diff --git a/modules/highgui/src/window_QT.cpp b/modules/highgui/src/window_QT.cpp
index 113606490c..5b9f288db7 100755
--- a/modules/highgui/src/window_QT.cpp
+++ b/modules/highgui/src/window_QT.cpp
@@ -627,12 +627,12 @@ CvTrackbar::CvTrackbar(CvWindow* arg, QString name, int* value, int count, CvTra
     //QFile qss(PATH_QSLIDERCSS);
     //if (qss.open(QFile::ReadOnly))
     //{
-        //slider->setStyleSheet(QLatin1String(qss.readAll()));
-        //qss.close();
+    //    slider->setStyleSheet(QLatin1String(qss.readAll()));
+    //    qss.close();
     //}
     
 
-    //does not work if we change the style with a stylesheet, why ?
+    //this next line does not work if we change the style with a stylesheet, why ? (bug in QT ?)
     //slider->setTickPosition(QSlider::TicksBelow);
     label = new QPushButton;
     label->setFlat(true);
diff --git a/modules/highgui/src/window_QT.h b/modules/highgui/src/window_QT.h
index 5c7e8d5cfb..d8f582b4f3 100644
--- a/modules/highgui/src/window_QT.h
+++ b/modules/highgui/src/window_QT.h
@@ -206,62 +206,60 @@ private slots:
 
 //here css for trackbar
 /* from http://thesmithfam.org/blog/2010/03/10/fancy-qslider-stylesheet */
-//#define PATH_QSLIDERCSS ":/qss/window_QT.qss"
-static const QString str_Trackbar_css = "QSlider::groove:horizontal {";/*
+static const QString str_Trackbar_css = QString("")
++										"QSlider::groove:horizontal {"
 +										"border: 1px solid #bbb;"
 +										"background: white;"
 +										"height: 10px;"
 +										"border-radius: 4px;"
++										"}"
+
++										"QSlider::sub-page:horizontal {"
++										"background: qlineargradient(x1: 0, y1: 0,    x2: 0, y2: 1,"
++										"stop: 0 #66e, stop: 1 #bbf);"
++										"background: qlineargradient(x1: 0, y1: 0.2, x2: 1, y2: 1,"
++										"stop: 0 #bbf, stop: 1 #55f);"
++										"border: 1px solid #777;"
++										"height: 10px;"
++										"border-radius: 4px;"
++										"}"
+
++										"QSlider::add-page:horizontal {"
++										"background: #fff;"
++										"border: 1px solid #777;"
++										"height: 10px;"
++										"border-radius: 4px;"
++										"}"
+										
++										"QSlider::handle:horizontal {"
++										"background: qlineargradient(x1:0, y1:0, x2:1, y2:1,"
++										"stop:0 #eee, stop:1 #ccc);"
++										"border: 1px solid #777;"
++										"width: 13px;"
++										"margin-top: -2px;"
++										"margin-bottom: -2px;"
++										"border-radius: 4px;"
++										"}"
+
++										"QSlider::handle:horizontal:hover {"
++										"background: qlineargradient(x1:0, y1:0, x2:1, y2:1,"
++										"stop:0 #fff, stop:1 #ddd);"
++										"border: 1px solid #444;"
++										"border-radius: 4px;"
++										"}"
+										
++										"QSlider::sub-page:horizontal:disabled {"
++										"background: #bbb;"
++										"border-color: #999;"
++										"}"
+										
++										"QSlider::add-page:horizontal:disabled {"
++										"background: #eee;"
++										"border-color: #999;"
++										"}"
+										
++										"QSlider::handle:horizontal:disabled {"
++										"background: #eee;"
++										"border: 1px solid #aaa;"
++										"border-radius: 4px;"
 +										"}";
-
-
-QSlider::sub-page:horizontal {
-background: qlineargradient(x1: 0, y1: 0,    x2: 0, y2: 1,
-stop: 0 #66e, stop: 1 #bbf);
-background: qlineargradient(x1: 0, y1: 0.2, x2: 1, y2: 1,
-stop: 0 #bbf, stop: 1 #55f);
-border: 1px solid #777;
-height: 10px;
-border-radius: 4px;
-}
-
-QSlider::add-page:horizontal {
-background: #fff;
-border: 1px solid #777;
-height: 10px;
-border-radius: 4px;
-}
-
-QSlider::handle:horizontal {
-background: qlineargradient(x1:0, y1:0, x2:1, y2:1,
-stop:0 #eee, stop:1 #ccc);
-border: 1px solid #777;
-width: 13px;
-margin-top: -2px;
-margin-bottom: -2px;
-border-radius: 4px;
-}
-
-QSlider::handle:horizontal:hover {
-background: qlineargradient(x1:0, y1:0, x2:1, y2:1,
-stop:0 #fff, stop:1 #ddd);
-border: 1px solid #444;
-border-radius: 4px;
-}
-
-QSlider::sub-page:horizontal:disabled {
-background: #bbb;
-border-color: #999;
-}
-
-QSlider::add-page:horizontal:disabled {
-background: #eee;
-border-color: #999;
-}
-
-QSlider::handle:horizontal:disabled {
-background: #eee;
-border: 1px solid #aaa;
-border-radius: 4px;
-}*/
-