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QPrintPreviewWidget Class Reference

The QPrintPreviewWidget class provides a widget for previewing page layouts for printer output. More...

 #include <QPrintPreviewWidget>

Inherits: QWidget.

This class was introduced in Qt 4.4.

Public Types

enum ViewMode { SinglePageView, FacingPagesView, AllPagesView }
enum ZoomMode { CustomZoom, FitToWidth, FitInView }

Public Functions

QPrintPreviewWidget ( QPrinter * printer, QWidget * parent = 0, Qt::WindowFlags flags = 0 )
QPrintPreviewWidget ( QWidget * parent = 0, Qt::WindowFlags flags = 0 )
~QPrintPreviewWidget ()
int currentPage () const
QPrinter::Orientation orientation () const
int pageCount () const
ViewMode viewMode () const
qreal zoomFactor () const
ZoomMode zoomMode () const

Reimplemented Public Functions

virtual void setVisible ( bool visible )
  • 217 public functions inherited from QWidget
  • 29 public functions inherited from QObject
  • 13 public functions inherited from QPaintDevice

Public Slots

void fitInView ()
void fitToWidth ()
void print ()
void setAllPagesViewMode ()
void setCurrentPage ( int page )
void setFacingPagesViewMode ()
void setLandscapeOrientation ()
void setOrientation ( QPrinter::Orientation orientation )
void setPortraitOrientation ()
void setSinglePageViewMode ()
void setViewMode ( ViewMode mode )
void setZoomFactor ( qreal factor )
void setZoomMode ( ZoomMode zoomMode )
void updatePreview ()
void zoomIn ( qreal factor = 1.1 )
void zoomOut ( qreal factor = 1.1 )
  • 19 public slots inherited from QWidget
  • 1 public slot inherited from QObject

Signals

void paintRequested ( QPrinter * printer )
void previewChanged ()

Additional Inherited Members

  • 58 properties inherited from QWidget
  • 1 property inherited from QObject
  • 4 static public members inherited from QWidget
  • 5 static public members inherited from QObject
  • 37 protected functions inherited from QWidget
  • 7 protected functions inherited from QObject
  • 1 protected function inherited from QPaintDevice
  • 1 protected slot inherited from QWidget

Detailed Description

The QPrintPreviewWidget class provides a widget for previewing page layouts for printer output.

QPrintPreviewDialog uses a QPrintPreviewWidget internally, and the purpose of QPrintPreviewWidget is to make it possible to embed the preview into other widgets. It also makes it possible to build a different user interface around it than the default one provided with QPrintPreviewDialog.

Using QPrintPreviewWidget is straightforward:

  1. Create the QPrintPreviewWidget

    Construct the QPrintPreviewWidget either by passing in an existing QPrinter object, or have QPrintPreviewWidget create a default constructed QPrinter object for you.

  2. Connect the paintRequested() signal to a slot.

    When the widget needs to generate a set of preview pages, a paintRequested() signal will be emitted from the widget. Connect a slot to this signal, and draw onto the QPrinter passed in as a signal parameter. Call QPrinter::newPage(), to start a new page in the preview.

See also QPrinter, QPrintDialog, QPageSetupDialog, and QPrintPreviewDialog.

Member Type Documentation

enum QPrintPreviewWidget::ViewMode

This enum is used to describe the view mode of the preview widget.

ConstantValueDescription
QPrintPreviewWidget::SinglePageView0A mode where single pages in the preview is viewed.
QPrintPreviewWidget::FacingPagesView1A mode where the facing pages in the preview is viewed.
QPrintPreviewWidget::AllPagesView2A view mode where all the pages in the preview is viewed.

enum QPrintPreviewWidget::ZoomMode

This enum is used to describe zoom mode of the preview widget.

ConstantValueDescription
QPrintPreviewWidget::CustomZoom0The zoom is set to a custom zoom value.
QPrintPreviewWidget::FitToWidth1This mode fits the current page to the width of the view.
QPrintPreviewWidget::FitInView2This mode fits the current page inside the view.

Member Function Documentation

QPrintPreviewWidget::QPrintPreviewWidget ( QPrinter * printer, QWidget * parent = 0, Qt::WindowFlags flags = 0 )

Constructs a QPrintPreviewWidget based on printer and with parent as the parent widget. The widget flags flags are passed on to the QWidget constructor.

See also QWidget::setWindowFlags().

QPrintPreviewWidget::QPrintPreviewWidget ( QWidget * parent = 0, Qt::WindowFlags flags = 0 )

This is an overloaded function.

This will cause QPrintPreviewWidget to create an internal, default constructed QPrinter object, which will be used to generate the preview.

QPrintPreviewWidget::~QPrintPreviewWidget ()

Destroys the QPrintPreviewWidget.

int QPrintPreviewWidget::currentPage () const

Returns the currently viewed page in the preview.

See also setCurrentPage().

void QPrintPreviewWidget::fitInView () [slot]

This is a convenience function and is the same as calling setZoomMode(QPrintPreviewWidget::FitInView).

void QPrintPreviewWidget::fitToWidth () [slot]

This is a convenience function and is the same as calling setZoomMode(QPrintPreviewWidget::FitToWidth).

QPrinter::Orientation QPrintPreviewWidget::orientation () const

Returns the current orientation of the preview. This value is obtained from the QPrinter object associated with the preview.

See also setOrientation().

int QPrintPreviewWidget::pageCount () const

Returns the number of pages in the preview.

This function was introduced in Qt 4.6.

void QPrintPreviewWidget::paintRequested ( QPrinter * printer ) [signal]

This signal is emitted when the preview widget needs to generate a set of preview pages. printer is the printer associated with this preview widget.

void QPrintPreviewWidget::previewChanged () [signal]

This signal is emitted whenever the preview widget has changed some internal state, such as the orientation.

void QPrintPreviewWidget::print () [slot]

Prints the preview to the printer associated with the preview.

void QPrintPreviewWidget::setAllPagesViewMode () [slot]

This is a convenience function and is the same as calling setViewMode(QPrintPreviewWidget::AllPagesView).

void QPrintPreviewWidget::setCurrentPage ( int page ) [slot]

Sets the current page in the preview. This will cause the view to skip to the beginning of page.

See also currentPage().

void QPrintPreviewWidget::setFacingPagesViewMode () [slot]

This is a convenience function and is the same as calling setViewMode(QPrintPreviewWidget::FacingPagesView).

void QPrintPreviewWidget::setLandscapeOrientation () [slot]

This is a convenience function and is the same as calling setOrientation(QPrinter::Landscape).

void QPrintPreviewWidget::setOrientation ( QPrinter::Orientation orientation ) [slot]

Sets the current orientation to orientation. This value will be set on the QPrinter object associated with the preview.

See also orientation().

void QPrintPreviewWidget::setPortraitOrientation () [slot]

This is a convenience function and is the same as calling setOrientation(QPrinter::Portrait).

void QPrintPreviewWidget::setSinglePageViewMode () [slot]

This is a convenience function and is the same as calling setViewMode(QPrintPreviewWidget::SinglePageView).

void QPrintPreviewWidget::setViewMode ( ViewMode mode ) [slot]

Sets the view mode to mode. The default view mode is SinglePageView.

See also viewMode().

void QPrintPreviewWidget::setVisible ( bool visible ) [virtual]

Reimplemented from QWidget::setVisible().

void QPrintPreviewWidget::setZoomFactor ( qreal factor ) [slot]

Sets the zoom factor of the view to factor. For example, a value of 1.0 indicates an unscaled view, which is approximately the size the view will have on paper. A value of 0.5 will halve the size of the view, while a value of 2.0 will double the size of the view.

See also zoomFactor().

void QPrintPreviewWidget::setZoomMode ( ZoomMode zoomMode ) [slot]

Sets the zoom mode to zoomMode. The default zoom mode is FitInView.

See also zoomMode(), viewMode(), and setViewMode().

void QPrintPreviewWidget::updatePreview () [slot]

This function updates the preview, which causes the paintRequested() signal to be emitted.

ViewMode QPrintPreviewWidget::viewMode () const

Returns the current view mode. The default view mode is SinglePageView.

See also setViewMode().

qreal QPrintPreviewWidget::zoomFactor () const

Returns the zoom factor of the view.

See also setZoomFactor().

void QPrintPreviewWidget::zoomIn ( qreal factor = 1.1 ) [slot]

Zooms the current view in by factor. The default value for factor is 1.1, which means the view will be scaled up by 10%.

ZoomMode QPrintPreviewWidget::zoomMode () const

Returns the current zoom mode.

See also setZoomMode(), viewMode(), and setViewMode().

void QPrintPreviewWidget::zoomOut ( qreal factor = 1.1 ) [slot]

Zooms the current view out by factor. The default value for factor is 1.1, which means the view will be scaled down by 10%.

Responsable bénévole de la rubrique Qt : Thibaut Cuvelier -