QGIS API Documentation
3.16.0-Hannover (43b64b13f3)
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Represents a map layer containing a set of georeferenced annotations, e.g. More...
#include <qgsannotationlayer.h>
Classes | |
struct | LayerOptions |
Setting options for loading annotation layers. More... | |
Public Member Functions | |
QgsAnnotationLayer (const QString &name, const QgsAnnotationLayer::LayerOptions &options) | |
Constructor for a new QgsAnnotationLayer with the specified layer name. More... | |
~QgsAnnotationLayer () override | |
QString | addItem (QgsAnnotationItem *item) |
Adds an item to the layer. More... | |
void | clear () |
Removes all items from the layer. More... | |
QgsAnnotationLayer * | clone () const override |
Returns a new instance equivalent to this one except for the id which is still unique. More... | |
QgsMapLayerRenderer * | createMapRenderer (QgsRenderContext &rendererContext) override |
Returns new instance of QgsMapLayerRenderer that will be used for rendering of given context. More... | |
QgsRectangle | extent () const override |
Returns the extent of the layer. More... | |
bool | isEmpty () const |
Returns true if the annotation layer is empty and contains no annotations. More... | |
QMap< QString, QgsAnnotationItem * > | items () const |
Returns a map of items contained in the layer, by unique item ID. More... | |
double | opacity () const |
Returns the opacity for the annotation layer, where opacity is a value between 0 (totally transparent) and 1.0 (fully opaque). More... | |
bool | readSymbology (const QDomNode &node, QString &errorMessage, QgsReadWriteContext &context, StyleCategories categories=AllStyleCategories) override |
Read the symbology for the current layer from the DOM node supplied. More... | |
bool | readXml (const QDomNode &layerNode, QgsReadWriteContext &context) override |
Called by readLayerXML(), used by children to read state specific to them from project files. More... | |
bool | removeItem (const QString &id) |
Removes (and deletes) the item with matching id. More... | |
void | reset () |
Resets the annotation layer to a default state, and clears all items from it. More... | |
void | setOpacity (double opacity) |
Sets the opacity for the annotation layer, where opacity is a value between 0 (totally transparent) and 1.0 (fully opaque). More... | |
void | setTransformContext (const QgsCoordinateTransformContext &context) override |
Sets the coordinate transform context to transformContext. More... | |
bool | writeSymbology (QDomNode &node, QDomDocument &doc, QString &errorMessage, const QgsReadWriteContext &, StyleCategories categories=AllStyleCategories) const override |
Write the style for the layer into the docment provided. More... | |
bool | writeXml (QDomNode &layer_node, QDomDocument &doc, const QgsReadWriteContext &context) const override |
Called by writeLayerXML(), used by children to write state specific to them to project files. More... | |
Public Member Functions inherited from QgsMapLayer | |
QgsMapLayer (QgsMapLayer const &)=delete | |
QgsMapLayer cannot be copied. More... | |
QgsMapLayer (QgsMapLayerType type=QgsMapLayerType::VectorLayer, const QString &name=QString(), const QString &source=QString()) | |
Constructor for QgsMapLayer. More... | |
~QgsMapLayer () override | |
QString | abstract () const |
Returns the abstract of the layer used by QGIS Server in GetCapabilities request. More... | |
virtual bool | accept (QgsStyleEntityVisitorInterface *visitor) const |
Accepts the specified symbology visitor, causing it to visit all symbols associated with the layer. More... | |
QString | attribution () const |
Returns the attribution of the layer used by QGIS Server in GetCapabilities request. More... | |
QString | attributionUrl () const |
Returns the attribution URL of the layer used by QGIS Server in GetCapabilities request. More... | |
int | autoRefreshInterval () const |
Returns the auto refresh interval (in milliseconds). More... | |
QPainter::CompositionMode | blendMode () const |
Returns the current blending mode for a layer. More... | |
QgsCoordinateReferenceSystem | crs () const |
Returns the layer's spatial reference system. More... | |
const QgsObjectCustomProperties & | customProperties () const |
Read all custom properties from layer. More... | |
Q_INVOKABLE QVariant | customProperty (const QString &value, const QVariant &defaultValue=QVariant()) const |
Read a custom property from layer. More... | |
Q_INVOKABLE QStringList | customPropertyKeys () const |
Returns list of all keys within custom properties. More... | |
virtual QgsDataProvider * | dataProvider () |
Returns the layer's data provider, it may be nullptr . More... | |
virtual const QgsDataProvider * | dataProvider () const |
Returns the layer's data provider in a const-correct manner, it may be nullptr . More... | |
QString | dataUrl () const |
Returns the DataUrl of the layer used by QGIS Server in GetCapabilities request. More... | |
QString | dataUrlFormat () const |
Returns the DataUrl format of the layer used by QGIS Server in GetCapabilities request. More... | |
virtual QSet< QgsMapLayerDependency > | dependencies () const |
Gets the list of dependencies. More... | |
virtual QgsError | error () const |
Gets current status error. More... | |
void | exportNamedMetadata (QDomDocument &doc, QString &errorMsg) const |
Export the current metadata of this layer as named metadata in a QDomDocument. More... | |
virtual void | exportNamedStyle (QDomDocument &doc, QString &errorMsg, const QgsReadWriteContext &context=QgsReadWriteContext(), QgsMapLayer::StyleCategories categories=QgsMapLayer::AllStyleCategories) const |
Export the properties of this layer as named style in a QDomDocument. More... | |
virtual void | exportSldStyle (QDomDocument &doc, QString &errorMsg) const |
Export the properties of this layer as SLD style in a QDomDocument. More... | |
QgsMapLayer::LayerFlags | flags () const |
Returns the flags for this layer. More... | |
bool | hasAutoRefreshEnabled () const |
Returns true if auto refresh is enabled for the layer. More... | |
bool | hasScaleBasedVisibility () const |
Returns whether scale based visibility is enabled for the layer. More... | |
virtual QString | htmlMetadata () const |
Obtain a formatted HTML string containing assorted metadata for this layer. More... | |
QString | id () const |
Returns the layer's unique ID, which is used to access this layer from QgsProject. More... | |
bool | importNamedMetadata (QDomDocument &document, QString &errorMessage) |
Import the metadata of this layer from a QDomDocument. More... | |
virtual bool | importNamedStyle (QDomDocument &doc, QString &errorMsg, QgsMapLayer::StyleCategories categories=QgsMapLayer::AllStyleCategories) |
Import the properties of this layer from a QDomDocument. More... | |
virtual bool | isEditable () const |
Returns true if the layer can be edited. More... | |
bool | isInScaleRange (double scale) const |
Tests whether the layer should be visible at the specified scale. More... | |
bool | isRefreshOnNotifyEnabled () const |
Returns true if the refresh on provider nofification is enabled. More... | |
virtual bool | isSpatial () const |
Returns true if the layer is considered a spatial layer, ie it has some form of geometry associated with it. More... | |
virtual bool | isTemporary () const |
Returns true if the layer is considered a temporary layer. More... | |
bool | isValid () const |
Returns the status of the layer. More... | |
QString | keywordList () const |
Returns the keyword list of the layer used by QGIS Server in GetCapabilities request. More... | |
QgsMapLayerLegend * | legend () const |
Can be nullptr . More... | |
QString | legendUrl () const |
Returns the URL for the layer's legend. More... | |
QString | legendUrlFormat () const |
Returns the format for a URL based layer legend. More... | |
virtual QString | loadDefaultMetadata (bool &resultFlag) |
Retrieve the default metadata for this layer if one exists (either as a .qmd file on disk or as a record in the users metadata table in their personal qgis.db) More... | |
virtual QString | loadDefaultStyle (bool &resultFlag) |
Retrieve the default style for this layer if one exists (either as a .qml file on disk or as a record in the users style table in their personal qgis.db) More... | |
virtual QString | loadNamedMetadata (const QString &uri, bool &resultFlag) |
Retrieve a named metadata for this layer if one exists (either as a .qmd file on disk or as a record in the users style table in their personal qgis.db) More... | |
bool | loadNamedMetadataFromDatabase (const QString &db, const QString &uri, QString &qmd) |
Retrieve a named metadata for this layer from a sqlite database. More... | |
virtual QString | loadNamedStyle (const QString &uri, bool &resultFlag, QgsMapLayer::StyleCategories categories=QgsMapLayer::AllStyleCategories) |
Retrieve a named style for this layer if one exists (either as a .qml file on disk or as a record in the users style table in their personal qgis.db) More... | |
virtual bool | loadNamedStyleFromDatabase (const QString &db, const QString &uri, QString &qml) |
Retrieve a named style for this layer from a sqlite database. More... | |
virtual QString | loadSldStyle (const QString &uri, bool &resultFlag) |
Attempts to style the layer using the formatting from an SLD type file. More... | |
double | maximumScale () const |
Returns the maximum map scale (i.e. More... | |
virtual const QgsLayerMetadata & | metadata () const |
Returns a reference to the layer's metadata store. More... | |
virtual QString | metadataUri () const |
Retrieve the metadata URI for this layer (either as a .qmd file on disk or as a record in the users style table in their personal qgis.db) More... | |
QString | metadataUrl () const |
Returns the metadata URL of the layer used by QGIS Server in GetCapabilities request. More... | |
QString | metadataUrlFormat () const |
Returns the metadata format of the layer used by QGIS Server in GetCapabilities request. More... | |
QString | metadataUrlType () const |
Returns the metadata type of the layer used by QGIS Server in GetCapabilities request. More... | |
double | minimumScale () const |
Returns the minimum map scale (i.e. More... | |
QString | name () const |
Returns the display name of the layer. More... | |
QgsMapLayer & | operator= (QgsMapLayer const &)=delete |
QgsMapLayer cannot be copied. More... | |
QString | originalXmlProperties () const |
Returns the XML properties of the original layer as they were when the layer was first read from the project file. More... | |
QString | providerType () const |
Returns the provider type (provider key) for this layer. More... | |
QString | publicSource () const |
Gets a version of the internal layer definition that has sensitive bits removed (for example, the password). More... | |
bool | readLayerXml (const QDomElement &layerElement, QgsReadWriteContext &context, QgsMapLayer::ReadFlags flags=QgsMapLayer::ReadFlags()) |
Sets state from DOM document. More... | |
bool | readOnly () const |
Returns if this layer is read only. More... | |
virtual bool | readSld (const QDomNode &node, QString &errorMessage) |
virtual bool | readStyle (const QDomNode &node, QString &errorMessage, QgsReadWriteContext &context, StyleCategories categories=AllStyleCategories) |
Read the style for the current layer from the DOM node supplied. More... | |
QString | refreshOnNotifyMessage () const |
Returns the message that should be notified by the provider to triggerRepaint. More... | |
virtual void | reload () |
Synchronises with changes in the datasource. More... | |
void | removeCustomProperty (const QString &key) |
Remove a custom property from layer. More... | |
QgsAbstract3DRenderer * | renderer3D () const |
Returns 3D renderer associated with the layer. More... | |
virtual void | resolveReferences (QgsProject *project) |
Resolve references to other layers (kept as layer IDs after reading XML) into layer objects. More... | |
virtual QString | saveDefaultMetadata (bool &resultFlag) |
Save the current metadata of this layer as the default metadata (either as a .qmd file on disk or as a record in the users style table in their personal qgis.db) More... | |
virtual QString | saveDefaultStyle (bool &resultFlag) |
Save the properties of this layer as the default style (either as a .qml file on disk or as a record in the users style table in their personal qgis.db) More... | |
QString | saveNamedMetadata (const QString &uri, bool &resultFlag) |
Save the current metadata of this layer as a named metadata (either as a .qmd file on disk or as a record in the users style table in their personal qgis.db) More... | |
virtual QString | saveNamedStyle (const QString &uri, bool &resultFlag, StyleCategories categories=AllStyleCategories) |
Save the properties of this layer as a named style (either as a .qml file on disk or as a record in the users style table in their personal qgis.db) More... | |
virtual QString | saveSldStyle (const QString &uri, bool &resultFlag) const |
Saves the properties of this layer to an SLD format file. More... | |
void | setAbstract (const QString &abstract) |
Sets the abstract of the layer used by QGIS Server in GetCapabilities request. More... | |
void | setAttribution (const QString &attrib) |
Sets the attribution of the layer used by QGIS Server in GetCapabilities request. More... | |
void | setAttributionUrl (const QString &attribUrl) |
Sets the attribution URL of the layer used by QGIS Server in GetCapabilities request. More... | |
void | setAutoRefreshEnabled (bool enabled) |
Sets whether auto refresh is enabled for the layer. More... | |
void | setAutoRefreshInterval (int interval) |
Sets the auto refresh interval (in milliseconds) for the layer. More... | |
void | setBlendMode (QPainter::CompositionMode blendMode) |
Set the blending mode used for rendering a layer. More... | |
void | setCrs (const QgsCoordinateReferenceSystem &srs, bool emitSignal=true) |
Sets layer's spatial reference system. More... | |
void | setCustomProperties (const QgsObjectCustomProperties &properties) |
Set custom properties for layer. More... | |
Q_INVOKABLE void | setCustomProperty (const QString &key, const QVariant &value) |
Set a custom property for layer. More... | |
virtual void | setDataSource (const QString &dataSource, const QString &baseName, const QString &provider, const QgsDataProvider::ProviderOptions &options, bool loadDefaultStyleFlag=false) |
Updates the data source of the layer. More... | |
void | setDataUrl (const QString &dataUrl) |
Sets the DataUrl of the layer used by QGIS Server in GetCapabilities request. More... | |
void | setDataUrlFormat (const QString &dataUrlFormat) |
Sets the DataUrl format of the layer used by QGIS Server in GetCapabilities request. More... | |
void | setFlags (QgsMapLayer::LayerFlags flags) |
Returns the flags for this layer. More... | |
void | setKeywordList (const QString &keywords) |
Sets the keyword list of the layer used by QGIS Server in GetCapabilities request. More... | |
virtual void | setLayerOrder (const QStringList &layers) |
Reorders the previously selected sublayers of this layer from bottom to top. More... | |
void | setLegend (QgsMapLayerLegend *legend) |
Assign a legend controller to the map layer. More... | |
void | setLegendUrl (const QString &legendUrl) |
Sets the URL for the layer's legend. More... | |
void | setLegendUrlFormat (const QString &legendUrlFormat) |
Sets the format for a URL based layer legend. More... | |
virtual void | setMetadata (const QgsLayerMetadata &metadata) |
Sets the layer's metadata store. More... | |
void | setMetadataUrl (const QString &metaUrl) |
Sets the metadata URL of the layer used by QGIS Server in GetCapabilities request. More... | |
void | setMetadataUrlFormat (const QString &metaUrlFormat) |
Sets the metadata format of the layer used by QGIS Server in GetCapabilities request. More... | |
void | setMetadataUrlType (const QString &metaUrlType) |
Set the metadata type of the layer used by QGIS Server in GetCapabilities request MetadataUrlType indicates the standard to which the metadata complies. More... | |
void | setName (const QString &name) |
Set the display name of the layer. More... | |
void | setOriginalXmlProperties (const QString &originalXmlProperties) |
Sets the original XML properties for the layer to originalXmlProperties. More... | |
void | setRenderer3D (QgsAbstract3DRenderer *renderer) |
Sets 3D renderer for the layer. More... | |
void | setShortName (const QString &shortName) |
Sets the short name of the layer used by QGIS Server to identify the layer. More... | |
virtual void | setSubLayerVisibility (const QString &name, bool visible) |
Set the visibility of the given sublayer name. More... | |
void | setTitle (const QString &title) |
Sets the title of the layer used by QGIS Server in GetCapabilities request. More... | |
QString | shortName () const |
Returns the short name of the layer used by QGIS Server to identify the layer. More... | |
QString | source () const |
Returns the source for the layer. More... | |
QgsMapLayerStyleManager * | styleManager () const |
Gets access to the layer's style manager. More... | |
virtual QString | styleURI () const |
Retrieve the style URI for this layer (either as a .qml file on disk or as a record in the users style table in their personal qgis.db) More... | |
virtual QStringList | subLayers () const |
Returns the sublayers of this layer. More... | |
virtual QgsMapLayerTemporalProperties * | temporalProperties () |
Returns the layer's temporal properties. More... | |
virtual QDateTime | timestamp () const |
Time stamp of data source in the moment when data/metadata were loaded by provider. More... | |
QString | title () const |
Returns the title of the layer used by QGIS Server in GetCapabilities request. More... | |
QgsCoordinateTransformContext | transformContext () const |
Returns the layer data provider coordinate transform context or a default transform context if the layer does not have a valid data provider. More... | |
QgsMapLayerType | type () const |
Returns the type of the layer. More... | |
QUndoStack * | undoStack () |
Returns pointer to layer's undo stack. More... | |
QUndoStack * | undoStackStyles () |
Returns pointer to layer's style undo stack. More... | |
bool | writeLayerXml (QDomElement &layerElement, QDomDocument &document, const QgsReadWriteContext &context) const |
Stores state in DOM node. More... | |
virtual bool | writeStyle (QDomNode &node, QDomDocument &doc, QString &errorMessage, const QgsReadWriteContext &context, StyleCategories categories=AllStyleCategories) const |
Write just the symbology information for the layer into the document. More... | |
Additional Inherited Members | |
Public Types inherited from QgsMapLayer | |
enum | LayerFlag { Identifiable = 1 << 0, Removable = 1 << 1, Searchable = 1 << 2 } |
Flags for the map layer. More... | |
enum | PropertyType { Style = 0, Metadata } |
Maplayer has a style and a metadata property. More... | |
enum | ReadFlag { FlagDontResolveLayers = 1 << 0, FlagTrustLayerMetadata = 1 << 1 } |
Flags which control project read behavior. More... | |
enum | StyleCategory { LayerConfiguration = 1 << 0, Symbology = 1 << 1, Symbology3D = 1 << 2, Labeling = 1 << 3, Fields = 1 << 4, Forms = 1 << 5, Actions = 1 << 6, MapTips = 1 << 7, Diagrams = 1 << 8, AttributeTable = 1 << 9, Rendering = 1 << 10, CustomProperties = 1 << 11, GeometryOptions = 1 << 12, Relations = 1 << 13, Temporal = 1 << 14, Legend = 1 << 15, AllStyleCategories } |
Categories of style to distinguish appropriate sections for import/export. More... | |
Public Slots inherited from QgsMapLayer | |
void | emitStyleChanged () |
Triggers an emission of the styleChanged() signal. More... | |
virtual bool | setDependencies (const QSet< QgsMapLayerDependency > &layers) |
Sets the list of dependencies. More... | |
void | setMaximumScale (double scale) |
Sets the maximum map scale (i.e. More... | |
void | setMinimumScale (double scale) |
Sets the minimum map scale (i.e. More... | |
void | setRefreshOnNofifyMessage (const QString &message) |
Set the notification message that triggers repaint If refresh on notification is enabled, the notification will triggerRepaint only if the notification message is equal to. More... | |
void | setRefreshOnNotifyEnabled (bool enabled) |
Set whether provider notification is connected to triggerRepaint. More... | |
void | setScaleBasedVisibility (bool enabled) |
Sets whether scale based visibility is enabled for the layer. More... | |
void | triggerRepaint (bool deferredUpdate=false) |
Will advise the map canvas (and any other interested party) that this layer requires to be repainted. More... | |
Signals inherited from QgsMapLayer | |
void | autoRefreshIntervalChanged (int interval) |
Emitted when the auto refresh interval changes. More... | |
void | beforeResolveReferences (QgsProject *project) |
Emitted when all layers are loaded and references can be resolved, just before the references of this layer are resolved. More... | |
void | blendModeChanged (QPainter::CompositionMode blendMode) |
Signal emitted when the blend mode is changed, through QgsMapLayer::setBlendMode() More... | |
void | configChanged () |
Emitted whenever the configuration is changed. More... | |
void | crsChanged () |
Emit a signal that layer's CRS has been reset. More... | |
void | dataChanged () |
Data of layer changed. More... | |
void | dataSourceChanged () |
Emitted whenever the layer's data source has been changed. More... | |
void | dependenciesChanged () |
Emitted when dependencies are changed. More... | |
void | flagsChanged () |
Emitted when layer's flags have been modified. More... | |
void | isValidChanged () |
Emitted when the validity of this layer changed. More... | |
void | legendChanged () |
Signal emitted when legend of the layer has changed. More... | |
void | metadataChanged () |
Emitted when the layer's metadata is changed. More... | |
void | nameChanged () |
Emitted when the name has been changed. More... | |
void | recalculateExtents () const |
This is used to send a request that any mapcanvas using this layer update its extents. More... | |
void | renderer3DChanged () |
Signal emitted when 3D renderer associated with the layer has changed. More... | |
void | rendererChanged () |
Signal emitted when renderer is changed. More... | |
void | repaintRequested (bool deferredUpdate=false) |
By emitting this signal the layer tells that either appearance or content have been changed and any view showing the rendered layer should refresh itself. More... | |
void | statusChanged (const QString &status) |
Emit a signal with status (e.g. to be caught by QgisApp and display a msg on status bar) More... | |
void | styleChanged () |
Signal emitted whenever a change affects the layer's style. More... | |
void | styleLoaded (QgsMapLayer::StyleCategories categories) |
Emitted when a style has been loaded. More... | |
void | willBeDeleted () |
Emitted in the destructor when the layer is about to be deleted, but it is still in a perfectly valid state: the last chance for other pieces of code for some cleanup if they use the layer. More... | |
Static Public Member Functions inherited from QgsMapLayer | |
static QString | extensionPropertyType (PropertyType type) |
Returns the extension of a Property. More... | |
static QString | formatLayerName (const QString &name) |
A convenience function to capitalize and format a layer name. More... | |
static QString | generateId (const QString &layerName) |
Generates an unique identifier for this layer, the generate ID is prefixed by layerName. More... | |
Protected Member Functions inherited from QgsMapLayer | |
void | appendError (const QgsErrorMessage &error) |
Add error message. More... | |
void | clone (QgsMapLayer *layer) const |
Copies attributes like name, short name, ... More... | |
virtual QString | decodedSource (const QString &source, const QString &dataProvider, const QgsReadWriteContext &context) const |
Called by readLayerXML(), used by derived classes to decode provider's specific data source from project files. More... | |
virtual QString | encodedSource (const QString &source, const QgsReadWriteContext &context) const |
Called by writeLayerXML(), used by derived classes to encode provider's specific data source to project files. More... | |
Q_DECL_DEPRECATED bool | hasDependencyCycle (const QSet< QgsMapLayerDependency > &) const |
Checks whether a new set of dependencies will introduce a cycle this method is now deprecated and always return false , because circular dependencies are now correctly managed. More... | |
void | readCommonStyle (const QDomElement &layerElement, const QgsReadWriteContext &context, StyleCategories categories=AllStyleCategories) |
Read style data common to all layer types. More... | |
void | readCustomProperties (const QDomNode &layerNode, const QString &keyStartsWith=QString()) |
Read custom properties from project file. More... | |
void | readStyleManager (const QDomNode &layerNode) |
Read style manager's configuration (if any). To be called by subclasses. More... | |
void | setError (const QgsError &error) |
Sets error message. More... | |
virtual void | setExtent (const QgsRectangle &rect) |
Sets the extent. More... | |
void | setProviderType (const QString &providerType) |
Sets the providerType (provider key) More... | |
void | setValid (bool valid) |
Sets whether layer is valid or not. More... | |
void | writeCommonStyle (QDomElement &layerElement, QDomDocument &document, const QgsReadWriteContext &context, StyleCategories categories=AllStyleCategories) const |
Write style data common to all layer types. More... | |
void | writeCustomProperties (QDomNode &layerNode, QDomDocument &doc) const |
Write custom properties to project file. More... | |
void | writeStyleManager (QDomNode &layerNode, QDomDocument &doc) const |
Write style manager's configuration (if exists). To be called by subclasses. More... | |
Protected Attributes inherited from QgsMapLayer | |
QString | mAbstract |
Description of the layer. More... | |
QString | mAttribution |
Attribution of the layer. More... | |
QString | mAttributionUrl |
QString | mDataSource |
Data source description string, varies by layer type. More... | |
QString | mDataUrl |
DataUrl of the layer. More... | |
QString | mDataUrlFormat |
QSet< QgsMapLayerDependency > | mDependencies |
List of layers that may modify this layer on modification. More... | |
QgsError | mError |
Error. More... | |
QgsRectangle | mExtent |
Extent of the layer. More... | |
bool | mIsRefreshOnNofifyEnabled = false |
QString | mKeywordList |
QString | mLayerName |
Name of the layer - used for display. More... | |
QString | mLegendUrl |
WMS legend. More... | |
QString | mLegendUrlFormat |
QString | mMetadataUrl |
MetadataUrl of the layer. More... | |
QString | mMetadataUrlFormat |
QString | mMetadataUrlType |
QString | mProviderKey |
Data provider key (name of the data provider) More... | |
QgsMapLayer::ReadFlags | mReadFlags = QgsMapLayer::ReadFlags() |
Read flags. It's up to the subclass to respect these when restoring state from XML. More... | |
QString | mRefreshOnNofifyMessage |
QString | mShortName |
bool | mShouldValidateCrs = true |
true if the layer's CRS should be validated and invalid CRSes are not permitted. More... | |
QString | mTitle |
bool | mValid = false |
Indicates if the layer is valid and can be drawn. More... | |
Properties inherited from QgsMapLayer | |
int | autoRefreshInterval |
QgsCoordinateReferenceSystem | crs |
bool | isValid |
QgsLayerMetadata | metadata |
QString | name |
QgsMapLayerType | type |
Represents a map layer containing a set of georeferenced annotations, e.g.
markers, lines, polygons or text items.
Annotation layers store a set of QgsAnnotationItem items, which are rendered according to the item's z-order.
Definition at line 39 of file qgsannotationlayer.h.
QgsAnnotationLayer::QgsAnnotationLayer | ( | const QString & | name, |
const QgsAnnotationLayer::LayerOptions & | options | ||
) |
Constructor for a new QgsAnnotationLayer with the specified layer name.
The options argument specifies load-time layer options.
Definition at line 25 of file qgsannotationlayer.cpp.
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override |
Definition at line 33 of file qgsannotationlayer.cpp.
QString QgsAnnotationLayer::addItem | ( | QgsAnnotationItem * | item | ) |
Adds an item to the layer.
Ownership of item is transferred to the layer.
Returns the unique ID assigned to the item.
Definition at line 47 of file qgsannotationlayer.cpp.
void QgsAnnotationLayer::clear | ( | ) |
Removes all items from the layer.
Definition at line 69 of file qgsannotationlayer.cpp.
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overridevirtual |
Returns a new instance equivalent to this one except for the id which is still unique.
Implements QgsMapLayer.
Definition at line 88 of file qgsannotationlayer.cpp.
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overridevirtual |
Returns new instance of QgsMapLayerRenderer that will be used for rendering of given context.
Implements QgsMapLayer.
Definition at line 104 of file qgsannotationlayer.cpp.
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overridevirtual |
Returns the extent of the layer.
Reimplemented from QgsMapLayer.
Definition at line 109 of file qgsannotationlayer.cpp.
bool QgsAnnotationLayer::isEmpty | ( | ) | const |
Returns true
if the annotation layer is empty and contains no annotations.
Definition at line 77 of file qgsannotationlayer.cpp.
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inline |
Returns a map of items contained in the layer, by unique item ID.
This map contains references to items owned by the layer, and ownership of these remains with the layer.
Definition at line 110 of file qgsannotationlayer.h.
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inline |
Returns the opacity for the annotation layer, where opacity is a value between 0 (totally transparent) and 1.0 (fully opaque).
Definition at line 124 of file qgsannotationlayer.h.
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overridevirtual |
Read the symbology for the current layer from the DOM node supplied.
node | node that will contain the symbology definition for this layer. |
errorMessage | reference to string that will be updated with any error messages |
context | reading context (used for transform from relative to absolute paths) |
categories | the style categories to be read |
true
in case of success. Implements QgsMapLayer.
Definition at line 209 of file qgsannotationlayer.cpp.
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overridevirtual |
Called by readLayerXML(), used by children to read state specific to them from project files.
Reimplemented from QgsMapLayer.
Definition at line 131 of file qgsannotationlayer.cpp.
bool QgsAnnotationLayer::removeItem | ( | const QString & | id | ) |
Removes (and deletes) the item with matching id.
Definition at line 57 of file qgsannotationlayer.cpp.
void QgsAnnotationLayer::reset | ( | ) |
Resets the annotation layer to a default state, and clears all items from it.
Definition at line 39 of file qgsannotationlayer.cpp.
void QgsAnnotationLayer::setOpacity | ( | double | opacity | ) |
Sets the opacity for the annotation layer, where opacity is a value between 0 (totally transparent) and 1.0 (fully opaque).
Definition at line 82 of file qgsannotationlayer.cpp.
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overridevirtual |
Sets the coordinate transform context to transformContext.
Implements QgsMapLayer.
Definition at line 126 of file qgsannotationlayer.cpp.
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overridevirtual |
Write the style for the layer into the docment provided.
node | the node that will have the style element added to it. |
doc | the document that will have the QDomNode added. |
errorMessage | reference to string that will be updated with any error messages |
context | writing context (used for transform from absolute to relative paths) |
categories | the style categories to be written |
true
in case of success. Implements QgsMapLayer.
Definition at line 196 of file qgsannotationlayer.cpp.
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overridevirtual |
Called by writeLayerXML(), used by children to write state specific to them to project files.
Reimplemented from QgsMapLayer.
Definition at line 167 of file qgsannotationlayer.cpp.