QGIS API Documentation  2.15.0-Master (af20121)
qgsfieldproxymodel.cpp
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1 /***************************************************************************
2  qgsfieldproxymodel.cpp
3  --------------------------------------
4  Date : 01.04.2014
5  Copyright : (C) 2014 Denis Rouzaud
6  Email : [email protected]
7 ***************************************************************************
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 ***************************************************************************/
15 
16 #include "qgsfieldproxymodel.h"
17 #include "qgsfieldmodel.h"
18 #include "qgsvectorlayer.h"
19 
21  : QSortFilterProxyModel( parent )
22  , mFilters( All )
23  , mModel( new QgsFieldModel( this ) )
24 {
25  setSourceModel( mModel );
26 }
27 
29 {
30  mFilters = filters;
32  return this;
33 }
34 
35 bool QgsFieldProxyModel::filterAcceptsRow( int source_row, const QModelIndex &source_parent ) const
36 {
37  if ( mFilters.testFlag( All ) )
38  return true;
39 
40  QModelIndex index = sourceModel()->index( source_row, 0, source_parent );
42 
43  // if expression, consider valid
44  if ( typeVar.isNull() )
45  return true;
46 
47  bool ok;
48  QVariant::Type type = ( QVariant::Type )typeVar.toInt( &ok );
49  if ( !ok )
50  return true;
51 
52  if (( mFilters.testFlag( String ) && type == QVariant::String ) ||
53  ( mFilters.testFlag( LongLong ) && type == QVariant::LongLong ) ||
54  ( mFilters.testFlag( Int ) && type == QVariant::Int ) ||
55  ( mFilters.testFlag( Double ) && type == QVariant::Double ) ||
56  ( mFilters.testFlag( Date ) && type == QVariant::Date ) ||
57  ( mFilters.testFlag( Date ) && type == QVariant::DateTime ) ||
58  ( mFilters.testFlag( Time ) && type == QVariant::Time ) )
59  return true;
60 
61  return false;
62 }
63 
64 bool QgsFieldProxyModel::lessThan( const QModelIndex &left, const QModelIndex &right ) const
65 {
66  // order is field order, then expressions
67  bool lok, rok;
68  int leftId = sourceModel()->data( left, QgsFieldModel::FieldIndexRole ).toInt( &lok );
69  int rightId = sourceModel()->data( right, QgsFieldModel::FieldIndexRole ).toInt( &rok );
70 
71  if ( !lok )
72  return false;
73  if ( !rok )
74  return true;
75 
76  return leftId < rightId;
77 }
virtual QModelIndex index(int row, int column, const QModelIndex &parent) const
QgsFieldProxyModel * setFilters(const QgsFieldProxyModel::Filters &filters)
Set flags that affect how fields are filtered in the model.
virtual QModelIndex index(int row, int column, const QModelIndex &parent) const =0
const Filters & filters() const
Returns the filters controlling displayed fields.
virtual void setSourceModel(QAbstractItemModel *sourceModel)
The QgsFieldModel class is a model to display the list of fields of a layer in widgets.
Definition: qgsfieldmodel.h:31
The QgsFieldProxyModel class provides an easy to use model to display the list of fields of a layer...
int toInt(bool *ok) const
bool isNull() const
QgsFieldProxyModel(QObject *parent=nullptr)
QgsFieldProxModel creates a proxy model with a QgsFieldModel as source model.
virtual QVariant data(const QModelIndex &index, int role) const =0
bool lessThan(const QModelIndex &left, const QModelIndex &right) const override
QAbstractItemModel * sourceModel() const
bool filterAcceptsRow(int source_row, const QModelIndex &source_parent) const override