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lcdrange.h Example File
tutorials/tutorial/t8/lcdrange.h

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 #ifndef LCDRANGE_H
 #define LCDRANGE_H

 #include <QWidget>

 class QSlider;

 class LCDRange : public QWidget
 {
     Q_OBJECT

 public:
     LCDRange(QWidget *parent = 0);

     int value() const;

 public slots:
     void setValue(int value);
     void setRange(int minValue, int maxValue);

 signals:
     void valueChanged(int newValue);

 private:
     QSlider *slider;
 };

 #endif