QTableWidget: Strange row selection after changing item while sorting is enabled

[Tobi2504]

Hi guys,

i have a QTableWidget with a few (in my case 5) columns and following properties:
- Select Row
- Sorting Enabled

When the table is sorted in the first column and I change the content an item of the first column, the row changes to the new position in the sorting order but the selection for some rows stays on the same row number as before. (see picture)

Capture.JPG

After a few tests with different column numbers I saw, that only the first and the last column selection will change. When I click on any item, the selection goes to the normal behavior.

Does somebody have the idea to fix the problem?

Thanks,
Tobi

[wysota]

Please provide a minimal compilable example reproducing the problem.

[Tobi2504]

Hi,
here is a minimal example that produces the described issue. Btw I'm using Qt 5.4.1.

main.cpp

#include "mainwindow.h"
#include <QApplication>
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
 
    return a.exec();
}

#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

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mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
#include <QTableWidget>
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();
 
private:
    QTableWidget *table;
};
 
#endif // MAINWINDOW_H

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QTableWidget>

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();

private:
    QTableWidget *table;
};

#endif // MAINWINDOW_H

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mainwindow.cpp

#include "mainwindow.h"
 
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    setFixedSize(550,200);
 
 
    // Setup Table
    table = new QTableWidget(this);
    table->setColumnCount(5);
    table->setRowCount(5);
    table->setSelectionMode(QAbstractItemView::SingleSelection);
    table->setSelectionBehavior(QAbstractItemView::SelectRows);
    table->setSortingEnabled(true);
 
    // filling the table
    for(int i=0; i<table->rowCount(); i++)
        table->setItem(i,0,new QTableWidgetItem(QString::number(i+1)));
 
    // sort table
    table->sortByColumn(0,Qt::AscendingOrder);
 
    // Add table to window widget
    setCentralWidget(table);
}
 
MainWindow::~MainWindow()
{
    delete table;
}

#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    setFixedSize(550,200);


    // Setup Table
    table = new QTableWidget(this);
    table->setColumnCount(5);
    table->setRowCount(5);
    table->setSelectionMode(QAbstractItemView::SingleSelection);
    table->setSelectionBehavior(QAbstractItemView::SelectRows);
    table->setSortingEnabled(true);

    // filling the table
    for(int i=0; i<table->rowCount(); i++)
        table->setItem(i,0,new QTableWidgetItem(QString::number(i+1)));

    // sort table
    table->sortByColumn(0,Qt::AscendingOrder);

    // Add table to window widget
    setCentralWidget(table);
}

MainWindow::~MainWindow()
{
    delete table;
}

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When I change the number in the first cell from 1 to 6 I got the selection problem.

[Santosh Reddy]

I think it is a bug.

I tried to change other column and row data randomly the app crashes with this message

ASSERT failure in QPersistentModelIndex::~QPersistentModelIndex: "persistent model indexes corrupted", file itemmodels\qabstractitemmodel.cpp, line 556