qgsmapcanvasannotationitem.h

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/***************************************************************************
                              qgsmapcanvasannotationitem.h
                              ----------------------------
  begin                : January 2017
  copyright            : (C) 2017 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 QGSMAPCANVASANNOTATIONITEM_H
#define QGSMAPCANVASANNOTATIONITEM_H

#include "qgsmapcanvasitem.h"
#include "qgis_gui.h"

class QgsAnnotation;

class GUI_EXPORT QgsMapCanvasAnnotationItem: public QObject, public QgsMapCanvasItem
{
    Q_OBJECT

  public:

    enum MouseMoveAction
    {
      NoAction, 
      MoveMapPosition, 
      MoveFramePosition, 
      ResizeFrameUp, 
      ResizeFrameDown, 
      ResizeFrameLeft, 
      ResizeFrameRight, 
      ResizeFrameLeftUp, 
      ResizeFrameRightUp, 
      ResizeFrameLeftDown, 
      ResizeFrameRightDown 
    };

    QgsMapCanvasAnnotationItem( QgsAnnotation *annotation SIP_TRANSFER, QgsMapCanvas *mapCanvas SIP_TRANSFERTHIS );

    const QgsAnnotation *annotation() const { return mAnnotation; } SIP_SKIP

    QgsAnnotation *annotation() { return mAnnotation; }

    void updatePosition() override;

    QRectF boundingRect() const override;

    void paint( QPainter *painter ) override;

    MouseMoveAction moveActionForPosition( QPointF pos ) const;

    Qt::CursorShape cursorShapeForAction( MouseMoveAction moveAction ) const;

  private slots:

    void updateBoundingRect();

    void onCanvasLayersChanged();

    void setFeatureForMapPosition();

  private:

    void drawSelectionBoxes( QPainter *p ) const;

    double scaledSymbolSize() const;

    QgsAnnotation *mAnnotation = nullptr;

    QRectF mBoundingRect;

};

#endif // QGSMAPCANVASANNOTATIONITEM_H