mirror of
https://github.com/qgis/QGIS.git
synced 2025-04-04 00:06:15 -04:00
425 lines
13 KiB
C++
425 lines
13 KiB
C++
/***************************************************************************
|
|
qgsquerybuilder.cpp - Query Builder
|
|
--------------------------------------
|
|
Date : 2004-11-19
|
|
Copyright : (C) 2004 by Gary E.Sherman
|
|
Email : sherman at mrcc.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 "qgsquerybuilder.h"
|
|
#include "qgslogger.h"
|
|
#include "qgssettings.h"
|
|
#include "qgsvectorlayer.h"
|
|
#include "qgsvectordataprovider.h"
|
|
|
|
#include <QListView>
|
|
#include <QMessageBox>
|
|
#include <QRegExp>
|
|
#include <QPushButton>
|
|
|
|
// constructor used when the query builder must make its own
|
|
// connection to the database
|
|
QgsQueryBuilder::QgsQueryBuilder( QgsVectorLayer *layer,
|
|
QWidget *parent, Qt::WindowFlags fl )
|
|
: QDialog( parent, fl )
|
|
, mPreviousFieldRow( -1 )
|
|
, mLayer( layer )
|
|
{
|
|
setupUi( this );
|
|
connect( btnEqual, &QPushButton::clicked, this, &QgsQueryBuilder::btnEqual_clicked );
|
|
connect( btnLessThan, &QPushButton::clicked, this, &QgsQueryBuilder::btnLessThan_clicked );
|
|
connect( btnGreaterThan, &QPushButton::clicked, this, &QgsQueryBuilder::btnGreaterThan_clicked );
|
|
connect( btnPct, &QPushButton::clicked, this, &QgsQueryBuilder::btnPct_clicked );
|
|
connect( btnIn, &QPushButton::clicked, this, &QgsQueryBuilder::btnIn_clicked );
|
|
connect( btnNotIn, &QPushButton::clicked, this, &QgsQueryBuilder::btnNotIn_clicked );
|
|
connect( btnLike, &QPushButton::clicked, this, &QgsQueryBuilder::btnLike_clicked );
|
|
connect( btnILike, &QPushButton::clicked, this, &QgsQueryBuilder::btnILike_clicked );
|
|
connect( lstFields, &QListView::clicked, this, &QgsQueryBuilder::lstFields_clicked );
|
|
connect( lstFields, &QListView::doubleClicked, this, &QgsQueryBuilder::lstFields_doubleClicked );
|
|
connect( lstValues, &QListView::doubleClicked, this, &QgsQueryBuilder::lstValues_doubleClicked );
|
|
connect( btnLessEqual, &QPushButton::clicked, this, &QgsQueryBuilder::btnLessEqual_clicked );
|
|
connect( btnGreaterEqual, &QPushButton::clicked, this, &QgsQueryBuilder::btnGreaterEqual_clicked );
|
|
connect( btnNotEqual, &QPushButton::clicked, this, &QgsQueryBuilder::btnNotEqual_clicked );
|
|
connect( btnAnd, &QPushButton::clicked, this, &QgsQueryBuilder::btnAnd_clicked );
|
|
connect( btnNot, &QPushButton::clicked, this, &QgsQueryBuilder::btnNot_clicked );
|
|
connect( btnOr, &QPushButton::clicked, this, &QgsQueryBuilder::btnOr_clicked );
|
|
connect( btnGetAllValues, &QPushButton::clicked, this, &QgsQueryBuilder::btnGetAllValues_clicked );
|
|
connect( btnSampleValues, &QPushButton::clicked, this, &QgsQueryBuilder::btnSampleValues_clicked );
|
|
connect( buttonBox, &QDialogButtonBox::helpRequested, this, &QgsQueryBuilder::showHelp );
|
|
|
|
QgsSettings settings;
|
|
restoreGeometry( settings.value( QStringLiteral( "Windows/QueryBuilder/geometry" ) ).toByteArray() );
|
|
|
|
QPushButton *pbn = new QPushButton( tr( "&Test" ) );
|
|
buttonBox->addButton( pbn, QDialogButtonBox::ActionRole );
|
|
connect( pbn, &QAbstractButton::clicked, this, &QgsQueryBuilder::test );
|
|
|
|
pbn = new QPushButton( tr( "&Clear" ) );
|
|
buttonBox->addButton( pbn, QDialogButtonBox::ActionRole );
|
|
connect( pbn, &QAbstractButton::clicked, this, &QgsQueryBuilder::clear );
|
|
|
|
setupGuiViews();
|
|
|
|
mOrigSubsetString = layer->subsetString();
|
|
|
|
mUseUnfilteredLayer->setDisabled( mLayer->subsetString().isEmpty() );
|
|
|
|
lblDataUri->setText( tr( "Set provider filter on %1" ).arg( layer->name() ) );
|
|
txtSQL->setText( mOrigSubsetString );
|
|
|
|
populateFields();
|
|
}
|
|
|
|
QgsQueryBuilder::~QgsQueryBuilder()
|
|
{
|
|
QgsSettings settings;
|
|
settings.setValue( QStringLiteral( "Windows/QueryBuilder/geometry" ), saveGeometry() );
|
|
}
|
|
|
|
void QgsQueryBuilder::showEvent( QShowEvent *event )
|
|
{
|
|
txtSQL->setFocus();
|
|
QDialog::showEvent( event );
|
|
}
|
|
|
|
void QgsQueryBuilder::populateFields()
|
|
{
|
|
const QgsFields &fields = mLayer->fields();
|
|
for ( int idx = 0; idx < fields.count(); ++idx )
|
|
{
|
|
if ( fields.fieldOrigin( idx ) != QgsFields::OriginProvider )
|
|
{
|
|
// only consider native fields
|
|
continue;
|
|
}
|
|
QStandardItem *myItem = new QStandardItem( fields.at( idx ).name() );
|
|
myItem->setData( idx );
|
|
myItem->setEditable( false );
|
|
mModelFields->insertRow( mModelFields->rowCount(), myItem );
|
|
}
|
|
|
|
// All fields get ... setup
|
|
setupLstFieldsModel();
|
|
}
|
|
|
|
void QgsQueryBuilder::setupLstFieldsModel()
|
|
{
|
|
lstFields->setModel( mModelFields );
|
|
}
|
|
|
|
void QgsQueryBuilder::setupGuiViews()
|
|
{
|
|
//Initialize the models
|
|
mModelFields = new QStandardItemModel();
|
|
mModelValues = new QStandardItemModel();
|
|
// Modes
|
|
lstFields->setViewMode( QListView::ListMode );
|
|
lstValues->setViewMode( QListView::ListMode );
|
|
lstFields->setSelectionBehavior( QAbstractItemView::SelectRows );
|
|
lstValues->setSelectionBehavior( QAbstractItemView::SelectRows );
|
|
// Performance tip since Qt 4.1
|
|
lstFields->setUniformItemSizes( true );
|
|
lstValues->setUniformItemSizes( true );
|
|
// Colored rows
|
|
lstFields->setAlternatingRowColors( true );
|
|
lstValues->setAlternatingRowColors( true );
|
|
}
|
|
|
|
void QgsQueryBuilder::fillValues( int idx, int limit )
|
|
{
|
|
// clear the model
|
|
mModelValues->clear();
|
|
|
|
// determine the field type
|
|
QList<QVariant> values = mLayer->uniqueValues( idx, limit ).toList();
|
|
std::sort( values.begin(), values.end() );
|
|
|
|
QString nullValue = QgsApplication::nullRepresentation();
|
|
|
|
QgsDebugMsg( QString( "nullValue: %1" ).arg( nullValue ) );
|
|
|
|
Q_FOREACH ( const QVariant &var, values )
|
|
{
|
|
QString value;
|
|
if ( var.isNull() )
|
|
value = nullValue;
|
|
else if ( var.type() == QVariant::Date && mLayer->providerType() == QLatin1String( "ogr" ) && mLayer->storageType() == QLatin1String( "ESRI Shapefile" ) )
|
|
value = var.toDate().toString( QStringLiteral( "yyyy/MM/dd" ) );
|
|
else
|
|
value = var.toString();
|
|
|
|
QStandardItem *myItem = new QStandardItem( value );
|
|
myItem->setEditable( false );
|
|
myItem->setData( var, Qt::UserRole + 1 );
|
|
mModelValues->insertRow( mModelValues->rowCount(), myItem );
|
|
QgsDebugMsg( QString( "Value is null: %1\nvalue: %2" ).arg( var.isNull() ).arg( var.isNull() ? nullValue : var.toString() ) );
|
|
}
|
|
}
|
|
|
|
void QgsQueryBuilder::btnSampleValues_clicked()
|
|
{
|
|
lstValues->setCursor( Qt::WaitCursor );
|
|
|
|
QString prevSubsetString = mLayer->subsetString();
|
|
if ( mUseUnfilteredLayer->isChecked() && !prevSubsetString.isEmpty() )
|
|
{
|
|
mLayer->setSubsetString( QLatin1String( "" ) );
|
|
}
|
|
|
|
//delete connection mModelValues and lstValues
|
|
QStandardItemModel *tmp = new QStandardItemModel();
|
|
lstValues->setModel( tmp );
|
|
//Clear and fill the mModelValues
|
|
fillValues( mModelFields->data( lstFields->currentIndex(), Qt::UserRole + 1 ).toInt(), 25 );
|
|
lstValues->setModel( mModelValues );
|
|
//delete the tmp
|
|
delete tmp;
|
|
|
|
if ( prevSubsetString != mLayer->subsetString() )
|
|
{
|
|
mLayer->setSubsetString( prevSubsetString );
|
|
}
|
|
|
|
lstValues->setCursor( Qt::ArrowCursor );
|
|
}
|
|
|
|
void QgsQueryBuilder::btnGetAllValues_clicked()
|
|
{
|
|
lstValues->setCursor( Qt::WaitCursor );
|
|
|
|
QString prevSubsetString = mLayer->subsetString();
|
|
if ( mUseUnfilteredLayer->isChecked() && !prevSubsetString.isEmpty() )
|
|
{
|
|
mLayer->setSubsetString( QLatin1String( "" ) );
|
|
}
|
|
|
|
//delete connection mModelValues and lstValues
|
|
QStandardItemModel *tmp = new QStandardItemModel();
|
|
lstValues->setModel( tmp );
|
|
//Clear and fill the mModelValues
|
|
fillValues( mModelFields->data( lstFields->currentIndex(), Qt::UserRole + 1 ).toInt(), -1 );
|
|
lstValues->setModel( mModelValues );
|
|
//delete the tmp
|
|
delete tmp;
|
|
|
|
if ( prevSubsetString != mLayer->subsetString() )
|
|
{
|
|
mLayer->setSubsetString( prevSubsetString );
|
|
}
|
|
|
|
lstValues->setCursor( Qt::ArrowCursor );
|
|
}
|
|
|
|
void QgsQueryBuilder::test()
|
|
{
|
|
// test the sql statement to see if it works
|
|
// by counting the number of records that would be
|
|
// returned
|
|
|
|
if ( mLayer->setSubsetString( txtSQL->text() ) )
|
|
{
|
|
mUseUnfilteredLayer->setDisabled( mLayer->subsetString().isEmpty() );
|
|
|
|
QMessageBox::information( this,
|
|
tr( "Query Result" ),
|
|
tr( "The where clause returned %n row(s).", "returned test rows", mLayer->featureCount() ) );
|
|
}
|
|
else if ( mLayer->dataProvider()->hasErrors() )
|
|
{
|
|
QMessageBox::warning( this,
|
|
tr( "Query Failed" ),
|
|
tr( "An error occurred when executing the query." )
|
|
+ tr( "\nThe data provider said:\n%1" ).arg( mLayer->dataProvider()->errors().join( QStringLiteral( "\n" ) ) ) );
|
|
mLayer->dataProvider()->clearErrors();
|
|
}
|
|
else
|
|
{
|
|
QMessageBox::warning( this,
|
|
tr( "Query Failed" ),
|
|
tr( "An error occurred when executing the query." ) );
|
|
}
|
|
}
|
|
|
|
void QgsQueryBuilder::accept()
|
|
{
|
|
if ( !mLayer->setSubsetString( txtSQL->text() ) )
|
|
{
|
|
//error in query - show the problem
|
|
if ( mLayer->dataProvider()->hasErrors() )
|
|
{
|
|
QMessageBox::warning( this,
|
|
tr( "Query Failed" ),
|
|
tr( "An error occurred when executing the query." )
|
|
+ tr( "\nThe data provider said:\n%1" ).arg( mLayer->dataProvider()->errors().join( QStringLiteral( "\n" ) ) ) );
|
|
mLayer->dataProvider()->clearErrors();
|
|
}
|
|
else
|
|
{
|
|
QMessageBox::warning( this, tr( "Error in Query" ), tr( "The subset string could not be set" ) );
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
QDialog::accept();
|
|
}
|
|
|
|
void QgsQueryBuilder::reject()
|
|
{
|
|
if ( mLayer->subsetString() != mOrigSubsetString )
|
|
mLayer->setSubsetString( mOrigSubsetString );
|
|
|
|
QDialog::reject();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnEqual_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " = " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnLessThan_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " < " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnGreaterThan_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " > " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnPct_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( "%" ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnIn_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " IN " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnNotIn_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " NOT IN " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnLike_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " LIKE " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
QString QgsQueryBuilder::sql()
|
|
{
|
|
return txtSQL->text();
|
|
}
|
|
|
|
void QgsQueryBuilder::setSql( const QString &sqlStatement )
|
|
{
|
|
txtSQL->setText( sqlStatement );
|
|
}
|
|
|
|
void QgsQueryBuilder::lstFields_clicked( const QModelIndex &index )
|
|
{
|
|
if ( mPreviousFieldRow != index.row() )
|
|
{
|
|
mPreviousFieldRow = index.row();
|
|
|
|
btnSampleValues->setEnabled( true );
|
|
btnGetAllValues->setEnabled( true );
|
|
|
|
mModelValues->clear();
|
|
}
|
|
}
|
|
|
|
void QgsQueryBuilder::lstFields_doubleClicked( const QModelIndex &index )
|
|
{
|
|
txtSQL->insertText( '\"' + mLayer->fields().at( mModelFields->data( index, Qt::UserRole + 1 ).toInt() ).name() + '\"' );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::lstValues_doubleClicked( const QModelIndex &index )
|
|
{
|
|
QVariant value = mModelValues->data( index, Qt::UserRole + 1 );
|
|
if ( value.isNull() )
|
|
txtSQL->insertText( QStringLiteral( "NULL" ) );
|
|
else if ( value.type() == QVariant::Date && mLayer->providerType() == QLatin1String( "ogr" ) && mLayer->storageType() == QLatin1String( "ESRI Shapefile" ) )
|
|
txtSQL->insertText( '\'' + value.toDate().toString( QStringLiteral( "yyyy/MM/dd" ) ) + '\'' );
|
|
else if ( value.type() == QVariant::Int || value.type() == QVariant::Double || value.type() == QVariant::LongLong )
|
|
txtSQL->insertText( value.toString() );
|
|
else
|
|
txtSQL->insertText( '\'' + value.toString().replace( '\'', QLatin1String( "''" ) ) + '\'' );
|
|
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnLessEqual_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " <= " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnGreaterEqual_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " >= " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnNotEqual_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " != " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnAnd_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " AND " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnNot_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " NOT " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::btnOr_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " OR " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::clear()
|
|
{
|
|
txtSQL->clear();
|
|
mLayer->setSubsetString( QLatin1String( "" ) );
|
|
mUseUnfilteredLayer->setDisabled( true );
|
|
}
|
|
|
|
void QgsQueryBuilder::btnILike_clicked()
|
|
{
|
|
txtSQL->insertText( QStringLiteral( " ILIKE " ) );
|
|
txtSQL->setFocus();
|
|
}
|
|
|
|
void QgsQueryBuilder::setDatasourceDescription( const QString &uri )
|
|
{
|
|
lblDataUri->setText( uri );
|
|
}
|
|
|
|
void QgsQueryBuilder::showHelp()
|
|
{
|
|
QgsHelp::openHelp( QStringLiteral( "working_with_vector/vector_properties.html#query-builder" ) );
|
|
}
|