qgsattributeform.h

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/***************************************************************************
    qgsattributeform.h
     --------------------------------------
    Date                 : 3.5.2014
    Copyright            : (C) 2014 Matthias Kuhn
    Email                : matthias at opengis dot ch
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSATTRIBUTEFORM_H
#define QGSATTRIBUTEFORM_H
 
#include "qgsfeature.h"
#include "qgis_sip.h"
#include "qgsattributeeditorcontext.h"
#include "qgseditorwidgetwrapper.h"
 
#include <QWidget>
#include <QSvgWidget>
#include <QLabel>
#include <QDialogButtonBox>
#include "qgis_gui.h"
 
 
class QgsAttributeFormInterface;
class QgsAttributeFormEditorWidget;
class QgsMessageBar;
class QgsMessageBarItem;
class QgsWidgetWrapper;
class QgsTabWidget;
class QgsAttributeFormWidget;
class QgsRelationWidgetWrapper;
 
class GUI_EXPORT QgsAttributeForm : public QWidget
{
    Q_OBJECT
 
  public:
 
    enum Mode
    {
      SingleEditMode, 
      AddFeatureMode, 
      MultiEditMode, 
      SearchMode, 
      AggregateSearchMode, 
      IdentifyMode 
    };
 
    enum FilterType
    {
      ReplaceFilter, 
      FilterAnd, 
      FilterOr, 
    };
 
    explicit QgsAttributeForm( QgsVectorLayer *vl,
                               const QgsFeature &feature = QgsFeature(),
                               const QgsAttributeEditorContext &context = QgsAttributeEditorContext(),
                               QWidget *parent SIP_TRANSFERTHIS = nullptr );
    ~QgsAttributeForm() override;
 
    const QgsFeature &feature() { return mFeature; }
 
    QgsFeature currentFormFeature() const { return mCurrentFormFeature; }
 
    void displayWarning( const QString &message );
 
    // TODO QGIS 4.0 - make private
 
    void hideButtonBox();
 
    // TODO QGIS 4.0 - make private
 
    void showButtonBox();
 
    // TODO QGIS 4.0 - make private
 
    void disconnectButtonBox();
 
    void addInterface( QgsAttributeFormInterface *iface SIP_TRANSFER );
 
    QgsVectorLayer *layer() { return mLayer; }
 
    bool editable();
 
    QgsAttributeEditorContext::Mode mode() const { return mMode; }
 
    void setMode( QgsAttributeEditorContext::Mode mode );
 
    void setEditCommandMessage( const QString &message ) { mEditCommandMessage = message; }
 
    bool eventFilter( QObject *object, QEvent *event ) override;
 
    void setMultiEditFeatureIds( const QgsFeatureIds &fids );
 
    void setMessageBar( QgsMessageBar *messageBar );
 
    QString aggregateFilter() const;
 
    void setExtraContextScope( QgsExpressionContextScope *extraScope SIP_TRANSFER );
 
  signals:
 
    Q_DECL_DEPRECATED void attributeChanged( const QString &attribute, const QVariant &value ) SIP_DEPRECATED;
 
    void widgetValueChanged( const QString &attribute, const QVariant &value, bool attributeChanged );
 
    void beforeSave( bool &ok ) SIP_SKIP;
 
    void featureSaved( const QgsFeature &feature );
 
    void filterExpressionSet( const QString &expression, QgsAttributeForm::FilterType type );
 
    void modeChanged( QgsAttributeEditorContext::Mode mode );
 
    void closed();
 
    void zoomToFeatures( const QString &filter );
 
    void flashFeatures( const QString &filter );
 
  public slots:
 
    void changeAttribute( const QString &field, const QVariant &value, const QString &hintText = QString() );
 
    void setFeature( const QgsFeature &feature );
 
    bool save();
 
    void resetValues();
 
    void resetSearch();
 
    void refreshFeature();
 
    void parentFormValueChanged( const QString &attribute, const QVariant &newValue );
 
 
  private slots:
    void onAttributeChanged( const QVariant &value, const QVariantList &additionalFieldValues );
    void onAttributeAdded( int idx );
    void onAttributeDeleted( int idx );
    void onUpdatedFields();
    void onConstraintStatusChanged( const QString &constraint,
                                    const QString &description, const QString &err, QgsEditorWidgetWrapper::ConstraintResult result );
    void preventFeatureRefresh();
    void synchronizeEnabledState();
    void layerSelectionChanged();
 
    bool saveMultiEdits();
    void resetMultiEdit( bool promptToSave = false );
    void multiEditMessageClicked( const QString &link );
 
    void filterAndTriggered();
    void filterOrTriggered();
    void filterTriggered();
 
    void searchZoomTo();
    void searchFlash();
    void searchSetSelection();
    void searchAddToSelection();
    void searchRemoveFromSelection();
    void searchIntersectSelection();
 
  private:
    void init();
 
    void cleanPython();
 
    void initPython();
 
    void updateJoinedFields( const QgsEditorWidgetWrapper &eww );
 
    bool fieldIsEditable( int fieldIndex ) const;
 
    bool fieldIsEditable( const QgsVectorLayer &layer, int fieldIndex, QgsFeatureId fid ) const;
 
    void updateDefaultValueDependencies();
 
    struct WidgetInfo
    {
      QWidget *widget = nullptr;
      QString labelText;
      QString toolTip;
      QString hint;
      bool labelOnTop = false;
      bool labelAlignRight = false;
      bool showLabel = true;
    };
 
    WidgetInfo createWidgetFromDef( const QgsAttributeEditorElement *widgetDef, QWidget *parent, QgsVectorLayer *vl, QgsAttributeEditorContext &context );
 
    void addWidgetWrapper( QgsEditorWidgetWrapper *eww );
 
    void createWrappers();
    void afterWidgetInit();
 
    void scanForEqualAttributes( QgsFeatureIterator &fit, QSet< int > &mixedValueFields, QHash< int, QVariant > &fieldSharedValues ) const;
 
    bool saveEdits();
 
    void createDefaultValueDependencies();
 
    bool updateDefaultValues( const int originIdx );
 
    int messageTimeout();
    void clearMultiEditMessages();
    void pushSelectedFeaturesMessage();
    void runSearchSelect( QgsVectorLayer::SelectBehavior behavior );
 
    QString createFilterExpression() const;
 
    QgsExpressionContext createExpressionContext( const QgsFeature &feature ) const;
 
    void updateAllConstraints();
    void updateConstraints( QgsEditorWidgetWrapper *w );
    void updateContainersVisibility();
    void updateConstraint( const QgsFeature &ft, QgsEditorWidgetWrapper *eww );
    void updateLabels();
    bool currentFormValuesFeature( QgsFeature &feature );
    bool currentFormValidConstraints( QStringList &invalidFields, QStringList &descriptions );
    QList<QgsEditorWidgetWrapper *> constraintDependencies( QgsEditorWidgetWrapper *w );
 
    QgsRelationWidgetWrapper *setupRelationWidgetWrapper( const QgsRelation &rel, const QgsAttributeEditorContext &context );
 
    QgsVectorLayer *mLayer = nullptr;
    QgsFeature mFeature;
    QgsFeature mCurrentFormFeature;
    QgsMessageBar *mMessageBar = nullptr;
    bool mOwnsMessageBar;
    QgsMessageBarItem *mMultiEditUnsavedMessageBarItem = nullptr;
    QgsMessageBarItem *mMultiEditMessageBarItem = nullptr;
    QList<QgsWidgetWrapper *> mWidgets;
    QgsAttributeEditorContext mContext;
    std::unique_ptr<QgsExpressionContextScope> mExtraContextScope;
    QDialogButtonBox *mButtonBox = nullptr;
    QWidget *mSearchButtonBox = nullptr;
    QList<QgsAttributeFormInterface *> mInterfaces;
    QMap< int, QgsAttributeFormEditorWidget * > mFormEditorWidgets;
    QList< QgsAttributeFormWidget *> mFormWidgets;
    QMap<const QgsVectorLayerJoinInfo *, QgsFeature> mJoinedFeatures;
    QMap<QLabel *, QgsProperty> mLabelDataDefinedProperties;
    bool mValuesInitialized = false;
    bool mDirty = false;
    bool mIsSettingFeature = false;
 
    struct ContainerInformation
    {
      ContainerInformation( QgsTabWidget *tabWidget, QWidget *widget, const QgsExpression &expression )
        : tabWidget( tabWidget )
        , widget( widget )
        , expression( expression )
        , isVisible( true )
      {}
 
      ContainerInformation( QWidget *widget, const QgsExpression &expression )
        : widget( widget )
        , expression( expression )
        , isVisible( true )
      {}
 
      QgsTabWidget *tabWidget = nullptr;
      QWidget *widget = nullptr;
      QgsExpression expression;
      bool isVisible;
 
      void apply( QgsExpressionContext *expressionContext );
    };
 
    void registerContainerInformation( ContainerInformation *info );
 
    void updateIcon( QgsEditorWidgetWrapper *eww );
 
    void reloadIcon( const QString &file, const QString &tooltip, QSvgWidget *sw );
 
    // Contains information about tabs and groupboxes, their visibility state visibility conditions
    QVector<ContainerInformation *> mContainerVisibilityInformation;
    QMap<QString, QVector<ContainerInformation *> > mContainerInformationDependency;
 
    // Variables below are used for Python
    static int sFormCounter;
    int mFormNr;
    QString mPyFormVarName;
 
    bool mIsSaving;
 
    bool mPreventFeatureRefresh;
 
    bool mIsSettingMultiEditFeatures;
 
    QgsFeatureIds mMultiEditFeatureIds;
    bool mUnsavedMultiEditChanges;
 
    QString mEditCommandMessage;
 
    QgsAttributeEditorContext::Mode mMode;
 
    QMap<QWidget *, QSvgWidget *> mIconMap;
 
    QMap<int, QgsWidgetWrapper *> mDefaultValueDependencies;
 
    QList<int> mAlreadyUpdatedFields;
 
    friend class TestQgsDualView;
    friend class TestQgsAttributeForm;
};
 
#endif // QGSATTRIBUTEFORM_H