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[layertree] Update layer tree view when a tree node changes the expanded state

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This commit is contained in:
Martin Dobias 2014-06-17 12:20:10 +07:00
parent e4dd900854
commit b134c254f3
5 changed files with 34 additions and 2 deletions
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2
python/core/layertree/qgslayertreenode.sip
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@ -112,6 +112,8 @@ class QgsLayerTreeNode : QObject
void visibilityChanged( QgsLayerTreeNode* node, Qt::CheckState state );
//! Emitted when a custom property of a node within the tree has been changed or removed
void customPropertyChanged( QgsLayerTreeNode* node, QString key );
//! Emitted when the collapsed/expanded state of a node within the tree has been changed
void expandedChanged( QgsLayerTreeNode* node, bool expanded );
protected:

18
src/core/layertree/qgslayertreenode.cpp
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@ -58,6 +58,23 @@ QgsLayerTreeNode* QgsLayerTreeNode::readXML( QDomElement& element )
return node;
}
bool QgsLayerTreeNode::isExpanded() const
{
return mExpanded;
}
void QgsLayerTreeNode::setExpanded( bool expanded )
{
if ( mExpanded == expanded )
return;
mExpanded = expanded;
emit expandedChanged( this, expanded );
}
void QgsLayerTreeNode::setCustomProperty( const QString &key, const QVariant &value )
{
mProperties.setValue( key, value );
@ -115,6 +132,7 @@ void QgsLayerTreeNode::insertChildrenPrivate( int index, QList<QgsLayerTreeNode*
connect( nodes[i], SIGNAL( removedChildren( QgsLayerTreeNode*, int, int ) ), this, SIGNAL( removedChildren( QgsLayerTreeNode*, int, int ) ) );
connect( nodes[i], SIGNAL( customPropertyChanged( QgsLayerTreeNode*, QString ) ), this, SIGNAL( customPropertyChanged( QgsLayerTreeNode*, QString ) ) );
connect( nodes[i], SIGNAL( visibilityChanged( QgsLayerTreeNode*, Qt::CheckState ) ), this, SIGNAL( visibilityChanged( QgsLayerTreeNode*, Qt::CheckState ) ) );
connect( nodes[i], SIGNAL( expandedChanged( QgsLayerTreeNode*, bool ) ), this, SIGNAL( expandedChanged( QgsLayerTreeNode*, bool ) ) );
}
emit addedChildren( this, index, indexTo );
}

6
src/core/layertree/qgslayertreenode.h
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@ -92,9 +92,9 @@ class CORE_EXPORT QgsLayerTreeNode : public QObject
virtual QgsLayerTreeNode* clone() const = 0;
//! Return whether the node should be shown as expanded or collapsed in GUI
bool isExpanded() const { return mExpanded; }
bool isExpanded() const;
//! Set whether the node should be shown as expanded or collapsed in GUI
void setExpanded( bool expanded ) { mExpanded = expanded; }
void setExpanded( bool expanded );
/** Set a custom property for the node. Properties are stored in a map and saved in project file. */
void setCustomProperty( const QString& key, const QVariant& value );
@ -119,6 +119,8 @@ class CORE_EXPORT QgsLayerTreeNode : public QObject
void visibilityChanged( QgsLayerTreeNode* node, Qt::CheckState state );
//! Emitted when a custom property of a node within the tree has been changed or removed
void customPropertyChanged( QgsLayerTreeNode* node, QString key );
//! Emitted when the collapsed/expanded state of a node within the tree has been changed
void expandedChanged( QgsLayerTreeNode* node, bool expanded );
protected:

9
src/gui/layertree/qgslayertreeview.cpp
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@ -57,6 +57,8 @@ void QgsLayerTreeView::setModel( QAbstractItemModel* model )
QTreeView::setModel( model );
connect( layerTreeModel()->rootGroup(), SIGNAL( expandedChanged( QgsLayerTreeNode*, bool ) ), this, SLOT( onExpandedChanged( QgsLayerTreeNode*, bool ) ) );
connect( selectionModel(), SIGNAL( currentChanged( QModelIndex, QModelIndex ) ), this, SLOT( onCurrentChanged() ) );
updateExpandedStateFromNode( layerTreeModel()->rootGroup() );
@ -163,6 +165,13 @@ void QgsLayerTreeView::onCurrentChanged()
emit currentLayerChanged( layerCurrent );
}
void QgsLayerTreeView::onExpandedChanged( QgsLayerTreeNode* node, bool expanded )
{
QModelIndex idx = layerTreeModel()->node2index( node );
if ( isExpanded( idx ) != expanded )
setExpanded( idx, expanded );
}
void QgsLayerTreeView::updateExpandedStateFromNode( QgsLayerTreeNode* node )
{
QModelIndex idx = layerTreeModel()->node2index( node );

1
src/gui/layertree/qgslayertreeview.h
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@ -104,6 +104,7 @@ class GUI_EXPORT QgsLayerTreeView : public QTreeView
void updateExpandedStateToNode( QModelIndex index );
void onCurrentChanged();
void onExpandedChanged( QgsLayerTreeNode* node, bool expanded );
protected:
//! helper class with default actions. Lazily initialized.