1 /****************************************************************************
3 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
4 ** Contact: http://www.qt-project.org/
6 ** This file is part of the QtGui module of the Qt Toolkit.
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** GNU Lesser General Public License Usage
10 ** This file may be used under the terms of the GNU Lesser General Public
11 ** License version 2.1 as published by the Free Software Foundation and
12 ** appearing in the file LICENSE.LGPL included in the packaging of this
13 ** file. Please review the following information to ensure the GNU Lesser
14 ** General Public License version 2.1 requirements will be met:
15 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
17 ** In addition, as a special exception, Nokia gives you certain additional
18 ** rights. These rights are described in the Nokia Qt LGPL Exception
19 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
21 ** GNU General Public License Usage
22 ** Alternatively, this file may be used under the terms of the GNU General
23 ** Public License version 3.0 as published by the Free Software Foundation
24 ** and appearing in the file LICENSE.GPL included in the packaging of this
25 ** file. Please review the following information to ensure the GNU General
26 ** Public License version 3.0 requirements will be met:
27 ** http://www.gnu.org/copyleft/gpl.html.
30 ** Alternatively, this file may be used in accordance with the terms and
31 ** conditions contained in a signed written agreement between you and Nokia.
40 ****************************************************************************/
42 #include "qplatformdefs.h"
49 #include "qtextcodec.h"
50 #include "qguiapplication.h"
58 #include "qimagereader.h"
59 #include "qimagewriter.h"
62 #include <qpa/qplatformintegration.h>
63 #include <qpa/qplatformdrag.h>
65 #include <private/qguiapplication_p.h>
67 #ifndef QT_NO_DRAGANDDROP
71 // the universe's only drag manager
72 QDragManager *QDragManager::m_instance = 0;
75 QDragManager::QDragManager()
76 : QObject(qApp), m_platformDropData(0), m_currentDropTarget(0),
77 m_platformDrag(QGuiApplicationPrivate::platformIntegration()->drag()),
80 Q_ASSERT(!m_instance);
83 m_platformDropData = m_platformDrag->platformDropData();
87 QDragManager::~QDragManager()
92 QDragManager *QDragManager::self()
94 if (!m_instance && !QGuiApplication::closingDown())
95 m_instance = new QDragManager;
99 QObject *QDragManager::source() const
102 return m_object->source();
106 void QDragManager::setCurrentTarget(QObject *target, bool dropped)
108 if (m_currentDropTarget == target)
111 m_currentDropTarget = target;
112 if (!dropped && m_object) {
113 m_object->d_func()->target = target;
114 emit m_object->targetChanged(target);
118 QObject *QDragManager::currentTarget() const
120 return m_currentDropTarget;
123 Qt::DropAction QDragManager::drag(QDrag *o)
125 if (!o || m_object == o)
126 return Qt::IgnoreAction;
128 if (!m_platformDrag || !o->source()) {
130 return Qt::IgnoreAction;
134 qWarning("QDragManager::drag in possibly invalid state");
135 return Qt::IgnoreAction;
140 m_object->d_func()->target = 0;
142 QGuiApplicationPrivate::instance()->notifyDragStarted(o);
143 const Qt::DropAction result = m_platformDrag->drag(m_object);
148 #endif // QT_NO_DRAGANDDROP
150 #if !(defined(QT_NO_DRAGANDDROP) && defined(QT_NO_CLIPBOARD))
152 static QStringList imageReadMimeFormats()
155 QList<QByteArray> imageFormats = QImageReader::supportedImageFormats();
156 for (int i = 0; i < imageFormats.size(); ++i) {
157 QString format = QLatin1String("image/");
158 format += QString::fromLatin1(imageFormats.at(i).toLower());
159 formats.append(format);
162 //put png at the front because it is best
163 int pngIndex = formats.indexOf(QLatin1String("image/png"));
164 if (pngIndex != -1 && pngIndex != 0)
165 formats.move(pngIndex, 0);
171 static QStringList imageWriteMimeFormats()
174 QList<QByteArray> imageFormats = QImageWriter::supportedImageFormats();
175 for (int i = 0; i < imageFormats.size(); ++i) {
176 QString format = QLatin1String("image/");
177 format += QString::fromLatin1(imageFormats.at(i).toLower());
178 formats.append(format);
181 //put png at the front because it is best
182 int pngIndex = formats.indexOf(QLatin1String("image/png"));
183 if (pngIndex != -1 && pngIndex != 0)
184 formats.move(pngIndex, 0);
189 QInternalMimeData::QInternalMimeData()
194 QInternalMimeData::~QInternalMimeData()
198 bool QInternalMimeData::hasFormat(const QString &mimeType) const
200 bool foundFormat = hasFormat_sys(mimeType);
201 if (!foundFormat && mimeType == QLatin1String("application/x-qt-image")) {
202 QStringList imageFormats = imageReadMimeFormats();
203 for (int i = 0; i < imageFormats.size(); ++i) {
204 if ((foundFormat = hasFormat_sys(imageFormats.at(i))))
211 QStringList QInternalMimeData::formats() const
213 QStringList realFormats = formats_sys();
214 if (!realFormats.contains(QLatin1String("application/x-qt-image"))) {
215 QStringList imageFormats = imageReadMimeFormats();
216 for (int i = 0; i < imageFormats.size(); ++i) {
217 if (realFormats.contains(imageFormats.at(i))) {
218 realFormats += QLatin1String("application/x-qt-image");
226 QVariant QInternalMimeData::retrieveData(const QString &mimeType, QVariant::Type type) const
228 QVariant data = retrieveData_sys(mimeType, type);
229 if (mimeType == QLatin1String("application/x-qt-image")) {
230 if (data.isNull() || (data.type() == QVariant::ByteArray && data.toByteArray().isEmpty())) {
231 // try to find an image
232 QStringList imageFormats = imageReadMimeFormats();
233 for (int i = 0; i < imageFormats.size(); ++i) {
234 data = retrieveData_sys(imageFormats.at(i), type);
235 if (data.isNull() || (data.type() == QVariant::ByteArray && data.toByteArray().isEmpty()))
240 // we wanted some image type, but all we got was a byte array. Convert it to an image.
241 if (data.type() == QVariant::ByteArray
242 && (type == QVariant::Image || type == QVariant::Pixmap || type == QVariant::Bitmap))
243 data = QImage::fromData(data.toByteArray());
245 } else if (mimeType == QLatin1String("application/x-color") && data.type() == QVariant::ByteArray) {
247 QByteArray ba = data.toByteArray();
248 if (ba.size() == 8) {
249 ushort * colBuf = (ushort *)ba.data();
250 c.setRgbF(qreal(colBuf[0]) / qreal(0xFFFF),
251 qreal(colBuf[1]) / qreal(0xFFFF),
252 qreal(colBuf[2]) / qreal(0xFFFF),
253 qreal(colBuf[3]) / qreal(0xFFFF));
256 qWarning("Qt: Invalid color format");
258 } else if (data.type() != type && data.type() == QVariant::ByteArray) {
259 // try to use mime data's internal conversion stuf.
260 QInternalMimeData *that = const_cast<QInternalMimeData *>(this);
261 that->setData(mimeType, data.toByteArray());
262 data = QMimeData::retrieveData(mimeType, type);
268 bool QInternalMimeData::canReadData(const QString &mimeType)
270 return imageReadMimeFormats().contains(mimeType);
273 // helper functions for rendering mimedata to the system, this is needed because QMimeData is in core.
274 QStringList QInternalMimeData::formatsHelper(const QMimeData *data)
276 QStringList realFormats = data->formats();
277 if (realFormats.contains(QLatin1String("application/x-qt-image"))) {
278 // add all supported image formats
279 QStringList imageFormats = imageWriteMimeFormats();
280 for (int i = 0; i < imageFormats.size(); ++i) {
281 if (!realFormats.contains(imageFormats.at(i)))
282 realFormats.append(imageFormats.at(i));
288 bool QInternalMimeData::hasFormatHelper(const QString &mimeType, const QMimeData *data)
291 bool foundFormat = data->hasFormat(mimeType);
293 if (mimeType == QLatin1String("application/x-qt-image")) {
294 // check all supported image formats
295 QStringList imageFormats = imageWriteMimeFormats();
296 for (int i = 0; i < imageFormats.size(); ++i) {
297 if ((foundFormat = data->hasFormat(imageFormats.at(i))))
300 } else if (mimeType.startsWith(QLatin1String("image/"))) {
301 return data->hasImage() && imageWriteMimeFormats().contains(mimeType);
307 QByteArray QInternalMimeData::renderDataHelper(const QString &mimeType, const QMimeData *data)
310 if (mimeType == QLatin1String("application/x-color")) {
311 /* QMimeData can only provide colors as QColor or the name
312 of a color as a QByteArray or a QString. So we need to do
313 the conversion to application/x-color here.
314 The application/x-color format is :
315 type: application/x-color
323 ushort * colBuf = (ushort *)ba.data();
324 QColor c = qvariant_cast<QColor>(data->colorData());
325 colBuf[0] = ushort(c.redF() * 0xFFFF);
326 colBuf[1] = ushort(c.greenF() * 0xFFFF);
327 colBuf[2] = ushort(c.blueF() * 0xFFFF);
328 colBuf[3] = ushort(c.alphaF() * 0xFFFF);
330 ba = data->data(mimeType);
332 if (mimeType == QLatin1String("application/x-qt-image") && data->hasImage()) {
333 QImage image = qvariant_cast<QImage>(data->imageData());
335 buf.open(QBuffer::WriteOnly);
336 // would there not be PNG ??
337 image.save(&buf, "PNG");
338 } else if (mimeType.startsWith(QLatin1String("image/")) && data->hasImage()) {
339 QImage image = qvariant_cast<QImage>(data->imageData());
341 buf.open(QBuffer::WriteOnly);
342 image.save(&buf, mimeType.mid(mimeType.indexOf(QLatin1Char('/')) + 1).toLatin1().toUpper());
349 #endif // QT_NO_DRAGANDDROP && QT_NO_CLIPBOARD