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QTableView中选定的行，复制到QClipboard

发布于 2024-07-30 07:56:46 字数 298 浏览 10 评论 0原文

我有一个 SQLite 数据库，并将其放入 QSqlTableModel 中。 为了显示数据库，我将该模型放入 QTableView 中。

现在我想创建一个方法，将选定的行（或整行）复制到 QClipboard 中。 之后我想将其插入到我的 OpenOffice.Calc-Document 中。

但我不知道如何处理 Selected SIGNAL 和 QModelIndex 以及如何将其放入剪贴板。

原文

I have a SQLite-Database and I did it into a QSqlTableModel.
To show the Database, I put that Model into a QTableView.

Now I want to create a Method where the selected Rows (or the whole Line) will be copied into the QClipboard. After that I want to insert it into my OpenOffice.Calc-Document.

But I have no Idea what to do with the Selected SIGNAL and the QModelIndex and how to put this into the Clipboard.

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评论（12）

面犯桃花 2024-08-06 07:56:46

要实际捕获选择，您可以使用项目视图的 选择模型 来获取索引列表。 假设您有一个名为 view 的 QTableView *，您可以通过以下方式进行选择：

QAbstractItemModel * model = view->model();
QItemSelectionModel * selection = view->selectionModel();
QModelIndexList indexes = selection->selectedIndexes();

然后循环遍历索引列表，调用 model->data(index)。 将数据转换为字符串（如果尚未转换）并将每个字符串连接在一起。 然后您可以使用QClipboard.setText将结果粘贴到剪贴板。 请注意，对于 Excel 和 Calc，每列与下一列之间用换行符 ("\n") 分隔，每行由制表符 ("\t") 分隔。 您必须检查索引以确定何时移动到下一行。

QString selected_text;
// You need a pair of indexes to find the row changes
QModelIndex previous = indexes.first();
indexes.removeFirst();
foreach(const QModelIndex ¤t, indexes)
{
    QVariant data = model->data(current);
    QString text = data.toString();
    // At this point `text` contains the text in one cell
    selected_text.append(text);
    // If you are at the start of the row the row number of the previous index
    // isn't the same.  Text is followed by a row separator, which is a newline.
    if (current.row() != previous.row())
    {
        selected_text.append('\n');
    }
    // Otherwise it's the same row, so append a column separator, which is a tab.
    else
    {
        selected_text.append('\t');
    }
    previous = current;
}
QApplication.clipboard().setText(selected_text);

警告：我还没有机会尝试这段代码，但 PyQt 的等效代码可以工作。

To actually capture the selection you use the item view's selection model to get a list of indices. Given that you have a QTableView * called view you get the selection this way:

QAbstractItemModel * model = view->model();
QItemSelectionModel * selection = view->selectionModel();
QModelIndexList indexes = selection->selectedIndexes();

Then loop through the index list calling model->data(index) on each index. Convert the data to a string if it isn't already and concatenate each string together. Then you can use QClipboard.setText to paste the result to the clipboard. Note that, for Excel and Calc, each column is separated from the next by a newline ("\n") and each row is separated by a tab ("\t"). You have to check the indices to determine when you move to the next row.

QString selected_text;
// You need a pair of indexes to find the row changes
QModelIndex previous = indexes.first();
indexes.removeFirst();
foreach(const QModelIndex ¤t, indexes)
{
    QVariant data = model->data(current);
    QString text = data.toString();
    // At this point `text` contains the text in one cell
    selected_text.append(text);
    // If you are at the start of the row the row number of the previous index
    // isn't the same.  Text is followed by a row separator, which is a newline.
    if (current.row() != previous.row())
    {
        selected_text.append('\n');
    }
    // Otherwise it's the same row, so append a column separator, which is a tab.
    else
    {
        selected_text.append('\t');
    }
    previous = current;
}
QApplication.clipboard().setText(selected_text);

Warning: I have not had a chance to try this code, but a PyQt equivalent works.

回复 原文
十秒萌定你 2024-08-06 07:56:46

我遇到了类似的问题，最终调整了 QTableWidget （它是 QTableView 的扩展）来添加复制/粘贴功能。 以下是基于上面 quark 提供的代码构建的代码：

qtablewidgetwithcopypaste.h

// QTableWidget with support for copy and paste added
// Here copy and paste can copy/paste the entire grid of cells
#ifndef QTABLEWIDGETWITHCOPYPASTE_H
#define QTABLEWIDGETWITHCOPYPASTE_H

#include <QTableWidget>
#include <QKeyEvent>
#include <QWidget>

class QTableWidgetWithCopyPaste : public QTableWidget
{
    Q_OBJECT
public:
  QTableWidgetWithCopyPaste(int rows, int columns, QWidget *parent = 0) :
      QTableWidget(rows, columns, parent)
  {}

  QTableWidgetWithCopyPaste(QWidget *parent = 0) :
  QTableWidget(parent)
  {}

private:
  void copy();
  void paste();

public slots:
  void keyPressEvent(QKeyEvent * event);
};

#endif // QTABLEWIDGETWITHCOPYPASTE_H

qtablewidgetwithcopypaste.cpp

#include "qtablewidgetwithcopypaste.h"
#include <QApplication>
#include <QMessageBox>
#include <QClipboard>
#include <QMimeData>

void QTableWidgetWithCopyPaste::copy()
{
    QItemSelectionModel * selection = selectionModel();
    QModelIndexList indexes = selection->selectedIndexes();

    if(indexes.size() < 1)
        return;

    // QModelIndex::operator < sorts first by row, then by column.
    // this is what we need
//    std::sort(indexes.begin(), indexes.end());
    qSort(indexes);

    // You need a pair of indexes to find the row changes
    QModelIndex previous = indexes.first();
    indexes.removeFirst();
    QString selected_text_as_html;
    QString selected_text;
    selected_text_as_html.prepend("<html><style>br{mso-data-placement:same-cell;}</style><table><tr><td>");
    QModelIndex current;
    Q_FOREACH(current, indexes)
    {
        QVariant data = model()->data(previous);
        QString text = data.toString();
        selected_text.append(text);
        text.replace("\n","<br>");
        // At this point `text` contains the text in one cell
        selected_text_as_html.append(text);

        // If you are at the start of the row the row number of the previous index
        // isn't the same.  Text is followed by a row separator, which is a newline.
        if (current.row() != previous.row())
        {
            selected_text_as_html.append("</td></tr><tr><td>");
            selected_text.append(QLatin1Char('\n'));
        }
        // Otherwise it's the same row, so append a column separator, which is a tab.
        else
        {
            selected_text_as_html.append("</td><td>");
            selected_text.append(QLatin1Char('\t'));
        }
        previous = current;
    }

    // add last element
    selected_text_as_html.append(model()->data(current).toString());
    selected_text.append(model()->data(current).toString());
    selected_text_as_html.append("</td></tr>");
    QMimeData * md = new QMimeData;
    md->setHtml(selected_text_as_html);
//    qApp->clipboard()->setText(selected_text);
    md->setText(selected_text);
    qApp->clipboard()->setMimeData(md);

//    selected_text.append(QLatin1Char('\n'));
//    qApp->clipboard()->setText(selected_text);
}

void QTableWidgetWithCopyPaste::paste()
{
    if(qApp->clipboard()->mimeData()->hasHtml())
    {
        // TODO, parse the html data
    }
    else
    {
        QString selected_text = qApp->clipboard()->text();
        QStringList cells = selected_text.split(QRegExp(QLatin1String("\\n|\\t")));
        while(!cells.empty() && cells.back().size() == 0)
        {
            cells.pop_back(); // strip empty trailing tokens
        }
        int rows = selected_text.count(QLatin1Char('\n'));
        int cols = cells.size() / rows;
        if(cells.size() % rows != 0)
        {
            // error, uneven number of columns, probably bad data
            QMessageBox::critical(this, tr("Error"),
                                  tr("Invalid clipboard data, unable to perform paste operation."));
            return;
        }

        if(cols != columnCount())
        {
            // error, clipboard does not match current number of columns
            QMessageBox::critical(this, tr("Error"),
                                  tr("Invalid clipboard data, incorrect number of columns."));
            return;
        }

        // don't clear the grid, we want to keep any existing headers
        setRowCount(rows);
        // setColumnCount(cols);
        int cell = 0;
        for(int row=0; row < rows; ++row)
        {
            for(int col=0; col < cols; ++col, ++cell)
            {
                QTableWidgetItem *newItem = new QTableWidgetItem(cells[cell]);
                setItem(row, col, newItem);
            }
        }
    }
}

void QTableWidgetWithCopyPaste::keyPressEvent(QKeyEvent * event)
{
    if(event->matches(QKeySequence::Copy) )
    {
        copy();
    }
    else if(event->matches(QKeySequence::Paste) )
    {
        paste();
    }
    else
    {
        QTableWidget::keyPressEvent(event);
    }

}

I had a similar problem and ended up adapting QTableWidget (which is an extension of QTableView) to add copy/paste functionality. Here is the code which builds on what was provided by quark above:

qtablewidgetwithcopypaste.h

// QTableWidget with support for copy and paste added
// Here copy and paste can copy/paste the entire grid of cells
#ifndef QTABLEWIDGETWITHCOPYPASTE_H
#define QTABLEWIDGETWITHCOPYPASTE_H

#include <QTableWidget>
#include <QKeyEvent>
#include <QWidget>

class QTableWidgetWithCopyPaste : public QTableWidget
{
    Q_OBJECT
public:
  QTableWidgetWithCopyPaste(int rows, int columns, QWidget *parent = 0) :
      QTableWidget(rows, columns, parent)
  {}

  QTableWidgetWithCopyPaste(QWidget *parent = 0) :
  QTableWidget(parent)
  {}

private:
  void copy();
  void paste();

public slots:
  void keyPressEvent(QKeyEvent * event);
};

#endif // QTABLEWIDGETWITHCOPYPASTE_H

qtablewidgetwithcopypaste.cpp

#include "qtablewidgetwithcopypaste.h"
#include <QApplication>
#include <QMessageBox>
#include <QClipboard>
#include <QMimeData>

void QTableWidgetWithCopyPaste::copy()
{
    QItemSelectionModel * selection = selectionModel();
    QModelIndexList indexes = selection->selectedIndexes();

    if(indexes.size() < 1)
        return;

    // QModelIndex::operator < sorts first by row, then by column.
    // this is what we need
//    std::sort(indexes.begin(), indexes.end());
    qSort(indexes);

    // You need a pair of indexes to find the row changes
    QModelIndex previous = indexes.first();
    indexes.removeFirst();
    QString selected_text_as_html;
    QString selected_text;
    selected_text_as_html.prepend("<html><style>br{mso-data-placement:same-cell;}</style><table><tr><td>");
    QModelIndex current;
    Q_FOREACH(current, indexes)
    {
        QVariant data = model()->data(previous);
        QString text = data.toString();
        selected_text.append(text);
        text.replace("\n","<br>");
        // At this point `text` contains the text in one cell
        selected_text_as_html.append(text);

        // If you are at the start of the row the row number of the previous index
        // isn't the same.  Text is followed by a row separator, which is a newline.
        if (current.row() != previous.row())
        {
            selected_text_as_html.append("</td></tr><tr><td>");
            selected_text.append(QLatin1Char('\n'));
        }
        // Otherwise it's the same row, so append a column separator, which is a tab.
        else
        {
            selected_text_as_html.append("</td><td>");
            selected_text.append(QLatin1Char('\t'));
        }
        previous = current;
    }

    // add last element
    selected_text_as_html.append(model()->data(current).toString());
    selected_text.append(model()->data(current).toString());
    selected_text_as_html.append("</td></tr>");
    QMimeData * md = new QMimeData;
    md->setHtml(selected_text_as_html);
//    qApp->clipboard()->setText(selected_text);
    md->setText(selected_text);
    qApp->clipboard()->setMimeData(md);

//    selected_text.append(QLatin1Char('\n'));
//    qApp->clipboard()->setText(selected_text);
}

void QTableWidgetWithCopyPaste::paste()
{
    if(qApp->clipboard()->mimeData()->hasHtml())
    {
        // TODO, parse the html data
    }
    else
    {
        QString selected_text = qApp->clipboard()->text();
        QStringList cells = selected_text.split(QRegExp(QLatin1String("\\n|\\t")));
        while(!cells.empty() && cells.back().size() == 0)
        {
            cells.pop_back(); // strip empty trailing tokens
        }
        int rows = selected_text.count(QLatin1Char('\n'));
        int cols = cells.size() / rows;
        if(cells.size() % rows != 0)
        {
            // error, uneven number of columns, probably bad data
            QMessageBox::critical(this, tr("Error"),
                                  tr("Invalid clipboard data, unable to perform paste operation."));
            return;
        }

        if(cols != columnCount())
        {
            // error, clipboard does not match current number of columns
            QMessageBox::critical(this, tr("Error"),
                                  tr("Invalid clipboard data, incorrect number of columns."));
            return;
        }

        // don't clear the grid, we want to keep any existing headers
        setRowCount(rows);
        // setColumnCount(cols);
        int cell = 0;
        for(int row=0; row < rows; ++row)
        {
            for(int col=0; col < cols; ++col, ++cell)
            {
                QTableWidgetItem *newItem = new QTableWidgetItem(cells[cell]);
                setItem(row, col, newItem);
            }
        }
    }
}

void QTableWidgetWithCopyPaste::keyPressEvent(QKeyEvent * event)
{
    if(event->matches(QKeySequence::Copy) )
    {
        copy();
    }
    else if(event->matches(QKeySequence::Paste) )
    {
        paste();
    }
    else
    {
        QTableWidget::keyPressEvent(event);
    }

}
回复 原文
晒暮凉 2024-08-06 07:56:46

夸克的答案（选定的答案）很有利于为人们指明正确的方向，但他的算法完全不正确。 除了一处错误和不正确的赋值之外，它甚至在语法上也不正确。 下面是我刚刚编写和测试的工作版本。

假设我们的示例表如下所示：

A | 乙| C
d | 电子| F

夸克算法的问题如下：

如果我们将他的\t分隔符替换为'| '，它将产生以下输出：
B | C | D
电子| F |

一个错误是 D 出现在第一行。 省略 A 可以证明分配不正确。

下面的算法用正确的语法纠正了这两个问题。

    QString clipboardString;
    QModelIndexList selectedIndexes = view->selectionModel()->selectedIndexes();

    for (int i = 0; i < selectedIndexes.count(); ++i)
    {
        QModelIndex current = selectedIndexes[i];
        QString displayText = current.data(Qt::DisplayRole).toString();

        // If there exists another column beyond this one.
        if (i + 1 < selectedIndexes.count())
        {
            QModelIndex next = selectedIndexes[i+1];

            // If the column is on different row, the clipboard should take note.
            if (next.row() != current.row())
            {
                displayText.append("\n");
            }
            else
            {
                // Otherwise append a column separator.
                displayText.append(" | ");
            }
        }
        clipboardString.append(displayText);
    }

    QApplication::clipboard()->setText(clipboardString);

我选择使用计数器而不是迭代器的原因只是因为通过检查计数来测试是否存在另一个索引更容易。 使用迭代器，我想也许您可以增加它并将其存储在弱指针中以测试它是否有效，但只需像我上面那样使用计数器即可。

我们需要检查下行是否会出现在新行上。 如果我们在一个新行上，并且像夸克算法那样检查前一行，那么追加就已经太晚了。 我们可以添加前缀，但随后我们必须跟踪最后一个字符串的大小。 上述代码将从示例表中生成以下输出：

A | 乙| C
D | 电子| F

Quark's answer (the selected one) is good for pointing people in the right direction, but his algorithm is entirely incorrect. In addition to an off by one error and incorrect assignment, its not even syntactically correct. Below is a working version that I just wrote and tested.

Let's assume our example table looks like so:

A | B | C
D | E | F

The problem with Quark's algorithm is the following:

If we replace his \t separator with a ' | ', it will produce this output:
B | C | D
E | F |

The off by one error is that D appears in the first row. The incorrect assignment is evidenced by the omission of A

The following algorithm corrects these two problems with correct syntax.

    QString clipboardString;
    QModelIndexList selectedIndexes = view->selectionModel()->selectedIndexes();

    for (int i = 0; i < selectedIndexes.count(); ++i)
    {
        QModelIndex current = selectedIndexes[i];
        QString displayText = current.data(Qt::DisplayRole).toString();

        // If there exists another column beyond this one.
        if (i + 1 < selectedIndexes.count())
        {
            QModelIndex next = selectedIndexes[i+1];

            // If the column is on different row, the clipboard should take note.
            if (next.row() != current.row())
            {
                displayText.append("\n");
            }
            else
            {
                // Otherwise append a column separator.
                displayText.append(" | ");
            }
        }
        clipboardString.append(displayText);
    }

    QApplication::clipboard()->setText(clipboardString);

The reason I chose to use a counter instead of an iterator is just because it is easier to test if there exists another index by checking against the count. With an iterator, I suppose maybe you could just increment it and store it in a weak pointer to test if it is valid but just use a counter like I did above.

We need to check if the next line will be on on a new row. If we are on a new row and we check the previous row as Quark's algorithm does, its already too late to append. We could prepend, but then we have to keep track of the last string size. The above code will produce the following output from the example table:

A | B | C
D | E | F

回复 原文
南街九尾狐 2024-08-06 07:56:46

无论出于何种原因，我无法访问 std::sort 函数，但是我确实发现，作为 Corwin Joy 解决方案的一个巧妙替代方案，排序函数可以通过替换来实现

 std::sort(indexes.begin(), indexes.end());

这与

  qSort(indexes);

编写相同：

 qSort(indexes.begin(), indexes.end());

感谢您的有用的代码伙计们！

For whatever reason I didn't have access to the std::sort function, however I did find that as a neat alternative to Corwin Joy's solution, the sort function can be implemented by replacing

 std::sort(indexes.begin(), indexes.end());

with

  qSort(indexes);

This is the same as writing:

 qSort(indexes.begin(), indexes.end());

Thanks for your helpful code guys!

回复 原文
红焚 2024-08-06 07:56:46

我根据其他人的一些答案编写了一些代码。 我对 QTableWidget 进行了子类化并重写了 keyPressEvent() ，以允许用户通过键入 Control-C 将所选行复制到剪贴板。

void MyTableWidget::keyPressEvent(QKeyEvent* event) {
    // If Ctrl-C typed
    if (event->key() == Qt::Key_C && (event->modifiers() & Qt::ControlModifier))
    {
        QModelIndexList cells = selectedIndexes();
        qSort(cells); // Necessary, otherwise they are in column order

        QString text;
        int currentRow = 0; // To determine when to insert newlines
        foreach (const QModelIndex& cell, cells) {
            if (text.length() == 0) {
                // First item
            } else if (cell.row() != currentRow) {
                // New row
                text += '\n';
            } else {
                // Next cell
                text += '\t';
            }
            currentRow = cell.row();
            text += cell.data().toString();
        }

        QApplication::clipboard()->setText(text);
    }
}

输出示例（制表符分隔）：

foo bar baz qux
bar baz qux foo
baz qux foo bar
qux foo bar baz

I wrote some code based on some of the others' answers. I subclassed QTableWidget and overrode keyPressEvent() to allow the user to copy the selected rows to the clipboard by typing Control-C.

void MyTableWidget::keyPressEvent(QKeyEvent* event) {
    // If Ctrl-C typed
    if (event->key() == Qt::Key_C && (event->modifiers() & Qt::ControlModifier))
    {
        QModelIndexList cells = selectedIndexes();
        qSort(cells); // Necessary, otherwise they are in column order

        QString text;
        int currentRow = 0; // To determine when to insert newlines
        foreach (const QModelIndex& cell, cells) {
            if (text.length() == 0) {
                // First item
            } else if (cell.row() != currentRow) {
                // New row
                text += '\n';
            } else {
                // Next cell
                text += '\t';
            }
            currentRow = cell.row();
            text += cell.data().toString();
        }

        QApplication::clipboard()->setText(text);
    }
}

Output example (tab-separated):

foo bar baz qux
bar baz qux foo
baz qux foo bar
qux foo bar baz
回复 原文
ヤ经典坏疍 2024-08-06 07:56:46

您需要做的是访问模型中的文本数据，然后将该文本传递到 QClipboard。

要访问模型中的文本数据，请使用 QModelIndex::data()< /代码>。 默认参数是Qt::DisplayRole，即显示的文本。

检索到文本后，使用 QClipboard 将该文本传递到剪贴板： :setText()。

What you'll need to do is access the text data in the model, then pass that text to the QClipboard.

To access the text data in the model, use QModelIndex::data(). The default argument is Qt::DisplayRole, i.e. the displayed text.

Once you've retrieved the text, pass that text to the clipboard using QClipboard::setText().

回复 原文
陌若浮生 2024-08-06 07:56:46

pyqt py2.x 示例：

selection = self.table.selectionModel() #self.table = QAbstractItemView
indexes = selection.selectedIndexes()

columns = indexes[-1].column() - indexes[0].column() + 1
rows = len(indexes) / columns
textTable = [[""] * columns for i in xrange(rows)]

for i, index in enumerate(indexes):
 textTable[i % rows][i / rows] = unicode(self.model.data(index).toString()) #self.model = QAbstractItemModel 

return "\n".join(("\t".join(i) for i in textTable))

a pyqt py2.x example:

selection = self.table.selectionModel() #self.table = QAbstractItemView
indexes = selection.selectedIndexes()

columns = indexes[-1].column() - indexes[0].column() + 1
rows = len(indexes) / columns
textTable = [[""] * columns for i in xrange(rows)]

for i, index in enumerate(indexes):
 textTable[i % rows][i / rows] = unicode(self.model.data(index).toString()) #self.model = QAbstractItemModel 

return "\n".join(("\t".join(i) for i in textTable))
回复 原文
于我来说 2024-08-06 07:56:46

我终于明白了，谢谢。

void Widget::copy() {

QItemSelectionModel *selectionM = tableView->selectionModel();
QModelIndexList selectionL = selectionM->selectedIndexes();

selectionL.takeFirst(); // ID, not necessary
QString *selectionS = new QString(model->data(selectionL.takeFirst()).toString());
selectionS->append(", ");
selectionS->append(model->data(selectionL.takeFirst()).toString());
selectionS->append(", ");
selectionS->append(model->data(selectionL.takeFirst()).toString());
selectionS->append(", ");
selectionS->append(model->data(selectionL.takeFirst()).toString());

clipboard->setText(*selectionS);
}

和

connect (tableView, SIGNAL(clicked(QModelIndex)), this, SLOT(copy()));

I finally got it, thanks.

void Widget::copy() {

QItemSelectionModel *selectionM = tableView->selectionModel();
QModelIndexList selectionL = selectionM->selectedIndexes();

selectionL.takeFirst(); // ID, not necessary
QString *selectionS = new QString(model->data(selectionL.takeFirst()).toString());
selectionS->append(", ");
selectionS->append(model->data(selectionL.takeFirst()).toString());
selectionS->append(", ");
selectionS->append(model->data(selectionL.takeFirst()).toString());
selectionS->append(", ");
selectionS->append(model->data(selectionL.takeFirst()).toString());

clipboard->setText(*selectionS);
}

and

connect (tableView, SIGNAL(clicked(QModelIndex)), this, SLOT(copy()));
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昵称有卵用 2024-08-06 07:56:46

我不禁注意到您可以使用 foreach( ) 构造和 QStringList 类，它有一个方便的 join() 函数。

void Widget::copy()
{
   QStringList list ;
   foreach ( const QModelIndex& index, tableView->selectedIndexes() )
   {
      list << index.data() ;
   }

   clipboard->setText( list.join( ", " ) ) ;
}

I can't help but notice that you can simplify your code using a foreach() construct and the QStringList class, which has a convenient join() function.

void Widget::copy()
{
   QStringList list ;
   foreach ( const QModelIndex& index, tableView->selectedIndexes() )
   {
      list << index.data() ;
   }

   clipboard->setText( list.join( ", " ) ) ;
}
回复 原文
落花随流水 2024-08-06 07:56:46

小心最后一个元素。 请注意，在“removeFirst()”之后索引可能会变空。 因此，“current”永远无效，不应该在 model()->data(current) 中使用。

  indexes.removeFirst();
  QString selected_text;
  QModelIndex current;
  Q_FOREACH(current, indexes)
  {
  .
  .
  .
  }
  // add last element
  selected_text.append(model()->data(current).toString());

考虑

  QModelIndex last = indexes.last();
  indexes.removeFirst();
  QString selected_text;
  Q_FOREACH(QModelIndex current, indexes)
  {
  .
  .
  .
  }
  // add last element
  selected_text.append(model()->data(last).toString());

Careful with the last element. Note below, indexes may become empty after 'removeFirst()'. Thus, 'current' is never valid and should not be used in model()->data(current).

  indexes.removeFirst();
  QString selected_text;
  QModelIndex current;
  Q_FOREACH(current, indexes)
  {
  .
  .
  .
  }
  // add last element
  selected_text.append(model()->data(current).toString());

Consider

  QModelIndex last = indexes.last();
  indexes.removeFirst();
  QString selected_text;
  Q_FOREACH(QModelIndex current, indexes)
  {
  .
  .
  .
  }
  // add last element
  selected_text.append(model()->data(last).toString());
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空城旧梦 2024-08-06 07:56:46

这是 Corwin Joy 发布的内容的变体，它与 QTableView 一起使用并以不同的方式处理稀疏选择。 使用此代码，如果您在不同的行中选择了不同的列（例如选定的单元格为（1,1）、（1, 2）、（2, 1）、（3,2）），那么当您粘贴它时，您将得到空与您选择的“孔”相对应的单元格（例如单元格（2,2）和（3,1））。 它还会拉入与所选内容相交的列的列标题文本。

void CopyableTableView::copy()
{
    QItemSelectionModel *selection = selectionModel();
    QModelIndexList indices = selection->selectedIndexes();

    if(indices.isEmpty())
        return;

    QMap<int, bool> selectedColumnsMap;
    foreach (QModelIndex current, indices) {
        selectedColumnsMap[current.column()] = true;
    }
    QList<int> selectedColumns = selectedColumnsMap.uniqueKeys();
    int minCol = selectedColumns.first();

    // prepend headers for selected columns
    QString selectedText;

    foreach (int column, selectedColumns) {
        selectedText += model()->headerData(column, Qt::Horizontal, Qt::DisplayRole).toString();
        if (column != selectedColumns.last())
            selectedText += QLatin1Char('\t');
    }
    selectedText += QLatin1Char('\n');

    // QModelIndex::operator < sorts first by row, then by column.
    // this is what we need
    qSort(indices);

    int lastRow = indices.first().row();
    int lastColumn = minCol;

    foreach (QModelIndex current, indices) {

        if (current.row() != lastRow) {
            selectedText += QLatin1Char('\n');
            lastColumn = minCol;
            lastRow = current.row();
        }

        if (current.column() != lastColumn) {
            for (int i = 0; i < current.column() - lastColumn; ++i)
                selectedText += QLatin1Char('\t');
            lastColumn = current.column();
        }

        selectedText += model()->data(current).toString();
    }

    selectedText += QLatin1Char('\n');

    QApplication::clipboard()->setText(selectedText);
}

Here is a variation on what Corwin Joy posted that works with QTableView and handles sparse selections differently. With this code if you have different columns selected in different rows (e.g. selected cells are (1,1), (1, 2), (2, 1), (3,2)) then when you paste it you will get empty cells corresponding to the "holes" in your selection (e.g. cells (2,2) and (3,1)). It also pulls in the column header text for columns that intersect the selection.

void CopyableTableView::copy()
{
    QItemSelectionModel *selection = selectionModel();
    QModelIndexList indices = selection->selectedIndexes();

    if(indices.isEmpty())
        return;

    QMap<int, bool> selectedColumnsMap;
    foreach (QModelIndex current, indices) {
        selectedColumnsMap[current.column()] = true;
    }
    QList<int> selectedColumns = selectedColumnsMap.uniqueKeys();
    int minCol = selectedColumns.first();

    // prepend headers for selected columns
    QString selectedText;

    foreach (int column, selectedColumns) {
        selectedText += model()->headerData(column, Qt::Horizontal, Qt::DisplayRole).toString();
        if (column != selectedColumns.last())
            selectedText += QLatin1Char('\t');
    }
    selectedText += QLatin1Char('\n');

    // QModelIndex::operator < sorts first by row, then by column.
    // this is what we need
    qSort(indices);

    int lastRow = indices.first().row();
    int lastColumn = minCol;

    foreach (QModelIndex current, indices) {

        if (current.row() != lastRow) {
            selectedText += QLatin1Char('\n');
            lastColumn = minCol;
            lastRow = current.row();
        }

        if (current.column() != lastColumn) {
            for (int i = 0; i < current.column() - lastColumn; ++i)
                selectedText += QLatin1Char('\t');
            lastColumn = current.column();
        }

        selectedText += model()->data(current).toString();
    }

    selectedText += QLatin1Char('\n');

    QApplication::clipboard()->setText(selectedText);
}
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终止放荡 2024-08-06 07:56:46

如果有人感兴趣，这个网页提供了一个关于这个主题的工作代码项目，它运行得很好。
QAbstractTableModel / QTableView 的复制/粘贴功能实现

If anybody is interested, this web page provide a working code project on this topic, it's working pretty well.
Copy / paste functionality implementation for QAbstractTableModel / QTableView

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