source: ntrip/branches/BNC_2.12/qwt/qwt_scale_draw.h@ 8142

Last change on this file since 8142 was 4271, checked in by mervart, 10 years ago
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1/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2 * Qwt Widget Library
3 * Copyright (C) 1997 Josef Wilgen
4 * Copyright (C) 2002 Uwe Rathmann
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the Qwt License, Version 1.0
8 *****************************************************************************/
9
10#ifndef QWT_SCALE_DRAW_H
11#define QWT_SCALE_DRAW_H
12
13#include "qwt_global.h"
14#include "qwt_abstract_scale_draw.h"
15#include <qpoint.h>
16#include <qrect.h>
17#include <qtransform.h>
18
19/*!
20 \brief A class for drawing scales
21
22 QwtScaleDraw can be used to draw linear or logarithmic scales.
23 A scale has a position, an alignment and a length, which can be specified .
24 The labels can be rotated and aligned
25 to the ticks using setLabelRotation() and setLabelAlignment().
26
27 After a scale division has been specified as a QwtScaleDiv object
28 using QwtAbstractScaleDraw::setScaleDiv(const QwtScaleDiv &s),
29 the scale can be drawn with the QwtAbstractScaleDraw::draw() member.
30*/
31
32class QWT_EXPORT QwtScaleDraw: public QwtAbstractScaleDraw
33{
34public:
35 /*!
36 Alignment of the scale draw
37 \sa setAlignment(), alignment()
38 */
39 enum Alignment
40 {
41 //! The scale is below
42 BottomScale,
43
44 //! The scale is above
45 TopScale,
46
47 //! The scale is left
48 LeftScale,
49
50 //! The scale is right
51 RightScale
52 };
53
54 QwtScaleDraw();
55 virtual ~QwtScaleDraw();
56
57 void getBorderDistHint( const QFont &, int &start, int &end ) const;
58 int minLabelDist( const QFont & ) const;
59
60 int minLength( const QFont & ) const;
61 virtual double extent( const QFont & ) const;
62
63 void move( double x, double y );
64 void move( const QPointF & );
65 void setLength( double length );
66
67 Alignment alignment() const;
68 void setAlignment( Alignment );
69
70 Qt::Orientation orientation() const;
71
72 QPointF pos() const;
73 double length() const;
74
75 void setLabelAlignment( Qt::Alignment );
76 Qt::Alignment labelAlignment() const;
77
78 void setLabelRotation( double rotation );
79 double labelRotation() const;
80
81 int maxLabelHeight( const QFont & ) const;
82 int maxLabelWidth( const QFont & ) const;
83
84 QPointF labelPosition( double val ) const;
85
86 QRectF labelRect( const QFont &, double val ) const;
87 QSizeF labelSize( const QFont &, double val ) const;
88
89 QRect boundingLabelRect( const QFont &, double val ) const;
90
91protected:
92 QTransform labelTransformation( const QPointF &, const QSizeF & ) const;
93
94 virtual void drawTick( QPainter *, double val, double len ) const;
95 virtual void drawBackbone( QPainter * ) const;
96 virtual void drawLabel( QPainter *, double val ) const;
97
98private:
99 QwtScaleDraw( const QwtScaleDraw & );
100 QwtScaleDraw &operator=( const QwtScaleDraw &other );
101
102 void updateMap();
103
104 class PrivateData;
105 PrivateData *d_data;
106};
107
108/*!
109 Move the position of the scale
110 \sa move(const QPointF &)
111*/
112inline void QwtScaleDraw::move( double x, double y )
113{
114 move( QPointF( x, y ) );
115}
116
117#endif
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