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55 lines
2.5 KiB
Plaintext
55 lines
2.5 KiB
Plaintext
/**
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* Assorted functions for dealing with layer trees.
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*
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* @note added in 2.4
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*/
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class QgsLayerTreeUtils
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{
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%TypeHeaderCode
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#include <qgslayertreeutils.h>
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%End
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public:
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//! Try to load layer tree from \verbatim <legend> \endverbatim tag from project files from QGIS 2.2 and below
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static bool readOldLegend( QgsLayerTreeGroup* root, const QDomElement& legendElem );
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//! Try to load custom layer order from \verbatim <legend> \endverbatim tag from project files from QGIS 2.2 and below
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static bool readOldLegendLayerOrder( const QDomElement& legendElem, bool& hasCustomOrder, QStringList& order );
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//! Return \verbatim <legend> \endverbatim tag used in QGIS 2.2 and below
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static QDomElement writeOldLegend( QDomDocument& doc, QgsLayerTreeGroup* root, bool hasCustomOrder, const QStringList& order );
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//! Convert Qt::CheckState to QString
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static QString checkStateToXml( Qt::CheckState state );
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//! Convert QString to Qt::CheckState
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static Qt::CheckState checkStateFromXml( const QString& txt );
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//! Return true if any of the layers is editable
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static bool layersEditable( const QList<QgsLayerTreeLayer*>& layerNodes );
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//! Return true if any of the layers is modified
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static bool layersModified( const QList<QgsLayerTreeLayer*>& layerNodes );
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//! Remove layer nodes that refer to invalid layers
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static void removeInvalidLayers( QgsLayerTreeGroup* group );
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//! Remove subtree of embedded groups and replaces it with a custom property embedded-visible-layers
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static void replaceChildrenOfEmbeddedGroups( QgsLayerTreeGroup* group );
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//! get invisible layers
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static QStringList invisibleLayerList( QgsLayerTreeNode *node );
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//! Set the expression filter of a legend layer
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static void setLegendFilterByExpression( QgsLayerTreeLayer& layer, const QString& expr, bool enabled = true );
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//! Return the expression filter of a legend layer
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static QString legendFilterByExpression( const QgsLayerTreeLayer& layer, bool* enabled = 0 );
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//! Test if one of the layers in a group has an expression filter
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static bool hasLegendFilterExpression( const QgsLayerTreeGroup& group );
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//! Insert a QgsMapLayer just below another one
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//! @param group the tree group where layers are (can be the root group)
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//! @param refLayer the reference layer
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//! @param layerToInsert the new layer to insert just below the reference layer
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//! @returns the new tree layer
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static QgsLayerTreeLayer* insertLayerBelow( QgsLayerTreeGroup* group, const QgsMapLayer* refLayer, QgsMapLayer* layerToInsert );
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};
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