Display the QListView as drop down on clicking a button

[thomasjohnaj]

Hi,

I am looking for a solution to display the QListView as a drop down on clicking a button. I tried the following way code,the QListWidget is not coming exactly below the button. it is coming at a different place. Also on re click of the button,the QListWidget should disappear.

QPushButton *b = new QPushButton("Click Me");	
QListWidget *w = new QListWidget();
w->setWindowFlags(Qt::Dialog | Qt::MSWindowsFixedSizeDialogHint | Qt::WindowStaysOnTopHint);
w->setWindowFlags(Qt::Dialog | Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
w->setWindowFlags(Qt::Popup | Qt::FramelessWindowHint | Qt::WindowCloseButtonHint);
QStringList items;
items << "foo" << "bar" << "baz";
w->addItems(items);
w->move(600, 66);
b->show();
QObject::connect(b, SIGNAL(clicked()), w, SLOT(show()));

Any suggestion on this.

/edit by moderation: added code tags

[JonB]

@thomasjohnaj
I'm not sure whether my situation helps with whatever you are trying to obtain exactly. But recently I wanted a popup widget to appear "touching" the QPushButton which is used to display it. I had problems getting the coordinates correct. The following works:

UIUtils::PushButtonWithPopup::PushButtonWithPopup(QWidget *parent /*= nullptr*/) :
    QPushButton(parent)
{
    QCommonStyle style;
    setIcon(style.standardIcon(QStyle::SP_ArrowUp));

    // popup window flags (popup with no frame)
    _popup.setWindowFlags(Qt::Popup | Qt::FramelessWindowHint);
    // popup as small as possible
    _popup.setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);

    // connect button click to execute the popup
    connect(this, &QPushButton::clicked, this, &UIUtils::PushButtonWithPopup::doPopup);
}

/*slot*/ void UIUtils::PushButtonWithPopup::doPopup()
{
    // position the popup just above the button
    QPoint pos = this->mapToGlobal(QPoint(0, 0));
    // show the popup
    _popup.show();
    // can only get its height to position it after it is shown
    _popup.move(pos.x(), pos.y() - _popup.height());
}

The important thing being the QPoint pos = this->mapToGlobal(QPoint(0, 0));.

Once the popup is shown, user must click anywhere outside the popup to dismiss.

[thomasjohnaj]

@JonB I positioned it below the button with the sample code attached, but I have to address two issues

1. the dropdown should go off on pressing the button again
2. the dropdown windows should have the top priority

[JonB]

@thomasjohnaj said in Display the QListView as drop down on clicking a button:

the dropdown should go off on pressing the button again

All I know is if you click outside mine it disappears. Doesn't matter where, button or not.