qgslabelinggui.h

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/***************************************************************************
  qgslabelinggui.h
  Smart labeling for vector layers
  -------------------
         begin                : June 2009
         copyright            : (C) 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 QGSLABELINGGUI_H
#define QGSLABELINGGUI_H
 
#include "qgspallabeling.h"
#include "qgstextformatwidget.h"
#include "qgspropertyoverridebutton.h"
#include "qgis_gui.h"
 
class QDialogButtonBox;
 
#define SIP_NO_FILE
 
 
class GUI_EXPORT QgsLabelingGui : public QgsTextFormatWidget
{
    Q_OBJECT
 
  public:
    QgsLabelingGui( QgsVectorLayer *layer, QgsMapCanvas *mapCanvas, const QgsPalLayerSettings &settings, QWidget *parent = nullptr,
                    QgsWkbTypes::GeometryType geomType = QgsWkbTypes::UnknownGeometry );
 
    QgsPalLayerSettings layerSettings();
 
    enum LabelMode
    {
      NoLabels,
      Labels,
      ObstaclesOnly,
    };
 
    void setLabelMode( LabelMode mode );
 
    void setLayer( QgsMapLayer *layer );
 
    void setSettings( const QgsPalLayerSettings &settings );
 
    void setContext( const QgsSymbolWidgetContext &context ) override;
 
  public slots:
 
    void updateUi();
 
  protected slots:
    void setFormatFromStyle( const QString &name, QgsStyle::StyleEntity type ) override;
    void saveFormat() override;
 
  protected:
    void blockInitSignals( bool block );
    void syncDefinedCheckboxFrame( QgsPropertyOverrideButton *ddBtn, QCheckBox *chkBx, QFrame *f );
    bool eventFilter( QObject *object, QEvent *event ) override;
 
  private slots:
 
    void updateGeometryTypeBasedWidgets();
    void showGeometryGeneratorExpressionBuilder();
    void validateGeometryGeneratorExpression();
    void determineGeometryGeneratorType();
 
    void calloutTypeChanged();
 
  private:
 
    QgsPalLayerSettings mSettings;
    LabelMode mMode;
    QgsFeature mPreviewFeature;
    QgsMapCanvas *mCanvas = nullptr;
 
    QgsLabelObstacleSettings mObstacleSettings;
    QgsLabelLineSettings mLineSettings;
 
    QgsExpressionContext createExpressionContext() const override;
 
  private slots:
 
    void initCalloutWidgets();
    void updateCalloutWidget( QgsCallout *callout );
    void showObstacleSettings();
    void showLineAnchorSettings();
 
};
 
class GUI_EXPORT QgsLabelSettingsDialog : public QDialog
{
    Q_OBJECT
 
  public:
 
    QgsLabelSettingsDialog( const QgsPalLayerSettings &settings, QgsVectorLayer *layer, QgsMapCanvas *mapCanvas, QWidget *parent SIP_TRANSFERTHIS = nullptr,
                            QgsWkbTypes::GeometryType geomType = QgsWkbTypes::UnknownGeometry );
 
    QgsPalLayerSettings settings() const { return mWidget->layerSettings(); }
 
    QDialogButtonBox *buttonBox() const;
 
  private:
 
    QgsLabelingGui *mWidget = nullptr;
    QDialogButtonBox *mButtonBox = nullptr;
 
  private slots:
    void showHelp();
 
};
 
 
#endif // QGSLABELINGGUI_H