Closing the popup of the combobox with tree view

Bert59

Hi,
This is a follow-up post of the following
https://forum.qt.io/topic/125326/presetting-a-combobox-to-one-of-its-tree-view-popup-entry
With a tree view in the popup panel of the combobox one needs to reimplement showPopup and hidePopup. If not, it is not possible to select a child item because the popup is closing wenn you click on a parent item for openning the childs branch.

void TreeBox::hidePopup()
{
    if (m_hide==true)
    {
        QComboBox::hidePopup();
        m_hide = false;
    }
}

I also had to reimplement the eventFilter on this object

bool TreeBox::eventFilter(QObject *watched, QEvent *event)
{
    if (event->type() == QEvent::MouseButtonPress && watched == m_tree->viewport())
    {
        QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
        QModelIndex index = view()->indexAt(mouseEvent->pos());

        if (index.parent().row()==-1)
            m_hide = false;
        else
            m_hide = true;
   }
    return false;
}

Each time one clicks an item on the popup panel the hidePopup slot is called but I forward the signal only if the user has clicked on a child item.

The issue I have now is that when I click outside the popup panel it will not close as it does on a regular Combobox.
I checked that the hidePopup slot is called but because I didn't click on a child item m_hide is false and the panel is not closed.

So my question is, how can I get the information that I clicked outside the popup panel?

Bert59

Thank you,

In fact adding your usggestion didn't work because a click outside the combobox didn't trigger the MouseButtonPressed.

But your suggestion gave me the idea to check what kind of events were triggered when cliking outside the combobox.
I noticed that there is a mouseLeave event so I modified the eventFilter slot as follows:

bool TreeBox::eventFilter(QObject *watched, QEvent *event)
{
if (event->type() == QEvent::MouseButtonPress && watched == m_tree->viewport())
    {
        QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
        QModelIndex index = view()->indexAt(mouseEvent->pos());

        if (index.parent().row()==-1)
            m_hide = false;
        else
           m_hide = true;
      }
    else if (event->type() == QEvent::HoverLeave)
    {
         m_hide = true;
    }
}

Now it's working

gde23

if you click outside then the index should be invalid.
Add something like this:

if(!index.isValid()) {
    m_hide = true;
    return;
}

Bert59

Thank you,

In fact adding your usggestion didn't work because a click outside the combobox didn't trigger the MouseButtonPressed.

But your suggestion gave me the idea to check what kind of events were triggered when cliking outside the combobox.
I noticed that there is a mouseLeave event so I modified the eventFilter slot as follows:

bool TreeBox::eventFilter(QObject *watched, QEvent *event)
{
if (event->type() == QEvent::MouseButtonPress && watched == m_tree->viewport())
    {
        QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
        QModelIndex index = view()->indexAt(mouseEvent->pos());

        if (index.parent().row()==-1)
            m_hide = false;
        else
           m_hide = true;
      }
    else if (event->type() == QEvent::HoverLeave)
    {
         m_hide = true;
    }
}

Now it's working