How to set reminder in qt
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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.
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this is my code what i used but i am getting error error: no match for 'operator-' in 'settime - CurrentTime'
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#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."); } }
}
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error: no match for 'operator-' in 'settime - CurrentTime' -
You are trying to substract string... this will not work! You need to use QTime/ QDateTime classes here.
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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.
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@
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.