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qgsrelationreferencewidgetwrapper.cpp
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1 /***************************************************************************
2  qgsrelationreferencewidgetwrapper.cpp
3  --------------------------------------
4  Date : 20.4.2013
5  Copyright : (C) 2013 Matthias Kuhn
6  Email : matthias dot kuhn at gmx dot ch
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 
18 #include "qgsproject.h"
19 #include "qgsrelationmanager.h"
20 
21 
22 QgsRelationReferenceWidgetWrapper::QgsRelationReferenceWidgetWrapper( QgsVectorLayer* vl, int fieldIdx, QWidget* editor, QgsMapCanvas* canvas, QgsMessageBar* messageBar, QWidget* parent )
23  : QgsEditorWidgetWrapper( vl, fieldIdx, editor, parent )
24  , mWidget( NULL )
25  , mCanvas( canvas )
26  , mMessageBar( messageBar )
27 {
28 }
29 
31 {
33  w->setSizePolicy( w->sizePolicy().horizontalPolicy(), QSizePolicy::Expanding );
34  return w;
35 }
36 
38 {
39  QgsRelationReferenceWidget* w = dynamic_cast<QgsRelationReferenceWidget*>( editor );
40  if ( !w )
41  {
42  w = new QgsRelationReferenceWidget( editor );
43  }
44 
45  mWidget = w;
46 
47  mWidget->setEditorContext( context(), mCanvas, mMessageBar );
48 
49  bool showForm = config( "ShowForm", true ).toBool();
50  bool mapIdent = config( "MapIdentification", false ).toBool();
51  bool readOnlyWidget = config( "ReadOnly", false ).toBool();
52  bool orderByValue = config( "OrderByValue", false ).toBool();
53 
54  mWidget->setEmbedForm( showForm );
55  mWidget->setReadOnlySelector( readOnlyWidget );
56  mWidget->setAllowMapIdentification( mapIdent );
57  mWidget->setOrderByValue( orderByValue );
58  if ( config( "FilterFields", QVariant() ).isValid() )
59  {
60  mWidget->setFilterFields( config( "FilterFields" ).toStringList() );
61  mWidget->setChainFilters( config( "ChainFilters" ).toBool() );
62  }
63 
64  QgsRelation relation = QgsProject::instance()->relationManager()->relation( config( "Relation" ).toString() );
65 
66  // If this widget is already embedded by the same relation, reduce functionality
67  const QgsAttributeEditorContext* ctx = &context();
68  do
69  {
70  if ( ctx->relation().name() == relation.name() )
71  {
72  mWidget->setEmbedForm( false );
73  mWidget->setReadOnlySelector( false );
74  mWidget->setAllowMapIdentification( false );
75  }
76  ctx = ctx->parentContext();
77  }
78  while ( ctx );
79 
80  mWidget->setRelation( relation, config( "AllowNULL" ).toBool() );
81 
82  connect( mWidget, SIGNAL( foreignKeyChanged( QVariant ) ), this, SLOT( foreignKeyChanged( QVariant ) ) );
83 }
84 
86 {
87  if ( !mWidget )
88  return QVariant( field().type() );
89 
90  QVariant v = mWidget->foreignKey();
91 
92  if ( v.isNull() )
93  {
94  return QVariant( field().type() );
95  }
96  else
97  {
98  return v;
99  }
100 }
101 
102 void QgsRelationReferenceWidgetWrapper::setValue( const QVariant& value )
103 {
104  if ( !mWidget )
105  return;
106 
107  mWidget->setForeignKey( value );
108 }
109 
111 {
112  if ( !mWidget )
113  return;
114 
115  mWidget->setRelationEditable( enabled );
116 }
117 
118 void QgsRelationReferenceWidgetWrapper::foreignKeyChanged( QVariant value )
119 {
120  if ( !value.isValid() || value.isNull() )
121  {
122  value = QVariant( field().type() );
123  }
124  emit valueChanged( value );
125 }