Problem with new object from another class

[Marcel92]

Hi
I am sure it´s a minor problem, but i cant find a solution to my problem.
I am trying to declare a new object from another class and then use a method.
The other class has an overloaded constructor and i think thats my problem.

#pragma once
/*!  ----------------------------------------------------------------------------
* Name:	  				AnalyseEKG.h
* Autor:				Ritthaler
* Version:				1.0
* Copyright: 			Team 3KG
* Description:			Softwarepraktikum SoSe 2017
*
* Abhängige Dateien: AnalyseEKG.cpp
* Änderungen:
*
* Name             | Version        |   Datum/Zeit        |Grund
*    Ritthaler     |    1.0         |    07.05.17         |Erstellung
*    Ritthaler     |    1.1         |    07.06.17         |Bearbeitung
*    Ritthaler     |    1.2         |    10.06.17         |Bearbeitung
*                  |                |                     |
* ----------------------------------------------------------------------------*/
#ifndef _ANALYSE_EKG_
#define _ANALYSE_EKG_
#include <vector>
#include <string>
#include <AnalyseLagetyp.h>
#include <AnalyseSTEMI.h>

using namespace std;

class AnalyseEKG
{



public:

	/*!
	* Aufgabe:  Konstruktor
	*
	* Input:	Zweidimensionaler double-Vektor
	*
	* Output:  -
	*
	*/

    AnalyseEKG(std::vector<std::vector<double>> v);
	~AnalyseEKG();
	/*!
	* Aufgabe: Liefert die Anzahl der R-Zacken zurück
	*
	* Input:	 -
	*
	* Output:  int 
	*
	*/
	int getAnzRZacken(); 

	/*!
	* Aufgabe: liefert die Herzfrequenz zurück
	*
	* Input:	-
	*
	* Output:  int HF
	*
	*/

	int getHF();

	/*!
	* Aufgabe: liefert den Lagetyp zurück
	*
	* Input:	 -
	*
	* Output:  string Lagetyp
	*
	*/
	
    string getLagetyp();

	/*!
	* Aufgabe: liefert STEMI ja/nein zurück
	*
	* Input:	 -
	*
	* Output:  bool 
	*
	*/

	bool getSTEMI();


private:
   // vector<double> vAuswertung; //!Vektor mit EKG-Ableitungen: Zeit I II III aVR aVF aVL
    std::vector<std::vector< double > > vAuswertung;


	/*!
	* Aufgabe: Markierung der Q- und R-Zacken im EKG
	*
	* Input:	-
	*
	* Output:  -
	*
	*/
	void MarkiereEKG(); 
	


    std::vector<int> PositionQZacke;	//! Speichert Positionen der Q-Zacken
    std::vector<int> PositionRZacke;	//! Speichert Positionen der R-Zacken



	

};



#endif //_ANALYSE_EKG___

/*! ----------------------------------------------------------------------------
* Name: mainwindow.h
* Autor:    Sk...., Marcel
*           Stangl, Florian
*
* Version: 0.9
* Erstellung: 02.05.2017
* Copyright: Team 3KG
* Description: Softwarepraktikum SoSe 2017
*
* Abhängige Dateien: Befunder.cpp, Person.h, Person.cpp, EKG2File.h, EKG2File.cpp
*                   qcustomplot.h, qcustomplot.cpp
*
* Aufgabe: GUI Erstellen und alle Operationen ausführen
*
* Änderungen:
*
* Name					| Version	| Datum/Zeit	|Grund
* | | |
* | | |
* ----------------------------------------------------------------------------*/

#pragma once

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

//! @brief Include für das QT
#include <QMainWindow>
//! @brief Include der abhängigen Dateien (Klassen)
#include "befunder.h"
#include "patient.h"
#include "person.h"
#include "EKG2File.h"
#include "AnalyseEKG.h"
#include "AnalyseLagetyp.h"
#include "AnalyseSTEMI.h"
//! @brief Include für Graphenausgabe
#include <qcustomplot.h>
#include <QVector>
#include <vector>


namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
//! @brief Konstruktor
    explicit MainWindow(QWidget *parent = 0);
//! @brief Destruktor
    ~MainWindow();

//! @brief  Slots zur Verarbeitung der Befehle auf der Oberfläche
private slots:


private:

//! @brief Objekt Vektor für den Plot
    EKG2File werteVector;

    
//! @brief Objekt für die Herzfrequenz
    AnalyseEKG herzfrequenz (std::vector<std::vector<double>> hfVector); //////////////  here is the problem. he doesnt recognize "herzfrequenz"(it´s not colored red). but theres no error message here.
//! @brief Objekt für den Lagetyp
    AnalyseEKG lagetyp; /////// here i want to do the same. he recognizes "lagetyp" (colors it red). but thats wrong, because he needs a vector.
//! @brief Objekt für den STEMI
    //AnalyseEKG stemi;


#endif // MAINWINDOW_H

void MainWindow::einthoven_plotten()
{  

    std::vector<std::vector<int>> hfVectors;
    graph_erstellen();

    do
    {
       
        plotVector = werteVector.createEKGVector(i);
        x.append(plotVector[0]);
        abl1.append(plotVector[1]);
        abl2.append(plotVector[2]);
        abl3.append(plotVector[3]);

        ui->Plot1->graph(0)->setData(x,abl1);
        ui->Plot1->replot();

        ui->Plot2->graph(0)->setData(x,abl2);
        ui->Plot2->replot();
        ui->Plot3->graph(0)->setData(x,abl3);
        ui->Plot3->replot();

        hfVectors = herzfrequenz.getHF(); /////// i want to use it here, but the error message says "D:\Programme\QT\MeineProjekte\3KG_3.0\mainwindow.cpp:792: Fehler: '((MainWindow*)this)->MainWindow::herzfrequenz' does not have class type
         hfVectors = herzfrequenz.getHF();
                     ^
////////////////////////////////
        if(plotVector[0] == max)
        {
            QApplication::processEvents();
            max = max + 1;
            min = min + 1;

            ui->Plot1->xAxis->setRange(min,max);
            ui->Plot1->replot();

            ui->Plot2->xAxis->setRange(min,max);
            ui->Plot2->replot();

            ui->Plot3->xAxis->setRange(min,max);
            ui->Plot3->replot();

        }

        i++;
    }while(i != 10000 || stoppVariable != 0);
}

ive marked the problem lines with ///////////

Thanks in advance.

[mrjj]

@Marcel92 said in Problem with new object from another class:

Hi, easy way around it is just to use pointer
in mainwindows.h
AnalyseEKG *herzfrequenz=NULL;

then before any use, you do
std::vector<std::vector<double>> v; // note its local.
herzfrequenz = new AnalyseEKG (v); // give it the vector

Alternatively you can assign such members via constructor list
http://en.cppreference.com/w/cpp/language/initializer_list

You can also add a second constructor taking no arguments and add a
setVector function so you can add vector later. (before use)

Note that it seems to copy the vector to its private variable. ( i assume its by design)
Note2: The einthoven_plotten contains a loop that if very long, will hang the application.

[Marcel92]

Hey @mrjj
Thanks for your answer.
I tried your pointer solution

AnalyseEKG *herzfrequenz=NULL;


    std::vector<std::vector<double>> v; // note its local.
    herzfrequenz = new AnalyseEKG (v); // give it the vector

But then it gives me the error : herzfrequenz does not name a type?? I dont get it.

[mrjj]

@Marcel92
Did you add
#include "AnalyseEKG.h"
in mainwindow.h
so it knows the type for
AnalyseEKG *herzfrequenz=NULL;

also the using code is inside a member function of mainwinow?

#include "AnalyseEKG.h"

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
void Using();
private:
    Ui::MainWindow *ui;
AnalyseEKG *herzfrequenz=NULL;
};

then in mainwindow.cpp

MainWindow::void Using() {
 std::vector<std::vector<double>> v; // note its local.
 herzfrequenz = new AnalyseEKG (v); // give it the vector. Note you should call delete on this when finished using it
}

[Marcel92]

Oh i wasnt using it in a member function -.-

Thank you so much!

[mrjj]

@Marcel92
Np :)

Note that each time you call Using() , a new class is created.
If that not what you want then use this not so pretty construct

if (! herzfrequenz)
herzfrequenz = new AnalyseEKG (v); // will only run once.

but make sure it says
AnalyseEKG *herzfrequenz=NULL; in .h file ( or nullptr)