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Editorial Team
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Asked: 2026-05-20T07:35:09+00:00

I am working on a graphics view (using C++ and Qt) which contains quite

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I am working on a graphics view (using C++ and Qt) which contains quite a few svg images. I intercept clicks on them, but i’d like not to receive events (or to be able to ignore them) when mouse is over transparent parts of svg items.

Is it possible ?
Should svg files be specifically designed for such use ?
Is there some hidden Qt option i have not (yet) heard of ?

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  1. Editorial Team

    Having no other choice but to find out the hard way the answer to my question, here is what i did :

    • looked for mousePressEvent definition in QGraphicsSvgItem.cpp. Found none.
    • looked for mousePressEvent definition in QGraphicsItem.cpp (ancestor of QGraphicsSvgItem). The method exists but no relevant action could be found there.
    • looked for mousePressEvent calls in QGraphicsItem.cpp. Found myself reading the code of QGraphicsItem::sceneEvent(), dispatcher of mouse events for a Qt graphics scene. There does not seem to be any sort of differentiating different zones of graphic items.

    Hence the sad answer : Qt does not permit such a behaviour.

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