Slots/Signals newbie question

abollo

Hi I am pretty much a newbie to Qt. I tried searching for an answer to this question but I couldn't find I clear question so I hope you can help me with this.

Basically I am trying to do a simple login program
What I have is mainwindow and systemlogin window. A button in mainwindow opens the systemlogin window. In the systemlogin window there is a textfield and a button. When this button is clicked I need to compare the string value in the textfield to a table that is implemented in mainwindow.cpp
I found out that the best way to do this is by using slots and singals

Here is the code I have so far

mainwindow.cpp

@#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "systemlogin.h"
#include "userlogin.h"
#include "hashTable.h"
#include <fstream>
#include <string>
#include <QString>
#include <QFile>
#include <QTextStream>
using namespace std;

string pass = "admin"; //is actually a hashtable but using string for simplicity

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}

MainWindow::~MainWindow()
{
delete ui;
}

void MainWindow::on_pushButton_clicked()
{
systemlogin systemLogin;
systemLogin.setModal(true);
systemLogin.exec();
}

void MainWindow::on_pushButton_3_clicked()
{
this->close();
}

bool login (string input)
{
if (input == pass)
return true;
else
return false;
}@

systemlogin.cpp

@#include "systemlogin.h"
#include "ui_systemlogin.h"

systemlogin::systemlogin(QWidget *parent) :
QDialog(parent),
ui(new Ui::systemlogin)
{
ui->setupUi(this);
}

systemlogin::~systemlogin()
{
delete ui;
}

void systemlogin::on_pushButton_clicked()
{
/*Gets a string userinput from the textfield and is supposed to call the login function from mainwindow so it checks
login(userinput)
*/
}

void systemlogin::on_pushButton_2_clicked()
{
this->hide();
}
@

I hope my question is not vague
So how do I go about doing this
I read that I should add connect to the cpp files. Any pointers on how to do that would be appreciated.

SGaist

Hi and welcome to devnet,

"This":http://qt-project.org/doc/qt-5/designer-using-a-ui-file.html#a-dialog-without-auto-connect part of the documentation is what you are looking. You have described there the two possible connection technique (i.e. by hand and automatic)

Hope it helps