/************************************************************************
 * This file has been generated automatically from                      *
 *                                                                      *
 * src/gui/qgsexpressionpreviewwidget.h                                 *
 *                                                                      *
 * Do not edit manually ! Edit header and run scripts/sipify.pl again   *
 ************************************************************************/







class QgsExpressionPreviewWidget : QWidget
{
%Docstring
QgsExpressionPreviewWidget is a widget to preview an expression result.
If the layer is set, one can browse across features to see the different outputs.

.. versionadded:: 3.14
%End

%TypeHeaderCode
#include "qgsexpressionpreviewwidget.h"
%End
  public:
    explicit QgsExpressionPreviewWidget( QWidget *parent = 0 );
%Docstring
Constructor
%End

    void setLayer( QgsVectorLayer *layer );
%Docstring
Sets the layer used in the preview
%End

    void setExpressionText( const QString &expression );
%Docstring
Sets the expression
%End

    QgsExpressionContext expressionContext() const;
%Docstring
Returns the expression context for the widget. The context is used for the expression
preview result and for populating the list of available functions and variables.

.. seealso:: :py:func:`setExpressionContext`
%End

    void setExpressionContext( const QgsExpressionContext &context );
%Docstring
Sets the expression context for the widget. The context is used for the expression
preview result and to populate the list of available functions and variables.

:param context: expression context
%End

    void setGeomCalculator( const QgsDistanceArea &da );
%Docstring
Sets geometry calculator used in distance/area calculations.
%End

    bool evalError() const;
%Docstring
Will be set to ``True`` if the current expression text reported an eval error
with the context.
%End

    bool parserError() const;
%Docstring
Will be set to ``True`` if the current expression text reports a parser error
with the context.
%End

    const QgsExpressionNode *rootNode() const;
%Docstring
Returns the root node of the expression
%End

    QList<QgsExpression::ParserError> parserErrors() const;
%Docstring
Returns the expression parser erros
%End

  signals:

    void expressionParsed( bool isValid );
%Docstring
Emitted when the user changes the expression in the widget.
Users of this widget should connect to this signal to decide if to let the user
continue.

:param isValid: Is ``True`` if the expression the user has typed is valid.
%End

    void evalErrorChanged();
%Docstring
Will be set to ``True`` if the current expression text reported an eval error
with the context.
%End

    void parserErrorChanged();
%Docstring
Will be set to ``True`` if the current expression text reported a parser error
with the context.
%End

    void toolTipChanged( const QString &toolTip );
%Docstring
Emitted whenever the tool tip changed
%End

  public slots:
    void setCurrentFeature( const QgsFeature &feature );
%Docstring
sets the current feature used
%End


};

/************************************************************************
 * This file has been generated automatically from                      *
 *                                                                      *
 * src/gui/qgsexpressionpreviewwidget.h                                 *
 *                                                                      *
 * Do not edit manually ! Edit header and run scripts/sipify.pl again   *
 ************************************************************************/