/usr/include/qgis/qgssearchwidgetwrapper.h is in libqgis-dev 2.14.11+dfsg-3+deb9u1.
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qgssearchwidgetwrapper.h
--------------------------------------
Date : 31.5.2015
Copyright : (C) 2015 Karolina Alexiou (carolinux)
Email : carolinegr at gmail dot com
***************************************************************************
* *
* 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 QGSSEARCHWIDGETWRAPPER_H
#define QGSSEARCHWIDGETWRAPPER_H
#include <QObject>
#include <QMap>
#include <QVariant>
class QgsVectorLayer;
class QgsField;
#include "qgseditorwidgetconfig.h"
#include "qgsattributeeditorcontext.h"
#include "qgswidgetwrapper.h"
/**
* Manages an editor widget
* Widget and wrapper share the same parent
*
* A wrapper controls one attribute editor widget and is able to create a default
* widget or use a pre-existent widget. It is able to set the widget to the value implied
* by a field of a vector layer, or return the value it currently holds. Every time it is changed
* it has to emit a valueChanged signal. If it fails to do so, there is no guarantee that the
* changed status of the widget will be saved.
*/
class GUI_EXPORT QgsSearchWidgetWrapper : public QgsWidgetWrapper
{
Q_OBJECT
public:
/**
* Create a new widget wrapper
*
* @param vl The layer on which the field is
* @param fieldIdx The field which will be controlled
* @param parent A parent widget for this widget wrapper and the created widget.
*/
explicit QgsSearchWidgetWrapper( QgsVectorLayer* vl, int fieldIdx, QWidget* parent = nullptr );
/**
* Will be used to access the widget's value. Read the value from the widget and
* return it properly formatted to be saved in the attribute.
*
* If an invalid variant is returned this will be interpreted as no change.
* Be sure to return a NULL QVariant if it should be set to NULL.
*
* @return The current value the widget represents
*/
virtual QString expression() = 0;
/**
* If this is true, then this search widget should take effect directly
* when its expression changes
*/
virtual bool applyDirectly() = 0;
signals:
/**
* Emitted whenever the expression changes
* @param exp The new search expression
*/
void expressionChanged( const QString& exp );
protected slots:
virtual void setExpression( QString value ) = 0;
void setFeature( const QgsFeature& feature ) override;
protected:
//! clears the expression to search for all features
void clearExpression();
QString mExpression;
int mFieldIdx;
};
// We'll use this class inside a QVariant in the widgets properties
Q_DECLARE_METATYPE( QgsSearchWidgetWrapper* )
#endif // QGSSEARCHWIDGETWRAPPER_H
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