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    Crash in takeChild() while deleting a QTreeWidgetItem

    General and Desktop
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    • T
      tobias.hunger last edited by

      Could you please use the code tags to format your code sections? It is hardly readable the way it is printed now!

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      • T
        thorbjorn last edited by

        This might have something to do with @modelTree->blockSignals(true);@, which I guess could cause the view not to be entirely aware of the child removals, but I'm not sure. In any case this forum is not the proper place to report bugs, you should use "http://bugreports.qt.nokia.com/":http://bugreports.qt.nokia.com/ for that.

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        • L
          LAXMIU last edited by

          .

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            LAXMIU last edited by

            Hi,
            I tried removing blockSignals from the deleteCurrent functionality , but it did not work out.

            Thanks, Laxmi

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              LAXMIU last edited by

              .

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                LAXMIU last edited by

                .

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                • D
                  DenisKormalev last edited by

                  LAXMIU, I've added highlighting to your code, please don't forget to use it by yourself in future :)

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                  • A
                    alexander last edited by

                    why do you use takeChild()?
                    try only delete item

                    @void ModelForm::deleteCurrent() {
                    QList<QTreeWidgetItem *> itemList = modelTree->selectedItems();
                    for(int i= 0; i <itemList.size(); i++) {
                    if(itemList.at(i) != NULL && itemList.at(i)->parent() != NULL) {
                    QTreeWidgetItem *c=itemList.at(i);
                    QTreeWidgetItem p = c->parent();
                    delete c;
                    }
                    }
                    //now select the current item
                    QTreeWidgetItem                     curItem = modelTree->currentItem();
                    if(curItem){
                    modelTree->setItemSelected(curItem, true);
                    }
                    }@

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                    • L
                      LAXMIU last edited by

                      Hi Alexander,

                      I tried removing takeChild too, the crash now coming in the destructor of QTreeWidgetItem as follows:

                      #0 0x00270823 in QPersistentModelIndex::operator QModelIndex const& ()
                      from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtCore.so.4
                      #1 0x0120539f in QAbstractItemView::updateEditorGeometries () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtGui.so.4
                      #2 0x011f6dd2 in QAbstractItemViewPrivate::_q_rowsRemoved () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtGui.so.4
                      #3 0x0123deaa in QTreeViewPrivate::rowsRemoved () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtGui.so.4
                      #4 0x0123e4eb in QTreeView::rowsAboutToBeRemoved () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtGui.so.4
                      #5 0x01202865 in QAbstractItemView::qt_metacall () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtGui.so.4
                      #6 0x012492ba in QTreeView::qt_metacall () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtGui.so.4
                      #7 0x0128212a in QTreeWidget::qt_metacall () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtGui.so.4
                      #8 0x00291583 in QMetaObject::activate () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtCore.so.4
                      #9 0x002921e2 in QMetaObject::activate () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtCore.so.4
                      #10 0x002cb7ff in QAbstractItemModel::rowsAboutToBeRemoved () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtCore.so.4
                      #11 0x00272965 in QAbstractItemModel::beginRemoveRows () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtCore.so.4
                      #12 0x0127f4c6 in QTreeModel::beginRemoveItems () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtGui.so.4
                      #13 0x0127f6b0 in QTreeWidgetItem::~QTreeWidgetItem () from /net/ciclnx11d/export/home/laxmi/PERFORCE/DEL/lnx86/tools/Qt/32bit/lib/libQtGui.so.4
                      #14 0x0804c7da in ModelForm::deleteCurrent (this=0x857ff60) at ModelForm.cpp:179

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                        LAXMIU last edited by

                        [quote author="Denis Kormalev" date="1285753913"]LAXMIU, I've added highlighting to your code, please don't forget to use it by yourself in future :)[/quote]

                        Hi Denis,
                        Please let me know the procedure/steps of highlighting the code. I really don't know. I am new to this forum. I could not either find any icon above for doing so.

                        Thanks andregards,
                        Laxmi

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                        • ?
                          Guest last edited by

                          just enclose only your code with the @ tag ... one before and one after your code :)

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                          • T
                            tobias.hunger last edited by

                            LAXMIU: ... or just mark the code with your mouse and click on the second icon from the right (the one with the tooltip "Code").

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                            • T
                              tobias.hunger last edited by

                              This thread kind of reminds me of computer magazines in the early 80ties...

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                              • D
                                DenisKormalev last edited by

                                [quote author="Tobias Hunger" date="1286270859"]This thread kind of reminds me of computer magazines in the early 80ties...[/quote]

                                A lot of code and small amount of text?:)

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                                • L
                                  LAXMIU last edited by

                                  I have removed unnecessary repetition of code from the thread.
                                  Hopefully its readable now.

                                  Thanks,
                                  Laxmi

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                                  • ?
                                    Guest last edited by

                                    ok laxmi, I copied all the code and tried on Qt 4.7, no crashes ... any specific reason you are still on Qt 4.5.x ?

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                                      LAXMIU last edited by

                                      Thanks a lot Chetan,

                                      We have migrated from 4.4.1 to 4.5.3 in one of our product releases. Hopefully, we will be getting the latest Qt version attached for our next product release.

                                      May I get any pointer that its actually a bug in Qt 4.5.3?
                                      Have you been able to reproduce the crash in Qt 4.5.3? (If thats available with you)

                                      Thanks,
                                      Laxmi

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                                        LAXMIU last edited by

                                        "Qt 4.5.3 bug filed for this issue":http://bugreports.qt.nokia.com/browse/QTBUG-14572

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                                          Guest last edited by

                                          hi laxmi, can u convert it to a link

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                                          • L
                                            LAXMIU last edited by

                                            Hi Chetan, I did .

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