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qgsdefaultsearchwidgetwrapper.cpp
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qgsdefaultsearchwidgetwrapper.cpp
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/***************************************************************************
qgsdefaultsearchwidgettwrapper.cpp
--------------------------------------
Date : 31.5.2015
Copyright : (C) 2015 Karolina Alexiou (carolinux)
Email : carolinegr at gmail dot 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 "qgsdefaultsearchwidgetwrapper.h"
#include "qgsfield.h"
#include "qgsfieldvalidator.h"
#include "qgsexpression.h"
#include <QSettings>
#include <QHBoxLayout>
QgsDefaultSearchWidgetWrapper::QgsDefaultSearchWidgetWrapper( QgsVectorLayer* vl, int fieldIdx, QWidget* parent )
: QgsSearchWidgetWrapper( vl, fieldIdx, parent )
, mLineEdit( nullptr )
, mCheckbox( nullptr )
, mContainer( nullptr )
, mCaseString( QString( "LIKE" ) )
{
}
QString QgsDefaultSearchWidgetWrapper::expression()
{
return mExpression;
}
void QgsDefaultSearchWidgetWrapper::setCaseString( int caseSensitiveCheckState )
{
if ( caseSensitiveCheckState == Qt::Checked )
{
mCaseString = "LIKE";
}
else
{
mCaseString = "ILIKE";
}
// need to update also the line edit
setExpression( mLineEdit->text() );
if ( applyDirectly() )
emit expressionChanged( mExpression );
}
void QgsDefaultSearchWidgetWrapper::setExpression( QString exp )
{
QVariant::Type fldType = layer()->fields().at( mFieldIdx ).type();
bool numeric = ( fldType == QVariant::Int || fldType == QVariant::Double || fldType == QVariant::LongLong );
QSettings settings;
QString nullValue = settings.value( "qgis/nullValue", "NULL" ).toString();
QString fieldName = layer()->fields().at( mFieldIdx ).name();
QString str;
if ( exp == nullValue )
{
str = QString( "%1 IS NULL" ).arg( QgsExpression::quotedColumnRef( fieldName ) );
}
else
{
str = QString( "%1 %2 '%3'" )
.arg( QgsExpression::quotedColumnRef( fieldName ),
numeric ? "=" : mCaseString,
numeric ?
exp.replace( '\'', "''" )
:
'%' + exp.replace( '\'', "''" ) + '%' ); // escape quotes
}
mExpression = str;
}
QWidget* QgsDefaultSearchWidgetWrapper::createWidget( QWidget* parent )
{
return new QWidget( parent );
}
bool QgsDefaultSearchWidgetWrapper::applyDirectly()
{
return false;
}
QgsSearchWidgetWrapper::FilterFlags QgsDefaultSearchWidgetWrapper::supportedFlags() const
{
FilterFlags flags = EqualTo | NotEqualTo | IsNull | IsNotNull;
QVariant::Type fldType = layer()->fields().at( mFieldIdx ).type();
switch ( fldType )
{
case QVariant::Int:
case QVariant::UInt:
case QVariant::Double:
case QVariant::LongLong:
case QVariant::ULongLong:
case QVariant::Date:
case QVariant::DateTime:
case QVariant::Time:
flags |= GreaterThan | LessThan | GreaterThanOrEqualTo | LessThanOrEqualTo | Between | IsNotBetween;
break;
case QVariant::String:
flags |= Contains | DoesNotContain;
break;
default:
break;
}
return flags;
}
QgsSearchWidgetWrapper::FilterFlags QgsDefaultSearchWidgetWrapper::defaultFlags() const
{
QVariant::Type fldType = layer()->fields().at( mFieldIdx ).type();
switch ( fldType )
{
case QVariant::Int:
case QVariant::UInt:
case QVariant::Double:
case QVariant::LongLong:
case QVariant::ULongLong:
//numeric
return EqualTo;
case QVariant::Date:
case QVariant::DateTime:
case QVariant::Time:
return EqualTo;
case QVariant::String:
return Contains;
default:
break;
}
return EqualTo;
}
QString QgsDefaultSearchWidgetWrapper::createExpression( QgsSearchWidgetWrapper::FilterFlags flags ) const
{
//clear any unsupported flags
flags &= supportedFlags();
QVariant::Type fldType = layer()->fields().at( mFieldIdx ).type();
QString fieldName = QgsExpression::quotedColumnRef( layer()->fields().at( mFieldIdx ).name() );
if ( flags & IsNull )
return fieldName + " IS NULL";
if ( flags & IsNotNull )
return fieldName + " IS NOT NULL";
switch ( fldType )
{
case QVariant::Int:
case QVariant::UInt:
case QVariant::Double:
case QVariant::LongLong:
case QVariant::ULongLong:
{
if ( flags & EqualTo )
return fieldName + '=' + mLineEdit->text();
else if ( flags & NotEqualTo )
return fieldName + "<>" + mLineEdit->text();
else if ( flags & GreaterThan )
return fieldName + '>' + mLineEdit->text();
else if ( flags & LessThan )
return fieldName + '<' + mLineEdit->text();
else if ( flags & GreaterThanOrEqualTo )
return fieldName + ">=" + mLineEdit->text();
else if ( flags & LessThanOrEqualTo )
return fieldName + "<=" + mLineEdit->text();
break;
}
case QVariant::Date:
case QVariant::DateTime:
case QVariant::Time:
{
if ( flags & EqualTo )
return fieldName + "='" + mLineEdit->text() + '\'';
else if ( flags & NotEqualTo )
return fieldName + "<>'" + mLineEdit->text() + '\'';
else if ( flags & GreaterThan )
return fieldName + ">'" + mLineEdit->text() + '\'';
else if ( flags & LessThan )
return fieldName + "<'" + mLineEdit->text() + '\'';
else if ( flags & GreaterThanOrEqualTo )
return fieldName + ">='" + mLineEdit->text() + '\'';
else if ( flags & LessThanOrEqualTo )
return fieldName + "<='" + mLineEdit->text() + '\'';
break;
}
case QVariant::String:
{
// case insensitive!
if ( flags & EqualTo || flags & NotEqualTo )
{
if ( mCheckbox && mCheckbox->isChecked() )
return fieldName + ( flags & EqualTo ? "=" : "<>" )
+ QgsExpression::quotedString( mLineEdit->text() );
else
return QString( "lower(%1)" ).arg( fieldName )
+ ( flags & EqualTo ? "=" : "<>" ) +
QString( "lower(%1)" ).arg( QgsExpression::quotedString( mLineEdit->text() ) );
}
else if ( flags & Contains || flags & DoesNotContain )
{
QString exp = fieldName + ( mCheckbox && mCheckbox->isChecked() ? " LIKE " : " ILIKE " );
QString value = QgsExpression::quotedString( mLineEdit->text() );
value.chop( 1 );
value = value.remove( 0, 1 );
exp += "'%" + value + "%'";
if ( flags & DoesNotContain )
exp.prepend( "NOT (" ).append( ")" );
return exp;
}
break;
}
default:
break;
}
return QString();
}
void QgsDefaultSearchWidgetWrapper::clearWidget()
{
mLineEdit->setText( QString() );
}
void QgsDefaultSearchWidgetWrapper::setEnabled( bool enabled )
{
mLineEdit->setEnabled( enabled );
if ( mCheckbox )
mCheckbox->setEnabled( enabled );
}
void QgsDefaultSearchWidgetWrapper::initWidget( QWidget* widget )
{
mContainer = widget;
mContainer->setLayout( new QHBoxLayout() );
mContainer->layout()->setMargin( 0 );
mContainer->layout()->setContentsMargins( 0, 0, 0, 0 );
mLineEdit = new QgsFilterLineEdit();
mContainer->layout()->addWidget( mLineEdit );
QVariant::Type fldType = layer()->fields().at( mFieldIdx ).type();
if ( fldType == QVariant::String )
{
mCheckbox = new QCheckBox( "Case sensitive" );
mContainer->layout()->addWidget( mCheckbox );
connect( mCheckbox, SIGNAL( stateChanged( int ) ), this, SLOT( setCaseString( int ) ) );
mCheckbox->setChecked( Qt::Unchecked );
}
connect( mLineEdit, SIGNAL( textChanged( QString ) ), this, SLOT( textChanged( QString ) ) );
connect( mLineEdit, SIGNAL( returnPressed() ), this, SLOT( filterChanged() ) );
connect( mLineEdit, SIGNAL( textEdited( QString ) ), this, SIGNAL( valueChanged() ) );
mCaseString = "ILIKE";
}
bool QgsDefaultSearchWidgetWrapper::valid() const
{
return true;
}
QgsFilterLineEdit* QgsDefaultSearchWidgetWrapper::lineEdit()
{
return mLineEdit;
}
QCheckBox* QgsDefaultSearchWidgetWrapper::caseSensitiveCheckBox()
{
return mCheckbox;
}
void QgsDefaultSearchWidgetWrapper::filterChanged()
{
emit expressionChanged( mExpression );
}
void QgsDefaultSearchWidgetWrapper::textChanged( const QString& text )
{
if ( text.isEmpty() )
emit valueCleared();
setExpression( text );
}