/usr/include/qgis/qgslayertree.h is in libqgis-dev 2.4.0-1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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qgslayertree.h
--------------------------------------
Date : May 2014
Copyright : (C) 2014 by Martin Dobias
Email : wonder dot sk at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef QGSLAYERTREE_H
#define QGSLAYERTREE_H
#include "qgslayertreenode.h"
#include "qgslayertreegroup.h"
#include "qgslayertreelayer.h"
/**
* Namespace with helper functions for layer tree operations.
*
* Only generally useful routines should be here. Miscellaneous utility functions for work
* with the layer tree are in QgsLayerTreeUtils class.
*
* @note added in 2.4
*/
namespace QgsLayerTree
{
//! Check whether the node is a valid group node
inline bool isGroup( QgsLayerTreeNode* node )
{
return node && node->nodeType() == QgsLayerTreeNode::NodeGroup;
}
//! Check whether the node is a valid layer node
inline bool isLayer( QgsLayerTreeNode* node )
{
return node && node->nodeType() == QgsLayerTreeNode::NodeLayer;
}
//! Cast node to a group. No type checking is done - use isGroup() to find out whether this operation is legal.
inline QgsLayerTreeGroup* toGroup( QgsLayerTreeNode* node )
{
return static_cast<QgsLayerTreeGroup*>( node );
}
//! Cast node to a layer. No type checking is done - use isLayer() to find out whether this operation is legal.
inline QgsLayerTreeLayer* toLayer( QgsLayerTreeNode* node )
{
return static_cast<QgsLayerTreeLayer*>( node );
}
}
#endif // QGSLAYERTREE_H
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