Long live Qt 4.5!

1 files changed, 164 insertions, 0 deletions

diff --git a/examples/draganddrop/draggabletext/dragwidget.cpp b/examples/draganddrop/draggabletext/dragwidget.cpp
new file mode 100644
index 0000000..2af7b29
--- /dev/null
+++ b/examples/draganddrop/draggabletext/dragwidget.cpp
@@ -0,0 +1,164 @@
+/****************************************************************************
+**
+** 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"
+
+DragWidget::DragWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    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 >= 195) {
+                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 (children().contains(event->source())) {
+            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();
+}