qgslabelsettingswidgetbase.h

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/***************************************************************************
    qgslabelsettingswidgetbase.h
    ----------------------
    begin                : December 2019
    copyright            : (C) 2019 by Nyall Dawson
    email                : nyall dot dawson 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 QGSLABELSETTINGSWIDGETBASE_H
#define QGSLABELSETTINGSWIDGETBASE_H
 
#include "qgis_gui.h"
#include "qgis_sip.h"
#include "qgsexpressioncontextgenerator.h"
#include "qgspallabeling.h"
#include "qgspanelwidget.h"
#include "qgspropertycollection.h"
#include "qgssymbolwidgetcontext.h"
 
#include <QDialog>
 
class QDialogButtonBox;
class QgsPropertyOverrideButton;

class GUI_EXPORT QgsLabelSettingsWidgetBase : public QgsPanelWidget, protected QgsExpressionContextGenerator
{
    Q_OBJECT
 
  public:
    QgsLabelSettingsWidgetBase( QWidget *parent SIP_TRANSFERTHIS = nullptr, QgsMapLayer *vl = nullptr );

    virtual void setContext( const QgsSymbolWidgetContext &context );

    QgsSymbolWidgetContext context() const;

    virtual void setGeometryType( Qgis::GeometryType type );

    QgsPropertyCollection dataDefinedProperties() const;

    void setDataDefinedProperties( const QgsPropertyCollection &dataDefinedProperties );

    virtual void updateDataDefinedProperties( QgsPropertyCollection &properties );
 
  signals:

    void changed();

    void auxiliaryFieldCreated();
 
  protected:
    QgsExpressionContext createExpressionContext() const override;

    void registerDataDefinedButton( QgsPropertyOverrideButton *button, QgsPalLayerSettings::Property key );

    QgsPropertyCollection mDataDefinedProperties;
 
  private slots:
 
    void createAuxiliaryField();
    void updateDataDefinedProperty();
 
  private:
    QPointer< QgsMapLayer > mLayer = nullptr;
 
    QgsSymbolWidgetContext mContext;
};

class GUI_EXPORT QgsLabelSettingsWidgetDialog : public QDialog
{
    Q_OBJECT
 
  public:
    QgsLabelSettingsWidgetDialog( QgsLabelSettingsWidgetBase *widget SIP_TRANSFER, QWidget *parent = nullptr );
 

    QDialogButtonBox *buttonBox();
 
  private:
    QDialogButtonBox *mButtonBox = nullptr;
};
 
#endif // QGSLABELSETTINGSWIDGETBASE_H