QGIS API Documentation  2.9.0-Master
Classes | Public Types | Public Member Functions | Static Public Member Functions | Protected Slots | Protected Member Functions | Static Protected Member Functions | Protected Attributes | List of all members
QgsLayerTreeModel Class Reference

The QgsLayerTreeModel class is model implementation for Qt item views framework. More...

#include <qgslayertreemodel.h>

Inheritance diagram for QgsLayerTreeModel:
Inheritance graph
[legend]

Classes

struct  LayerLegendData
 Structure that stores all data associated with one map layer. More...
 
struct  LayerLegendTree
 Structure that stores tree representation of map layer's legend. More...
 

Public Types

enum  Flag {
  ShowLegend = 0x0001, ShowSymbology = 0x0001, ShowRasterPreviewIcon = 0x0002, ShowLegendAsTree = 0x0004,
  AllowNodeReorder = 0x1000, AllowNodeRename = 0x2000, AllowNodeChangeVisibility = 0x4000, AllowLegendChangeState = 0x8000,
  AllowSymbologyChangeState = 0x8000
}
 

Public Member Functions

 QgsLayerTreeModel (QgsLayerTreeGroup *rootNode, QObject *parent=0)
 Construct a new tree model with given layer tree (root node must not be null pointer). More...
 
 ~QgsLayerTreeModel ()
 
int autoCollapseLegendNodes () const
 Return at what number of legend nodes the layer node should be collapsed. -1 means no auto-collapse (default). More...
 
Q_DECL_DEPRECATED int autoCollapseSymbologyNodes () const
 
int columnCount (const QModelIndex &parent=QModelIndex()) const override
 
QModelIndex currentIndex () const
 Get index of the item marked as current. Item marked as current is underlined. More...
 
QVariant data (const QModelIndex &index, int role=Qt::DisplayRole) const override
 
bool dropMimeData (const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) override
 
Qt::ItemFlags flags (const QModelIndex &index) const override
 
Flags flags () const
 Return OR-ed combination of model flags. More...
 
QModelIndex index (int row, int column, const QModelIndex &parent=QModelIndex()) const override
 
QgsLayerTreeNodeindex2node (const QModelIndex &index) const
 Return layer tree node for given index. More...
 
QList< QgsLayerTreeNode * > indexes2nodes (const QModelIndexList &list, bool skipInternal=false) const
 Convert a list of indexes to a list of layer tree nodes. More...
 
Q_DECL_DEPRECATED bool isIndexSymbologyNode (const QModelIndex &index) const
 Return true if index represents a legend node (instead of layer node) More...
 
QList< QgsLayerTreeModelLegendNode * > layerLegendNodes (QgsLayerTreeLayer *nodeLayer)
 Return list of legend nodes attached to a particular layer node. More...
 
Q_DECL_DEPRECATED QgsLayerTreeLayerlayerNodeForSymbologyNode (const QModelIndex &index) const
 Return layer node to which a legend node belongs to. More...
 
QMap< QString, QString > layerStyleOverrides () const
 Get map of map layer style overrides (key: layer ID, value: style name) where a different style should be used instead of the current one. More...
 
QFont layerTreeNodeFont (int nodeType) const
 Get font for a particular type of layer tree node. nodeType should come from QgsLayerTreeNode::NodeType enumeration. More...
 
const QgsMapSettingslegendFilterByMap () const
 
double legendFilterByScale () const
 
void legendMapViewData (double *mapUnitsPerPixel, int *dpi, double *scale)
 Get hints about map view - to be used in legend nodes. More...
 
QModelIndex legendNode2index (QgsLayerTreeModelLegendNode *legendNode)
 Return index for a given legend node. More...
 
QMimeData * mimeData (const QModelIndexList &indexes) const override
 
QStringList mimeTypes () const override
 
QModelIndex node2index (QgsLayerTreeNode *node) const
 Return index for a given node. If the node does not belong to the layer tree, the result is undefined. More...
 
QModelIndex parent (const QModelIndex &child) const override
 
void refreshLayerLegend (QgsLayerTreeLayer *nodeLayer)
 Force a refresh of legend nodes of a layer node. More...
 
Q_DECL_DEPRECATED void refreshLayerSymbology (QgsLayerTreeLayer *nodeLayer)
 
bool removeRows (int row, int count, const QModelIndex &parent=QModelIndex()) override
 
QgsLayerTreeGrouprootGroup () const
 Return pointer to the root node of the layer tree. Always a non-null pointer. More...
 
int rowCount (const QModelIndex &parent=QModelIndex()) const override
 
void setAutoCollapseLegendNodes (int nodeCount)
 Set at what number of legend nodes the layer node should be collapsed. Setting -1 disables the auto-collapse (default). More...
 
Q_DECL_DEPRECATED void setAutoCollapseSymbologyNodes (int nodeCount)
 
void setCurrentIndex (const QModelIndex &currentIndex)
 Set index of the current item. May be used by view. Item marked as current is underlined. More...
 
bool setData (const QModelIndex &index, const QVariant &value, int role=Qt::EditRole) override
 
void setFlag (Flag f, bool on=true)
 Enable or disable a model flag. More...
 
void setFlags (Flags f)
 Set OR-ed combination of model flags. More...
 
void setLayerStyleOverrides (const QMap< QString, QString > &overrides)
 Set map of map layer style overrides (key: layer ID, value: style name) where a different style should be used instead of the current one. More...
 
void setLayerTreeNodeFont (int nodeType, const QFont &font)
 Set font for a particular type of layer tree node. nodeType should come from QgsLayerTreeNode::NodeType enumeration. More...
 
void setLegendFilterByMap (const QgsMapSettings *settings)
 Force only display of legend nodes which are valid for given map settings. More...
 
void setLegendFilterByScale (double scaleDenominator)
 Force only display of legend nodes which are valid for given scale denominator. More...
 
void setLegendMapViewData (double mapUnitsPerPixel, int dpi, double scale)
 Give the layer tree model hints about the currently associated map view so that legend nodes that use map units can be scaled currectly. More...
 
void setRootGroup (QgsLayerTreeGroup *newRootGroup)
 Reset the model and use a new root group node. More...
 
Qt::DropActions supportedDropActions () const override
 
bool testFlag (Flag f) const
 Check whether a flag is enabled. More...
 

Static Public Member Functions

static QgsLayerTreeModelLegendNodeindex2legendNode (const QModelIndex &index)
 Return legend node for given index. More...
 

Protected Slots

void layerLegendChanged ()
 
void layerNeedsUpdate ()
 
void legendNodeDataChanged ()
 
void nodeAddedChildren (QgsLayerTreeNode *node, int indexFrom, int indexTo)
 
void nodeCustomPropertyChanged (QgsLayerTreeNode *node, const QString &key)
 
void nodeLayerLoaded ()
 
void nodeLayerWillBeUnloaded ()
 
void nodeRemovedChildren ()
 
void nodeVisibilityChanged (QgsLayerTreeNode *node)
 
void nodeWillAddChildren (QgsLayerTreeNode *node, int indexFrom, int indexTo)
 
void nodeWillRemoveChildren (QgsLayerTreeNode *node, int indexFrom, int indexTo)
 

Protected Member Functions

void addLegendToLayer (QgsLayerTreeLayer *nodeL)
 
void connectToLayer (QgsLayerTreeLayer *nodeLayer)
 
void connectToLayers (QgsLayerTreeGroup *parentGroup)
 
void connectToRootNode ()
 
void disconnectFromLayer (QgsLayerTreeLayer *nodeLayer)
 
void disconnectFromLayers (QgsLayerTreeGroup *parentGroup)
 
void disconnectFromRootNode ()
 
QList< QgsLayerTreeModelLegendNode * > filterLegendNodes (const QList< QgsLayerTreeModelLegendNode * > &nodes)
 Filter nodes from QgsMapLayerLegend according to the current filtering rules. More...
 
QModelIndex indexOfParentLayerTreeNode (QgsLayerTreeNode *parentNode) const
 
void legendCleanup ()
 
bool legendEmbeddedInParent (QgsLayerTreeLayer *nodeLayer) const
 
QIcon legendIconEmbeddedInParent (QgsLayerTreeLayer *nodeLayer) const
 
void legendInvalidateMapBasedData ()
 
QVariant legendNodeData (QgsLayerTreeModelLegendNode *node, int role) const
 
Qt::ItemFlags legendNodeFlags (QgsLayerTreeModelLegendNode *node) const
 
QModelIndex legendNodeIndex (int row, int column, QgsLayerTreeModelLegendNode *node) const
 
int legendNodeRowCount (QgsLayerTreeModelLegendNode *node) const
 
QModelIndex legendParent (QgsLayerTreeModelLegendNode *legendNode) const
 
QModelIndex legendRootIndex (int row, int column, QgsLayerTreeLayer *nL) const
 
int legendRootRowCount (QgsLayerTreeLayer *nL) const
 
void recursivelyEmitDataChanged (const QModelIndex &index=QModelIndex())
 emit dataChanged() for layer tree node items More...
 
void removeLegendFromLayer (QgsLayerTreeLayer *nodeLayer)
 
void tryBuildLegendTree (LayerLegendData &data)
 

Static Protected Member Functions

static const QIcon & iconGroup ()
 

Protected Attributes

int mAutoCollapseLegendNodesCount
 Minimal number of nodes when legend should be automatically collapsed. -1 = disabled. More...
 
QPersistentModelIndex mCurrentIndex
 Current index - will be underlined. More...
 
Flags mFlags
 Set of flags for the model. More...
 
QFont mFontGroup
 
QFont mFontLayer
 
QMap< QString, QString > mLayerStyleOverrides
 Overrides of map layers' styles: key = layer ID, value = style XML. More...
 
QMap< QgsLayerTreeLayer *, LayerLegendDatamLegend
 Per layer data about layer's legend nodes. More...
 
QScopedPointer< QgsMapHitTestmLegendFilterByMapHitTest
 
QScopedPointer< QgsMapSettingsmLegendFilterByMapSettings
 
double mLegendFilterByScale
 scale denominator for filtering of legend nodes (<= 0 means no filtering) More...
 
int mLegendMapViewDpi
 
double mLegendMapViewMupp
 
double mLegendMapViewScale
 
QgsLayerTreeGroupmRootNode
 Pointer to the root node of the layer tree. Not owned by the model. More...
 

Detailed Description

The QgsLayerTreeModel class is model implementation for Qt item views framework.

The model can be used in any QTreeView, it is however recommended to use it with QgsLayerTreeView which brings additional functionality specific to layer tree handling.

The model listens to the changes in the layer tree and signals the changes as appropriate, so that any view that uses the model is updated accordingly.

Behavior of the model can be customized with flags. For example, whether to show legend or whether to allow changes to the layer tree.

See also
QgsLayerTreeView
Note
added in 2.4

Definition at line 46 of file qgslayertreemodel.h.

Member Enumeration Documentation

Enumerator
ShowLegend 

Add legend nodes for layer nodes.

ShowSymbology 

deprecated - use ShowLegend

ShowRasterPreviewIcon 

Will use real preview of raster layer as icon (may be slow)

ShowLegendAsTree 

For legends that support it, will show them in a tree instead of a list (needs also ShowLegend). Added in 2.8.

AllowNodeReorder 

Allow reordering with drag'n'drop.

AllowNodeRename 

Allow renaming of groups and layers.

AllowNodeChangeVisibility 

Allow user to set node visibility with a check box.

AllowLegendChangeState 

Allow check boxes for legend nodes (if supported by layer's legend)

AllowSymbologyChangeState 

deprecated - use AllowLegendChangeState

Definition at line 72 of file qgslayertreemodel.h.

Constructor & Destructor Documentation

QgsLayerTreeModel::QgsLayerTreeModel ( QgsLayerTreeGroup rootNode,
QObject *  parent = 0 
)
explicit

Construct a new tree model with given layer tree (root node must not be null pointer).

The root node is not transferred by the model.

Definition at line 35 of file qgslayertreemodel.cpp.

QgsLayerTreeModel::~QgsLayerTreeModel ( )

Definition at line 50 of file qgslayertreemodel.cpp.

Member Function Documentation

void QgsLayerTreeModel::addLegendToLayer ( QgsLayerTreeLayer nodeL)
protected

Definition at line 1073 of file qgslayertreemodel.cpp.

int QgsLayerTreeModel::autoCollapseLegendNodes ( ) const
inline

Return at what number of legend nodes the layer node should be collapsed. -1 means no auto-collapse (default).

Definition at line 143 of file qgslayertreemodel.h.

Q_DECL_DEPRECATED int QgsLayerTreeModel::autoCollapseSymbologyNodes ( ) const
inline
int QgsLayerTreeModel::columnCount ( const QModelIndex &  parent = QModelIndex()) const
override

Definition at line 85 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::connectToLayer ( QgsLayerTreeLayer nodeLayer)
protected

Definition at line 747 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::connectToLayers ( QgsLayerTreeGroup parentGroup)
protected

Definition at line 825 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::connectToRootNode ( )
protected

Definition at line 847 of file qgslayertreemodel.cpp.

QModelIndex QgsLayerTreeModel::currentIndex ( ) const

Get index of the item marked as current. Item marked as current is underlined.

Definition at line 492 of file qgslayertreemodel.cpp.

QVariant QgsLayerTreeModel::data ( const QModelIndex &  index,
int  role = Qt::DisplayRole 
) const
override

Definition at line 150 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::disconnectFromLayer ( QgsLayerTreeLayer nodeLayer)
protected

Definition at line 806 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::disconnectFromLayers ( QgsLayerTreeGroup parentGroup)
protected

Definition at line 836 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::disconnectFromRootNode ( )
protected

Definition at line 862 of file qgslayertreemodel.cpp.

bool QgsLayerTreeModel::dropMimeData ( const QMimeData *  data,
Qt::DropAction  action,
int  row,
int  column,
const QModelIndex &  parent 
)
override

Definition at line 917 of file qgslayertreemodel.cpp.

QList< QgsLayerTreeModelLegendNode * > QgsLayerTreeModel::filterLegendNodes ( const QList< QgsLayerTreeModelLegendNode * > &  nodes)
protected

Filter nodes from QgsMapLayerLegend according to the current filtering rules.

Definition at line 1009 of file qgslayertreemodel.cpp.

Qt::ItemFlags QgsLayerTreeModel::flags ( const QModelIndex &  index) const
override

Definition at line 283 of file qgslayertreemodel.cpp.

QgsLayerTreeModel::Flags QgsLayerTreeModel::flags ( ) const

Return OR-ed combination of model flags.

Definition at line 989 of file qgslayertreemodel.cpp.

const QIcon & QgsLayerTreeModel::iconGroup ( )
staticprotected

Definition at line 999 of file qgslayertreemodel.cpp.

QModelIndex QgsLayerTreeModel::index ( int  row,
int  column,
const QModelIndex &  parent = QModelIndex() 
) const
override

Definition at line 91 of file qgslayertreemodel.cpp.

QgsLayerTreeModelLegendNode * QgsLayerTreeModel::index2legendNode ( const QModelIndex &  index)
static

Return legend node for given index.

Returns null for invalid index

Note
added in 2.6

Definition at line 1164 of file qgslayertreemodel.cpp.

QgsLayerTreeNode * QgsLayerTreeModel::index2node ( const QModelIndex &  index) const

Return layer tree node for given index.

Returns root node for invalid index. Returns null pointer if index does not refer to a layer tree node (e.g. it is a legend node)

Definition at line 55 of file qgslayertreemodel.cpp.

QList< QgsLayerTreeNode * > QgsLayerTreeModel::indexes2nodes ( const QModelIndexList &  list,
bool  skipInternal = false 
) const

Convert a list of indexes to a list of layer tree nodes.

Indices that do not represent layer tree nodes are skipped.

  • skipInternal If true, a node is included in the output list only if no parent node is in the list

Definition at line 415 of file qgslayertreemodel.cpp.

QModelIndex QgsLayerTreeModel::indexOfParentLayerTreeNode ( QgsLayerTreeNode parentNode) const
protected

Definition at line 135 of file qgslayertreemodel.cpp.

bool QgsLayerTreeModel::isIndexSymbologyNode ( const QModelIndex &  index) const

Return true if index represents a legend node (instead of layer node)

Deprecated:
use index2legendNode()

Definition at line 441 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::layerLegendChanged ( )
protectedslot

Definition at line 701 of file qgslayertreemodel.cpp.

QList< QgsLayerTreeModelLegendNode * > QgsLayerTreeModel::layerLegendNodes ( QgsLayerTreeLayer nodeLayer)

Return list of legend nodes attached to a particular layer node.

Note
added in 2.6

Definition at line 1295 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::layerNeedsUpdate ( )
protectedslot

Definition at line 717 of file qgslayertreemodel.cpp.

QgsLayerTreeLayer * QgsLayerTreeModel::layerNodeForSymbologyNode ( const QModelIndex &  index) const

Return layer node to which a legend node belongs to.

Returns null pointer if index is not a legend node.

Deprecated:
use index2legendNode()->parent()

Definition at line 446 of file qgslayertreemodel.cpp.

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

Get map of map layer style overrides (key: layer ID, value: style name) where a different style should be used instead of the current one.

Note
added in 2.10

Definition at line 606 of file qgslayertreemodel.cpp.

QFont QgsLayerTreeModel::layerTreeNodeFont ( int  nodeType) const

Get font for a particular type of layer tree node. nodeType should come from QgsLayerTreeNode::NodeType enumeration.

Definition at line 534 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::legendCleanup ( )
protected

Definition at line 1051 of file qgslayertreemodel.cpp.

bool QgsLayerTreeModel::legendEmbeddedInParent ( QgsLayerTreeLayer nodeLayer) const
protected

Definition at line 1282 of file qgslayertreemodel.cpp.

const QgsMapSettings* QgsLayerTreeModel::legendFilterByMap ( ) const
inline

Definition at line 156 of file qgslayertreemodel.h.

double QgsLayerTreeModel::legendFilterByScale ( ) const
inline

Definition at line 149 of file qgslayertreemodel.h.

QIcon QgsLayerTreeModel::legendIconEmbeddedInParent ( QgsLayerTreeLayer nodeLayer) const
protected

Definition at line 1289 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::legendInvalidateMapBasedData ( )
protected

Definition at line 1300 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::legendMapViewData ( double *  mapUnitsPerPixel,
int *  dpi,
double *  scale 
)

Get hints about map view - to be used in legend nodes.

Arguments that are not null will receive values. If there are no valid map view data (from previous call to setLegendMapViewData()), returned values are zeros.

Note
added in 2.6

Definition at line 599 of file qgslayertreemodel.cpp.

QModelIndex QgsLayerTreeModel::legendNode2index ( QgsLayerTreeModelLegendNode legendNode)

Return index for a given legend node.

If the legend node does not belong to the layer tree, the result is undefined. If the legend node is belongs to the tree but it is filtered out, invalid model index is returned.

Note
added in 2.6

Definition at line 1170 of file qgslayertreemodel.cpp.

QVariant QgsLayerTreeModel::legendNodeData ( QgsLayerTreeModelLegendNode node,
int  role 
) const
protected

Definition at line 1265 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::legendNodeDataChanged ( )
protectedslot

Definition at line 735 of file qgslayertreemodel.cpp.

Qt::ItemFlags QgsLayerTreeModel::legendNodeFlags ( QgsLayerTreeModelLegendNode node) const
protected

Definition at line 1273 of file qgslayertreemodel.cpp.

QModelIndex QgsLayerTreeModel::legendNodeIndex ( int  row,
int  column,
QgsLayerTreeModelLegendNode node 
) const
protected

Definition at line 1235 of file qgslayertreemodel.cpp.

int QgsLayerTreeModel::legendNodeRowCount ( QgsLayerTreeModelLegendNode node) const
protected

Definition at line 1198 of file qgslayertreemodel.cpp.

QModelIndex QgsLayerTreeModel::legendParent ( QgsLayerTreeModelLegendNode legendNode) const
protected

Definition at line 1245 of file qgslayertreemodel.cpp.

QModelIndex QgsLayerTreeModel::legendRootIndex ( int  row,
int  column,
QgsLayerTreeLayer nL 
) const
protected

Definition at line 1224 of file qgslayertreemodel.cpp.

int QgsLayerTreeModel::legendRootRowCount ( QgsLayerTreeLayer nL) const
protected

Definition at line 1208 of file qgslayertreemodel.cpp.

QMimeData * QgsLayerTreeModel::mimeData ( const QModelIndexList &  indexes) const
override

Definition at line 897 of file qgslayertreemodel.cpp.

QStringList QgsLayerTreeModel::mimeTypes ( ) const
override

Definition at line 889 of file qgslayertreemodel.cpp.

QModelIndex QgsLayerTreeModel::node2index ( QgsLayerTreeNode node) const

Return index for a given node. If the node does not belong to the layer tree, the result is undefined.

Definition at line 379 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::nodeAddedChildren ( QgsLayerTreeNode node,
int  indexFrom,
int  indexTo 
)
protectedslot

Definition at line 637 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::nodeCustomPropertyChanged ( QgsLayerTreeNode node,
const QString &  key 
)
protectedslot

Definition at line 672 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::nodeLayerLoaded ( )
protectedslot

Definition at line 679 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::nodeLayerWillBeUnloaded ( )
protectedslot

Definition at line 689 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::nodeRemovedChildren ( )
protectedslot

Definition at line 658 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::nodeVisibilityChanged ( QgsLayerTreeNode node)
protectedslot

Definition at line 663 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::nodeWillAddChildren ( QgsLayerTreeNode node,
int  indexFrom,
int  indexTo 
)
protectedslot

Definition at line 616 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::nodeWillRemoveChildren ( QgsLayerTreeNode node,
int  indexFrom,
int  indexTo 
)
protectedslot

Definition at line 647 of file qgslayertreemodel.cpp.

QModelIndex QgsLayerTreeModel::parent ( const QModelIndex &  child) const
override

Definition at line 113 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::recursivelyEmitDataChanged ( const QModelIndex &  index = QModelIndex())
protected

emit dataChanged() for layer tree node items

Definition at line 869 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::refreshLayerLegend ( QgsLayerTreeLayer nodeLayer)

Force a refresh of legend nodes of a layer node.

Not necessary to call when layer's renderer is changed as the model listens to these events.

Definition at line 472 of file qgslayertreemodel.cpp.

Q_DECL_DEPRECATED void QgsLayerTreeModel::refreshLayerSymbology ( QgsLayerTreeLayer nodeLayer)
inline
Deprecated:
use refreshLayerLegend()

Definition at line 181 of file qgslayertreemodel.h.

void QgsLayerTreeModel::removeLegendFromLayer ( QgsLayerTreeLayer nodeLayer)
protected

Definition at line 1062 of file qgslayertreemodel.cpp.

bool QgsLayerTreeModel::removeRows ( int  row,
int  count,
const QModelIndex &  parent = QModelIndex() 
)
override

Definition at line 965 of file qgslayertreemodel.cpp.

QgsLayerTreeGroup * QgsLayerTreeModel::rootGroup ( ) const

Return pointer to the root node of the layer tree. Always a non-null pointer.

Definition at line 452 of file qgslayertreemodel.cpp.

int QgsLayerTreeModel::rowCount ( const QModelIndex &  parent = QModelIndex()) const
override

Definition at line 65 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::setAutoCollapseLegendNodes ( int  nodeCount)
inline

Set at what number of legend nodes the layer node should be collapsed. Setting -1 disables the auto-collapse (default).

Definition at line 141 of file qgslayertreemodel.h.

Q_DECL_DEPRECATED void QgsLayerTreeModel::setAutoCollapseSymbologyNodes ( int  nodeCount)
inline
void QgsLayerTreeModel::setCurrentIndex ( const QModelIndex &  currentIndex)

Set index of the current item. May be used by view. Item marked as current is underlined.

Definition at line 497 of file qgslayertreemodel.cpp.

bool QgsLayerTreeModel::setData ( const QModelIndex &  index,
const QVariant &  value,
int  role = Qt::EditRole 
)
override

Definition at line 320 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::setFlag ( QgsLayerTreeModel::Flag  f,
bool  on = true 
)

Enable or disable a model flag.

Definition at line 981 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::setFlags ( Flags  f)

Set OR-ed combination of model flags.

Definition at line 976 of file qgslayertreemodel.cpp.

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

Set map of map layer style overrides (key: layer ID, value: style name) where a different style should be used instead of the current one.

Note
added in 2.10

Definition at line 611 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::setLayerTreeNodeFont ( int  nodeType,
const QFont &  font 
)

Set font for a particular type of layer tree node. nodeType should come from QgsLayerTreeNode::NodeType enumeration.

Definition at line 509 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::setLegendFilterByMap ( const QgsMapSettings settings)

Force only display of legend nodes which are valid for given map settings.

Setting null pointer or invalid map settings will disable the functionality. Ownership of map settings pointer does not change, a copy is made.

Note
added in 2.6

Definition at line 557 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::setLegendFilterByScale ( double  scaleDenominator)

Force only display of legend nodes which are valid for given scale denominator.

Setting value <= 0 will disable the functionality

Note
added in 2.6

Definition at line 547 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::setLegendMapViewData ( double  mapUnitsPerPixel,
int  dpi,
double  scale 
)

Give the layer tree model hints about the currently associated map view so that legend nodes that use map units can be scaled currectly.

Note
added in 2.6

Definition at line 586 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::setRootGroup ( QgsLayerTreeGroup newRootGroup)

Reset the model and use a new root group node.

Note
added in 2.6

Definition at line 457 of file qgslayertreemodel.cpp.

Qt::DropActions QgsLayerTreeModel::supportedDropActions ( ) const
override

Definition at line 884 of file qgslayertreemodel.cpp.

bool QgsLayerTreeModel::testFlag ( QgsLayerTreeModel::Flag  f) const

Check whether a flag is enabled.

Definition at line 994 of file qgslayertreemodel.cpp.

void QgsLayerTreeModel::tryBuildLegendTree ( LayerLegendData data)
protected

Definition at line 1124 of file qgslayertreemodel.cpp.

Member Data Documentation

int QgsLayerTreeModel::mAutoCollapseLegendNodesCount
protected

Minimal number of nodes when legend should be automatically collapsed. -1 = disabled.

Definition at line 249 of file qgslayertreemodel.h.

QPersistentModelIndex QgsLayerTreeModel::mCurrentIndex
protected

Current index - will be underlined.

Definition at line 247 of file qgslayertreemodel.h.

Flags QgsLayerTreeModel::mFlags
protected

Set of flags for the model.

Definition at line 245 of file qgslayertreemodel.h.

QFont QgsLayerTreeModel::mFontGroup
protected

Definition at line 287 of file qgslayertreemodel.h.

QFont QgsLayerTreeModel::mFontLayer
protected

Definition at line 286 of file qgslayertreemodel.h.

QMap<QString, QString> QgsLayerTreeModel::mLayerStyleOverrides
protected

Overrides of map layers' styles: key = layer ID, value = style XML.

This allows to show legend that is different from the current style of layers

Definition at line 281 of file qgslayertreemodel.h.

QMap<QgsLayerTreeLayer*, LayerLegendData> QgsLayerTreeModel::mLegend
protected

Per layer data about layer's legend nodes.

Definition at line 284 of file qgslayertreemodel.h.

QScopedPointer<QgsMapHitTest> QgsLayerTreeModel::mLegendFilterByMapHitTest
protected

Definition at line 293 of file qgslayertreemodel.h.

QScopedPointer<QgsMapSettings> QgsLayerTreeModel::mLegendFilterByMapSettings
protected

Definition at line 292 of file qgslayertreemodel.h.

double QgsLayerTreeModel::mLegendFilterByScale
protected

scale denominator for filtering of legend nodes (<= 0 means no filtering)

Definition at line 290 of file qgslayertreemodel.h.

int QgsLayerTreeModel::mLegendMapViewDpi
protected

Definition at line 296 of file qgslayertreemodel.h.

double QgsLayerTreeModel::mLegendMapViewMupp
protected

Definition at line 295 of file qgslayertreemodel.h.

double QgsLayerTreeModel::mLegendMapViewScale
protected

Definition at line 297 of file qgslayertreemodel.h.

QgsLayerTreeGroup* QgsLayerTreeModel::mRootNode
protected

Pointer to the root node of the layer tree. Not owned by the model.

Definition at line 243 of file qgslayertreemodel.h.


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