Long live Qt 4.5!

1 files changed, 212 insertions, 0 deletions

diff --git a/examples/draganddrop/fridgemagnets/dragwidget.cpp b/examples/draganddrop/fridgemagnets/dragwidget.cpp
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+++ b/examples/draganddrop/fridgemagnets/dragwidget.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "draglabel.h"
+#include "dragwidget.h"
+
+//! [0]
+DragWidget::DragWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    QFile dictionaryFile(":/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("application/x-fridgemagnet")) {
+        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("application/x-fridgemagnet")) {
+        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("application/x-fridgemagnet")) {
+        const QMimeData *mime = event->mimeData();
+//! [9] //! [10]
+        QByteArray itemData = mime->data("application/x-fridgemagnet");
+        QDataStream dataStream(&itemData, QIODevice::ReadOnly);
+
+        QString text;
+        QPoint offset;
+        dataStream >> text >> offset;
+//! [10]
+//! [11]
+        DragLabel *newLabel = new DragLabel(text, this);
+        newLabel->move(event->pos() - 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(QRegExp("\\s+"),
+                             QString::SkipEmptyParts);
+        QPoint position = event->pos();
+
+        foreach (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->pos()));
+    if (!child)
+        return;
+
+    QPoint hotSpot = event->pos() - child->pos();
+
+    QByteArray itemData;
+    QDataStream dataStream(&itemData, QIODevice::WriteOnly);
+    dataStream << child->labelText() << QPoint(hotSpot);
+//! [14]
+
+//! [15]
+    QMimeData *mimeData = new QMimeData;
+    mimeData->setData("application/x-fridgemagnet", 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]