Postpone error message display if not in GUI thread

Calls to report_error() crashed if not called from GUI thread.
Fix this by postponing error message display if not in GUI thread.
Code that creates a thread which possibly calls report_error()
is responsible for calling MainWindow::showErrors() to flush
the accumulated messages.

Note that there is a race condition in report_error() and
get_error_string(). Nevertheless, hitting it should be rather
unlikely (two threads producing error messages at the same time)
and hopefully it can be fixed rather easily.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2017-10-31 21:28:59 +01:00 committed by Dirk Hohndel
parent 945a0a8748
commit 3acc28cebf
3 changed files with 21 additions and 3 deletions

View file

@ -220,6 +220,10 @@ void DownloadFromDCWidget::updateState(states state)
// got an error
else if (state == ERROR) {
timer->stop();
// Show messages that worker thread produced.
MainWindow::instance()->showErrors();
QMessageBox::critical(this, TITLE_OR_TEXT(tr("Error"), thread.error), QMessageBox::Ok);
markChildrenAsEnabled();
progress_bar_text = "";