Databases
StackOverflow2013
Postsdbo
POHow do I quit a qt console application? Are there criterions for the QApplication::quit() slot to work?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow do I quit a qt console application? Are there criterions for the QApplication::quit() slot to work?
    primarykey
    data
    text
    <p>I have a weird qt problem: My application doesn't quit in some configurations. </p> <p>The idea is to have a program, which can be started as a program with a GUI (through <code>myWindow</code>) or as a pure console application (controlled via <code>myConsole</code>, which runs its own loop in its thread to record keyboard inputs). Either way quitting is done by calling the <code>myObject</code> slot <code>quitMyObject</code>, which in turn cleans up some objects and emits the signal <code>signalQuitapplication</code>, which is connected to the <code>QApplication</code> (<code>app</code>) <code>quit</code> slot.</p> <p>Unfortunately the application only quits when the the window is enabled and the quit command is entered in the console (although the <code>slotQuitMyObject</code> of <code>myObject</code> is always called). So I wonder what criterions Qt has to actually quit the main event loop and exit the program.</p> <p>The code looks like this:</p> <pre><code>int main(int argc, char *argv[]) { bool enableWindow = false; QApplication app(argc, argv, enableWindow); MyUiAbstract* myConsole = new ConsoleUi(); // ConsoleUi inherits from MyUiAbstract, which inherits from QThread MyWindow* myWindow = NULL; // MyWindow inherits from QMainWindow if(enableWindow) { myWindow = new MyWindow(); myWindow-&gt;show(); } MyObject* myObject = new MyObject(myConsole, myWindow, ...); QObject::connect(myObject, SIGNAL(signalQuitQApplication()), &amp;app, SLOT(quit()), Qt::QueuedConnection); QObject::connect(myConsole, SIGNAL(signalQuitMyObject()), myObject, SLOT(slotQuitMyObject()), Qt::QueuedConnection); QObject::connect(myWindow, SIGNAL(signalQuitMyObject()), myObject, SLOT(slotQuitMyObject()), Qt::QueuedConnection); QObject::connect(myWindow, SIGNAL(signalQuitConsoleUI()), myConsole, SLOT(slotQuitMyUi()), Qt::QueuedConnection); return app.exec(); } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USLol4t0
    1. USenam
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. CODoes all your connections succeed? You will see warnings in runtime, if any failed.
      singulars
      1. POHow do I quit a qt console application? Are there criterions for the QApplication::quit() slot to work?
      1. USLol4t0
    2. COwellll, there was a typo `signalQuitQApplication` vs `signalQuitApplication`, that hurt... now the only non-working thing is quitting the program from the GUI (strangely enough it works, if the debugger is on).
      singulars
      1. POHow do I quit a qt console application? Are there criterions for the QApplication::quit() slot to work?
      1. USenam
    3. COOk, I figured out the second bug: a call to `getline(...)` blocked the console thread... I 'brutally' solved this by terminating the thread, as there doesn't seem to be a simple and clean solution (s.o. else had that problem http://stackoverflow.com/questions/6408584/problem-with-getline-and-threads). The window is only for testing, so I think this is ok...
      singulars
      1. POHow do I quit a qt console application? Are there criterions for the QApplication::quit() slot to work?
      1. USenam
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload