Defined constant to control thumbnail generation timeout.

Paint.cpp

@@ -182,12 +182,12 @@ bool Media::setUri(const QString &uri)
   // Try to get a sample from the current position.
   // NOTE: There is no guarantee the sample has yet been acquired.
   const uint* bits;
+  if (!impl_->waitForNextBits(ICON_TIMEOUT, (const uchar**)&bits))
   {
     qDebug() << "Second waiting wrong..." << endl;
     return false;
   }
 
-
   // Copy bits into thumbnail QImage.
   QImage thumbnail(getWidth(), getHeight(), QImage::Format_ARGB32);
   int i=0;

Paint.h

@@ -236,6 +236,10 @@ protected:
   QString uri;
   QIcon icon;
 
+public:
+  // Thumbnail generation timeout (in ms).
+  static const int ICON_TIMEOUT = 1000;
+
 public:
   Q_INVOKABLE Media(int id=NULL_UID);
   Media(const QString uri_, bool live, double rate, uid id=NULL_UID);