QWidgetAction stays visible after trigger() - c++

Question

I have a a QWidgetAction which holds a QWidget composed of a QLineEdit and a QPushButton. Once the user press the button the QWidgetAction call the trigger slot.
Now I have a QMenu which I activate with exec. The problem is that even though trigger is called (I've connected it to a print function as well to check) the menu won't close.
Regular QActions works well.
Any idea why?
P.S. Googling this issue I came across people with the same problem, but no solutions.

Answer 1

Years old question, but still I have an answer, hope it helps anybody!
I will describe my complete solution which not only hides the menu but also manages the visual representation.
QWidgetAction subclass: MyClass.h
class MyClass : public QWidgetAction {
Q_OBJECT
public:
MyClass(QObject* parent);
bool eventFilter(QObject*, QEvent*) override;
signals:
void mouseInside();
void mouseOutside();
protected:
QWidget* createWidget(QWidget* parent) override;
private:
QWidget* w;
QWidget* border;
QFormLayout *form;
QHBoxLayout *mainLayout;
}
QWidgetAction subclass MyClass.cpp
QWidget* MyClass::createWidget(QWidget* parent) {
w = new QWidget(parent);
border = new QWidget(parent);
mainLayout = new QHBoxLayout(w);
layout = new QFormLayout();
border->setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Maximum));
border->setMaximumWidth(10);
border->setMinimumWidth(10);
border->setMaximumHeight(1000); //Anything will do but it needs a height
mainLayout->setContentsMargins(0, 0, 0, 0);
mainLayout->setSpacing(0);
w->setLayout(mainLayout);
mainLayout->addWidget(border);
mainLayout->addLayout(layout);
layout->setContentsMargins(6, 11, 11, 11);
layout->setSpacing(6);
// Insert your widgets here, I used a QFormLayout
QLineEdit *l = new QLineEdit(w);
form->addRow("Test", l);
// I added a button to accept input
QPushButton* b = new QPushButton("Send", w);
connect(b, SIGNAL(clicked()), this, SLOT(trigger()));
layout->addWidget(b);
w->installEventFilter(this); // This is to avoid non button clicks to close the menu
return w;
}
bool MyClass::eventFilter(QObject*, QEvent* ev) {
if (ev->type() == QEvent::MouseButtonPress
|| ev->type() == QEvent::MouseButtonDblClick
|| ev->type() == QEvent::MouseButtonRelease) {
return true;
} else if (ev->type() == QEvent::Enter) {
border->setStyleSheet("background-color: #90c8f6;");
emit mouseInside();
} else if (ev->type() == QEvent::Leave) {
border->setStyleSheet("");
emit mouseOutside();
}
return false;
}
Finally to insert the QWidgetAction in a menu, in your code add the following:
QMenu *m = new QMenu(this);
MyClass *item = new MyClass(m);
connect(item, &QAction::triggered, [=] { m->hide(); YOUR CODE HERE}); // Add your action here
// This is to give a visual cue to your item, while deselecting the stuck
// action which was previously selected
connect(item, &MyClass::mouseInside, [=] { m->setActiveAction(nullptr); });
ui->yourButton->setMenu(m);
m->addAction(item);