How pass the data from dialog box to mainwindow

Pawan Pal

Hi Volker

I have no solution and no idea how pass the data from dialog box to mainwindow. give the code.

[andreyc EDIT]: I moved this thread from "this one":http://qt-project.org/forums/viewthread/10614/ because that thread is 3 years old.

IamSumit

Hi Pawan Pal ,
Welcome to Qt Devnet ,
Create an object of QMainwindow inside the QDialog class, You should pass your data into the constructor.
e.g;

//inside QDialog class (.cpp)

#include "main.h"
int data1,data2;
Main *main=new Main(this,data1,data2);

and then in Main(QMainWindow) class constructor add 2 parameters, int,int.

here is your main class
//in.h file
class Main:public QMainWindow
{
Main(QWidget *parent,int,int);

}
//in .cpp file

Main::Main(QWidget *parent,int d1,int d2) :
QMainWindow(parent)
{
setupUi(this);

qDebug() << d1 << d2 ;   //Here is your data of Qdialog

}
This is Rough Code
Hope it will help you :)

Pawan Pal

Hi Sumit

Thanks for this code but, I am not understand you are not explain clearlly.
why not give to me simple example.
Actually my Ques. is when i push the button the text in text Edit transfer to the another window.

Thanks and Regards
Pawan

IamSumit

The example that i have given to you is very simple.
For this You need to work on SIGNAL and SLOT ;
your problem is very basic.
Just try to get basic knowledge from tut and docs.
if not solved then find various link/tutorial available on net.
Hope it helps.

Pawan Pal

I know Single Slot function. already i used this mechanism ok but its not work

Pawan Pal

Hi
This is my code, how to used 'strlen' command. I want display the number of character.

string str = "Amazon";

if(!strlen(str.c_str))
{
ui->textEdit->setText(str);

}

IamSumit

You should use QString .

QString str ="Example"

int len = str.length();

hope it helps

Pawan Pal

Hi Everybody
how used and compare two string. This is my code.

void MainWindow::start_cummunication()

{

if (!strcmp("!PKS",start_cumm) !=0);

else

    ui->textEdit->setText("Error : Communication
    NotEstabilished");

}

Pawan Pal

Hi Sumit

Thanks, for code but its not working, comeing errror.
I written this code.

 QString str = "loni";
 int length = str.length();
 ui->lineEdit->setText(length);

Error : invalid conversion from 'int' to 'const char*' [-fpermissive]

andreyc

Try this one
@
QString str = “loni”;
int length = str.length();
ui->lineEdit->setText(QString("%1").arg(length));
@

IamSumit

Hi Pawam.
[quote author="Pawan Pal" date="1396583482"]Hi Sumit

Thanks, for code but its not working, comeing errror.
I written this code.

 QString str = "loni";
 int length = str.length();
 ui->lineEdit->setText(length);

Error : invalid conversion from 'int' to 'const char*' [-fpermissive]

[/quote]

edit your code in one line
ui->lineEdit->setText(QString::number(length));
Hope it helps

Pawan Pal

Thanks Sumit

Its working

Pawan Pal

Thanks andreyc

your code is working

Pawan Pal

Plz Help me