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qgstexteditwrapper.cpp
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qgstexteditwrapper.cpp
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/***************************************************************************
qgstexteditwrapper.cpp
--------------------------------------
Date : 5.1.2014
Copyright : (C) 2014 Matthias Kuhn
Email : matthias at opengis dot ch
***************************************************************************
* *
* 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 "qgstexteditwrapper.h"
#include "qgsfields.h"
#include "qgsfieldvalidator.h"
#include "qgsfilterlineedit.h"
#include "qgsapplication.h"
#include "qgsjsonutils.cpp"
#include "qgsmessagebar.h"
#include "qgslogger.h"
#include <QSettings>
#include <nlohmann/json.hpp>
QgsTextEditWrapper::QgsTextEditWrapper( QgsVectorLayer *layer, int fieldIdx, QWidget *editor, QWidget *parent )
: QgsEditorWidgetWrapper( layer, fieldIdx, editor, parent )
{
}
QVariant QgsTextEditWrapper::value() const
{
QString v;
if ( mTextEdit )
{
if ( config( QStringLiteral( "UseHtml" ) ).toBool() )
{
v = mTextEdit->toHtml();
}
else
{
v = mTextEdit->toPlainText();
}
}
if ( mPlainTextEdit )
{
v = mPlainTextEdit->toPlainText();
}
if ( mLineEdit )
{
v = mLineEdit->text();
}
if ( ( v.isEmpty() && ( field().type() == QVariant::Int || field().type() == QVariant::Double || field().type() == QVariant::LongLong || field().type() == QVariant::Date ) ) ||
v == QgsApplication::nullRepresentation() )
return QVariant( field().type() );
if ( !defaultValue().isNull() && v == defaultValue().toString() )
{
return defaultValue();
}
QVariant res( v );
// treat VariantMap fields including JSON differently
if ( field().type() != QVariant::Map && field().convertCompatible( res ) )
{
return res;
}
else if ( field().type() == QVariant::String && field().length() > 0 )
{
// for string fields convertCompatible may return false due to field length limit - in this case just truncate
// input rather then discarding it entirely
return QVariant( v.left( field().length() ) );
}
else if ( field().type() == QVariant::Map )
{
// replace empty string (invalid) with quoted empty string
if ( v.isEmpty() )
{
QVariant qjson = QgsJsonUtils::parseJson( std::string( "\"\"" ) );
mInvalidJSON = false;
return qjson;
}
if ( json::accept( v.toUtf8() ) )
{
QVariant qjson = QgsJsonUtils::parseJson( v.toStdString() );
mInvalidJSON = false;
return qjson;
}
else
// return null value if json is invalid
{
if ( v.length() > 0 )
{
mInvalidJSON = true;
}
else
{
mInvalidJSON = false;
}
return QVariant();
}
}
else
{
return QVariant( field().type() );
}
}
QWidget *QgsTextEditWrapper::createWidget( QWidget *parent )
{
mForm = qobject_cast<QgsAttributeForm *>( parent );
if ( config( QStringLiteral( "IsMultiline" ) ).toBool() )
{
if ( config( QStringLiteral( "UseHtml" ) ).toBool() )
{
return new QTextBrowser( parent );
}
else
{
return new QPlainTextEdit( parent );
}
}
else
{
return new QgsFilterLineEdit( parent );
}
}
void QgsTextEditWrapper::initWidget( QWidget *editor )
{
mInvalidJSON = false;
mTextBrowser = qobject_cast<QTextBrowser *>( editor );
mTextEdit = qobject_cast<QTextEdit *>( editor );
mPlainTextEdit = qobject_cast<QPlainTextEdit *>( editor );
mLineEdit = qobject_cast<QLineEdit *>( editor );
if ( mTextEdit )
connect( mTextEdit, &QTextEdit::textChanged, this, &QgsEditorWidgetWrapper::emitValueChanged );
if ( mPlainTextEdit )
connect( mPlainTextEdit, &QPlainTextEdit::textChanged, this, &QgsEditorWidgetWrapper::emitValueChanged );
if ( mLineEdit )
{
mLineEdit->setValidator( new QgsFieldValidator( mLineEdit, field(), defaultValue().toString() ) );
QVariant defVal = defaultValue();
if ( defVal.isNull() )
{
defVal = QgsApplication::nullRepresentation();
}
QgsFilterLineEdit *fle = qobject_cast<QgsFilterLineEdit *>( mLineEdit );
if ( field().type() == QVariant::Int || field().type() == QVariant::Double || field().type() == QVariant::LongLong || field().type() == QVariant::Date )
{
mPlaceholderText = defVal.toString();
mLineEdit->setPlaceholderText( mPlaceholderText );
}
else if ( fle )
{
fle->setNullValue( defVal.toString() );
}
connect( mLineEdit, &QLineEdit::textChanged, this, [ = ]( const QString & value )
{
Q_NOWARN_DEPRECATED_PUSH
emit valueChanged( value );
Q_NOWARN_DEPRECATED_POP
emit valuesChanged( value );
} );
connect( mLineEdit, &QLineEdit::textChanged, this, &QgsTextEditWrapper::textChanged );
mWritablePalette = mLineEdit->palette();
mReadOnlyPalette = mLineEdit->palette();
}
}
bool QgsTextEditWrapper::valid() const
{
return mLineEdit || mTextEdit || mPlainTextEdit;
}
void QgsTextEditWrapper::showIndeterminateState()
{
//note - this is deliberately a zero length string, not a null string!
if ( mTextEdit )
mTextEdit->blockSignals( true );
if ( mPlainTextEdit )
mPlainTextEdit->blockSignals( true );
if ( mLineEdit )
{
mLineEdit->blockSignals( true );
// for indeterminate state we need to clear the placeholder text - we want an empty line edit, not
// one showing the default value (e.g., "NULL")
mLineEdit->setPlaceholderText( QString() );
}
setWidgetValue( QString() );
if ( mTextEdit )
mTextEdit->blockSignals( false );
if ( mPlainTextEdit )
mPlainTextEdit->blockSignals( false );
if ( mLineEdit )
mLineEdit->blockSignals( false );
}
void QgsTextEditWrapper::setFeature( const QgsFeature &feature )
{
// Do nothing if the value has not changed
if ( mInvalidJSON )
mForm->displayWarning( tr( "Your JSON was invalid and has been reverted back to the last valid edit or the original data" ) );
{
mInvalidJSON = false;
}
setFormFeature( feature );
setValue( feature.attribute( fieldIdx() ) );
}
void QgsTextEditWrapper::updateValues( const QVariant &val, const QVariantList & )
{
if ( mLineEdit )
{
//restore placeholder text, which may have been removed by showIndeterminateState()
mLineEdit->setPlaceholderText( mPlaceholderText );
}
setWidgetValue( val );
}
void QgsTextEditWrapper::setEnabled( bool enabled )
{
if ( mTextEdit )
mTextEdit->setReadOnly( !enabled );
if ( mPlainTextEdit )
mPlainTextEdit->setReadOnly( !enabled );
if ( mLineEdit )
{
mLineEdit->setReadOnly( !enabled );
if ( enabled )
mLineEdit->setPalette( mWritablePalette );
else
{
mLineEdit->setPalette( mReadOnlyPalette );
// removing frame + setting transparent background to distinguish the readonly lineEdit from a normal one
// did not get this working via the Palette:
mLineEdit->setStyleSheet( QStringLiteral( "background-color: rgba(255, 255, 255, 75%);" ) );
}
mLineEdit->setFrame( enabled );
}
}
bool QgsTextEditWrapper::isInvalidJSON()
{
return mInvalidJSON;
}
void QgsTextEditWrapper::textChanged( const QString & )
{
if ( mLineEdit )
{
//restore placeholder text, which may have been removed by showIndeterminateState()
mLineEdit->setPlaceholderText( mPlaceholderText );
}
}
void QgsTextEditWrapper::setWidgetValue( const QVariant &val )
{
QString v;
if ( val.isNull() )
{
if ( !( field().type() == QVariant::Int || field().type() == QVariant::Double || field().type() == QVariant::LongLong || field().type() == QVariant::Date ) )
v = QgsApplication::nullRepresentation();
}
else if ( field().type() == QVariant::Map )
{
// this has to be overridden for json which has only values (i.e. no objects or arrays), as qgsfield.cpp displayString()
// uses QJsonDocument which doesn't recognise this as valid JSON although it technically is
if ( field().displayString( val ).isEmpty() )
{
if ( val.type() == QVariant::String && val.toString() != QStringLiteral( "\"\"" ) )
{
v = val.toString().append( "\"" ).insert( 0, "\"" );
}
else
{
v = val.toString();
}
}
else
{
v = field().displayString( val );
}
}
else if ( val.type() == QVariant::Double && std::isnan( val.toDouble() ) )
{
v = QgsApplication::nullRepresentation();
}
else
{
v = field().displayString( val );
}
// For numbers, remove the group separator that might cause validation errors
// when the user is editing the field value.
// We are checking for editable layer because in the form field context we do not
// want to strip the separator unless the layer is editable.
// Also check that we have something like a number in the value to avoid
// stripping out dots from nextval when we have a schema: see https://github.com/qgis/QGIS/issues/28021
// "Wrong sequence detection with Postgres"
bool canConvertToDouble;
QLocale().toDouble( v, &canConvertToDouble );
if ( canConvertToDouble && layer() && layer()->isEditable() && ! QLocale().groupSeparator().isNull() && field().isNumeric() )
{
v = v.remove( QLocale().groupSeparator() );
}
if ( mTextEdit )
{
if ( val != value() )
{
if ( config( QStringLiteral( "UseHtml" ) ).toBool() )
{
mTextEdit->setHtml( v );
if ( mTextBrowser )
{
mTextBrowser->setTextInteractionFlags( Qt::LinksAccessibleByMouse );
mTextBrowser->setOpenExternalLinks( true );
}
}
else
mTextEdit->setPlainText( v );
}
}
if ( mPlainTextEdit )
{
if ( val != value() )
mPlainTextEdit->setPlainText( v );
}
if ( mLineEdit )
mLineEdit->setText( v );
}
void QgsTextEditWrapper::setHint( const QString &hintText )
{
if ( hintText.isNull() )
mPlaceholderText = mPlaceholderTextBackup;
else
{
mPlaceholderTextBackup = mPlaceholderText;
mPlaceholderText = hintText;
}
mLineEdit->setPlaceholderText( mPlaceholderText );
}