A base class for plot print filters. More...

#include <qwt_plot_printfilter.h>

Collaboration diagram for QwtPlotPrintFilter:

Classes
class	PrivateData
Public Types
enum	Options { PrintMargin = 1, PrintTitle = 2, PrintLegend = 4, PrintGrid = 8, PrintBackground = 16, PrintFrameWithScales = 32, PrintAll = ~PrintFrameWithScales }
	Print options. More...
enum	Item { Title, Legend, Curve, CurveSymbol, Marker, MarkerSymbol, MajorGrid, MinorGrid, CanvasBackground, AxisScale, AxisTitle, WidgetBackground }
	Print items. More...
Public Member Functions
	QwtPlotPrintFilter ()
virtual	~QwtPlotPrintFilter ()
	Destructor.
virtual QColor	color (const QColor &, Item item) const
	Modifies a color for printing.
virtual QFont	font (const QFont &, Item item) const
	Modifies a font for printing.
void	setOptions (int options)
	Set plot print options.
int	options () const
	Get plot print options.
virtual void	apply (QwtPlot *) const
virtual void	reset (QwtPlot *) const
virtual void	apply (QwtPlotItem *) const
virtual void	reset (QwtPlotItem *) const

Detailed Description

A base class for plot print filters.

A print filter can be used to customize QwtPlot::print().

Deprecated:: In Qwt 5.0 the design of QwtPlot allows/recommends writing individual QwtPlotItems, that are not known to QwtPlotPrintFilter. So this concept is outdated and QwtPlotPrintFilter will be removed/replaced in Qwt 6.x.

Definition at line 30 of file qwt_plot_printfilter.h.

Member Enumeration Documentation

enum QwtPlotPrintFilter::Item

Print items.

Enumerator:

Title
Legend
Curve
CurveSymbol
Marker
MarkerSymbol
MajorGrid
MinorGrid
CanvasBackground
AxisScale
AxisTitle
WidgetBackground

Definition at line 47 of file qwt_plot_printfilter.h.

    {
        Title,
        Legend,
        Curve,
        CurveSymbol,
        Marker,
        MarkerSymbol,
        MajorGrid,
        MinorGrid,
        CanvasBackground,
        AxisScale,
        AxisTitle,
        WidgetBackground
    };

enum QwtPlotPrintFilter::Options

Print options.

Enumerator:

PrintMargin
PrintTitle
PrintLegend
PrintGrid
PrintBackground
PrintFrameWithScales
PrintAll

Definition at line 34 of file qwt_plot_printfilter.h.

    {
        PrintMargin = 1,
        PrintTitle = 2,
        PrintLegend = 4,
        PrintGrid = 8,
        PrintBackground = 16,
        PrintFrameWithScales = 32,

        PrintAll = ~PrintFrameWithScales
    };

Constructor & Destructor Documentation

QwtPlotPrintFilter::QwtPlotPrintFilter ( ) [explicit]

Sets filter options to PrintAll

Definition at line 82 of file qwt_plot_printfilter.cpp.

{
    d_data = new PrivateData;
}

QwtPlotPrintFilter::~QwtPlotPrintFilter ( ) [virtual]

Destructor.

Definition at line 88 of file qwt_plot_printfilter.cpp.

{
    delete d_data;
}

Member Function Documentation

void QwtPlotPrintFilter::apply ( QwtPlot * plot ) const [virtual]

Change color and fonts of a plot

See also:: apply()

Definition at line 157 of file qwt_plot_printfilter.cpp.

Referenced by QwtPlot::print().

{
    const bool doAutoReplot = plot->autoReplot();
    plot->setAutoReplot(false);

    delete d_data->cache;
    d_data->cache = new PrivateData::Cache;

    PrivateData::Cache &cache = *d_data->cache;

    if ( plot->titleLabel() )
    {
        QPalette palette = plot->titleLabel()->palette();
        cache.titleColor = palette.color(
            QPalette::Active, Palette::Text);
        palette.setColor(QPalette::Active, Palette::Text,
                         color(cache.titleColor, Title));
        plot->titleLabel()->setPalette(palette);

        cache.titleFont = plot->titleLabel()->font();
        plot->titleLabel()->setFont(font(cache.titleFont, Title));
    }
    if ( plot->legend() )
    {
#if QT_VERSION < 0x040000
        QValueList<QWidget *> list = plot->legend()->legendItems();
        for ( QValueListIterator<QWidget *> it = list.begin();
            it != list.end(); ++it )
#else
        QList<QWidget *> list = plot->legend()->legendItems();
        for ( QList<QWidget*>::iterator it = list.begin();
            it != list.end(); ++it )
#endif
        {
            QWidget *w = *it;

            cache.legendFonts.insert(w, w->font());
            w->setFont(font(w->font(), Legend));

            if ( w->inherits("QwtLegendItem") )
            {
                QwtLegendItem *label = (QwtLegendItem *)w;

                QwtSymbol symbol = label->symbol();
                QPen pen = symbol.pen();
                QBrush brush = symbol.brush();

                pen.setColor(color(pen.color(), CurveSymbol));
                brush.setColor(color(brush.color(), CurveSymbol));

                symbol.setPen(pen);
                symbol.setBrush(brush);
                label->setSymbol(symbol);

                pen = label->curvePen();
                pen.setColor(color(pen.color(), Curve));
                label->setCurvePen(pen);
            }
        }
    }
    for ( int axis = 0; axis < QwtPlot::axisCnt; axis++ )
    {
        QwtScaleWidget *scaleWidget = plot->axisWidget(axis);
        if ( scaleWidget )
        {
            cache.scaleColor[axis] = scaleWidget->palette().color(
                QPalette::Active, Palette::Foreground);
            QPalette palette = scaleWidget->palette();
            palette.setColor(QPalette::Active, Palette::Foreground,
                             color(cache.scaleColor[axis], AxisScale));
            scaleWidget->setPalette(palette);

            cache.scaleFont[axis] = scaleWidget->font();
            scaleWidget->setFont(font(cache.scaleFont[axis], AxisScale));

            cache.scaleTitle[axis] = scaleWidget->title();

            QwtText scaleTitle = scaleWidget->title();
            if ( scaleTitle.testPaintAttribute(QwtText::PaintUsingTextColor) )
            {
                cache.scaleTitleColor[axis] = scaleTitle.color();
                scaleTitle.setColor(
                    color(cache.scaleTitleColor[axis], AxisTitle));
            }

            if ( scaleTitle.testPaintAttribute(QwtText::PaintUsingTextFont) )
            {
                cache.scaleTitleFont[axis] = scaleTitle.font();
                scaleTitle.setFont(
                    font(cache.scaleTitleFont[axis], AxisTitle));
            }

            scaleWidget->setTitle(scaleTitle);

            int startDist, endDist;
            scaleWidget->getBorderDistHint(startDist, endDist);
            scaleWidget->setBorderDist(startDist, endDist);
        }
    }


    QPalette p = plot->palette();
    cache.widgetBackground = plot->palette().color(
        QPalette::Active, Palette::Background);
    p.setColor(QPalette::Active, Palette::Background, 
        color(cache.widgetBackground, WidgetBackground));
    plot->setPalette(p);

    cache.canvasBackground = plot->canvasBackground();
    plot->setCanvasBackground(color(cache.canvasBackground, CanvasBackground));

    const QwtPlotItemList& itmList = plot->itemList();
    for ( QwtPlotItemIterator it = itmList.begin();
        it != itmList.end(); ++it )
    {
        apply(*it);
    }

    plot->setAutoReplot(doAutoReplot);
}

void QwtPlotPrintFilter::apply ( QwtPlotItem * item ) const [virtual]

Definition at line 278 of file qwt_plot_printfilter.cpp.

{
    PrivateData::Cache &cache = *d_data->cache;

    switch(item->rtti())
    {
        case QwtPlotItem::Rtti_PlotGrid:
        {
            QwtPlotGrid *grid = (QwtPlotGrid *)item;

            QPen pen = grid->majPen();
            cache.gridColors[0] = pen.color();
            pen.setColor(color(pen.color(), MajorGrid));
            grid->setMajPen(pen);

            pen = grid->minPen();
            cache.gridColors[1] = pen.color();
            pen.setColor(color(pen.color(), MinorGrid));
            grid->setMinPen(pen);

            break;
        }
        case QwtPlotItem::Rtti_PlotCurve:
        {
            QwtPlotCurve *c = (QwtPlotCurve *)item;

            QwtSymbol symbol = c->symbol();

            QPen pen = symbol.pen();
            cache.curveSymbolPenColors.insert(c, pen.color());
            pen.setColor(color(pen.color(), CurveSymbol));
            symbol.setPen(pen);

            QBrush brush = symbol.brush();
            cache.curveSymbolBrushColors.insert(c, brush.color());
            brush.setColor(color(brush.color(), CurveSymbol));
            symbol.setBrush(brush);

            c->setSymbol(symbol);

            pen = c->pen();
            cache.curveColors.insert(c, pen.color());
            pen.setColor(color(pen.color(), Curve));
            c->setPen(pen);

            break;
        }
        case QwtPlotItem::Rtti_PlotMarker:
        {
            QwtPlotMarker *m = (QwtPlotMarker *)item;

            QwtText label = m->label();
            cache.markerFonts.insert(m, label.font());
            label.setFont(font(label.font(), Marker));
            cache.markerLabelColors.insert(m, label.color());
            label.setColor(color(label.color(), Marker));
            m->setLabel(label);
            
            QPen pen = m->linePen();
            cache.markerLineColors.insert(m, pen.color());
            pen.setColor(color(pen.color(), Marker));
            m->setLinePen(pen);

            QwtSymbol symbol = m->symbol();

            pen = symbol.pen();
            cache.markerSymbolPenColors.insert(m, pen.color());
            pen.setColor(color(pen.color(), MarkerSymbol));
            symbol.setPen(pen);

            QBrush brush = symbol.brush();
            cache.markerSymbolBrushColors.insert(m, brush.color());
            brush.setColor(color(brush.color(), MarkerSymbol));
            symbol.setBrush(brush);

            m->setSymbol(symbol);

            break;
        }
        default:    
            break;
    }
}

QColor QwtPlotPrintFilter::color	(	const QColor &	c,
		Item	item
	)		const `[virtual]`

Modifies a color for printing.

Parameters:

c	Color to be modified
item	Type of item where the color belongs

Returns:: Modified color.

In case of !(QwtPlotPrintFilter::options() & PrintBackground) MajorGrid is modified to Qt::darkGray, MinorGrid to Qt::gray. All other colors are returned unmodified.

Definition at line 124 of file qwt_plot_printfilter.cpp.

References MajorGrid, MinorGrid, options(), and PrintBackground.

Referenced by apply().

{
    if ( !(options() & PrintBackground))
    {
        switch(item)
        {
            case MajorGrid:
                return Qt::darkGray;
            case MinorGrid:
                return Qt::gray;
            default:;
        }
    }
    return c;
}

QFont QwtPlotPrintFilter::font	(	const QFont &	f,
		Item	item
	)		const `[virtual]`

Modifies a font for printing.

Parameters:

f	Font to be modified
item	Type of item where the font belongs

All fonts are returned unmodified

Definition at line 148 of file qwt_plot_printfilter.cpp.

Referenced by apply().

{
    return f;
}

int QwtPlotPrintFilter::options ( ) const

Get plot print options.

See also:: setOptions()

Definition at line 108 of file qwt_plot_printfilter.cpp.

References QwtPlotPrintFilter::PrivateData::options.

Referenced by color(), QwtPlot::drawItems(), QwtPlot::print(), QwtPlot::printCanvas(), and setOptions().

{ 
    return d_data->options; 
}

void QwtPlotPrintFilter::reset ( QwtPlot * plot ) const [virtual]

Reset color and fonts of a plot

See also:: apply()

Definition at line 366 of file qwt_plot_printfilter.cpp.

Referenced by QwtPlot::print().

{
    if ( d_data->cache == 0 )
        return;

    const bool doAutoReplot = plot->autoReplot();
    plot->setAutoReplot(false);

    const PrivateData::Cache &cache = *d_data->cache;

    if ( plot->titleLabel() )
    {
        QwtTextLabel* title = plot->titleLabel();
        if ( title->text().testPaintAttribute(QwtText::PaintUsingTextFont) )
        {
            QwtText text = title->text();
            text.setColor(cache.titleColor);
            title->setText(text);
        }
        else
        {
            QPalette palette = title->palette();
            palette.setColor(
                QPalette::Active, Palette::Text, cache.titleColor);
            title->setPalette(palette);
        }

        if ( title->text().testPaintAttribute(QwtText::PaintUsingTextFont) )
        {
            QwtText text = title->text();
            text.setFont(cache.titleFont);
            title->setText(text);
        }
        else
        {
            title->setFont(cache.titleFont);
        }
    }

    if ( plot->legend() )
    {
#if QT_VERSION < 0x040000
        QValueList<QWidget *> list = plot->legend()->legendItems();
        for ( QValueListIterator<QWidget *> it = list.begin();
            it != list.end(); ++it )
#else
        QList<QWidget *> list = plot->legend()->legendItems();
        for ( QList<QWidget*>::iterator it = list.begin();
            it != list.end(); ++it )
#endif
        {
            QWidget *w = *it;

            if ( cache.legendFonts.contains(w) )
                w->setFont(cache.legendFonts[w]);

            if ( w->inherits("QwtLegendItem") )
            {
                QwtLegendItem *label = (QwtLegendItem *)w;
                const QwtPlotItem *plotItem = 
                    (const QwtPlotItem*)plot->legend()->find(label);

                QwtSymbol symbol = label->symbol();
                if ( cache.curveSymbolPenColors.contains(plotItem) )
                {
                    QPen pen = symbol.pen();
                    pen.setColor(cache.curveSymbolPenColors[plotItem]);
                    symbol.setPen(pen);
                }

                if ( cache.curveSymbolBrushColors.contains(plotItem) )
                {
                    QBrush brush = symbol.brush();
                    brush.setColor(cache.curveSymbolBrushColors[plotItem]);
                    symbol.setBrush(brush);
                }
                label->setSymbol(symbol);

                if ( cache.curveColors.contains(plotItem) )
                {
                    QPen pen = label->curvePen();
                    pen.setColor(cache.curveColors[plotItem]);
                    label->setCurvePen(pen);
                }
            }
        }
    }
    for ( int axis = 0; axis < QwtPlot::axisCnt; axis++ )
    {
        QwtScaleWidget *scaleWidget = plot->axisWidget(axis);
        if ( scaleWidget )
        {
            QPalette palette = scaleWidget->palette();
            palette.setColor(QPalette::Active, Palette::Foreground,
                             cache.scaleColor[axis]);
            scaleWidget->setPalette(palette);

            scaleWidget->setFont(cache.scaleFont[axis]);
            scaleWidget->setTitle(cache.scaleTitle[axis]);

            int startDist, endDist;
            scaleWidget->getBorderDistHint(startDist, endDist);
            scaleWidget->setBorderDist(startDist, endDist);
        }
    }

    QPalette p = plot->palette();
    p.setColor(QPalette::Active, Palette::Background, cache.widgetBackground);
    plot->setPalette(p);

    plot->setCanvasBackground(cache.canvasBackground);
   
    const QwtPlotItemList& itmList = plot->itemList();
    for ( QwtPlotItemIterator it = itmList.begin();
        it != itmList.end(); ++it )
    {
        reset(*it);
    }

    delete d_data->cache;
    d_data->cache = 0;

    plot->setAutoReplot(doAutoReplot);
}

void QwtPlotPrintFilter::reset ( QwtPlotItem * item ) const [virtual]

Definition at line 491 of file qwt_plot_printfilter.cpp.

{
    if ( d_data->cache == 0 )
        return;

    const PrivateData::Cache &cache = *d_data->cache;

    switch(item->rtti())
    {
        case QwtPlotItem::Rtti_PlotGrid:
        {
            QwtPlotGrid *grid = (QwtPlotGrid *)item;

            QPen pen = grid->majPen();
            pen.setColor(cache.gridColors[0]);
            grid->setMajPen(pen);

            pen = grid->minPen();
            pen.setColor(cache.gridColors[1]);
            grid->setMinPen(pen);

            break;
        }
        case QwtPlotItem::Rtti_PlotCurve:
        {
            QwtPlotCurve *c = (QwtPlotCurve *)item;

            QwtSymbol symbol = c->symbol();

            if ( cache.curveSymbolPenColors.contains(c) )
            {
                symbol.setPen(cache.curveSymbolPenColors[c]);
            }

            if ( cache.curveSymbolBrushColors.contains(c) )
            {
                QBrush brush = symbol.brush();
                brush.setColor(cache.curveSymbolBrushColors[c]);
                symbol.setBrush(brush);
            }
            c->setSymbol(symbol);

            if ( cache.curveColors.contains(c) )
            {
                QPen pen = c->pen();
                pen.setColor(cache.curveColors[c]);
                c->setPen(pen);
            }

            break;
        }
        case QwtPlotItem::Rtti_PlotMarker:
        {
            QwtPlotMarker *m = (QwtPlotMarker *)item;

            if ( cache.markerFonts.contains(m) )
            {
                QwtText label = m->label();
                label.setFont(cache.markerFonts[m]);
                m->setLabel(label);
            }

            if ( cache.markerLabelColors.contains(m) )
            {
                QwtText label = m->label();
                label.setColor(cache.markerLabelColors[m]);
                m->setLabel(label);
            }

            if ( cache.markerLineColors.contains(m) )
            {
                QPen pen = m->linePen();
                pen.setColor(cache.markerLineColors[m]);
                m->setLinePen(pen);
            }
            
            QwtSymbol symbol = m->symbol();

            if ( cache.markerSymbolPenColors.contains(m) )
            {
                QPen pen = symbol.pen();
                pen.setColor(cache.markerSymbolPenColors[m]);
                symbol.setPen(pen);
            }

            if ( cache.markerSymbolBrushColors.contains(m) )
            {
                QBrush brush = symbol.brush();
                brush.setColor(cache.markerSymbolBrushColors[m]);
                symbol.setBrush(brush);
            }

            m->setSymbol(symbol);

            break;
        }
        default:
            break;
    }
}

void QwtPlotPrintFilter::setOptions ( int options )

Set plot print options.

Parameters:

options Or'd QwtPlotPrintFilter::Options values

See also:: options()

Definition at line 99 of file qwt_plot_printfilter.cpp.

References options(), and QwtPlotPrintFilter::PrivateData::options.

{ 
    d_data->options = options; 
}

The documentation for this class was generated from the following files:

QwtPlotPrintFilter Class Reference

Classes

Public Types

Public Member Functions

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation