed) { manager = new QNetworkAccessManager (this); reply = manager->get (QNetworkRequest (QUrl (URL))); connect (reply. #include <QtGui> class W: public QWidget { Q_OBJECT public: W (QWidget *parent=0): QWidget (parent) { // Create. For any interested, I worked around the problem using a closure, which seems a bit cleaner from a coding point of view, although I don't have any idea if it is more efficient or not: I'm trying to use QSignalMapper with my buttons, but I can't seem to get it to work to trigger my slot. 应用场景一般是 ：有一些信号，发送的参数. The following pages provide more information about Qt’s core features: The Meta-Object System. This is what I have so far: chess. QSignalMapper Example Revisited. The Map Viewer example shows how to display and interact with a map, search for an address, and find driving directions. takeAt (i)); for (int i = 0; i < Buttons. But I am not able to exactly place, which signal is to be called for which slot. QtCore. The optional named argument name defines the signal name. removeItem method rather than providing the subsystem an address to connect the function. On the #pyqt channel on Freenode, lauri asked about connecting identically-named signals with different parameters from QSignalMapper to slots. We would like to show you a description here but the site won’t allow us. It only want to work with integers. This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters. QSignalMapper class bundles signals from identifiable senders. ** ** Contact info@trolltech. For signals with default parameters,. clicked. In most main window style applications you would use the menuBar () function provided in QMainWindow, adding QMenu s to the menu bar and adding QAction s to the pop-up menus. map(sender) Parameters: sender – PySide6. – SPlatten. #Until then I'll stay with the qsignalmapper and qobject_cast which seems to work. . The basic syntax is : QTimer::singleShot (myTime, myObject, SLOT (myMethodInMyObject ())); with myTime the time in ms, myObject the object which contain the method and myMethodInMyObject the slot to call. 15, QSignalMapper::mapped had an overload for each of the four types of the single argument: QObject*, QWidget*, const QString& and int. But assuming it is a QDialog or QMainWindow, you have to do something along the following:. But I am not able to exactly place, which signal is to be called for which slot. 10 QSignalMapper is deprecated: This class is obsolete. . } Ignoring the “captured variables” part for now, here is a simple lambda which increments. 画像のような複数のUIの操作に応じて一つのUIを更新する処理は QSignalMapper が担ってきました。 しかし Qt5 では QSignalMapper は非推奨とされ、 ラムダ式 への置き換えが推奨されます。 Using a signal mapper. With separate slots, class signature change needed. If I correctly understood, each QGraphicsItem has special unique QComboBox. This signal is emitted when map () is signalled from an object that has an integer mapping set. This signal is emitted when map() is signalled from an object that has a string mapping set. The text of the menu item will be set to “About <application name>”. –The trade-off with QSignalMapper is that you gain information about the source of the signal, but you lose the original arguments. application::processEvents () { // process event list. The only function that we need to implement is the constructor: A list of texts is passed to the constructor. This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the signal. In this way the slot associated to the signal mapper is invoked only when the checkbox is checked and not when it is unchecked. (Going forward the goal will be to have the VerticalLineSegment s in. The QSignalMapper class bundles signals from identifiable senders. QSignalMapper offers int, QObject*, QWidget* and QString as mapping values. You can only use the signals that exist in QSignalMapper. There is a problem in the connection since the compiler cannot understand it since there are signal and slots overloads. lambda code. 1 Answer. __init__ (self, QObject parent = None)The parent argument, if not None, causes self to be owned by Qt instead of PyQt. This is because QML types are resolved at run-time, so they are not available to the C++ compiler. 上面的写法是非常繁琐的，Qt提供了一个类QSignalMapper，用于信号分发，类似于信号中转站：. 1,647 16 16 silver badges 30 30 bronze badges. Detailed Description. QWidget): def __init__ (self, parent=None): super (Widget, self). Eliminate QSignalMapper entirely and connect the button's clicked signal to mySlot. because you wrote it in your first answer to this post. Types used in signal/slot connections must be fully 'scoped' because the method call is converted into text, so your connection call should look like this: QObject::connect (&myClassA, SIGNAL (theSignal (namespace::myClassA::aStruct)), &myClassB, SLOT (theSlot (namespace::myClassA::aStruct))); You'll probably have to. I try to migrate my code from pyqt4 to pyqt5 and I have trouble dealing with QSignalMapper. Parameters: arg__1 – int. 1. [slot] void QSignalMapper:: map (QObject *sender) This slot emits signals based on the sender object. You shouldn't need to use QSignalMapper with QDialogButtonBox. By voting up you can indicate which examples are most useful and appropriate.