Qwt User's Guide: qwt_plot.h Source File

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# qwt_plot.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 #ifndef QWT_PLOT_H
    00011 #define QWT_PLOT_H
    00012
    00013 #include <qframe.h>
    00014 #include "qwt_global.h"
    00015 #include "qwt_array.h"
    00016 #include "qwt_text.h"
    00017 #include "qwt_plot_dict.h"
    00018 #include "qwt_scale_map.h"
    00019 #include "qwt_plot_printfilter.h"
    00020
    00021 class QwtPlotLayout;
    00022 class QwtLegend;
    00023 class QwtScaleWidget;
    00024 class QwtScaleEngine;
    00025 class QwtScaleDiv;
    00026 class QwtScaleDraw;
    00027 class QwtTextLabel;
    00028 class QwtPlotCanvas;
    00029 class QwtPlotPrintFilter;
    00030
    00077 class QWT_EXPORT QwtPlot: public QFrame, public QwtPlotDict
    00078 {
    00079     friend class QwtPlotCanvas;
    00080
    00081     Q_OBJECT
    00082     Q_PROPERTY( QString propertiesDocument
    00083         READ grabProperties WRITE applyProperties )
    00084
    00085 public:
    00087     enum Axis
    00088     {
    00089         yLeft,
    00090         yRight,
    00091         xBottom,
    00092         xTop,
    00093
    00094         axisCnt
    00095     };
    00096
    00105     enum LegendPosition
    00106     {
    00107         LeftLegend,
    00108         RightLegend,
    00109         BottomLegend,
    00110         TopLegend,
    00111
    00112         ExternalLegend
    00113     };
    00114
    00115     explicit QwtPlot(QWidget * = NULL);
    00116     explicit QwtPlot(const QwtText &title, QWidget *p = NULL);
    00117 #if QT_VERSION < 0x040000
    00118     explicit QwtPlot(QWidget *, const char* name);
    00119 #endif
    00120
    00121     virtual ~QwtPlot();
    00122
    00123     void applyProperties(const QString &);
    00124     QString grabProperties() const;
    00125
    00126     void setAutoReplot(bool tf = true);
    00127     bool autoReplot() const;
    00128
    00129     void print(QPaintDevice &p,
    00130         const QwtPlotPrintFilter & = QwtPlotPrintFilter()) const;
    00131     virtual void print(QPainter *, const QRect &rect,
    00132         const QwtPlotPrintFilter & = QwtPlotPrintFilter()) const;
    00133
    00134     // Layout
    00135
    00136     QwtPlotLayout *plotLayout();
    00137     const QwtPlotLayout *plotLayout() const;
    00138
    00139     void setMargin(int margin);
    00140     int margin() const;
    00141
    00142     // Title
    00143
    00144     void setTitle(const QString &);
    00145     void setTitle(const QwtText &t);
    00146     QwtText title() const;
    00147
    00148     QwtTextLabel *titleLabel();
    00149     const QwtTextLabel *titleLabel() const;
    00150
    00151     // Canvas
    00152
    00153     QwtPlotCanvas *canvas();
    00154     const QwtPlotCanvas *canvas() const;
    00155
    00156     void setCanvasBackground (const QColor &c);
    00157     const QColor& canvasBackground() const;
    00158
    00159     void setCanvasLineWidth(int w);
    00160     int canvasLineWidth() const;
    00161
    00162     virtual QwtScaleMap canvasMap(int axisId) const;
    00163
    00164     double invTransform(int axisId, int pos) const;
    00165     int transform(int axisId, double value) const;
    00166
    00167     // Axes
    00168
    00169     QwtScaleEngine *axisScaleEngine(int axisId);
    00170     const QwtScaleEngine *axisScaleEngine(int axisId) const;
    00171     void setAxisScaleEngine(int axisId, QwtScaleEngine *);
    00172
    00173     void setAxisAutoScale(int axisId);
    00174     bool axisAutoScale(int axisId) const;
    00175
    00176     void enableAxis(int axisId, bool tf = true);
    00177     bool axisEnabled(int axisId) const;
    00178
    00179     void setAxisFont(int axisId, const QFont &f);
    00180     QFont axisFont(int axisId) const;
    00181
    00182     void setAxisScale(int axisId, double min, double max, double step = 0);
    00183     void setAxisScaleDiv(int axisId, const QwtScaleDiv &);
    00184     void setAxisScaleDraw(int axisId, QwtScaleDraw *);
    00185
    00186     double axisStepSize(int axisId) const;
    00187
    00188     const QwtScaleDiv *axisScaleDiv(int axisId) const;
    00189     QwtScaleDiv *axisScaleDiv(int axisId);
    00190
    00191     const QwtScaleDraw *axisScaleDraw(int axisId) const;
    00192     QwtScaleDraw *axisScaleDraw(int axisId);
    00193
    00194     const QwtScaleWidget *axisWidget(int axisId) const;
    00195     QwtScaleWidget *axisWidget(int axisId);
    00196
    00197 #if QT_VERSION < 0x040000
    00198     void setAxisLabelAlignment(int axisId, int);
    00199 #else
    00200     void setAxisLabelAlignment(int axisId, Qt::Alignment);
    00201 #endif
    00202     void setAxisLabelRotation(int axisId, double rotation);
    00203
    00204     void setAxisTitle(int axisId, const QString &);
    00205     void setAxisTitle(int axisId, const QwtText &);
    00206     QwtText axisTitle(int axisId) const;
    00207
    00208     void setAxisMaxMinor(int axisId, int maxMinor);
    00209     int axisMaxMajor(int axisId) const;
    00210     void setAxisMaxMajor(int axisId, int maxMajor);
    00211     int axisMaxMinor(int axisId) const;
    00212
    00213     // Legend
    00214
    00215     void insertLegend(QwtLegend *, LegendPosition = QwtPlot::RightLegend,
    00216         double ratio = -1.0);
    00217
    00218     QwtLegend *legend();
    00219     const QwtLegend *legend() const;
    00220
    00221     // Misc
    00222
    00223     virtual void polish();
    00224     virtual QSize sizeHint() const;
    00225     virtual QSize minimumSizeHint() const;
    00226
    00227     virtual void updateLayout();
    00228
    00229     virtual bool event(QEvent *);
    00230
    00231 signals:
    00242     void legendClicked(QwtPlotItem *plotItem);
    00243
    00256     void legendChecked(QwtPlotItem *plotItem, bool on);
    00257
    00258 public slots:
    00259     virtual void clear();
    00260
    00261     virtual void replot();
    00262     void autoRefresh();
    00263
    00264 protected slots:
    00265     virtual void legendItemClicked();
    00266     virtual void legendItemChecked(bool);
    00267
    00268 protected:
    00269     static bool axisValid(int axisId);
    00270
    00271     virtual void drawCanvas(QPainter *);
    00272     virtual void drawItems(QPainter *, const QRect &,
    00273         const QwtScaleMap maps[axisCnt],
    00274         const QwtPlotPrintFilter &) const;
    00275
    00276     virtual void updateTabOrder();
    00277
    00278     void updateAxes();
    00279
    00280     virtual void resizeEvent(QResizeEvent *e);
    00281
    00282     virtual void printLegendItem(QPainter *,
    00283         const QWidget *, const QRect &) const;
    00284
    00285     virtual void printTitle(QPainter *, const QRect &) const;
    00286
    00287     virtual void printScale(QPainter *, int axisId, int startDist, int endDist,
    00288         int baseDist, const QRect &) const;
    00289
    00290     virtual void printCanvas(QPainter *,
    00291         const QRect &boundingRect, const QRect &canvasRect,
    00292         const QwtScaleMap maps[axisCnt], const QwtPlotPrintFilter &) const;
    00293
    00294     virtual void printLegend(QPainter *, const QRect &) const;
    00295
    00296 private:
    00297     void initAxesData();
    00298     void deleteAxesData();
    00299     void updateScaleDiv();
    00300
    00301     void initPlot(const QwtText &title);
    00302
    00303     class AxisData;
    00304     AxisData *d_axisData[axisCnt];
    00305
    00306     class PrivateData;
    00307     PrivateData *d_data;
    00308 };
    00309
    00310 #endif