Drop on table and widget

[core_st]

Hi! I have Widget MainWindow and tableWidget in MainWindow. tableWidget is placed in the center of MainWindow. I need drop audio-files on Main Window. If i drop files to MainWindow then do such function, if i drop files on table - do another function. Can you help me?

i try to realize drop on mainWindow:
in header:

void dragEnterEvent (QDragEnterEvent *pe){
        if (pe->mimeData()->hasFormat("text/uri-list")){
        pe->acceptProposedAction();
        }
    }
    void dropEvent (QDropEvent* pe);

void dragEnterEvent (QDragEnterEvent *pe){
        if (pe->mimeData()->hasFormat("text/uri-list")){
        pe->acceptProposedAction();
        }
    }
    void dropEvent (QDropEvent* pe);

To copy to clipboard, switch view to plain text mode 

in constructor

setAcceptDrops(true);

setAcceptDrops(true);

To copy to clipboard, switch view to plain text mode 

and

void MainWindow::dropEvent(QDropEvent *pe){
        QList<QUrl> urlList=pe->mimeData()->urls();
        QStringList str;
        foreach (QUrl url, urlList ){
        str<<url.toString();
        QMessageBox::information(this,"yeah",url.toString());
        }
  //   Some function with str
    }

void MainWindow::dropEvent(QDropEvent *pe){
        QList<QUrl> urlList=pe->mimeData()->urls();
        QStringList str;
        foreach (QUrl url, urlList ){
        str<<url.toString();
        QMessageBox::information(this,"yeah",url.toString());
        }
  //   Some function with str
    }

To copy to clipboard, switch view to plain text mode 

But i have crash on drop.

[battersea]

Comment out lines until the crash goes away. That way you know where things are going wrong...

My drop event (to add single files) looks as follows:

void dropEvent(QDropEvent* event) {
	QString filePath;
	if (event->mimeData()->hasFormat( "text/uri-list" )) {
		QList<QUrl> urls = event->mimeData()->urls();
		if (urls.isEmpty()) {
			return;
		}
		if(urls.size()>1) {
			return;
		}
		filePath = urls.first().toLocalFile();
		if(filePath.isEmpty()) {
			return;
		}
	}
        // do something with filePath
}

void dropEvent(QDropEvent* event) {
	QString filePath;
	if (event->mimeData()->hasFormat( "text/uri-list" )) {
		QList<QUrl> urls = event->mimeData()->urls();
		if (urls.isEmpty()) {
			return;
		}
		if(urls.size()>1) {
			return;
		}
		filePath = urls.first().toLocalFile();
		if(filePath.isEmpty()) {
			return;
		}
	}
        // do something with filePath
}

To copy to clipboard, switch view to plain text mode 

[janorcutt]

you could use the model/view framework built in to qt to accept the dropped data into a model. you would have to subclass QStandardItemModel and override the drag/drop functions, then you just need to tell the view to use that model. here is some code modified from the Bangarang project...

bool MusicItemModel::dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent)
{
    if (action == Qt::IgnoreAction)
        return true;
 
    if (!data->hasFormat("text/uri-list"))
        return false;
 
    if (column > 0)
        return false;
 
    int beginRow;
 
    if (row != -1) {
        beginRow = row;
    } else if (parent.isValid()) {
        beginRow = parent.row();
    } else {
        beginRow = rowCount(QModelIndex());
    }
 
    QList<QUrl> urls = data->urls();
 
    bool internalMove = false;
    QStringList rowsToMove;
    if (data->text().startsWith("Row:")) {
        rowsToMove = data->text().split(",", QString::SkipEmptyParts);
        internalMove = true;
    }
 
    QList<MusicItem> itemsInserted;
    int insertionRow = beginRow;
    for (int i = 0; i < urls.count(); i++) {
        if (internalMove) {
            QString rowEntry = rowsToMove.at(i);
            int rowToMove = rowEntry.remove("Row:").toInt();
            MusicItem item = itemAt(rowToMove);
            itemsInserted << item;
            QList<QStandardItem *> rowItems = getRowData(item);
            insertRow(insertionRow, rowItems);
            insertionRow = insertionRow + 1;
        } else {
            QString url = urls.at(i).toString();
            if (QFile::exists(url)) {
                MusicItem item = Convenience::itemFromUrl(url);
                itemsInserted << item;
                QList<QStandardItem *> rowItems = getRowData(item);
                insertRow(insertionRow, rowItems);
                insertionRow = insertionRow + 1;
            }
        }
    }
 
    insertionRow = beginRow;
    foreach (MusicItem item, itemsInserted) {
        int i = rowFromItemUrl(item.Url);
        m_musiclist.insert(insertionRow, item);
        m_urllist.insert(insertionRow, item.Url);
        if (i != -1){
            m_musiclist.removeAt(i);
            m_urllist.removeAt(i);
        }
        insertionRow = insertionRow + 1;
 
    }
    return true;
}
 
Qt::ItemFlags MusicItemModel::flags(const QModelIndex &index) const
{
    Qt::ItemFlags defaultFlags = Qt::ItemIsSelectable | Qt::ItemIsEnabled;
 
    if (index.isValid()) {
        return Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled | defaultFlags;
    } else {
        return Qt::ItemIsDropEnabled | defaultFlags;
    }
}
 
QMimeData* MusicItemModel::mimeData(const QModelIndexList &indexes) const
{
    QMimeData *mimeData = new QMimeData();
        QList<QUrl> urls;
        QString indexList;
        foreach (QModelIndex index, indexes) {
            if (index.isValid() && index.column() != 1) {
                QUrl url = QUrl(data(index, MusicItem::UrlRole).toString());
                urls << url;
                indexList += QString("Row:%1,").arg(index.row());
            }
        }
 
        mimeData->setUrls(urls);
        mimeData->setText(indexList);
        return mimeData;
}
 
QStringList MusicItemModel::mimeTypes() const
{
    QStringList types;
    types << "text/uri-list" << "text/plain";
    return types;
}
 
Qt::DropActions MusicItemModel::supportedDropActions() const
{
    return Qt::MoveAction;
}

bool MusicItemModel::dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent)
{
    if (action == Qt::IgnoreAction)
        return true;

    if (!data->hasFormat("text/uri-list"))
        return false;

    if (column > 0)
        return false;

    int beginRow;

    if (row != -1) {
        beginRow = row;
    } else if (parent.isValid()) {
        beginRow = parent.row();
    } else {
        beginRow = rowCount(QModelIndex());
    }

    QList<QUrl> urls = data->urls();

    bool internalMove = false;
    QStringList rowsToMove;
    if (data->text().startsWith("Row:")) {
        rowsToMove = data->text().split(",", QString::SkipEmptyParts);
        internalMove = true;
    }

    QList<MusicItem> itemsInserted;
    int insertionRow = beginRow;
    for (int i = 0; i < urls.count(); i++) {
        if (internalMove) {
            QString rowEntry = rowsToMove.at(i);
            int rowToMove = rowEntry.remove("Row:").toInt();
            MusicItem item = itemAt(rowToMove);
            itemsInserted << item;
            QList<QStandardItem *> rowItems = getRowData(item);
            insertRow(insertionRow, rowItems);
            insertionRow = insertionRow + 1;
        } else {
            QString url = urls.at(i).toString();
            if (QFile::exists(url)) {
                MusicItem item = Convenience::itemFromUrl(url);
                itemsInserted << item;
                QList<QStandardItem *> rowItems = getRowData(item);
                insertRow(insertionRow, rowItems);
                insertionRow = insertionRow + 1;
            }
        }
    }

    insertionRow = beginRow;
    foreach (MusicItem item, itemsInserted) {
        int i = rowFromItemUrl(item.Url);
        m_musiclist.insert(insertionRow, item);
        m_urllist.insert(insertionRow, item.Url);
        if (i != -1){
            m_musiclist.removeAt(i);
            m_urllist.removeAt(i);
        }
        insertionRow = insertionRow + 1;

    }
    return true;
}

Qt::ItemFlags MusicItemModel::flags(const QModelIndex &index) const
{
    Qt::ItemFlags defaultFlags = Qt::ItemIsSelectable | Qt::ItemIsEnabled;

    if (index.isValid()) {
        return Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled | defaultFlags;
    } else {
        return Qt::ItemIsDropEnabled | defaultFlags;
    }
}

QMimeData* MusicItemModel::mimeData(const QModelIndexList &indexes) const
{
    QMimeData *mimeData = new QMimeData();
        QList<QUrl> urls;
        QString indexList;
        foreach (QModelIndex index, indexes) {
            if (index.isValid() && index.column() != 1) {
                QUrl url = QUrl(data(index, MusicItem::UrlRole).toString());
                urls << url;
                indexList += QString("Row:%1,").arg(index.row());
            }
        }

        mimeData->setUrls(urls);
        mimeData->setText(indexList);
        return mimeData;
}

QStringList MusicItemModel::mimeTypes() const
{
    QStringList types;
    types << "text/uri-list" << "text/plain";
    return types;
}

Qt::DropActions MusicItemModel::supportedDropActions() const
{
    return Qt::MoveAction;
}

To copy to clipboard, switch view to plain text mode 

hope it helps