Question

我正在使用qt框架开发应用程序，现在我想将表格数据保存为pdf。我正在使用QTextTable和QTextDocument类。但是我无法将文本居中在单元格中。我该怎么办？

感谢您的帮助。

Answer 1

如果要在插入文本时进行对齐，可以使用alignment = Qt：AlignHCenter调用此函数。您可以修改该功能以指定字符格式。

// Insert text with specified alignment in specified cell
void insertAlignedText(QTextTable *table, int row, int col, Qt::Alignment alignment, QString text)
{
    // Obtain cursor and current block format
    QTextCursor textCursor = table->cellAt(row,col).firstCursorPosition();    
    QTextBlockFormat blockFormat = textCursor.blockFormat();

    // Read vertical part of current alignment flags
    Qt::Alignment vertAlign = blockFormat.alignment() & Qt::AlignVertical_Mask;

    // Mask out vertical part of specified alignment flags
    Qt::Alignment horzAlign = alignment & Qt::AlignHorizontal_Mask;

    // Combine current vertical and specified horizontal alignment
    Qt::Alignment combAlign = horzAlign | vertAlign;

    // Apply and write
    blockFormat.setAlignment(combAlign);    
    textCursor.setBlockFormat(blockFormat);
    textCursor.insertText(text);
}

Answer 2

QTextBlockFormat centerAlignment;
centerAlignment.setAlignment(Qt::AlignHCenter);

cursor = table->cellAt(row, column).firstCursorPosition();
cursor.setBlockFormat(centerAlignment);
cursor.insertText("Hello, this is my first post here!");

但请注意，设置一次的对齐有效，直到下一次更改。这意味着，例如，如果您有一个表中的两列，一个具有左对齐，一个具有右对齐，并且您要逐行添加到表中，则必须为每个单元调用QTextCursor::setBlockFormat()来交替左右对齐。

Answer 3

如果要在写入文本后修改对齐，可以使用以下函数with alignment = Qt：AlignHCenter。

// Modify horizontal alignment of text in specified cell
void modifyTextAlignment(QTextTable *table, int row, int col, Qt::Alignment alignment)
{
    // Obtain cursor and current block format
    QTextCursor textCursor = table->cellAt(row,col).firstCursorPosition();   
    textCursor.select(QTextCursor::BlockUnderCursor);
    QTextBlockFormat blockFormat = textCursor.blockFormat();

    // Read vertical part of current alignment flags
    Qt::Alignment vertAlign = blockFormat.alignment() & Qt::AlignVertical_Mask;

    // Mask out vertical part of specified alignment flags
    Qt::Alignment horzAlign = alignment & Qt::AlignHorizontal_Mask;

    // Combine current vertical and specified horizontal alignment
    Qt::Alignment combAlign = horzAlign | vertAlign;

    // Apply
    blockFormat.setAlignment(combAlign);    
    textCursor.setBlockFormat(blockFormat);
}

Answer 4

此问题的PyQt5等效解决方案（如何在QTextTable中居中放置文本）。这也适用于合并的单元格。

centerAlignment = PyQt5.QtGui.QTextBlockFormat()
centerAlignment.setAlignment(PyQt5.QtCore.Qt.AlignHCenter)
cursor = table.cellAt(row, column).firstCursorPosition()
cursor.setBlockFormat(centerAlignment)
cursor.insertText("Hello, this is the PyQt5 code equivalent to this question!")

Answer 5

请参阅QTextTable::setFormat，QTextTableFormat::setAlignment，QTextTableCell::setFormat和QTextCharFormat::setVerticalAlignment。或者，您可以查看Qt Style Sheets。

如何在QTextTable中居中文本

5 个答案: