qgsmaptooldigitizefeature.cpp

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/***************************************************************************
  qgsmaptooldigitizefeature.cpp
 
 ---------------------
 begin                : 7.12.2017
 copyright            : (C) 2017 by David Signer
 email                : [email protected]
 ***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
 
#include "qgsmaptooldigitizefeature.h"
#include "qgsadvanceddigitizingdockwidget.h"
#include "qgsfields.h"
#include "qgsgeometry.h"
#include "qgsmapcanvas.h"
#include "qgsmapmouseevent.h"
#include "qgsproject.h"
#include "qgssettingsregistrycore.h"
#include "qgsvectordataprovider.h"
#include "qgsvectorlayer.h"
#include "qgssettingsentryimpl.h"
 
#include <QSettings>
 
QgsMapToolDigitizeFeature::QgsMapToolDigitizeFeature( QgsMapCanvas *canvas, QgsAdvancedDigitizingDockWidget *cadDockWidget, CaptureMode mode )
  : QgsMapToolCaptureLayerGeometry( canvas, cadDockWidget, mode )
  , mCheckGeometryType( true )
{
  mToolName = tr( "Digitize feature" );
  connect( QgsProject::instance(), &QgsProject::cleared, this, &QgsMapToolDigitizeFeature::stopCapturing );
  connect( QgsProject::instance(), &QgsProject::readProject, this, &QgsMapToolDigitizeFeature::stopCapturing );
}
 
QgsMapToolCapture::Capabilities QgsMapToolDigitizeFeature::capabilities() const
{
  return QgsMapToolCapture::SupportsCurves | QgsMapToolCapture::ValidateGeometries;
}
 
bool QgsMapToolDigitizeFeature::supportsTechnique( Qgis::CaptureTechnique technique ) const
{
  switch ( technique )
  {
    case Qgis::CaptureTechnique::StraightSegments:
      return true;
    case Qgis::CaptureTechnique::CircularString:
    case Qgis::CaptureTechnique::Streaming:
    case Qgis::CaptureTechnique::Shape:
      return mode() != QgsMapToolCapture::CapturePoint;
  }
  return false;
}
 
void QgsMapToolDigitizeFeature::layerGeometryCaptured( const QgsGeometry &geometry )
{
  QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( mLayer );
  if ( !vlayer )
    vlayer = currentVectorLayer();
 
  if ( !vlayer )
    return;
 
  QgsFeature f( vlayer->fields(), 0 );
 
  if ( vlayer->isSpatial() )
  {
    const Qgis::WkbType layerWKBType = vlayer->wkbType();
 
    QgsGeometry layerGeometry;
 
    if ( mCheckGeometryType )
    {
      double defaultZ = QgsSettingsRegistryCore::settingsDigitizingDefaultZValue->value();
      double defaultM = QgsSettingsRegistryCore::settingsDigitizingDefaultMValue->value();
      QVector<QgsGeometry> layerGeometries = geometry.coerceToType( layerWKBType, defaultZ, defaultM );
      if ( layerGeometries.count() > 0 )
        layerGeometry = layerGeometries.at( 0 );
 
      if ( layerGeometry.wkbType() != layerWKBType && layerGeometry.wkbType() != QgsWkbTypes::linearType( layerWKBType ) )
      {
        emit messageEmitted( tr( "The digitized geometry type (%1) does not correspond to the layer geometry type (%2)." ).arg( QgsWkbTypes::displayString( layerGeometry.wkbType() ), QgsWkbTypes::displayString( layerWKBType ) ), Qgis::MessageLevel::Warning );
        return;
      }
    }
    else
    {
      layerGeometry = geometry;
    }
    f.setGeometry( layerGeometry );
  }
  f.setValid( true );
  emit digitizingCompleted( f );
  featureDigitized( f );
}
 
void QgsMapToolDigitizeFeature::activate()
{
  QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( mLayer );
  if ( !vlayer )
    vlayer = currentVectorLayer();
 
  if ( vlayer && vlayer->geometryType() == Qgis::GeometryType::Null )
  {
    setCursor( QCursor( Qt::ArrowCursor ) );
    layerGeometryCaptured( QgsGeometry() );
    return;
  }
 
  if ( mLayer )
  {
    //remember current layer
    mCurrentLayer = mCanvas->currentLayer();
    //set the layer with the given
    mCanvas->setCurrentLayer( mLayer );
  }
 
  QgsMapToolCaptureLayerGeometry::activate();
}
 
void QgsMapToolDigitizeFeature::deactivate()
{
  QgsMapToolCaptureLayerGeometry::deactivate();
 
  if ( mCurrentLayer )
    //set the layer back to the one remembered
    mCanvas->setCurrentLayer( mCurrentLayer );
  emit digitizingFinished();
}
 
void QgsMapToolDigitizeFeature::reactivate()
{
  QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( mLayer );
  if ( !vlayer )
    vlayer = currentVectorLayer();
 
  if ( vlayer && vlayer->geometryType() == Qgis::GeometryType::Null )
  {
    layerGeometryCaptured( QgsGeometry() );
  }
}
 
void QgsMapToolDigitizeFeature::keyPressEvent( QKeyEvent *e )
{
  if ( e->key() == Qt::Key_Escape )
  {
    emit digitizingCanceled();
  }
  QgsMapToolCaptureLayerGeometry::keyPressEvent( e );
}
 
bool QgsMapToolDigitizeFeature::checkGeometryType() const
{
  return mCheckGeometryType;
}
 
void QgsMapToolDigitizeFeature::setCheckGeometryType( bool checkGeometryType )
{
  mCheckGeometryType = checkGeometryType;
}
 
void QgsMapToolDigitizeFeature::cadCanvasReleaseEvent( QgsMapMouseEvent *e )
{
  QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( mLayer );
 
  if ( !vlayer )
    //if no given layer take the current from canvas
    vlayer = currentVectorLayer();
 
  if ( !vlayer )
  {
    notifyNotVectorLayer();
    return;
  }
 
  QgsVectorDataProvider *provider = vlayer->dataProvider();
 
  if ( !( provider->capabilities() & Qgis::VectorProviderCapability::AddFeatures ) )
  {
    emit messageEmitted( tr( "The data provider for this layer does not support the addition of features." ), Qgis::MessageLevel::Warning );
    return;
  }
 
  if ( !vlayer->isEditable() )
  {
    notifyNotEditableLayer();
    return;
  }
 
  //check we only use this tool for point/multipoint layers
  if ( mode() == CapturePoint && vlayer->geometryType() != Qgis::GeometryType::Point && mCheckGeometryType )
  {
    emit messageEmitted( tr( "Wrong editing tool, cannot apply the 'capture point' tool on this vector layer" ), Qgis::MessageLevel::Warning );
    return;
  }
 
  //check we only use the line tool for line/multiline layers
  if ( mode() == CaptureLine && vlayer->geometryType() != Qgis::GeometryType::Line && mCheckGeometryType )
  {
    emit messageEmitted( tr( "Wrong editing tool, cannot apply the 'capture line' tool on this vector layer" ), Qgis::MessageLevel::Warning );
    return;
  }
 
  //check we only use the polygon tool for polygon/multipolygon layers
  if ( mode() == CapturePolygon && vlayer->geometryType() != Qgis::GeometryType::Polygon && mCheckGeometryType )
  {
    emit messageEmitted( tr( "Wrong editing tool, cannot apply the 'capture polygon' tool on this vector layer" ), Qgis::MessageLevel::Warning );
    return;
  }
 
  QgsMapToolCaptureLayerGeometry::cadCanvasReleaseEvent( e );
}
 
void QgsMapToolDigitizeFeature::setLayer( QgsMapLayer *vl )
{
  mLayer = vl;
}