QTableWidget Drag and Drop works only once

UnitScan

I made a QTableWidget subclass so can accept drag'n drop from external file. The only problem is accept the drag n drop only the first time: after this, it seems not works anymore.

This is the subclass:

Header

#include <QWidget>
#include <QTableWidget>
#include <QDropEvent>
#include <QDragMoveEvent>
#include <QDropEvent>
#include <QMimeData>
#include <QDebug>

#ifndef DTABLEWIDGET_H
#define DTABLEWIDGET_H

class DTableWidget : public QTableWidget
{
    Q_OBJECT
protected:
    void dragMoveEvent(QDragEnterEvent *e);
    void dropEvent(QDropEvent *event);
public:
    explicit DTableWidget(QWidget *parent = 0);

    ~DTableWidget();

public slots:

private:

private slots:

};

#endif // DTABLEWIDGET_H

Source

#include <dtablewidget.h>
#include <QDrag>
#include <QDragEnterEvent>
#include <QMouseEvent>
#include <QApplication>
DTableWidget::DTableWidget(QWidget *parent) :
    QTableWidget(parent)
{
    setAcceptDrops(true);
}

DTableWidget::~DTableWidget()
{
}

void DTableWidget::dragMoveEvent(QDragEnterEvent *e)
{
   e->acceptProposedAction();

}

void DTableWidget::dragEnterEvent(QDragEnterEvent *e)
{
   e->acceptProposedAction();
}

void DTableWidget::dropEvent(QDropEvent *e)
{
    QList<QUrl> urls = e->mimeData()->urls();
        foreach(QUrl url, urls)
        {
            qDebug()<<url.toString();
        }
}

Any solution?

raven-worx

@UnitScan

void DTableWidget::dragMoveEvent(QDragEnterEvent *e)
{
...
}

this method has the wrong signature. Thus it should never get called and thus the drag not accepted.

In case you are using a C++11 compatible compiler (and Qt5) you should add Q_DECL_OVERRIDE macro at the end of all overrriding methods to avoid such mistakes.

virtual void DTableWidget::dragMoveEvent(QDragMoveEvent *e) Q_DECL_OVERRIDE;

In case there is something wrong, and you are not overriding anything the compiler will generate an error.