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qgsprojectionselectiontreewidget.cpp
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qgsprojectionselectiontreewidget.cpp
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/***************************************************************************
* qgsprojectionselector.cpp *
* Copyright (C) 2005 by Tim Sutton *
* tim@linfiniti.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. *
***************************************************************************/
#include "qgsprojectionselectiontreewidget.h"
//standard includes
#include <sqlite3.h>
//qgis includes
#include "qgis.h" //magic numbers here
#include "qgsapplication.h"
#include "qgslogger.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsmessagelog.h"
#include "qgssettings.h"
#include "qgsrectangle.h"
//qt includes
#include <QFileInfo>
#include <QHeaderView>
#include <QResizeEvent>
#include <QMessageBox>
QgsProjectionSelectionTreeWidget::QgsProjectionSelectionTreeWidget( QWidget *parent )
: QWidget( parent )
{
setupUi( this );
QFont f = teProjection->font();
f.setPointSize( f.pointSize() - 2 );
teProjection->setFont( f );
leSearch->setShowSearchIcon( true );
connect( lstCoordinateSystems, &QTreeWidget::itemDoubleClicked, this, &QgsProjectionSelectionTreeWidget::lstCoordinateSystems_itemDoubleClicked );
connect( lstRecent, &QTreeWidget::itemDoubleClicked, this, &QgsProjectionSelectionTreeWidget::lstRecent_itemDoubleClicked );
connect( lstCoordinateSystems, &QTreeWidget::currentItemChanged, this, &QgsProjectionSelectionTreeWidget::lstCoordinateSystems_currentItemChanged );
connect( lstRecent, &QTreeWidget::currentItemChanged, this, &QgsProjectionSelectionTreeWidget::lstRecent_currentItemChanged );
connect( cbxHideDeprecated, &QCheckBox::stateChanged, this, &QgsProjectionSelectionTreeWidget::updateFilter );
connect( leSearch, &QgsFilterLineEdit::textChanged, this, &QgsProjectionSelectionTreeWidget::updateFilter );
mAreaCanvas->setVisible( mShowMap );
if ( QDialog *dlg = qobject_cast<QDialog *>( parent ) )
{
// mark selected projection for push to front if parent dialog is accepted
connect( dlg, &QDialog::accepted, this, &QgsProjectionSelectionTreeWidget::pushProjectionToFront );
}
// Get the full path name to the sqlite3 spatial reference database.
mSrsDatabaseFileName = QgsApplication::srsDatabaseFilePath();
lstCoordinateSystems->header()->setSectionResizeMode( AuthidColumn, QHeaderView::Stretch );
lstCoordinateSystems->header()->resizeSection( QgisCrsIdColumn, 0 );
lstCoordinateSystems->header()->setSectionResizeMode( QgisCrsIdColumn, QHeaderView::Fixed );
// Hide (internal) ID column
lstCoordinateSystems->setColumnHidden( QgisCrsIdColumn, true );
lstRecent->header()->setSectionResizeMode( AuthidColumn, QHeaderView::Stretch );
lstRecent->header()->resizeSection( QgisCrsIdColumn, 0 );
lstRecent->header()->setSectionResizeMode( QgisCrsIdColumn, QHeaderView::Fixed );
// Hide (internal) ID column
lstRecent->setColumnHidden( QgisCrsIdColumn, true );
mRecentProjections = QgsCoordinateReferenceSystem::recentProjections();
mCheckBoxNoProjection->setHidden( true );
mCheckBoxNoProjection->setEnabled( false );
connect( mCheckBoxNoProjection, &QCheckBox::toggled, this, [ = ]
{
if ( !mBlockSignals )
emit crsSelected();
} );
connect( mCheckBoxNoProjection, &QCheckBox::toggled, this, [ = ]( bool checked )
{
if ( mCheckBoxNoProjection->isEnabled() )
{
mFrameProjections->setDisabled( checked );
}
} );
}
QgsProjectionSelectionTreeWidget::~QgsProjectionSelectionTreeWidget()
{
if ( !mPushProjectionToFront )
{
return;
}
// Push current projection to front, only if set
long crsId = selectedCrsId();
if ( crsId == 0 )
return;
// Save persistent list of projects
mRecentProjections.removeAll( QString::number( crsId ) );
mRecentProjections.prepend( QString::number( crsId ) );
// Prune size of list
while ( mRecentProjections.size() > 8 )
{
mRecentProjections.removeLast();
}
// Save to file *** Should be removed sometime in the future ***
QgsSettings settings;
settings.setValue( QStringLiteral( "/UI/recentProjections" ), mRecentProjections );
// Convert to EPSG and proj4, and save those values also
QStringList projectionsProj4;
QStringList projectionsAuthId;
for ( int i = 0; i < mRecentProjections.size(); i++ )
{
// Create a crs from the crsId
QgsCoordinateReferenceSystem crs( mRecentProjections.at( i ).toLong(), QgsCoordinateReferenceSystem::InternalCrsId );
if ( ! crs.isValid() )
{
// No? Skip this entry
continue;
}
projectionsProj4 << crs.toProj4();
projectionsAuthId << crs.authid();
}
settings.setValue( QStringLiteral( "/UI/recentProjectionsProj4" ), projectionsProj4 );
settings.setValue( QStringLiteral( "/UI/recentProjectionsAuthId" ), projectionsAuthId );
}
void QgsProjectionSelectionTreeWidget::resizeEvent( QResizeEvent *event )
{
lstCoordinateSystems->header()->resizeSection( NameColumn, event->size().width() - 240 );
lstCoordinateSystems->header()->resizeSection( AuthidColumn, 240 );
lstCoordinateSystems->header()->resizeSection( QgisCrsIdColumn, 0 );
lstRecent->header()->resizeSection( NameColumn, event->size().width() - 240 );
lstRecent->header()->resizeSection( AuthidColumn, 240 );
lstRecent->header()->resizeSection( QgisCrsIdColumn, 0 );
}
void QgsProjectionSelectionTreeWidget::showEvent( QShowEvent *event )
{
if ( mInitialized )
return;
// ensure the projection list view is actually populated
// before we show this widget
loadCrsList( &mCrsFilter );
loadUserCrsList( &mCrsFilter );
if ( !mRecentProjListDone )
{
for ( int i = mRecentProjections.size() - 1; i >= 0; i-- )
insertRecent( mRecentProjections.at( i ).toLong() );
mRecentProjListDone = true;
}
// apply deferred selection
mBlockSignals = true; // we've already emitted the signal, when the deferred crs was first set
applySelection();
mBlockSignals = false;
emit initialized();
// Pass up the inheritance hierarchy
QWidget::showEvent( event );
mInitialized = true;
}
QString QgsProjectionSelectionTreeWidget::ogcWmsCrsFilterAsSqlExpression( QSet<QString> *crsFilter )
{
QString sqlExpression = QStringLiteral( "1" ); // it's "SQL" for "true"
QMap<QString, QStringList> authParts;
if ( !crsFilter )
return sqlExpression;
/*
Ref: WMS 1.3.0, section 6.7.3 "Layer CRS":
Every Layer CRS has an identifier that is a character string. Two types of
Layer CRS identifiers are permitted: "label" and "URL" identifiers:
Label: The identifier includes a namespace prefix, a colon, a numeric or
string code, and in some instances a comma followed by additional
parameters. This International Standard defines three namespaces:
CRS, EpsgCrsId and AUTO2 [...]
URL: The identifier is a fully-qualified Uniform Resource Locator that
references a publicly-accessible file containing a definition of the CRS
that is compliant with ISO 19111.
*/
// iterate through all incoming CRSs
const auto authIds { *crsFilter };
for ( const QString &auth_id : authIds )
{
QStringList parts = auth_id.split( ':' );
if ( parts.size() < 2 )
continue;
authParts[ parts.at( 0 ).toUpper()].append( parts.at( 1 ).toUpper() );
}
if ( authParts.isEmpty() )
return sqlExpression;
if ( !authParts.isEmpty() )
{
QString prefix = QStringLiteral( " AND (" );
for ( auto it = authParts.constBegin(); it != authParts.constEnd(); ++it )
{
sqlExpression += QStringLiteral( "%1(upper(auth_name)='%2' AND upper(auth_id) IN ('%3'))" )
.arg( prefix,
it.key(),
it.value().join( QStringLiteral( "','" ) ) );
prefix = QStringLiteral( " OR " );
}
sqlExpression += ')';
}
QgsDebugMsgLevel( "exiting with '" + sqlExpression + "'.", 4 );
return sqlExpression;
}
void QgsProjectionSelectionTreeWidget::applySelection( int column, QString value )
{
if ( !mProjListDone || !mUserProjListDone )
{
// defer selection until loaded
mSearchColumn = column;
mSearchValue = value;
return;
}
if ( column == QgsProjectionSelectionTreeWidget::None )
{
// invoked deferred selection
column = mSearchColumn;
value = mSearchValue;
mSearchColumn = QgsProjectionSelectionTreeWidget::None;
mSearchValue.clear();
}
if ( column == QgsProjectionSelectionTreeWidget::None )
return;
QList<QTreeWidgetItem *> nodes = lstCoordinateSystems->findItems( value, Qt::MatchExactly | Qt::MatchRecursive, column );
if ( !nodes.isEmpty() )
{
QgsDebugMsgLevel( QStringLiteral( "found %1,%2" ).arg( column ).arg( value ), 4 );
lstCoordinateSystems->setCurrentItem( nodes.first() );
}
else
{
QgsDebugMsgLevel( QStringLiteral( "nothing found for %1,%2" ).arg( column ).arg( value ), 4 );
// deselect the selected item to avoid confusing the user
lstCoordinateSystems->clearSelection();
lstRecent->clearSelection();
teProjection->clear();
}
}
void QgsProjectionSelectionTreeWidget::insertRecent( long crsId )
{
if ( !mProjListDone || !mUserProjListDone )
return;
QList<QTreeWidgetItem *> nodes = lstCoordinateSystems->findItems( QString::number( crsId ), Qt::MatchExactly | Qt::MatchRecursive, QgisCrsIdColumn );
if ( nodes.isEmpty() )
return;
lstRecent->insertTopLevelItem( 0, new QTreeWidgetItem( lstRecent, QStringList()
<< nodes.first()->text( NameColumn )
<< nodes.first()->text( AuthidColumn )
<< nodes.first()->text( QgisCrsIdColumn ) ) );
}
//note this line just returns the projection name!
QString QgsProjectionSelectionTreeWidget::selectedName()
{
// return the selected wkt name from the list view
QTreeWidgetItem *lvi = lstCoordinateSystems->currentItem();
return lvi ? lvi->text( NameColumn ) : QString();
}
void QgsProjectionSelectionTreeWidget::setCrs( const QgsCoordinateReferenceSystem &crs )
{
if ( !crs.isValid() )
{
mCheckBoxNoProjection->setChecked( true );
}
else
{
bool changed = false;
if ( !mInitialized )
{
changed = mDeferredLoadCrs != crs;
mDeferredLoadCrs = crs;
}
mBlockSignals = true;
mCheckBoxNoProjection->setChecked( false );
mBlockSignals = false;
applySelection( AuthidColumn, crs.authid() );
if ( changed )
{
emit crsSelected();
}
}
}
void QgsProjectionSelectionTreeWidget::setPreviewRect( const QgsRectangle &rect )
{
mAreaCanvas->setCanvasRect( rect );
}
QgsRectangle QgsProjectionSelectionTreeWidget::previewRect() const
{
return mAreaCanvas->canvasRect();
}
// Returns the whole proj4 string for the selected projection node
QString QgsProjectionSelectionTreeWidget::selectedProj4String()
{
// Only return the projection if there is a node in the tree
// selected that has an srid. This prevents error if the user
// selects a top-level node rather than an actual coordinate
// system
//
// Get the selected node
QTreeWidgetItem *item = lstCoordinateSystems->currentItem();
if ( !item || item->text( QgisCrsIdColumn ).isEmpty() )
return QString();
long srsId = item->text( QgisCrsIdColumn ).toLong();
QgsCoordinateReferenceSystem crs = QgsCoordinateReferenceSystem::fromSrsId( srsId );
return crs.toProj4();
}
QString QgsProjectionSelectionTreeWidget::selectedWktString()
{
QTreeWidgetItem *item = lstCoordinateSystems->currentItem();
if ( !item || item->text( QgisCrsIdColumn ).isEmpty() )
return QString();
long srsId = item->text( QgisCrsIdColumn ).toLong();
QgsCoordinateReferenceSystem crs = QgsCoordinateReferenceSystem::fromSrsId( srsId );
return crs.toWkt( QgsCoordinateReferenceSystem::WKT2_2015, true );
}
QString QgsProjectionSelectionTreeWidget::getSelectedExpression( const QString &expression ) const
{
// Only return the attribute if there is a node in the tree
// selected that has an srs_id. This prevents error if the user
// selects a top-level node rather than an actual coordinate
// system
//
// Get the selected node and make sure it is a srs andx
// not a top-level projection node
QTreeWidgetItem *lvi = lstCoordinateSystems->currentItem();
if ( !lvi || lvi->text( QgisCrsIdColumn ).isEmpty() )
return QString();
//
// Determine if this is a user projection or a system on
// user projection defs all have srs_id >= 100000
//
QString databaseFileName;
if ( lvi->text( QgisCrsIdColumn ).toLong() >= USER_CRS_START_ID )
{
databaseFileName = QgsApplication::qgisUserDatabaseFilePath();
if ( !QFileInfo::exists( databaseFileName ) )
{
return QString();
}
}
else
{
databaseFileName = mSrsDatabaseFileName;
}
//
// set up the database
// XXX We could probably hold the database open for the life of this object,
// assuming that it will never be used anywhere else. Given the low overhead,
// opening it each time seems to be a reasonable approach at this time.
sqlite3 *database = nullptr;
int rc = sqlite3_open_v2( databaseFileName.toUtf8().constData(), &database, SQLITE_OPEN_READONLY, nullptr );
if ( rc )
{
QgsMessageLog::logMessage( tr( "Resource Location Error" ), tr( "Error reading database file from: \n %1\n"
"Because of this the projection selector will not work…" ).arg( databaseFileName ),
Qgis::Critical );
return QString();
}
// prepare the sql statement
const char *tail = nullptr;
sqlite3_stmt *stmt = nullptr;
QString sql = QStringLiteral( "select %1 from tbl_srs where srs_id=%2" )
.arg( expression,
lvi->text( QgisCrsIdColumn ) );
QgsDebugMsgLevel( QStringLiteral( "Finding selected attribute using : %1" ).arg( sql ), 4 );
rc = sqlite3_prepare( database, sql.toUtf8(), sql.toUtf8().length(), &stmt, &tail );
// XXX Need to free memory from the error msg if one is set
QString attributeValue;
if ( rc == SQLITE_OK && sqlite3_step( stmt ) == SQLITE_ROW )
{
// get the first row of the result set
attributeValue = QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 0 ) );
}
// close the statement
sqlite3_finalize( stmt );
// close the database
sqlite3_close( database );
// return the srs
return attributeValue;
}
QgsCoordinateReferenceSystem QgsProjectionSelectionTreeWidget::crs() const
{
if ( mCheckBoxNoProjection->isEnabled() && mCheckBoxNoProjection->isChecked() )
return QgsCoordinateReferenceSystem();
if ( !mInitialized && mDeferredLoadCrs.isValid() )
return mDeferredLoadCrs;
int srid = getSelectedExpression( QStringLiteral( "srs_id" ) ).toLong();
if ( srid >= USER_CRS_START_ID )
return QgsCoordinateReferenceSystem::fromOgcWmsCrs( QStringLiteral( "USER:%1" ).arg( srid ) );
else
return QgsCoordinateReferenceSystem::fromOgcWmsCrs( getSelectedExpression( QStringLiteral( "upper(auth_name||':'||auth_id)" ) ) );
}
void QgsProjectionSelectionTreeWidget::setShowNoProjection( bool show )
{
mCheckBoxNoProjection->setVisible( show );
mCheckBoxNoProjection->setEnabled( show );
if ( show )
{
mFrameProjections->setDisabled( mCheckBoxNoProjection->isChecked() );
}
}
void QgsProjectionSelectionTreeWidget::setShowBoundsMap( bool show )
{
mShowMap = show;
mAreaCanvas->setVisible( show );
}
bool QgsProjectionSelectionTreeWidget::showNoProjection() const
{
return !mCheckBoxNoProjection->isHidden();
}
bool QgsProjectionSelectionTreeWidget::showBoundsMap() const
{
return mShowMap;
}
bool QgsProjectionSelectionTreeWidget::hasValidSelection() const
{
QTreeWidgetItem *item = lstCoordinateSystems->currentItem();
if ( mCheckBoxNoProjection->isChecked() )
return true;
else if ( !mInitialized && mDeferredLoadCrs.isValid() )
return true;
else
return item && !item->text( QgisCrsIdColumn ).isEmpty();
}
long QgsProjectionSelectionTreeWidget::selectedCrsId()
{
QTreeWidgetItem *item = lstCoordinateSystems->currentItem();
if ( item && !item->text( QgisCrsIdColumn ).isEmpty() )
return lstCoordinateSystems->currentItem()->text( QgisCrsIdColumn ).toLong();
else
return 0;
}
void QgsProjectionSelectionTreeWidget::setOgcWmsCrsFilter( const QSet<QString> &crsFilter )
{
mCrsFilter = crsFilter;
mProjListDone = false;
mUserProjListDone = false;
lstCoordinateSystems->clear();
}
void QgsProjectionSelectionTreeWidget::loadUserCrsList( QSet<QString> *crsFilter )
{
if ( mUserProjListDone )
return;
QgsDebugMsgLevel( QStringLiteral( "Fetching user projection list..." ), 4 );
// convert our Coordinate Reference System filter into the SQL expression
QString sqlFilter = ogcWmsCrsFilterAsSqlExpression( crsFilter );
// User defined coordinate system node
// Make in an italic font to distinguish them from real projections
mUserProjList = new QTreeWidgetItem( lstCoordinateSystems, QStringList( tr( "User Defined Coordinate Systems" ) ) );
QFont fontTemp = mUserProjList->font( 0 );
fontTemp.setItalic( true );
fontTemp.setBold( true );
mUserProjList->setFont( 0, fontTemp );
mUserProjList->setIcon( 0, QgsApplication::getThemeIcon( QStringLiteral( "/user.svg" ) ) );
//determine where the user proj database lives for this user. If none is found an empty
//now only will be shown
QString databaseFileName = QgsApplication::qgisUserDatabaseFilePath();
// first we look for ~/.qgis/qgis.db
// if it doesn't exist we copy it in from the global resources dir
//return straight away if the user has not created any custom projections
if ( !QFileInfo::exists( databaseFileName ) )
{
QgsDebugMsg( QStringLiteral( "Users qgis.db not found...skipping" ) );
mUserProjListDone = true;
return;
}
sqlite3 *database = nullptr;
const char *tail = nullptr;
sqlite3_stmt *stmt = nullptr;
//check the db is available
int result = sqlite3_open_v2( databaseFileName.toUtf8().constData(), &database, SQLITE_OPEN_READONLY, nullptr );
if ( result )
{
// XXX This will likely never happen since on open, sqlite creates the
// database if it does not exist. But we checked earlier for its existence
// and aborted in that case. This is because we may be running from read only
// media such as live cd and don't want to force trying to create a db.
showDBMissingWarning( databaseFileName );
return;
}
// Set up the query to retrieve the projection information needed to populate the list
QString sql = QStringLiteral( "select description, srs_id from vw_srs where %1" ).arg( sqlFilter );
result = sqlite3_prepare( database, sql.toUtf8(), sql.toUtf8().length(), &stmt, &tail );
// XXX Need to free memory from the error msg if one is set
if ( result == SQLITE_OK )
{
QTreeWidgetItem *newItem = nullptr;
while ( sqlite3_step( stmt ) == SQLITE_ROW )
{
newItem = new QTreeWidgetItem( mUserProjList, QStringList( QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 0 ) ) ) );
// EpsgCrsId for user projections is not always defined in some dbases.
// It's also not written from customprojections dialog.
// display the epsg (field 2) in the second column of the list view
// newItem->setText( EPSG_COLUMN, QString::fromUtf8(( char * )sqlite3_column_text( stmt, 2 ) ) );
// display the qgis srs_id (field 1) in the third column of the list view
newItem->setText( QgisCrsIdColumn, QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 1 ) ) );
newItem->setText( AuthidColumn, QStringLiteral( "USER:%1" ).arg( QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 1 ) ).toInt() ) );
}
}
// close the sqlite3 statement
sqlite3_finalize( stmt );
sqlite3_close( database );
mUserProjListDone = true;
}
void QgsProjectionSelectionTreeWidget::loadCrsList( QSet<QString> *crsFilter )
{
if ( mProjListDone )
return;
// convert our Coordinate Reference System filter into the SQL expression
QString sqlFilter = ogcWmsCrsFilterAsSqlExpression( crsFilter );
// Create the top-level nodes for the list view of projections
// Make in an italic font to distinguish them from real projections
//
// Geographic coordinate system node
mGeoList = new QTreeWidgetItem( lstCoordinateSystems, QStringList( tr( "Geographic Coordinate Systems" ) ) );
QFont fontTemp = mGeoList->font( 0 );
fontTemp.setItalic( true );
fontTemp.setBold( true );
mGeoList->setFont( 0, fontTemp );
mGeoList->setIcon( 0, QgsApplication::getThemeIcon( QStringLiteral( "/mIconProjectionEnabled.svg" ) ) );
// Projected coordinate system node
mProjList = new QTreeWidgetItem( lstCoordinateSystems, QStringList( tr( "Projected Coordinate Systems" ) ) );
fontTemp = mProjList->font( 0 );
fontTemp.setItalic( true );
fontTemp.setBold( true );
mProjList->setFont( 0, fontTemp );
mProjList->setIcon( 0, QgsApplication::getThemeIcon( QStringLiteral( "/transformed.svg" ) ) );
//bail out in case the projections db does not exist
//this is necessary in case the pc is running linux with a
//read only filesystem because otherwise sqlite will try
//to create the db file on the fly
if ( !QFileInfo::exists( mSrsDatabaseFileName ) )
{
mProjListDone = true;
return;
}
// open the database containing the spatial reference data
sqlite3 *database = nullptr;
int rc = sqlite3_open_v2( mSrsDatabaseFileName.toUtf8().constData(), &database, SQLITE_OPEN_READONLY, nullptr );
if ( rc )
{
// XXX This will likely never happen since on open, sqlite creates the
// database if it does not exist.
showDBMissingWarning( mSrsDatabaseFileName );
return;
}
const char *tail = nullptr;
sqlite3_stmt *stmt = nullptr;
// Set up the query to retrieve the projection information needed to populate the list
//note I am giving the full field names for clarity here and in case someone
//changes the underlying view TS
QString sql = QStringLiteral( "select description, srs_id, upper(auth_name||':'||auth_id), is_geo, name, parameters, deprecated from vw_srs where %1 order by name,description" )
.arg( sqlFilter );
rc = sqlite3_prepare( database, sql.toUtf8(), sql.toUtf8().length(), &stmt, &tail );
// XXX Need to free memory from the error msg if one is set
if ( rc == SQLITE_OK )
{
QTreeWidgetItem *newItem = nullptr;
// Cache some stuff to speed up creating of the list of projected
// spatial reference systems
QString previousSrsType;
QTreeWidgetItem *previousSrsTypeNode = nullptr;
while ( sqlite3_step( stmt ) == SQLITE_ROW )
{
// check to see if the srs is geographic
int isGeo = sqlite3_column_int( stmt, 3 );
if ( isGeo )
{
// this is a geographic coordinate system
// Add it to the tree (field 0)
newItem = new QTreeWidgetItem( mGeoList, QStringList( QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 0 ) ) ) );
// display the authority name (field 2) in the second column of the list view
newItem->setText( AuthidColumn, QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 2 ) ) );
// display the qgis srs_id (field 1) in the third column of the list view
newItem->setText( QgisCrsIdColumn, QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 1 ) ) );
}
else
{
// This is a projected srs
QTreeWidgetItem *node = nullptr;
QString srsType = QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 4 ) );
if ( srsType.isEmpty() )
srsType = tr( "Other" );
// Find the node for this type and add the projection to it
// If the node doesn't exist, create it
if ( srsType == previousSrsType )
{
node = previousSrsTypeNode;
}
else
{
// Different from last one, need to search
QList<QTreeWidgetItem *> nodes = lstCoordinateSystems->findItems( srsType, Qt::MatchExactly | Qt::MatchRecursive, NameColumn );
if ( nodes.isEmpty() )
{
// the node doesn't exist -- create it
// Make in an italic font to distinguish them from real projections
node = new QTreeWidgetItem( mProjList, QStringList( srsType ) );
QFont fontTemp = node->font( 0 );
fontTemp.setItalic( true );
node->setFont( 0, fontTemp );
}
else
{
node = nodes.first();
}
// Update the cache.
previousSrsType = srsType;
previousSrsTypeNode = node;
}
// add the item, setting the projection name in the first column of the list view
newItem = new QTreeWidgetItem( node, QStringList( QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 0 ) ) ) );
// display the authority id (field 2) in the second column of the list view
newItem->setText( AuthidColumn, QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 2 ) ) );
// display the qgis srs_id (field 1) in the third column of the list view
newItem->setText( QgisCrsIdColumn, QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 1 ) ) );
// expand also parent node
newItem->parent()->setExpanded( true );
}
// display the qgis deprecated in the user data of the item
newItem->setData( 0, RoleDeprecated, QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 6 ) ) );
newItem->setHidden( cbxHideDeprecated->isChecked() );
}
mProjList->setExpanded( true );
}
// close the sqlite3 statement
sqlite3_finalize( stmt );
// close the database
sqlite3_close( database );
mProjListDone = true;
}
// New coordinate system selected from the list
void QgsProjectionSelectionTreeWidget::lstCoordinateSystems_currentItemChanged( QTreeWidgetItem *current, QTreeWidgetItem * )
{
QgsDebugMsgLevel( QStringLiteral( "Entered." ), 4 );
if ( !current )
{
QgsDebugMsgLevel( QStringLiteral( "no current item" ), 4 );
return;
}
lstCoordinateSystems->scrollToItem( current );
// If the item has children, it's not an end node in the tree, and
// hence is just a grouping thingy, not an actual CRS.
if ( current->childCount() == 0 )
{
// Found a real CRS
if ( !mBlockSignals )
emit crsSelected();
updateBoundsPreview();
QList<QTreeWidgetItem *> nodes = lstRecent->findItems( current->text( QgisCrsIdColumn ), Qt::MatchExactly, QgisCrsIdColumn );
if ( !nodes.isEmpty() )
{
QgsDebugMsgLevel( QStringLiteral( "found srs %1 in recent" ).arg( current->text( QgisCrsIdColumn ) ), 4 );
lstRecent->setCurrentItem( nodes.first() );
}
else
{
QgsDebugMsgLevel( QStringLiteral( "srs %1 not recent" ).arg( current->text( QgisCrsIdColumn ) ), 4 );
lstRecent->clearSelection();
lstCoordinateSystems->setFocus( Qt::OtherFocusReason );
}
}
else
{
// Not a CRS - remove the highlight so the user doesn't get too confused
current->setSelected( false );
teProjection->clear();
lstRecent->clearSelection();
}
}
void QgsProjectionSelectionTreeWidget::lstCoordinateSystems_itemDoubleClicked( QTreeWidgetItem *current, int column )
{
Q_UNUSED( column )
QgsDebugMsgLevel( QStringLiteral( "Entered." ), 4 );
if ( !current )
{
QgsDebugMsgLevel( QStringLiteral( "no current item" ), 4 );
return;
}
// If the item has children, it's not an end node in the tree, and
// hence is just a grouping thingy, not an actual CRS.
if ( current->childCount() == 0 )
emit projectionDoubleClicked();
}
void QgsProjectionSelectionTreeWidget::lstRecent_currentItemChanged( QTreeWidgetItem *current, QTreeWidgetItem * )
{
QgsDebugMsgLevel( QStringLiteral( "Entered." ), 4 );
if ( !current )
{
QgsDebugMsgLevel( QStringLiteral( "no current item" ), 4 );
return;
}
lstRecent->scrollToItem( current );
QList<QTreeWidgetItem *> nodes = lstCoordinateSystems->findItems( current->text( QgisCrsIdColumn ), Qt::MatchExactly | Qt::MatchRecursive, QgisCrsIdColumn );
if ( !nodes.isEmpty() )
lstCoordinateSystems->setCurrentItem( nodes.first() );
}
void QgsProjectionSelectionTreeWidget::lstRecent_itemDoubleClicked( QTreeWidgetItem *current, int column )
{
Q_UNUSED( column )
QgsDebugMsgLevel( QStringLiteral( "Entered." ), 4 );
if ( !current )
{
QgsDebugMsgLevel( QStringLiteral( "no current item" ), 4 );
return;
}
QList<QTreeWidgetItem *> nodes = lstCoordinateSystems->findItems( current->text( QgisCrsIdColumn ), Qt::MatchExactly | Qt::MatchRecursive, QgisCrsIdColumn );
if ( !nodes.isEmpty() )
emit projectionDoubleClicked();
}
void QgsProjectionSelectionTreeWidget::updateFilter()
{
QString filterTxtCopy = leSearch->text();
filterTxtCopy.replace( QRegExp( "\\s+" ), QStringLiteral( ".*" ) );
QRegExp re( filterTxtCopy, Qt::CaseInsensitive );
const bool hideDeprecated = cbxHideDeprecated->isChecked();
auto filterTreeWidget = [ = ]( QTreeWidget * tree )
{
QTreeWidgetItemIterator itr( tree );
while ( *itr )
{
if ( ( *itr )->childCount() == 0 ) // it's an end node aka a projection
{
if ( hideDeprecated && ( *itr )->data( 0, RoleDeprecated ).toBool() )
{
( *itr )->setHidden( true );
if ( ( *itr )->isSelected() )
{
( *itr )->setSelected( false );
teProjection->clear();
}
}
else if ( ( *itr )->text( NameColumn ).contains( re )
|| ( *itr )->text( AuthidColumn ).contains( re )
)
{
( *itr )->setHidden( false );
QTreeWidgetItem *parent = ( *itr )->parent();
while ( parent )
{
parent->setExpanded( true );
parent->setHidden( false );
parent = parent->parent();
}
}
else
{
( *itr )->setHidden( true );
}
}
else
{
( *itr )->setHidden( true );
}
++itr;
}
};
// filter recent crs's
filterTreeWidget( lstRecent );
// filter crs's
filterTreeWidget( lstCoordinateSystems );
}
void QgsProjectionSelectionTreeWidget::pushProjectionToFront()
{
// set flag to push selected projection to front in destructor
mPushProjectionToFront = true;
}
long QgsProjectionSelectionTreeWidget::getLargestCrsIdMatch( const QString &sql )
{
long srsId = 0;
//
// Now perform the actual search
//
sqlite3 *database = nullptr;
const char *tail = nullptr;
sqlite3_stmt *stmt = nullptr;
int result;
// first we search the users db as any srsid there will be definition be greater than in sys db
//check the db is available
QString databaseFileName = QgsApplication::qgisUserDatabaseFilePath();
if ( QFileInfo::exists( databaseFileName ) ) //only bother trying to open if the file exists
{
result = sqlite3_open_v2( databaseFileName.toUtf8().constData(), &database, SQLITE_OPEN_READONLY, nullptr );
if ( result )
{
// XXX This will likely never happen since on open, sqlite creates the
// database if it does not exist. But we checked earlier for its existence
// and aborted in that case. This is because we may be running from read only
// media such as live cd and don't want to force trying to create a db.
showDBMissingWarning( databaseFileName );
return 0;
}
result = sqlite3_prepare( database, sql.toUtf8(), sql.toUtf8().length(), &stmt, &tail );
// XXX Need to free memory from the error msg if one is set
if ( result == SQLITE_OK && sqlite3_step( stmt ) == SQLITE_ROW )
{
QString srsIdString = QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 0 ) );
srsId = srsIdString.toLong();
// close the sqlite3 statement
sqlite3_finalize( stmt );
sqlite3_close( database );
return srsId;
}
}
else
{
//only bother looking in srs.db if it wasn't found above
result = sqlite3_open_v2( mSrsDatabaseFileName.toUtf8().constData(), &database, SQLITE_OPEN_READONLY, nullptr );
if ( result )
{
QgsDebugMsg( QStringLiteral( "Can't open * user * database: %1" ).arg( sqlite3_errmsg( database ) ) );
//no need for assert because user db may not have been created yet
return 0;
}
}
result = sqlite3_prepare( database, sql.toUtf8(), sql.toUtf8().length(), &stmt, &tail );
// XXX Need to free memory from the error msg if one is set
if ( result == SQLITE_OK && sqlite3_step( stmt ) == SQLITE_ROW )
{
QString srsIdString = QString::fromUtf8( ( char * )sqlite3_column_text( stmt, 0 ) );
srsId = srsIdString.toLong();
}
// close the sqlite3 statement
sqlite3_finalize( stmt );
sqlite3_close( database );
return srsId;
}
void QgsProjectionSelectionTreeWidget::updateBoundsPreview()
{
QTreeWidgetItem *lvi = lstCoordinateSystems->currentItem();
if ( !lvi || lvi->text( QgisCrsIdColumn ).isEmpty() )
return;
QgsCoordinateReferenceSystem currentCrs = crs();
if ( !currentCrs.isValid() )
return;
QgsRectangle rect = currentCrs.bounds();
QString extentString = tr( "Extent not known" );
mAreaCanvas->setPreviewRect( rect );
if ( !qgsDoubleNear( rect.area(), 0.0 ) )
{
extentString = QStringLiteral( "%1, %2, %3, %4" )
.arg( rect.xMinimum(), 0, 'f', 2 )
.arg( rect.yMinimum(), 0, 'f', 2 )
.arg( rect.xMaximum(), 0, 'f', 2 )
.arg( rect.yMaximum(), 0, 'f', 2 );
}
const QString extentHtml = QStringLiteral( "<dt><b>%1</b></dt><dd>%2</dd>" ).arg( tr( "Extent" ), extentString );
const QString wktString = tr( "<dt><b>%1</b></dt><dd><code>%2</code></dd>" ).arg( tr( "WKT" ), selectedWktString().replace( '\n', QStringLiteral( "<br>" ) ).replace( ' ', QStringLiteral( " " ) ) );
const QString proj4String = tr( "<dt><b>%1</b></dt><dd><code>%2</code></dd>" ).arg( tr( "Proj4" ), selectedProj4String() );
#ifdef Q_OS_WIN
const int smallerPointSize = std::max( font().pointSize() - 1, 8 ); // bit less on windows, due to poor rendering of small point sizes
#else
const int smallerPointSize = std::max( font().pointSize() - 2, 6 );
#endif
teProjection->setText( QStringLiteral( "<div style=\"font-size: %1pt\"><h3>%2</h3><dl>" ).arg( smallerPointSize ).arg( selectedName() ) + wktString + proj4String + extentHtml + QStringLiteral( "</dl></div>" ) );
}
QStringList QgsProjectionSelectionTreeWidget::authorities()
{
sqlite3 *database = nullptr;
const char *tail = nullptr;
sqlite3_stmt *stmt = nullptr;
int result = sqlite3_open_v2( mSrsDatabaseFileName.toUtf8().constData(), &database, SQLITE_OPEN_READONLY, nullptr );
if ( result )
{