通过QT（或：将QTextDocument写入剪贴板）将（rtf）表复制到剪贴板中

Question

我需要我的QT应用程序来创建表并将此表复制到剪贴板，以便它可以作为表粘贴到libreoffice Writer或MS Word以后。

我的第一个方法是为表创建的HTML代码，并将其与

QClipboard *clipboard = QApplication::clipboard(); 
QMimeData *mimeData = new QMimeData(); 
mimeData->setData("text/html", html.toUtf8()); 
clipboard->setMimeData(mimeData, QClipboard::Clipboard); 

这种做法没有奏效插入到剪贴板。粘贴时，将表格单元格相互追加并插入而不进行格式化。

我的第二种方法使用RTF：

QTextDocument rtfDocument; 
rtfDocument.setHtml(html); 

但是我发现没有办法这个另外，QTextDocument复制到剪贴板。有没有？ 如果我能得到的RTF码出另外，QTextDocument的，我可以用一个办法像

QClipboard *clipboard = QApplication::clipboard(); 
QMimeData *mimeData = new QMimeData(); 
mimeData->setData("text/rtf", rtfDocument.getCode()); 
clipboard->setMimeData(mimeData, QClipboard::Clipboard); 

但我也没有找到一个函数返回的RTF代码。

编辑：

有了上次的代码框上方我有一个工作方式，以RTF代码复制到剪贴板。因此，任何可以创建代表表格的RTF代码的解决方案都可以解决我的问题。

Answer 1

你可以尝试使用QTextDocument::toHtml()和设置MIME类型为text/html

Answer 2

我在gedit 1[tab space]2[tab space]3\n4[tab space]5[tab space]6中写道，并将其复制到电子表格中，并且工作正常。所以，我认为如果你使用“\ t”来分隔行，使用“\ n”来分隔行，它会起作用。

Answer 3

我不确定数据的来源是什么，但这里是我们用来将正常QTableView子类化以使其可复制的代码。一些代码已被删除，但你可以得到基本的想法。 RTF/HTML是矫枉过正的 - 所有电子表格都接受良好的'CSV'。

当然，如果您需要格式化，此答案根本无济于事。我不清楚你的问题，如果这是一个需求与否。

// Escapes a string according to RFC-4180 specification. 
static QString csvEscape(const QString &value) { 
    if (value.contains(QRegExp(QLatin1String("[\"\\n\\r,]")))) { 
    QString escaped(value); 
    escaped.replace(QLatin1String("\""), QLatin1String("\"\"")); 
    return QString::fromLatin1("\"%1\"").arg(escaped); 
    } else { 
    return value; 
    } 
} 

void ClipboardAwareTableView::Copy() const { 
    QModelIndexList indexes = selectedIndexes(); 

    Q_ASSERT(!indexes.isEmpty()); 
    if(indexes.isEmpty()) { 
    return; 
    } 

    // The default sort is by rows then columns. This is what we want. 
    qSort(indexes); 

    // Remember the mapping between model columns and visible columns. This is 
    // local instead of an instance member because it would need to be invalidated 
    // any time a column is added, removed, or moved. The minor performance hit 
    // is worth the simplicity. 
    QHash<int, int> map_cache; 

    // Before we start exporting text, we have to know the index of the left- 
    // most column in our selection range so we can add the appropriate number 
    // of column separators. 
    int minimum_column = GetViewColumnIndex(indexes.first().column(), &map_cache); 
    for (int i = 1; i < indexes.size(); ++i) { 
    minimum_column = 
     qMin(minimum_column, 
      GetViewColumnIndex(indexes.at(i).column(), &map_cache)); 
    } 

    // Keep track of the previous index so that we know if we need a new line and 
    // how many column separators to insert. We start with an invalid index. 
    QModelIndex previous; 

    QString text; 

    for (int i = 0; i < indexes.size(); ++i) { 
    QModelIndex current = indexes.at(i); 

    // Do we need to add a new line character? 
    if (previous.isValid() && current.row() != previous.row()) { 
     text.append(QLatin1String("\n")); 
    } 

    // Are we on a new line? 
    if (!previous.isValid() || current.row() != previous.row()) { 
     // Add enough separators to get from the minimum to the current column. 
     text.append(QString::fromLatin1(",") 
        .repeated(GetViewColumnIndex(current.column(), &map_cache) - 
          minimum_column)); 
    } else { 
     // Add enough separators to get from the previous to the current column. 
     text.append(QString::fromLatin1(",") 
        .repeated(GetViewColumnIndex(current.column(), &map_cache) - 
          GetViewColumnIndex(previous.column(), &map_cache))); 
    } 

    // Append the text. If the column delegate is a QStyledItemDelegate, we use 
    // the display text. 
    QStyledItemDelegate *delegate = 
     qobject_cast<QStyledItemDelegate*>(
      itemDelegateForColumn(current.column())); 
    if (delegate) { 
     text.append(csvEscape(delegate->displayText(current.data(), QLocale()))); 
    } else { 
     text.append(csvEscape(current.data().toString())); 
    } 

    previous = current; 
    } 

    qApp->clipboard()->setText(text); 
} 

int ClipboardAwareTableView::GetViewColumnIndex(
    int model_column_index, 
    QHash<int, int> *cached_mappings) const { 
    if (cached_mappings->contains(model_column_index)) { 
    return cached_mappings->value(model_column_index); 
    } 

    int view_index = 0; 
    for (int i = 0; i < model()->columnCount(); ++i) { 
    if (model_column_index == i) { 
     cached_mappings->insert(model_column_index, view_index); 
     return view_index; 
    } else if (!isColumnHidden(i)) { 
     ++view_index; 
    } 
    } 

    throw std::invalid_argument("model_column_index was out of range."); 
} 

void ClipboardAwareTableView::keyPressEvent(QKeyEvent *event) { 
    if (event->matches(QKeySequence::Copy) && !selectedIndexes().isEmpty()) { 
    Copy(); 
    event->accept(); 
    return; // The base class implementation will overwrite the clipboard. 
    } 

    event->ignore(); 
    QTableView::keyPressEvent(event); 
}