How do i use okay and cancel buttons on QDialogbox

learnist

i have a QDialog box named "WinApp" , it looks like this , so , when i click ok , the values entered inside two lineedits must be assigned to two QStrings, How can i achieve this ? Because as of now , even if i click "cancel" the values are still being assigned to QStrings.

but if i click cancel the values entered should not be assigned to QStrings.

the code for my WinApp.h is

#pragma once

#include <QtWidgets/qdialog.h>
#include "ui_WinApp.h"

class WinApp : public QDialog, public Ui::WinApp
{
	Q_OBJECT

public:
	WinApp(QWidget *parent = Q_NULLPTR);
	~WinApp();
	
	QString getDialogueValue();

private slots:

private:
	Ui::WinApp ui;
};

the code for my WinApp.cpp is

#include "WinApp.h"

WinApp::WinApp(QWidget *parent)
	: QDialog(parent)
{
	ui.setupUi(this);
}

WinApp::~WinApp()
{
}

QString WinApp::getDialogueValue()
{
	return ui.lineEdit->text();
}

SGaist

Hi,

Where are you doing that assignment ?
Are you taking into account whether you clicked on Ok or Cancel ?

learnist

@SGaist
Thanks for reply, I am doing that assignment in a function in my mainwindow
here is the code

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtCore>
#include <QtGui>
#include <sstream>
#include <QtWidgets/qmessagebox.h>
#include <QtWidgets/qlistwidget.h>

using namespace std;

MainWindow::MainWindow(QWidget* parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->My_listwidget->addItem("New York");
    ui->My_listwidget->addItem("Glasgow");
    ui->My_listwidget->addItem("Mumbai");
}

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

void MainWindow::on_My_listwidget_itemDoubleClicked(QListWidgetItem* item)
{
    QString test = item->text();
    std::string test_s = test.toStdString();

    if (test_s.find("New York") != std::string::npos) // check if item contains text "New York"
    {
        WinApp winApp;
        winApp.setModal(true);   //Displaying the window here
        winApp.exec();
		
		QString testo =winApp.getDialogueValue(); // Getting the value from 1st line edit here from getter function and assignment is happening here. 

         item->setText(testo);    
         item->setData(CapitalRole, testo);
    }
    
    if (test_s.find("Glasgow") != std::string::npos) 
    {
    // show another dialog box asking some questions
    }
    if (test_s.find("Mumbai") != std::string::npos) 
    {
    // show another dialog box asking some questions
    }
}

SGaist

You don't take into account the return value of exec. Use it to know whether the dialog was accepted or rejected and act accordingly.

learnist

@SGaist Im sorry , i do get a bit of idea what you are indicating but kinda confused where can i chnange something ,can you show me any changes in code ?

SGaist

QDialog::exec returns a DialogCode. Store the returned value of your exec call and then use an if statement to check if the value is Accepted and of so, do your processing.

learnist

@SGaist thanks, this did the trick.

WinApp winob;
winob.exec();
if (winob.result() == QDialog::Accepted) {
   String = dialog.getDialogueValue();
}

Pl45m4

@learnist said in How do i use okay and cancel buttons on QDialogbox:

WinApp winob;
winob.exec();
if (winob.result() == QDialog::Accepted) {
String = dialog.getDialogueValue();
}

This may work, but it's more code than you actually need ;)
As @SGaist said before, dialog.exec() returns the exit code. So you don't need to call result() at all.

WinApp winob;
if (winob.exec() == QDialog::Accepted) // This works as well
{
   QString val = winob.getDialogueValue();
}