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?