#include <qapplication.h>#include <qclipboard.h>#include <qmessagebox.h>#include "celldrag.h"#include "mytable.h"MyTable::MyTable(QWidget *parent, const char *name)    : QTable(parent, name){    setDragEnabled(true);    clear();}void MyTable::clear(){    setNumRows(0);    setNumCols(0);    setNumRows(NumRows);    setNumCols(NumCols);    for (int i = 0; i < NumCols; i++)        horizontalHeader()->setLabel(i, QChar('A' + i));    setCurrentCell(0, 0);}QTableSelection MyTable::selection(){    if (QTable::selection(0).isEmpty())        return QTableSelection(currentRow(), currentColumn(),                               currentRow(), currentColumn());    return QTable::selection(0);}QString MyTable::selectionAsString(){    QTableSelection sel = QTable::selection(0);    QString str;    for (int i = 0; i < sel.numRows(); ++i) {        if (i > 0)            str += "\n";        for (int j = 0; j < sel.numCols(); ++j) {            if (j > 0)                str += "\t";            str += text(sel.topRow() + i, sel.leftCol() + j);        }    }    return str;}void MyTable::copy(){    QApplication::clipboard()->setData(dragObject());}void MyTable::paste(){    QMimeSource *source = QApplication::clipboard()->data();    if (CellDrag::canDecode(source)) {        QString str;        CellDrag::decode(source, str);        performPaste(str);    }}void MyTable::performPaste(const QString &str){    QTableSelection sel = selection();    QStringList rows = QStringList::split("\n", str, true);    int numRows = rows.size();    int numCols = rows.first().contains("\t") + 1;    if (sel.numRows() * sel.numCols() != 1        && (sel.numRows() != numRows            || sel.numCols() != numCols)) {        QMessageBox::information(this, tr("My Table"),                tr("The information cannot be pasted because the "                   "copy and paste areas aren't the same size."));        return;    }    for (int i = 0; i < numRows; ++i) {        QStringList cols = QStringList::split("\t", rows[i], true);        for (int j = 0; j < numCols; ++j)            setText(sel.topRow() + i, sel.leftCol() + j, cols[j]);    }}QDragObject *MyTable::dragObject(){    return new CellDrag(selectionAsString(), this);}