qwt_plot_abstract_canvas.h

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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#ifndef QWT_PLOT_ABSTRACT_CANVAS_H
#define QWT_PLOT_ABSTRACT_CANVAS_H

#include "qwt_global.h"
#include <qframe.h>

class QwtPlot;

class QWT_EXPORT QwtPlotAbstractCanvas
{
public:
    enum FocusIndicator
    {
        NoFocusIndicator,

        CanvasFocusIndicator,

        ItemFocusIndicator
    };

    explicit QwtPlotAbstractCanvas( QWidget *canvasWidget );
    virtual ~QwtPlotAbstractCanvas();

    QwtPlot *plot();
    const QwtPlot *plot() const;

    void setFocusIndicator( FocusIndicator );
    FocusIndicator focusIndicator() const;

    void setBorderRadius( double );
    double borderRadius() const;

protected:
    QWidget* canvasWidget();
    const QWidget* canvasWidget() const;

    virtual void drawFocusIndicator( QPainter * );
    virtual void drawBorder( QPainter * );
    virtual void drawBackground( QPainter * );

    void fillBackground( QPainter * );
    void drawCanvas( QPainter * );
    void drawStyled( QPainter *, bool );
    void drawUnstyled( QPainter * );

    QPainterPath borderPath2( const QRect &rect ) const;
    void updateStyleSheetInfo();

private:
    Q_DISABLE_COPY(QwtPlotAbstractCanvas)

    class PrivateData;
    PrivateData *d_data;
};

class QWT_EXPORT QwtPlotAbstractGLCanvas: public QwtPlotAbstractCanvas
{
public:
    enum PaintAttribute
    {
        BackingStore = 1,

        ImmediatePaint = 8,
    };

    typedef QFlags<PaintAttribute> PaintAttributes;

    explicit QwtPlotAbstractGLCanvas( QWidget *canvasWidget );
    virtual ~QwtPlotAbstractGLCanvas();

    void setPaintAttribute( PaintAttribute, bool on = true );
    bool testPaintAttribute( PaintAttribute ) const;

    void setFrameStyle( int style );
    int frameStyle() const;

    void setFrameShadow( QFrame::Shadow );
    QFrame::Shadow frameShadow() const;

    void setFrameShape( QFrame::Shape );
    QFrame::Shape frameShape() const;

    void setLineWidth( int );
    int lineWidth() const;

    void setMidLineWidth( int );
    int midLineWidth() const;

    int frameWidth() const;
    QRect frameRect() const;

    virtual void invalidateBackingStore() = 0;

protected:
    void replot();
    void draw( QPainter * );

private:
    virtual void clearBackingStore() = 0;

    class PrivateData;
    PrivateData *d_data;
};

Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotAbstractGLCanvas::PaintAttributes )

#endif