彻底改版2.0

third/3rd_qwt/qwt_column_symbol.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_COLUMN_SYMBOL_H
+#define QWT_COLUMN_SYMBOL_H
+
+#include "qwt_global.h"
+#include "qwt_interval.h"
+#include <qpen.h>
+#include <qsize.h>
+#include <qrect.h>
+
+class QPainter;
+class QPalette;
+class QRect;
+class QwtText;
+
+/*!
+    \brief Directed rectangle representing bounding rectangle and orientation
+    of a column.
+*/
+class QWT_EXPORT QwtColumnRect
+{
+public:
+    //! Direction of the column
+    enum Direction
+    {
+        //! From left to right
+        LeftToRight,
+
+        //! From right to left
+        RightToLeft,
+
+        //! From bottom to top
+        BottomToTop,
+
+        //! From top to bottom
+        TopToBottom
+    };
+
+    //! Build an rectangle with invalid intervals directed BottomToTop.
+    QwtColumnRect():
+        direction( BottomToTop )
+    {
+    }
+
+    //! \return A normalized QRect built from the intervals
+    QRectF toRect() const
+    {
+        QRectF r( hInterval.minValue(), vInterval.minValue(),
+            hInterval.maxValue() - hInterval.minValue(),
+            vInterval.maxValue() - vInterval.minValue() );
+        r = r.normalized();
+
+        if ( hInterval.borderFlags() & QwtInterval::ExcludeMinimum )
+            r.adjust( 1, 0, 0, 0 );
+        if ( hInterval.borderFlags() & QwtInterval::ExcludeMaximum )
+            r.adjust( 0, 0, -1, 0 );
+        if ( vInterval.borderFlags() & QwtInterval::ExcludeMinimum )
+            r.adjust( 0, 1, 0, 0 );
+        if ( vInterval.borderFlags() & QwtInterval::ExcludeMaximum )
+            r.adjust( 0, 0, 0, -1 );
+
+        return r;
+    }
+
+    //! \return Orientation
+    Qt::Orientation orientation() const
+    {
+        if ( direction == LeftToRight || direction == RightToLeft )
+            return Qt::Horizontal;
+
+        return Qt::Vertical;
+    }
+
+    //! Interval for the horizontal coordinates
+    QwtInterval hInterval;
+
+    //! Interval for the vertical coordinates
+    QwtInterval vInterval;
+
+    //! Direction
+    Direction direction;
+};
+
+//! A drawing primitive for columns
+class QWT_EXPORT QwtColumnSymbol
+{
+public:
+    /*!
+      Style
+      \sa setStyle(), style()
+    */
+    enum Style
+    {
+        //! No Style, the symbol draws nothing
+        NoStyle = -1,
+
+        /*!
+          The column is painted with a frame depending on the frameStyle()
+          and lineWidth() using the palette().
+         */
+        Box,
+
+        /*!
+          Styles >= QwtColumnSymbol::UserStyle are reserved for derived
+          classes of QwtColumnSymbol that overload draw() with
+          additional application specific symbol types.
+         */
+        UserStyle = 1000
+    };
+
+    /*!
+      Frame Style used in Box style().
+      \sa Style, setFrameStyle(), frameStyle(), setStyle(), setPalette()
+     */
+    enum FrameStyle
+    {
+        //! No frame
+        NoFrame,
+
+        //! A plain frame style
+        Plain,
+
+        //! A raised frame style
+        Raised
+    };
+
+public:
+    QwtColumnSymbol( Style = NoStyle );
+    virtual ~QwtColumnSymbol();
+
+    void setFrameStyle( FrameStyle );
+    FrameStyle frameStyle() const;
+
+    void setLineWidth( int width );
+    int lineWidth() const;
+
+    void setPalette( const QPalette & );
+    const QPalette &palette() const;
+
+    void setStyle( Style );
+    Style style() const;
+
+    virtual void draw( QPainter *, const QwtColumnRect & ) const;
+
+protected:
+    void drawBox( QPainter *, const QwtColumnRect & ) const;
+
+private:
+    class PrivateData;
+    PrivateData* d_data;
+};
+
+#endif