c++ - Missing functionalities when deploying Qt application -


i have created deploy folder qt gui application, have added .dll's screamed for. app running, there 2 functionalities missing. 

void mainwindow::on_action_about_triggered() {     qstring filepatch = qapplication::applicationdirpath() + "/changelog.txt";     qfile f(filepatch);     if (!f.open(qfile::readonly | qfile::text))         return;      qtextstream in(&f);     qmessagebox::about(this, tr("about testapp"),                 getappversion() + "\ntestapp\n\n" + in.readall()); }

and

qprinter printer;     printer.setfullpage(true);     printer.setpapersize(qprinter::a4);     printer.setorientation(qprinter::landscape);      if (specialtypes::printtype_t::eprint == ptype)     {         printer.setoutputformat(qprinter::nativeformat);          qprintdialog printdial(&printer, this);         if (printdial.exec() == qdialog::accepted)         {             textedit->document()->print(&printer);         }     }

both dialogs not showing on computer deploy folder. when run in qt creator on pc building app on, dialogs work properly. gues need include additional libraries, have no idea ones, app doesnt throw error, doesnt show dialogs. aprichiate help.

your problems have nothing libraries.

the first method, obviously, returns here:

if (!f.open(qfile::readonly | qfile::text))     return;

the second 1 doesn't inside of

if (specialtypes::printtype_t::eprint == ptype)

with first 1 i'd recommend print log file name, and, if case, change code this:

qdir dir(qapplication::applicationdirpath()); qfile f(dir.absolutefilepath("changelog.txt"));

if problem isn't connected file path, should check file's permissions. , write this:

if (!f.open(qfile::readonly | qfile::text)) {     qdebug() << "error opening file. error code =" << f.error();     return; }

for second 1 should add:

} else {     qdebug() << "specialtypes::printtype_t::eprint != ptype"; }

unfortunatelly, haven't provided enough data on second error, , can't tell real reason it.


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