新增qwt源码版本

qwtdemo/examples/oscilloscope/mainwindow.h

@@ -0,0 +1,32 @@
+#include <qwidget.h>
+
+class Plot;
+class Knob;
+class WheelBox;
+
+class MainWindow : public QWidget
+{
+    Q_OBJECT
+
+public:
+    MainWindow( QWidget * = NULL );
+
+    void start();
+
+    double amplitude() const;
+    double frequency() const;
+    double signalInterval() const;
+
+Q_SIGNALS:
+    void amplitudeChanged( double );
+    void frequencyChanged( double );
+    void signalIntervalChanged( double );
+
+private:
+    Knob *d_frequencyKnob;
+    Knob *d_amplitudeKnob;
+    WheelBox *d_timerWheel;
+    WheelBox *d_intervalWheel;
+
+    Plot *d_plot;
+};