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qgsmaptoolidentify.h
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qgsmaptoolidentify.h
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/***************************************************************************
qgsmaptoolidentify.h - map tool for identifying features
---------------------
begin : January 2006
copyright : (C) 2006 by Martin Dobias
email : wonder.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. *
* *
***************************************************************************/
/* $Id$ */
#ifndef QGSMAPTOOLIDENTIFY_H
#define QGSMAPTOOLIDENTIFY_H
#include "qgis.h"
#include "qgsmaptool.h"
#include "qgspoint.h"
#include "qgsfeature.h"
#include "qgsdistancearea.h"
#include <QObject>
class QgsIdentifyResults;
class QgsMapLayer;
class QgsRasterLayer;
class QgsRubberBand;
class QgsVectorLayer;
/**
\brief Map tool for identifying features in current layer
after selecting a point shows dialog with identification results
- for raster layers shows value of underlying pixel
- for vector layers shows feature attributes within search radius
(allows to edit values when vector layer is in editing mode)
*/
class QgsMapToolIdentify : public QgsMapTool
{
Q_OBJECT
public:
QgsMapToolIdentify( QgsMapCanvas* canvas );
~QgsMapToolIdentify();
//! Overridden mouse move event
virtual void canvasMoveEvent( QMouseEvent * e );
//! Overridden mouse press event
virtual void canvasPressEvent( QMouseEvent * e );
//! Overridden mouse release event
virtual void canvasReleaseEvent( QMouseEvent * e );
virtual void activate();
virtual void deactivate();
signals:
void identifyProgress( int, int );
void identifyMessage( QString );
private:
bool identifyLayer( QgsMapLayer *layer, int x, int y );
bool identifyRasterLayer( QgsRasterLayer *layer, int x, int y );
bool identifyVectorLayer( QgsVectorLayer *layer, int x, int y );
//! Pointer to the identify results dialog for name/value pairs
QgsIdentifyResults *mResults;
//! Private helper
void convertMeasurement( QgsDistanceArea &calc, double &measure, QGis::UnitType &u, bool isArea );
void addFeature( QgsMapLayer *layer, int fid,
QString displayField, QString displayValue,
const QMap< QString, QString > &attributes,
const QMap< QString, QString > &derivedAttributes );
private slots:
// Let us know when the QgsIdentifyResults dialog box has been closed
void resultsDialogGone();
};
#endif