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examples/oscilloscope/Knob.h

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+/*****************************************************************************
+ * Qwt Examples - Copyright (C) 2002 Uwe Rathmann
+ * This file may be used under the terms of the 3-clause BSD License
+ *****************************************************************************/
+
+#pragma once
+
+#include <QwtGlobal>
+#include <QWidget>
+
+class QwtKnob;
+class QLabel;
+
+class Knob : public QWidget
+{
+    Q_OBJECT
+
+    Q_PROPERTY( QColor theme READ theme WRITE setTheme )
+
+  public:
+    Knob( const QString& title,
+        double min, double max, QWidget* parent = NULL );
+
+    virtual QSize sizeHint() const QWT_OVERRIDE;
+
+    void setValue( double value );
+    double value() const;
+
+    void setTheme( const QColor& );
+    QColor theme() const;
+
+  Q_SIGNALS:
+    double valueChanged( double );
+
+  protected:
+    virtual void resizeEvent( QResizeEvent* ) QWT_OVERRIDE;
+
+  private:
+    QwtKnob* m_knob;
+    QLabel* m_label;
+};