QPrintEngine Class

The QPrintEngine class defines an interface for how QPrinter interacts with a given printing subsystem. More...

Header: #include <QPrintEngine>
qmake: QT += printsupport

Note: All functions in this class are reentrant.

Public Types

enum PrintEnginePropertyKey { PPK_CollateCopies, PPK_ColorMode, PPK_Creator, PPK_Duplex, ..., PPK_CustomBase }

Public Functions

virtual ~QPrintEngine()
virtual bool abort() = 0
virtual int metric(QPaintDevice::PaintDeviceMetric id) const = 0
virtual bool newPage() = 0
virtual QPrinter::PrinterState printerState() const = 0
virtual QVariant property(QPrintEngine::PrintEnginePropertyKey key) const = 0
virtual void setProperty(QPrintEngine::PrintEnginePropertyKey key, const QVariant &value) = 0

Detailed Description

The QPrintEngine class defines an interface for how QPrinter interacts with a given printing subsystem.

The common case when creating your own print engine is to derive from both QPaintEngine and QPrintEngine. Various properties of a print engine are given with property() and set with setProperty().

See also QPaintEngine.

Member Type Documentation

enum QPrintEngine::PrintEnginePropertyKey

This enum is used to communicate properties between the print engine and QPrinter. A property may or may not be supported by a given print engine.

ConstantValueDescription
QPrintEngine::PPK_CollateCopies0A boolean value indicating whether the printout should be collated or not.
QPrintEngine::PPK_ColorMode1Refers to QPrinter::ColorMode, either color or monochrome.
QPrintEngine::PPK_Creator2A string describing the document's creator.
QPrintEngine::PPK_Duplex20A boolean value indicating whether both sides of the printer paper should be used for the printout.
QPrintEngine::PPK_DocumentName3A string describing the document name in the spooler.
QPrintEngine::PPK_FontEmbedding19A boolean value indicating whether data for the document's fonts should be embedded in the data sent to the printer.
QPrintEngine::PPK_FullPage4A boolean describing if the printer should be full page or not.
QPrintEngine::PPK_NumberOfCopies5Obsolete. An integer specifying the number of copies. Use PPK_CopyCount instead.
QPrintEngine::PPK_Orientation6Specifies a QPrinter::Orientation value.
QPrintEngine::PPK_OutputFileName7The output file name as a string. An empty file name indicates that the printer should not print to a file.
QPrintEngine::PPK_PageOrder8Specifies a QPrinter::PageOrder value.
QPrintEngine::PPK_PageRect9A QRect specifying the page rectangle
QPrintEngine::PPK_PageSize10Obsolete. Use PPK_PaperSize instead.
QPrintEngine::PPK_PaperRect11A QRect specifying the paper rectangle.
QPrintEngine::PPK_PaperSource12Specifies a QPrinter::PaperSource value.
QPrintEngine::PPK_PaperSources21Specifies more than one QPrinter::PaperSource value.
QPrintEngine::PPK_PaperName26A string specifying the name of the paper.
QPrintEngine::PPK_PaperSizePPK_PageSizeSpecifies a QPrinter::PaperSize value.
QPrintEngine::PPK_PrinterName13A string specifying the name of the printer.
QPrintEngine::PPK_PrinterProgram14A string specifying the name of the printer program used for printing,
QPrintEngine::PPK_Resolution15An integer describing the dots per inch for this printer.
QPrintEngine::PPK_SelectionOption16 
QPrintEngine::PPK_SupportedResolutions17A list of integer QVariants describing the set of supported resolutions that the printer has.
QPrintEngine::PPK_WindowsPageSize18An integer specifying a DM_PAPER entry on Windows.
QPrintEngine::PPK_CustomPaperSize22A QSizeF specifying a custom paper size in the QPrinter::Point unit.
QPrintEngine::PPK_PageMargins23A QList<QVariant> containing the left, top, right and bottom margin values in the QPrinter::Point unit.
QPrintEngine::PPK_CopyCount24An integer specifying the number of copies to print.
QPrintEngine::PPK_SupportsMultipleCopies25A boolean value indicating whether or not the printer supports printing multiple copies in one job.
QPrintEngine::PPK_QPageSize27Set the page size using a QPageSize object.
QPrintEngine::PPK_QPageMargins28Set the page margins using a QPair of QMarginsF and QPageLayout::Unit.
QPrintEngine::PPK_QPageLayout29Set the page layout using a QPageLayout object.
QPrintEngine::PPK_CustomBase0xff00Basis for extension.

Member Function Documentation

[virtual] QPrintEngine::~QPrintEngine()

Destroys the print engine.

[pure virtual] bool QPrintEngine::abort()

Instructs the print engine to abort the printing process. Returns true if successful; otherwise returns false.

[pure virtual] int QPrintEngine::metric(QPaintDevice::PaintDeviceMetric id) const

Returns the metric for the given id.

[pure virtual] bool QPrintEngine::newPage()

Instructs the print engine to start a new page. Returns true if the printer was able to create the new page; otherwise returns false.

[pure virtual] QPrinter::PrinterState QPrintEngine::printerState() const

Returns the current state of the printer being used by the print engine.

[pure virtual] QVariant QPrintEngine::property(QPrintEngine::PrintEnginePropertyKey key) const

Returns the print engine's property specified by key.

See also setProperty().

[pure virtual] void QPrintEngine::setProperty(QPrintEngine::PrintEnginePropertyKey key, const QVariant &value)

Sets the print engine's property specified by key to the given value.

See also property().

© 2018 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.