void QgsDistanceArea::setSourceAuthId( const QString& authId )
{
QgsCoordinateReferenceSystem srcCRS;
srcCRS.createFromOgcWmsCrs( authId );
mCoordTransform->setSourceCrs( srcCRS );
}
bool QgsDecorationNorthArrow::calculateNorthDirection()
{
QgsMapCanvas* mapCanvas = QgisApp::instance()->mapCanvas();
bool goodDirn = false;
// Get the shown extent...
QgsRectangle canvasExtent = mapCanvas->extent();
// ... and all layers extent, ...
QgsRectangle fullExtent = mapCanvas->fullExtent();
// ... and combine
QgsRectangle extent = canvasExtent.intersect( & fullExtent );
// If no layers are added or shown, we can't get any direction
if ( mapCanvas->layerCount() > 0 && ! extent.isEmpty() )
{
QgsCoordinateReferenceSystem outputCRS = mapCanvas->mapRenderer()->destinationCrs();
if ( outputCRS.isValid() && !outputCRS.geographicFlag() )
{
// Use a geographic CRS to get lat/long to work out direction
QgsCoordinateReferenceSystem ourCRS;
ourCRS.createFromOgcWmsCrs( GEO_EPSG_CRS_AUTHID );
assert( ourCRS.isValid() );
QgsCoordinateTransform transform( outputCRS, ourCRS );
QgsPoint p1( extent.center() );
// A point a bit above p1. XXX assumes that y increases up!!
// May need to involve the maptopixel transform if this proves
// to be a problem.
QgsPoint p2( p1.x(), p1.y() + extent.height() * 0.25 );
// project p1 and p2 to geographic coords
try
{
p1 = transform.transform( p1 );
p2 = transform.transform( p2 );
}
catch ( QgsCsException &e )
{
Q_UNUSED( e );
// just give up
QgsDebugMsg( "North Arrow: Transformation error, quitting" );
return false;
}
// Work out the value of the initial heading one takes to go
// from point p1 to point p2. The north direction is then that
// many degrees anti-clockwise or vertical.
// Take some care to not divide by zero, etc, and ensure that we
// get sensible results for all possible values for p1 and p2.
goodDirn = true;
double angle = 0.0;
// convert to radians for the equations below
p1.multiply( PI / 180.0 );
p2.multiply( PI / 180.0 );
double y = sin( p2.x() - p1.x() ) * cos( p2.y() );
double x = cos( p1.y() ) * sin( p2.y() ) -
sin( p1.y() ) * cos( p2.y() ) * cos( p2.x() - p1.x() );
// Use TOL to decide if the quotient is big enough.
// Both x and y can be very small, if heavily zoomed
// For small y/x, we set directly angle 0. Not sure
// if this is needed.
if ( y > 0.0 )
{
if ( x > 0.0 && ( y / x ) > TOL )
angle = atan( y / x );
else if ( x < 0.0 && ( y / x ) < -TOL )
angle = PI - atan( -y / x );
else
angle = 0.5 * PI;
}
else if ( y < 0.0 )
{
if ( x > 0.0 && ( y / x ) < -TOL )
angle = -atan( -y / x );
else if ( x < 0.0 && ( y / x ) > TOL )
angle = atan( y / x ) - PI;
else
angle = 1.5 * PI;
}
else
{
if ( x > TOL )
angle = 0.0;
else if ( x < -TOL )
angle = PI;
else
{
angle = 0.0; // p1 = p2
goodDirn = false;
}
}
// And set the angle of the north arrow. Perhaps do something
// different if goodDirn = false.
mRotationInt = qRound( fmod( 360.0 - angle * 180.0 / PI, 360.0 ) );
}
else
{
// For geographic CRS and for when there are no layers, set the
// direction back to the default
mRotationInt = 0;
}
}
return goodDirn;
}
void QgsNewSpatialiteLayerDialog::on_pbnFindSRID_clicked()
{
// first get list of supported SRID from the selected Spatialite database
// to build filter for projection selector
sqlite3 *db = 0;
bool status = true;
if ( !db )
{
int rc = sqlite3_open_v2( mDatabaseComboBox->currentText().toUtf8(), &db, SQLITE_OPEN_READONLY, NULL );
if ( rc != SQLITE_OK )
{
QMessageBox::warning( this, tr( "SpatiaLite Database" ), tr( "Unable to open the database" ) );
return;
}
}
// load up the srid table
const char *pzTail;
sqlite3_stmt *ppStmt;
QString sql = "select auth_srid, auth_name, ref_sys_name from spatial_ref_sys order by srid asc";
QSet<QString> myCRSs;
int rc = sqlite3_prepare( db, sql.toUtf8(), sql.toUtf8().length(), &ppStmt, &pzTail );
// XXX Need to free memory from the error msg if one is set
if ( rc == SQLITE_OK )
{
// get the first row of the result set
while ( sqlite3_step( ppStmt ) == SQLITE_ROW )
{
myCRSs.insert( QString::fromUtf8(( const char * )sqlite3_column_text( ppStmt, 1 ) ) +
":" + QString::fromUtf8(( const char * )sqlite3_column_text( ppStmt, 0 ) ) );
}
}
else
{
// XXX query failed -- warn the user some how
QMessageBox::warning( 0, tr( "Error" ), tr( "Failed to load SRIDS: %1" ).arg( sqlite3_errmsg( db ) ) );
status = false;
}
// close the statement
sqlite3_finalize( ppStmt );
sqlite3_close( db );
if ( !status )
{
return;
}
// prepare projection selector
QgsGenericProjectionSelector *mySelector = new QgsGenericProjectionSelector( this );
mySelector->setMessage();
mySelector->setOgcWmsCrsFilter( myCRSs );
if ( mySelector->exec() )
{
QgsCoordinateReferenceSystem srs;
srs.createFromOgcWmsCrs( mySelector->selectedAuthId() );
bool ok;
mCrsId = srs.authid().split( ':' ).at( 1 ).toInt( &ok );
leSRID->setText( srs.authid() + " - " + srs.description() );
}
delete mySelector;
}
QgsNewVectorLayerDialog::QgsNewVectorLayerDialog( QWidget *parent, Qt::WindowFlags fl )
: QDialog( parent, fl )
{
setupUi( this );
QSettings settings;
restoreGeometry( settings.value( "/Windows/NewVectorLayer/geometry" ).toByteArray() );
mAddAttributeButton->setIcon( QgsApplication::getThemeIcon( "/mActionNewAttribute.png" ) );
mRemoveAttributeButton->setIcon( QgsApplication::getThemeIcon( "/mActionDeleteAttribute.png" ) );
mTypeBox->addItem( tr( "Text data" ), "String" );
mTypeBox->addItem( tr( "Whole number" ), "Integer" );
mTypeBox->addItem( tr( "Decimal number" ), "Real" );
mTypeBox->addItem( tr( "Date" ), "Date" );
mWidth->setValidator( new QIntValidator( 1, 255, this ) );
mPrecision->setValidator( new QIntValidator( 0, 15, this ) );
mPointRadioButton->setChecked( true );
mFileFormatComboBox->addItem( tr( "ESRI Shapefile" ), "ESRI Shapefile" );
#if 0
// Disabled until provider properly supports editing the created file formats
mFileFormatComboBox->addItem( tr( "Comma Separated Value" ), "Comma Separated Value" );
mFileFormatComboBox->addItem( tr( "GML" ), "GML" );
mFileFormatComboBox->addItem( tr( "Mapinfo File" ), "Mapinfo File" );
#endif
if ( mFileFormatComboBox->count() == 1 )
{
mFileFormatComboBox->setVisible( false );
mFileFormatLabel->setVisible( false );
}
mFileFormatComboBox->setCurrentIndex( 0 );
mFileEncoding->addItems( QgsVectorDataProvider::availableEncodings() );
// Use default encoding if none supplied
QString enc = QSettings().value( "/UI/encoding", "System" ).toString();
// The specified decoding is added if not existing alread, and then set current.
// This should select it.
int encindex = mFileEncoding->findText( enc );
if ( encindex < 0 )
{
mFileEncoding->insertItem( 0, enc );
encindex = 0;
}
mFileEncoding->setCurrentIndex( encindex );
mOkButton = buttonBox->button( QDialogButtonBox::Ok );
mAttributeView->addTopLevelItem( new QTreeWidgetItem( QStringList() << "id" << "Integer" << "10" << "" ) );
QgsCoordinateReferenceSystem srs;
srs.createFromOgcWmsCrs( settings.value( "/Projections/layerDefaultCrs", GEO_EPSG_CRS_AUTHID ).toString() );
srs.validate();
mCrsId = srs.srsid();
leSpatialRefSys->setText( srs.authid() + " - " + srs.description() );
connect( mNameEdit, SIGNAL( textChanged( QString ) ), this, SLOT( nameChanged( QString ) ) );
connect( mAttributeView, SIGNAL( itemSelectionChanged() ), this, SLOT( selectionChanged() ) );
mAddAttributeButton->setEnabled( false );
mRemoveAttributeButton->setEnabled( false );
}
QgsNewGeoPackageLayerDialog::QgsNewGeoPackageLayerDialog( QWidget *parent, Qt::WindowFlags fl )
: QDialog( parent, fl )
, mOkButton( nullptr )
, mTableNameEdited( false )
, mLayerIdentifierEdited( false )
{
setupUi( this );
QSettings settings;
restoreGeometry( settings.value( "/Windows/NewGeoPackageLayer/geometry" ).toByteArray() );
mAddAttributeButton->setIcon( QgsApplication::getThemeIcon( "/mActionNewAttribute.png" ) );
mRemoveAttributeButton->setIcon( QgsApplication::getThemeIcon( "/mActionDeleteAttribute.png" ) );
#ifdef SUPPORT_GEOMETRY_LESS
mGeometryTypeBox->addItem( tr( "Non spatial" ), wkbNone );
#endif
mGeometryTypeBox->addItem( tr( "Point" ), wkbPoint );
mGeometryTypeBox->addItem( tr( "Line" ), wkbLineString );
mGeometryTypeBox->addItem( tr( "Polygon" ), wkbPolygon );
mGeometryTypeBox->addItem( tr( "Multi point" ), wkbMultiPoint );
mGeometryTypeBox->addItem( tr( "Multi line" ), wkbMultiLineString );
mGeometryTypeBox->addItem( tr( "Multi polygon" ), wkbMultiPolygon );
#ifdef SUPPORT_CURVE_GEOMETRIES
#if 0
// QGIS always create CompoundCurve and there's no real interest of having just CircularString. CompoundCurve are more useful
mGeometryTypeBox->addItem( tr( "Circular string" ), wkbCircularString );
#endif
mGeometryTypeBox->addItem( tr( "Compound curve" ), wkbCompoundCurve );
mGeometryTypeBox->addItem( tr( "Curve polygon" ), wkbCurvePolygon );
mGeometryTypeBox->addItem( tr( "Multi curve" ), wkbMultiCurve );
mGeometryTypeBox->addItem( tr( "Multi surface" ), wkbMultiSurface );
#endif
#ifdef SUPPORT_GEOMETRY_LESS
mGeometryColumnEdit->setEnabled( false );
mCheckBoxCreateSpatialIndex->setEnabled( false );
mCrsSelector->setEnabled( false );
#endif
mFieldTypeBox->addItem( tr( "Text data" ), "text" );
mFieldTypeBox->addItem( tr( "Whole number (integer)" ), "integer" );
#ifdef SUPPORT_INTEGER64
mFieldTypeBox->addItem( tr( "Whole number (integer 64 bit)" ), "integer64" );
#endif
mFieldTypeBox->addItem( tr( "Decimal number (real)" ), "real" );
mFieldTypeBox->addItem( tr( "Date" ), "date" );
mFieldTypeBox->addItem( tr( "Date&time" ), "datetime" );
mOkButton = buttonBox->button( QDialogButtonBox::Ok );
mOkButton->setEnabled( false );
// Set the SRID box to a default of WGS84
QgsCoordinateReferenceSystem defaultCrs;
defaultCrs.createFromOgcWmsCrs( settings.value( "/Projections/layerDefaultCrs", GEO_EPSG_CRS_AUTHID ).toString() );
defaultCrs.validate();
mCrsSelector->setCrs( defaultCrs );
connect( mFieldNameEdit, SIGNAL( textChanged( const QString& ) ), this, SLOT( fieldNameChanged( QString ) ) );
connect( mAttributeView, SIGNAL( itemSelectionChanged() ), this, SLOT( selectionChanged() ) );
connect( mTableNameEdit, SIGNAL( textChanged( const QString& ) ), this, SLOT( checkOk() ) );
connect( mDatabaseEdit, SIGNAL( textChanged( const QString& ) ), this, SLOT( checkOk() ) );
mAddAttributeButton->setEnabled( false );
mRemoveAttributeButton->setEnabled( false );
#ifndef SUPPORT_SPATIAL_INDEX
mCheckBoxCreateSpatialIndex->hide();
mCheckBoxCreateSpatialIndex->setChecked( false );
#else
mCheckBoxCreateSpatialIndex->setChecked( true );
#endif
#ifndef SUPPORT_IDENTIFIER_DESCRIPTION
mLayerIdentifierLabel->hide();
mLayerIdentifierEdit->hide();
mLayerDescriptionLabel->hide();
mLayerDescriptionEdit->hide();
#endif
#ifndef SUPPORT_FIELD_WIDTH
mFieldLengthLabel->hide();
mFieldLengthEdit->hide();
#endif
}
void QgsDistanceArea::setSourceEpsgCrsId( long epsgId )
{
QgsCoordinateReferenceSystem srcCRS;
srcCRS.createFromOgcWmsCrs( QString( "EPSG:%1" ).arg( epsgId ) );
mCoordTransform->setSourceCrs( srcCRS );
}
