qgshtmlwidgetwrapper.h

Go to the documentation of this file.

/***************************************************************************
  qgshtmlwidgetwrapper.h
 
 ---------------------
 begin                : 23.03.2019
 copyright            : (C) 2019 by Alessandro Pasotti
 email                : elpaso at itopen dot it
 ***************************************************************************
 *                                                                         *
 *   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 QGSHTMLWIDGETWRAPPER_H
#define QGSHTMLWIDGETWRAPPER_H
 
#include "qgis_gui.h"
#include "qgis_sip.h"
#include "qgswebview.h"
#include "qgswidgetwrapper.h"

class GUI_EXPORT QgsHtmlWidgetWrapper : public QgsWidgetWrapper
{
    Q_OBJECT
 
  public:
    QgsHtmlWidgetWrapper( QgsVectorLayer *layer, QWidget *editor, QWidget *parent );
 
    bool valid() const override;
 
    QWidget *createWidget( QWidget *parent ) override;
 
    void initWidget( QWidget *editor ) override;

    void reinitWidget();

    void setHtmlCode( const QString &htmlCode );

    bool needsGeometry() const;
 
  public slots:
    void setFeature( const QgsFeature &feature ) override;
 
  private slots:
    void setHtmlContext();
 
  private:
    void checkGeometryNeeds();
 
    QString mHtmlCode;
    QgsWebView *mWidget = nullptr;
    QgsFeature mFeature;
    bool mNeedsGeometry = false;
    QgsFeature mFormFeature;
    bool mRequiresFormScope = false;
 
    friend class TestQgsHtmlWidgetWrapper;
};
 
 
#ifndef SIP_RUN

class HtmlExpression : public QObject
{
    Q_OBJECT
 
  public:
    void setExpressionContext( const QgsExpressionContext &context );
 
  public:
    Q_INVOKABLE QString evaluate( const QString &expression ) const;
 
  private:
    QgsExpressionContext mExpressionContext;
};

class NeedsGeometryEvaluator : public QObject
{
    Q_OBJECT
 
  public:
    bool needsGeometry() const { return mNeedsGeometry; }

    void setExpressionContext( const QgsExpressionContext &context );

    Q_INVOKABLE void evaluate( const QString &expression );
 
  private:
    bool mNeedsGeometry = false;
    QgsExpressionContext mExpressionContext;
};
 

#endif //SIP_RUN
 
#endif // QGSHTMLWIDGETWRAPPER_H