qgscalloutwidget.h

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/***************************************************************************
    qgscalloutwidget.h
    ---------------------
    begin                : July 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 QGSCALLOUTWIDGET_H
#define QGSCALLOUTWIDGET_H
 
#include "qgspropertyoverridebutton.h"
#include "qgis_sip.h"
#include "qgssymbolwidgetcontext.h"
#include "qgscallout.h"
#include <QWidget>
#include <QStandardItemModel>
 
class QgsVectorLayer;
class QgsMapCanvas;
 
class GUI_EXPORT QgsCalloutWidget : public QWidget, protected QgsExpressionContextGenerator
{
    Q_OBJECT
 
  public:
 
    QgsCalloutWidget( QWidget *parent SIP_TRANSFERTHIS, QgsVectorLayer *vl = nullptr )
      : QWidget( parent )
      , mVectorLayer( vl )
    {}
 
    virtual void setCallout( QgsCallout *callout ) = 0;
 
    virtual QgsCallout *callout() = 0;
 
    virtual void setContext( const QgsSymbolWidgetContext &context );
 
    QgsSymbolWidgetContext context() const;
 
    const QgsVectorLayer *vectorLayer() const { return mVectorLayer; }
 
    virtual void setGeometryType( QgsWkbTypes::GeometryType type ) = 0;
 
  protected:
 
    void registerDataDefinedButton( QgsPropertyOverrideButton *button, QgsCallout::Property key );
 
    QgsExpressionContext createExpressionContext() const override;
 
  private:
    QgsVectorLayer *mVectorLayer = nullptr;
 
    QgsMapCanvas *mMapCanvas = nullptr;
 
  signals:
 
    void changed();
 
  private slots:
    void updateDataDefinedProperty();
 
    void createAuxiliaryField();
 
  private:
    QgsSymbolWidgetContext mContext;
};
 
 
 
#include "ui_widget_simplelinecallout.h"
 
class QgsSimpleLineCallout;
 
#ifndef SIP_RUN
 
class GUI_EXPORT QgsSimpleLineCalloutWidget : public QgsCalloutWidget, private Ui::WidgetSimpleLineCallout
{
    Q_OBJECT
 
  public:
 
    QgsSimpleLineCalloutWidget( QgsVectorLayer *vl, QWidget *parent SIP_TRANSFERTHIS = nullptr );
 
    static QgsCalloutWidget *create( QgsVectorLayer *vl ) SIP_FACTORY { return new QgsSimpleLineCalloutWidget( vl ); }
 
    void setCallout( QgsCallout *callout ) override;
 
    QgsCallout *callout() override;
 
    void setGeometryType( QgsWkbTypes::GeometryType type ) override;
 
  private slots:
 
    void minimumLengthChanged();
    void minimumLengthUnitWidgetChanged();
    void offsetFromAnchorUnitWidgetChanged();
    void offsetFromAnchorChanged();
    void offsetFromLabelUnitWidgetChanged();
    void offsetFromLabelChanged();
    void lineSymbolChanged();
    void mAnchorPointComboBox_currentIndexChanged( int index );
    void mLabelAnchorPointComboBox_currentIndexChanged( int index );
    void drawToAllPartsToggled( bool active );
 
  private:
    std::unique_ptr< QgsSimpleLineCallout > mCallout;
 
};
 
class GUI_EXPORT QgsManhattanLineCalloutWidget : public QgsSimpleLineCalloutWidget
{
    Q_OBJECT
 
  public:
 
    QgsManhattanLineCalloutWidget( QgsVectorLayer *vl, QWidget *parent SIP_TRANSFERTHIS = nullptr );
 
    static QgsCalloutWidget *create( QgsVectorLayer *vl ) SIP_FACTORY { return new QgsManhattanLineCalloutWidget( vl ); }
 
};
 
#endif
 
#endif // QGSCALLOUTWIDGET_H