Enter and Leave events using QQuickItem

[Zamx]

Hi,

I want to highlight my items when the mouse moves over them. So I need a way to know when the mouse enters my item and when it leaves. With QWidget I would use EnterEvent and LeaveEvent. But these nice functions don't exist for QQuickItem.

I tried overloading HoverEnterEvent and HoverLeaveEvent, but they only partially give the result I need. When I move the mouse for a parent to a child, I still get hover events from the parent.

Any help is appreciated.

[fdrk]

You can do this easely with states, I've used it myself to render an item with opacity when the mouse is held over it:
@
MouseArea {
id: delegateImgMouseArea;
anchors.fill: parent;
hoverEnabled: true;
}

    states: State {
        when: delegateImgMouseArea.containsMouse;
        PropertyChanges {
            target: delegateImg;
            opacity: 1;
        }
    }

@

Edit: please use @ tags around code sections; Andre

[Zamx]

Thanks for your answer fdrk, but I looking for a solution in C++.

Currently I keep a stack of current widgets I hover over, then when I receive a hover leave event I pop the stack and highlight the front of the stack. But I would like a cleaner solution.

[diro]

Zamx, will you need a C++ solution?
With MouseArea, you can call a C++ function, I think it is a cleaner and easier solution.

[lgeyer]

[quote author="Zamx" date="1341403462"]I tried overloading HoverEnterEvent and HoverLeaveEvent, but they only partially give the result I need. When I move the mouse for a parent to a child, I still get hover events from the parent.[/quote]This is the default behaviour for QHoverEvent, which can be disabled by setting the Qt::WA_NoMousePropagation attribute.

[Zamx]

[quote author="diro" date="1341460818"]Zamx, will you need a C++ solution?
With MouseArea, you can call a C++ function, I think it is a cleaner and easier solution.[/quote]

I'm using C++, because creating a lot of custom QQuickItem's and I want them all to have the same mouse behaviour.

[quote author="Lukas Geyer" date="1341468186"]This is the default behaviour for QHoverEvent, which can be disabled by setting the Qt::WA_NoMousePropagation attribute.[/quote]

Can I use Qt::WA_NoMousePropagation? Because then I need to call setAttribute( ... ) which QQuickItem doesn't have.

[lgeyer]

Well, that's actually right. Do you mind filing a "bug report":http://qt-project.org/doc/qt-5.0/bughowto.html?

[Zamx]

[quote author="Lukas Geyer" date="1341473151"]Well, that's actually right. Do you mind filing a "bug report":http://qt-project.org/doc/qt-5.0/bughowto.html?[/quote]

Done. https://bugreports.qt-project.org/browse/QTBUG-26434

[andre]

Could you post a link to the bugreport please?