1 files changed, 12 insertions, 0 deletions
diff --git a/vcl/source/control/prgsbar.cxx b/vcl/source/control/prgsbar.cxx
index 376ed91cfcdd..2531423a922f 100644
--- a/vcl/source/control/prgsbar.cxx
+++ b/vcl/source/control/prgsbar.cxx
@@ -22,6 +22,8 @@
 #include <vcl/prgsbar.hxx>
 #include <vcl/settings.hxx>
 #include <sal/log.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/idle.hxx>
 
 #define PROGRESSBAR_OFFSET          3
 #define PROGRESSBAR_WIN_OFFSET      2
@@ -174,6 +176,16 @@ void ProgressBar::SetValue( sal_uInt16 nNewPercent )
     {
         mnPercent = nNewPercent;
         Invalidate();
+
+        // Make sure the progressbar is actually painted even if the caller is busy with its task,
+        // so the main loop would not be invoked.
+        Idle aIdle("ProgressBar::SetValue aIdle");
+        aIdle.SetPriority(TaskPriority::POST_PAINT);
+        aIdle.Start();
+        while (aIdle.IsActive())
+        {
+            Application::Yield();
+        }
     }
 }