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 | #include <QtWidgets>
 
#include "draglabel.h"
#include "dragwidget.h"
 
DragWidget::DragWidget(QWidget *parent)
    : QWidget(parent)
{
    setupAction();
 
    QFile dictionaryFile(":/dictionary/words.txt");
    dictionaryFile.open(QIODevice::ReadOnly);
    QTextStream inputStream(&dictionaryFile);
 
    int x = 5;
    int y = 5;
 
    while (!inputStream.atEnd()) {
        QString word;
        inputStream >> word;
        if (!word.isEmpty()) {
            DragLabel *wordLabel = new DragLabel(word, this);
            wordLabel->move(x, y);
            wordLabel->show();
            wordLabel->setAttribute(Qt::WA_DeleteOnClose);
            x += wordLabel->width() + 2;
            if (x >= 245) {
                x = 5;
                y += wordLabel->height() + 2;
            }
        }
    }
 
    /*
    QPalette newPalette = palette();
    newPalette.setColor(QPalette::Window, Qt::white);
    setPalette(newPalette);
    */
 
    setAcceptDrops(true);
    setMinimumSize(400, qMax(200, y));
    setWindowTitle(tr("Draggable Text"));
}
 
void DragWidget::dragEnterEvent(QDragEnterEvent *event)
{
    if (event->mimeData()->hasText()) {
        if (event->source() == this) {
            event->setDropAction(Qt::MoveAction);
            event->accept();
 
        } else {
            event->acceptProposedAction();
        }
    } else {
        event->ignore();
    }
}
 
void DragWidget::dropEvent(QDropEvent *event)
{
    if (event->mimeData()->hasText()) {
        const QMimeData *mime = event->mimeData();
        QStringList pieces = mime->text().split(QRegExp("\\s+"),
                             QString::SkipEmptyParts);
        QPoint position = event->pos();
        QPoint hotSpot;
 
        QList<QByteArray> hotSpotPos = mime->data("application/x-hotspot").split(' ');
        if (hotSpotPos.size() == 2) {
            hotSpot.setX(hotSpotPos.first().toInt());
            hotSpot.setY(hotSpotPos.last().toInt());
        }
 
        foreach (QString piece, pieces) {
            DragLabel *newLabel = new DragLabel(piece, this);
            newLabel->move(position - hotSpot);
            newLabel->show();
            newLabel->setAttribute(Qt::WA_DeleteOnClose);
            position += QPoint(newLabel->width(), 0);
        }
 
        if (event->source() == this) {
            event->setDropAction(Qt::MoveAction);
            event->accept();
        } else {
            event->acceptProposedAction();
        }
    } else {
        event->ignore();
    }
    foreach (QObject *child, children()) {
        if (child->inherits("QWidget")) {
            QWidget *widget = static_cast<QWidget *>(child);
            if (!widget->isVisible())
                widget->deleteLater();
        }
    }
}
 
void DragWidget::mousePressEvent(QMouseEvent *event)
{
    QLabel *child = static_cast<QLabel*>(childAt(event->pos()));
    if (!child)
        return;
 
    QPoint hotSpot = event->pos() - child->pos();
 
    QMimeData *mimeData = new QMimeData;
    mimeData->setText(child->text());
    mimeData->setData("application/x-hotspot",
                      QByteArray::number(hotSpot.x()) + " " + QByteArray::number(hotSpot.y()));
 
    QPixmap pixmap(child->size());
    child->render(&pixmap);
 
    QDrag *drag = new QDrag(this);
    drag->setMimeData(mimeData);
    drag->setPixmap(pixmap);
    drag->setHotSpot(hotSpot);
 
    Qt::DropAction dropAction = drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction);
 
    if (dropAction == Qt::MoveAction)
        child->close();
}
 
void DragWidget::mouseDoubleClickEvent(QMouseEvent *event)
{
 
    QLabel *child = static_cast<QLabel*>(childAt(event->pos()));
    if (!child)
        return;
 
    QPoint hotSpot = event->pos() - child->pos();
 
    QMimeData *mimeData = new QMimeData;
    mimeData->setText(child->text());
    mimeData->setData("application/x-hotspot",
                      QByteArray::number(hotSpot.x()) + " " + QByteArray::number(hotSpot.y()));
 
    QPixmap pixmap(child->size());
    child->setTextInteractionFlags(Qt::TextEditorInteraction);
    child->render(&pixmap);
 
 
   /* Qt::TextFormat actiontext = child->setTextInteractionFlags(Qt::TextEditorInteraction);
    if (actiontext == Qt::Key_Enter)
    child->close();*/
 
    QDrag *drag = new QDrag(this);
    drag->setMimeData(mimeData);
    drag->setPixmap(pixmap);
    drag->setHotSpot(hotSpot);
 
  /* Qt::DropAction dropAction = drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction);
 
    if (dropAction == Qt::MoveAction)
        child->close();*/
}
 
//Méthode pour définir l'action
void DragWidget::setupAction()
{
    QAction *a;
    a = new QAction(this);
    a->setShortcut(Qt::CTRL + Qt::Key_P);
    connect(a, SIGNAL(triggered()), this, SLOT(filePrintPreview()));
    addAction(a);
}
 
//Méthode pour faire l'aperçu avant impression
void DragWidget::filePrintPreview()
{
#ifndef QT_NO_PRINTER
    QPrinter *printer  = new QPrinter(QPrinter::HighResolution);
    printer->setPaperSize(QSizeF(8.5, 5.4), QPrinter::Inch);
    QPrintPreviewDialog *preview = new QPrintPreviewDialog(printer, this);
    connect(preview, SIGNAL(paintRequested(QPrinter*)), this, SLOT(printPreview(QPrinter*)));
    preview->exec();
#endif
}
 
//Cette méthode permet de créer ce qu'on veut afficher dans l'aperçu avant impression
void DragWidget::printPreview(QPrinter *printer)
{
#ifdef QT_NO_PRINTER
    Q_UNUSED(printer);
#else
    textDocument = new QTextDocument;
    textDocument->print(printer);
#endif
} | 
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