How to send a Qt app to the background on Symbian

Comments

This code is working fine. I have implemented it and putting details here. by Dalason

I made changes

1. in .pro file - added code

   symbian: {
   TARGET.CAPABILITY += SwEvent
   LIBS += -lcone -leikcore -lws32
   }

2. added following line in .h file

   #include <e32base.h>
   #include <w32std.h>     // ws32.lib
   #include <apgwgnam.h>
   #include <coedef.h>
   #include <coecntrl.h>    // CCoeControl
   #include <coemain.h>

3. main.cpp is same as posted in article

   int main(int argc, char *argv[])
   {
       QApplication a(argc, argv);
       MainWindow w;
       w.show();
    
    
          int rc = 0;
          while (true)
          {
              rc = a.exec();
              w.showMaximized();
              RWindowGroup* wg = &CCoeEnv::Static()->RootWin();
              wg->SetOrdinalPosition(-1);
          }
    
       return a.exec();
   }

prob

This does not work in Nokia Qt SDK

Then how to make it work in Nokia Qt SDK?

Vinayppatil1989 - Worked

Why the hell i didnt found this post early... Goggling from past 17 hrs...

Thanks a lot.. Worked for me..

vinayppatil1989 22:25, 15 September 2011 (EEST)

Hamishwillee - You shouldn't need SwEvent capability

You only need SwEvent to set a priority of KPasswordWindowGroupPriority or greater. You may need Cone as indicated. Haven't tested.

hamishwillee 07:08, 7 March 2012 (EET)

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This code snippet demonstrates how to hide a Qt application in the background on Symbian, instead of allowing it to exit.

Article Metadata

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Article

Created: User:Wwwcitizen (10 Feb 2010)

Last edited: hamishwillee (11 Oct 2012)

Code

The way it works is that when the application is exited the exec() completes, and the app window is forced into the background and then re-executed. Symbian C++ code is used to force the app into the background.

Source file:

    MainWindow mainWindow();
    mainWindow.showMaximized();
    int rc = 0;
    while (true)
    {
        rc = a.exec();
        mainWindow.showMaximized();
        RWindowGroup* wg = &CCoeEnv::Static()->RootWin();
        wg->SetOrdinalPosition(-1);
    }

You need following linkage in your .pro file

symbian { 
     LIBS += -lws32\
             -lcone
   }