An individual overview which is drawn above the map content in a QgsLayoutItemMap, and shows the extent of another QgsLayoutItemMap. More...

#include <qgslayoutitemmapoverview.h>

Inheritance diagram for QgsLayoutItemMapOverview:

[legend]

Public Slots
void	overviewExtentChanged ()
	Handles recentering of the map and redrawing of the map's overview. More...

Public Slots inherited from QgsLayoutObject
virtual void	refresh ()
	Refreshes the object, causing a recalculation of any property overrides. More...

Public Member Functions
	QgsLayoutItemMapOverview (const QString &name, QgsLayoutItemMap *map)
	Constructor for QgsLayoutItemMapOverview. More...

	~QgsLayoutItemMapOverview () override

bool	accept (QgsStyleEntityVisitorInterface *visitor) const override
	Accepts the specified style entity visitor, causing it to visit all style entities associated with the map item. More...

QgsVectorLayer *	asMapLayer ()
	Returns a vector layer to render as part of the QgsLayoutItemMap render, containing a feature representing the overview extent (and with an appropriate renderer set matching the overview's frameSymbol() ). More...

QPainter::CompositionMode	blendMode () const
	Retrieves the blending mode used for drawing the overview. More...

bool	centered () const
	Returns whether the extent of the map is forced to center on the overview. More...

void	connectSignals ()
	Reconnects signals for overview map, so that overview correctly follows changes to source map's extent. More...

void	draw (QPainter *painter) override
	Draws the item on to a destination painter. More...

void	finalizeRestoreFromXml () override
	Called after all pending items have been restored from XML. More...

QgsFillSymbol *	frameSymbol ()
	Returns the fill symbol used for drawing the overview extent. More...

const QgsFillSymbol *	frameSymbol () const
	Returns the fill symbol used for drawing the overview extent. More...

bool	inverted () const
	Returns whether the overview frame is inverted, ie, whether the shaded area is drawn outside the extent of the overview map. More...

QgsLayoutItemMap *	linkedMap ()
	Returns the source map to show the overview extent of. More...

bool	readXml (const QDomElement &itemElem, const QDomDocument &doc, const QgsReadWriteContext &context) override
	Sets the map item state from a DOM document, where element is the DOM node corresponding to a 'LayoutMapGrid' tag. More...

void	setBlendMode (QPainter::CompositionMode mode)
	Sets the blending mode used for drawing the overview. More...

void	setCentered (bool centered)
	Sets whether the extent of the map is forced to center on the overview. More...

void	setFrameSymbol (QgsFillSymbol *symbol)
	Sets the fill symbol used for drawing the overview extent. More...

void	setInverted (bool inverted)
	Sets whether the overview frame is inverted, ie, whether the shaded area is drawn outside the extent of the overview map. More...

void	setLinkedMap (QgsLayoutItemMap *map)
	Sets the map to show the overview extent of. More...

bool	usesAdvancedEffects () const override
	Returns `true` if the item is drawn using advanced effects, such as blend modes. More...

bool	writeXml (QDomElement &elem, QDomDocument &doc, const QgsReadWriteContext &context) const override
	Stores map item state in a DOM element, where element is the DOM element corresponding to a 'LayoutMap' tag. More...

Public Member Functions inherited from QgsLayoutItemMapItem
	QgsLayoutItemMapItem (const QString &name, QgsLayoutItemMap *map)
	Constructor for QgsLayoutItemMapItem, attached to the specified map. More...

QgsExpressionContext	createExpressionContext () const override
	This method needs to be reimplemented in all classes which implement this interface and return an expression context. More...

bool	enabled () const
	Returns whether the item will be drawn. More...

QString	id () const
	Returns the unique id for the map item. More...

const QgsLayoutItemMap *	map () const
	Returns the layout item map for the item. More...

QString	name () const
	Returns the friendly display name for the item. More...

virtual void	setEnabled (bool enabled)
	Controls whether the item will be drawn. More...

void	setMap (QgsLayoutItemMap *map)
	Sets the corresponding layout map for the item. More...

void	setName (const QString &name)
	Sets the friendly display name for the item. More...

void	setStackingLayer (QgsMapLayer *layer)
	Sets the item's stacking layer, which specifies where the in the map's stack the item should be rendered. More...

void	setStackingPosition (StackingPosition position)
	Sets the item's stacking position, which specifies where the in the map's stack the item should be rendered. More...

QgsMapLayer *	stackingLayer () const
	Returns the item's stacking layer, which specifies where the in the map's stack the item should be rendered. More...

StackingPosition	stackingPosition () const
	Returns the item's stacking position, which specifies where the in the map's stack the item should be rendered. More...

Public Member Functions inherited from QgsLayoutObject
	QgsLayoutObject (QgsLayout *layout)
	Constructor for QgsLayoutObject, with the specified parent layout. More...

QgsExpressionContext	createExpressionContext () const override
	Creates an expression context relating to the objects' current state. More...

QStringList	customProperties () const
	Returns list of keys stored in custom properties for the object. More...

QVariant	customProperty (const QString &key, const QVariant &defaultValue=QVariant()) const
	Read a custom property from the object. More...

QgsPropertyCollection &	dataDefinedProperties ()
	Returns a reference to the object's property collection, used for data defined overrides. More...

const QgsPropertyCollection &	dataDefinedProperties () const
	Returns a reference to the object's property collection, used for data defined overrides. More...

const QgsLayout *	layout () const
	Returns the layout the object is attached to. More...

QgsLayout *	layout ()
	Returns the layout the object is attached to. More...

void	removeCustomProperty (const QString &key)
	Remove a custom property from the object. More...

void	setCustomProperty (const QString &key, const QVariant &value)
	Set a custom property for the object. More...

void	setDataDefinedProperties (const QgsPropertyCollection &collection)
	Sets the objects's property collection, used for data defined overrides. More...

Public Member Functions inherited from QgsExpressionContextGenerator
virtual	~QgsExpressionContextGenerator ()=default

Additional Inherited Members
Public Types inherited from QgsLayoutItemMapItem
enum	StackingPosition { StackBelowMap, StackBelowMapLayer, StackAboveMapLayer, StackBelowMapLabels, StackAboveMapLabels }
	Item stacking position, specifies where the in the map's stack the item should be rendered. More...

Public Types inherited from QgsLayoutObject
enum	DataDefinedProperty { NoProperty = 0, AllProperties, TestProperty, PresetPaperSize, PaperWidth, PaperHeight, NumPages, PaperOrientation, PageNumber, PositionX, PositionY, ItemWidth, ItemHeight, ItemRotation, Transparency, Opacity, BlendMode, ExcludeFromExports, FrameColor, BackgroundColor, MapRotation, MapScale, MapXMin, MapYMin, MapXMax, MapYMax, MapAtlasMargin, MapLayers, MapStylePreset, MapLabelMargin, MapGridEnabled, MapGridIntervalX, MapGridIntervalY, MapGridOffsetX, MapGridOffsetY, MapGridFrameSize, MapGridFrameMargin, MapGridLabelDistance, MapGridCrossSize, MapGridFrameLineThickness, PictureSource, PictureSvgBackgroundColor, PictureSvgStrokeColor, PictureSvgStrokeWidth, SourceUrl, LegendTitle, LegendColumnCount, ScalebarFillColor, ScalebarFillColor2, ScalebarLineColor, ScalebarLineWidth, AttributeTableSourceLayer }
	Data defined properties for different item types. More...

enum	PropertyValueType { EvaluatedValue = 0, OriginalValue }
	Specifies whether the value returned by a function should be the original, user set value, or the current evaluated value for the property. More...

Signals inherited from QgsLayoutObject
void	changed ()
	Emitted when the object's properties change. More...

Static Public Member Functions inherited from QgsLayoutObject
static const QgsPropertiesDefinition &	propertyDefinitions ()
	Returns the layout object property definitions. More...

Protected Member Functions inherited from QgsLayoutObject
bool	readObjectPropertiesFromElement (const QDomElement &parentElement, const QDomDocument &document, const QgsReadWriteContext &context)
	Sets object properties from a DOM element. More...

bool	writeObjectPropertiesToElement (QDomElement &parentElement, QDomDocument &document, const QgsReadWriteContext &context) const
	Stores object properties within an XML DOM element. More...

Protected Attributes inherited from QgsLayoutItemMapItem
bool	mEnabled
	True if item is to be displayed on map. More...

QgsLayoutItemMap *	mMap = nullptr
	Associated map. More...

QString	mName
	Friendly display name. More...

QgsMapLayerRef	mStackingLayer

StackingPosition	mStackingPosition = StackBelowMapLabels

QString	mUuid
	Unique id. More...

Protected Attributes inherited from QgsLayoutObject
QgsObjectCustomProperties	mCustomProperties
	Custom properties for object. More...

QgsPropertyCollection	mDataDefinedProperties

QPointer< QgsLayout >	mLayout

Detailed Description

An individual overview which is drawn above the map content in a QgsLayoutItemMap, and shows the extent of another QgsLayoutItemMap.

See also: QgsLayoutItemMapOverviewStack

Since: QGIS 3.0

Definition at line 126 of file qgslayoutitemmapoverview.h.

Constructor & Destructor Documentation

◆ QgsLayoutItemMapOverview()

QgsLayoutItemMapOverview::QgsLayoutItemMapOverview	(	const QString &	name,
		QgsLayoutItemMap *	map
	)

Constructor for QgsLayoutItemMapOverview.

Parameters

name	friendly display name for overview
map	QgsLayoutItemMap the overview is attached to

Definition at line 35 of file qgslayoutitemmapoverview.cpp.

◆ ~QgsLayoutItemMapOverview()

QgsLayoutItemMapOverview::~QgsLayoutItemMapOverview ( )

overridedefault

Member Function Documentation

◆ accept()

bool QgsLayoutItemMapOverview::accept ( QgsStyleEntityVisitorInterface * visitor ) const

overridevirtual

Accepts the specified style entity visitor, causing it to visit all style entities associated with the map item.

Returns true if the visitor should continue visiting other objects, or false if visiting should be canceled.

Since: QGIS 3.10

Reimplemented from QgsLayoutItemMapItem.

Definition at line 312 of file qgslayoutitemmapoverview.cpp.

◆ asMapLayer()

QgsVectorLayer * QgsLayoutItemMapOverview::asMapLayer ( )

Returns a vector layer to render as part of the QgsLayoutItemMap render, containing a feature representing the overview extent (and with an appropriate renderer set matching the overview's frameSymbol() ).

Ownership of the layer remain with the overview item.

Since: QGIS 3.6

Definition at line 256 of file qgslayoutitemmapoverview.cpp.

◆ blendMode()

QPainter::CompositionMode QgsLayoutItemMapOverview::blendMode ( ) const

inline

Retrieves the blending mode used for drawing the overview.

See also: setBlendMode()

Definition at line 182 of file qgslayoutitemmapoverview.h.

◆ centered()

bool QgsLayoutItemMapOverview::centered ( ) const

inline

Returns whether the extent of the map is forced to center on the overview.

See also: setCentered()

Definition at line 208 of file qgslayoutitemmapoverview.h.

◆ connectSignals()

void QgsLayoutItemMapOverview::connectSignals ( )

Reconnects signals for overview map, so that overview correctly follows changes to source map's extent.

Definition at line 242 of file qgslayoutitemmapoverview.cpp.

◆ draw()

void QgsLayoutItemMapOverview::draw ( QPainter * painter )

overridevirtual

Draws the item on to a destination painter.

Implements QgsLayoutItemMapItem.

Definition at line 55 of file qgslayoutitemmapoverview.cpp.

◆ finalizeRestoreFromXml()

void QgsLayoutItemMapOverview::finalizeRestoreFromXml ( )

overridevirtual

Called after all pending items have been restored from XML.

Map items can use this method to run steps which must take place after all items have been restored to the layout, such as connecting to signals emitted by other items, which may not have existed in the layout at the time readXml() was called. E.g. an overview can use this to connect to its linked map item after restoration from XML.