Show UI Design not in main metod is possible?

Vetryaspa

Hi all of us, i'm a new in the symbian world, I have a problem:

I try to show the UI design view from not main method but not work:

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

MainWindow mainWindow;
mainWindow.setOrientation(MainWindow::ScreenOrientationLockPortrait);
mainWindow.showExpanded();

RootViewer rootView;
rootView.showFullScreen();
return app.exec();

}
@

I call the RootView Costructor that is an Qt Design C++ class and have RootViewer.h , RootViewer.cpp, RootViewer.ui

in the RootViewer.ui file I have put only a label with the text line "Root" and the main show currectly in the emulator the screen with the line "Root"

and this is the problem:

this is my RootViewer.cpp :

@
#include "rootviewer.h"
#include "ui_rootviewer.h"
#include "splash.h"
#include <QDebug>
#include <QtGui/QApplication>

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

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

void RootViewer::lanciaSplash(){

qDebug()<<"SPLASH"<<endl;

Splash showSplash;
showSplash.showFullScreen();

}
@

why the splash.ui doesn't show ? the qDebug "SPLASH" are written in the Application Output then the method is call...

Someone can help me?

Sorry for my very bad english

Franzk

[quote author="Vetryaspa" date="1307640421"]@void RootViewer::lanciaSplash(){

qDebug()<<"SPLASH"<<endl;

Splash showSplash;
showSplash.showFullScreen();

}@
[/quote]

The showFullScreen() function is probably non-blocking. The splash screen will be destroyed immediately after you showed it, because it is created on the stack. This means the screen will not be showed at all. A better solution would most likely be:

@
void RootViewer::lanciaSplash(){

qDebug()<<"SPLASH"<<endl;

Splash *showSplash = new Splash;
showSplash->setWindowAttributes(WA_DeleteOnClose, true); // delete the thing when we're done showing
showSplash->showFullScreen();

}@

The widget is created on the heap and it stays in existence until it is explicitly deleted.

Vetryaspa

Tnx for reply but I have an error: 'class Splash' has no member named 'setWindowAttributes'

I have to import somthing?

Franzk

Oh, it's
@showSplash->setAttribute(Qt::WA_DeleteOnClose, true);@

Vetryaspa

I have just make but..... error: 'class Splash' has no member named 'setWindowAttributes'

:S no change

Franzk

Don't use setWindowAttributes, use setAttribute as I stated in my previous post.

Vetryaspa

ok now build but not show the screen... :(

but I have read something about GUI Thread, you know something about this?
I try to do the same metod to show Root?

Franzk

[quote author="Vetryaspa" date="1307691735"]1. but I have read something about GUI Thread, you know something about this?[/quote]I know something about the GUI thread, but I don't know enough about your code to see where this question becomes relevant.

[quote]2. I try to do the same metod to show Root?[/quote]Not necessary, since rootView stays in scope during the run of the application.

Vetryaspa

but the method to show the view is currect?

You have sample that I can See?

Vetryaspa

An idea: you have said that the splash are quickly destroyed, tha exist a metod where i can intercept the event of closing of the splash?

so I can control if it will be created or not....
whit destructor method [ ~Splash() ] I can see this

[Edit:] I have try and the destructor will not call

Franzk

I don't know the contents of your showFullScreen() function, so I don't have any further suggestions.

Vetryaspa

some sample?

goetz

Use the debugger and look when your classes are constructed, methods called and destroyed.

Vetryaspa

Volker I see when the constructor al call but if I put

@qDebug() << "Destruct"<<endl;@

in the ~Splash() distructor it was not show in the Application Output. then in theory it was not destroied?

goetz

If you use the pointer, then it's only destroyed when you call delete on it.

Problem could be caused by the not yet running event loop. You might want to try

@
app.processEvents();
// or
qApp->processEvents();
@

to work around this.

Did you try "QSplashScreen":http://doc.qt.nokia.com/4.7/qsplashscreen.html?

Vetryaspa

where I have to put your code? and what a have to write inside the processEvents(); metod?

then I control Qsplash

goetz

The sample is in QSplashScreen's documentation... have a look over there.

You are not required to write a processEvents() method, but to use the provided one...