/***************************************************************************
 *   Copyright (C) 2008 by Peter Dahlberg   *
 *   pdahlberg@gmail.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.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#ifndef SIMULSCENE_H
#define SIMULSCENE_H

#include <QGraphicsScene>

class QTimeLine;
class HomoEFieldItem;
class QGraphicsRectItem;
class QGraphicsItemGroup;
class GraphicsEllipseItem;
class QGraphicsItemAnimation;

/**
	@author Peter Dahlberg <pdahlberg@gmail.com>
*/
class SimulScene : public QGraphicsScene {
	Q_OBJECT
	public:
		enum SceneMode {HomoEFieldItemInsert, FieldItemEdit };
		enum ItemType {ResizeRectItem};
		SimulScene ( QObject* parent = 0);
		qreal getHighestZIndexVisible(); //hoechsten z-index der sichtbaren items ausgeben

		~SimulScene();
   		double getTimePerStep();
    		int getSteps();

		//! gibt die Wirkende Kraft  zur&uuml;ck (in Newton)
		/*!
			\param point der Punkt der abgepr&uuml;ft werden soll
			\param charge Die Ladung, auf die die Kraft ausge&uuml;bt wird
			\param xy x oder y-Richtung
		*/
		 double getPowerAt(QPointF point, double charge, char xy);
    QWidget* getProbeDockWidget() const;

	public slots:
		void setSceneMode(SceneMode mode);
		void startTimer();
		void deleteSelectedFieldItems();
   		void setTimePerStep(double time);
		///starte die Berechnung der teilchenbahn(en)
    		void startCalculation();
   		void setSteps(int steps);

	void setMeterPerPx ( double theValue );
	

	double getMeterPerPx() const;
	
	private slots:
		void displayResizeRects(bool move = false);
		///does the same as displayResizeRects(true)
		void moveResizeRects();
	signals:
		void sceneModeChanged(int mode);
    		void stepsChanged(int steps);
    		void timePerStepChanged(double timePerStep);
		void meterPerPxChanged(double meterPerPx);
	private:
		QTimeLine *timer;
		
		SceneMode myMode;

		///Zeit pro Step in ms
		double timePerStep;
		///anzahl der Steps
		int steps;
		///ein Pixel entspricht so viel meter
		double meterPerPx;
		HomoEFieldItem *currHomoEfieldInsertItem; //Aktuell erstelltes Item
		HomoEFieldItem *currHomoEfieldEditItem;
		QGraphicsItem *pressedResizeItem;

		GraphicsEllipseItem *ellipse1;
		QGraphicsItemAnimation *ani;
		

		//rechtecke zur groesenaenderung
		struct resizeRects {
			QGraphicsRectItem *leftTopResizeItem;
			QGraphicsRectItem *leftResizeItem;
			QGraphicsRectItem *leftBottomResizeItem;
			QGraphicsRectItem *bottomResizeItem;
			QGraphicsRectItem *rightBottomResizeItem;
			QGraphicsRectItem *rightRezizeItem;
			QGraphicsRectItem *rightTopResizeItem;
			QGraphicsRectItem *topResizeItem;
		};
		resizeRects reRects;
		void createResizeRects();

		void calculateItemResize(
			QGraphicsSceneMouseEvent *mouseEvent,
			QGraphicsRectItem *pressedRectItem,
			QRectF &currRect,
			QPointF &newPos,
			qreal minWidth,
			qreal minHeight
		);

	protected:
		void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent);
		void mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent);
		void mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent);
		void keyPressEvent ( QKeyEvent * keyEvent );
};

#endif