QGIS API Documentation  2.99.0-Master (19b062c)
qgsmaptoolidentifyfeature.cpp
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1 /***************************************************************************
2  qgsmaptoolidentifyfeature.cpp
3  --------------------------------------
4  Date : 22.5.2014
5  Copyright : (C) 2014 Denis Rouzaud
6  Email : denis.rouzaud@gmail.com
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 
16 #include <QMouseEvent>
17 
19 #include "qgsmapcanvas.h"
20 
22  : QgsMapToolIdentify( canvas )
23  , mCanvas( canvas )
24  , mLayer( vl )
25 {
26  mToolName = tr( "Identify feature" );
27 
28  // set cursor
29  mCursor = QCursor( Qt::CrossCursor );
30 }
31 
33 {
34 
35  QgsPointXY point = mCanvas->getCoordinateTransform()->toMapCoordinates( e->x(), e->y() );
36 
37  QList<IdentifyResult> results;
38  if ( !identifyVectorLayer( &results, mLayer, point ) )
39  return;
40 
41  // TODO: display a menu when several features identified
42 
43  emit featureIdentified( results[0].mFeature );
44  emit featureIdentified( results[0].mFeature.id() );
45 }
46 
48 {
49  if ( e->key() == Qt::Key_Escape )
50  {
51  mCanvas->unsetMapTool( this );
52  }
53 }
void unsetMapTool(QgsMapTool *mapTool)
Unset the current map tool or last non zoom tool.
A class to represent a 2D point.
Definition: qgspointxy.h:43
A QgsMapMouseEvent is the result of a user interaction with the mouse on a QgsMapCanvas.
virtual void keyPressEvent(QKeyEvent *e) override
Key event for overriding. Default implementation does nothing.
Map canvas is a class for displaying all GIS data types on a canvas.
Definition: qgsmapcanvas.h:74
QString mToolName
translated name of the map tool
Definition: qgsmaptool.h:254
QCursor mCursor
cursor used in map tool
Definition: qgsmaptool.h:239
Map tool for identifying features in layers.
bool identifyVectorLayer(QList< QgsMapToolIdentify::IdentifyResult > *results, QgsVectorLayer *layer, const QgsPointXY &point)
QgsMapToolIdentifyFeature(QgsMapCanvas *canvas, QgsVectorLayer *vl=nullptr)
QgsMapToolIdentifyFeature is a map tool to identify a feature on a chosen layer.
virtual void canvasReleaseEvent(QgsMapMouseEvent *e) override
Mouse release event for overriding. Default implementation does nothing.
void featureIdentified(const QgsFeature &)
const QgsMapToPixel * getCoordinateTransform()
Get the current coordinate transform.
Represents a vector layer which manages a vector based data sets.
QgsPointXY toMapCoordinates(int x, int y) const