qgslabelingwidget.h

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/***************************************************************************
    qgslabelingwidget.h
    ---------------------
    begin                : September 2015
    copyright            : (C) 2015 by Martin Dobias
    email                : wonder dot sk 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 QGSLABELINGWIDGET_H
#define QGSLABELINGWIDGET_H
 
// We don't want to expose this in the public API
#define SIP_NO_FILE
 
#include "ui_qgslabelingwidget.h"
 
#include "qgis_gui.h"
#include "qgsmaplayerconfigwidget.h"
#include "qgspallabeling.h"
#include "qgsvectorlayerlabeling.h"
 
#include <QWidget>
 
class QgsLabelingGui;
class QgsMapCanvas;
class QgsRuleBasedLabelingWidget;
class QgsVectorLayer;
class QgsMapLayer;
class QgsMessageBar;

class GUI_EXPORT QgsLabelingWidget : public QgsMapLayerConfigWidget, private Ui::QgsLabelingWidget
{
    Q_OBJECT
  public:
    QgsLabelingWidget( QgsVectorLayer *layer, QgsMapCanvas *canvas, QWidget *parent = nullptr, QgsMessageBar *messageBar = nullptr );

    QgsLabelingGui *labelingGui();

    static void showLabelingEngineRules( QWidget *parent, QgsMapCanvas *canvas );

    static void showEngineConfiguration( QWidget *parent, QgsMapCanvas *canvas );
 
  public slots:
    void setLayer( QgsMapLayer *layer );
    void writeSettingsToLayer();

    void apply() override;

    void adaptToLayer();

    void resetSettings();
 
  signals:
    void auxiliaryFieldCreated();
 
  private slots:
    void labelModeChanged( int index );
    void showLabelingEngineRulesPrivate();
    void showEngineConfigDialogPrivate();
 
  private:
    enum Mode
    {
      ModeNone,
      ModeSingle,
      ModeRuleBased,
      ModeBlocking
    };
 
    QgsVectorLayer *mLayer = nullptr;
    QgsMapCanvas *mCanvas = nullptr;
    QgsMessageBar *mMessageBar = nullptr;
 
    QWidget *mWidget = nullptr;
    std::unique_ptr<QgsPalLayerSettings> mSimpleSettings;
    std::unique_ptr<QgsAbstractVectorLayerLabeling> mOldSettings;
    bool mOldLabelsEnabled = false;
};
 
#endif // QGSLABELINGWIDGET_H