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

Copying a (rtf) table into the clipboard via QT (or: Writing a QTextDocument into clipboard)

本文关键字:剪贴板 QTextDocument 复制 QT rtf 通过      更新时间:2023-10-16

我需要我的QT应用程序来创建一个表,并将此表复制到剪贴板中,以便以后可以将其作为表粘贴到libreoffice Writer或MS Word中。

我的第一种方法是为表创建html代码,并使用将其插入剪贴板

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

这种方法没有奏效。粘贴时,表格单元格只是相互附加并插入,没有设置格式。

我使用RTF的第二种方法:

QTextDocument rtfDocument;
rtfDocument.setHtml(html);

但我找不到将这个QTextDocument复制到剪贴板的方法。有吗?如果我能从QTextDocument中获得RTF代码,我可以使用类似的方法

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

但我也没有找到返回rtf代码的函数。

编辑:

使用上面的最后一个代码框,我有一种将rtf代码复制到剪贴板的工作方法。因此,任何可以创建表示表的RTF代码的解决方案都可以解决我的问题。

我不确定您的数据源是什么,但这里是我们用来对普通QTableView进行子类化以使其可复制的代码。有些代码已经被删掉了,但你可以得到基本的想法。RTF/HTML太夸张了——所有的电子表格都接受好的ol’CSV。

当然,如果您需要格式化,这个答案将毫无帮助。我从你的问题中不清楚这是否是一项要求。

// 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);
}

您可以尝试使用QTextDocument::toHtml()并将mime类型设置为text/html/

我在gedit 1[tab space]2[tab space]3n4[tab space]5[tab space]6中编写并复制到电子表格中,它就工作了。所以,我认为如果用"\t"分隔行中的单元格,用"\n"分隔行,它会起作用。