QGIS API Documentation 3.40.0-Bratislava (b56115d8743)
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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
30#include "qgsactionmanager.h"
31#include "qgsgui.h"
34#include "qgsrendercontext.h"
35
36QgsVectorLayer *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
49const 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
62QWidget *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 const int fieldIdx = index.model()->data( index, static_cast< int >( QgsAttributeTableModel::CustomRole::FieldIndex ) ).toInt();
70 QgsAttributeEditorContext context( masterModel( index.model() )->editorContext(), QgsAttributeEditorContext::Popup );
71
72 // Update the editor form context with the feature being edited
73 const QgsFeatureId fid( index.model()->data( index, static_cast< int >( QgsAttributeTableModel::CustomRole::FeatureId ) ).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 Qgis::FieldOrigin fieldOrigin = vl->fields().fieldOrigin( fieldIdx );
83 bool readOnly = true;
84 if ( fieldOrigin == Qgis::FieldOrigin::Join )
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
100void QgsAttributeTableDelegate::setModelData( QWidget *editor, QAbstractItemModel *model, const QModelIndex &index ) const
101{
102 QgsVectorLayer *vl = layer( model );
103 if ( !vl )
104 return;
105
106 const int fieldIdx = model->data( index, static_cast< int >( QgsAttributeTableModel::CustomRole::FieldIndex ) ).toInt();
107 const QgsFeatureId fid = model->data( index, static_cast< int >( QgsAttributeTableModel::CustomRole::FeatureId ) ).toLongLong();
108 const QVariant oldValue = model->data( index, Qt::EditRole );
109
111 if ( !eww )
112 return;
113
114 QList<int> indexes = QList<int>() << fieldIdx;
115 QVariantList newValues = QVariantList() << eww->value();
116 const QStringList additionalFields = eww->additionalFields();
117 for ( const QString &fieldName : additionalFields )
118 {
119 indexes << eww->layer()->fields().lookupField( fieldName );
120 }
121 newValues.append( eww->additionalFieldValues() );
122
123 if ( ( oldValue != newValues.at( 0 ) && newValues.at( 0 ).isValid() )
124 || QgsVariantUtils::isNull( oldValue ) != QgsVariantUtils::isNull( newValues.at( 0 ) )
125 || newValues.count() > 1 )
126 {
127 // This fixes https://github.com/qgis/QGIS/issues/24398
128 QgsFeatureRequest request( fid );
130 QgsFeature feature;
131 vl->getFeatures( request ).nextFeature( feature );
132 if ( feature.isValid() )
133 {
134 vl->beginEditCommand( tr( "Attribute changed" ) );
135 for ( int i = 0; i < newValues.count(); i++ )
136 vl->changeAttributeValue( fid, indexes.at( i ), newValues.at( i ), feature.attribute( indexes.at( i ) ) );
137 vl->endEditCommand();
138 }
139 }
140}
141
142void QgsAttributeTableDelegate::setEditorData( QWidget *editor, const QModelIndex &index ) const
143{
145 if ( !eww )
146 return;
147
148 const QVariant value = index.model()->data( index, Qt::EditRole );
149 const QStringList additionalFields = eww->additionalFields();
150
151 if ( !additionalFields.empty() )
152 {
153 const QgsAttributeTableModel *model = masterModel( index.model() );
154 if ( model )
155 {
156 const QgsFeature feat = model->feature( index );
157 QVariantList additionalFieldValues;
158 for ( const QString &fieldName : additionalFields )
159 {
160 additionalFieldValues << feat.attribute( fieldName );
161 }
162 eww->setValues( value, additionalFieldValues );
163 }
164 }
165 else
166 {
167 eww->setValues( value, QVariantList() );
168 }
169}
170
172{
173 mFeatureSelectionModel = featureSelectionModel;
174}
175
176void QgsAttributeTableDelegate::paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const
177{
178 const QgsAttributeTableFilterModel::ColumnType columnType = static_cast<QgsAttributeTableFilterModel::ColumnType>( index.model()->data( index, static_cast< int >( QgsAttributeTableFilterModel::CustomRole::Type ) ).toInt() );
179
181 {
182 emit actionColumnItemPainted( index );
183 }
184 else
185 {
186 const QgsFeatureId fid = index.model()->data( index, static_cast< int >( QgsAttributeTableModel::CustomRole::FeatureId ) ).toLongLong();
187
188 QStyleOptionViewItem myOpt = option;
189
190 if ( QgsVariantUtils::isNull( index.model()->data( index, Qt::EditRole ) ) )
191 {
192 myOpt.font.setItalic( true );
193 myOpt.palette.setColor( QPalette::Text, QColor( "gray" ) );
194 }
195
196 if ( mFeatureSelectionModel && mFeatureSelectionModel->isSelected( fid ) )
197 myOpt.state |= QStyle::State_Selected;
198
199 QItemDelegate::paint( painter, myOpt, index );
200
201 if ( option.state & QStyle::State_HasFocus )
202 {
203 const QRect r = option.rect.adjusted( 1, 1, -1, -1 );
204 const QPen p( QBrush( QColor( 0, 255, 127 ) ), 2 );
205 const QgsScopedQPainterState painterState( painter );
206 painter->setPen( p );
207 painter->drawRect( r );
208 }
209 }
210}
@ NoGeometry
Geometry is not required. It may still be returned if e.g. required for a filter condition.
FieldOrigin
Field origin.
Definition qgis.h:1551
@ Join
Field originates from a joined layer.
This class contains context information for attribute editor widgets.
void setFormFeature(const QgsFeature &feature)
Set current feature for the currently edited form or table row.
@ Popup
A widget was opened as a popup (e.g. attribute table editor widget)
void actionColumnItemPainted(const QModelIndex &index) const
Emitted when an action column item is painted.
void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const override
Sets data from editor back to model.
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.
void setEditorData(QWidget *editor, const QModelIndex &index) const override
Sets data from model into the editor.
void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override
Overloads the paint method form the QItemDelegate base class.
void setFeatureSelectionModel(QgsFeatureSelectionModel *featureSelectionModel)
@ Type
The type of a given column.
QgsAttributeTableModel * masterModel() const
Returns the table model this filter is using.
@ ColumnTypeActionButton
This column shows action buttons.
QgsVectorLayer * layer() const
Returns the layer this filter acts on.
A model backed by a QgsVectorLayerCache which is able to provide feature/attribute information to a Q...
const QgsAttributeEditorContext & editorContext() const
Returns the context in which this table is shown.
QgsFeature feature(const QModelIndex &idx) const
Returns the feature attributes at given model index.
QgsVectorLayer * layer() const
Returns the layer this model uses as backend.
@ FeatureId
Get the feature id of the feature in this row.
@ FieldIndex
Get the field index of this column.
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 ...
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.
Manages an editor widget Widget and wrapper share the same parent.
virtual QVariant value() const =0
Will be used to access the widget's value.
virtual QVariantList additionalFieldValues() const
Will be used to access the widget's values for potential additional fields handled by the widget.
virtual QStringList additionalFields() const
Returns the list of additional fields which the editor handles.
void setEnabled(bool enabled) override
Is used to enable or disable the edit functionality of the managed widget.
void setValues(const QVariant &value, const QVariantList &additionalValues)
Is called when the value of the widget or additional field values needs to be changed.
static QgsEditorWidgetWrapper * fromWidget(QWidget *widget)
Will return a wrapper for a given widget.
bool nextFeature(QgsFeature &f)
Fetch next feature and stores in f, returns true on success.
This class wraps a request for features to a vector layer (or directly its vector data provider).
QgsFeatureRequest & setFlags(Qgis::FeatureRequestFlags flags)
Sets flags that affect how features will be fetched.
virtual bool isSelected(QgsFeatureId fid)
Returns the selection status of a given feature id.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition qgsfeature.h:58
bool isValid() const
Returns the validity of this feature.
Q_INVOKABLE QVariant attribute(const QString &name) const
Lookup attribute value by attribute name.
Qgis::FieldOrigin fieldOrigin(int fieldIdx) const
Returns the field's origin (value from an enumeration).
Q_INVOKABLE int lookupField(const QString &fieldName) const
Looks up field's index from the field name.
static QgsEditorWidgetRegistry * editorWidgetRegistry()
Returns the global editor widget registry, used for managing all known edit widget factories.
Definition qgsgui.cpp:93
Scoped object for saving and restoring a QPainter object's state.
static bool isNull(const QVariant &variant, bool silenceNullWarnings=false)
Returns true if the specified variant should be considered a NULL value.
const QgsVectorLayerJoinInfo * joinForFieldIndex(int index, const QgsFields &fields, int &sourceFieldIndex) const
Finds the vector join for a layer field index.
Defines left outer join from our vector layer to some other vector layer.
bool isEditable() const
Returns whether joined fields may be edited through the form of the target layer.
QgsVectorLayer * joinLayer() const
Returns joined layer (may be nullptr if the reference was set by layer ID and not resolved yet)
Represents a vector layer which manages a vector based data sets.
Q_INVOKABLE bool changeAttributeValue(QgsFeatureId fid, int field, const QVariant &newValue, const QVariant &oldValue=QVariant(), bool skipDefaultValues=false, QgsVectorLayerToolsContext *context=nullptr)
Changes an attribute value for a feature (but does not immediately commit the changes).
QgsFeatureIterator getFeatures(const QgsFeatureRequest &request=QgsFeatureRequest()) const FINAL
Queries the layer for features specified in request.
void endEditCommand()
Finish edit command and add it to undo/redo stack.
QgsVectorLayerJoinBuffer * joinBuffer()
Returns the join buffer object.
void beginEditCommand(const QString &text)
Create edit command for undo/redo operations.
QgsEditFormConfig editFormConfig
Q_INVOKABLE QgsFeature getFeature(QgsFeatureId fid) const
Queries the layer for the feature with the given id.
QWidget * widget()
Access the widget managed by this wrapper.
QgsVectorLayer * layer() const
Returns the vector layer associated with the widget.
qint64 QgsFeatureId
64 bit feature ids negative numbers are used for uncommitted/newly added features