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 "qgssymbolwidgetcontext.h"
#include "qgspallabeling.h"
#include "qgspropertycollection.h"
#include "qgspanelwidget.h"
#include "qgsexpressioncontextgenerator.h"
#include "qgis_gui.h"
#include "qgis_sip.h"

#include <QDialog>

class QgsPropertyOverrideButton;

class GUI_EXPORT QgsLabelSettingsWidgetBase : public QgsPanelWidget, protected QgsExpressionContextGenerator
{
    Q_OBJECT

  public:

    QgsLabelSettingsWidgetBase( QWidget *parent SIP_TRANSFERTHIS = nullptr, QgsVectorLayer *vl = nullptr );

    virtual void setContext( const QgsSymbolWidgetContext &context );

    QgsSymbolWidgetContext context() const;

    virtual void setGeometryType( QgsWkbTypes::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:

    QgsVectorLayer *mVectorLayer = nullptr;

    bool mBlockSignals = false;

    QgsSymbolWidgetContext mContext;


};

class GUI_EXPORT QgsLabelSettingsWidgetDialog : public QDialog
{
    Q_OBJECT

  public:


    QgsLabelSettingsWidgetDialog( QgsLabelSettingsWidgetBase *widget SIP_TRANSFER, QWidget *parent = nullptr );

};

#endif // QGSLABELSETTINGSWIDGETBASE_H