Contents
When does the qgisinterface signal get emitted?
Emitted whenever current (selected) layer changes. Signal emitted when the current theme is changed so plugins can change their tool button icons. This signal is emitted after a layout designer window is closed. This signal is emitted when a new layout designer has been opened.
How is the qgsvectorlayer constructed in QGIS?
The QgsVectorLayer is constructed by instantiating a data provider. The provider interprets the supplied path (url) of the data source to connect to and access the data. path – The path or url of the parameter.
How to add layer widget in QGIS project?
Add action to context menu for a specific layer in the layer tree. Add action to context menu for layers in the layer tree. Add a widget to the database toolbar. Returns a reference to the main window “Add Layer” menu. Add a widget to the raster toolbar. Add a widget to the plugins toolbar.
How is a QGIS expression used in WFS?
The ‘FILTER’ query string parameter can be used to filter the WFS feature type. The ‘FILTER’ key value can either be a QGIS expression or an OGC XML filter. If the value is set to a QGIS expression the driver will turn it into OGC XML filter before passing it to the WFS server.
How to control rule based labelling in QGIS 3?
From QGIS 3, there is a new QgsRuleBasedLabeling Class which would allow you to control rule-based labelling using the new API. Rules can be added using QgsRuleBasedLabeling::Rule. ( Unfortunately, I cannot test the 2.99 version at the moment.
Where do I find native add action in QGIS?
QGIS implements it in QgisAppInterface class, 3rd party applications could provide their own implementation to be able to use plugins. Returns the native Add ArcGIS FeatureServer action. Returns the native Add ArcGIS MapServer action. Returns the native Add Feature action. Returns the native Add Part action.