Qwt User's Guide: qwt_dial.h Source File

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qwt_dial.h

00001 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
00002  * Qwt Widget Library
00003  * Copyright (C) 1997   Josef Wilgen
00004  * Copyright (C) 2002   Uwe Rathmann
00005  *
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the Qwt License, Version 1.0
00008  *****************************************************************************/
00009 
00010 // vim: expandtab
00011 
00012 #ifndef QWT_DIAL_H
00013 #define QWT_DIAL_H 1
00014 
00015 #include <qframe.h>
00016 #include <qpalette.h>
00017 #include "qwt_global.h"
00018 #include "qwt_abstract_slider.h"
00019 #include "qwt_round_scale_draw.h"
00020 
00021 class QwtDialNeedle;
00022 class QwtDial;
00023 
00029 class QWT_EXPORT QwtDialScaleDraw: public QwtRoundScaleDraw
00030 {
00031 public:
00032     explicit QwtDialScaleDraw(QwtDial *);
00033     virtual QwtText label(double value) const;
00034 
00035     void setPenWidth(uint);
00036     uint penWidth() const;
00037 
00038 private:
00039     QwtDial *d_parent;
00040     int d_penWidth;
00041 };
00042 
00067 class QWT_EXPORT QwtDial: public QwtAbstractSlider
00068 {
00069     Q_OBJECT
00070 
00071     Q_ENUMS(Shadow)
00072     Q_ENUMS(Mode)
00073     Q_ENUMS(Direction)
00074 
00075     Q_PROPERTY(bool visibleBackground READ hasVisibleBackground WRITE showBackground)
00076     Q_PROPERTY(int lineWidth READ lineWidth WRITE setLineWidth)
00077     Q_PROPERTY(Shadow frameShadow READ frameShadow WRITE setFrameShadow)
00078     Q_PROPERTY(Mode mode READ mode WRITE setMode)
00079     Q_PROPERTY(double origin READ origin WRITE setOrigin)
00080     Q_PROPERTY(bool wrapping READ wrapping WRITE setWrapping)
00081     Q_PROPERTY(Direction direction READ direction WRITE setDirection)
00082 
00083     friend class QwtDialScaleDraw;
00084 public:
00085 
00094     enum Shadow
00095     {
00096         Plain = QFrame::Plain,
00097         Raised = QFrame::Raised,
00098         Sunken = QFrame::Sunken
00099     };
00100 
00102     enum ScaleOptions
00103     {
00104         ScaleBackbone = 1,
00105         ScaleTicks = 2,
00106         ScaleLabel = 4
00107     };
00108 
00114     enum Mode
00115     {
00116         RotateNeedle,
00117         RotateScale
00118     };
00119 
00123     enum Direction
00124     {
00125         Clockwise,
00126         CounterClockwise
00127     };
00128 
00129     explicit QwtDial( QWidget *parent = NULL);
00130 #if QT_VERSION < 0x040000
00131     explicit QwtDial( QWidget *parent, const char *name);
00132 #endif
00133 
00134     virtual ~QwtDial();
00135 
00136     void setFrameShadow(Shadow);
00137     Shadow frameShadow() const;
00138 
00139     bool hasVisibleBackground() const;
00140     void showBackground(bool);
00141 
00142     void setLineWidth(int);
00143     int lineWidth() const;
00144 
00145     void setMode(Mode);
00146     Mode mode() const;
00147 
00148     virtual void setWrapping(bool);
00149     bool wrapping() const;
00150 
00151     virtual void setScale(int maxMajIntv, int maxMinIntv, double step = 0.0);
00152 
00153     void setScaleArc(double min, double max);
00154     void setScaleOptions(int);
00155     void setScaleTicks(int minLen, int medLen, int majLen, int penWidth = 1);
00156 
00157     double minScaleArc() const;
00158     double maxScaleArc() const;
00159 
00160     virtual void setOrigin(double);
00161     double origin() const;
00162 
00163     void setDirection(Direction);
00164     Direction direction() const;
00165 
00166     virtual void setNeedle(QwtDialNeedle *);
00167     const QwtDialNeedle *needle() const;
00168     QwtDialNeedle *needle();
00169 
00170     QRect boundingRect() const;
00171     QRect contentsRect() const;
00172     virtual QRect scaleContentsRect() const;
00173 
00174     virtual QSize sizeHint() const;
00175     virtual QSize minimumSizeHint() const;
00176 
00177     virtual void setScaleDraw(QwtDialScaleDraw *);
00178 
00179     QwtDialScaleDraw *scaleDraw();
00180     const QwtDialScaleDraw *scaleDraw() const;
00181 
00182 protected:
00183     virtual void paintEvent(QPaintEvent *);
00184     virtual void resizeEvent(QResizeEvent *);
00185     virtual void keyPressEvent(QKeyEvent *);
00186 
00187     virtual void updateMask();
00188 
00189     virtual void drawFrame(QPainter *p);
00190     virtual void drawContents(QPainter *) const;
00191     virtual void drawFocusIndicator(QPainter *) const;
00192 
00193     virtual void drawScale(QPainter *, const QPoint &center,
00194         int radius, double origin, double arcMin, double arcMax) const;
00195 
00205     virtual void drawScaleContents(QPainter *painter, const QPoint &center, 
00206         int radius) const;
00207 
00208     virtual void drawNeedle(QPainter *, const QPoint &, 
00209         int radius, double direction, QPalette::ColorGroup) const;
00210 
00211     virtual QwtText scaleLabel(double) const;
00212     void updateScale();
00213 
00214     virtual void rangeChange();
00215     virtual void valueChange();
00216 
00217     virtual double getValue(const QPoint &);
00218     virtual void getScrollMode(const QPoint &, 
00219         int &scrollMode, int &direction);
00220 
00221 private:
00222     void initDial();
00223 
00224     class PrivateData;
00225     PrivateData *d_data;
00226 };
00227 
00228 #endif
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