Gui: Fix comparison of argument of clicked() with StandardButton

Fixes #14639: Comparison between integers and StandardButton fails for Python task dialogs with PySide6

src/Gui/PythonWrapper.cpp

@@ -619,6 +619,25 @@ qsizetype PythonWrapper::toEnum(const Py::Object& pyobject)
     return toEnum(pyobject.ptr());
 }
 
+Py::Object PythonWrapper::tryToStandardButton(qsizetype value)
+{
+    std::stringstream cmd;
+    cmd << "from PySide import QtWidgets\n";
+    cmd << "btn = QtWidgets.QDialogButtonBox.StandardButton(" << value << ")";
+    return Py::asObject(Base::Interpreter().getValue(cmd.str().c_str(), "btn"));
+}
+
+Py::Object PythonWrapper::toStandardButton(qsizetype value)
+{
+    try {
+        return tryToStandardButton(value);
+    }
+    catch (Py::Exception& e) {
+        e.clear();
+        return Py::Long(value);
+    }
+}
+
 QGraphicsItem* PythonWrapper::toQGraphicsItem(PyObject* pyPtr)
 {
     return qt_getCppType<QGraphicsItem>(pyPtr);

src/Gui/PythonWrapper.h

@@ -56,6 +56,7 @@ public:
     QObject* toQObject(const Py::Object&);
     qsizetype toEnum(PyObject* pyPtr);
     qsizetype toEnum(const Py::Object& pyobject);
+    Py::Object toStandardButton(qsizetype);
     QGraphicsItem* toQGraphicsItem(PyObject* ptr);
     QGraphicsItem* toQGraphicsItem(const Py::Object& pyObject);
     QGraphicsObject* toQGraphicsObject(PyObject* pyPtr);
@@ -82,6 +83,7 @@ public:
 
 private:
     qsizetype tryEnum(PyObject* pyPtr);
+    Py::Object tryToStandardButton(qsizetype value);
 };
 
 } // namespace Gui

src/Gui/TaskView/TaskDialogPython.cpp

@@ -641,8 +641,9 @@ void TaskDialogPython::clicked(int i)
     try {
         if (dlg.hasAttr(std::string("clicked"))) {
             Py::Callable method(dlg.getAttr(std::string("clicked")));
+            PythonWrapper wrap;
             Py::Tuple args(1);
-            args.setItem(0, Py::Int(i));
+            args.setItem(0, wrap.toStandardButton(i));
             method.apply(args);
         }
     }