Map canvas is a class for displaying all GIS data types on a canvas. More...

#include <qgsmapcanvas.h>

Inheritance diagram for QgsMapCanvas:

Classes
class	CanvasProperties
	Deprecated to be deleted, stuff from here should be moved elsewhere. More...

Public Types
enum	WheelAction { WheelZoom, WheelZoomAndRecenter, WheelZoomToMouseCursor, WheelNothing }

Public Slots
static void	enableRotation (bool enabled)
	change canvas rotation support More...

void	getDatumTransformInfo (const QgsMapLayer *ml, const QString &srcAuthId, const QString &destAuthId)
	ask user about datum transformation More...

bool	hasCrsTransformEnabled ()
	A simple helper method to find out if on the fly projections are enabled or not. More...

void	layerCrsChange ()
	This slot is connected to the layer's CRS change. More...

void	layerStateChange ()
	This slot is connected to the visibility change of one or more layers. More...

void	readProject (const QDomDocument &)
	called to read map canvas settings from project More...

void	refresh ()
	Repaints the canvas map. More...

bool	renderFlag ()
	State of render suppression flag. More...

static bool	rotationEnabled ()
	return if canvas rotation is enabled More...

void	saveAsImage (const QString &theFileName, QPixmap *QPixmap=nullptr, const QString &="PNG")
	Save the convtents of the map canvas to disk as an image. More...

void	selectionChangedSlot ()
	Receives signal about selection change, and pass it on with layer info. More...

void	setMagnificationFactor (double factor)
	Sets the factor of magnification to apply to the map canvas. More...

void	setRenderFlag (bool theFlag)
	Whether to suppress rendering or not. More...

void	setScaleLocked (bool isLocked)
	Lock the scale, so zooming can be performed using magnication. More...

Q_DECL_DEPRECATED void	showError (QgsMapLayer *mapLayer)

void	stopRendering ()
	stop rendering (if there is any right now) More...

Q_DECL_DEPRECATED void	updateMap ()

void	writeProject (QDomDocument &)
	called to write map canvas settings to project More...

void	zoomIn ()
	Zoom in with fixed factor. More...

void	zoomOut ()
	Zoom out with fixed factor. More...

Signals
void	currentLayerChanged (QgsMapLayer *layer)
	Emitted when the current layer is changed. More...

void	destinationCrsChanged ()
	Emitted when map CRS has changed. More...

void	extentsChanged ()
	Emitted when the extents of the map change. More...

void	hasCrsTransformEnabledChanged (bool flag)
	Emitted when on-the-fly projection has been turned on/off. More...

void	keyPressed (QKeyEvent *e)
	Emit key press event. More...

void	keyReleased (QKeyEvent *e)
	Emit key release event. More...

void	layersChanged ()
	Emitted when a new set of layers has been received. More...

void	layerStyleOverridesChanged ()
	Emitted when the configuration of overridden layer styles changes. More...

void	magnificationChanged (double)
	Emitted when the scale of the map changes. More...

void	mapCanvasRefreshed ()
	Emitted when canvas finished a refresh request. More...

void	mapToolSet (QgsMapTool *tool)
	Emit map tool changed event. More...

void	mapToolSet (QgsMapTool newTool, QgsMapTool oldTool)
	Emit map tool changed with the old tool. More...

void	mapUnitsChanged ()
	Emitted when map units are changed. More...

void	messageEmitted (const QString &title, const QString &message, QgsMessageBar::MessageLevel=QgsMessageBar::INFO)
	emit a message (usually to be displayed in a message bar) More...

void	renderComplete (QPainter *)
	Emitted when the canvas has rendered. More...

void	renderStarting ()
	Emitted when the canvas is about to be rendered. More...

void	rotationChanged (double)
	Emitted when the rotation of the map changes. More...

void	scaleChanged (double)
	Emitted when the scale of the map changes. More...

void	selectionChanged (QgsMapLayer *layer)
	Emitted when selection in any layer gets changed. More...

Q_DECL_DEPRECATED void	setProgress (int, int)
	Let the owner know how far we are with render operations. More...

void	xyCoordinates (const QgsPoint &p)
	Emits current mouse position. More...

void	zoomLastStatusChanged (bool)
	Emitted when zoom last status changed. More...

void	zoomNextStatusChanged (bool)
	Emitted when zoom next status changed. More...

Public Member Functions
	QgsMapCanvas (QWidget parent=nullptr, const char name=nullptr)
	Constructor. More...

	~QgsMapCanvas ()
	Destructor. More...

bool	antiAliasingEnabled () const
	true if antialising is enabled More...

virtual QColor	canvasColor () const
	Read property of QColor bgColor. More...

Q_DECL_DEPRECATED QPaintDevice &	canvasPaintDevice ()
	Accessor for the canvas paint device. More...

QgsPoint	center () const
	Get map center, in geographical coordinates. More...

Q_DECL_DEPRECATED void	clear ()
	Clear the map canvas. More...

void	clearCache ()
	Make sure to remove any rendered images from cache (does nothing if cache is not enabled) More...

void	clearExtentHistory ()

QgsMapLayer *	currentLayer ()
	returns current layer (set by legend widget) More...

void	enableAntiAliasing (bool theFlag)
	used to determine if anti-aliasing is enabled or not More...

void	enableMapTileRendering (bool theFlag)
	sets map tile rendering flag More...

void	enableOverviewMode (QgsMapOverviewCanvas *overview)

QgsExpressionContextScope &	expressionContextScope ()
	Returns a reference to the expression context scope for the map canvas. More...

const QgsExpressionContextScope &	expressionContextScope () const
	Returns a const reference to the expression context scope for the map canvas. More...

QgsRectangle	extent () const
	Returns the current zoom exent of the map canvas. More...

void	freeze (bool frz=true)
	Freeze/thaw the map canvas. More...

QgsRectangle	fullExtent () const
	Returns the combined exent for all layers on the map canvas. More...

const QgsMapToPixel *	getCoordinateTransform ()
	Get the current coordinate transform. More...

bool	isCachingEnabled () const
	Check whether images of rendered layers are curerently being cached. More...

Q_DECL_DEPRECATED bool	isDirty () const
	Return the state of the canvas (dirty or not) More...

bool	isDrawing ()
	Find out whether rendering is in progress. More...

bool	isFrozen ()
	Accessor for frozen status of canvas. More...

bool	isParallelRenderingEnabled () const
	Check whether the layers are rendered in parallel or sequentially. More...

const QgsLabelingResults *	labelingResults () const
	Get access to the labeling results (may be null) More...

QgsMapLayer *	layer (int index)
	return the map layer at position index in the layer stack More...

int	layerCount () const
	return number of layers on the map More...

QList< QgsMapLayer * >	layers () const
	return list of layers within map canvas. More...

QMap< QString, QString >	layerStyleOverrides () const
	Getter for stored overrides of styles for layers. More...

double	magnificationFactor () const
	Returns the magnification factor. More...

Q_DECL_DEPRECATED QgsMapCanvasMap *	map ()

Q_DECL_DEPRECATED QgsMapRenderer *	mapRenderer ()

const QgsMapSettings &	mapSettings () const
	Get access to properties used for map rendering. More...

QgsMapTool *	mapTool ()
	Returns the currently active tool. More...

QGis::UnitType	mapUnits () const
	Get the current canvas map units. More...

double	mapUnitsPerPixel () const
	Returns the mapUnitsPerPixel (map units per pixel) for the canvas. More...

int	mapUpdateInterval () const
	Find out how often map preview should be updated while it is being rendered (in milliseconds) More...

QPoint	mouseLastXY ()
	returns last position of mouse cursor More...

void	panAction (QMouseEvent *event)
	Called when mouse is moving and pan is activated. More...

void	panActionEnd (QPoint releasePoint)
	Ends pan action and redraws the canvas. More...

void	panToSelected (QgsVectorLayer *layer=nullptr)
	Pan to the selected features of current (vector) layer keeping same extent. More...

QgsPreviewEffect::PreviewMode	previewMode () const
	Returns the current preview mode for the map canvas. More...

bool	previewModeEnabled () const
	Returns whether a preview mode is enabled for the map canvas. More...

void	refreshAllLayers ()
	Reload all layers, clear the cache and refresh the canvas. More...

double	rotation () const
	Get the current map canvas rotation in clockwise degrees. More...

double	scale ()
	Get the last reported scale of the canvas. More...

bool	scaleLocked () const
	Returns whether the scale is locked, so zooming can be performed using magnication. More...

void	setCachingEnabled (bool enabled)
	Set whether to cache images of rendered layers. More...

virtual void	setCanvasColor (const QColor &_newVal)
	Write property of QColor bgColor. More...

void	setCenter (const QgsPoint &center)
	Set the center of the map canvas, in geographical coordinates. More...

void	setCrsTransformEnabled (bool enabled)
	sets whether to use projections for this layer set More...

void	setCurrentLayer (QgsMapLayer *layer)

void	setDestinationCrs (const QgsCoordinateReferenceSystem &crs)
	sets destination coordinate reference system More...

Q_DECL_DEPRECATED void	setDirty (bool _dirty)
	Flag the canvas as dirty and needed a refresh. More...

void	setExpressionContextScope (const QgsExpressionContextScope &scope)
	Sets an expression context scope for the map canvas. More...

void	setExtent (const QgsRectangle &r, bool magnified=false)
	Set the extent of the map canvas. More...

void	setLayerSet (QList< QgsMapCanvasLayer > &layers)

void	setLayerStyleOverrides (const QMap< QString, QString > &overrides)
	Setter for stored overrides of styles for layers. More...

void	setMapTool (QgsMapTool *mapTool)
	Sets the map tool currently being used on the canvas. More...

void	setMapUnits (QGis::UnitType mapUnits)
	Set map units (needed by project properties dialog) More...

void	setMapUpdateInterval (int timeMilliseconds)
	Set how often map preview should be updated while it is being rendered (in milliseconds) More...

void	setParallelRenderingEnabled (bool enabled)
	Set whether the layers are rendered in parallel or sequentially. More...

void	setPreviewMode (QgsPreviewEffect::PreviewMode mode)
	Sets a preview mode for the map canvas. More...

void	setPreviewModeEnabled (bool previewEnabled)
	Enables a preview mode for the map canvas. More...

void	setRotation (double degrees)
	Set the rotation of the map canvas in clockwise degrees. More...

void	setSegmentationTolerance (double tolerance)
	Sets the segmentation tolerance applied when rendering curved geometries. More...

void	setSegmentationToleranceType (QgsAbstractGeometryV2::SegmentationToleranceType type)
	Sets segmentation tolerance type (maximum angle or maximum difference between curve and approximation) More...

void	setSelectionColor (const QColor &color)
	Set color of selected vector features. More...

void	setSnappingUtils (QgsSnappingUtils *utils)
	Assign an instance of snapping utils to the map canvas. More...

Q_DECL_DEPRECATED void	setWheelAction (WheelAction action, double factor=2)
	set wheel action and zoom factor (should be greater than 1) More...

void	setWheelFactor (double factor)
	set wheel zoom factor (should be greater than 1) More...

QgsSnappingUtils *	snappingUtils () const
	Return snapping utility class that is associated with map canvas. More...

void	unsetMapTool (QgsMapTool *mapTool)
	Unset the current map tool or last non zoom tool. More...

Q_DECL_DEPRECATED void	updateFullExtent ()
	Updates the full extent. More...

void	updateOverview ()

void	updateScale ()
	Emits signal scaleChanged to update scale in main window. More...

Q_DECL_DEPRECATED void	useImageToRender (bool theFlag)
	Select which Qt class to render with. More...

void	zoomByFactor (double scaleFactor, const QgsPoint *center=nullptr)
	Zoom with the factor supplied. More...

void	zoomScale (double scale)
	Zoom to a specific scale. More...

void	zoomToFeatureIds (QgsVectorLayer *layer, const QgsFeatureIds &ids)
	Set canvas extent to the bounding box of a set of features. More...

void	zoomToFullExtent ()
	Zoom to the full extent of all layers. More...

void	zoomToNextExtent ()
	Zoom to the next extent (view) More...

void	zoomToPreviousExtent ()
	Zoom to the previous extent (view) More...

void	zoomToSelected (QgsVectorLayer *layer=nullptr)
	Zoom to the extent of the selected features of current (vector) layer. More...

void	zoomWithCenter (int x, int y, bool zoomIn)
	Zooms in/out with a given center. More...

Public Member Functions inherited from QGraphicsView
	QGraphicsView (QWidget *parent)

	QGraphicsView (QGraphicsScene scene, QWidget parent)

	~QGraphicsView ()

Qt::Alignment	alignment () const

QBrush	backgroundBrush () const

CacheMode	cacheMode () const

void	centerOn (const QPointF &pos)

void	centerOn (qreal x, qreal y)

void	centerOn (const QGraphicsItem *item)

DragMode	dragMode () const

void	ensureVisible (const QRectF &rect, int xmargin, int ymargin)

void	ensureVisible (qreal x, qreal y, qreal w, qreal h, int xmargin, int ymargin)

void	ensureVisible (const QGraphicsItem *item, int xmargin, int ymargin)

void	fitInView (const QRectF &rect, Qt::AspectRatioMode aspectRatioMode)

void	fitInView (qreal x, qreal y, qreal w, qreal h, Qt::AspectRatioMode aspectRatioMode)

void	fitInView (const QGraphicsItem *item, Qt::AspectRatioMode aspectRatioMode)

QBrush	foregroundBrush () const

virtual QVariant	inputMethodQuery (Qt::InputMethodQuery query) const

void	invalidateScene (const QRectF &rect, QFlags< QGraphicsScene::SceneLayer > layers)

bool	isInteractive () const

bool	isTransformed () const

QGraphicsItem *	itemAt (const QPoint &pos) const

QGraphicsItem *	itemAt (int x, int y) const

QList< QGraphicsItem * >	items () const

QList< QGraphicsItem * >	items (const QPolygon &polygon, Qt::ItemSelectionMode mode) const

QList< QGraphicsItem * >	items (int x, int y) const

QList< QGraphicsItem * >	items (const QRect &rect, Qt::ItemSelectionMode mode) const

QList< QGraphicsItem * >	items (int x, int y, int w, int h, Qt::ItemSelectionMode mode) const

QList< QGraphicsItem * >	items (const QPainterPath &path, Qt::ItemSelectionMode mode) const

QList< QGraphicsItem * >	items (const QPoint &pos) const

QPoint	mapFromScene (const QPointF &point) const

QPolygon	mapFromScene (const QRectF &rect) const

QPolygon	mapFromScene (const QPolygonF &polygon) const

QPoint	mapFromScene (qreal x, qreal y) const

QPolygon	mapFromScene (qreal x, qreal y, qreal w, qreal h) const

QPainterPath	mapFromScene (const QPainterPath &path) const

QPolygonF	mapToScene (const QRect &rect) const

QPolygonF	mapToScene (const QPolygon &polygon) const

QPointF	mapToScene (const QPoint &point) const

QPolygonF	mapToScene (int x, int y, int w, int h) const

QPointF	mapToScene (int x, int y) const

QPainterPath	mapToScene (const QPainterPath &path) const

QMatrix	matrix () const

OptimizationFlags	optimizationFlags () const

void	render (QPainter *painter, const QRectF &target, const QRect &source, Qt::AspectRatioMode aspectRatioMode)

QPainter::RenderHints	renderHints () const

void	resetCachedContent ()

void	resetMatrix ()

void	resetTransform ()

ViewportAnchor	resizeAnchor () const

void	rotate (qreal angle)

Qt::ItemSelectionMode	rubberBandSelectionMode () const

void	scale (qreal sx, qreal sy)

QGraphicsScene *	scene () const

QRectF	sceneRect () const

void	setAlignment (QFlags< Qt::AlignmentFlag > alignment)

void	setBackgroundBrush (const QBrush &brush)

void	setCacheMode (QFlags< QGraphicsView::CacheModeFlag > mode)

void	setDragMode (DragMode mode)

void	setForegroundBrush (const QBrush &brush)

void	setInteractive (bool allowed)

void	setMatrix (const QMatrix &matrix, bool combine)

void	setOptimizationFlag (OptimizationFlag flag, bool enabled)

void	setOptimizationFlags (QFlags< QGraphicsView::OptimizationFlag > flags)

void	setRenderHint (QPainter::RenderHint hint, bool enabled)

void	setRenderHints (QFlags< QPainter::RenderHint > hints)

void	setResizeAnchor (ViewportAnchor anchor)

void	setRubberBandSelectionMode (Qt::ItemSelectionMode mode)

void	setScene (QGraphicsScene *scene)

void	setSceneRect (qreal x, qreal y, qreal w, qreal h)

void	setSceneRect (const QRectF &rect)

void	setTransform (const QTransform &matrix, bool combine)

void	setTransformationAnchor (ViewportAnchor anchor)

void	setViewportUpdateMode (ViewportUpdateMode mode)

void	shear (qreal sh, qreal sv)

virtual QSize	sizeHint () const

QTransform	transform () const

ViewportAnchor	transformationAnchor () const

void	translate (qreal dx, qreal dy)

void	updateScene (const QList< QRectF > &rects)

void	updateSceneRect (const QRectF &rect)

QTransform	viewportTransform () const

ViewportUpdateMode	viewportUpdateMode () const

Public Member Functions inherited from QAbstractScrollArea
	QAbstractScrollArea (QWidget *parent)

	~QAbstractScrollArea ()

void	addScrollBarWidget (QWidget *widget, QFlags< Qt::AlignmentFlag > alignment)

QWidget *	cornerWidget () const

QScrollBar *	horizontalScrollBar () const

Qt::ScrollBarPolicy	horizontalScrollBarPolicy () const

QSize	maximumViewportSize () const

virtual QSize	minimumSizeHint () const

QWidgetList	scrollBarWidgets (QFlags< Qt::AlignmentFlag > alignment)

void	setCornerWidget (QWidget *widget)

void	setHorizontalScrollBar (QScrollBar *scrollBar)

void	setHorizontalScrollBarPolicy (Qt::ScrollBarPolicy)

void	setVerticalScrollBar (QScrollBar *scrollBar)

void	setVerticalScrollBarPolicy (Qt::ScrollBarPolicy)

void	setViewport (QWidget *widget)

QScrollBar *	verticalScrollBar () const

Qt::ScrollBarPolicy	verticalScrollBarPolicy () const

QWidget *	viewport () const

Public Member Functions inherited from QFrame
	QFrame (QWidget *parent, QFlags< Qt::WindowType > f)

	QFrame (QWidget parent, const char name, QFlags< Qt::WindowType > f)

	~QFrame ()

QRect	frameRect () const

Shadow	frameShadow () const

Shape	frameShape () const

int	frameStyle () const

int	frameWidth () const

int	lineWidth () const

int	midLineWidth () const

void	setFrameRect (const QRect &)

void	setFrameShadow (Shadow)

void	setFrameShape (Shape)

void	setFrameStyle (int style)

void	setLineWidth (int)

void	setMidLineWidth (int)

Public Member Functions inherited from QWidget
	QWidget (QWidget *parent, QFlags< Qt::WindowType > f)

	QWidget (QWidget parent, const char name, QFlags< Qt::WindowType > f)

	~QWidget ()

bool	acceptDrops () const

QString	accessibleDescription () const

QString	accessibleName () const

QList< QAction * >	actions () const

void	activateWindow ()

void	addAction (QAction *action)

void	addActions (QList< QAction * > actions)

void	adjustSize ()

bool	autoFillBackground () const

Qt::BackgroundMode	backgroundMode () const

QPoint	backgroundOffset () const

BackgroundOrigin	backgroundOrigin () const

QPalette::ColorRole	backgroundRole () const

QSize	baseSize () const

QString	caption () const

QWidget *	childAt (int x, int y, bool includeThis) const

QWidget *	childAt (const QPoint &p, bool includeThis) const

QWidget *	childAt (int x, int y) const

QWidget *	childAt (const QPoint &p) const

QRect	childrenRect () const

QRegion	childrenRegion () const

void	clearFocus ()

void	clearMask ()

bool	close (bool alsoDelete)

bool	close ()

QColorGroup	colorGroup () const

void	constPolish () const

QMargins	contentsMargins () const

QRect	contentsRect () const

Qt::ContextMenuPolicy	contextMenuPolicy () const

QCursor	cursor () const

void	customContextMenuRequested (const QPoint &pos)

void	drawText (const QPoint &p, const QString &s)

void	drawText (int x, int y, const QString &s)

WId	effectiveWinId () const

void	ensurePolished () const

void	erase ()

void	erase (const QRect &rect)

void	erase (const QRegion &rgn)

void	erase (int x, int y, int w, int h)

Qt::FocusPolicy	focusPolicy () const

QWidget *	focusProxy () const

QWidget *	focusWidget () const

const QFont &	font () const

QFontInfo	fontInfo () const

QFontMetrics	fontMetrics () const

QPalette::ColorRole	foregroundRole () const

QRect	frameGeometry () const

QSize	frameSize () const

const QRect &	geometry () const

void	getContentsMargins (int left, int top, int right, int bottom) const

virtual HDC	getDC () const

void	grabGesture (Qt::GestureType gesture, QFlags< Qt::GestureFlag > flags)

void	grabKeyboard ()

void	grabMouse ()

void	grabMouse (const QCursor &cursor)

int	grabShortcut (const QKeySequence &key, Qt::ShortcutContext context)

QGraphicsEffect *	graphicsEffect () const

QGraphicsProxyWidget *	graphicsProxyWidget () const

bool	hasEditFocus () const

bool	hasFocus () const

bool	hasMouse () const

bool	hasMouseTracking () const

int	height () const

virtual int	heightForWidth (int w) const

void	hide ()

const QPixmap *	icon () const

void	iconify ()

QString	iconText () const

QInputContext *	inputContext ()

Qt::InputMethodHints	inputMethodHints () const

void	insertAction (QAction before, QAction action)

void	insertActions (QAction before, QList< QAction > actions)

bool	isActiveWindow () const

bool	isAncestorOf (const QWidget *child) const

bool	isDesktop () const

bool	isDialog () const

bool	isEnabled () const

bool	isEnabledTo (QWidget *ancestor) const

bool	isEnabledToTLW () const

bool	isFullScreen () const

bool	isHidden () const

bool	isInputMethodEnabled () const

bool	isMaximized () const

bool	isMinimized () const

bool	isModal () const

bool	isPopup () const

bool	isShown () const

bool	isTopLevel () const

bool	isUpdatesEnabled () const

bool	isVisible () const

bool	isVisibleTo (QWidget *ancestor) const

bool	isVisibleToTLW () const

bool	isWindow () const

bool	isWindowModified () const

QLayout *	layout () const

Qt::LayoutDirection	layoutDirection () const

QLocale	locale () const

void	lower ()

Qt::HANDLE	macCGHandle () const

Qt::HANDLE	macQDHandle () const

QPoint	mapFrom (QWidget *parent, const QPoint &pos) const

QPoint	mapFromGlobal (const QPoint &pos) const

QPoint	mapFromParent (const QPoint &pos) const

QPoint	mapTo (QWidget *parent, const QPoint &pos) const

QPoint	mapToGlobal (const QPoint &pos) const

QPoint	mapToParent (const QPoint &pos) const

QRegion	mask () const

int	maximumHeight () const

QSize	maximumSize () const

int	maximumWidth () const

int	minimumHeight () const

QSize	minimumSize () const

int	minimumWidth () const

void	move (int x, int y)

void	move (const QPoint &)

QWidget *	nativeParentWidget () const

QWidget *	nextInFocusChain () const

QRect	normalGeometry () const

void	overrideWindowFlags (QFlags< Qt::WindowType > flags)

bool	ownCursor () const

bool	ownFont () const

bool	ownPalette () const

virtual QPaintEngine *	paintEngine () const

const QPalette &	palette () const

QWidget *	parentWidget (bool sameWindow) const

QWidget *	parentWidget () const

QPlatformWindow *	platformWindow () const

QPlatformWindowFormat	platformWindowFormat () const

void	polish ()

QPoint	pos () const

QWidget *	previousInFocusChain () const

void	raise ()

void	recreate (QWidget *parent, QFlags< Qt::WindowType > f, const QPoint &p, bool showIt)

QRect	rect () const

virtual void	releaseDC (HDC hdc) const

void	releaseKeyboard ()

void	releaseMouse ()

void	releaseShortcut (int id)

void	removeAction (QAction *action)

void	render (QPaintDevice *target, const QPoint &targetOffset, const QRegion &sourceRegion, QFlags< QWidget::RenderFlag > renderFlags)

void	render (QPainter *painter, const QPoint &targetOffset, const QRegion &sourceRegion, QFlags< QWidget::RenderFlag > renderFlags)

void	repaint (int x, int y, int w, int h, bool b)

void	repaint (const QRegion &rgn, bool b)

void	repaint ()

void	repaint (int x, int y, int w, int h)

void	repaint (const QRegion &rgn)

void	repaint (bool b)

void	repaint (const QRect &rect)

void	repaint (const QRect &r, bool b)

void	reparent (QWidget *parent, QFlags< Qt::WindowType > f, const QPoint &p, bool showIt)

void	reparent (QWidget *parent, const QPoint &p, bool showIt)

void	resize (int w, int h)

void	resize (const QSize &)

bool	restoreGeometry (const QByteArray &geometry)

QByteArray	saveGeometry () const

void	scroll (int dx, int dy)

void	scroll (int dx, int dy, const QRect &r)

void	setAcceptDrops (bool on)

void	setAccessibleDescription (const QString &description)

void	setAccessibleName (const QString &name)

void	setActiveWindow ()

void	setAttribute (Qt::WidgetAttribute attribute, bool on)

void	setAutoFillBackground (bool enabled)

void	setBackgroundColor (const QColor &color)

void	setBackgroundMode (Qt::BackgroundMode widgetBackground, Qt::BackgroundMode paletteBackground)

void	setBackgroundOrigin (BackgroundOrigin background)

void	setBackgroundPixmap (const QPixmap &pixmap)

void	setBackgroundRole (QPalette::ColorRole role)

void	setBaseSize (const QSize &)

void	setBaseSize (int basew, int baseh)

void	setCaption (const QString &c)

void	setContentsMargins (int left, int top, int right, int bottom)

void	setContentsMargins (const QMargins &margins)

void	setContextMenuPolicy (Qt::ContextMenuPolicy policy)

void	setCursor (const QCursor &)

void	setDisabled (bool disable)

void	setEditFocus (bool enable)

void	setEnabled (bool)

void	setEraseColor (const QColor &color)

void	setErasePixmap (const QPixmap &pixmap)

void	setFixedHeight (int h)

void	setFixedSize (const QSize &s)

void	setFixedSize (int w, int h)

void	setFixedWidth (int w)

void	setFocus (Qt::FocusReason reason)

void	setFocus ()

void	setFocusPolicy (Qt::FocusPolicy policy)

void	setFocusProxy (QWidget *w)

void	setFont (const QFont &)

void	setFont (const QFont &f, bool b)

void	setForegroundRole (QPalette::ColorRole role)

void	setGeometry (int x, int y, int w, int h)

void	setGeometry (const QRect &)

void	setGraphicsEffect (QGraphicsEffect *effect)

void	setHidden (bool hidden)

void	setIcon (const QPixmap &i)

void	setIconText (const QString &it)

void	setInputContext (QInputContext *context)

void	setInputMethodEnabled (bool enabled)

void	setInputMethodHints (QFlags< Qt::InputMethodHint > hints)

void	setKeyCompression (bool b)

void	setLayout (QLayout *layout)

void	setLayoutDirection (Qt::LayoutDirection direction)

void	setLocale (const QLocale &locale)

void	setMask (const QBitmap &bitmap)

void	setMask (const QRegion &region)

void	setMaximumHeight (int maxh)

void	setMaximumSize (const QSize &)

void	setMaximumSize (int maxw, int maxh)

void	setMaximumWidth (int maxw)

void	setMinimumHeight (int minh)

void	setMinimumSize (int minw, int minh)

void	setMinimumSize (const QSize &)

void	setMinimumWidth (int minw)

void	setMouseTracking (bool enable)

void	setPalette (const QPalette &)

void	setPalette (const QPalette &p, bool b)

void	setPaletteBackgroundColor (const QColor &color)

void	setPaletteBackgroundPixmap (const QPixmap &pixmap)

void	setPaletteForegroundColor (const QColor &color)

void	setParent (QWidget *parent)

void	setParent (QWidget *parent, QFlags< Qt::WindowType > f)

void	setPlatformWindow (QPlatformWindow *window)

void	setPlatformWindowFormat (const QPlatformWindowFormat &format)

void	setShortcutAutoRepeat (int id, bool enable)

void	setShortcutEnabled (int id, bool enable)

void	setShown (bool shown)

void	setSizeIncrement (const QSize &)

void	setSizeIncrement (int w, int h)

void	setSizePolicy (QSizePolicy::Policy hor, QSizePolicy::Policy ver, bool hfw)

void	setSizePolicy (QSizePolicy::Policy horizontal, QSizePolicy::Policy vertical)

void	setSizePolicy (QSizePolicy)

void	setStatusTip (const QString &)

void	setStyle (QStyle *style)

QStyle *	setStyle (const QString &style)

void	setStyleSheet (const QString &styleSheet)

void	setToolTip (const QString &)

void	setUpdatesEnabled (bool enable)

void	setupUi (QWidget *widget)

virtual void	setVisible (bool visible)

void	setWhatsThis (const QString &)

void	setWindowFilePath (const QString &filePath)

void	setWindowFlags (QFlags< Qt::WindowType > type)

void	setWindowIcon (const QIcon &icon)

void	setWindowIconText (const QString &)

void	setWindowModality (Qt::WindowModality windowModality)

void	setWindowModified (bool)

void	setWindowOpacity (qreal level)

void	setWindowRole (const QString &role)

void	setWindowState (QFlags< Qt::WindowState > windowState)

void	setWindowSurface (QWindowSurface *surface)

void	setWindowTitle (const QString &)

void	show ()

void	showFullScreen ()

void	showMaximized ()

void	showMinimized ()

void	showNormal ()

QSize	size () const

QSize	sizeIncrement () const

QSizePolicy	sizePolicy () const

void	stackUnder (QWidget *w)

QString	statusTip () const

QStyle *	style () const

QString	styleSheet () const

bool	testAttribute (Qt::WidgetAttribute attribute) const

QString	toolTip () const

QWidget *	topLevelWidget () const

bool	underMouse () const

void	ungrabGesture (Qt::GestureType gesture)

void	unsetCursor ()

void	unsetFont ()

void	unsetLayoutDirection ()

void	unsetLocale ()

void	unsetPalette ()

void	update (const QRect &rect)

void	update (const QRegion &rgn)

void	update (int x, int y, int w, int h)

void	update ()

void	updateGeometry ()

bool	updatesEnabled () const

QRect	visibleRect () const

QRegion	visibleRegion () const

QString	whatsThis () const

int	width () const

QWidget *	window () const

QString	windowFilePath () const

Qt::WindowFlags	windowFlags () const

QIcon	windowIcon () const

QString	windowIconText () const

Qt::WindowModality	windowModality () const

qreal	windowOpacity () const

QString	windowRole () const

Qt::WindowStates	windowState () const

QWindowSurface *	windowSurface () const

QString	windowTitle () const

Qt::WindowType	windowType () const

WId	winId () const

int	x () const

const QX11Info &	x11Info () const

Qt::HANDLE	x11PictureHandle () const

int	y () const

Public Member Functions inherited from QObject
	QObject (QObject *parent)

	QObject (QObject parent, const char name)

virtual	~QObject ()

bool	blockSignals (bool block)

QObject *	child (const char objName, const char inheritsClass, bool recursiveSearch) const

const QObjectList &	children () const

const char *	className () const

bool	connect (const QObject sender, const char signal, const char *method, Qt::ConnectionType type) const

void	deleteLater ()

void	destroyed (QObject *obj)

bool	disconnect (const QObject receiver, const char method)

bool	disconnect (const char signal, const QObject receiver, const char *method)

void	dumpObjectInfo ()

void	dumpObjectTree ()

QList< QByteArray >	dynamicPropertyNames () const

virtual bool	eventFilter (QObject watched, QEvent event)

T	findChild (const QString &name) const

QList< T >	findChildren (const QRegExp &regExp) const

QList< T >	findChildren (const QString &name) const

bool	inherits (const char *className) const

void	insertChild (QObject *object)

void	installEventFilter (QObject *filterObj)

bool	isA (const char *className) const

bool	isWidgetType () const

void	killTimer (int id)

virtual const QMetaObject *	metaObject () const

void	moveToThread (QThread *targetThread)

const char *	name () const

const char *	name (const char *defaultName) const

QString	objectName () const

QObject *	parent () const

QVariant	property (const char *name) const

void	removeChild (QObject *object)

void	removeEventFilter (QObject *obj)

void	setName (const char *name)

void	setObjectName (const QString &name)

void	setParent (QObject *parent)

bool	setProperty (const char *name, const QVariant &value)

bool	signalsBlocked () const

int	startTimer (int interval)

QThread *	thread () const

Public Member Functions inherited from QPaintDevice
virtual	~QPaintDevice ()

int	colorCount () const

int	depth () const

int	height () const

int	heightMM () const

int	logicalDpiX () const

int	logicalDpiY () const

int	numColors () const

virtual QPaintEngine *	paintEngine () const=0

bool	paintingActive () const

int	physicalDpiX () const

int	physicalDpiY () const

int	width () const

int	widthMM () const

int	x11Cells () const

Qt::HANDLE	x11Colormap () const

bool	x11DefaultColormap () const

bool	x11DefaultVisual () const

int	x11Depth () const

Display *	x11Display () const

int	x11Screen () const

void *	x11Visual () const

Protected Member Functions
void	dragEnterEvent (QDragEnterEvent *e) override
	Overridden drag enter event. More...

void	keyPressEvent (QKeyEvent *e) override
	Overridden key press event. More...

void	keyReleaseEvent (QKeyEvent *e) override
	Overridden key release event. More...

void	mouseDoubleClickEvent (QMouseEvent *e) override
	Overridden mouse double click event. More...

void	mouseMoveEvent (QMouseEvent *e) override
	Overridden mouse move event. More...

void	mousePressEvent (QMouseEvent *e) override
	Overridden mouse press event. More...

void	mouseReleaseEvent (QMouseEvent *e) override
	Overridden mouse release event. More...

void	moveCanvasContents (bool reset=false)
	called when panning is in action, reset indicates end of panning More...

void	paintEvent (QPaintEvent *e) override
	Overridden paint event. More...

void	resizeEvent (QResizeEvent *e) override
	Overridden resize event. More...

void	updateCanvasItemPositions ()
	called on resize or changed extent to notify canvas items to change their rectangle More...

void	updateDatumTransformEntries ()
	Make sure the datum transform store is properly populated. More...

void	wheelEvent (QWheelEvent *e) override
	Overridden mouse wheel event. More...

void	zoomToFeatureExtent (QgsRectangle &rect)
	Zooms to feature extent. More...

Protected Member Functions inherited from QGraphicsView
virtual void	contextMenuEvent (QContextMenuEvent *event)

virtual void	dragLeaveEvent (QDragLeaveEvent *event)

virtual void	dragMoveEvent (QDragMoveEvent *event)

virtual void	drawBackground (QPainter *painter, const QRectF &rect)

virtual void	drawForeground (QPainter *painter, const QRectF &rect)

virtual void	drawItems (QPainter painter, int numItems, QGraphicsItem [] items, const QStyleOptionGraphicsItem[] options)

virtual void	dropEvent (QDropEvent *event)

virtual bool	event (QEvent *event)

virtual void	focusInEvent (QFocusEvent *event)

virtual bool	focusNextPrevChild (bool next)

virtual void	focusOutEvent (QFocusEvent *event)

virtual void	inputMethodEvent (QInputMethodEvent *event)

virtual void	scrollContentsBy (int dx, int dy)

void	setupViewport (QWidget *widget)

virtual void	showEvent (QShowEvent *event)

virtual bool	viewportEvent (QEvent *event)

Protected Member Functions inherited from QAbstractScrollArea
void	setupViewport (QWidget *viewport)

void	setViewportMargins (const QMargins &margins)

void	setViewportMargins (int left, int top, int right, int bottom)

Protected Member Functions inherited from QFrame
virtual void	changeEvent (QEvent *ev)

Protected Member Functions inherited from QWidget
virtual void	actionEvent (QActionEvent *event)

virtual void	closeEvent (QCloseEvent *event)

void	create (WId window, bool initializeWindow, bool destroyOldWindow)

void	destroy (bool destroyWindow, bool destroySubWindows)

virtual void	enterEvent (QEvent *event)

bool	focusNextChild ()

bool	focusPreviousChild ()

virtual void	hideEvent (QHideEvent *event)

virtual void	languageChange ()

virtual void	leaveEvent (QEvent *event)

virtual bool	macEvent (EventHandlerCallRef caller, EventRef event)

virtual int	metric (PaintDeviceMetric m) const

virtual void	moveEvent (QMoveEvent *event)

virtual bool	qwsEvent (QWSEvent *event)

void	resetInputContext ()

virtual void	tabletEvent (QTabletEvent *event)

void	updateMicroFocus ()

virtual bool	winEvent (MSG message, long result)

virtual bool	x11Event (XEvent *event)

Protected Member Functions inherited from QObject
bool	checkConnectArgs (const char signal, const QObject object, const char *method)

virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const char *signal)

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const char *signal)

int	receivers (const char *signal) const

QObject *	sender () const

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *event)

Protected Member Functions inherited from QPaintDevice
	QPaintDevice ()

Protected Attributes
QScopedPointer< CanvasProperties >	mCanvasProperties
	Handle pattern for implementation object. More...

Friends
class	TestQgsMapCanvas

Additional Inherited Members
Static Public Member Functions inherited from QWidget
QWidget *	find (WId id)

QWidget *	keyboardGrabber ()

QWidget *	mouseGrabber ()

void	setTabOrder (QWidget first, QWidget second)

QWidgetMapper *	wmapper ()

Static Public Member Functions inherited from QObject
bool	connect (const QObject sender, const char signal, const QObject receiver, const char method, Qt::ConnectionType type)

bool	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type)

bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char method)

bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method)

QString	tr (const char sourceText, const char disambiguation, int n)

QString	trUtf8 (const char sourceText, const char disambiguation, int n)

Static Public Member Functions inherited from QPaintDevice
int	x11AppCells (int screen)

Qt::HANDLE	x11AppColormap (int screen)

bool	x11AppDefaultColormap (int screen)

bool	x11AppDefaultVisual (int screen)

int	x11AppDepth (int screen)

Display *	x11AppDisplay ()

int	x11AppDpiX (int screen)

int	x11AppDpiY (int screen)

Qt::HANDLE	x11AppRootWindow (int screen)

int	x11AppScreen ()

void *	x11AppVisual (int screen)

void	x11SetAppDpiX (int dpi, int screen)

void	x11SetAppDpiY (int dpi, int screen)

Public Attributes inherited from QGraphicsView
typedef	CacheMode

typedef	OptimizationFlags

Public Attributes inherited from QWidget
typedef	RenderFlags

Static Protected Member Functions inherited from QObject
QByteArray	normalizeSignalSlot (const char *signalSlot)

Properties inherited from QGraphicsView
	alignment

	backgroundBrush

	cacheMode

	dragMode

	foregroundBrush

	interactive

	optimizationFlags

	renderHints

	resizeAnchor

	rubberBandSelectionMode

	sceneRect

	transformationAnchor

	viewportUpdateMode

Properties inherited from QAbstractScrollArea
	horizontalScrollBarPolicy

	verticalScrollBarPolicy

Properties inherited from QFrame
	frameRect

	frameShadow

	frameShape

	frameWidth

	lineWidth

	midLineWidth

Properties inherited from QWidget
	acceptDrops

	accessibleDescription

	accessibleName

	autoFillBackground

	baseSize

	childrenRect

	childrenRegion

	contextMenuPolicy

	cursor

	enabled

	focus

	focusPolicy

	font

	frameGeometry

	frameSize

	fullScreen

	geometry

	height

	inputMethodHints

	isActiveWindow

	layoutDirection

	locale

	maximized

	maximumHeight

	maximumSize

	maximumWidth

	minimized

	minimumHeight

	minimumSize

	minimumSizeHint

	minimumWidth

	modal

	mouseTracking

	normalGeometry

	palette

	pos

	rect

	size

	sizeHint

	sizeIncrement

	sizePolicy

	statusTip

	styleSheet

	toolTip

	updatesEnabled

	visible

	whatsThis

	width

	windowFilePath

	windowFlags

	windowIcon

	windowIconText

	windowModality

	windowModified

	windowOpacity

	windowTitle

	x

	y

Properties inherited from QObject
	objectName

Detailed Description

Map canvas is a class for displaying all GIS data types on a canvas.

Definition at line 109 of file qgsmapcanvas.h.

Member Enumeration Documentation

◆ WheelAction

enum QgsMapCanvas::WheelAction

Enumerator
WheelZoom
WheelZoomAndRecenter
WheelZoomToMouseCursor
WheelNothing

Definition at line 116 of file qgsmapcanvas.h.

Constructor & Destructor Documentation

◆ QgsMapCanvas()

QgsMapCanvas::QgsMapCanvas	(	QWidget *	parent = `nullptr`,
		const char *	name = `nullptr`
	)

Constructor.

Definition at line 191 of file qgsmapcanvas.cpp.

◆ ~QgsMapCanvas()

QgsMapCanvas::~QgsMapCanvas ( )

Destructor.

Definition at line 290 of file qgsmapcanvas.cpp.

Member Function Documentation

◆ antiAliasingEnabled()

bool QgsMapCanvas::antiAliasingEnabled ( ) const

inline

true if antialising is enabled

Definition at line 372 of file qgsmapcanvas.h.

◆ canvasColor()

QColor QgsMapCanvas::canvasColor ( ) const

virtual

Read property of QColor bgColor.

Definition at line 1745 of file qgsmapcanvas.cpp.

◆ canvasPaintDevice()

QPaintDevice & QgsMapCanvas::canvasPaintDevice ( )

Accessor for the canvas paint device.

Deprecated:: since 2.4

Definition at line 1804 of file qgsmapcanvas.cpp.

◆ center()

QgsPoint QgsMapCanvas::center ( ) const

Get map center, in geographical coordinates.

Note: added in 2.8

Definition at line 1018 of file qgsmapcanvas.cpp.

◆ clear()

void QgsMapCanvas::clear ( )

Clear the map canvas.

Deprecated:: since 2.4 - use refresh() - clear does the same thing

Definition at line 1056 of file qgsmapcanvas.cpp.

◆ clearCache()

void QgsMapCanvas::clearCache ( )

Make sure to remove any rendered images from cache (does nothing if cache is not enabled)

Note: added in 2.4

Definition at line 629 of file qgsmapcanvas.cpp.

◆ clearExtentHistory()

void QgsMapCanvas::clearExtentHistory ( )

Definition at line 1113 of file qgsmapcanvas.cpp.

◆ currentLayer()

QgsMapLayer * QgsMapCanvas::currentLayer ( )

returns current layer (set by legend widget)

Definition at line 666 of file qgsmapcanvas.cpp.

◆ currentLayerChanged

void QgsMapCanvas::currentLayerChanged ( QgsMapLayer * layer )

signal

Emitted when the current layer is changed.

Note: added in 2.8

◆ destinationCrsChanged

void QgsMapCanvas::destinationCrsChanged ( )

signal

Emitted when map CRS has changed.

Note: added in 2.4

◆ dragEnterEvent()

void QgsMapCanvas::dragEnterEvent ( QDragEnterEvent * e )

overrideprotectedvirtual

Overridden drag enter event.

Reimplemented from QGraphicsView.

Definition at line 2141 of file qgsmapcanvas.cpp.

◆ enableAntiAliasing()

void QgsMapCanvas::enableAntiAliasing ( bool theFlag )

used to determine if anti-aliasing is enabled or not

Definition at line 350 of file qgsmapcanvas.cpp.

◆ enableMapTileRendering()

void QgsMapCanvas::enableMapTileRendering ( bool theFlag )

sets map tile rendering flag

Definition at line 358 of file qgsmapcanvas.cpp.

◆ enableOverviewMode()

void QgsMapCanvas::enableOverviewMode ( QgsMapOverviewCanvas * overview )

Definition at line 513 of file qgsmapcanvas.cpp.

◆ enableRotation

void QgsMapCanvas::enableRotation ( bool enabled )

staticslot

change canvas rotation support

Note: added in 2.8

Definition at line 2181 of file qgsmapcanvas.cpp.

◆ expressionContextScope() [1/2]

QgsExpressionContextScope& QgsMapCanvas::expressionContextScope ( )

inline

Returns a reference to the expression context scope for the map canvas.

This scope is injected into the expression context used for rendering the map, and can be used to apply specific variable overrides for expression evaluation for the map canvas render.

Note: added in QGIS 2.12

See also: setExpressionContextScope()

Definition at line 455 of file qgsmapcanvas.h.

◆ expressionContextScope() [2/2]

const QgsExpressionContextScope& QgsMapCanvas::expressionContextScope ( ) const

inline

Returns a const reference to the expression context scope for the map canvas.

Note: added in QGIS 2.12

See also: setExpressionContextScope()

Note: not available in python bindings

Definition at line 462 of file qgsmapcanvas.h.

◆ extent()

QgsRectangle QgsMapCanvas::extent ( ) const

Returns the current zoom exent of the map canvas.

Definition at line 939 of file qgsmapcanvas.cpp.

◆ extentsChanged

void QgsMapCanvas::extentsChanged ( )

signal

Emitted when the extents of the map change.

◆ freeze()

void QgsMapCanvas::freeze ( bool frz = true )

Freeze/thaw the map canvas.

This is used to prevent the canvas from responding to events while layers are being added/removed etc.

Parameters

frz	Boolean specifying if the canvas should be frozen (true) or thawed (false). Default is true.

TODO remove in QGIS 3

Definition at line 1793 of file qgsmapcanvas.cpp.

◆ fullExtent()

QgsRectangle QgsMapCanvas::fullExtent ( ) const

Returns the combined exent for all layers on the map canvas.

Definition at line 944 of file qgsmapcanvas.cpp.

◆ getCoordinateTransform()

const QgsMapToPixel * QgsMapCanvas::getCoordinateTransform ( )

Get the current coordinate transform.

Definition at line 418 of file qgsmapcanvas.cpp.

◆ getDatumTransformInfo

void QgsMapCanvas::getDatumTransformInfo	(	const QgsMapLayer *	ml,
		const QString &	srcAuthId,
		const QString &	destAuthId
	)

slot

ask user about datum transformation

Ask user which datum transform to use.

Definition at line 2049 of file qgsmapcanvas.cpp.

◆ hasCrsTransformEnabled

bool QgsMapCanvas::hasCrsTransformEnabled ( )

slot

A simple helper method to find out if on the fly projections are enabled or not.

Definition at line 1124 of file qgsmapcanvas.cpp.

◆ hasCrsTransformEnabledChanged

void QgsMapCanvas::hasCrsTransformEnabledChanged ( bool flag )

signal

Emitted when on-the-fly projection has been turned on/off.

Note: added in 2.4

◆ isCachingEnabled()

bool QgsMapCanvas::isCachingEnabled ( ) const

Check whether images of rendered layers are curerently being cached.

Note: added in 2.4

Definition at line 624 of file qgsmapcanvas.cpp.

◆ isDirty()

bool QgsMapCanvas::isDirty ( ) const

Return the state of the canvas (dirty or not)

Deprecated:: since 2.4 - dirty flag is not kept anymore - always returns false

Definition at line 406 of file qgsmapcanvas.cpp.

◆ isDrawing()

bool QgsMapCanvas::isDrawing ( )

Find out whether rendering is in progress.

Definition at line 411 of file qgsmapcanvas.cpp.

◆ isFrozen()

bool QgsMapCanvas::isFrozen ( )

Accessor for frozen status of canvas.

TODO remove in QGIS 3

Definition at line 1798 of file qgsmapcanvas.cpp.

◆ isParallelRenderingEnabled()

bool QgsMapCanvas::isParallelRenderingEnabled ( ) const

Check whether the layers are rendered in parallel or sequentially.

Note: added in 2.4

Definition at line 640 of file qgsmapcanvas.cpp.

◆ keyPressed

void QgsMapCanvas::keyPressed ( QKeyEvent * e )

signal

Emit key press event.

◆ keyPressEvent()

void QgsMapCanvas::keyPressEvent ( QKeyEvent * e )

overrideprotectedvirtual

Overridden key press event.

Reimplemented from QGraphicsView.

Definition at line 1233 of file qgsmapcanvas.cpp.

◆ keyReleased

void QgsMapCanvas::keyReleased ( QKeyEvent * e )

signal

Emit key release event.

◆ keyReleaseEvent()

void QgsMapCanvas::keyReleaseEvent ( QKeyEvent * e )

overrideprotectedvirtual

Overridden key release event.

Reimplemented from QGraphicsView.

Definition at line 1327 of file qgsmapcanvas.cpp.

◆ labelingResults()

const QgsLabelingResults * QgsMapCanvas::labelingResults ( ) const

Get access to the labeling results (may be null)

Note: added in 2.4

Definition at line 597 of file qgsmapcanvas.cpp.

◆ layer()

QgsMapLayer * QgsMapCanvas::layer ( int index )

return the map layer at position index in the layer stack

Definition at line 379 of file qgsmapcanvas.cpp.

◆ layerCount()

int QgsMapCanvas::layerCount ( ) const

return number of layers on the map

Definition at line 1755 of file qgsmapcanvas.cpp.

◆ layerCrsChange

void QgsMapCanvas::layerCrsChange ( )

slot

This slot is connected to the layer's CRS change.

Definition at line 1782 of file qgsmapcanvas.cpp.

◆ layers()

QList< QgsMapLayer * > QgsMapCanvas::layers ( ) const

return list of layers within map canvas.

Definition at line 1761 of file qgsmapcanvas.cpp.

◆ layersChanged

void QgsMapCanvas::layersChanged ( )

signal

Emitted when a new set of layers has been received.

◆ layerStateChange

void QgsMapCanvas::layerStateChange ( )

slot

This slot is connected to the visibility change of one or more layers.

Definition at line 1774 of file qgsmapcanvas.cpp.

◆ layerStyleOverrides()

QMap< QString, QString > QgsMapCanvas::layerStyleOverrides ( ) const

Getter for stored overrides of styles for layers.

Note: added in 2.12

Definition at line 1838 of file qgsmapcanvas.cpp.

◆ layerStyleOverridesChanged

void QgsMapCanvas::layerStyleOverridesChanged ( )

signal

Emitted when the configuration of overridden layer styles changes.

Note: added in 2.12

◆ magnificationChanged

void QgsMapCanvas::magnificationChanged ( double )

signal

Emitted when the scale of the map changes.

Note: added in 2.16

◆ magnificationFactor()

double QgsMapCanvas::magnificationFactor ( ) const

Returns the magnification factor.

Note: added in 2.16

Definition at line 345 of file qgsmapcanvas.cpp.

◆ map()

QgsMapCanvasMap * QgsMapCanvas::map ( )

Deprecated:: since 2.4 - there could be more than just one "map" items

Definition at line 368 of file qgsmapcanvas.cpp.

◆ mapCanvasRefreshed

void QgsMapCanvas::mapCanvasRefreshed ( )

signal

Emitted when canvas finished a refresh request.

◆ mapRenderer()

QgsMapRenderer * QgsMapCanvas::mapRenderer ( )

Deprecated:: since 2.4 - use mapSettings() for anything related to current renderer settings / SIP: removed /Transfer/ because it crashes after few calls to iface.mapCanvas().mapRenderer().hasCrsTransformEnabled() / and in fact there is no transfer of ownership from c++ to python! / Actually the problem comes from the fact that "hasCrsTransformEnabled" is both a signal and a normal method / /KeepReference/ is necessary because otherwise mapRenderer().hasCrsTransformEnabled() was crashing

Definition at line 373 of file qgsmapcanvas.cpp.

◆ mapSettings()

const QgsMapSettings & QgsMapCanvas::mapSettings ( ) const

Get access to properties used for map rendering.

Note: added in 2.4

Definition at line 538 of file qgsmapcanvas.cpp.

◆ mapTool()

QgsMapTool * QgsMapCanvas::mapTool ( )

Returns the currently active tool.

Definition at line 1897 of file qgsmapcanvas.cpp.

◆ mapToolSet [1/2]

void QgsMapCanvas::mapToolSet ( QgsMapTool * tool )

signal

Emit map tool changed event.

◆ mapToolSet [2/2]

void QgsMapCanvas::mapToolSet	(	QgsMapTool *	newTool,
		QgsMapTool *	oldTool
	)

signal

Emit map tool changed with the old tool.

Note: added in 2.3

◆ mapUnits()

QGis::UnitType QgsMapCanvas::mapUnits ( ) const

Get the current canvas map units.

Definition at line 1833 of file qgsmapcanvas.cpp.

◆ mapUnitsChanged

void QgsMapCanvas::mapUnitsChanged ( )

signal

Emitted when map units are changed.

Note: added in 2.4

◆ mapUnitsPerPixel()

double QgsMapCanvas::mapUnitsPerPixel ( ) const

Returns the mapUnitsPerPixel (map units per pixel) for the canvas.

Definition at line 1811 of file qgsmapcanvas.cpp.

◆ mapUpdateInterval()

int QgsMapCanvas::mapUpdateInterval ( ) const

Find out how often map preview should be updated while it is being rendered (in milliseconds)

Note: added in 2.4

Definition at line 650 of file qgsmapcanvas.cpp.

◆ messageEmitted

void QgsMapCanvas::messageEmitted	(	const QString &	title,
		const QString &	message,
		QgsMessageBar::MessageLevel	= `QgsMessageBar::INFO`
	)

signal

emit a message (usually to be displayed in a message bar)

◆ mouseDoubleClickEvent()

void QgsMapCanvas::mouseDoubleClickEvent ( QMouseEvent * e )

overrideprotectedvirtual

Overridden mouse double click event.

Reimplemented from QGraphicsView.

Definition at line 1359 of file qgsmapcanvas.cpp.

◆ mouseLastXY()

QPoint QgsMapCanvas::mouseLastXY ( )

returns last position of mouse cursor

Definition at line 1943 of file qgsmapcanvas.cpp.

◆ mouseMoveEvent()

void QgsMapCanvas::mouseMoveEvent ( QMouseEvent * e )

overrideprotectedvirtual

Overridden mouse move event.

Reimplemented from QGraphicsView.

Definition at line 1638 of file qgsmapcanvas.cpp.

◆ mousePressEvent()

void QgsMapCanvas::mousePressEvent ( QMouseEvent * e )

overrideprotectedvirtual

Overridden mouse press event.

Reimplemented from QGraphicsView.

Definition at line 1414 of file qgsmapcanvas.cpp.

◆ mouseReleaseEvent()

void QgsMapCanvas::mouseReleaseEvent ( QMouseEvent * e )

overrideprotectedvirtual

Overridden mouse release event.

Reimplemented from QGraphicsView.

Definition at line 1453 of file qgsmapcanvas.cpp.

◆ moveCanvasContents()

void QgsMapCanvas::moveCanvasContents ( bool reset = false )

protected

called when panning is in action, reset indicates end of panning

Definition at line 1929 of file qgsmapcanvas.cpp.

◆ paintEvent()

void QgsMapCanvas::paintEvent ( QPaintEvent * e )

overrideprotectedvirtual

Overridden paint event.

Reimplemented from QGraphicsView.

Definition at line 1529 of file qgsmapcanvas.cpp.

◆ panAction()

void QgsMapCanvas::panAction ( QMouseEvent * event )

Called when mouse is moving and pan is activated.

Definition at line 1921 of file qgsmapcanvas.cpp.

◆ panActionEnd()

void QgsMapCanvas::panActionEnd ( QPoint releasePoint )

Ends pan action and redraws the canvas.

Definition at line 1902 of file qgsmapcanvas.cpp.

◆ panToSelected()

void QgsMapCanvas::panToSelected ( QgsVectorLayer * layer = nullptr )

Pan to the selected features of current (vector) layer keeping same extent.

Definition at line 1210 of file qgsmapcanvas.cpp.

◆ previewMode()

QgsPreviewEffect::PreviewMode QgsMapCanvas::previewMode ( ) const

Returns the current preview mode for the map canvas.

This setting only has an effect if previewModeEnabled is true.

Returns: preview mode for map canvas

See also: setPreviewMode; previewModeEnabled

Note: added in 2.3

Definition at line 1978 of file qgsmapcanvas.cpp.

◆ previewModeEnabled()

bool QgsMapCanvas::previewModeEnabled ( ) const

Returns whether a preview mode is enabled for the map canvas.

Returns: true if a preview mode is currently enabled

See also: setPreviewModeEnabled; previewMode

Note: added in 2.3

Definition at line 1958 of file qgsmapcanvas.cpp.

◆ readProject

void QgsMapCanvas::readProject ( const QDomDocument & doc )

slot

called to read map canvas settings from project

Definition at line 2004 of file qgsmapcanvas.cpp.

◆ refresh

void QgsMapCanvas::refresh ( )

slot

Repaints the canvas map.

Definition at line 672 of file qgsmapcanvas.cpp.

◆ refreshAllLayers()

void QgsMapCanvas::refreshAllLayers ( )

Reload all layers, clear the cache and refresh the canvas.

Note: added in 2.9

Definition at line 2186 of file qgsmapcanvas.cpp.

◆ renderComplete

void QgsMapCanvas::renderComplete ( QPainter * )

signal

Emitted when the canvas has rendered.

Passes a pointer to the painter on which the map was drawn. This is useful for plugins that wish to draw on the map after it has been rendered. Passing the painter allows plugins to work when the map is being rendered onto a pixmap other than the mapCanvas own pixmap member.TODO: deprecate when decorations are reimplemented as map canvas items

anything related to rendering progress is not visible outside of map canvas
additional drawing shall be done directly within the renderer job or independently as a map canvas item

◆ renderFlag

bool QgsMapCanvas::renderFlag ( )

inlineslot

State of render suppression flag.

Definition at line 491 of file qgsmapcanvas.h.

◆ renderStarting

void QgsMapCanvas::renderStarting ( )

signal

Emitted when the canvas is about to be rendered.

◆ resizeEvent()

void QgsMapCanvas::resizeEvent ( QResizeEvent * e )

overrideprotectedvirtual

Overridden resize event.

Reimplemented from QGraphicsView.

Definition at line 1505 of file qgsmapcanvas.cpp.

◆ rotation()

double QgsMapCanvas::rotation ( ) const

Get the current map canvas rotation in clockwise degrees.

Note: added in 2.8

Definition at line 1025 of file qgsmapcanvas.cpp.

◆ rotationChanged

void QgsMapCanvas::rotationChanged ( double )

signal

Emitted when the rotation of the map changes.

Note: added in 2.8

◆ rotationEnabled

bool QgsMapCanvas::rotationEnabled ( )

staticslot

return if canvas rotation is enabled

Note: added in 2.8

Definition at line 2176 of file qgsmapcanvas.cpp.

◆ saveAsImage

void QgsMapCanvas::saveAsImage	(	const QString &	theFileName,
		QPixmap *	QPixmap = `nullptr`,
		const QString &	theFormat = `"PNG"`
	)

slot

Save the convtents of the map canvas to disk as an image.

Definition at line 853 of file qgsmapcanvas.cpp.

◆ scale()

double QgsMapCanvas::scale ( )

Get the last reported scale of the canvas.

Definition at line 395 of file qgsmapcanvas.cpp.

◆ scaleChanged

void QgsMapCanvas::scaleChanged ( double )

signal

Emitted when the scale of the map changes.

◆ scaleLocked()

bool QgsMapCanvas::scaleLocked ( ) const

inline

Returns whether the scale is locked, so zooming can be performed using magnication.

Note: added in 2.16

See also: setScaleLocked()

Definition at line 366 of file qgsmapcanvas.h.

◆ selectionChanged

void QgsMapCanvas::selectionChanged ( QgsMapLayer * layer )

signal

Emitted when selection in any layer gets changed.

◆ selectionChangedSlot

void QgsMapCanvas::selectionChangedSlot ( )

slot

Receives signal about selection change, and pass it on with layer info.

Definition at line 2133 of file qgsmapcanvas.cpp.

◆ setCachingEnabled()

void QgsMapCanvas::setCachingEnabled ( bool enabled )

Set whether to cache images of rendered layers.

Note: added in 2.4

Definition at line 602 of file qgsmapcanvas.cpp.

◆ setCanvasColor()

void QgsMapCanvas::setCanvasColor ( const QColor & theColor )

virtual

Write property of QColor bgColor.

Definition at line 1727 of file qgsmapcanvas.cpp.

◆ setCenter()

void QgsMapCanvas::setCenter ( const QgsPoint & center )

Set the center of the map canvas, in geographical coordinates.

Note: added in 2.8

Definition at line 1004 of file qgsmapcanvas.cpp.

◆ setCrsTransformEnabled()

void QgsMapCanvas::setCrsTransformEnabled ( bool enabled )

sets whether to use projections for this layer set

Note: added in 2.4

Definition at line 543 of file qgsmapcanvas.cpp.

◆ setCurrentLayer()

void QgsMapCanvas::setCurrentLayer ( QgsMapLayer * layer )

Definition at line 389 of file qgsmapcanvas.cpp.

◆ setDestinationCrs()

void QgsMapCanvas::setDestinationCrs ( const QgsCoordinateReferenceSystem & crs )

sets destination coordinate reference system

Note: added in 2.4

Definition at line 557 of file qgsmapcanvas.cpp.

◆ setDirty()

void QgsMapCanvas::setDirty ( bool _dirty )

Flag the canvas as dirty and needed a refresh.

Deprecated:: since 2.4 - use refresh() to trigger a refresh (clients should not decide explicitly whether canvas is dirty or not)

Definition at line 400 of file qgsmapcanvas.cpp.

◆ setExpressionContextScope()

void QgsMapCanvas::setExpressionContextScope ( const QgsExpressionContextScope & scope )

inline

Sets an expression context scope for the map canvas.

This scope is injected into the expression context used for rendering the map, and can be used to apply specific variable overrides for expression evaluation for the map canvas render. This method will overwrite the existing expression context scope for the canvas.

Parameters

scope new expression context scope

Note: added in QGIS 2.12

See also: expressionContextScope()

Definition at line 447 of file qgsmapcanvas.h.

◆ setExtent()

void QgsMapCanvas::setExtent	(	const QgsRectangle &	r,
		bool	magnified = `false`
	)

Set the extent of the map canvas.

Definition at line 950 of file qgsmapcanvas.cpp.

◆ setLayerSet()

void QgsMapCanvas::setLayerSet ( QList< QgsMapCanvasLayer > & layers )

Definition at line 423 of file qgsmapcanvas.cpp.

◆ setLayerStyleOverrides()

void QgsMapCanvas::setLayerStyleOverrides ( const QMap< QString, QString > & overrides )

Setter for stored overrides of styles for layers.

Note: added in 2.12

Definition at line 1843 of file qgsmapcanvas.cpp.

◆ setMagnificationFactor

void QgsMapCanvas::setMagnificationFactor ( double factor )

slot

Sets the factor of magnification to apply to the map canvas.

Indeed, we increase/decrease the DPI of the map settings according to this factor in order to render marker point, labels, ... bigger.

Note: added in 2.16

Definition at line 329 of file qgsmapcanvas.cpp.

◆ setMapTool()

void QgsMapCanvas::setMapTool ( QgsMapTool * mapTool )

Sets the map tool currently being used on the canvas.

Definition at line 1671 of file qgsmapcanvas.cpp.

◆ setMapUnits()

void QgsMapCanvas::setMapUnits ( QGis::UnitType mapUnits )

Set map units (needed by project properties dialog)

Definition at line 1817 of file qgsmapcanvas.cpp.

◆ setMapUpdateInterval()

void QgsMapCanvas::setMapUpdateInterval ( int timeMilliseconds )

Set how often map preview should be updated while it is being rendered (in milliseconds)

Note: added in 2.4

Definition at line 645 of file qgsmapcanvas.cpp.

◆ setParallelRenderingEnabled()

void QgsMapCanvas::setParallelRenderingEnabled ( bool enabled )

Set whether the layers are rendered in parallel or sequentially.

Note: added in 2.4

Definition at line 635 of file qgsmapcanvas.cpp.

◆ setPreviewMode()

void QgsMapCanvas::setPreviewMode ( QgsPreviewEffect::PreviewMode mode )

Sets a preview mode for the map canvas.

This setting only has an effect if previewModeEnabled is true.

Parameters

mode	preview mode for the canvas

See also: previewMode; setPreviewModeEnabled; previewModeEnabled

Note: added in 2.3

Definition at line 1968 of file qgsmapcanvas.cpp.

◆ setPreviewModeEnabled()

void QgsMapCanvas::setPreviewModeEnabled ( bool previewEnabled )

Enables a preview mode for the map canvas.

Parameters

previewEnabled set to true to enable a preview mode

See also: setPreviewMode

Note: added in 2.3

Definition at line 1948 of file qgsmapcanvas.cpp.

◆ setProgress

Q_DECL_DEPRECATED void QgsMapCanvas::setProgress	(	int	,
		int
	)

signal

Let the owner know how far we are with render operations.

Deprecated:: since 2.4 - already unused in 2.0 anyway

◆ setRenderFlag

void QgsMapCanvas::setRenderFlag ( bool theFlag )

slot

Whether to suppress rendering or not.

Definition at line 1853 of file qgsmapcanvas.cpp.

◆ setRotation()

void QgsMapCanvas::setRotation ( double degrees )

Set the rotation of the map canvas in clockwise degrees.

Note: added in 2.8

Definition at line 1030 of file qgsmapcanvas.cpp.

◆ setScaleLocked

void QgsMapCanvas::setScaleLocked ( bool isLocked )

slot

Lock the scale, so zooming can be performed using magnication.

Note: added in 2.16

See also: scaleLocked()

Definition at line 1633 of file qgsmapcanvas.cpp.

◆ setSegmentationTolerance()

void QgsMapCanvas::setSegmentationTolerance ( double tolerance )

Sets the segmentation tolerance applied when rendering curved geometries.

Parameters

tolerance the segmentation tolerance

Definition at line 2203 of file qgsmapcanvas.cpp.

◆ setSegmentationToleranceType()

void QgsMapCanvas::setSegmentationToleranceType ( QgsAbstractGeometryV2::SegmentationToleranceType type )

Sets segmentation tolerance type (maximum angle or maximum difference between curve and approximation)

Parameters

type	the segmentation tolerance typename

Definition at line 2208 of file qgsmapcanvas.cpp.

◆ setSelectionColor()

void QgsMapCanvas::setSelectionColor ( const QColor & color )

Set color of selected vector features.

Note: added in 2.4

Definition at line 1750 of file qgsmapcanvas.cpp.

◆ setSnappingUtils()

void QgsMapCanvas::setSnappingUtils ( QgsSnappingUtils * utils )

Assign an instance of snapping utils to the map canvas.

The instance is not owned by the canvas, so it is possible to use one instance in multiple canvases.

For main canvas in QGIS, do not associate a different instance from the existing one (it is updated from the project's snapping configuration).

Note: added in 2.8

Definition at line 1999 of file qgsmapcanvas.cpp.

◆ setWheelAction()

void QgsMapCanvas::setWheelAction	(	WheelAction	action,
		double	factor = `2`
	)

set wheel action and zoom factor (should be greater than 1)

Deprecated:: No more options for wheel action

Definition at line 1586 of file qgsmapcanvas.cpp.

◆ setWheelFactor()

void QgsMapCanvas::setWheelFactor ( double factor )

set wheel zoom factor (should be greater than 1)

Definition at line 1592 of file qgsmapcanvas.cpp.

◆ showError

void QgsMapCanvas::showError ( QgsMapLayer * mapLayer )

slot

Deprecated:: since 2.4 - does nothing - errors are reported by different means

Definition at line 1938 of file qgsmapcanvas.cpp.

◆ snappingUtils()

QgsSnappingUtils * QgsMapCanvas::snappingUtils ( ) const

Return snapping utility class that is associated with map canvas.

If no snapping utils instance has been associated previously, an internal will be created for convenience (so map tools do not need to test for existence of the instance).

Main canvas in QGIS returns an instance which is always up-to-date with the project's snapping configuration.

Note: added in 2.8

Definition at line 1988 of file qgsmapcanvas.cpp.

◆ stopRendering

void QgsMapCanvas::stopRendering ( )

slot

stop rendering (if there is any right now)

Note: added in 2.4

Definition at line 835 of file qgsmapcanvas.cpp.

◆ unsetMapTool()

void QgsMapCanvas::unsetMapTool ( QgsMapTool * mapTool )

Unset the current map tool or last non zoom tool.

This is called from destructor of map tools to make sure that this map tool won't be used any more. You don't have to call it manualy, QgsMapTool takes care of it.

Definition at line 1709 of file qgsmapcanvas.cpp.

◆ updateCanvasItemPositions()

void QgsMapCanvas::updateCanvasItemPositions ( )

protected

called on resize or changed extent to notify canvas items to change their rectangle

Definition at line 1536 of file qgsmapcanvas.cpp.

◆ updateDatumTransformEntries()

void QgsMapCanvas::updateDatumTransformEntries ( )

protected

Make sure the datum transform store is properly populated.

Definition at line 1873 of file qgsmapcanvas.cpp.

◆ updateFullExtent()

Q_DECL_DEPRECATED void QgsMapCanvas::updateFullExtent ( )

inline

Updates the full extent.

Deprecated:: since v2.4 - does nothing

Definition at line 287 of file qgsmapcanvas.h.

◆ updateMap

void QgsMapCanvas::updateMap ( )

slot

Deprecated:: in 2.4 - does nothing - kept for API compatibility

Definition at line 848 of file qgsmapcanvas.cpp.

◆ updateOverview()

void QgsMapCanvas::updateOverview ( )

Definition at line 656 of file qgsmapcanvas.cpp.

◆ updateScale()

void QgsMapCanvas::updateScale ( )

Emits signal scaleChanged to update scale in main window.

Definition at line 1050 of file qgsmapcanvas.cpp.

◆ useImageToRender()

void QgsMapCanvas::useImageToRender ( bool theFlag )

Select which Qt class to render with.

Deprecated:: since 2.4 - does nothing because now we always render to QImage

Definition at line 363 of file qgsmapcanvas.cpp.

◆ wheelEvent()

void QgsMapCanvas::wheelEvent ( QWheelEvent * e )

overrideprotectedvirtual

Overridden mouse wheel event.

Reimplemented from QGraphicsView.

Definition at line 1554 of file qgsmapcanvas.cpp.

◆ writeProject

void QgsMapCanvas::writeProject ( QDomDocument & doc )

slot

called to write map canvas settings to project

Definition at line 2029 of file qgsmapcanvas.cpp.

◆ xyCoordinates

void QgsMapCanvas::xyCoordinates ( const QgsPoint & p )

signal

Emits current mouse position.

Note: changed in 1.3

◆ zoomByFactor()

void QgsMapCanvas::zoomByFactor	(	double	scaleFactor,
		const QgsPoint *	center = `nullptr`
	)

Zoom with the factor supplied.

Factor > 1 zooms out, interval (0,1) zooms in If point is given, re-center on it

Definition at line 2117 of file qgsmapcanvas.cpp.

◆ zoomIn

void QgsMapCanvas::zoomIn ( )

slot

Zoom in with fixed factor.

Definition at line 1597 of file qgsmapcanvas.cpp.

◆ zoomLastStatusChanged

void QgsMapCanvas::zoomLastStatusChanged ( bool )

signal

Emitted when zoom last status changed.

◆ zoomNextStatusChanged

void QgsMapCanvas::zoomNextStatusChanged ( bool )

signal

Emitted when zoom next status changed.

◆ zoomOut

void QgsMapCanvas::zoomOut ( )

slot

Zoom out with fixed factor.

Definition at line 1603 of file qgsmapcanvas.cpp.

◆ zoomScale()

void QgsMapCanvas::zoomScale ( double scale )

Zoom to a specific scale.

Definition at line 1609 of file qgsmapcanvas.cpp.

◆ zoomToFeatureExtent()

void QgsMapCanvas::zoomToFeatureExtent ( QgsRectangle & rect )

protected

Zooms to feature extent.

Adds a small margin around the extent and does a pan if rect is empty (point extent)

Definition at line 1144 of file qgsmapcanvas.cpp.

◆ zoomToFeatureIds()

void QgsMapCanvas::zoomToFeatureIds	(	QgsVectorLayer *	layer,
		const QgsFeatureIds &	ids
	)

Set canvas extent to the bounding box of a set of features.

Parameters

layer	the vector layer
ids	the feature ids

Definition at line 1168 of file qgsmapcanvas.cpp.

◆ zoomToFullExtent()

void QgsMapCanvas::zoomToFullExtent ( )

Zoom to the full extent of all layers.

Definition at line 1062 of file qgsmapcanvas.cpp.

◆ zoomToNextExtent()

void QgsMapCanvas::zoomToNextExtent ( )

Zoom to the next extent (view)

Definition at line 1096 of file qgsmapcanvas.cpp.

◆ zoomToPreviousExtent()

void QgsMapCanvas::zoomToPreviousExtent ( )

Zoom to the previous extent (view)

Definition at line 1078 of file qgsmapcanvas.cpp.

◆ zoomToSelected()

void QgsMapCanvas::zoomToSelected ( QgsVectorLayer * layer = nullptr )

Zoom to the extent of the selected features of current (vector) layer.

Parameters

layer optionally specify different than current layer

Definition at line 1129 of file qgsmapcanvas.cpp.

◆ zoomWithCenter()

void QgsMapCanvas::zoomWithCenter	(	int	x,
		int	y,
		bool	zoomIn
	)

Zooms in/out with a given center.

Definition at line 1614 of file qgsmapcanvas.cpp.

Friends And Related Function Documentation

◆ TestQgsMapCanvas

friend class TestQgsMapCanvas

friend

Definition at line 816 of file qgsmapcanvas.h.

Member Data Documentation

◆ mCanvasProperties

QScopedPointer<CanvasProperties> QgsMapCanvas::mCanvasProperties

protected

Handle pattern for implementation object.

Definition at line 691 of file qgsmapcanvas.h.

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

/tmp/buildd/qgis-2.18.21+99unstable/src/gui/qgsmapcanvas.h
/tmp/buildd/qgis-2.18.21+99unstable/src/gui/qgsmapcanvas.cpp

Classes

Public Types

Public Slots

Signals

Public Member Functions

Protected Member Functions

Protected Attributes

Friends

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ WheelAction

Constructor & Destructor Documentation

◆ QgsMapCanvas()

◆ ~QgsMapCanvas()

Member Function Documentation

◆ antiAliasingEnabled()

◆ canvasColor()

◆ canvasPaintDevice()

◆ center()

◆ clear()

◆ clearCache()

◆ clearExtentHistory()

◆ currentLayer()

◆ currentLayerChanged

◆ destinationCrsChanged

◆ dragEnterEvent()

◆ enableAntiAliasing()

◆ enableMapTileRendering()

◆ enableOverviewMode()

◆ enableRotation

◆ expressionContextScope() [1/2]

◆ expressionContextScope() [2/2]

◆ extent()

◆ extentsChanged

◆ freeze()

◆ fullExtent()

◆ getCoordinateTransform()

◆ getDatumTransformInfo

◆ hasCrsTransformEnabled

◆ hasCrsTransformEnabledChanged

◆ isCachingEnabled()

◆ isDirty()

◆ isDrawing()

◆ isFrozen()

◆ isParallelRenderingEnabled()

◆ keyPressed

◆ keyPressEvent()

◆ keyReleased

◆ keyReleaseEvent()

◆ labelingResults()

◆ layer()

◆ layerCount()

◆ layerCrsChange

◆ layers()

◆ layersChanged

◆ layerStateChange

◆ layerStyleOverrides()

◆ layerStyleOverridesChanged

◆ magnificationChanged

◆ magnificationFactor()

◆ map()

◆ mapCanvasRefreshed

◆ mapRenderer()

◆ mapSettings()

◆ mapTool()

◆ mapToolSet [1/2]

◆ mapToolSet [2/2]

◆ mapUnits()

◆ mapUnitsChanged

◆ mapUnitsPerPixel()

◆ mapUpdateInterval()

◆ messageEmitted

◆ mouseDoubleClickEvent()

◆ mouseLastXY()

◆ mouseMoveEvent()

◆ mousePressEvent()

◆ mouseReleaseEvent()

◆ moveCanvasContents()

◆ paintEvent()