/usr/include/qgis/qgssearchstring.h is in libqgis-dev 1.7.4+1.7.5~20120320-1.1+b1.
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qgssearchstring.h
interface for parsing and evaluation of search strings
--------------------
begin : 2005-07-26
copyright : (C) 2005 by Martin Dobias
email : won.der at centrum.sk
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
/* $Id$ */
#ifndef QGSSEARCHSTRING_H
#define QGSSEARCHSTRING_H
#include <QString>
class QgsSearchTreeNode;
/** \ingroup core
* A class to represent a search string.
* - interface for 'search string' parser
* - when a string is set, it parses it and creates parsed tree of it
* - owns node tree and coresponding search string
* - keeps string and node tree always in sync
*
*/
class CORE_EXPORT QgsSearchString
{
public:
//! construct an empty string
QgsSearchString();
//! construct and parse a string
//! @note added in v1.6
QgsSearchString( const QString & str );
//! copy constructor - makes also copy of search tree
QgsSearchString( const QgsSearchString& str );
//! destructor - deletes node tree
~QgsSearchString();
//! assignment operator takes care to copy search tree correctly
QgsSearchString& operator=( const QgsSearchString& str );
/** sets search string and parses search tree
on success returns true and sets member variables to the new values */
bool setString( QString str );
/* copies tree and makes search string for it
on success returns true and sets member variables to the new values */
bool setTree( QgsSearchTreeNode* tree );
//! getter functions
QgsSearchTreeNode* tree() { return mTree; }
QString string() { return mString; }
//! returns parser error message - valid only after unsuccessfull parsing
const QString& parserErrorMsg() { return mParserErrorMsg; }
//! returns true if no string is set
bool isEmpty();
//! clear search string
void clear();
private:
//! search string and coresponding tree
QgsSearchTreeNode* mTree;
QString mString;
//! error message from parser
QString mParserErrorMsg;
};
#endif
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