qwt_plot_abstract_canvas.h

/******************************************************************************
 * 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 canvasBorderPath( const QRect& rect ) const;
    void updateStyleSheetInfo();
 
  private:
    Q_DISABLE_COPY(QwtPlotAbstractCanvas)
 
    class PrivateData;
    PrivateData* m_data;
};
 
class QWT_EXPORT QwtPlotAbstractGLCanvas : public QwtPlotAbstractCanvas
{
  public:
    enum PaintAttribute
    {
        BackingStore = 1,
 
        ImmediatePaint = 8,
    };
 
    Q_DECLARE_FLAGS( PaintAttributes, PaintAttribute )
 
    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* m_data;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotAbstractGLCanvas::PaintAttributes )
 
#endif