# QPrintPreviewWidget Class Reference
## [[QtGui](index.htm) module]
该QPrintPreviewWidget类提供了一个小工具可以预览页面布局打印输出。[More...](#details)
继承[QWidget](qwidget.html)。
### Types
* `enum ViewMode { SinglePageView, FacingPagesView, AllPagesView }`
* `enum ZoomMode { CustomZoom, FitToWidth, FitInView }`
### Methods
* `__init__ (self, QPrinter printer, QWidget parent = None, Qt.WindowFlags flags = 0)`
* `__init__ (self, QWidget parent = None, Qt.WindowFlags flags = 0)`
* `int currentPage (self)`
* `fitInView (self)`
* `fitToWidth (self)`
* `int numPages (self)`
* `QPrinter.Orientation orientation (self)`
* `int pageCount (self)`
* `print_ (self)`
* `setAllPagesViewMode (self)`
* `setCurrentPage (self, int pageNumber)`
* `setFacingPagesViewMode (self)`
* `setLandscapeOrientation (self)`
* `setOrientation (self, QPrinter.Orientation orientation)`
* `setPortraitOrientation (self)`
* `setSinglePageViewMode (self)`
* `setViewMode (self, ViewMode viewMode)`
* `setVisible (self, bool visible)`
* `setZoomFactor (self, float zoomFactor)`
* `setZoomMode (self, ZoomMode zoomMode)`
* `updatePreview (self)`
* `ViewMode viewMode (self)`
* `float zoomFactor (self)`
* `zoomIn (self, float factor = 1.1)`
* `ZoomMode zoomMode (self)`
* `zoomOut (self, float factor = 1.1)`
### Qt Signals
* `void paintRequested (QPrinter *)`
* `void previewChanged ()`
* * *
## Detailed Description
该QPrintPreviewWidget类提供了一个小工具可以预览页面布局打印输出。
[QPrintPreviewDialog](qprintpreviewdialog.html)使用QPrintPreviewWidget内部,并QPrintPreviewWidget的目的是使得有可能以嵌入的预览到其它部件。这也使得它能够围绕它一个不同的用户界面比默认设置有[QPrintPreviewDialog](qprintpreviewdialog.html)。
使用QPrintPreviewWidget很简单:
1. 创建QPrintPreviewWidget
通过传递一个现有的构造QPrintPreviewWidget要么[QPrinter](qprinter.html)对象,或者已QPrintPreviewWidget创建构建的默认[QPrinter](qprinter.html)反对你。
2. 连接[paintRequested](qprintpreviewwidget.html#paintRequested)()信号到一个槽。
当插件需要产生一组预览页面,一个[paintRequested](qprintpreviewwidget.html#paintRequested)()信号将被从部件射出。槽连接到这个信号,并绘制到[QPrinter](qprinter.html)通过在作为信号参数。通话[QPrinter.newPage](qprinter.html#newPage)() ,以在预览启动一个新的页面。
* * *
## Type Documentation
```
QPrintPreviewWidget.ViewMode
```
此枚举是用来描述在预览窗口小部件的视图模式。
| Constant | Value | Description |
| --- | --- | --- |
| `QPrintPreviewWidget.SinglePageView` | `0` | A模式,其中单页在预览中查看。 |
| `QPrintPreviewWidget.FacingPagesView` | `1` | 凡在预览中的对开页面被观看的模式。 |
| `QPrintPreviewWidget.AllPagesView` | `2` | 凡在预览所有页面中查看视图模式。 |
```
QPrintPreviewWidget.ZoomMode
```
该枚举用于描述在预览窗口小部件的缩放模式。
| Constant | Value | Description |
| --- | --- | --- |
| `QPrintPreviewWidget.CustomZoom` | `0` | 变焦被设置为自定义缩放值。 |
| `QPrintPreviewWidget.FitToWidth` | `1` | 这种模式下的当前页面适合于该视图的宽度。 |
| `QPrintPreviewWidget.FitInView` | `2` | 这种模式在当前页的视图内适合。 |
* * *
## Method Documentation
```
QPrintPreviewWidget.__init__ (self, QPrinter printer, QWidget parent = None, Qt.WindowFlags flags = 0)
```
该_parent_的说法,如果不是没有,原因_self_通过Qt的,而不是PyQt的拥有。
构造一个[QPrintPreviewWidget](qprintpreviewwidget.html)基于_printer_并与_parent_作为父控件。窗口部件标记_flags_到传递[QWidget](qwidget.html)构造函数。
**See also** [QWidget.setWindowFlags](qwidget.html#windowFlags-prop)( ) 。
```
QPrintPreviewWidget.__init__ (self, QWidget parent = None, Qt.WindowFlags flags = 0)
```
该_parent_的说法,如果不是没有,原因_self_通过Qt的,而不是PyQt的拥有。
这是一个重载函数。
这将导致[QPrintPreviewWidget](qprintpreviewwidget.html)创建构造内部,默认[QPrinter](qprinter.html)对象,该对象将被用于生成预览。
```
int QPrintPreviewWidget.currentPage (self)
```
返回当前浏览的页面的预览。
**See also** [setCurrentPage](qprintpreviewwidget.html#setCurrentPage)( ) 。
```
QPrintPreviewWidget.fitInView (self)
```
这种方法也是一个Qt槽与C + +的签名`void fitInView()`。
这是一个方便的功能,是与调用`setZoomMode(QPrintPreviewWidget.FitInView)`。
```
QPrintPreviewWidget.fitToWidth (self)
```
这种方法也是一个Qt槽与C + +的签名`void fitToWidth()`。
这是一个方便的功能,是与调用`setZoomMode(QPrintPreviewWidget.FitToWidth)`。
```
int QPrintPreviewWidget.numPages (self)
```
```
QPrinter.Orientation QPrintPreviewWidget.orientation (self)
```
[](qprinter.html#Orientation-enum)
[返回预览的当前方向。从该值是](qprinter.html#Orientation-enum)[QPrinter](qprinter.html)与预览相关联的对象。
**See also** [setOrientation](qprintpreviewwidget.html#setOrientation)( ) 。
```
int QPrintPreviewWidget.pageCount (self)
```
返回在预览的页数。
此功能被引入Qt的4.6 。
```
QPrintPreviewWidget.print_ (self)
```
这种方法也是一个Qt槽与C + +的签名`void print()`。
打印预览与预览相关联的打印机。
```
QPrintPreviewWidget.setAllPagesViewMode (self)
```
这种方法也是一个Qt槽与C + +的签名`void setAllPagesViewMode()`。
这是一个方便的功能,是与调用`setViewMode(QPrintPreviewWidget.AllPagesView)`。
```
QPrintPreviewWidget.setCurrentPage (self, int pageNumber)
```
这种方法也是一个Qt槽与C + +的签名`void setCurrentPage(int)`。
设置在预览当前页面。这将导致以跳到开头_page_。
**See also** [currentPage](qprintpreviewwidget.html#currentPage)( ) 。
```
QPrintPreviewWidget.setFacingPagesViewMode (self)
```
这种方法也是一个Qt槽与C + +的签名`void setFacingPagesViewMode()`。
这是一个方便的功能,是与调用`setViewMode(QPrintPreviewWidget.FacingPagesView)`。
```
QPrintPreviewWidget.setLandscapeOrientation (self)
```
这种方法也是一个Qt槽与C + +的签名`void setLandscapeOrientation()`。
这是一个方便的功能,是与调用`setOrientation(QPrinter.Landscape)`。
```
QPrintPreviewWidget.setOrientation (self, QPrinter.Orientation orientation)
```
这种方法也是一个Qt槽与C + +的签名`void setOrientation(QPrinter::Orientation)`。
设置当前的取向_orientation_。此值将在设置[QPrinter](qprinter.html)与预览相关联的对象。
**See also** [orientation](qprintpreviewwidget.html#orientation)( ) 。
```
QPrintPreviewWidget.setPortraitOrientation (self)
```
这种方法也是一个Qt槽与C + +的签名`void setPortraitOrientation()`。
这是一个方便的功能,是与调用`setOrientation(QPrinter.Portrait)`。
```
QPrintPreviewWidget.setSinglePageViewMode (self)
```
这种方法也是一个Qt槽与C + +的签名`void setSinglePageViewMode()`。
这是一个方便的功能,是与调用`setViewMode(QPrintPreviewWidget.SinglePageView)`。
```
QPrintPreviewWidget.setViewMode (self, ViewMode viewMode)
```
这种方法也是一个Qt槽与C + +的签名`void setViewMode(QPrintPreviewWidget::ViewMode)`。
设置视图模式_mode_。默认视图模式[SinglePageView](qprintpreviewwidget.html#ViewMode-enum)。
**See also** [viewMode](qprintpreviewwidget.html#viewMode)( ) 。
```
QPrintPreviewWidget.setVisible (self, bool visible)
```
这种方法也是一个Qt槽与C + +的签名`void setVisible(bool)`。
从重新实现[QWidget.setVisible](qwidget.html#visible-prop)( ) 。
```
QPrintPreviewWidget.setZoomFactor (self, float zoomFactor)
```
这种方法也是一个Qt槽与C + +的签名`void setZoomFactor(qreal)`。
设置视图的缩放因子_factor_。例如,值1.0表示缩放的观点,这大约是认为不会对纸张的尺寸。 0.5的值将减半视图的大小,而2.0的值将增加一倍视图的大小。
**See also** [zoomFactor](qprintpreviewwidget.html#zoomFactor)( ) 。
```
QPrintPreviewWidget.setZoomMode (self, ZoomMode zoomMode)
```
这种方法也是一个Qt槽与C + +的签名`void setZoomMode(QPrintPreviewWidget::ZoomMode)`。
设置缩放模式_zoomMode_。默认缩放模式[FitInView](qprintpreviewwidget.html#ZoomMode-enum)。
**See also** [zoomMode](qprintpreviewwidget.html#zoomMode)( )[viewMode](qprintpreviewwidget.html#viewMode)()和[setViewMode](qprintpreviewwidget.html#setViewMode)( ) 。
```
QPrintPreviewWidget.updatePreview (self)
```
这种方法也是一个Qt槽与C + +的签名`void updatePreview()`。
这个函数更新预览,这会导致[paintRequested](qprintpreviewwidget.html#paintRequested)()信号被发射。
```
ViewMode QPrintPreviewWidget.viewMode (self)
```
[](qprintpreviewwidget.html#ViewMode-enum)
[返回当前视图模式。默认视图模式](qprintpreviewwidget.html#ViewMode-enum)[SinglePageView](qprintpreviewwidget.html#ViewMode-enum)。
**See also** [setViewMode](qprintpreviewwidget.html#setViewMode)( ) 。
```
float QPrintPreviewWidget.zoomFactor (self)
```
返回视图的缩放因子。
**See also** [setZoomFactor](qprintpreviewwidget.html#setZoomFactor)( ) 。
```
QPrintPreviewWidget.zoomIn (self, float factor = 1.1)
```
这种方法也是一个Qt槽与C + +的签名`void zoomIn(qreal = 1.1)`。
缩放当前视图中所_factor_。为默认值_factor_是1.1 ,这意味着该视图将被缩小了10 % 。
```
ZoomMode QPrintPreviewWidget.zoomMode (self)
```
[
返回当前的缩放模式。
](qprintpreviewwidget.html#ZoomMode-enum)
[**See also**](qprintpreviewwidget.html#ZoomMode-enum) [setZoomMode](qprintpreviewwidget.html#setZoomMode)( )[viewMode](qprintpreviewwidget.html#viewMode)()和[setViewMode](qprintpreviewwidget.html#setViewMode)( ) 。
```
QPrintPreviewWidget.zoomOut (self, float factor = 1.1)
```
这种方法也是一个Qt槽与C + +的签名`void zoomOut(qreal = 1.1)`。
缩放当前视图由_factor_。为默认值_factor_是1.1 ,这意味着该视图将增加10 %,按比例缩小。
* * *
## Qt Signal Documentation
```
void paintRequested (QPrinter *)
```
这是该信号的默认超载。
当预览窗口小部件需要产生一组预览页面这个信号被发射。_printer_与此预览插件的打印机相关联。
```
void previewChanged ()
```
这是该信号的默认超载。
这个信号被发射时在预览窗口部件已经改变了一些内部状态,如取向。
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- QSql Class Reference
- QSqlDatabase Class Reference
- QSqlDriver Class Reference
- QSqlDriverCreatorBase Class Reference
- QSqlError Class Reference
- QSqlField Class Reference
- QSqlIndex Class Reference
- QSqlQuery Class Reference
- QSqlQueryModel Class Reference
- QSqlRecord Class Reference
- QSqlRelation Class Reference
- QSqlRelationalDelegate Class Reference
- QSqlRelationalTableModel Class Reference
- QSqlResult Class Reference
- QSqlTableModel Class Reference
- Qt4.7文档翻译:Qt样式单参考,Qt Style Sheets Reference
- QSsl Class Reference
- QSslCertificate Class Reference
- QSslCipher Class Reference
- QSslConfiguration Class Reference
- QSslError Class Reference
- QSslKey Class Reference
- QSslSocket Class Reference
- QStackedLayout Class Reference
- QStackedWidget Class Reference
- QStandardItem Class Reference
- QStandardItemModel Class Reference
- QState Class Reference
- QStateMachine Class Reference
- QStaticText Class Reference
- QStatusBar Class Reference
- QStatusTipEvent Class Reference
- QString Class Reference
- QStringList Class Reference
- QStringListModel Class Reference
- QStringMatcher Class Reference
- QStringRef Class Reference
- QStyle Class Reference
- QStyledItemDelegate Class Reference
- QStyleFactory Class Reference
- QStyleHintReturn Class Reference
- QStyleHintReturnMask Class Reference
- QStyleHintReturnVariant Class Reference
- QStyleOption Class Reference
- QStyleOptionButton Class Reference
- QStyleOptionComboBox Class Reference
- QStyleOptionComplex Class Reference
- QStyleOptionDockWidget Class Reference
- QStyleOptionDockWidgetV2 Class Reference
- QStyleOptionFocusRect Class Reference
- QStyleOptionFrame Class Reference
- QStyleOptionFrameV2 Class Reference
- QStyleOptionFrameV3 Class Reference
- QStyleOptionGraphicsItem Class Reference
- QStyleOptionGroupBox Class Reference
- QStyleOptionHeader Class Reference
- QStyleOptionMenuItem Class Reference
- QStyleOptionProgressBar Class Reference
- QStyleOptionProgressBarV2 Class Reference
- QStyleOptionRubberBand Class Reference
- QStyleOptionSizeGrip Class Reference
- QStyleOptionSlider Class Reference
- QStyleOptionSpinBox Class Reference
- QStyleOptionTab Class Reference
- QStyleOptionTabBarBase Class Reference
- QStyleOptionTabBarBaseV2 Class Reference
- QStyleOptionTabV2 Class Reference
- QStyleOptionTabV3 Class Reference
- QStyleOptionTabWidgetFrame Class Reference
- QStyleOptionTabWidgetFrameV2 Class Reference
- QStyleOptionTitleBar Class Reference
- QStyleOptionToolBar Class Reference
- QStyleOptionToolBox Class Reference
- QStyleOptionToolBoxV2 Class Reference
- QStyleOptionToolButton Class Reference
- QStyleOptionViewItem Class Reference
- QStyleOptionViewItemV2 Class Reference
- QStyleOptionViewItemV3 Class Reference
- QStyleOptionViewItemV4 Class Reference
- QStylePainter Class Reference
- QSvgGenerator Class Reference
- QSvgRenderer Class Reference
- QSvgWidget Class Reference
- QSwipeGesture Class Reference
- QSyntaxHighlighter Class Reference
- QSysInfo Class Reference
- QSystemLocale Class Reference
- QSystemSemaphore Class Reference
- QSystemTrayIcon Class Reference
- Qt Class Reference
- QTabBar Class Reference
- QTabletEvent Class Reference
- QTableView Class Reference
- QTableWidget Class Reference
- QTableWidgetItem Class Reference
- QTableWidgetSelectionRange Class Reference
- QTabWidget Class Reference
- QTapAndHoldGesture Class Reference
- QTapGesture Class Reference
- QTcpServer Class Reference
- QTcpSocket Class Reference
- QTemporaryFile Class Reference
- QTest Class Reference
- QTextBlock Class Reference
- QTextBlockFormat Class Reference
- QTextBlockGroup Class Reference
- QTextBlockUserData Class Reference
- QTextBoundaryFinder Class Reference
- QTextBrowser Class Reference
- QTextCharFormat Class Reference
- QTextCodec Class Reference
- QTextCursor Class Reference
- QTextDecoder Class Reference
- QTextDocument Class Reference
- QTextDocumentFragment Class Reference
- QTextDocumentWriter Class Reference
- QTextEdit Class Reference
- QTextEncoder Class Reference
- QTextFormat Class Reference
- QTextFragment Class Reference
- QTextFrame Class Reference
- QTextFrameFormat Class Reference
- QTextImageFormat Class Reference
- QTextInlineObject Class Reference
- QTextItem Class Reference
- QTextLayout Class Reference
- QTextLength Class Reference
- QTextLine Class Reference
- QTextList Class Reference
- QTextListFormat Class Reference
- QTextObject Class Reference
- QTextObjectInterface Class Reference
- QTextOption Class Reference
- QTextStream Class Reference
- QTextTable Class Reference
- QTextTableCell Class Reference
- QTextTableCellFormat Class Reference
- QTextTableFormat Class Reference
- QThread Class Reference
- QThreadPool Class Reference
- QTime Class Reference
- QTimeEdit Class Reference
- QTimeLine Class Reference
- QTimer Class Reference
- QTimerEvent Class Reference
- QToolBar Class Reference
- QToolBox Class Reference
- QToolButton Class Reference
- QToolTip Class Reference
- QTouchEvent Class Reference
- Reference
- QTransform Class Reference
- QTranslator Class Reference
- QTreeView Class Reference
- QTreeWidget Class Reference
- QTreeWidgetItem Class Reference
- QTreeWidgetItemIterator Class Reference
- QUdpSocket Class Reference
- QUndoCommand Class Reference
- QUndoGroup Class Reference
- QUndoStack Class Reference
- QUndoView Class Reference
- QUrl Class Reference
- QUrlInfo Class Reference
- QUuid Class Reference
- 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