[SOLVED] QListWidget InternalMove adds children



  • Hey there,

    I experienced a strange behavior of my QListWidget. Therefore I prepared this example.

    listwidget.h:
    @
    #ifndef LISTWIDGET_H
    #define LISTWIDGET_H

    #include <QListWidget>
    #include <QDebug>

    class ListWidget : public QListWidget
    {
    Q_OBJECT

    public:
    ListWidget(QWidget *parent = 0);

    public slots:
    void rowsMoved(QModelIndex,int,int,QModelIndex,int);
    };

    #endif // LISTWIDGET_H
    @

    listwidget.cpp:

    @
    #include "listwidget.h"

    ListWidget::ListWidget(QWidget *parent)
    : QListWidget(parent)
    {
    this->addItem("Item 1");
    this->addItem("Item 2");

    this->setDragDropMode( QAbstractItemView::InternalMove );
    
    connect( this->model(),
             SIGNAL(rowsMoved(QModelIndex,int,int,QModelIndex,int)),
             this,
             SLOT(rowsMoved(QModelIndex,int,int,QModelIndex,int)));
    

    }

    void ListWidget::rowsMoved(QModelIndex,int,int,QModelIndex,int)
    {
    qDebug() << this->children().count();
    }
    @

    If I start this and move the two items around, every time the children count raises by one. Is this expected behaviour? If yes, could someone explain me why?


  • Lifetime Qt Champion

    Hi,

    It doesn't look like an expected behavior. What version of Qt are you using ?



  • Hey, I'm using Qt 5.2.1.


  • Lifetime Qt Champion

    Sorry for the late reply

    Can you try again with 5.3 ?

    If this still happens, then have a look at the "bug report system":http://bureports.qt-project.org to see if it's something known. If not please open a new report providing a minimal compilable example that shows the behavior



  • Tried it with 5.3, still the same. Search for a while at the "bug report system":bugreports.qt-project.org but didn't find anything related to this. Therefore I openend a new "report":https://bugreports.qt-project.org/browse/QTBUG-39651.

    I hope I did this the right way, as it is the first time I reported something.


  • Lifetime Qt Champion

    It's missing the pro file and it'll be nicer in a compressed archive (e.g. zip), otherwise, looks good :)


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