Refactor the QPA dnd interface.

- Give QPlatformDrag a synchronous drag() function returning
  the Qt::DropAction
- Move the base functionality for asynchronous event handling
  to the platformsupport library as QBasicDrag (extendable base class
  handling drag icon and providing new virtuals)  and QSimpleDrag
  (sample implementation for drag within the Qt application).
- Change the Windows implementation accordingly.
- Change XCB to be based on QBasicDrag.
- Clean up QDragManager.

Change-Id: I654f76f0e55a385ba189bd74f3ceaded6a8fe318
Reviewed-by: Morten Johan Sørvig <morten.sorvig@nokia.com>

1 files changed, 100 insertions, 0 deletions

diff --git a/src/platformsupport/dnd/qshapedpixmapdndwindow.cpp b/src/platformsupport/dnd/qshapedpixmapdndwindow.cpp
new file mode 100644
index 0000000000..4eed1e7d85
--- /dev/null
+++ b/src/platformsupport/dnd/qshapedpixmapdndwindow.cpp
@@ -0,0 +1,100 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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 1.1, 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qshapedpixmapdndwindow_p.h"
+
+#include <QtGui/QPainter>
+#include <QtGui/QCursor>
+
+QT_BEGIN_NAMESPACE
+
+QShapedPixmapWindow::QShapedPixmapWindow()
+    : QWindow(),
+      m_backingStore(0)
+{
+    setSurfaceType(RasterSurface);
+    setWindowFlags(Qt::ToolTip | Qt::FramelessWindowHint |
+                   Qt::X11BypassWindowManagerHint | Qt::WindowTransparentForInput);
+    create();
+    m_backingStore = new QBackingStore(this);
+}
+
+void QShapedPixmapWindow::render()
+{
+    QRect rect(QPoint(), geometry().size());
+
+    m_backingStore->beginPaint(rect);
+
+    QPaintDevice *device = m_backingStore->paintDevice();
+
+    {
+        QPainter p(device);
+        p.drawPixmap(0, 0, m_pixmap);
+    }
+
+    m_backingStore->endPaint();
+    m_backingStore->flush(rect);
+}
+
+void QShapedPixmapWindow::setPixmap(const QPixmap &pixmap)
+{
+    m_pixmap = pixmap;
+}
+
+void QShapedPixmapWindow::setHotspot(const QPoint &hotspot)
+{
+    m_hotSpot = hotspot;
+}
+
+void QShapedPixmapWindow::updateGeometry()
+{
+    QRect rect(QCursor::pos() - m_hotSpot, m_pixmap.size());
+    if (m_backingStore->size() != m_pixmap.size())
+        m_backingStore->resize(m_pixmap.size());
+    setGeometry(rect);
+}
+
+void QShapedPixmapWindow::exposeEvent(QExposeEvent *)
+{
+    render();
+}
+
+QT_END_NAMESPACE