lsim/src/simulscene.cpp

/***************************************************************************
 *   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 <QRectF>
#include <QGraphicsSceneMouseEvent>
#include <QtDebug>
#include <QApplication>
#include <QGraphicsRectItem>
#include <QKeyEvent>
#include <QGraphicsItemGroup>



SimulScene::SimulScene ( QObject* parent ) : QGraphicsScene ( parent ) {
	//variablen initialisieren
	setTimePerStep(0.00001);
	setSteps(1000);
	//setMeterPerPx(1/1000.0);
	setMeterPerPx(1);

	currHomoEfieldInsertItem = 0;
	currHomoEfieldEditItem = 0;
	currHomoBfieldInsertItem = 0;
	currHomoBfieldEditItem = 0;

	createResizeRects();

	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(1);
	//ellipse1->scale(4,4);
	ellipse1->setAcceptDrops(true);	


	addItem(ellipse1);	
	
	timer = new QTimeLine( 30000);
	//qDebug()<< (200e-3/8.0e+6) *1000 * 2e+8;
	timer->setFrameRange(0,100);
	timer->setUpdateInterval(25);
	timer->setCurveShape(QTimeLine::LinearCurve);
	//timer->toggleDirection();
	ani = new QGraphicsItemAnimation();
	ani->setItem(ellipse1);
	ani->setTimeLine(timer);


}

void SimulScene::startTimer() {
	for (int i=0; i<getSteps(); ++i) {
		//ani->setPosAt(i/200.0, QPointF(x , 0.5 * ay * pow(( (x/1000) /vx),2) *1000 ));
		ani->setPosAt(i/(double)getSteps(), ellipse1->getCurrProbePath()->at(i) );
		//qDebug()<< getSteps();
	}
	timer->start();
}

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()));
			addItem(currHomoEfieldInsertItem);
			QApplication::setOverrideCursor(QCursor(Qt::SizeFDiagCursor));
			break;
		case HomoBFieldItemInsert:
			if (mouseEvent->button() != Qt::LeftButton) break; //benutze nur linke maustaste
			currHomoBfieldInsertItem = new HomoBFieldItem(QRectF(mouseEvent->scenePos(),mouseEvent->scenePos()));
			addItem(currHomoBfieldInsertItem);
			QApplication::setOverrideCursor(QCursor(Qt::SizeFDiagCursor));
			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 {
				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()));
				
			}

		}
	}
	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 {
		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 (currHomoEfieldEditItem != 0) {
		update();
		QApplication::restoreOverrideCursor();
	}
	else if (currHomoBfieldEditItem != 0) {
		update();
		QApplication::restoreOverrideCursor();
	}
	pressedResizeItem = 0;
	currHomoEfieldInsertItem = 0;
	currHomoBfieldInsertItem = 0;
	currHomoEfieldEditItem = 0;
	currHomoBfieldEditItem = 0;

	QGraphicsScene::mouseReleaseEvent(mouseEvent);
}

void SimulScene::keyPressEvent (QKeyEvent *keyevent) {
	if(keyevent->key() == Qt::Key_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;
}

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() {
    ellipse1->calculateProbePath(ellipse1->pos());
}


/*!
    \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, char xy) {
	double dPower = 0;
	for(int i = 0;  i < items(point).size(); ++i) {
		//HomoEFieldItems Abarbeiten
		if (qgraphicsitem_cast<HomoEFieldItem*> (items(point).at(i)) != 0) {
			HomoEFieldItem* myHomoEfieldItem = qgraphicsitem_cast<HomoEFieldItem*> (items(point).at(i));
			double power = (myHomoEfieldItem->getFieldPower() * charge);
			double degAngle = myHomoEfieldItem->getRotation();
			double radAngle = degAngle/180.0l*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);
			}
		}
	}

	return dPower;

}

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


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


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