How to Use Objects

[raphaelf]

Hi everybody..
I have for examples 2 classes (2 Dialogs). My example send a text from a dialog to the other one. It Works.
But my Question is if my way are correct? Can somebody show me how the professional way works and what is not ok on my example?
my function sendString() are sending a text to the other dialog..

Thanks forwading

main.cpp

//Vorlage für Dialoge
 
//Klassen:
#include "mydialog.h"
#include <QApplication>
 
 
     int main(int argc, char *argv[])
    {
        QApplication app(argc, argv);
        MyDialog mydialog;
 
        mydialog.show();
        return app.exec();
    }

//Vorlage für Dialoge

//Klassen:
#include "mydialog.h"
#include <QApplication>
    

     int main(int argc, char *argv[])
    {
        QApplication app(argc, argv);
        MyDialog mydialog;
        
        mydialog.show();
        return app.exec();
    }

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mydialog.h

#include "ui_dialog.h"
 
 
//My Dialog ist eine Vererbte Klasse von UI_Dialog
class MyDialog : public QDialog
    {
        Q_OBJECT
 
    public:
        MyDialog(QWidget *parent = 0);
        Ui::Dialog ui;
 
     //Funktionen
     public slots:
     	void showMessage();
     	void showDialogSuchen();
 
 
    private:
    	//Ui::<Name des Objekts, siehe Designer> ui
 
 
    };

#include "ui_dialog.h"


//My Dialog ist eine Vererbte Klasse von UI_Dialog
class MyDialog : public QDialog
    {
        Q_OBJECT

    public:
        MyDialog(QWidget *parent = 0);
        Ui::Dialog ui;
        
     //Funktionen
     public slots:
     	void showMessage();
     	void showDialogSuchen();
        

    private:
    	//Ui::<Name des Objekts, siehe Designer> ui
        
    
    };

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mydialog.cpp

//Klassen:
#include "mydialog.h"
#include "dialogsuchen.h"
#include <QMessageBox>
 
//Konstruktor
MyDialog::MyDialog(QWidget *parent)
        : QDialog(parent)
    {
        ui.setupUi(this);
 
         connect(ui.okButton, SIGNAL(clicked()), this, SLOT(showMessage()));
         connect(ui.cancelButton, SIGNAL(clicked()), this, SLOT(close()));
         connect(ui.openButton, SIGNAL(clicked()), this, SLOT(showDialogSuchen()));
    }
 
//Diese Funktion zeigt eine MessageBox an
void MyDialog::showMessage()
{
	 QMessageBox::information(this, "Application name",
    "Hallo Welt\n"
    "Tutorial 1");
}
void MyDialog::showDialogSuchen()
{
	DialogSuchen dialogsuchen(this);
	dialogsuchen.exec();
 
}

//Klassen:
#include "mydialog.h"
#include "dialogsuchen.h"
#include <QMessageBox>

//Konstruktor
MyDialog::MyDialog(QWidget *parent)
        : QDialog(parent)
    {
        ui.setupUi(this);
        
         connect(ui.okButton, SIGNAL(clicked()), this, SLOT(showMessage()));
         connect(ui.cancelButton, SIGNAL(clicked()), this, SLOT(close()));
         connect(ui.openButton, SIGNAL(clicked()), this, SLOT(showDialogSuchen()));
    }

//Diese Funktion zeigt eine MessageBox an
void MyDialog::showMessage()
{
	 QMessageBox::information(this, "Application name",
    "Hallo Welt\n"
    "Tutorial 1");
}
void MyDialog::showDialogSuchen()
{
	DialogSuchen dialogsuchen(this);
	dialogsuchen.exec();
	
}

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dialogsuchen.h

#include "ui_dialogsuchen.h"
 
 
//My Dialog ist eine Vererbte Klasse von UI_Dialog
class DialogSuchen : public QDialog
    {
        Q_OBJECT
 
    public:
        DialogSuchen(QWidget *parent = 0);
 
     //Funktionen
     public slots:
     	void showMessage();
     	void sendString();
 
 
    private:
    	//Ui::<Name des Objekts, siehe Designer> ui
        Ui::DialogSuchen ui;
 
    };

#include "ui_dialogsuchen.h"


//My Dialog ist eine Vererbte Klasse von UI_Dialog
class DialogSuchen : public QDialog
    {
        Q_OBJECT

    public:
        DialogSuchen(QWidget *parent = 0);
        
     //Funktionen
     public slots:
     	void showMessage();
     	void sendString();
        

    private:
    	//Ui::<Name des Objekts, siehe Designer> ui
        Ui::DialogSuchen ui;
    
    };

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dialogsuchen.cpp

//Klassen:
#include "dialogsuchen.h"
#include "mydialog.h"
#include <QMessageBox>
 
//Konstruktor
DialogSuchen::DialogSuchen(QWidget *parent)
        : QDialog(parent)
    {
        ui.setupUi(this);
 
         connect(ui.okButton, SIGNAL(clicked()), this, SLOT(showMessage()));
         connect(ui.cancelButton, SIGNAL(clicked()), this, SLOT(close()));
         connect(ui.sendButton, SIGNAL(clicked()), this, SLOT(sendString()));
 
    }
 
//Diese Funktion zeigt eine MessageBox an
void DialogSuchen::showMessage()
{
	 QMessageBox::information(this, "Application name",
    "Hallo Welt\n"
    "Tutorial 1");
}
void DialogSuchen::sendString()
{
	MyDialog *mydialog = qobject_cast<MyDialog*>(parent());
	QString text = ui.lineEdit->text();
 
	mydialog->ui.textEdit->setPlainText(text);
 
 
}

//Klassen:
#include "dialogsuchen.h"
#include "mydialog.h"
#include <QMessageBox>

//Konstruktor
DialogSuchen::DialogSuchen(QWidget *parent)
        : QDialog(parent)
    {
        ui.setupUi(this);
        
         connect(ui.okButton, SIGNAL(clicked()), this, SLOT(showMessage()));
         connect(ui.cancelButton, SIGNAL(clicked()), this, SLOT(close()));
         connect(ui.sendButton, SIGNAL(clicked()), this, SLOT(sendString()));
        
    }

//Diese Funktion zeigt eine MessageBox an
void DialogSuchen::showMessage()
{
	 QMessageBox::information(this, "Application name",
    "Hallo Welt\n"
    "Tutorial 1");
}
void DialogSuchen::sendString()
{
	MyDialog *mydialog = qobject_cast<MyDialog*>(parent());
	QString text = ui.lineEdit->text();
	
	mydialog->ui.textEdit->setPlainText(text);
	
	
}

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[munna]

I think it should be something like

void MyDialog::showDialogSuchen()
{
   DialogSuchen dialogsuchen(this);
   connect(&dialogsuchen,SIGNAL(sendString(QString)), this, SLOT(onSendString(QString)));
   dialogsuchen.exec();
}

void MyDialog::showDialogSuchen()
{
   DialogSuchen dialogsuchen(this);
   connect(&dialogsuchen,SIGNAL(sendString(QString)), this, SLOT(onSendString(QString)));
   dialogsuchen.exec();
}

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void DialogSuchen::onSendString()
{
    emit sendString(ui.lineEdit->text());
}

void DialogSuchen::onSendString()
{
    emit sendString(ui.lineEdit->text());
}

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