Entry and exit signal syntax for qlistwidget[solved]

[tanmay2227]

i am trying to implement a slot for whenever the mouse enters the vicinity of a list . but all the tries i have attempted have failed so far can you please tell me what is the correct syntax.

i want a function to perform whenever the cursor enters the list it performs a particular function and when it leaves it shuts the function.

i can implement the entered signal but there is no signal for leaving the list

[tanmay2227]

do i have to use mouse events only cant i work with only signals for this

[SGaist]

Hi,

You can reimplement the mouseEnterEvent and mouseLeaveEvent and emit a signal from there

[tanmay2227]

thanks that is working in my application but when i try to implement it in a custom widget its showing the the event to be undefined

[tanmay2227]

bool MyList::eventFilter(QObject* object, QEvent* event )
{
if (object==this)
{
if(event==QEvent::Enter)
{
for(int i=1;i<count();i++)
{

            setRowHidden(i,false);
        }
        setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
        setMaximumHeight(60);
    }
    if(event->type()==QEvent::Leave)
    {
        for(int i=0;i<count()-1;i++)
        {
           setRowHidden(i,true);
        }
        setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
        setMaximumHeight(60);
        setMaximumHeight(20);
    }
}
return false;

}

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i am implementing a class subclassing a qlistwidget

---

C:\Qt\Qt5.0.1\Tools\QtCreator\bin\MyListPlugin\mylist.cpp:21: error: C2027: use of undefined type 'QEvent'
'
C:\Qt\Qt5.0.1\Tools\QtCreator\bin\MyListPlugin\mylist.cpp:21: error: C2227: left of '->type' must point to class/struct/union/generic type

---

why is that
cant events be implemented with widgets

[tanmay2227]

thanks its working now .
it seems i have to work with qwidgets class when subclassing for qwidget
thank you sgaist