Stores information relating to the current rendering settings for a layout. More...

#include <qgslayoutrendercontext.h>

Inheritance diagram for QgsLayoutRenderContext:

Public Types
enum	Flag { FlagDebug = 1 << 1, FlagOutlineOnly = 1 << 2, FlagAntialiasing = 1 << 3, FlagUseAdvancedEffects = 1 << 4, FlagForceVectorOutput = 1 << 5, FlagHideCoverageLayer = 1 << 6 }
	Flags for controlling how a layout is rendered. More...

Signals
void	dpiChanged ()
	Emitted when the context's DPI is changed. More...

void	flagsChanged (QgsLayoutRenderContext::Flags flags)
	Emitted whenever the context's flags change. More...

Public Member Functions
	QgsLayoutRenderContext (QgsLayout *layout)
	Constructor for QgsLayoutRenderContext. More...

bool	boundingBoxesVisible () const
	Returns true if the item bounding boxes should be drawn. More...

int	currentExportLayer () const
	Returns the current item layer to draw while exporting. More...

double	dpi () const
	Returns the dpi for outputting the layout. More...

QgsLayoutRenderContext::Flags	flags () const
	Returns the current combination of flags used for rendering the layout. More...

bool	gridVisible () const
	Returns true if the page grid should be drawn. More...

bool	isPreviewRender () const
	Returns true if the render current being conducted is a preview render, i.e. More...

const QgsLayoutMeasurementConverter &	measurementConverter () const
	Returns the layout measurement converter to be used in the layout. More...

QgsLayoutMeasurementConverter &	measurementConverter ()
	Returns the layout measurement converter to be used in the layout. More...

bool	pagesVisible () const
	Returns whether the page items are be visible in the layout. More...

QgsRenderContext::Flags	renderContextFlags () const
	Returns the combination of render context flags matched to the layout context's settings. More...

void	setBoundingBoxesVisible (bool visible)
	Sets whether the item bounding boxes should be visible. More...

void	setCurrentExportLayer (int layer=-1)
	Sets the current item layer to draw while exporting. More...

void	setDpi (double dpi)
	Sets the dpi for outputting the layout. More...

void	setFlag (QgsLayoutRenderContext::Flag flag, bool on=true)
	Enables or disables a particular rendering flag for the layout. More...

void	setFlags (QgsLayoutRenderContext::Flags flags)
	Sets the combination of flags that will be used for rendering the layout. More...

void	setGridVisible (bool visible)
	Sets whether the page grid should be visible. More...

void	setPagesVisible (bool visible)
	Sets whether the page items should be visible in the layout. More...

bool	testFlag (Flag flag) const
	Check whether a particular rendering flag is enabled for the layout. More...

Friends
class	LayoutContextPreviewSettingRestorer

class	QgsLayoutExporter

class	TestQgsLayout

Detailed Description

Stores information relating to the current rendering settings for a layout.

Since: QGIS 3.0

Definition at line 32 of file qgslayoutrendercontext.h.

Member Enumeration Documentation

◆ Flag

enum QgsLayoutRenderContext::Flag

Flags for controlling how a layout is rendered.

Enumerator
FlagDebug	Debug/testing mode, items are drawn as solid rectangles.
FlagOutlineOnly	Render items as outlines only.
FlagAntialiasing	Use antialiasing when drawing items.
FlagUseAdvancedEffects	Enable advanced effects such as blend modes.
FlagForceVectorOutput	Force output in vector format where possible, even if items require rasterization to keep their correct appearance.
FlagHideCoverageLayer	Hide coverage layer in outputs.

Definition at line 40 of file qgslayoutrendercontext.h.

Constructor & Destructor Documentation

◆ QgsLayoutRenderContext()

QgsLayoutRenderContext::QgsLayoutRenderContext ( QgsLayout * layout )

Constructor for QgsLayoutRenderContext.

Definition at line 21 of file qgslayoutrendercontext.cpp.

Member Function Documentation

◆ boundingBoxesVisible()

bool QgsLayoutRenderContext::boundingBoxesVisible ( ) const

Returns true if the item bounding boxes should be drawn.

See also: setBoundingBoxesVisible()

Definition at line 98 of file qgslayoutrendercontext.cpp.

◆ currentExportLayer()

int QgsLayoutRenderContext::currentExportLayer ( ) const

inline

Returns the current item layer to draw while exporting.

QgsLayoutItem subclasses which support multi-layer SVG exports must check this and customize their rendering based on the layer.

If layer is -1, all item layers should be rendered.

See also: setCurrentExportLayer()

Definition at line 186 of file qgslayoutrendercontext.h.

◆ dpi()

double QgsLayoutRenderContext::dpi ( ) const

Returns the dpi for outputting the layout.

See also: setDpi()

Definition at line 83 of file qgslayoutrendercontext.cpp.

◆ dpiChanged

void QgsLayoutRenderContext::dpiChanged ( )

signal

Emitted when the context's DPI is changed.

◆ flags()

QgsLayoutRenderContext::Flags QgsLayoutRenderContext::flags ( ) const

Returns the current combination of flags used for rendering the layout.

See also: setFlags(); setFlag(); testFlag()

Definition at line 51 of file qgslayoutrendercontext.cpp.

◆ flagsChanged

void QgsLayoutRenderContext::flagsChanged ( QgsLayoutRenderContext::Flags flags )

signal

Emitted whenever the context's flags change.

See also: setFlags()

◆ gridVisible()

bool QgsLayoutRenderContext::gridVisible ( ) const

Returns true if the page grid should be drawn.

See also: setGridVisible()

Definition at line 88 of file qgslayoutrendercontext.cpp.

◆ isPreviewRender()

bool QgsLayoutRenderContext::isPreviewRender ( ) const

inline

Returns true if the render current being conducted is a preview render, i.e.

it is being rendered inside a QGraphicsView widget as opposed to a destination device (such as an image).

Definition at line 124 of file qgslayoutrendercontext.h.

◆ measurementConverter() [1/2]

const QgsLayoutMeasurementConverter& QgsLayoutRenderContext::measurementConverter ( ) const

inline

Returns the layout measurement converter to be used in the layout.

This converter is used for translating between other measurement units and the layout's native unit.

Definition at line 111 of file qgslayoutrendercontext.h.

◆ measurementConverter() [2/2]

QgsLayoutMeasurementConverter& QgsLayoutRenderContext::measurementConverter ( )

inline

Returns the layout measurement converter to be used in the layout.

This converter is used for translating between other measurement units and the layout's native unit.

Definition at line 117 of file qgslayoutrendercontext.h.

◆ pagesVisible()

bool QgsLayoutRenderContext::pagesVisible ( ) const

inline

Returns whether the page items are be visible in the layout.

This setting effects both display of the page boundaries in layout views and whether they will be rendered in layout exports.

See also: setPagesVisible()

Definition at line 164 of file qgslayoutrendercontext.h.

◆ renderContextFlags()

QgsRenderContext::Flags QgsLayoutRenderContext::renderContextFlags ( ) const

Returns the combination of render context flags matched to the layout context's settings.

Definition at line 61 of file qgslayoutrendercontext.cpp.

◆ setBoundingBoxesVisible()

void QgsLayoutRenderContext::setBoundingBoxesVisible ( bool visible )

Sets whether the item bounding boxes should be visible.

See also: boundingBoxesVisible()

Definition at line 103 of file qgslayoutrendercontext.cpp.

◆ setCurrentExportLayer()

void QgsLayoutRenderContext::setCurrentExportLayer ( int layer = -1 )

inline

Sets the current item layer to draw while exporting.

QgsLayoutItem subclasses which support multi-layer SVG exports must check the currentExportLayer() and customize their rendering based on the layer.

If layer is -1, all item layers will be rendered.

See also: currentExportLayer()

Definition at line 175 of file qgslayoutrendercontext.h.

◆ setDpi()

void QgsLayoutRenderContext::setDpi ( double dpi )

Sets the dpi for outputting the layout.

This also sets the corresponding DPI for the context's measurementConverter().

See also: dpi()

Definition at line 74 of file qgslayoutrendercontext.cpp.

◆ setFlag()

void QgsLayoutRenderContext::setFlag	(	QgsLayoutRenderContext::Flag	flag,
		bool	on = `true`
	)

Enables or disables a particular rendering flag for the layout.

Other existing flags are not affected.

See also: setFlags(); flags(); testFlag()

Definition at line 36 of file qgslayoutrendercontext.cpp.

◆ setFlags()

void QgsLayoutRenderContext::setFlags ( QgsLayoutRenderContext::Flags flags )

Sets the combination of flags that will be used for rendering the layout.

See also: setFlag(); flags(); testFlag()

Definition at line 27 of file qgslayoutrendercontext.cpp.

◆ setGridVisible()

void QgsLayoutRenderContext::setGridVisible ( bool visible )

Sets whether the page grid should be visible.

See also: gridVisible()

Definition at line 93 of file qgslayoutrendercontext.cpp.

◆ setPagesVisible()

void QgsLayoutRenderContext::setPagesVisible ( bool visible )

Sets whether the page items should be visible in the layout.

Removing them will prevent both display of the page boundaries in layout views and will also prevent them from being rendered in layout exports.

See also: pagesVisible()

Definition at line 108 of file qgslayoutrendercontext.cpp.

◆ testFlag()

bool QgsLayoutRenderContext::testFlag ( const QgsLayoutRenderContext::Flag flag ) const

Check whether a particular rendering flag is enabled for the layout.

See also: setFlags(); setFlag(); flags()

Definition at line 56 of file qgslayoutrendercontext.cpp.

Friends And Related Function Documentation

◆ LayoutContextPreviewSettingRestorer

friend class LayoutContextPreviewSettingRestorer

friend

Definition at line 218 of file qgslayoutrendercontext.h.

◆ QgsLayoutExporter

friend class QgsLayoutExporter

friend

Definition at line 216 of file qgslayoutrendercontext.h.

◆ TestQgsLayout

friend class TestQgsLayout

friend

Definition at line 217 of file qgslayoutrendercontext.h.

The documentation for this class was generated from the following files:

/tmp/buildd/qgis-3.2.0+99unstable/src/core/layout/qgslayoutrendercontext.h
/tmp/buildd/qgis-3.2.0+99unstable/src/core/layout/qgslayoutrendercontext.cpp

Public Types

Signals

Public Member Functions

Friends

Detailed Description

Member Enumeration Documentation

◆ Flag

Constructor & Destructor Documentation

◆ QgsLayoutRenderContext()

Member Function Documentation

◆ boundingBoxesVisible()

◆ currentExportLayer()

◆ dpi()

◆ dpiChanged

◆ flags()

◆ flagsChanged

◆ gridVisible()

◆ isPreviewRender()

◆ measurementConverter() [1/2]

◆ measurementConverter() [2/2]

◆ pagesVisible()

◆ renderContextFlags()

◆ setBoundingBoxesVisible()

◆ setCurrentExportLayer()

◆ setDpi()

◆ setFlag()

◆ setFlags()

◆ setGridVisible()

◆ setPagesVisible()

◆ testFlag()

Friends And Related Function Documentation

◆ LayoutContextPreviewSettingRestorer

◆ QgsLayoutExporter

◆ TestQgsLayout