qgsmapcanvastracer.h

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/***************************************************************************
    qgsmapcanvastracer.h
    ---------------------
    begin                : January 2016
    copyright            : (C) 2016 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 QGSMAPCANVASTRACER_H
#define QGSMAPCANVASTRACER_H

#include "qgstracer.h"
#include "qgis_gui.h"

class QAction;
class QgsMapCanvas;
class QgsMessageBar;
class QgsMessageBarItem;

class GUI_EXPORT QgsMapCanvasTracer : public QgsTracer
{
    Q_OBJECT

  public:
    explicit QgsMapCanvasTracer( QgsMapCanvas *canvas, QgsMessageBar *messageBar = nullptr );
    ~QgsMapCanvasTracer() override;

    QAction *actionEnableTracing() const { return mActionEnableTracing; }

    void setActionEnableTracing( QAction *action ) { mActionEnableTracing = action; }

    QAction *actionEnableSnapping() const { return mActionEnableSnapping; }

    void setActionEnableSnapping( QAction *action ) { mActionEnableSnapping = action; }

    static QgsMapCanvasTracer *tracerForCanvas( QgsMapCanvas *canvas );

    void reportError( PathError err, bool addingVertex );

  protected:
    void configure() override;

  private slots:
    void onCurrentLayerChanged();

  private:
    QgsMapCanvas *mCanvas = nullptr;
    QgsMessageBar *mMessageBar = nullptr;
    QgsMessageBarItem *mLastMessage = nullptr;

    QAction *mActionEnableTracing = nullptr;
    QAction *mActionEnableSnapping = nullptr;

    static QHash<QgsMapCanvas *, QgsMapCanvasTracer *> sTracers;
};

#endif // QGSMAPCANVASTRACER_H