Question

I have a flowlayout that shows movie thumbnails (subclassed qwidgets). When I click a thumbnail, it’s marked as selected by setting a stylesheet to it (css border). What I want to do is, if I 1) click another thumbnail, or 2) click the widget that holds the flowlayout, it should be marked as unselected.

I’ve currently implemented the mousePressEvent(QMouseEvent *) method to draw the border when the thumbnail is clicked. I’m not sure how to proceed with marking it as unselected. Thanks.

Answer 1

You can store link to currently selected widget somewhere and unselect it when selecting some other.
Something like this:

someClass::someClass():
activeWidget(0)
{
    for(......)
    {
        subclassedQWidget *w = new subclassedQWidget(this);
        // ......
        // ......
        QObject::connect(w, SIGNAL(iAmClicked()), this, SLOT(someoneClicked()))
    }

}

someClass::someoneClicked()
{
    subclassedQWidget *caller = (subclassedQWidget*)QObject::sender();
    if (caller == activeWidget) {return;} //Do nothing when active widget clicked
    if (activeWidget) activeWidget->unSelect();
    if (caller)
    {
        caller->select();
        activeWidget = caller;
    }
}

in mousePressEvent in Your subclassedQWidget You simply emit iAmClicked()