How to set reminder in qt

prabhatjha

hello everyone i want to make reminder in qt...so first of all i set current time on a label and now i want to set alarm after 2 hours and when 2 hours will be complete there will be a message box open and that will remind us that your time have been completed. please give me some suggesion i know what will be logic use here but dont know how to implement in qt.

prabhatjha

this is my code what i used but i am getting error error: no match for 'operator-' in 'settime - CurrentTime'
@
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include<QTimer>
#include<QTime>
#include<qDebug>

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

QTimer *timer = new QTimer(this);;
timer->setInterval(60);
connect(timer, SIGNAL(timeout()),this,SLOT(update_time()));
timer->start();

}

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

void MainWindow::update_time()
{
ui->label_time->setText(QTime::currentTime().toString());

QString CurrentTime = QTime::currentTime().toString();

if ( ui->lineEdit->text() != "")
{
    QString settime = ui->lineEdit->text();
    qDebug()<<settime;

    QString Diff = settime - CurrentTime;

    if (Diff == "00:00:00")
    {
        QMessageBox msgBox;
        msgBox.setText("Your time has been finished.");
    }
}

}
@
error: no match for 'operator-' in 'settime - CurrentTime'

sierdzio

You are trying to substract string... this will not work! You need to use QTime/ QDateTime classes here.

prabhatjha

for current time i can use QTime currtime = QTime::currentTime() but what i should use for the time when i will set alarm ...let i want to set alarm after 2 hours then where i will store these time...please give me some solution ...thanks in advance.

sierdzio

@
QTime currtime = QTime::currentTime();
QTime alarmTime = currtime.addSecs(2 * 3600);
@

I would personally prefer to use QDateTime, which has addHours() method. Plus, you can actually set the timer to 2 hours and skip the whole QTime hassle.