#pragma once

#include <QtWidgets/QGraphicsView>
#include <QDebug>

#include "Export.hpp"

namespace QtNodes
{

	class FlowScene;

	class FlowView
		: public QGraphicsView
	{
		Q_OBJECT
	public:

		FlowView(QWidget* parent = Q_NULLPTR);
		FlowView(FlowScene* scene, QWidget* parent = Q_NULLPTR);

		FlowView(const FlowView&) = delete;
		FlowView operator=(const FlowView&) = delete;

		QAction* clearSelectionAction() const;

		QAction* deleteSelectionAction() const;

		void setScene(FlowScene* scene);

	public Q_SLOTS:

		void scaleUp();

		void scaleDown();

		void deleteSelectedNodes();

	protected:

		void contextMenuEvent(QContextMenuEvent* event) override;

		void wheelEvent(QWheelEvent* event) override;

		void keyPressEvent(QKeyEvent* event) override;

		void keyReleaseEvent(QKeyEvent* event) override;

		void mousePressEvent(QMouseEvent* event) override;

		void mouseMoveEvent(QMouseEvent* event) override;

		void mouseReleaseEvent(QMouseEvent* event) override;

		void drawBackground(QPainter* painter, const QRectF& r) override;

		void showEvent(QShowEvent* event) override;

	protected:

		FlowScene* scene();

	private:

		QAction* _clearSelectionAction;
		QAction* _deleteSelectionAction;

		QPointF _clickPos;

		FlowScene* _scene;
	};
}