6.5.3 clean

tests/manual/examples/widgets/draganddrop/fridgemagnets/dragwidget.cpp

@@ -0,0 +1,176 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "draglabel.h"
+#include "dragwidget.h"
+
+#include <QtWidgets>
+
+static inline QString fridgetMagnetsMimeType() { return QStringLiteral("application/x-fridgemagnet"); }
+
+//! [0]
+DragWidget::DragWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    QFile dictionaryFile(QStringLiteral(":/dictionary/words.txt"));
+    dictionaryFile.open(QFile::ReadOnly);
+    QTextStream inputStream(&dictionaryFile);
+//! [0]
+
+//! [1]
+    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;
+            }
+        }
+    }
+//! [1]
+
+//! [2]
+    QPalette newPalette = palette();
+    newPalette.setColor(QPalette::Window, Qt::white);
+    setPalette(newPalette);
+
+    setMinimumSize(400, qMax(200, y));
+    setWindowTitle(tr("Fridge Magnets"));
+//! [2] //! [3]
+    setAcceptDrops(true);
+}
+//! [3]
+
+//! [4]
+void DragWidget::dragEnterEvent(QDragEnterEvent *event)
+{
+//! [4] //! [5]
+    if (event->mimeData()->hasFormat(fridgetMagnetsMimeType())) {
+        if (children().contains(event->source())) {
+            event->setDropAction(Qt::MoveAction);
+            event->accept();
+        } else {
+            event->acceptProposedAction();
+//! [5] //! [6]
+        }
+//! [6] //! [7]
+    } else if (event->mimeData()->hasText()) {
+        event->acceptProposedAction();
+    } else {
+        event->ignore();
+    }
+}
+//! [7]
+
+//! [8]
+void DragWidget::dragMoveEvent(QDragMoveEvent *event)
+{
+    if (event->mimeData()->hasFormat(fridgetMagnetsMimeType())) {
+        if (children().contains(event->source())) {
+            event->setDropAction(Qt::MoveAction);
+            event->accept();
+        } else {
+            event->acceptProposedAction();
+        }
+    } else if (event->mimeData()->hasText()) {
+        event->acceptProposedAction();
+    } else {
+        event->ignore();
+    }
+}
+//! [8]
+
+//! [9]
+void DragWidget::dropEvent(QDropEvent *event)
+{
+    if (event->mimeData()->hasFormat(fridgetMagnetsMimeType())) {
+        const QMimeData *mime = event->mimeData();
+//! [9] //! [10]
+        QByteArray itemData = mime->data(fridgetMagnetsMimeType());
+        QDataStream dataStream(&itemData, QIODevice::ReadOnly);
+
+        QString text;
+        QPoint offset;
+        dataStream >> text >> offset;
+//! [10]
+//! [11]
+        DragLabel *newLabel = new DragLabel(text, this);
+        newLabel->move(event->position().toPoint() - offset);
+        newLabel->show();
+        newLabel->setAttribute(Qt::WA_DeleteOnClose);
+
+        if (event->source() == this) {
+            event->setDropAction(Qt::MoveAction);
+            event->accept();
+        } else {
+            event->acceptProposedAction();
+        }
+//! [11] //! [12]
+    } else if (event->mimeData()->hasText()) {
+        QStringList pieces = event->mimeData()->text().split(
+            QRegularExpression(QStringLiteral("\\s+")), Qt::SkipEmptyParts);
+        QPoint position = event->position().toPoint();
+
+        for (const QString &piece : pieces) {
+            DragLabel *newLabel = new DragLabel(piece, this);
+            newLabel->move(position);
+            newLabel->show();
+            newLabel->setAttribute(Qt::WA_DeleteOnClose);
+
+            position += QPoint(newLabel->width(), 0);
+        }
+
+        event->acceptProposedAction();
+    } else {
+        event->ignore();
+    }
+}
+//! [12]
+
+//! [13]
+void DragWidget::mousePressEvent(QMouseEvent *event)
+{
+//! [13]
+//! [14]
+    DragLabel *child = static_cast<DragLabel*>(childAt(event->position().toPoint()));
+    if (!child)
+        return;
+
+    QPoint hotSpot = event->position().toPoint() - child->pos();
+
+    QByteArray itemData;
+    QDataStream dataStream(&itemData, QIODevice::WriteOnly);
+    dataStream << child->labelText() << QPoint(hotSpot);
+//! [14]
+
+//! [15]
+    QMimeData *mimeData = new QMimeData;
+    mimeData->setData(fridgetMagnetsMimeType(), itemData);
+    mimeData->setText(child->labelText());
+//! [15]
+
+//! [16]
+    QDrag *drag = new QDrag(this);
+    drag->setMimeData(mimeData);
+    drag->setPixmap(child->pixmap());
+    drag->setHotSpot(hotSpot);
+
+    child->hide();
+//! [16]
+
+//! [17]
+    if (drag->exec(Qt::MoveAction | Qt::CopyAction, Qt::CopyAction) == Qt::MoveAction)
+        child->close();
+    else
+        child->show();
+}
+//! [17]