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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
    00074     Q_PROPERTY(bool visibleBackground READ hasVisibleBackground WRITE showBackground)
    00075     Q_PROPERTY(int lineWidth READ lineWidth WRITE setLineWidth)
    00076     Q_PROPERTY(Shadow frameShadow READ frameShadow WRITE setFrameShadow)
    00077     Q_PROPERTY(Mode mode READ mode WRITE setMode)
    00078     Q_PROPERTY(double origin READ origin WRITE setOrigin)
    00079     Q_PROPERTY(bool wrapping READ wrapping WRITE setWrapping)
    00080
    00081     friend class QwtDialScaleDraw;
    00082 public:
    00083
    00092     enum Shadow
    00093     {
    00094         Plain = QFrame::Plain,
    00095         Raised = QFrame::Raised,
    00096         Sunken = QFrame::Sunken
    00097     };
    00098
    00100     enum ScaleOptions
    00101     {
    00102         ScaleBackbone = 1,
    00103         ScaleTicks = 2,
    00104         ScaleLabel = 4
    00105     };
    00106
    00112     enum Mode
    00113     {
    00114         RotateNeedle,
    00115         RotateScale
    00116     };
    00117
    00118     explicit QwtDial( QWidget *parent = NULL);
    00119 #if QT_VERSION < 0x040000
    00120     explicit QwtDial( QWidget *parent, const char *name);
    00121 #endif
    00122
    00123     virtual ~QwtDial();
    00124
    00125     void setFrameShadow(Shadow);
    00126     Shadow frameShadow() const;
    00127
    00128     bool hasVisibleBackground() const;
    00129     void showBackground(bool);
    00130
    00131     void setLineWidth(int);
    00132     int lineWidth() const;
    00133
    00134     void setMode(Mode);
    00135     Mode mode() const;
    00136
    00137     virtual void setWrapping(bool);
    00138     bool wrapping() const;
    00139
    00140     virtual void setScale(int maxMajIntv, int maxMinIntv, double step = 0.0);
    00141
    00142     void setScaleArc(double min, double max);
    00143     void setScaleOptions(int);
    00144     void setScaleTicks(int minLen, int medLen, int majLen, int penWidth = 1);
    00145
    00146     double minScaleArc() const;
    00147     double maxScaleArc() const;
    00148
    00149     virtual void setOrigin(double);
    00150     double origin() const;
    00151
    00152     virtual void setNeedle(QwtDialNeedle *);
    00153     const QwtDialNeedle *needle() const;
    00154     QwtDialNeedle *needle();
    00155
    00156     QRect boundingRect() const;
    00157     QRect contentsRect() const;
    00158     virtual QRect scaleContentsRect() const;
    00159
    00160     virtual QSize sizeHint() const;
    00161     virtual QSize minimumSizeHint() const;
    00162
    00163     virtual void setScaleDraw(QwtDialScaleDraw *);
    00164
    00165     QwtDialScaleDraw *scaleDraw();
    00166     const QwtDialScaleDraw *scaleDraw() const;
    00167
    00168 protected:
    00169     virtual void paintEvent(QPaintEvent *);
    00170     virtual void resizeEvent(QResizeEvent *);
    00171     virtual void keyPressEvent(QKeyEvent *);
    00172
    00173     virtual void updateMask();
    00174
    00175     virtual void drawFrame(QPainter *p);
    00176     virtual void drawContents(QPainter *) const;
    00177     virtual void drawFocusIndicator(QPainter *) const;
    00178
    00179     virtual void drawScale(QPainter *, const QPoint &center,
    00180         int radius, double origin, double arcMin, double arcMax) const;
    00181
    00191     virtual void drawScaleContents(QPainter *painter, const QPoint &center,
    00192         int radius) const;
    00193
    00194     virtual void drawNeedle(QPainter *, const QPoint &,
    00195         int radius, double direction, QPalette::ColorGroup) const;
    00196
    00197     virtual QwtText scaleLabel(double) const;
    00198     void updateScale();
    00199
    00200     virtual void rangeChange();
    00201     virtual void valueChange();
    00202
    00203     virtual double getValue(const QPoint &);
    00204     virtual void getScrollMode(const QPoint &,
    00205         int &scrollMode, int &direction);
    00206
    00207 private:
    00208     void initDial();
    00209
    00210     class PrivateData;
    00211     PrivateData *d_data;
    00212 };
    00213
    00214 #endif