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POCan't close GUI program
 

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  1. POCan't close GUI program
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    <p>In my project, I have a dialog that displays that has two buttons. If someone presses "Yes" then I want the program to close. But I can't seem to get it to work.</p> <p>I have tried all of these.</p> <pre><code>qApp-&gt;exit(); qApp-&gt;quit(); QApplication::exit(); QApplication::quit(); QCoreApplication::exit(); QCoreApplication::quit(); </code></pre> <p>And none of these close the program. I tried moving them into my main.cpp, I tried making a second function just for closing, and nothing works.</p> <p>Would it have anything to do with my event loop earlier that checks for updates? If so, I will post it.</p> <p>EDIT:</p> <p>Here is my main.cpp and the function where I want my program to close:</p> <pre><code>#include "mainwindow.h" #include &lt;QApplication&gt; int main(int argc, char *argv[]) { Q_INIT_RESOURCE(icons); QApplication a(argc, argv); MainWindow w; w.show(); w.checkVersion(); return a.exec(); } </code></pre> <p>Function:</p> <pre><code>void MainWindow::checkVersion() { if((version != "1.0.0") &amp;&amp; (version != ""))//version is a string that is filled when the mainwindow first opens. { QMessageBox::StandardButton reply; reply = QMessageBox::question(this, "Update", "Version " + version + " is now available. Would you like to update now?\n\nOr visit http://www.youtube.com/oPryzeLP to download manually.", QMessageBox::Yes | QMessageBox::No); if(reply == QMessageBox::Yes) { } QApplication::exit();//moved out of reply just to test closing } } </code></pre> <p>This is the function that contains the event loop:</p> <pre><code>void MainWindow::downloadFile(const QString &amp;url, const QString &amp;aPathInClient) { QNetworkAccessManager* m_NetworkMngr = new QNetworkAccessManager(this); QNetworkReply *reply = m_NetworkMngr-&gt;get(QNetworkRequest(QUrl(url))); QEventLoop loop; connect(reply, SIGNAL(finished()), &amp;loop, SLOT(quit())); loop.exec(); QUrl aUrl(url); QFileInfo fileInfo=aUrl.path(); QFile file(aPathInClient+"\\"+fileInfo.fileName()); file.open(QIODevice::WriteOnly); file.write(reply-&gt;readAll()); delete reply; loop.quit(); } </code></pre> <p>This is the function that calls downloadFile():</p> <pre><code>MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui-&gt;setupUi(this); downloadFile("link", "stuff"); QFile info("stuff\\info.txt"); if(info.open(QIODevice::ReadOnly)) { QTextStream in(&amp;info); while(!in.atEnd()) { version = in.readLine(); versionLink = in.readLine(); vidLink = in.readLine(); } } info.close(); setCentralWidget(ui-&gt;tabWidget); ui-&gt;creativeFlag-&gt;setEnabled(false); ui-&gt;structures-&gt;setEnabled(false); ui-&gt;raining-&gt;setEnabled(false); ui-&gt;thundering-&gt;setEnabled(false); ui-&gt;hardcore-&gt;setEnabled(false); AddSlotsToGroup(); AddBlocksToGroup(); QPalette palette = ui-&gt;blockFrame-&gt;palette(); palette.setColor( backgroundRole(), QColor( 139, 139, 139 ) ); ui-&gt;blockFrame-&gt;setPalette( palette ); ui-&gt;blockFrame-&gt;setAutoFillBackground( true ); QPixmap map_bg(":/images/mapbg.png"); ui-&gt;mapBgLabel-&gt;setPixmap(map_bg.scaled(224, 224, Qt::IgnoreAspectRatio, Qt::FastTransformation)); QShortcut *returnShortcut = new QShortcut(QKeySequence("Return"), ui-&gt;tab_4); QObject::connect(returnShortcut, SIGNAL(activated()), ui-&gt;blockFind, SLOT(click())); } </code></pre>
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    1. USmrg95
    1. USmrg95
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      1. VTDownMod
    1. COPost a minimum test case that reproduces the problem. Put all the code into one file (main.cpp, for both class declarations and implementation). You can `#include "main.moc"` at the end if you have any `Q_OBJECT` macros within.
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      1. USKuba Ober
    2. CODo you call app.exec() before dialog.exec(), or is the dialog opened directly in main()?
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      1. USFrank Osterfeld
    3. COI will update the post with my main.cpp and the function where I was it to close.
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      1. USmrg95
 

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