Class: QgsMapThemeCollection

class qgis.core.QgsMapThemeCollection(project: QgsProject = None)

Bases: PyQt5.QtCore.QObject

Create map theme collection that handles themes of the given project.

Container class that allows storage of map themes consisting of visible map layers and layer styles.

New in version 2.12: Enums

Methods

applyTheme Apply theme given by its name and modify layer tree, current style of layers and checked legend items of passed layer tree model.
childEvent
clear Remove all map themes from the collection.
connectNotify
createThemeFromCurrentState Static method to create theme from the current state of layer visibilities in layer tree, current style of layers and check state of legend items (from a layer tree model).
customEvent
disconnectNotify
hasMapTheme Returns whether a map theme with a matching name exists.
insert Inserts a new map theme to the collection.
isSignalConnected
mapThemeState Returns the recorded state of a map theme.
mapThemeStyleOverrides Gets layer style overrides (for QgsMapSettings) of the visible layers for given map theme.
mapThemeVisibleLayerIds Returns the list of layer IDs that are visible for the specified map theme.
mapThemeVisibleLayers Returns the list of layers that are visible for the specified map theme.
mapThemes Returns a list of existing map theme names.
masterLayerOrder Returns the master layer order (this will always match the project’s QgsProject.layerOrder() ).
masterVisibleLayers Returns the master list of visible layers.
project The QgsProject on which this map theme collection works.
readXml Reads the map theme collection state from XML
receivers
removeMapTheme Remove an existing map theme from collection.
sender
senderSignalIndex
setProject copydoc project()
timerEvent
update Updates a map theme within the collection.
writeXml Writes the map theme collection state to XML.

Signals

mapThemeChanged Emitted when a map theme changes definition.
mapThemesChanged Emitted when map themes within the collection are changed.
projectChanged Emitted when the project changes

Attributes

class MapThemeLayerRecord(l: QgsMapLayer = None)

Bases: sip.wrapper

Initialize layer record with a map layer - it will be stored as a weak pointer

QgsMapThemeCollection.MapThemeLayerRecord(QgsMapThemeCollection.MapThemeLayerRecord)

Individual record of a visible layer in a map theme record.

New in version 3.0.

checkedLegendItems
currentStyle
expandedLayerNode
expandedLegendItems
layer(self) → QgsMapLayer

Returns map layer or null if the layer does not exist anymore

setLayer(self, layer: QgsMapLayer)

Sets the map layer for this record

usingCurrentStyle
usingLegendItems
class MapThemeRecord

Bases: sip.wrapper

Individual map theme record of visible layers and styles.

New in version 3.0.

addLayerRecord(self, record: QgsMapThemeCollection.MapThemeLayerRecord)

Add a new record for a layer.

expandedGroupNodes(self) → Set[str]

Returns a set of group identifiers for group nodes that should have expanded state (other group nodes should be collapsed). The returned value is valid only when hasExpandedStateInfo() returns True. Group identifiers are built using group names, a sub-group name is prepended by parent group’s identifier and a forward slash, e.g. “level1/level2”

New in version 3.2.

hasExpandedStateInfo(self) → bool

Returns whether information about expanded/collapsed state of nodes has been recorded and thus whether expandedGroupNodes() and expandedLegendItems + expandedLayerNode from layer records are valid.

New in version 3.2.

layerRecords(self) → object

Returns a list of records for all visible layer belonging to the theme.

removeLayerRecord(self, layer: QgsMapLayer)

Removes a record for layer if present.

setExpandedGroupNodes(self, expandedGroupNodes: Iterable[str])

Sets a set of group identifiers for group nodes that should have expanded state. See expandedGroupNodes().

New in version 3.2.

setHasExpandedStateInfo(self, hasInfo: bool)

Sets whether the map theme contains valid expanded/collapsed state of nodes

New in version 3.2.

setLayerRecords(self, records: Iterable[QgsMapThemeCollection.MapThemeLayerRecord])

Sets layer records for the theme.

applyTheme(self, name: str, root: QgsLayerTreeGroup, model: QgsLayerTreeModel)

Apply theme given by its name and modify layer tree, current style of layers and checked legend items of passed layer tree model.

New in version 3.0.

childEvent()
clear(self)

Remove all map themes from the collection.

connectNotify()
createThemeFromCurrentState(root: QgsLayerTreeGroup, model: QgsLayerTreeModel) → QgsMapThemeCollection.MapThemeRecord

Static method to create theme from the current state of layer visibilities in layer tree, current style of layers and check state of legend items (from a layer tree model).

New in version 3.0.

customEvent()
disconnectNotify()
hasMapTheme(self, name: str) → bool

Returns whether a map theme with a matching name exists.

New in version 3.0.

insert(self, name: str, state: QgsMapThemeCollection.MapThemeRecord)

Inserts a new map theme to the collection.

See also

update()

isSignalConnected()
mapThemeChanged

Emitted when a map theme changes definition.

New in version 3.0: [signal]

mapThemeState(self, name: str) → QgsMapThemeCollection.MapThemeRecord

Returns the recorded state of a map theme.

New in version 3.0.

mapThemeStyleOverrides(self, name: str) → Dict[str, str]

Gets layer style overrides (for QgsMapSettings) of the visible layers for given map theme.

New in version 3.0.

mapThemeVisibleLayerIds(self, name: str) → List[str]

Returns the list of layer IDs that are visible for the specified map theme.

Note

The order of the returned list is not guaranteed to reflect the order of layers in the canvas.

New in version 3.0.

mapThemeVisibleLayers(self, name: str) → List[QgsMapLayer]

Returns the list of layers that are visible for the specified map theme.

Note

The order of the returned list is not guaranteed to reflect the order of layers in the canvas.

New in version 3.0.

mapThemes(self) → List[str]

Returns a list of existing map theme names.

New in version 3.0.

mapThemesChanged

Emitted when map themes within the collection are changed.

New in version 3.0: [signal]

masterLayerOrder(self) → List[QgsMapLayer]

Returns the master layer order (this will always match the project’s QgsProject.layerOrder() ). All map themes will maintain the same layer order as the master layer order.

New in version 3.0.

masterVisibleLayers(self) → List[QgsMapLayer]

Returns the master list of visible layers. The order of returned layers will always match those of masterLayerOrder(), but the returned layers are filtered to only include those visible in the project’s layer tree.

New in version 3.0.

project(self) → QgsProject

The QgsProject on which this map theme collection works.

New in version 3.0.

projectChanged

Emitted when the project changes

copydoc project()

New in version 3.0: [signal]

readXml(self, doc: QDomDocument)

Reads the map theme collection state from XML

Parameters:doc – DOM document

See also

writeXml()

receivers()
removeMapTheme(self, name: str)

Remove an existing map theme from collection.

New in version 3.0.

sender()
senderSignalIndex()
setProject(self, project: QgsProject)

copydoc project()

New in version 3.0.

timerEvent()
update(self, name: str, state: QgsMapThemeCollection.MapThemeRecord)

Updates a map theme within the collection.

Parameters:
  • name – name of map theme to update
  • state – map theme record to replace existing map theme

See also

insert()

writeXml(self, doc: QDomDocument)

Writes the map theme collection state to XML.

Parameters:doc – DOM document

See also

readXml()