---
name: "QwtPlotPrintFilter"
section: "3"
platform: "linux"
package: "libqwt5-doc"
version: "5.2.3-1"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/QwtPlotPrintFilter"
---

# QwtPlotPrintFilter(3)

## NAME

QwtPlotPrintFilter -

## SYNOPSIS

`#include <qwt_plot_printfilter.h>`

### Public Types

enum **Item** { **Title**, **Legend**, **Curve**, **CurveSymbol**, **Marker**, **MarkerSymbol**, **MajorGrid**, **MinorGrid**, **CanvasBackground**, **AxisScale**, **AxisTitle**, **WidgetBackground** }\
 enum **Options** { **PrintMargin** =  1, **PrintTitle** =  2, **PrintLegend** =  4, **PrintGrid** =  8, **PrintBackground** =  16, **PrintFrameWithScales** =  32, **PrintAll** =  ~PrintFrameWithScales }\

### Public Member Functions

**QwtPlotPrintFilter** ()\
 virtual **~QwtPlotPrintFilter** ()\
 virtual void **apply** (**QwtPlot** \*) const \
 virtual void **apply** (**QwtPlotItem** \*) const \
 virtual QColor **color** (const QColor &, **Item** item) const \
 virtual QFont **font** (const QFont &, **Item** item) const \
 int **options** () const \
 virtual void **reset** (**QwtPlot** \*) const \
 virtual void **reset** (**QwtPlotItem** \*) const \
 void **setOptions** (int **options**)\

## 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 So this concept is outdated and **QwtPlotPrintFilter** will be removed/replaced in Qwt 6.x.

## Constructor & Destructor Documentation

### QwtPlotPrintFilter::QwtPlotPrintFilter ()` [explicit]`

Sets filter options to PrintAll

## Member Function Documentation

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

Change color and fonts of a plot

**See also:**

**apply()**

### QColor QwtPlotPrintFilter::color (const QColor &c, Itemitem) 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.

### QFont QwtPlotPrintFilter::font (const QFont &f, Itemitem) 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

### int QwtPlotPrintFilter::options () const

Get plot print options. **See also:**

**setOptions()**

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

Reset color and fonts of a plot

**See also:**

**apply()**

### void QwtPlotPrintFilter::setOptions (intoptions)

Set plot print options. **Parameters:**

*options* Or'd **QwtPlotPrintFilter::Options** values

**See also:**

**options()**

## Author

Generated automatically by Doxygen for Qwt User's Guide from the source code.