# QPrintEngine Class Reference
## [[QtGui](index.htm) module]
该QPrintEngine类定义一个接口，用于如何[QPrinter](qprinter.html)交互与给定的打印子系统。[More...](#details)
### Types
* `enum PrintEnginePropertyKey { PPK_CollateCopies, PPK_ColorMode, PPK_Creator, PPK_DocumentName, ..., PPK_CustomBase }`
### Methods
* `__init__ (self)`
* `__init__ (self, QPrintEngine)`
* `bool abort (self)`
* `int metric (self, QPaintDevice.PaintDeviceMetric)`
* `bool newPage (self)`
* `QPrinter.PrinterState printerState (self)`
* `QVariant property (self, PrintEnginePropertyKey key)`
* `setProperty (self, PrintEnginePropertyKey key, QVariant value)`
* * *
## Detailed Description
该QPrintEngine类定义一个接口，用于如何[QPrinter](qprinter.html)交互与给定的打印子系统。
创建您自己的打印引擎时常见的情况是从两个派生[QPaintEngine](qpaintengine.html)和QPrintEngine 。打印引擎的各种性质都给予[property](qprintengine.html#property)（ ），并设置用[setProperty](qprintengine.html#setProperty)（ ） 。
* * *
## Type Documentation
```
QPrintEngine.PrintEnginePropertyKey
```
该枚举用于打印引擎之间的通信性能和[QPrinter](qprinter.html)。一个属性可能会或可能不会被给定的打印引擎的支持。
| Constant | Value | Description |
| --- | --- | --- |
| `QPrintEngine.PPK_CollateCopies` | `0` | 一个布尔值，表示打印输出是否应该整理与否。 |
| `QPrintEngine.PPK_ColorMode` | `1` | 指[QPrinter.ColorMode](qprinter.html#ColorMode-enum)，无论是彩色还是黑白。 |
| `QPrintEngine.PPK_Creator` | `2` | 一个字符串，描述了文档的创建者。 |
| `QPrintEngine.PPK_Duplex` | `21` | 一个布尔值，指示是否应该用于打印输出的打印机纸张的两面。 |
| `QPrintEngine.PPK_DocumentName` | `3` | 一个字符串，描述在后台打印程序的文件名。 |
| `QPrintEngine.PPK_FontEmbedding` | `19` | 一个布尔值，表示该文档的字体数据是否应该被嵌入在发送到打印机的数据。 |
| `QPrintEngine.PPK_FullPage` | `4` | 一个布尔值，说明如果打印机应该是整页或没有。 |
| `QPrintEngine.PPK_NumberOfCopies` | `5` | 已过时。一个整数，指定打印份数。使用PPK_CopyCount代替。 |
| `QPrintEngine.PPK_Orientation` | `6` | 指定[QPrinter.Orientation](qprinter.html#Orientation-enum)值。 |
| `QPrintEngine.PPK_OutputFileName` | `7` | 输出文件名作为一个字符串。一个空的文件名表示打印机不能打印到文件。 |
| `QPrintEngine.PPK_PageOrder` | `8` | 指定[QPrinter.PageOrder](qprinter.html#PageOrder-enum)值。 |
| `QPrintEngine.PPK_PageRect` | `9` | A [QRect](qrect.html)指定页面的矩形 |
| `QPrintEngine.PPK_PageSize` | `10` | 已过时。使用PPK_PaperSize代替。 |
| `QPrintEngine.PPK_PaperRect` | `11` | A [QRect](qrect.html)指定纸张的矩形。 |
| `QPrintEngine.PPK_PaperSource` | `12` | 指定[QPrinter.PaperSource](qprinter.html#PaperSource-enum)值。 |
| `QPrintEngine.PPK_PaperSources` | `22` | 指定多于一个[QPrinter.PaperSource](qprinter.html#PaperSource-enum)值。 |
| `QPrintEngine.PPK_PaperSize` | `PPK_PageSize` | 指定[QPrinter.PaperSize](qprinter.html#PaperSize-enum)值。 |
| `QPrintEngine.PPK_PrinterName` | `13` | 一个字符串，指定打印机的名称。 |
| `QPrintEngine.PPK_PrinterProgram` | `14` | 一个字符串，指定用于打印的打印机程序的名称， |
| `QPrintEngine.PPK_Resolution` | `15` | 一个整数描述每英寸点数为这台打印机。 |
| `QPrintEngine.PPK_SelectionOption` | `16` | |
| `QPrintEngine.PPK_SupportedResolutions` | `17` | 整数列表[QVariants](index.htm#qvariants)描述一组打印机有支持的分辨率。 |
| `QPrintEngine.PPK_SuppressSystemPrintStatus` | `20` | 打压展示印刷进步的内置对话框。由于4.1本只有在Mac OS X，其中，在默认情况下，会显示一个状态对话框的效果。 |
| `QPrintEngine.PPK_WindowsPageSize` | `18` | 一个整数，指定在Windows上DM_PAPER条目。 |
| `QPrintEngine.PPK_CustomPaperSize` | `23` | A [QSizeF](qsizef.html)在指定自定义纸张尺寸[QPrinter.Point](qprinter.html#Unit-enum)单元。 |
| `QPrintEngine.PPK_PageMargins` | `24` | A [QList](index.htm)\u003c[QVariant](qvariant.html)\u003e包含左，上，右，下边距值。 |
| `QPrintEngine.PPK_CopyCount` | `25` | 一个整数，指定要打印的副本数。 |
| `QPrintEngine.PPK_SupportsMultipleCopies` | `26` | 一个布尔值，表示打印机是否支持打印多份在一个作业。 |
| `QPrintEngine.PPK_CustomBase` | `0xff00` | 为扩展的基础。 |
* * *
## Method Documentation
```
QPrintEngine.__init__ (self)
```
```
QPrintEngine.__init__ (self, QPrintEngine)
```
```
bool QPrintEngine.abort (self)
```
这种方法是抽象的，应在任何子类中重新实现。
指示打印引擎，中止打印处理。成功返回True ，否则返回False 。
```
int QPrintEngine.metric (self, QPaintDevice.PaintDeviceMetric)
```
这种方法是抽象的，应在任何子类中重新实现。
返回度量给定的_id_。
```
bool QPrintEngine.newPage (self)
```
这种方法是抽象的，应在任何子类中重新实现。
指示打印引擎启动一个新的页面。返回True如果打印机能够创建新的页面，否则返回False 。
```
QPrinter.PrinterState QPrintEngine.printerState (self)
```
[
这种方法是抽象的，应在任何子类中重新实现。
返回正在使用的打印引擎的打印机的当前状态。
```
QVariant QPrintEngine.property (self, PrintEnginePropertyKey key)
```
这种方法是抽象的，应在任何子类中重新实现。
返回由指定的打印引擎的财产_key_。
](qprinter.html#PrinterState-enum)
[**See also**](qprinter.html#PrinterState-enum) [setProperty](qprintengine.html#setProperty)（ ） 。
```
QPrintEngine.setProperty (self, PrintEnginePropertyKey key, QVariant value)
```
这种方法是抽象的，应在任何子类中重新实现。
设置由指定的打印引擎的财产_key_为给定的_value_。
**See also** [property](qprintengine.html#property)（ ） 。
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- QValidator Class Reference
- QVariant Class Reference
- QVariantAnimation Class Reference
- QVBoxLayout Class Reference
- QVector2D Class Reference
- QVector3D Class Reference
- QVector4D Class Reference
- QVideoFrame Class Reference
- QVideoSurfaceFormat Class Reference
- QWaitCondition Class Reference
- QWebDatabase Class Reference
- QWebElement Class Reference
- QWebElementCollection Class Reference
- QWebFrame Class Reference
- QWebHistory Class Reference
- QWebHistoryInterface Class Reference
- QWebHistoryItem Class Reference
- QWebHitTestResult Class Reference
- QWebInspector Class Reference
- QWebPage Class Reference
- QWebPluginFactory Class Reference
- QWebSecurityOrigin Class Reference
- QWebSettings Class Reference
- QWebView Class Reference
- QWhatsThis Class Reference
- QWhatsThisClickedEvent Class Reference
- QWheelEvent Class Reference
- QWidget Class Reference
- QWidgetAction Class Reference
- QWidgetItem Class Reference
- QWindowStateChangeEvent Class Reference
- QWizard Class Reference
- QWizardPage Class Reference
- QWorkspace Class Reference
- QWriteLocker Class Reference
- QX11EmbedContainer Class Reference
- QX11EmbedWidget Class Reference
- QX11Info Class Reference
- QXmlAttributes Class Reference
- QXmlContentHandler Class Reference
- QXmlDeclHandler Class Reference
- QXmlDefaultHandler Class Reference
- QXmlDTDHandler Class Reference
- QXmlEntityResolver Class Reference
- QXmlErrorHandler Class Reference
- QXmlFormatter Class Reference
- QXmlInputSource Class Reference
- QXmlItem Class Reference
- QXmlLexicalHandler Class Reference
- QXmlLocator Class Reference
- QXmlName Class Reference
- QXmlNamePool Class Reference
- QXmlNamespaceSupport Class Reference
- QXmlNodeModelIndex Class Reference
- QXmlParseException Class Reference
- QXmlQuery Class Reference
- QXmlReader Class Reference
- QXmlResultItems Class Reference
- QXmlSchema Class Reference
- QXmlSchemaValidator Class Reference
- QXmlSerializer Class Reference
- QXmlSimpleReader Class Reference
- QXmlStreamAttribute Class Reference
- QXmlStreamAttributes Class Reference
- QXmlStreamEntityDeclaration Class Reference
- QXmlStreamEntityResolver Class Reference
- QXmlStreamNamespaceDeclaration Class Reference
- QXmlStreamNotationDeclaration Class Reference
- QXmlStreamReader Class Reference
- QXmlStreamWriter Class Reference