彻底改版2.0

third/3rd_qwt/qwt_plot_magnifier.h

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+/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
+ * Qwt Widget Library
+ * Copyright (C) 1997   Josef Wilgen
+ * Copyright (C) 2002   Uwe Rathmann
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the Qwt License, Version 1.0
+ *****************************************************************************/
+
+#ifndef QWT_PLOT_MAGNIFIER_H
+#define QWT_PLOT_MAGNIFIER_H 1
+
+#include "qwt_global.h"
+#include "qwt_magnifier.h"
+
+class QwtPlot;
+
+/*!
+  \brief QwtPlotMagnifier provides zooming, by magnifying in steps.
+
+  Using QwtPlotMagnifier a plot can be zoomed in/out in steps using
+  keys, the mouse wheel or moving a mouse button in vertical direction.
+
+  Together with QwtPlotZoomer and QwtPlotPanner it is possible to implement
+  individual and powerful navigation of the plot canvas.
+
+  \sa QwtPlotZoomer, QwtPlotPanner, QwtPlot
+*/
+class QWT_EXPORT QwtPlotMagnifier: public QwtMagnifier
+{
+    Q_OBJECT
+
+public:
+    explicit QwtPlotMagnifier( QWidget * );
+    virtual ~QwtPlotMagnifier();
+
+    void setAxisEnabled( int axis, bool on );
+    bool isAxisEnabled( int axis ) const;
+
+    QWidget *canvas();
+    const QWidget *canvas() const;
+
+    QwtPlot *plot();
+    const QwtPlot *plot() const;
+
+protected:
+    virtual void rescale( double factor );
+
+private:
+    class PrivateData;
+    PrivateData *d_data;
+};
+
+#endif