QGIS API Documentation  3.2.0-Bonn (bc43194)
qgsattributetabledelegate.cpp
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1 /***************************************************************************
2  QgsAttributeTableDelegate.cpp
3  --------------------------------------
4  Date : Feb 2009
5  Copyright : (C) 2009 Vita Cizek
6  Email : weetya (at) gmail.com
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 <QItemDelegate>
17 #include <QLineEdit>
18 #include <QComboBox>
19 #include <QPainter>
20 #include <QToolButton>
21 
24 #include "qgsattributetablemodel.h"
25 #include "qgsattributetableview.h"
27 #include "qgseditorwidgetwrapper.h"
29 #include "qgslogger.h"
30 #include "qgsvectordataprovider.h"
31 #include "qgsactionmanager.h"
32 #include "qgsgui.h"
33 #include "qgsvectorlayerjoininfo.h"
35 
36 QgsVectorLayer *QgsAttributeTableDelegate::layer( const QAbstractItemModel *model )
37 {
38  const QgsAttributeTableModel *tm = qobject_cast<const QgsAttributeTableModel *>( model );
39  if ( tm )
40  return tm->layer();
41 
42  const QgsAttributeTableFilterModel *fm = qobject_cast<const QgsAttributeTableFilterModel *>( model );
43  if ( fm )
44  return fm->layer();
45 
46  return nullptr;
47 }
48 
49 const QgsAttributeTableModel *QgsAttributeTableDelegate::masterModel( const QAbstractItemModel *model )
50 {
51  const QgsAttributeTableModel *tm = qobject_cast<const QgsAttributeTableModel *>( model );
52  if ( tm )
53  return tm;
54 
55  const QgsAttributeTableFilterModel *fm = qobject_cast<const QgsAttributeTableFilterModel *>( model );
56  if ( fm )
57  return fm->masterModel();
58 
59  return nullptr;
60 }
61 
62 QWidget *QgsAttributeTableDelegate::createEditor( QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index ) const
63 {
64  Q_UNUSED( option );
65  QgsVectorLayer *vl = layer( index.model() );
66  if ( !vl )
67  return nullptr;
68 
69  int fieldIdx = index.model()->data( index, QgsAttributeTableModel::FieldIndexRole ).toInt();
70  QgsAttributeEditorContext context( masterModel( index.model() )->editorContext(), QgsAttributeEditorContext::Popup );
71 
72  // Update the editor form context with the feature being edited
73  QgsFeatureId fid( index.model()->data( index, QgsAttributeTableModel::FeatureIdRole ).toLongLong() );
74  context.setFormFeature( vl->getFeature( fid ) );
75 
76  QgsEditorWidgetWrapper *eww = QgsGui::editorWidgetRegistry()->create( vl, fieldIdx, nullptr, parent, context );
77  QWidget *w = eww->widget();
78 
79  w->setAutoFillBackground( true );
80  w->setFocusPolicy( Qt::StrongFocus ); // to make sure QMouseEvents are propagated to the editor widget
81 
82  const int fieldOrigin = vl->fields().fieldOrigin( fieldIdx );
83  bool readOnly = true;
84  if ( fieldOrigin == QgsFields::OriginJoin )
85  {
86  int srcFieldIndex;
87  const QgsVectorLayerJoinInfo *info = vl->joinBuffer()->joinForFieldIndex( fieldIdx, vl->fields(), srcFieldIndex );
88 
89  if ( info && info->isEditable() )
90  readOnly = info->joinLayer()->editFormConfig().readOnly( srcFieldIndex );
91  }
92  else
93  readOnly = vl->editFormConfig().readOnly( fieldIdx );
94 
95  eww->setEnabled( !readOnly );
96 
97  return w;
98 }
99 
100 void QgsAttributeTableDelegate::setModelData( QWidget *editor, QAbstractItemModel *model, const QModelIndex &index ) const
101 {
102  QgsVectorLayer *vl = layer( model );
103  if ( !vl )
104  return;
105 
106  int fieldIdx = model->data( index, QgsAttributeTableModel::FieldIndexRole ).toInt();
107  QgsFeatureId fid = model->data( index, QgsAttributeTableModel::FeatureIdRole ).toLongLong();
108  QVariant oldValue = model->data( index, Qt::EditRole );
109 
110  QVariant newValue;
112  if ( !eww )
113  return;
114 
115  newValue = eww->value();
116 
117  if ( ( oldValue != newValue && newValue.isValid() ) || oldValue.isNull() != newValue.isNull() )
118  {
119  // This fixes https://issues.qgis.org/issues/16492
120  QgsFeatureRequest request( fid );
123  QgsFeature feature;
124  vl->getFeatures( request ).nextFeature( feature );
125  if ( feature.isValid() )
126  {
127  vl->beginEditCommand( tr( "Attribute changed" ) );
128  vl->changeAttributeValue( fid, fieldIdx, newValue, oldValue );
129  vl->endEditCommand();
130  }
131  }
132 }
133 
134 void QgsAttributeTableDelegate::setEditorData( QWidget *editor, const QModelIndex &index ) const
135 {
137  if ( !eww )
138  return;
139 
140  eww->setValue( index.model()->data( index, Qt::EditRole ) );
141 }
142 
144 {
145  mFeatureSelectionModel = featureSelectionModel;
146 }
147 
148 void QgsAttributeTableDelegate::paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const
149 {
151 
153  {
154  emit actionColumnItemPainted( index );
155  }
156  else
157  {
158  QgsFeatureId fid = index.model()->data( index, QgsAttributeTableModel::FeatureIdRole ).toLongLong();
159 
160  QStyleOptionViewItem myOpt = option;
161 
162  if ( index.model()->data( index, Qt::EditRole ).isNull() )
163  {
164  myOpt.font.setItalic( true );
165  myOpt.palette.setColor( QPalette::Text, QColor( "gray" ) );
166  }
167 
168  if ( mFeatureSelectionModel && mFeatureSelectionModel->isSelected( fid ) )
169  myOpt.state |= QStyle::State_Selected;
170 
171  QItemDelegate::paint( painter, myOpt, index );
172 
173  if ( option.state & QStyle::State_HasFocus )
174  {
175  QRect r = option.rect.adjusted( 1, 1, -1, -1 );
176  QPen p( QBrush( QColor( 0, 255, 127 ) ), 2 );
177  painter->save();
178  painter->setPen( p );
179  painter->drawRect( r );
180  painter->restore();
181  }
182  }
183 }
bool isValid() const
Returns the validity of this feature.
Definition: qgsfeature.cpp:176
QgsVectorLayer * layer() const
Returns the layer this filter acts on.
QgsVectorLayer * layer() const
Returns the layer this model uses as backend.
virtual bool isSelected(QgsFeatureId fid)
Returns the selection status of a given feature id.
Field comes from a joined layer (originIndex / 1000 = index of the join, originIndex % 1000 = index w...
Definition: qgsfields.h:50
FieldOrigin fieldOrigin(int fieldIdx) const
Gets field&#39;s origin (value from an enumeration)
Definition: qgsfields.cpp:171
QgsAttributeTableModel * masterModel() const
Returns the table model this filter is using.
void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override
Overloads the paint method form the QItemDelegate base class.
Get the field index of this column.
void beginEditCommand(const QString &text)
Create edit command for undo/redo operations.
This class contains context information for attribute editor widgets.
Manages an editor widget Widget and wrapper share the same parent.
QgsFeature getFeature(QgsFeatureId fid) const
Query the layer for the feature with the given id.
QgsFeatureRequest & setSubsetOfAttributes(const QgsAttributeList &attrs)
Set a subset of attributes that will be fetched.
void setEnabled(bool enabled) override
Is used to enable or disable the edit functionality of the managed widget.
The feature class encapsulates a single feature including its id, geometry and a list of field/values...
Definition: qgsfeature.h:62
A model backed by a QgsVectorLayerCache which is able to provide feature/attribute information to a Q...
void actionColumnItemPainted(const QModelIndex &index) const
Is emitted when an action column item is painted.
void setFormFeature(const QgsFeature &feature)
Set current feature for the currently edited form or table row.
void setFeatureSelectionModel(QgsFeatureSelectionModel *featureSelectionModel)
Get the feature id of the feature in this row.
QWidget * createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const override
Used to create an editor for when the user tries to change the contents of a cell.
A widget was opened as a popup (e.g. attribute table editor widget)
void setEditorData(QWidget *editor, const QModelIndex &index) const override
Sets data from model into the editor.
QgsVectorLayer * joinLayer() const
Returns joined layer (may be null if the reference was set by layer ID and not resolved yet) ...
QgsFields fields() const override
Returns the list of fields of this layer.
static QgsEditorWidgetRegistry * editorWidgetRegistry()
Returns the global editor widget registry, used for managing all known edit widget factories...
Definition: qgsgui.cpp:47
static QgsEditorWidgetWrapper * fromWidget(QWidget *widget)
Will return a wrapper for a given widget.
Defines left outer join from our vector layer to some other vector layer.
This class wraps a request for features to a vector layer (or directly its vector data provider)...
virtual void setValue(const QVariant &value)=0
Is called, when the value of the widget needs to be changed.
QgsEditFormConfig editFormConfig
void endEditCommand()
Finish edit command and add it to undo/redo stack.
QgsEditorWidgetWrapper * create(const QString &widgetId, QgsVectorLayer *vl, int fieldIdx, const QVariantMap &config, QWidget *editor, QWidget *parent, const QgsAttributeEditorContext &context=QgsAttributeEditorContext())
Create an attribute editor widget wrapper of a given type for a given field.
QgsVectorLayerJoinBuffer * joinBuffer()
Returns the join buffer object.
QgsFeatureIterator getFeatures(const QgsFeatureRequest &request=QgsFeatureRequest()) const override
Query the layer for features specified in request.
void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const override
Sets data from editor back to model.
virtual QVariant value() const =0
Will be used to access the widget&#39;s value.
const QgsVectorLayerJoinInfo * joinForFieldIndex(int index, const QgsFields &fields, int &sourceFieldIndex) const
Finds the vector join for a layer field index.
qint64 QgsFeatureId
Definition: qgsfeature.h:37
bool changeAttributeValue(QgsFeatureId fid, int field, const QVariant &newValue, const QVariant &oldValue=QVariant(), bool skipDefaultValues=false)
Changes an attribute value for a feature (but does not immediately commit the changes).
QWidget * widget()
Access the widget managed by this wrapper.
bool readOnly(int idx) const
This returns true if the field is manually set to read only or if the field does not support editing ...
QList< int > QgsAttributeList
Definition: qgsfield.h:27
bool isEditable() const
Returns whether joined fields may be edited through the form of the target layer. ...
bool nextFeature(QgsFeature &f)
Geometry is not required. It may still be returned if e.g. required for a filter condition.
Represents a vector layer which manages a vector based data sets.
QgsFeatureRequest & setFlags(QgsFeatureRequest::Flags flags)
Sets flags that affect how features will be fetched.