void QgsMeasureDialog::mouseMove( QgsPoint &point )
{
QSettings settings;
int decimalPlaces = settings.value( "/qgis/measure/decimalplaces", "3" ).toInt();
// Create QgsDistance Area for customization ProjectionEnabled setting
QgsDistanceArea myDa;
configureDistanceArea( myDa );
// show current distance/area while moving the point
// by creating a temporary copy of point array
// and adding moving point at the end
if ( mMeasureArea && mTool->points().size() > 1 )
{
QList<QgsPoint> tmpPoints = mTool->points();
tmpPoints.append( point );
double area = myDa.measurePolygon( tmpPoints );
editTotal->setText( formatArea( area, decimalPlaces ) );
}
else if ( !mMeasureArea && mTool->points().size() > 0 )
{
QgsPoint p1( mTool->points().last() ), p2( point );
double d = myDa.measureLine( p1, p2 );
editTotal->setText( formatDistance( mTotal + d, decimalPlaces ) );
QGis::UnitType myDisplayUnits;
// Ignore units
convertMeasurement( d, myDisplayUnits, false );
QTreeWidgetItem *item = mTable->topLevelItem( mTable->topLevelItemCount() - 1 );
item->setText( 0, QLocale::system().toString( d, 'f', decimalPlaces ) );
}
}
void GlobePlugin::syncExtent()
{
QgsMapCanvas* mapCanvas = mQGisIface->mapCanvas();
QgsMapRenderer* mapRenderer = mapCanvas->mapRenderer();
QgsRectangle extent = mapCanvas->extent();
osgEarth::Util::EarthManipulator* manip = dynamic_cast<osgEarth::Util::EarthManipulator*>( mOsgViewer->getCameraManipulator() );
//rotate earth to north and perpendicular to camera
manip->setRotation( osg::Quat() );
QgsDistanceArea dist;
dist.setSourceCrs( mapRenderer->destinationCrs().srsid() );
dist.setEllipsoidalMode( mapRenderer->hasCrsTransformEnabled() );
dist.setEllipsoid( QgsProject::instance()->readEntry( "Measure", "/Ellipsoid", GEO_NONE ) );
QgsPoint ll = QgsPoint( extent.xMinimum(), extent.yMinimum() );
QgsPoint ul = QgsPoint( extent.xMinimum(), extent.yMaximum() );
double height = dist.measureLine( ll, ul );
//camera viewing angle
double viewAngle = 30;
//camera distance
double distance = height / tan( viewAngle * osg::PI / 180 ); //c = b*cotan(B(rad))
OE_NOTICE << "map extent: " << height << " camera distance: " << distance << std::endl;
osgEarth::Util::Viewpoint viewpoint( osg::Vec3d( extent.center().x(), extent.center().y(), 0.0 ), 0.0, -90.0, distance );
manip->setViewpoint( viewpoint, 4.0 );
}
double QgsComposerScaleBar::mapWidth() const
{
if ( !mComposerMap )
{
return 0.0;
}
QgsRectangle composerMapRect = *( mComposerMap->currentMapExtent() );
if ( mUnits == MapUnits )
{
return composerMapRect.width();
}
else
{
QgsDistanceArea da;
da.setEllipsoidalMode( mComposition->mapSettings().hasCrsTransformEnabled() );
da.setSourceCrs( mComposition->mapSettings().destinationCrs().srsid() );
da.setEllipsoid( QgsProject::instance()->readEntry( "Measure", "/Ellipsoid", "WGS84" ) );
double measure = da.measureLine( QgsPoint( composerMapRect.xMinimum(), composerMapRect.yMinimum() ), QgsPoint( composerMapRect.xMaximum(), composerMapRect.yMinimum() ) );
if ( mUnits == QgsComposerScaleBar::Feet )
{
measure /= QGis::fromUnitToUnitFactor( QGis::Feet, QGis::Meters );
}
else if ( mUnits == QgsComposerScaleBar::NauticalMiles )
{
measure /= QGis::fromUnitToUnitFactor( QGis::NauticalMiles, QGis::Meters );
}
return measure;
}
}
double QgsComposerScaleBar::mapWidth() const
{
if ( !mComposerMap )
{
return 0.0;
}
QgsRectangle composerMapRect = mComposerMap->extent();
if ( mUnits == MapUnits )
{
return composerMapRect.width();
}
else
{
QgsDistanceArea da;
da.setEllipsoidalMode( mComposerMap->mapRenderer()->hasCrsTransformEnabled() );
da.setSourceCrs( mComposerMap->mapRenderer()->destinationCrs().srsid() );
da.setEllipsoid( QgsProject::instance()->readEntry( "Measure", "/Ellipsoid", "WGS84" ) );
double measure = da.measureLine( QgsPoint( composerMapRect.xMinimum(), composerMapRect.yMinimum() ), QgsPoint( composerMapRect.xMaximum(), composerMapRect.yMinimum() ) );
if ( mUnits == Feet )
{
measure /= 0.3048;
}
return measure;
}
}
double QgsComposerScaleBar::mapDiagonal() const
{
if ( !mComposerMap )
{
return 0.0;
}
QgsRectangle composerMapRect = mComposerMap->extent();
if ( mUnits == MapUnits )
{
return sqrt( composerMapRect.width() * composerMapRect.width() + composerMapRect.height() * composerMapRect.height() );
}
else
{
QgsDistanceArea da;
da.setProjectionsEnabled( true );
da.setSourceCrs( mComposerMap->mapRenderer()->destinationCrs().srsid() );
QSettings s;
da.setEllipsoid( s.value( "/qgis/measure/ellipsoid", "WGS84" ).toString() );
double measure = da.measureLine( QgsPoint( composerMapRect.xMinimum(), composerMapRect.yMaximum() ), QgsPoint( composerMapRect.xMaximum(), composerMapRect.yMinimum() ) );
if ( mUnits == Feet )
{
measure /= 0.3048;
}
return measure;
}
}
double QgsLayoutItemScaleBar::mapWidth() const
{
if ( !mMap )
{
return 0.0;
}
QgsRectangle mapExtent = mMap->extent();
if ( mSettings.units() == QgsUnitTypes::DistanceUnknownUnit )
{
return mapExtent.width();
}
else
{
QgsDistanceArea da;
da.setSourceCrs( mMap->crs(), mLayout->project()->transformContext() );
da.setEllipsoid( mLayout->project()->ellipsoid() );
QgsUnitTypes::DistanceUnit units = da.lengthUnits();
double measure = da.measureLine( QgsPointXY( mapExtent.xMinimum(), mapExtent.yMinimum() ),
QgsPointXY( mapExtent.xMaximum(), mapExtent.yMinimum() ) );
measure /= QgsUnitTypes::fromUnitToUnitFactor( mSettings.units(), units );
return measure;
}
}
void GlobePlugin::syncExtent()
{
osgEarth::Util::EarthManipulator* manip = dynamic_cast<osgEarth::Util::EarthManipulator*>( mOsgViewer->getCameraManipulator() );
//rotate earth to north and perpendicular to camera
manip->setRotation( osg::Quat() );
//get mapCanvas->extent().height() in meters
QgsRectangle extent = mQGisIface->mapCanvas()->extent();
QgsDistanceArea dist;
dist.setEllipsoidalMode( true );
//dist.setProjectionsEnabled( true );
QgsPoint ll = QgsPoint( extent.xMinimum(), extent.yMinimum() );
QgsPoint ul = QgsPoint( extent.xMinimum(), extent.yMaximum() );
double height = dist.measureLine( ll, ul );
//camera viewing angle
double viewAngle = 30;
//camera distance
double distance = height / tan( viewAngle * osg::PI / 180 ); //c = b*cotan(B(rad))
OE_NOTICE << "map extent: " << height << " camera distance: " << distance << std::endl;
osgEarth::Util::Viewpoint viewpoint( osg::Vec3d( extent.center().x(), extent.center().y(), 0.0 ), 0.0, -90.0, distance );
manip->setViewpoint( viewpoint, 4.0 );
}
double Heatmap::mapUnitsOf( double meters, QgsCoordinateReferenceSystem layerCrs )
{
// Worker to transform metres input to mapunits
QgsDistanceArea da;
da.setSourceCrs( layerCrs.srsid() );
da.setEllipsoid( layerCrs.ellipsoidAcronym() );
if ( da.geographic() )
{
da.setEllipsoidalMode( true );
}
return meters / da.measureLine( QgsPoint( 0.0, 0.0 ), QgsPoint( 0.0, 1.0 ) );
}
void TestQgsDistanceArea::basic()
{
QgsPoint p1( 1.0, 3.0 ), p2( -2.0, -1.0 );
QgsDistanceArea daA;
double resultA, resultB, resultC;
daA.setEllipsoid( GEO_NONE );
resultA = daA.measureLine( p1, p2 );
QCOMPARE( resultA, 5.0 );
// Now, on an ellipsoid. Always less?
daA.setSourceCrs( 3006 );
daA.setEllipsoid( "WGS84" );
daA.setEllipsoidalMode( true );
resultA = daA.measureLine( p1, p2 );
QVERIFY( resultA < 5.0 );
// Test copy constructor
QgsDistanceArea daB( daA );
resultB = daB.measureLine( p1, p2 );
QCOMPARE( resultA, resultB );
// Different Ellipsoid
daB.setEllipsoid( "WGS72" );
resultB = daB.measureLine( p1, p2 );
QVERIFY( ! qFuzzyCompare( resultA, resultB ) );
// Test assignment
QSharedPointer<QgsDistanceArea> daC( new QgsDistanceArea );
*daC = daB;
resultC = daC->measureLine( p1, p2 );
QCOMPARE( resultB, resultC );
// Use parameter setting of ellipsoid radii (from WGS72 )
daA.setEllipsoid( 6378135.0, 6378135.0 - ( 6378135.0 / 298.26 ) );
resultA = daA.measureLine( p1, p2 );
QCOMPARE( resultA, resultB );
}
void TestQgsDistanceArea::measureUnits()
{
//test regression #13610
QgsDistanceArea calc;
calc.setEllipsoidalMode( false );
calc.setEllipsoid( "NONE" );
calc.setSourceCrs( 254L );
QGis::UnitType units;
QgsPoint p1( 1341683.9854275715, 408256.9562717728 );
QgsPoint p2( 1349321.7807031618, 408256.9562717728 );
double result = calc.measureLine( p1, p2, units );
//no OTF, result will be in CRS unit (feet)
QCOMPARE( units, QGis::Feet );
QVERIFY( qgsDoubleNear( result, 7637.7952755903825, 0.001 ) );
calc.setEllipsoidalMode( true );
calc.setEllipsoid( "WGS84" );
result = calc.measureLine( p1, p2, units );
//OTF, result will be in meters
QCOMPARE( units, QGis::Meters );
QVERIFY( qgsDoubleNear( result, 2328.0988253106957, 0.001 ) );
}
double HeatmapGui::mapUnitsOf( double dist, const QgsCoordinateReferenceSystem& layerCrs ) const
{
// converter function to transform layer input to mapunits
// so that bounding box can be updated
QgsDistanceArea da;
da.setSourceCrs( layerCrs.srsid() );
da.setEllipsoid( layerCrs.ellipsoidAcronym() );
if ( da.geographic() )
{
da.setEllipsoidalMode( true );
}
double unitDistance = da.measureLine( QgsPoint( 0.0, 0.0 ), QgsPoint( 0.0, 1.0 ) );
QgsDebugMsg( QString( "Converted %1 layer to %2 map units" ).arg( dist ).arg( dist / unitDistance ) );
return dist / unitDistance;
}
void TestQgsDistanceArea::test_distances()
{
// Read the file of Geod data
// Column 0 (first) is latitude point 1
// Column 1 is longitude point 1
// Column 3 is latitude point 2
// Column 4 is longitude point 3
// Column 6 is the resulting distance in meters on the WGS84 ellipsoid
// Note: lat is north/south, so the QgsPoint should be ( long, lat )
// See http://geographiclib.sourceforge.net/html/geodesic.html#testgeod
// Set up DA
QgsDistanceArea myDa;
myDa.setSourceAuthId( "EPSG:4030" );
myDa.setEllipsoidalMode( true );
myDa.setEllipsoid( "WGS84" );
QString myFileName = QString( TEST_DATA_DIR ) + "/GeodTest-nano.dat";
QFile myFile( myFileName );
if ( ! myFile.open( QIODevice::ReadOnly | QIODevice::Text ) )
{
QFAIL( "Couldn't open file" );
return;
}
QTextStream in( & myFile );
while ( !in.atEnd() )
{
QString line = in.readLine();
// Some test points (antipodal) does not converge with the chosen algorithm!
// See calcaulator at http://www.movable-type.co.uk/scripts/latlong-vincenty.html
// These are commented out.
if ( line[0] != '#' )
{
QStringList myLineList = line.split( ' ' ); // Split fields on space.
// Create points
QgsPoint p1( myLineList[1].toDouble(), myLineList[0].toDouble() );
QgsPoint p2( myLineList[4].toDouble(), myLineList[3].toDouble() );
double result = myDa.measureLine( p1, p2 );
// QgsDebugMsg( QString( "Distance from %1 to %2 is %3" ).arg( p1.toString( 15 ) ).arg( p2.toString( 15 ) ).arg( result, 0, 'g', 15 ) );
// QgsDebugMsg( QString( "Distance should be %1" ).arg( myLineList[6] ) );
// Check result is less than 0.5mm from expected.
QVERIFY( qAbs( result - myLineList[6].toDouble() ) < 0.0005 );
}
}
}
void GlobePlugin::syncExtent()
{
QgsMapCanvas* mapCanvas = mQGisIface->mapCanvas();
const QgsMapSettings &mapSettings = mapCanvas->mapSettings();
QgsRectangle extent = mapCanvas->extent();
long epsgGlobe = 4326;
QgsCoordinateReferenceSystem globeCrs;
globeCrs.createFromOgcWmsCrs( QString( "EPSG:%1" ).arg( epsgGlobe ) );
// transform extent to WGS84
if ( mapSettings.destinationCrs().authid().compare( QString( "EPSG:%1" ).arg( epsgGlobe ), Qt::CaseInsensitive ) != 0 )
{
QgsCoordinateReferenceSystem srcCRS( mapSettings.destinationCrs() );
QgsCoordinateTransform* coordTransform = new QgsCoordinateTransform( srcCRS, globeCrs );
extent = coordTransform->transformBoundingBox( extent );
delete coordTransform;
}
osgEarth::Util::EarthManipulator* manip = dynamic_cast<osgEarth::Util::EarthManipulator*>( mOsgViewer->getCameraManipulator() );
//rotate earth to north and perpendicular to camera
manip->setRotation( osg::Quat() );
QgsDistanceArea dist;
dist.setSourceCrs( globeCrs );
dist.setEllipsoidalMode( true );
dist.setEllipsoid( "WGS84" );
QgsPoint ll = QgsPoint( extent.xMinimum(), extent.yMinimum() );
QgsPoint ul = QgsPoint( extent.xMinimum(), extent.yMaximum() );
double height = dist.measureLine( ll, ul );
//camera viewing angle
double viewAngle = 30;
//camera distance
double distance = height / tan( viewAngle * osg::PI / 180 ); //c = b*cotan(B(rad))
OE_NOTICE << "map extent: " << height << " camera distance: " << distance << std::endl;
osgEarth::Util::Viewpoint viewpoint( osg::Vec3d( extent.center().x(), extent.center().y(), 0.0 ), 0.0, -90.0, distance );
manip->setViewpoint( viewpoint, 4.0 );
}
double QgsComposerScaleBar::mapWidth() const
{
if ( !mComposerMap )
{
return 0.0;
}
QgsRectangle composerMapRect = *( mComposerMap->currentMapExtent() );
if ( mUnits == MapUnits )
{
return composerMapRect.width();
}
else
{
QgsDistanceArea da;
da.setEllipsoidalMode( mComposition->mapSettings().hasCrsTransformEnabled() );
da.setSourceCrs( mComposition->mapSettings().destinationCrs().srsid() );
da.setEllipsoid( mComposition->project()->ellipsoid() );
QgsUnitTypes::DistanceUnit units = QgsUnitTypes::DistanceMeters;
double measure = da.measureLine( QgsPoint( composerMapRect.xMinimum(), composerMapRect.yMinimum() ),
QgsPoint( composerMapRect.xMaximum(), composerMapRect.yMinimum() ),
units );
switch ( mUnits )
{
case QgsComposerScaleBar::Feet:
measure /= QgsUnitTypes::fromUnitToUnitFactor( QgsUnitTypes::DistanceFeet, units );
break;
case QgsComposerScaleBar::NauticalMiles:
measure /= QgsUnitTypes::fromUnitToUnitFactor( QgsUnitTypes::DistanceNauticalMiles, units );
break;
case QgsComposerScaleBar::Meters:
measure /= QgsUnitTypes::fromUnitToUnitFactor( QgsUnitTypes::DistanceMeters, units );
break;
case QgsComposerScaleBar::MapUnits:
//avoid warning
break;
}
return measure;
}
}
void QgsBullsEyeWidget::createLayer( QString layerName )
{
if ( layerName.isEmpty() )
{
layerName = QInputDialog::getText( this, tr( "Layer Name" ), tr( "Enter name of new layer:" ) );
}
if ( !layerName.isEmpty() )
{
QgsDistanceArea da;
da.setEllipsoid( "WGS84" );
da.setEllipsoidalMode( true );
da.setSourceCrs( mCanvas->mapSettings().destinationCrs() );
QgsRectangle extent = mCanvas->extent();
double extentHeight = da.measureLine( QgsPoint( extent.center().x(), extent.yMinimum() ), QgsPoint( extent.center().x(), extent.yMaximum() ) );
double interval = 0.5 * extentHeight * QGis::fromUnitToUnitFactor( QGis::Meters, QGis::NauticalMiles ) / 6; // Half height divided by nr rings+1, in nm
QgsBullsEyeLayer* bullEyeLayer = new QgsBullsEyeLayer( layerName );
bullEyeLayer->setup( mCanvas->extent().center(), mCanvas->mapSettings().destinationCrs(), 5, interval, 45 );
QgsMapLayerRegistry::instance()->addMapLayer( bullEyeLayer );
mLayerTreeView->setCurrentLayer( bullEyeLayer );
}
}
void QgsMeasureDialog::addPoint( QgsPoint &point )
{
QSettings settings;
int decimalPlaces = settings.value( "/qgis/measure/decimalplaces", "3" ).toInt();
// Create QgsDistance Area for customization ProjectionEnabled setting
QgsDistanceArea myDa;
configureDistanceArea( myDa );
int numPoints = mTool->points().size();
if ( mMeasureArea && numPoints > 2 )
{
double area = myDa.measurePolygon( mTool->points() );
editTotal->setText( formatArea( area, decimalPlaces ) );
}
else if ( !mMeasureArea && numPoints > 1 )
{
int last = numPoints - 2;
QgsPoint p1 = mTool->points()[last], p2 = mTool->points()[last+1];
double d = myDa.measureLine( p1, p2 );
mTotal += d;
editTotal->setText( formatDistance( mTotal, decimalPlaces ) );
QGis::UnitType myDisplayUnits;
// Ignore units
convertMeasurement( d, myDisplayUnits, false );
QTreeWidgetItem *item = mTable->topLevelItem( mTable->topLevelItemCount() - 1 );
item->setText( 0, QLocale::system().toString( d, 'f', decimalPlaces ) );
item = new QTreeWidgetItem( QStringList( QLocale::system().toString( 0.0, 'f', decimalPlaces ) ) );
item->setTextAlignment( 0, Qt::AlignRight );
mTable->addTopLevelItem( item );
mTable->scrollToItem( item );
}
}
bool QgsTransectSample::otherTransectWithinDistance( QgsGeometry* geom, double minDistLayerUnit, double minDistance, QgsSpatialIndex& sIndex,
const QMap< QgsFeatureId, QgsGeometry* >& lineFeatureMap, QgsDistanceArea& da )
{
if ( !geom )
{
return false;
}
QgsGeometry* buffer = geom->buffer( minDistLayerUnit, 8 );
if ( !buffer )
{
return false;
}
QgsRectangle rect = buffer->boundingBox();
QList<QgsFeatureId> lineIdList = sIndex.intersects( rect );
QList<QgsFeatureId>::const_iterator lineIdIt = lineIdList.constBegin();
for ( ; lineIdIt != lineIdList.constEnd(); ++lineIdIt )
{
const QMap< QgsFeatureId, QgsGeometry* >::const_iterator idMapIt = lineFeatureMap.find( *lineIdIt );
if ( idMapIt != lineFeatureMap.constEnd() )
{
double dist = 0;
QgsPoint pt1, pt2;
closestSegmentPoints( *geom, *( idMapIt.value() ), dist, pt1, pt2 );
dist = da.measureLine( pt1, pt2 ); //convert degrees to meters if necessary
if ( dist < minDistance )
{
delete buffer;
return true;
}
}
}
delete buffer;
return false;
}
void QgsMapToolViewshed::drawFinished()
{
QString layerid = QgsProject::instance()->readEntry( "Heightmap", "layer" );
QgsMapLayer* layer = QgsMapLayerRegistry::instance()->mapLayer( layerid );
if ( !layer || layer->type() != QgsMapLayer::RasterLayer )
{
QgisApp::instance()->messageBar()->pushMessage( tr( "No heightmap is defined in the project." ), tr( "Right-click a raster layer in the layer tree and select it to be used as heightmap." ), QgsMessageBar::INFO, 10 );
reset();
return;
}
QgsCoordinateReferenceSystem canvasCrs = canvas()->mapSettings().destinationCrs();
double curRadius;
QgsPoint center;
double trash;
getPart( 0, center, curRadius, trash, trash );
QGis::UnitType measureUnit = canvasCrs.mapUnits();
QgsDistanceArea().convertMeasurement( curRadius, measureUnit, QGis::Meters, false );
QgsViewshedDialog viewshedDialog( curRadius );
connect( &viewshedDialog, SIGNAL( radiusChanged( double ) ), this, SLOT( adjustRadius( double ) ) );
if ( viewshedDialog.exec() == QDialog::Rejected )
{
reset();
return;
}
QString outputFileName = QString( "viewshed_%1,%2.tif" ).arg( center.x() ).arg( center.y() );
QString outputFile = QgsTemporaryFile::createNewFile( outputFileName );
QVector<QgsPoint> filterRegion;
QgsPolygon poly = QgsGeometry( getRubberBand()->geometry()->clone() ).asPolygon();
if ( !poly.isEmpty() )
{
filterRegion = poly.front();
}
getPart( 0, center, curRadius, trash, trash );
if ( mCanvas->mapSettings().mapUnits() == QGis::Degrees )
{
// Need to compute radius in meters
QgsDistanceArea da;
da.setSourceCrs( mCanvas->mapSettings().destinationCrs() );
da.setEllipsoid( QgsProject::instance()->readEntry( "Measure", "/Ellipsoid", GEO_NONE ) );
da.setEllipsoidalMode( mCanvas->mapSettings().hasCrsTransformEnabled() );
curRadius = da.measureLine( center, QgsPoint( center.x() + curRadius, center.y() ) );
QGis::UnitType measureUnits = mCanvas->mapSettings().mapUnits();
da.convertMeasurement( curRadius, measureUnits, QGis::Meters, false );
}
double heightConv = QGis::fromUnitToUnitFactor( QgsCoordinateFormat::instance()->getHeightDisplayUnit(), QGis::Meters );
QProgressDialog p( tr( "Calculating viewshed..." ), tr( "Abort" ), 0, 0 );
p.setWindowTitle( tr( "Viewshed" ) );
p.setWindowModality( Qt::ApplicationModal );
bool displayVisible = viewshedDialog.getDisplayMode() == QgsViewshedDialog::DisplayVisibleArea;
int accuracyFactor = viewshedDialog.getAccuracyFactor();
QApplication::setOverrideCursor( Qt::WaitCursor );
bool success = QgsViewshed::computeViewshed( layer->source(), outputFile, "GTiff", center, canvasCrs, viewshedDialog.getObserverHeight() * heightConv, viewshedDialog.getTargetHeight() * heightConv, viewshedDialog.getHeightRelativeToGround(), curRadius, QGis::Meters, filterRegion, displayVisible, accuracyFactor, &p );
QApplication::restoreOverrideCursor();
if ( success )
{
QgsRasterLayer* layer = new QgsRasterLayer( outputFile, tr( "Viewshed [%1]" ).arg( center.toString() ) );
QgsColorRampShader* rampShader = new QgsColorRampShader();
if ( displayVisible )
{
QList<QgsColorRampShader::ColorRampItem> colorRampItems = QList<QgsColorRampShader::ColorRampItem>()
<< QgsColorRampShader::ColorRampItem( 0, QColor( 0, 0, 0, 0 ), "" )
<< QgsColorRampShader::ColorRampItem( 255, QColor( 0, 255, 0 ), tr( "Visible" ) );
rampShader->setColorRampItemList( colorRampItems );
}
else
{
QList<QgsColorRampShader::ColorRampItem> colorRampItems = QList<QgsColorRampShader::ColorRampItem>()
<< QgsColorRampShader::ColorRampItem( 0, QColor( 0, 0, 0, 0 ), "" )
<< QgsColorRampShader::ColorRampItem( 0, QColor( 255, 0, 0 ), tr( "Invisible" ) );
rampShader->setColorRampItemList( colorRampItems );
}
QgsRasterShader* shader = new QgsRasterShader();
shader->setRasterShaderFunction( rampShader );
QgsSingleBandPseudoColorRenderer* renderer = new QgsSingleBandPseudoColorRenderer( 0, 1, shader );
layer->setRenderer( renderer );
QgsMapLayerRegistry::instance()->addMapLayer( layer );
QgsPinAnnotationItem* pin = new QgsPinAnnotationItem( canvas() );
pin->setMapPosition( center, canvasCrs );
pin->setItemFlags( pin->itemFlags() | QgsAnnotationItem::ItemMapPositionLocked );
QgisApp::instance()->itemCouplingManager()->addCoupling( layer, pin );
}
else
{
QMessageBox::critical( 0, tr( "Error" ), tr( "Failed to compute viewshed." ) );
}
reset();
}
void QgsMeasureDialog::changeProjectionEnabledState()
{
// store value
QSettings settings;
if ( mcbProjectionEnabled->isChecked() )
settings.setValue( "/qgis/measure/projectionEnabled", 2 );
else
settings.setValue( "/qgis/measure/projectionEnabled", 0 );
// clear interface
mTable->clear();
QTreeWidgetItem* item = new QTreeWidgetItem( QStringList( QString::number( 0, 'f', 1 ) ) );
item->setTextAlignment( 0, Qt::AlignRight );
mTable->addTopLevelItem( item );
mTotal = 0;
updateUi();
int decimalPlaces = settings.value( "/qgis/measure/decimalplaces", "3" ).toInt();
// create DistanceArea
QgsDistanceArea myDa;
configureDistanceArea( myDa );
if ( mMeasureArea )
{
double area = 0.0;
if ( mTool->points().size() > 1 )
{
area = myDa.measurePolygon( mTool->points() );
}
editTotal->setText( formatArea( area, decimalPlaces ) );
}
else
{
QList<QgsPoint>::const_iterator it;
bool b = true; // first point
QgsPoint p1, p2;
for ( it = mTool->points().constBegin(); it != mTool->points().constEnd(); ++it )
{
p2 = *it;
if ( !b )
{
double d = myDa.measureLine( p1, p2 );
mTotal += d;
editTotal->setText( formatDistance( mTotal, decimalPlaces ) );
QGis::UnitType myDisplayUnits;
convertMeasurement( d, myDisplayUnits, false );
QTreeWidgetItem *item = mTable->topLevelItem( mTable->topLevelItemCount() - 1 );
item->setText( 0, QLocale::system().toString( d, 'f', decimalPlaces ) );
item = new QTreeWidgetItem( QStringList( QLocale::system().toString( 0.0, 'f', decimalPlaces ) ) );
item->setTextAlignment( 0, Qt::AlignRight );
mTable->addTopLevelItem( item );
mTable->scrollToItem( item );
}
p1 = p2;
b = false;
}
}
}
void RgLineVectorLayerDirector::makeGraph( RgGraphBuilder *builder, const QVector< QgsPoint >& additionalPoints,
QVector< QgsPoint >& tiedPoint ) const
{
QgsVectorLayer *vl = myLayer();
if ( vl == NULL )
return;
int featureCount = ( int ) vl->featureCount() * 2;
int step = 0;
QgsCoordinateTransform ct;
QgsDistanceArea da;
ct.setSourceCrs( vl->crs() );
if ( builder->coordinateTransformEnabled() )
{
ct.setDestCRS( builder->destinationCrs() );
da.setProjectionsEnabled( true );
//
//da.setSourceCrs( builder->destinationCrs().srsid() );
//
}
else
{
ct.setDestCRS( vl->crs() );
da.setProjectionsEnabled( false );
}
tiedPoint = QVector< QgsPoint >( additionalPoints.size(), QgsPoint( 0.0, 0.0 ) );
TiePointInfo tmpInfo;
tmpInfo.mLength = infinity();
QVector< TiePointInfo > pointLengthMap( additionalPoints.size(), tmpInfo );
QVector< TiePointInfo >::iterator pointLengthIt;
// begin: tie points to the graph
QgsAttributeList la;
vl->select( la );
QgsFeature feature;
while ( vl->nextFeature( feature ) )
{
QgsMultiPolyline mpl;
if ( feature.geometry()->wkbType() == QGis::WKBLineString )
{
mpl.push_back( feature.geometry()->asPolyline() );
}else if ( feature.geometry()->wkbType() == QGis::WKBMultiLineString )
{
mpl = feature.geometry()->asMultiPolyline();
}
QgsMultiPolyline::iterator mplIt;
for ( mplIt = mpl.begin(); mplIt != mpl.end(); ++mplIt )
{
QgsPoint pt1, pt2;
bool isFirstPoint = true;
QgsPolyline::iterator pointIt;
for ( pointIt = mplIt->begin(); pointIt != mplIt->end(); ++pointIt )
{
pt2 = builder->addVertex( ct.transform( *pointIt ) );
if ( !isFirstPoint )
{
int i = 0;
for ( i = 0; i != additionalPoints.size(); ++i )
{
TiePointInfo info;
if ( pt1 == pt2 )
{
info.mLength = additionalPoints[ i ].sqrDist( pt1 );
info.mTiedPoint = pt1;
}
else
{
info.mLength = additionalPoints[ i ].sqrDistToSegment( pt1.x(), pt1.y(), pt2.x(), pt2.y(), info.mTiedPoint );
}
if ( pointLengthMap[ i ].mLength > info.mLength )
{
info.mTiedPoint = builder->addVertex( info.mTiedPoint );
info.mFirstPoint = pt1;
info.mLastPoint = pt2;
pointLengthMap[ i ] = info;
tiedPoint[ i ] = info.mTiedPoint;
}
}
}
pt1 = pt2;
isFirstPoint = false;
}
}
emit buildProgress( ++step, featureCount );
}
// end: tie points to graph
if ( mDirectionFieldId != -1 )
{
la.push_back( mDirectionFieldId );
}
if ( mSpeedFieldId != -1 )
{
la.push_back( mSpeedFieldId );
}
SpeedUnit su = SpeedUnit::byName( mSpeedUnitName );
// begin graph construction
vl->select( la );
while ( vl->nextFeature( feature ) )
{
QgsAttributeMap attr = feature.attributeMap();
int directionType = mDefaultDirection;
QgsAttributeMap::const_iterator it;
// What direction have feature?
for ( it = attr.constBegin(); it != attr.constEnd(); ++it )
{
if ( it.key() != mDirectionFieldId )
{
continue;
}
QString str = it.value().toString();
if ( str == mBothDirectionValue )
{
directionType = 3;
}
else if ( str == mDirectDirectionValue )
{
directionType = 1;
}
else if ( str == mReverseDirectionValue )
{
directionType = 2;
}
}
// What speed have feature?
double speed = 0.0;
for ( it = attr.constBegin(); it != attr.constEnd(); ++it )
{
if ( it.key() != mSpeedFieldId )
{
continue;
}
speed = it.value().toDouble();
}
if ( speed <= 0.0 )
{
speed = mDefaultSpeed;
}
// begin features segments and add arc to the Graph;
QgsMultiPolyline mpl;
if ( feature.geometry()->wkbType() == QGis::WKBLineString )
{
mpl.push_back( feature.geometry()->asPolyline() );
}else if ( feature.geometry()->wkbType() == QGis::WKBMultiLineString )
{
mpl = feature.geometry()->asMultiPolyline();
}
QgsMultiPolyline::iterator mplIt;
for ( mplIt = mpl.begin(); mplIt != mpl.end(); ++mplIt )
{
QgsPoint pt1, pt2;
bool isFirstPoint = true;
QgsPolyline::iterator pointIt;
for ( pointIt = mplIt->begin(); pointIt != mplIt->end(); ++pointIt )
{
pt2 = builder->addVertex( ct.transform( *pointIt ) );
std::map< double, QgsPoint > pointsOnArc;
pointsOnArc[ 0.0 ] = pt1;
pointsOnArc[ pt1.sqrDist( pt2 )] = pt2;
for ( pointLengthIt = pointLengthMap.begin(); pointLengthIt != pointLengthMap.end(); ++pointLengthIt )
{
if ( pointLengthIt->mFirstPoint == pt1 && pointLengthIt->mLastPoint == pt2 )
{
QgsPoint tiedPoint = pointLengthIt->mTiedPoint;
pointsOnArc[ pt1.sqrDist( tiedPoint )] = tiedPoint;
}
}
if ( !isFirstPoint )
{
std::map< double, QgsPoint >::iterator pointsIt;
QgsPoint pt1;
QgsPoint pt2;
bool isFirstPoint = true;
for ( pointsIt = pointsOnArc.begin(); pointsIt != pointsOnArc.end(); ++pointsIt )
{
pt2 = pointsIt->second;
if ( !isFirstPoint )
{
double cost = da.measureLine( pt1, pt2 );
if ( directionType == 1 ||
directionType == 3 )
{
builder->addArc( pt1, pt2, cost, speed*su.multipler(), feature.id() );
}
if ( directionType == 2 ||
directionType == 3 )
{
builder->addArc( pt2, pt1, cost, speed*su.multipler(), feature.id() );
}
}
pt1 = pt2;
isFirstPoint = false;
}
} // if ( !isFirstPoint )
pt1 = pt2;
isFirstPoint = false;
}
} // for (it = pl.begin(); it != pl.end(); ++it)
emit buildProgress( ++step, featureCount );
} // while( vl->nextFeature(feature) )
} // makeGraph( RgGraphBuilder *builder, const QgsRectangle& rt )