cantata-2.0.1-mpris-plasma57.patch

Work-around KDE 5.7 MPRIS issues. 

diff --git a/gui/mainwindow.cpp b/gui/mainwindow.cpp
index cc2b532..37eec9e 100644
--- a/gui/mainwindow.cpp
+++ b/gui/mainwindow.cpp
@@ -1410,8 +1410,8 @@ void MainWindow::setRating()
     }
 }
 
-void MainWindow::readSettings()
-{    
+void MainWindow::initMpris()
+{
     #ifdef QT_QTDBUS_FOUND
     if (Settings::self()->mpris()) {
         if (!mpris) {
@@ -1424,6 +1424,16 @@ void MainWindow::readSettings()
         mpris=0;
     }
     CurrentCover::self()->setEnabled(mpris || Settings::self()->showPopups() || 0!=Settings::self()->playQueueBackground() || Settings::self()->showCoverWidget());
+    #endif
+}
+
+void MainWindow::readSettings()
+{    
+    #ifdef QT_QTDBUS_FOUND
+    // It appears as if the KDE MPRIS code does not like the MPRIS interface to be setup before the window is visible.
+    // to work-around this, initMpris in the next event loop iteration.
+    // See #863
+    QTimer::singleShot(0, this, SLOT(initMpris()));
     #else
     CurrentCover::self()->setEnabled(Settings::self()->showPopups() || 0!=Settings::self()->playQueueBackground() || Settings::self()->showCoverWidget());
     #endif
diff --git a/gui/mainwindow.h b/gui/mainwindow.h
index 6d6e960..aa3a80a 100644
--- a/gui/mainwindow.h
+++ b/gui/mainwindow.h
@@ -268,6 +268,7 @@ public Q_SLOTS:
 private Q_SLOTS:
     void toggleContext();
     void toggleMenubar();
+    void initMpris();
 
 private:
     int prevPage;