display QSplashScreen

[HelloDan]

At the startup of a Qt program, I want to display a QSplashScreen. Maybe it's too fast to get the image. But how can i make the image to last for 2 seconds.
I'm a greenhand, Thanks!

[janus]

Hi,
maybe you can connect a QTimerto a splashscreen slot. But in general you should be happy that your app starts so fast

[HelloDan]

Hi,
maybe you can connect a QTimerto a splashscreen slot. But in general you should be happy that your app starts so fast

I had looked up the documentation, but i failed to make it. Can you give me an example? Thanks

[GioFX]

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    QSplashScreen *splash = new QSplashScreen;
    splash->setPixmap(QPixmap(":/images/splash.png"));
    splash->show();
 
    MyApp mainwindow;
 
    QTimer::singleShot(2500, splash, SLOT(close()));
    QTimer::singleShot(2500, &mainwindow, SLOT(show()));
 
    return app.exec();
}

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QSplashScreen *splash = new QSplashScreen;
    splash->setPixmap(QPixmap(":/images/splash.png"));
    splash->show();

    MyApp mainwindow;

    QTimer::singleShot(2500, splash, SLOT(close()));
    QTimer::singleShot(2500, &mainwindow, SLOT(show()));

    return app.exec();
}

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[HelloDan]

Thanks for your reply.

But the main problem is that I can't see the image. Even I can make it to delay 2s, but the startup picture didn't turn up.

What's the problem? Can anyone help? Thanks

[janus]

Hi,

hard to guess without code

[GioFX]

Thanks for your reply.

But the main problem is that I can't see the image. Even I can make it to delay 2s, but the startup picture didn't turn up.

What's the problem? Can anyone help? Thanks

did you set up a qrc file?

[HelloDan]

did you set up a qrc file?

Thanks for your advice.

#include <QApplication>
#include <QSplashScreen>
//#include <QThread>
//#include<QTimer>
#include<ctime>
#include "mainwindow.h"
/*
class SleeperThread : public QThread
{
public:
static void msleep(unsigned long msecs)
{
QThread::msleep(msecs);
}
};
*/
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
 
    QSplashScreen *splash=new QSplashScreen;
    splash->setPixmap(QPixmap(":/images/splash.png"));
    splash->show();
 
    //splash->showMessage( "Initializing..." );
   // app.processEvents();
    //......................
    MainWindow mainWin;
 
   splash->showMessage( "Creating Widgets Page..." );
   app.processEvents();
 
   splash->showMessage( "Creating Database Page..." );
    app.processEvents();   
 
    splash->showMessage( "Creating Games Page..." );
   app.processEvents();
 
    // SleeperThread::msleep(2000);
 
    time_t t;
	t = time(NULL);
 
 
    //QTimer::singleShot(2500, splash, SLOT(close()));
    //QTimer::singleShot(2500, &mainWin, SLOT(show()));
 
 
 
    mainWin.show();
 
    while( difftime(time(NULL),t) < 5.0  ) { }
 
 
    splash->finish(&mainWin);
    delete splash;
 
    return app.exec();
}

#include <QApplication>
#include <QSplashScreen>
//#include <QThread>
//#include<QTimer>
#include<ctime>
#include "mainwindow.h"
/*
class SleeperThread : public QThread
{
public:
static void msleep(unsigned long msecs)
{
QThread::msleep(msecs);
}
};
*/

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
   
    
    QSplashScreen *splash=new QSplashScreen;
    splash->setPixmap(QPixmap(":/images/splash.png"));
    splash->show();
   
    //splash->showMessage( "Initializing..." );
   // app.processEvents();
    //......................
    MainWindow mainWin;
    
   splash->showMessage( "Creating Widgets Page..." );
   app.processEvents();
    
   splash->showMessage( "Creating Database Page..." );
    app.processEvents();   
   
    splash->showMessage( "Creating Games Page..." );
   app.processEvents();
   
    // SleeperThread::msleep(2000);

    time_t t;
	t = time(NULL);

    
    //QTimer::singleShot(2500, splash, SLOT(close()));
    //QTimer::singleShot(2500, &mainWin, SLOT(show()));
    
   

    mainWin.show();

    while( difftime(time(NULL),t) < 5.0  ) { }


    splash->finish(&mainWin);
    delete splash;
    
    return app.exec();
}

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This time, I changed my code and alse set up my qrc file. But the program just show a left top rectangle area of the program instead of the image. How can i make image show?
I will appreciate any reply. Thanks

[janus]

Hi,

did you add qrc file to the project file and does it have the correct path prefix?

[HelloDan]

Hi,

did you add qrc file to the project file and does it have the correct path prefix?

Thanks! In fact I had done all the things. But I found that the following code did make shown the startup images. But the image under the program, So I can't see the startup image. Thanks

#include <QApplication>
#include<QTimer>
#include <QSplashScreen>
#include "mainwindow.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    QSplashScreen *splash = new QSplashScreen;
    splash->setPixmap(QPixmap(":/images/splash.png"));
    splash->show();
 
 
 
    MainWindow mainWin;
 
    QTimer::singleShot(2500, splash, SLOT(close()));
    QTimer::singleShot(2500, &mainWin, SLOT(show()));
 
 
    mainWin.show();
    return app.exec();
}

#include <QApplication>
#include<QTimer>
#include <QSplashScreen>
#include "mainwindow.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    
    QSplashScreen *splash = new QSplashScreen;
    splash->setPixmap(QPixmap(":/images/splash.png"));
    splash->show();

    
    
    MainWindow mainWin;
    
    QTimer::singleShot(2500, splash, SLOT(close()));
    QTimer::singleShot(2500, &mainWin, SLOT(show()));

    
    mainWin.show();
    return app.exec();
}

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[aamer4yu]

You shouldnt be calling mainWin.show() since it will show after timer times out.

Still you can have the following sequence too -

mainWin.show();
splash.show();
QTimer::singleShot(2500, splash, SLOT(close()));

mainWin.show();
splash.show();
QTimer::singleShot(2500, splash, SLOT(close()));

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Hope it works

[talk2amulya]

i dont think mainWin should be shown before the splashscreen..after all, the primary reason of using a splashscreen is to show smth until the main window will show..thus, just removing the mainWin.show should work..also u can have a bit of delay in closing the splash and showing the mainWin..so, if i were u, i'd write

MainWindow mainWin;
 
QTimer::singleShot(2500, splash, SLOT(close()));
QTimer::singleShot(2600, &mainWin, SLOT(show()));

MainWindow mainWin;
    
QTimer::singleShot(2500, splash, SLOT(close()));
QTimer::singleShot(2600, &mainWin, SLOT(show()));

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[HelloDan]

You shouldnt be calling mainWin.show() since it will show after timer times out.

Still you can have the following sequence too -

mainWin.show();
splash.show();
QTimer::singleShot(2500, splash, SLOT(close()));

mainWin.show();
splash.show();
QTimer::singleShot(2500, splash, SLOT(close()));

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Hope it works

Thanks. But I just want the splash to show up before the app