+
+bool
+ImageFileDocument::Revert ()
+{
+ if (IsModified()) {
+ wxString msg ("Revert to saved ");
+ msg += GetFilename();
+ msg += "?";
+ wxMessageDialog dialog (getView()->getFrame(), msg, "Are you sure?", wxYES_NO | wxNO_DEFAULT);
+ if (dialog.ShowModal() == wxID_YES) {
+ if (theApp->getVerboseLogging())
+ *theApp->getLog() << "Reverting to saved " << GetFilename() << "\n";
+ Modify (false);
+ OnOpenDocument (GetFilename());
+ }
+ }
+ getView()->OnUpdate (getView(), NULL);
+ UpdateAllViews();
+
+ return true;
+}
+
+// BackgroundProcessingDocument - Base Class
+
+IMPLEMENT_DYNAMIC_CLASS(BackgroundProcessingDocument, wxDocument)
+BEGIN_EVENT_TABLE(BackgroundProcessingDocument, wxDocument)
+END_EVENT_TABLE()
+
+#ifdef HAVE_WXTHREADS
+void
+BackgroundProcessingDocument::addBackgroundSupervisor (BackgroundSupervisor* pSupervisor)
+{
+ wxCriticalSectionLocker locker (m_criticalSection);
+ if (pSupervisor)
+ m_vecpBackgroundSupervisors.push_back (pSupervisor);
+}
+
+void
+BackgroundProcessingDocument::removeBackgroundSupervisor (BackgroundSupervisor* pSupervisor)
+{
+ m_criticalSection.Enter();
+ bool bFound = false;
+ for (BackgroundContainer::iterator i = m_vecpBackgroundSupervisors.begin();
+ i != m_vecpBackgroundSupervisors.end();
+ i++)
+ if (*i == pSupervisor) {
+ m_vecpBackgroundSupervisors.erase(i);
+ bFound = true;
+ break;
+ }
+ m_criticalSection.Leave();
+
+ if (! bFound)
+ sys_error (ERR_SEVERE, "Could not find background task [OnRemoveBackground]");
+}
+#endif
+
+void
+BackgroundProcessingDocument::cancelRunningTasks()
+{
+#ifdef HAVE_WXTHREADS
+ m_criticalSection.Enter();
+ for (BackgroundContainer::iterator i = m_vecpBackgroundSupervisors.begin();
+ i != m_vecpBackgroundSupervisors.end(); i++)
+ (*i)->onCancel();
+ m_criticalSection.Leave();
+
+ while (m_vecpBackgroundSupervisors.size() > 0) {
+ ::wxYield();
+ ::wxUsleep(50);
+ }
+#endif
+}
+
+