fixed OpenGL in nvidia (there is a CPU ussage issue with vsync)

YACReader/width_slider.h

@@ -0,0 +1,29 @@
+#ifndef WIDTH_SLIDER_H
+#define WIDTH_SLIDER_H
+
+#include <QWidgetAction>
+
+class QLabel;
+class QSlider;
+
+class YACReaderSliderAction : public QWidgetAction 
+{
+	Q_OBJECT
+private:
+	QLabel * percentageLabel;
+	QSlider * slider;
+
+public:
+	
+	YACReaderSliderAction (QWidget * parent = 0);
+
+public slots:
+	void updateText(int value);
+	void updateFitToWidthRatio(float v);
+
+
+signals:
+	void fitToWidthRatioChanged(float value);
+};
+
+#endif