Wt

XHTML tooltips are not visible in WDialog and derived classes using github Wt 3.3.3-19-gad17d0b.

An attached test program demonstrates the issue using a WMessageBox. The problem appears related to z-index rules in transitions.css, moz-transitions.css, and webkit-transitions.css:

.in, .out.reverse {
        z-index: 10;
}

.out, .in.reverse {
        z-index: 0;
}

As a test, I commented these lines out and that helps with the tooltip visibility issue. However, I am concerned about side-effects from this modification as it seems overly broad.

NOTE: If you run the test program under valgrind, it will report an unrelated issue; the iconChanged_ member of WIcon can be accessed while still uninitialized.