Wt

If all files are cancelled in the drop event, the first file in the files vector will nevertheless be uploaded.

wt-4.0.2

To reproduce:

dropWidget = template->bindNew<Wt::WFileDropWidget>("dropFile");
dropWidget->drop().connect(this, &MyWidget::onFileDropped);

void MyWidget::onFileDropped(std::vector<Wt::WFileDropWidget::File*> vFiles) {
    for (auto f : vFiles) {
        dropWidget->cancelUpload(f);
    }
}