/*
 * © Copyright 2014 – Urheberrechtshinweis
 * Alle Rechte vorbehalten / All Rights Reserved
 *
 * Programmcode ist urheberrechtlich geschuetzt.
 * Das Urheberrecht liegt, soweit nicht ausdruecklich anders gekennzeichnet, bei Frank Ebner.
 * Keine Verwendung ohne explizite Genehmigung.
 * (vgl. § 106 ff UrhG / § 97 UrhG)
 */

#ifndef TOOLMOVEMAP_H
#define TOOLMOVEMAP_H

#include "Tool.h"
#include "../MapView2D.h"

#include <QPanGesture>

/**
 * this tool allows moving the 2D map
 * using the mouse
 */
class ToolMoveMap : public Tool {

private:

	bool mouseIsDown = false;
	Point3 startOffset;
	int sx;
	int sy;

	const std::string getName() const override {
		return "MapMove";
	}

public:

	virtual bool mousePressEvent(MapView2D* m, QMouseEvent* e) override {
		if (e->button() == Qt::MouseButton::MidButton) {
			mouseIsDown = true;
			this->sx = e->x();
			this->sy = e->y();
			this->startOffset = m->getScaler().getOffset();
			return true;
		}
		return false;
	}

	virtual bool mouseMoveEvent(MapView2D* m, QMouseEvent* e) override {
		if (!mouseIsDown) {return false;}
		m->getScaler().setOffset(startOffset);
		m->getScaler().addOffset(e->x()-sx, e->y()-sy);
		return true;
	}

	virtual bool mouseReleaseEvent(MapView2D* m, QMouseEvent* e) override {
		(void) m;
		(void) e;
		mouseIsDown = false;
		return false;
	}

    virtual bool panTriggered(MapView2D *m, QPanGesture *g) override {
        m->getScaler().addOffset(g->delta().x(), g->delta().y());
        return true;
    }

//	virtual void keyPressEvent(MapView2D* m, QKeyEvent* e) override {
//		(void) m;
//		(void) e;
//		// TODO: move on arrow keys?
//	}


};

#endif // TOOLMOVEMAP_H