source: ntrip/trunk/BNC/qwt/qwt_abstract_scale_draw.h@ 8135

Last change on this file since 8135 was 8127, checked in by stoecker, 7 years ago

update qwt and qwtpolar, many QT5 fixes (unfinished)

File size: 3.5 KB
RevLine 
[4271]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_ABSTRACT_SCALE_DRAW_H
11#define QWT_ABSTRACT_SCALE_DRAW_H
12
13#include "qwt_global.h"
14#include "qwt_scale_div.h"
15#include "qwt_text.h"
16
17class QPalette;
18class QPainter;
19class QFont;
[8127]20class QwtTransform;
[4271]21class QwtScaleMap;
22
23/*!
24 \brief A abstract base class for drawing scales
25
26 QwtAbstractScaleDraw can be used to draw linear or logarithmic scales.
27
28 After a scale division has been specified as a QwtScaleDiv object
[8127]29 using setScaleDiv(), the scale can be drawn with the draw() member.
[4271]30*/
31class QWT_EXPORT QwtAbstractScaleDraw
32{
33public:
34
35 /*!
36 Components of a scale
37 \sa enableComponent(), hasComponent
38 */
39 enum ScaleComponent
40 {
41 //! Backbone = the line where the ticks are located
42 Backbone = 0x01,
43
44 //! Ticks
45 Ticks = 0x02,
46
47 //! Labels
48 Labels = 0x04
49 };
50
51 //! Scale components
52 typedef QFlags<ScaleComponent> ScaleComponents;
53
54 QwtAbstractScaleDraw();
55 virtual ~QwtAbstractScaleDraw();
56
57 void setScaleDiv( const QwtScaleDiv &s );
58 const QwtScaleDiv& scaleDiv() const;
59
[8127]60 void setTransformation( QwtTransform * );
[4271]61 const QwtScaleMap &scaleMap() const;
62 QwtScaleMap &scaleMap();
63
64 void enableComponent( ScaleComponent, bool enable = true );
65 bool hasComponent( ScaleComponent ) const;
66
67 void setTickLength( QwtScaleDiv::TickType, double length );
68 double tickLength( QwtScaleDiv::TickType ) const;
69 double maxTickLength() const;
70
71 void setSpacing( double margin );
72 double spacing() const;
73
74 void setPenWidth( int width );
75 int penWidth() const;
76
77 virtual void draw( QPainter *, const QPalette & ) const;
78
79 virtual QwtText label( double ) const;
80
81 /*!
82 Calculate the extent
83
[8127]84 The extent is the distance from the baseline to the outermost
[4271]85 pixel of the scale draw in opposite to its orientation.
86 It is at least minimumExtent() pixels.
87
[8127]88 \param font Font used for drawing the tick labels
89 \return Number of pixels
90
[4271]91 \sa setMinimumExtent(), minimumExtent()
92 */
[8127]93 virtual double extent( const QFont &font ) const = 0;
[4271]94
95 void setMinimumExtent( double );
96 double minimumExtent() const;
97
98protected:
99 /*!
100 Draw a tick
101
102 \param painter Painter
103 \param value Value of the tick
[8127]104 \param len Length of the tick
[4271]105
106 \sa drawBackbone(), drawLabel()
107 */
108 virtual void drawTick( QPainter *painter, double value, double len ) const = 0;
109
110 /*!
111 Draws the baseline of the scale
112 \param painter Painter
113
114 \sa drawTick(), drawLabel()
115 */
116 virtual void drawBackbone( QPainter *painter ) const = 0;
117
118 /*!
119 Draws the label for a major scale tick
120
121 \param painter Painter
122 \param value Value
123
124 \sa drawTick(), drawBackbone()
125 */
126 virtual void drawLabel( QPainter *painter, double value ) const = 0;
127
128 void invalidateCache();
129 const QwtText &tickLabel( const QFont &, double value ) const;
130
131private:
132 QwtAbstractScaleDraw( const QwtAbstractScaleDraw & );
133 QwtAbstractScaleDraw &operator=( const QwtAbstractScaleDraw & );
134
135 class PrivateData;
136 PrivateData *d_data;
137};
138
139Q_DECLARE_OPERATORS_FOR_FLAGS( QwtAbstractScaleDraw::ScaleComponents )
140
141#endif
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