/***************************************************************************
 *   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.             *
 ***************************************************************************/
#include "constants.h"
#include "simulscene.h"
#include <QGraphicsRectItem>
#include <QTimeLine>
#include <QGraphicsItemAnimation>
#include <cmath>
#include "graphicsellipseitem.h"
#include "homoefielditem.h"
#include "homobfielditem.h"
#include "stopperitem.h"
#include <QRectF>
#include <QGraphicsSceneMouseEvent>
#include <QtDebug>
#include <QApplication>
#include <QGraphicsRectItem>
#include <QKeyEvent>
#include <QGraphicsItemGroup>
#include <QPainterPath>
#include <QGraphicsPathItem>
#include <QListWidget>
#include <QPainter>


SimulScene::SimulScene ( QObject* parent ) : QGraphicsScene ( parent ) {

	fieldListWidget = new QListWidget();

	currHomoEfieldInsertItem = 0;
	currHomoEfieldEditItem = 0;
	currHomoBfieldInsertItem = 0;
	currHomoBfieldEditItem = 0;
	currStopperInsertItem = 0;
	currStopperEditItem = 0;
	ChargePlacementInProgress = false;

	createResizeRects();
	
	//path Item Erstellen
	pathItem1 = addPath(QPainterPath(), QPen(QColor(255,137,11), 1, Qt::SolidLine));
	pathItem1->setZValue(100);
	//pathItem1->setCacheMode(QGraphicsItem::DeviceCoordinateCache);

	setFlightPathVisible();

	/*addLine(0,-298,0,298,QPen(Qt::green, 1, Qt::SolidLine) )->setCacheMode(QGraphicsItem::DeviceCoordinateCache);
	addLine(-398,0,398,0,QPen(Qt::green, 1, Qt::SolidLine) )->setCacheMode(QGraphicsItem::DeviceCoordinateCache);
	
	for (int i = -39; i< 39; ++i) {
		if(i!=0) { 
			QGraphicsLineItem *line = addLine(i*10,-298,i*10,298,QPen(Qt::lightGray, 1, Qt::DotLine) );
			line->setCacheMode(QGraphicsItem::DeviceCoordinateCache);
			line->setZValue(-1);
		}
	} 
	for (int i = -29; i< 29; ++i) {
		if(i!=0) {
			QGraphicsLineItem *line = addLine(-398,i*10,398,i*10,QPen(Qt::lightGray, 1, Qt::DotLine) );
			line ->setCacheMode(QGraphicsItem::DeviceCoordinateCache);
			line->setZValue(-1);
		}
	}*/

	ellipse1 = new GraphicsEllipseItem();
	ellipse1->setRect(-2,-2,5,5);
	ellipse1->setPen(Qt::NoPen);
	ellipse1->setBrush(Qt::red);
	ellipse1->setZValue(200);
	//ellipse1->scale(0.25,0.25);
	connect(this,SIGNAL(changed(QList<QRectF>)),ellipse1,SLOT(handleSceneChange(QList<QRectF>)));


	addItem(ellipse1);	
	
	timer = new QTimeLine(1);
	timer->setCurveShape(QTimeLine::LinearCurve);
	//timer->toggleDirection();
	ani = new QGraphicsItemAnimation();
	ani->setItem(ellipse1);
	ani->setTimeLine(timer);

	connect( timer, SIGNAL(finished()), this, SIGNAL(timeLineInRunningState()) );

	setupVars();

}

void SimulScene::drawBackground ( QPainter * painter, const QRectF & rect ) {
	QGraphicsScene::drawBackground(painter,rect);
}


void SimulScene::setupVars() {
	//variablen initialisieren
	setTimePerStep(1e-10);
	setSteps(300000);
	//setMeterPerPx(1/1000.0);
	setMeterPerPx(0.01);
	setPxPerSec(90.0);

	timer->setFrameRange(0,100);
	//timer->setUpdateInterval(30);
	timer->setCurveShape(QTimeLine::LinearCurve);
	
	setTimeLineDuration(30000);
	setFlightPathVisible(true);

	
}

void SimulScene::startTimer() {

	timer->setCurrentTime(0);
	timer->start();
}
void SimulScene::stopTimer() {
	timer->setCurrentTime(0);
	timer->stop();
	emit timeLineInRunningState(false);
}


void SimulScene::pauseTimer(bool yesno) {
	if (yesno) timer->stop();
	else timer->start();
}

void SimulScene::startPauseTimer(bool yesno) {
	pauseTimer(!yesno);
}

void SimulScene::mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent) {
	switch(myMode) {
		case HomoEFieldItemInsert:
			if (mouseEvent->button() != Qt::LeftButton) break; //benutze nur linke maustaste
			currHomoEfieldInsertItem = new HomoEFieldItem(QRectF(mouseEvent->scenePos(),mouseEvent->scenePos()));
			currHomoEfieldInsertItem->setZValue(getHighestZIndexFieldItems() + FieldZStep); //zValue setzen
			addItem(currHomoEfieldInsertItem);
			QApplication::setOverrideCursor(QCursor(Qt::SizeFDiagCursor));
			break;
		case StopperItemInsert:
			if (mouseEvent->button() != Qt::LeftButton) break; //benutze nur linke maustaste
			currStopperInsertItem = new StopperItem(mouseEvent->scenePos() ,mouseEvent->scenePos());
			currStopperInsertItem->setZValue(getHighestZIndexFieldItems() + FieldZStep); //zValue setzen
			addItem(currStopperInsertItem);
			QApplication::setOverrideCursor(QCursor(Qt::SizeHorCursor));
			break;
		case HomoBFieldItemInsert:
			if (mouseEvent->button() != Qt::LeftButton) break; //benutze nur linke maustaste
			currHomoBfieldInsertItem = new HomoBFieldItem(QRectF(mouseEvent->scenePos(),mouseEvent->scenePos()));
			currHomoBfieldInsertItem->setZValue(getHighestZIndexFieldItems()+FieldZStep);  //zValue setzen
			addItem(currHomoBfieldInsertItem);
			QApplication::setOverrideCursor(QCursor(Qt::SizeFDiagCursor));
			break;
		case ProbeChargeItemPlace:
			if (mouseEvent->button() != Qt::LeftButton) break; //benutze nur linke maustaste
			clearSelection();
			ChargePlacementInProgress = true;
			ellipse1->setPos(mouseEvent->scenePos());
			break;
		default:			
			if (itemAt(mouseEvent->scenePos())->data(0) == ResizeRectItem && mouseEvent->button()==Qt::LeftButton) {
				pressedResizeItem = itemAt(mouseEvent->scenePos());
				if (selectedItems().first()->type() == HomoEFieldItem::Type) {
					currHomoEfieldEditItem = qgraphicsitem_cast<HomoEFieldItem *>(selectedItems().first());
					QApplication::setOverrideCursor(pressedResizeItem->cursor());
				}
				else if (selectedItems().first()->type() == HomoBFieldItem::Type) {
					currHomoBfieldEditItem = qgraphicsitem_cast<HomoBFieldItem *>(selectedItems().first());
					QApplication::setOverrideCursor(pressedResizeItem->cursor());
				}
				else if (selectedItems().first()->type() == StopperItem::Type) {
					currStopperEditItem = qgraphicsitem_cast<StopperItem *>(selectedItems().first());
					QApplication::setOverrideCursor(pressedResizeItem->cursor());
				}
				
			}
			else {
				QGraphicsScene::mousePressEvent(mouseEvent);
			}
	}

	
}

void SimulScene::mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent) {
	if (currHomoEfieldInsertItem != 0) {
		if (myMode == HomoEFieldItemInsert) {
			QPointF point(currHomoEfieldInsertItem->getRectF().x(), currHomoEfieldInsertItem->getRectF().y());
			update(currHomoEfieldInsertItem->getRectF());
			if(point.x() <= mouseEvent->scenePos().x() && point.y() <= mouseEvent->scenePos().y()) {
				QRectF rect(point,mouseEvent->scenePos());
				currHomoEfieldInsertItem->setRectF(rect);
				//update(QRectF(point,mouseEvent->lastScenePos()));
				
			}

		}
	}
	if (currStopperInsertItem != 0) {
		if (myMode == StopperItemInsert) {
			QPointF point(currStopperInsertItem->getRectF().x(), currStopperInsertItem->getRectF().y());
			update(currStopperInsertItem->getRectF());
			if(point.x() <= mouseEvent->scenePos().x() && point.y() <= mouseEvent->scenePos().y()) {
				currStopperInsertItem->setLine(QLineF(point, QPointF(mouseEvent->scenePos().x(),point.y() )));
				
			}

		}
	}
	else if (currHomoBfieldInsertItem != 0) {
		if (myMode == HomoBFieldItemInsert) {
			QPointF point(currHomoBfieldInsertItem->getRectF().x(), currHomoBfieldInsertItem->getRectF().y());
			update(currHomoBfieldInsertItem->getRectF());
			if(point.x() <= mouseEvent->scenePos().x() && point.y() <= mouseEvent->scenePos().y()) {
				QRectF rect(point,mouseEvent->scenePos());
				currHomoBfieldInsertItem->setRectF(rect);
				//update(QRectF(point,mouseEvent->lastScenePos()));
				
			}

		}
	}
	else if (currHomoEfieldEditItem != 0 ) {

		QGraphicsRectItem *pressedRectItem = qgraphicsitem_cast<QGraphicsRectItem *>(pressedResizeItem);
		QRectF currRect = currHomoEfieldEditItem->getRectF();
		QPointF newPos = currHomoEfieldEditItem->pos();

		calculateItemResize(mouseEvent,pressedRectItem,currRect,newPos,HomoEFieldItem::MinimumWidth,HomoEFieldItem::MinimumHeight);

		//aenderungen uebernehmen
		currHomoEfieldEditItem->setPos(newPos);
		if (currRect !=  currHomoEfieldEditItem->getRectF()) {
			currHomoEfieldEditItem->setRectF(currRect);
		}
		//resize rechtecke mitverschieben --> macht jetzt schon das Widget
		//if(mouseEvent->scenePos() != mouseEvent->lastScenePos()) displayResizeRects(true);

	}
	else if (currHomoBfieldEditItem != 0 ) {

		QGraphicsRectItem *pressedRectItem = qgraphicsitem_cast<QGraphicsRectItem *>(pressedResizeItem);
		QRectF currRect = currHomoBfieldEditItem->getRectF();
		QPointF newPos = currHomoBfieldEditItem->pos();

		calculateItemResize(mouseEvent,pressedRectItem,currRect,newPos,HomoBFieldItem::MinimumWidth,HomoBFieldItem::MinimumHeight);

		//aenderungen uebernehmen
		currHomoBfieldEditItem->setPos(newPos);
		if (currRect !=  currHomoBfieldEditItem->getRectF()) {
			currHomoBfieldEditItem->setRectF(currRect);
		}
		//resize rechtecke mitverschieben --> macht jetzt schon das Widget
		//if(mouseEvent->scenePos() != mouseEvent->lastScenePos()) displayResizeRects(true);

	}
	else if (currStopperEditItem != 0 ) {

		QGraphicsRectItem *pressedRectItem = qgraphicsitem_cast<QGraphicsRectItem *>(pressedResizeItem);
		QRectF currRect = currStopperEditItem->getRectF();
		QPointF pos = currStopperEditItem->pos();

		//calculateItemResize(mouseEvent,pressedRectItem,currRect,newPos,StopperItem::MinimumWidth,StopperItem::Height);
		qreal mouseDistanceX = mouseEvent->scenePos().x() - mouseEvent->lastScenePos().x();


		//aenderungen uebernehmen
		if (
			pressedResizeItem ==  reRects.rightRezizeItem ||
			pressedResizeItem ==  reRects.rightTopResizeItem ||
			pressedResizeItem ==  reRects.rightBottomResizeItem
		   ) {
			QPointF newPos = QPointF(pos.x()+currRect.width()+mouseDistanceX , pos.y());
			if (newPos.x() - pos.x() >= StopperItem::MinimumWidth) {
				currRect.adjust(0,0, (mouseDistanceX),0);
				currStopperEditItem->setRectF(currRect);
				
				//currStopperEditItem->setLine(QLineF(pos, newPos ));
			}
		} else if (
			pressedResizeItem ==  reRects.leftResizeItem ||
			pressedResizeItem ==  reRects.leftTopResizeItem ||
			pressedResizeItem ==  reRects.leftBottomResizeItem
		   ) {
			if ( pos.x() - pos.x()+currRect.width()-mouseDistanceX >= StopperItem::MinimumWidth) {
				currRect.adjust(0,0,-mouseDistanceX,0);
				currStopperEditItem->setPos(pos.x()+mouseDistanceX,pos.y());
				currStopperEditItem->setRectF(currRect);
				
				//currStopperEditItem->setLine(QLineF(pos, newPos ));
			}

		}
		//resize rechtecke mitverschieben --> macht jetzt schon das Widget
		//if(mouseEvent->scenePos() != mouseEvent->lastScenePos()) displayResizeRects(true);

	}
	else if (ChargePlacementInProgress) {
		if (myMode == ProbeChargeItemPlace) {
			ellipse1->setPos(mouseEvent->scenePos());
		}
	}
	else {
		QGraphicsScene::mouseMoveEvent(mouseEvent);
		if (mouseEvent->buttons() == Qt::LeftButton)
			if(mouseEvent->scenePos() != mouseEvent->lastScenePos())
				displayResizeRects(true);
	}
}

void SimulScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent) {
	if (currHomoEfieldInsertItem != 0 && myMode == HomoEFieldItemInsert) {
		if (currHomoEfieldInsertItem->getRectF().width() < HomoEFieldItem::MinimumWidth || currHomoEfieldInsertItem->getRectF().height() <HomoEFieldItem::MinimumHeight ) {
			//removeItem(currHomoEfieldInsertItem); //segmention fault in kombination mit delete?
			delete currHomoEfieldInsertItem; //zu kleines feld loeschen
		}
		else { 
			//setze Startpunkt des rechtecks auf 0,0, damit pos() richtig funktioniert
			currHomoEfieldInsertItem->setVisible(false); //ausblenden, damit sich nix verschiebt
			QRectF rect (currHomoEfieldInsertItem->getRectF());
			QPointF posPoint(rect.x(),rect.y());
			rect.setWidth(rect.width() - rect.x());
			rect.setHeight(rect.height() - rect.y());
			rect.setX(0);
			rect.setY(0);
			currHomoEfieldInsertItem->setRectF(rect);
			currHomoEfieldInsertItem->setPos(posPoint);
			currHomoEfieldInsertItem->setVisible(true); //und wieder einblenden
			

			setSceneMode(FieldItemEdit);
			//das neue item auswaehlen	
			clearSelection();
			currHomoEfieldInsertItem->setSelected(true);
			
			//die resize items aus und einblenden bei rotation
			connect( currHomoEfieldInsertItem, SIGNAL(rotationChanged()), this, SLOT(displayResizeRects()));
			//bei groesenanderung und verschieben resizerects mitverschieben
			connect( currHomoEfieldInsertItem, SIGNAL(heightChanged(double)), this, SLOT(moveResizeRects()));
			connect( currHomoEfieldInsertItem, SIGNAL(widthChanged(double)), this, SLOT(moveResizeRects()));
			connect( currHomoEfieldInsertItem, SIGNAL(ScenePosChanged(QPointF)), this, SLOT(moveResizeRects()));
			//item ueber sceneChange informieren
			connect(this,SIGNAL(changed(QList<QRectF>)),currHomoEfieldInsertItem,SLOT(handleSceneChange(QList<QRectF>)));

		}
		update(); //moegliche darstellungsprobleme beseitigen
		QApplication::restoreOverrideCursor();
	}
	else if (currHomoBfieldInsertItem != 0 && myMode == HomoBFieldItemInsert) {
		if (currHomoBfieldInsertItem->getRectF().width() < HomoBFieldItem::MinimumWidth || currHomoBfieldInsertItem->getRectF().height() <HomoBFieldItem::MinimumHeight ) {
			//removeItem(currHomoEfieldInsertItem); //segmention fault in kombination mit delete?
			delete currHomoBfieldInsertItem; //zu kleines feld loeschen
		}
		else { 
			//setze Startpunkt des rechtecks auf 0,0, damit pos() richtig funktioniert
			currHomoBfieldInsertItem->setVisible(false); //ausblenden, damit sich nix verschiebt
			QRectF rect (currHomoBfieldInsertItem->getRectF());
			QPointF posPoint(rect.x(),rect.y());
			rect.setWidth(rect.width() - rect.x());
			rect.setHeight(rect.height() - rect.y());
			rect.setX(0);
			rect.setY(0);
			currHomoBfieldInsertItem->setRectF(rect);
			currHomoBfieldInsertItem->setPos(posPoint);
			currHomoBfieldInsertItem->setVisible(true); //und wieder einblenden
			

			setSceneMode(FieldItemEdit);
			//das neue item auswaehlen	
			clearSelection();
			currHomoBfieldInsertItem->setSelected(true);
			
			//die resize items aus und einblenden bei rotation
			connect( currHomoBfieldInsertItem, SIGNAL(rotationChanged()), this, SLOT(displayResizeRects()));
			//bei groesenanderung und verschieben resizerects mitverschieben
			connect( currHomoBfieldInsertItem, SIGNAL(heightChanged(double)), this, SLOT(moveResizeRects()));
			connect( currHomoBfieldInsertItem, SIGNAL(widthChanged(double)), this, SLOT(moveResizeRects()));
			connect( currHomoBfieldInsertItem, SIGNAL(ScenePosChanged(QPointF)), this, SLOT(moveResizeRects()));
			//item ueber sceneChange informieren
			connect(this,SIGNAL(changed(QList<QRectF>)),currHomoBfieldInsertItem,SLOT(handleSceneChange(QList<QRectF>)));
		}
		update(); //moegliche darstellungsprobleme beseitigen
		QApplication::restoreOverrideCursor();
	} 
	else if (currStopperInsertItem != 0 && myMode == StopperItemInsert) {
		if (currStopperInsertItem->getRectF().width() < StopperItem::MinimumWidth) {
			//removeItem(currHomoEfieldInsertItem); //segmention fault in kombination mit delete?
			delete currStopperInsertItem; //zu kleines feld loeschen
		} else { 
			//setze Startpunkt des rechtecks auf 0,0, damit pos() richtig funktioniert
			currStopperInsertItem->setVisible(false); //ausblenden, damit sich nix verschiebt
			QRectF rect (currStopperInsertItem->getRectF());
			QPointF posPoint(rect.x(),rect.y());
			rect.setWidth(rect.width() - rect.x());
			rect.setHeight(rect.height() - rect.y());
			rect.setX(0);
			rect.setY(0);
			currStopperInsertItem->setRectF(rect);
			currStopperInsertItem->setPos(posPoint);
			currStopperInsertItem->setVisible(true); //und wieder einblenden
			

			setSceneMode(FieldItemEdit);
			//das neue item auswaehlen	
			clearSelection();
			currStopperInsertItem->setSelected(true);
			
			//die resize items aus und einblenden bei rotation
			connect( currStopperInsertItem, SIGNAL(rotationChanged()), this, SLOT(displayResizeRects()));
			//bei groesenanderung und verschieben resizerects mitverschieben
			connect( currStopperInsertItem, SIGNAL(heightChanged(double)), this, SLOT(moveResizeRects()));
			connect( currStopperInsertItem, SIGNAL(widthChanged(double)), this, SLOT(moveResizeRects()));
			connect( currStopperInsertItem, SIGNAL(ScenePosChanged(QPointF)), this, SLOT(moveResizeRects()));
			//item ueber sceneChange informieren
			connect(this,SIGNAL(changed(QList<QRectF>)),currStopperInsertItem,SLOT(handleSceneChange(QList<QRectF>)));
		}
		update(); //moegliche darstellungsprobleme beseitigen
		QApplication::restoreOverrideCursor();
	}
	else if (currHomoEfieldEditItem != 0) {
		update();
		QApplication::restoreOverrideCursor();
	}
	else if (currHomoBfieldEditItem != 0) {
		update();
		QApplication::restoreOverrideCursor();
	}
	else if (currStopperEditItem != 0) {
		update();
		QApplication::restoreOverrideCursor();
	}
	else if (ChargePlacementInProgress) {
		ChargePlacementInProgress = false;
		setSceneMode(FieldItemEdit);
	}
	pressedResizeItem = 0;
	currHomoEfieldInsertItem = 0;
	currHomoBfieldInsertItem = 0;
	currHomoEfieldEditItem = 0;
	currHomoBfieldEditItem = 0;
	currStopperInsertItem = 0;
	currStopperEditItem = 0;

	QGraphicsScene::mouseReleaseEvent(mouseEvent);
}

void SimulScene::keyPressEvent (QKeyEvent *keyevent) {
	if(keyevent->matches(QKeySequence::Delete)) {
		deleteSelectedFieldItems();
	}
}

void SimulScene::setSceneMode(SceneMode mode) {
	if(myMode==mode) return;
	myMode = mode;
	emit sceneModeChanged(mode);
}

void SimulScene::createResizeRects() {
	const QRectF resizeRectSize(0,0,7,7);

	reRects.leftTopResizeItem = new QGraphicsRectItem(resizeRectSize);
	reRects.leftTopResizeItem->setCursor(Qt::SizeFDiagCursor);
	reRects.leftTopResizeItem->setBrush(Qt::black);
	reRects.leftTopResizeItem->setVisible(false);
	reRects.leftTopResizeItem->setData(0, QVariant(ResizeRectItem)); //typ des items setzen

	reRects.leftResizeItem = new QGraphicsRectItem(resizeRectSize);
	reRects.leftResizeItem->setCursor(Qt::SizeHorCursor);
	reRects.leftResizeItem->setBrush(Qt::black);
	reRects.leftResizeItem->setVisible(false);
	reRects.leftResizeItem->setData(0, QVariant(ResizeRectItem));

	reRects.leftBottomResizeItem = new QGraphicsRectItem(resizeRectSize);
	reRects.leftBottomResizeItem->setCursor(Qt::SizeBDiagCursor);
	reRects.leftBottomResizeItem->setBrush(Qt::black);
	reRects.leftBottomResizeItem->setVisible(false);
	reRects.leftBottomResizeItem->setData(0, QVariant(ResizeRectItem));

	reRects.bottomResizeItem = new QGraphicsRectItem(resizeRectSize);
	reRects.bottomResizeItem->setCursor(Qt::SizeVerCursor);
	reRects.bottomResizeItem->setBrush(Qt::black);
	reRects.bottomResizeItem->setVisible(false);
	reRects.bottomResizeItem->setData(0, QVariant(ResizeRectItem));

	reRects.rightBottomResizeItem = new QGraphicsRectItem(resizeRectSize);
	reRects.rightBottomResizeItem->setCursor(Qt::SizeFDiagCursor);
	reRects.rightBottomResizeItem->setBrush(Qt::black);
	reRects.rightBottomResizeItem->setVisible(false);
	reRects.rightBottomResizeItem->setData(0, QVariant(ResizeRectItem));

	reRects.rightRezizeItem = new QGraphicsRectItem(resizeRectSize);
	reRects.rightRezizeItem->setCursor(Qt::SizeHorCursor);
	reRects.rightRezizeItem->setBrush(Qt::black);
	reRects.rightRezizeItem->setVisible(false);
	reRects.rightRezizeItem->setData(0, QVariant(ResizeRectItem));

	reRects.rightTopResizeItem = new QGraphicsRectItem(resizeRectSize);
	reRects.rightTopResizeItem->setCursor(Qt::SizeBDiagCursor);
	reRects.rightTopResizeItem->setBrush(Qt::black);
	reRects.rightTopResizeItem->setVisible(false);
	reRects.rightTopResizeItem->setData(0, QVariant(ResizeRectItem));

	reRects.topResizeItem = new QGraphicsRectItem(resizeRectSize);
	reRects.topResizeItem->setCursor(Qt::SizeVerCursor);
	reRects.topResizeItem->setBrush(Qt::black);
	reRects.topResizeItem->setVisible(false);
	reRects.topResizeItem->setData(0, QVariant(ResizeRectItem));

	addItem(reRects.leftTopResizeItem);
	addItem(reRects.leftResizeItem);
	addItem(reRects.leftBottomResizeItem);
	addItem(reRects.bottomResizeItem);
	addItem(reRects.rightBottomResizeItem);
	addItem(reRects.rightRezizeItem);
	addItem(reRects.rightTopResizeItem);
	addItem(reRects.topResizeItem);


	connect( this, SIGNAL(selectionChanged()), this, SLOT(displayResizeRects()) );	
}

void SimulScene::displayResizeRects(bool move) {
	if (
		selectedItems().count() == 1 &&
		FieldItem::isFieldItem(selectedItems().first()) &&
		!selectedItems().first()->transform().isTranslating() //bei rotation nicht anzeigen
	) {

		const qreal oSPACE = 3; //Aussenabstand

		//position des ausgewaehlten items
		QPointF seletedPos = selectedItems().first()->pos();
		qreal selPosX = seletedPos.x();
		qreal selPosY = seletedPos.y();

		

		//an die richtige stelle schieben
		reRects.leftTopResizeItem->setPos(selPosX - reRects.leftTopResizeItem->rect().width()- oSPACE,
					selPosY - reRects.leftTopResizeItem->rect().height() - oSPACE);

		reRects.leftResizeItem->setPos(selPosX - reRects.leftResizeItem->rect().width()- oSPACE,
					selPosY + 
					selectedItems().first()->boundingRect().height() / 2.0 -
					reRects.leftResizeItem->rect().height() /2.0);
		reRects.leftBottomResizeItem->setPos(selPosX - reRects.leftBottomResizeItem->rect().width()- oSPACE,
					selPosY + selectedItems().first()->boundingRect().height() + oSPACE);

		reRects.bottomResizeItem->setPos(selPosX +
					selectedItems().first()->boundingRect().width() / 2.0 -
					reRects.bottomResizeItem->rect().width() /2.0,
					selPosY + selectedItems().first()->boundingRect().height() + oSPACE);
		reRects.rightBottomResizeItem->setPos(selPosX + selectedItems().first()->boundingRect().width() + oSPACE,
					selPosY + selectedItems().first()->boundingRect().height() + oSPACE);
		reRects.rightRezizeItem->setPos(selPosX + selectedItems().first()->boundingRect().width() + oSPACE,
					selPosY + 
					selectedItems().first()->boundingRect().height() / 2.0 -
					reRects.rightRezizeItem->rect().height() /2.0);
		reRects.rightTopResizeItem->setPos(selPosX + selectedItems().first()->boundingRect().width() + oSPACE,
					selPosY - reRects.rightTopResizeItem->rect().height() - oSPACE);
		reRects.topResizeItem->setPos(selPosX +
					selectedItems().first()->boundingRect().width() / 2.0 -
					reRects.topResizeItem->rect().width() /2.0,
					selPosY - reRects.leftTopResizeItem->rect().height() - oSPACE);
		

		if (!move) { //im verschiebemodus kann man von diesen dingen ausgehen
			//nach oben bringen
			qreal newZValue = getHighestZIndexVisible() + 0.000001;
			reRects.leftTopResizeItem->setZValue(newZValue);
			reRects.leftResizeItem->setZValue(newZValue);
			reRects.leftBottomResizeItem->setZValue(newZValue);
			reRects.bottomResizeItem->setZValue(newZValue);
			reRects.rightBottomResizeItem->setZValue(newZValue);
			reRects.rightRezizeItem->setZValue(newZValue);
			reRects.rightTopResizeItem->setZValue(newZValue);
			reRects.topResizeItem->setZValue(newZValue);

			//sichtbar machen
			reRects.leftTopResizeItem->setVisible(true);
			reRects.leftResizeItem->setVisible(true);
			reRects.leftBottomResizeItem->setVisible(true);
			reRects.bottomResizeItem->setVisible(true);
			reRects.rightBottomResizeItem->setVisible(true);
			reRects.rightRezizeItem->setVisible(true);
			reRects.rightTopResizeItem->setVisible(true);
			reRects.topResizeItem->setVisible(true);
		}		
	}
	else if(!move && reRects.leftTopResizeItem->isVisible()) {
		//unsichtbar machen
		reRects.leftTopResizeItem->setVisible(false);
		reRects.leftResizeItem->setVisible(false);
		reRects.leftBottomResizeItem->setVisible(false);
		reRects.bottomResizeItem->setVisible(false);
		reRects.rightBottomResizeItem->setVisible(false);
		reRects.rightRezizeItem->setVisible(false);
		reRects.rightTopResizeItem->setVisible(false);
		reRects.topResizeItem->setVisible(false);
	}
}

void SimulScene::moveResizeRects() {
	displayResizeRects(true);
}

qreal SimulScene::getHighestZIndexVisible() {
	bool highestZValueSet = false;
	qreal highestZValue = 0;
	for (int i = 0; i < items().count() ; ++i ) {
		if (items().at(i)->isVisible()) {
			if (!highestZValueSet) {
				highestZValue = items().at(i)->zValue();
				highestZValueSet = true;
			}
			else if (highestZValue < items().at(i)->zValue()) {
				highestZValue = items().at(i)->zValue();
			}
		}
	}
	return highestZValue;
}
qreal SimulScene::getHighestZIndexFieldItems() {
	bool highestZValueSet = false;
	qreal highestZValue = FieldDefaultZValue; //default value
	for (int i = 0; i < items().count() ; ++i ) {
		if (FieldItem::isFieldItem(items().at(i))) {
			if (!highestZValueSet) {
				highestZValue = items().at(i)->zValue();
				highestZValueSet = true;
			}
			else if (highestZValue < items().at(i)->zValue()) {
				highestZValue = items().at(i)->zValue();
			}
		}
	}
	return highestZValue;
}

qreal SimulScene::getLowestZIndexFieldItems() {
	bool lowestZValueSet = false;
	qreal lowestZValue = FieldDefaultZValue; //default value
	for (int i = 0; i < items().count() ; ++i ) {
		if (FieldItem::isFieldItem(items().at(i))) {
			if (!lowestZValueSet) {
				lowestZValue = items().at(i)->zValue();
				lowestZValueSet = true;
			}
			else if (lowestZValue > items().at(i)->zValue()) {
				lowestZValue = items().at(i)->zValue();
			}
		}
	}
	return lowestZValue;
}

void SimulScene::deleteSelectedFieldItems() {
	QList<QGraphicsItem *> currSelectedItems = selectedItems();
	for (int i = 0; i < currSelectedItems.count() ; ++i ) {
		if (FieldItem::isFieldItem(currSelectedItems.at(i))) {
			delete currSelectedItems.at(i);
		}
	}
}


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

	qreal mouseDistanceX = mouseEvent->scenePos().x() - mouseEvent->lastScenePos().x();
	qreal mouseDistanceY = mouseEvent->scenePos().y() - mouseEvent->lastScenePos().y();

	if (reRects.rightRezizeItem == pressedRectItem) {
		currRect.adjust(0,0,mouseDistanceX , 0);
	}
	else if (reRects.leftResizeItem == pressedRectItem) {
		newPos = QPointF(newPos.x()+mouseDistanceX,newPos.y());
		currRect.adjust(0,0,-mouseDistanceX , 0);
	}
	else if (reRects.topResizeItem == pressedRectItem) {
		newPos = QPointF(newPos.x(),newPos.y()+mouseDistanceY);
		currRect.adjust(0,0,0, -mouseDistanceY );
	}
	else if (reRects.bottomResizeItem == pressedRectItem) {
		currRect.adjust(0,0,0, mouseDistanceY );
	}
	else if (reRects.rightBottomResizeItem == pressedRectItem) {
		currRect.adjust(0,0,0, mouseDistanceY );
		currRect.adjust(0,0,mouseDistanceX , 0);
	}
	else if (reRects.leftBottomResizeItem == pressedRectItem) {
		currRect.adjust(0,0,0, mouseDistanceY );
		newPos = QPointF(newPos.x()+mouseDistanceX,newPos.y());
		currRect.adjust(0,0,-mouseDistanceX , 0);
	}
	else if (reRects.leftTopResizeItem == pressedRectItem) {
		newPos = QPointF(newPos.x(),newPos.y()+mouseDistanceY);
		currRect.adjust(0,0,0, -mouseDistanceY );
		newPos = QPointF(newPos.x()+mouseDistanceX,newPos.y());
		currRect.adjust(0,0,-mouseDistanceX , 0);
	}
	else if (reRects.rightTopResizeItem == pressedRectItem) {
		newPos = QPointF(newPos.x(),newPos.y()+mouseDistanceY);
		currRect.adjust(0,0,0, -mouseDistanceY );
		currRect.adjust(0,0,mouseDistanceX , 0);
	}
	
	//gegen zu klein werden
	if (currRect.width() <= minWidth) {
		if (mouseEvent->lastScenePos().x() < mouseEvent->scenePos().x()) { //gegen rumspringen
			newPos = QPointF(newPos.x() + (currRect.width() - minWidth) ,newPos.y());
		}
		currRect.setWidth(minWidth);
	}
	if (currRect.height() <= minHeight) {
		if (mouseEvent->lastScenePos().y() < mouseEvent->scenePos().y()) { //gegen rumspringen
			newPos = QPointF(newPos.x(), newPos.y() + (currRect.height() - minHeight));
		}
		currRect.setHeight(minHeight);
	}

}


SimulScene::~SimulScene() {
}





/*!
    \fn SimulScene::getTimePerStep()
 */
double SimulScene::getTimePerStep() {
	return timePerStep;
}


/*!
    \fn SimulScene::setTimePerStep(int time)
 */
void SimulScene::setTimePerStep(double time) {
	if (time == timePerStep) return;
	timePerStep = time;
	emit timePerStepChanged(time);
}


/*!
    \fn SimulScene::startCalculation()
 */
void SimulScene::startCalculation() {
	//evtl laufenden timer stoppen
	stopTimer();

	//leeren Pfad setezen
	clearFlightPath();
	
	//Feld Item Listen erzeugen (viel schneller, als jedes mal items(point) durchlaufen)
	calcEFieldList.clear();
	calcBFieldList.clear();
	calcStopperList.clear();
	for(int i = 0;  i < items().size(); ++i) {
		//HomoEFieldItems Abarbeiten
		if (qgraphicsitem_cast<HomoEFieldItem*> (items().at(i)) != 0) {
			calcEFieldList << qgraphicsitem_cast<HomoEFieldItem*> (items().at(i));
		}
		//HomoBFieldItems Abarbeiten
		if (qgraphicsitem_cast<HomoBFieldItem*> (items().at(i)) != 0) {
			calcBFieldList << qgraphicsitem_cast<HomoBFieldItem*>(items().at(i));
		}
		//StopperItems Abarbeiten
		if (qgraphicsitem_cast<StopperItem*> (items().at(i)) != 0) {
			calcStopperList << qgraphicsitem_cast<StopperItem*>(items().at(i));
		}
	}


	//berechnung starten
	ellipse1->calculateProbePath(ellipse1->pos());

	pathItem1->setPath(ellipse1->getFlightPath());

	//animationspfad berechnen
	ani->clear();
	int currSteps = ellipse1->getCurrProbePath()->count();
	int entry_step = ceil(currSteps/2500.0); //jeder entry_step(te) step wird eingetragen 
	for (int i=0; i<currSteps; ++i) {
		if (i%entry_step == 0 || i==currSteps) {
			ani->setPosAt(i/(double)currSteps, ellipse1->getCurrProbePath()->at(i) );
		}
	}

	//aenderungen bestimmter Werte bekanntgeben
	QString realSimulTimeString(QLocale().toString(ellipse1->getRealSimulTime(),'g'));
	realSimulTimeString.append(" s");
	emit realSimulTimeChanged(realSimulTimeString); 

	//brauchbare Animationsdauer bestimmen
	setTimeLineDuration(ellipse1->getFlightPath().length()/getPxPerSec() * 1000.0);


}


/*!
    \fn SimulScene::getSteps()
 */
int SimulScene::getSteps() {
	return steps;
}


/*!
    \fn SimulScene::setSteps()
 */
void SimulScene::setSteps(int steps) {
	if (this->steps == steps) return;
	this->steps = steps;
	emit stepsChanged(steps);
	
}

double SimulScene::getPowerAt(QPointF point, double charge, double speedX, double speedY, char xy) {
	double dPower = 0;
	for (int i=0; i<calcEFieldList.size(); ++i) {
		//HomoEFieldItems Abarbeiten
		HomoEFieldItem* myHomoEFieldItem = calcEFieldList.at(i);
		if (myHomoEFieldItem->contains(myHomoEFieldItem->mapFromScene(point))) {
			double power = (myHomoEFieldItem->getFieldPower() * charge);
			double degAngle = myHomoEFieldItem->getRotation();
			double radAngle = degAngle/180.0*PI;
			
			if(xy == 'x') {
				if (degAngle != 180.0) dPower += power * -sin(radAngle);
			}
			if(xy == 'y') {
				if (degAngle != 90.0 && degAngle != 270.0) dPower += power * cos(radAngle);
			}
		}
	}

	for (int i=0; i<calcBFieldList.size(); ++i) {
		//HomoBFieldItems Abarbeiten
		HomoBFieldItem* myHomoBFieldItem = calcBFieldList.at(i);
		if (myHomoBFieldItem->contains(myHomoBFieldItem->mapFromScene(point))) {
			double absSpeed = sqrt(speedX * speedX + speedY * speedY); // Geschwindigkeit im Betrag |v|=sqrt(vx^2+vy^2)
			double absLorentzPower = (charge * absSpeed * myHomoBFieldItem->getFluxDensity() );  //Kraft im Betrag: |F| = q*v*B
			double speedRadAngle = atan2(speedY,speedX); //Winkel des Geschwindigkeitsvekors zur x-Achse im Bogenmass
	
			double PowerRadAngle; //Winkel des Lorentzkraftvektors zur x-Achse im Bogenmass
			if (myHomoBFieldItem->getIsDirectionIntoPlane()) { 
				PowerRadAngle = speedRadAngle - PI/2.0; 			
			} else {
				PowerRadAngle = speedRadAngle + PI/2.0; 			
			}
			//qDebug()<< PowerRadAngle;
	
			if (xy == 'x') {
				dPower += absLorentzPower * cos(PowerRadAngle);
			}
			if (xy == 'y') {
				dPower += absLorentzPower * sin(PowerRadAngle);
			}
		}
	}

	return dPower;

}

bool SimulScene::stopsHere(const QPointF &p1, const QPointF &p2) {
	QPainterPath myPath(p1);
	myPath.lineTo(p2);

	for (int i = 0; i< calcStopperList.count(); ++i) {
		QPainterPath itemPath = calcStopperList.at(i)->mapFromScene(myPath);
		if (calcStopperList.at(i)->collidesWithPath(itemPath/*,Qt::IntersectsItemShape*/)) return true;
	}
	return false;
}

double SimulScene::getMeterPerPx() const {
	return meterPerPx;
}

double SimulScene::getPxPerSec() const {
	return pxPerSec;
}

void SimulScene::setMeterPerPx ( double theValue ) {
	if (theValue == meterPerPx) return;
	meterPerPx = theValue;
	emit meterPerPxChanged(theValue);
}

void SimulScene::setPxPerSec ( double theValue ) {
	if (theValue == pxPerSec) return;
	pxPerSec = theValue;
	emit pxPerSecChanged(theValue);
}


/*!
    \fn SimulScene::getProbeDockWidget() const
 */
QWidget* SimulScene::getProbeDockWidget() const {
    return ellipse1->getDockWidget();
}

void SimulScene::setFlightPathVisible(bool visible) {
	if(pathItem1->isVisible() == visible) return;
	pathItem1->setVisible(visible);
	emit flightPathVisibilityChanged(visible);
}

bool SimulScene::isFlightPathVisible() {
	return pathItem1->isVisible();
}

void SimulScene::setTimeLineDuration(int duration) {
	if(timer->duration() == duration) return;
	timer->setDuration(duration);
	emit timeLineDurationChanged(duration);	
}

int SimulScene::getTimeLineDuration() {
	return timer->duration();
}
QListWidget* SimulScene::getFieldListWidget() {
	return fieldListWidget;
}		
QList<QGraphicsItem*> SimulScene::getItemsInZOrder() {
	QList<QGraphicsItem*> currItems = items();

	bool swapNeeded;
	for (int i=0;i< currItems.count();++i) {
		swapNeeded=false;
		for (int j=0; j< currItems.count() -i -1; ++j){
			if(currItems[j]->zValue() > currItems[j+1]->zValue()) {
				QGraphicsItem* swapper = currItems[j];
				currItems[j]= currItems[j+1];
				currItems[j+1] = swapper;
				swapNeeded = true;
			}
		}
		if(!swapNeeded) break;
	}
	return currItems;
}

QList<QGraphicsItem*> SimulScene::getFieldItemsInZOrder() {
	QList<QGraphicsItem*> currItems;
	for (int i = 0; i< items().size();++i) {
		if(FieldItem::isFieldItem(items().at(i))) currItems.append(items().at(i));
	}

	bool swapNeeded;
	for (int i=0;i< currItems.count();++i) {
		swapNeeded=false;
		for (int j=0; j< currItems.count() -i -1; ++j){
			if(currItems[j]->zValue() > currItems[j+1]->zValue()) {
				QGraphicsItem* swapper = currItems[j];
				currItems[j]= currItems[j+1];
				currItems[j+1] = swapper;
				swapNeeded = true;
			}
		}
		if(!swapNeeded) break;
	}
	//for (int i=0;i< currItems.count();++i) {
	//	qDebug()<< "sort: " <<currItems[i]->zValue();
	//}
	return currItems;
}

void SimulScene::moveFieldItemDown(QGraphicsItem* fieldItem) {
	if (!FieldItem::isFieldItem(fieldItem)) return;
	qreal currFieldItemZValue = fieldItem->zValue();
	QList<QGraphicsItem*> FieldItemsInZOrder = getFieldItemsInZOrder();
	for (int i = 1; i< FieldItemsInZOrder.count();++i) {
		if (FieldItemsInZOrder.at(i) == fieldItem) {
			fieldItem->setZValue(FieldItemsInZOrder.at(i-1)->zValue());
			FieldItemsInZOrder.at(i-1)->setZValue(currFieldItemZValue);
			return;
		}
	}

}

void SimulScene::moveFieldItemUp(QGraphicsItem* fieldItem) {
	if (!FieldItem::isFieldItem(fieldItem)) return;
	qreal currFieldItemZValue = fieldItem->zValue();
	QList<QGraphicsItem*> FieldItemsInZOrder = getFieldItemsInZOrder();
	for (int i = 0; i< FieldItemsInZOrder.count()-1;++i) {
		if (FieldItemsInZOrder.at(i) == fieldItem) {
			fieldItem->setZValue(FieldItemsInZOrder.at(i+1)->zValue());
			FieldItemsInZOrder.at(i+1)->setZValue(currFieldItemZValue);
			return;
		}
	}

}

void SimulScene::moveFieldItemOnTop(QGraphicsItem* fieldItem) {
	if (!FieldItem::isFieldItem(fieldItem)) return;
	qreal currFieldItemZValue = fieldItem->zValue();
	QList<QGraphicsItem*> FieldItemsInZOrder = getFieldItemsInZOrder();

	bool fieldItemHit = false;
	for (int i = 0; i< FieldItemsInZOrder.count()-1;++i) {//currItem rauf wandern lassen
		if (FieldItemsInZOrder.at(i) == fieldItem) {
			fieldItemHit = true;
		}
		if (fieldItemHit) {
			QGraphicsItem* swapper = FieldItemsInZOrder.at(i);
			FieldItemsInZOrder[i] = FieldItemsInZOrder.at(i+1);
			FieldItemsInZOrder[i+1] = swapper;
		}
	}
	for (int i = 0;i<FieldItemsInZOrder.count();++i) { //z-index fuer neue reihenfolge setzen
		FieldItemsInZOrder[i]->setZValue( (FieldDefaultZValue + i*FieldZStep));
	}

}

void SimulScene::moveFieldItemOnBottom(QGraphicsItem* fieldItem) {
	if (!FieldItem::isFieldItem(fieldItem)) return;
	qreal currFieldItemZValue = fieldItem->zValue();
	QList<QGraphicsItem*> FieldItemsInZOrder = getFieldItemsInZOrder();

	bool fieldItemHit = false;
	for (int i = FieldItemsInZOrder.count()-1; i>0 ;--i) { //currItem runter wandern lassen
		if (FieldItemsInZOrder.at(i) == fieldItem) {
			fieldItemHit = true;
		}
		if (fieldItemHit) {
			QGraphicsItem* swapper = FieldItemsInZOrder.at(i);
			FieldItemsInZOrder[i] = FieldItemsInZOrder.at(i-1);
			FieldItemsInZOrder[i-1] = swapper;		
		}
	}
	for (int i = 0;i<FieldItemsInZOrder.count();++i) { //z-index fuer neue reihenfolge setzen
		FieldItemsInZOrder[i]->setZValue( (FieldDefaultZValue + i*FieldZStep));
	}

}

void SimulScene::moveSelectedFieldItemDown() {
	if (selectedItems().isEmpty()) return;
	moveFieldItemDown(selectedItems().first());
}
void SimulScene::moveSelectedFieldItemUp() {
	if (selectedItems().isEmpty()) return;
	moveFieldItemUp(selectedItems().first());
}
void SimulScene::moveSelectedFieldItemOnTop() {
	if (selectedItems().isEmpty()) return;
	moveFieldItemOnTop(selectedItems().first());
}
void SimulScene::moveSelectedFieldItemOnBottom() {
	if (selectedItems().isEmpty()) return;
	moveFieldItemOnBottom(selectedItems().first());
}

GraphicsEllipseItem* SimulScene::getProbeChargeItem() {
	return ellipse1;
}

void SimulScene::clearFlightPath() {
	pathItem1->setPath(QPainterPath());
}

void SimulScene::resetScene() {
	//Alle felder Entfernen
	QList<QGraphicsItem*> currItems = items();
	for (int i = 0; i<currItems.count();++i) 
		if(FieldItem::isFieldItem(currItems.at(i)) )
			delete currItems.at(i);  

	setupVars();
	ellipse1->resetProbe();
}