qt - Crash/misfunction of QFileDialog in debug builds -


i know post quite old, i'm experiencing same kind of problem.

i'm using qt 4.6 on windows 7 64 bits, application built visual studio 2008.

i have same kind of use of qfiledialog class. in slot of 1 of widgets try open "browse window" select file open.

i've tried combinations of following:

  • native vs. qfiledialog instance on stack vs. qfiledialog instance on heap.
  • "parent" parameter set null vs. vs. mainwindow

  • qfiledialog::dontusenativedialog set true or false

    const int cfile_open_dlg_type = 0; #define file_open_dlg_parent null //#define file_open_dlg_parent //#define file_open_dlg_parent mmainwindow const bool cfile_open_dlg_native = false;  void vgqtmodelwidget::on_mbrowsebutton_clicked() {     qstring lfilepath;     qfiledialog::options loptions = (cfile_open_dlg_native ? qfiledialog::dontusenativedialog : 0);     if (cfile_open_dlg_type == 0) // heap allocated dialog     {         qfiledialog* lfiledlg  = new qfiledialog (file_open_dlg_parent);         lfiledlg->setoptions(loptions);         lfiledlg->setwindowtitle(tr("open model"));         lfiledlg->setfilter(tr("model file (*.vsg4)"));         if (!lfiledlg->exec() || !lfiledlg->selectedfiles().size())         {             delete lfiledlg;             return;         }         lfilepath = lfiledlg->selectedfiles().at(0);         delete lfiledlg;     }     else if (cfile_open_dlg_type == 1) // stack allocated version     {         qfiledialog lfiledlg (file_open_dlg_parent);         lfiledlg.setoptions(loptions);         lfiledlg.setwindowtitle(tr("open model"));         lfiledlg.setfilter(tr("model file (*.vsg4)"));         if (!lfiledlg.exec() || !lfiledlg.selectedfiles().size())         {             return;         }         lfilepath = lfiledlg.selectedfiles().at(0);     }     else     {         lfilepath = qfiledialog::getopenfilename(file_open_dlg_parent,tr("open model file"), tr("."), tr("model file (*.vsg4)"), 0, loptions);     }     qfile lfile (lfilepath);     if (lfile.exists())     {         // file...     } }

this works flawless in release builds, on debug builds here results:

heap allocated dialog

all versions (native/non-native, parent=this/parent=null) crash.

stack allocated dialog

all versions (native/non-native, parent=this/parent=null) crash.

static helper

  • native, whichever parent: getopenfilename returns empty string without showing
  • native, whichever parent: crash

thing is, when crash, ugly one, call stack messed up. looks kind debug/non-debug mixup, have double-checked qt_debug defined , link debug libraries qt.

anyone has clue ?


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