QGIS API Documentation  3.25.0-Master (6b426f5f8a)
qgslocaleawarenumericlineeditdelegate.cpp
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1 /***************************************************************************
2  qgslocaleawarenumericlineeditdelegate.cpp - QgsLocaleAwareNumericLineEditDelegate
3 
4  ---------------------
5  begin : 5.11.2020
6  copyright : (C) 2020 by Alessandro Pasotti
7  email : elpaso at itopen dot it
8  ***************************************************************************
9  * *
10  * This program is free software; you can redistribute it and/or modify *
11  * it under the terms of the GNU General Public License as published by *
12  * the Free Software Foundation; either version 2 of the License, or *
13  * (at your option) any later version. *
14  * *
15  ***************************************************************************/
16 
17 #include <QLineEdit>
18 
20 #include "qgsdoublevalidator.h"
21 #include "qgsguiutils.h"
22 
24 
25 QgsLocaleAwareNumericLineEditDelegate::QgsLocaleAwareNumericLineEditDelegate( Qgis::DataType dataType, QWidget *parent )
26  : QStyledItemDelegate( parent )
27  , mDataType( dataType )
28 {
29 }
30 
31 QWidget *QgsLocaleAwareNumericLineEditDelegate::createEditor( QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index ) const
32 {
33  Q_UNUSED( option )
34  Q_UNUSED( index )
35  auto editor = new QLineEdit{ parent };
36  editor->setValidator( new QgsDoubleValidator( QgsGuiUtils::significantDigits( mDataType ), editor ) );
37  return editor;
38 }
39 
40 void QgsLocaleAwareNumericLineEditDelegate::setEditorData( QWidget *editor, const QModelIndex &index ) const
41 {
42  QLineEdit *lineEdit { qobject_cast<QLineEdit *>( editor ) };
43  if ( lineEdit )
44  {
45  const QVariant value = index.data( );
46  lineEdit->setText( displayText( value, QLocale() ) );
47  }
48  else
49  {
50  QStyledItemDelegate::setEditorData( editor, index );
51  }
52 }
53 
54 void QgsLocaleAwareNumericLineEditDelegate::setModelData( QWidget *editor, QAbstractItemModel *model, const QModelIndex &index ) const
55 {
56  QLineEdit *lineEdit { qobject_cast<QLineEdit *>( editor ) };
57  if ( ! editor )
58  {
59  QStyledItemDelegate::setModelData( editor, model, index );
60  }
61  const double value { QgsDoubleValidator::toDouble( lineEdit->text() ) };
62  model->setData( index, value );
63 }
64 
65 QString QgsLocaleAwareNumericLineEditDelegate::displayText( const QVariant &value, const QLocale & ) const
66 {
67  return QgsGuiUtils::displayValueWithMaximumDecimals( mDataType, value.toDouble( ) );
68 }
69 
70 void QgsLocaleAwareNumericLineEditDelegate::setDataType( const Qgis::DataType &dataType )
71 {
72  mDataType = dataType;
73 }
74 
DataType
Raster data types.
Definition: qgis.h:129
QgsDoubleValidator is a QLineEdit Validator that combines QDoubleValidator and QRegularExpressionVali...
static double toDouble(const QString &input, bool *ok)
Converts input string to double value.
int significantDigits(const Qgis::DataType rasterDataType)
Returns the maximum number of significant digits a for the given rasterDataType.
QString displayValueWithMaximumDecimals(const Qgis::DataType dataType, const double value, bool displayTrailingZeroes)
Returns a localized string representation of the value with the appropriate number of decimals suppor...