彻底改版2.0

third/qwtdemo/examples/oscilloscope/signaldata.h

@@ -0,0 +1,33 @@
+#ifndef _SIGNAL_DATA_H_
+#define _SIGNAL_DATA_H_ 1
+
+#include <qrect.h>
+
+class SignalData
+{
+public:
+    static SignalData &instance();
+
+    void append( const QPointF &pos );
+    void clearStaleValues( double min );
+
+    int size() const;
+    QPointF value( int index ) const;
+
+    QRectF boundingRect() const;
+
+    void lock();
+    void unlock();
+
+private:
+    SignalData();
+    SignalData( const SignalData & );
+    SignalData &operator=( const SignalData & );
+
+    virtual ~SignalData();
+
+    class PrivateData;
+    PrivateData *d_data;
+};
+
+#endif