QGIS API Documentation 3.27.0-Master (f261cc1f8b)
qgsprocessingfieldmapwidgetwrapper.h
Go to the documentation of this file.
1/***************************************************************************
2 qgsprocessingfieldmapwidgetwrapper.h
3 ---------------------
4 Date : June 2020
5 Copyright : (C) 2020 by Nyall Dawson
6 Email : nyall dot dawson at gmail dot 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#ifndef QGSPROCESSINGFIELDMAPWIDGETWRAPPER_H
17#define QGSPROCESSINGFIELDMAPWIDGETWRAPPER_H
18
19#define SIP_NO_FILE
20
23
24#include "ui_qgsprocessingfieldsmappingpanelbase.h"
25
26class QLineEdit;
27class QToolButton;
28
30
31
32class GUI_EXPORT QgsProcessingFieldMapPanelWidget : public QgsPanelWidget, private Ui::QgsProcessingFieldMapPanelBase
33{
34 Q_OBJECT
35
36 public:
37 QgsProcessingFieldMapPanelWidget( QWidget *parent = nullptr );
38
39 void setLayer( QgsVectorLayer *layer );
40 QgsVectorLayer *layer();
41 QVariant value() const;
42 void setValue( const QVariant &value );
43
48 void registerExpressionContextGenerator( const QgsExpressionContextGenerator *generator );
49
50 signals:
51
52 void changed();
53
54 private slots:
55 void loadFieldsFromLayer();
56 void addField();
57 void loadLayerFields();
58
59 private:
60 QgsFieldMappingModel *mModel = nullptr;
61
62 QgsVectorLayer *mLayer = nullptr;
63 bool mBlockChangedSignal = false;
64};
65
66
67class GUI_EXPORT QgsProcessingFieldMapParameterDefinitionWidget : public QgsProcessingAbstractParameterDefinitionWidget
68{
69 Q_OBJECT
70 public:
71
72 QgsProcessingFieldMapParameterDefinitionWidget( QgsProcessingContext &context,
73 const QgsProcessingParameterWidgetContext &widgetContext,
74 const QgsProcessingParameterDefinition *definition = nullptr,
75 const QgsProcessingAlgorithm *algorithm = nullptr, QWidget *parent SIP_TRANSFERTHIS = nullptr );
76 QgsProcessingParameterDefinition *createParameter( const QString &name, const QString &description, QgsProcessingParameterDefinition::Flags flags ) const override;
77
78 private:
79
80 QComboBox *mParentLayerComboBox = nullptr;
81
82};
83
84
85class GUI_EXPORT QgsProcessingFieldMapWidgetWrapper : public QgsAbstractProcessingParameterWidgetWrapper, public QgsProcessingParameterWidgetFactoryInterface
86{
87 Q_OBJECT
88
89 public:
90
91 QgsProcessingFieldMapWidgetWrapper( const QgsProcessingParameterDefinition *parameter = nullptr,
92 QgsProcessingGui::WidgetType type = QgsProcessingGui::Standard, QWidget *parent = nullptr );
93
94 // QgsProcessingParameterWidgetFactoryInterface
95 QString parameterType() const override;
97
98 // QgsProcessingParameterWidgetWrapper interface
99 QWidget *createWidget() override SIP_FACTORY;
100 QgsProcessingAbstractParameterDefinitionWidget *createParameterDefinitionWidget(
101 QgsProcessingContext &context,
102 const QgsProcessingParameterWidgetContext &widgetContext,
103 const QgsProcessingParameterDefinition *definition = nullptr,
104 const QgsProcessingAlgorithm *algorithm = nullptr ) override;
105
106 void postInitialize( const QList< QgsAbstractProcessingParameterWidgetWrapper * > &wrappers ) override;
107 int stretch() const override;
108
109 public slots:
110 void setParentLayerWrapperValue( const QgsAbstractProcessingParameterWidgetWrapper *parentWrapper );
111
112 protected:
113
114 void setWidgetValue( const QVariant &value, QgsProcessingContext &context ) override;
115 QVariant widgetValue() const override;
116
117 QStringList compatibleParameterTypes() const override;
118 QStringList compatibleOutputTypes() const override;
119 QString modelerExpressionFormatString() const override;
120 const QgsVectorLayer *linkedVectorLayer() const override;
121 private:
122
123 QgsProcessingFieldMapPanelWidget *mPanel = nullptr;
124 std::unique_ptr< QgsVectorLayer > mParentLayer;
125
126 friend class TestProcessingGui;
127};
128
129
131
132#endif // QGSPROCESSINGFIELDMAPWIDGETWRAPPER_H
A widget wrapper for Processing parameter value widgets.
Abstract interface for generating an expression context.
The QgsFieldMappingModel holds mapping information for mapping from one set of QgsFields to another,...
Base class for any widget that can be shown as a inline panel.
Abstract base class for widgets which allow users to specify the properties of a Processing parameter...
Abstract base class for processing algorithms.
Contains information about the context in which a processing algorithm is executed.
WidgetType
Types of dialogs which Processing widgets can be created for.
@ Standard
Standard algorithm dialog.
Base class for the definition of processing parameters.
Contains settings which reflect the context in which a Processing parameter widget is shown,...
An interface for Processing widget wrapper factories.
Represents a vector layer which manages a vector based data sets.
std::unique_ptr< GEOSGeometry, GeosDeleter > unique_ptr
Scoped GEOS pointer.
Definition: qgsgeos.h:79
As part of the API refactoring and improvements which landed in the Processing API was substantially reworked from the x version This was done in order to allow much of the underlying Processing framework to be ported into allowing algorithms to be written in pure substantial changes are required in order to port existing x Processing algorithms for QGIS x The most significant changes are outlined not GeoAlgorithm For algorithms which operate on features one by consider subclassing the QgsProcessingFeatureBasedAlgorithm class This class allows much of the boilerplate code for looping over features from a vector layer to be bypassed and instead requires implementation of a processFeature method Ensure that your algorithm(or algorithm 's parent class) implements the new pure virtual createInstance(self) call
#define SIP_TRANSFERTHIS
Definition: qgis_sip.h:53
#define SIP_FACTORY
Definition: qgis_sip.h:76