/******************************************************************************** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).** All rights reserved.** Contact: Nokia Corporation (qt-info@nokia.com)**** This file is part of the QtGui module 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 Technology Preview License Agreement accompanying** this package.**** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.**** If you have questions regarding the use of this file, please contact** Nokia at qt-info@nokia.com.****************** $QT_END_LICENSE$******************************************************************************/#include "qplatformdefs.h"#include "qbitmap.h"#include "qdrag.h"#include "qpixmap.h"#include "qevent.h"#include "qfile.h"#include "qtextcodec.h"#include "qapplication.h"#include "qpoint.h"#include "qwidget.h"#include "qbuffer.h"#include "qimage.h"#include "qregexp.h"#include "qdir.h"#include "qdnd_p.h"#include "qimagereader.h"#include "qimagewriter.h"#include "qdebug.h"#include <ctype.h>#ifndef QT_NO_DRAGANDDROPQT_BEGIN_NAMESPACE// These pixmaps approximate the images in the Windows User Interface Guidelines.// XPMstatic const char * const move_xpm[] = {"11 20 3 1",". c None",#if defined(Q_WS_WIN)"a c #000000","X c #FFFFFF", // Windows cursor is traditionally white#else"a c #FFFFFF","X c #000000", // X11 cursor is traditionally black#endif"aa.........","aXa........","aXXa.......","aXXXa......","aXXXXa.....","aXXXXXa....","aXXXXXXa...","aXXXXXXXa..","aXXXXXXXXa.","aXXXXXXXXXa","aXXXXXXaaaa","aXXXaXXa...","aXXaaXXa...","aXa..aXXa..","aa...aXXa..","a.....aXXa.","......aXXa.",".......aXXa",".......aXXa","........aa."};#ifdef Q_WS_WIN/* XPM */static const char * const ignore_xpm[] = {"24 30 3 1",". c None","a c #000000","X c #FFFFFF","aa......................","aXa.....................","aXXa....................","aXXXa...................","aXXXXa..................","aXXXXXa.................","aXXXXXXa................","aXXXXXXXa...............","aXXXXXXXXa..............","aXXXXXXXXXa.............","aXXXXXXaaaa.............","aXXXaXXa................","aXXaaXXa................","aXa..aXXa...............","aa...aXXa...............","a.....aXXa..............","......aXXa.....XXXX.....",".......aXXa..XXaaaaXX...",".......aXXa.XaaaaaaaaX..","........aa.XaaaXXXXaaaX.","...........XaaaaX..XaaX.","..........XaaXaaaX..XaaX","..........XaaXXaaaX.XaaX","..........XaaX.XaaaXXaaX","..........XaaX..XaaaXaaX","...........XaaX..XaaaaX.","...........XaaaXXXXaaaX.","............XaaaaaaaaX..",".............XXaaaaXX...","...............XXXX....."};#endif/* XPM */static const char * const copy_xpm[] = {"24 30 3 1",". c None","a c #000000","X c #FFFFFF",#if defined(Q_WS_WIN) // Windows cursor is traditionally white"aa......................","aXa.....................","aXXa....................","aXXXa...................","aXXXXa..................","aXXXXXa.................","aXXXXXXa................","aXXXXXXXa...............","aXXXXXXXXa..............","aXXXXXXXXXa.............","aXXXXXXaaaa.............","aXXXaXXa................","aXXaaXXa................","aXa..aXXa...............","aa...aXXa...............","a.....aXXa..............","......aXXa..............",".......aXXa.............",".......aXXa.............","........aa...aaaaaaaaaaa",#else"XX......................","XaX.....................","XaaX....................","XaaaX...................","XaaaaX..................","XaaaaaX.................","XaaaaaaX................","XaaaaaaaX...............","XaaaaaaaaX..............","XaaaaaaaaaX.............","XaaaaaaXXXX.............","XaaaXaaX................","XaaXXaaX................","XaX..XaaX...............","XX...XaaX...............","X.....XaaX..............","......XaaX..............",".......XaaX.............",".......XaaX.............","........XX...aaaaaaaaaaa",#endif".............aXXXXXXXXXa",".............aXXXXXXXXXa",".............aXXXXaXXXXa",".............aXXXXaXXXXa",".............aXXaaaaaXXa",".............aXXXXaXXXXa",".............aXXXXaXXXXa",".............aXXXXXXXXXa",".............aXXXXXXXXXa",".............aaaaaaaaaaa"};/* XPM */static const char * const link_xpm[] = {"24 30 3 1",". c None","a c #000000","X c #FFFFFF",#if defined(Q_WS_WIN) // Windows cursor is traditionally white"aa......................","aXa.....................","aXXa....................","aXXXa...................","aXXXXa..................","aXXXXXa.................","aXXXXXXa................","aXXXXXXXa...............","aXXXXXXXXa..............","aXXXXXXXXXa.............","aXXXXXXaaaa.............","aXXXaXXa................","aXXaaXXa................","aXa..aXXa...............","aa...aXXa...............","a.....aXXa..............","......aXXa..............",".......aXXa.............",".......aXXa.............","........aa...aaaaaaaaaaa",#else"XX......................","XaX.....................","XaaX....................","XaaaX...................","XaaaaX..................","XaaaaaX.................","XaaaaaaX................","XaaaaaaaX...............","XaaaaaaaaX..............","XaaaaaaaaaX.............","XaaaaaaXXXX.............","XaaaXaaX................","XaaXXaaX................","XaX..XaaX...............","XX...XaaX...............","X.....XaaX..............","......XaaX..............",".......XaaX.............",".......XaaX.............","........XX...aaaaaaaaaaa",#endif".............aXXXXXXXXXa",".............aXXXaaaaXXa",".............aXXXXaaaXXa",".............aXXXaaaaXXa",".............aXXaaaXaXXa",".............aXXaaXXXXXa",".............aXXaXXXXXXa",".............aXXXaXXXXXa",".............aXXXXXXXXXa",".............aaaaaaaaaaa"};#ifndef QT_NO_DRAGANDDROP//#define QDND_DEBUG#ifdef QDND_DEBUGQString dragActionsToString(Qt::DropActions actions){ QString str; if (actions == Qt::IgnoreAction) { if (!str.isEmpty()) str += " | "; str += "IgnoreAction"; } if (actions & Qt::LinkAction) { if (!str.isEmpty()) str += " | "; str += "LinkAction"; } if (actions & Qt::CopyAction) { if (!str.isEmpty()) str += " | "; str += "CopyAction"; } if (actions & Qt::MoveAction) { if (!str.isEmpty()) str += " | "; str += "MoveAction"; } if ((actions & Qt::TargetMoveAction) == Qt::TargetMoveAction ) { if (!str.isEmpty()) str += " | "; str += "TargetMoveAction"; } return str;}QString KeyboardModifiersToString(Qt::KeyboardModifiers moderfies){ QString str; if (moderfies & Qt::ControlModifier) { if (!str.isEmpty()) str += " | "; str += Qt::ControlModifier; } if (moderfies & Qt::AltModifier) { if (!str.isEmpty()) str += " | "; str += Qt::AltModifier; } if (moderfies & Qt::ShiftModifier) { if (!str.isEmpty()) str += " | "; str += Qt::ShiftModifier; } return str;}#endif// the universe's only drag managerQDragManager *QDragManager::instance = 0;QDragManager::QDragManager() : QObject(qApp){ Q_ASSERT(!instance);#ifdef Q_WS_WIN n_cursor = 4;#else n_cursor = 3;#endif#ifdef Q_WS_QWS currentActionForOverrideCursor = Qt::IgnoreAction;#endif pm_cursor = new QPixmap[n_cursor]; pm_cursor[0] = QPixmap((const char **)move_xpm); pm_cursor[1] = QPixmap((const char **)copy_xpm); pm_cursor[2] = QPixmap((const char **)link_xpm);#ifdef Q_WS_WIN pm_cursor[3] = QPixmap((const char **)ignore_xpm);#endif object = 0; beingCancelled = false; restoreCursor = false; willDrop = false; eventLoop = 0; dropData = new QDropData(); currentDropTarget = 0;#ifdef Q_WS_X11 xdndMimeTransferedPixmapIndex = 0;#endif}QDragManager::~QDragManager(){#ifndef QT_NO_CURSOR if (restoreCursor) QApplication::restoreOverrideCursor();#endif instance = 0; delete [] pm_cursor; delete dropData;}QDragManager *QDragManager::self(){ if (!instance && !QApplication::closingDown()) instance = new QDragManager; return instance;}QPixmap QDragManager::dragCursor(Qt::DropAction action) const{ QDragPrivate * d = dragPrivate(); if (d && d->customCursors.contains(action)) return d->customCursors[action]; else if (action == Qt::MoveAction) return pm_cursor[0]; else if (action == Qt::CopyAction) return pm_cursor[1]; else if (action == Qt::LinkAction) return pm_cursor[2];#ifdef Q_WS_WIN else if (action == Qt::IgnoreAction) return pm_cursor[3];#endif return QPixmap();}bool QDragManager::hasCustomDragCursors() const{ QDragPrivate * d = dragPrivate(); return d && !d->customCursors.isEmpty();}Qt::DropAction QDragManager::defaultAction(Qt::DropActions possibleActions, Qt::KeyboardModifiers modifiers) const{#ifdef QDND_DEBUG qDebug("QDragManager::defaultAction(Qt::DropActions possibleActions)"); qDebug("keyboard modifiers : %s", KeyboardModifiersToString(modifiers).latin1());#endif QDragPrivate *d = dragPrivate(); Qt::DropAction defaultAction = d ? d->defaultDropAction : Qt::IgnoreAction; if (defaultAction == Qt::IgnoreAction) { //This means that the drag was initiated by QDrag::start and we need to //preserve the old behavior#ifdef Q_WS_MAC defaultAction = Qt::MoveAction;#else defaultAction = Qt::CopyAction;#endif }#ifdef Q_WS_MAC if (modifiers & Qt::ControlModifier && modifiers & Qt::AltModifier) defaultAction = Qt::LinkAction; else if (modifiers & Qt::AltModifier) defaultAction = Qt::CopyAction; else if (modifiers & Qt::ControlModifier) defaultAction = Qt::MoveAction;#else if (modifiers & Qt::ControlModifier && modifiers & Qt::ShiftModifier) defaultAction = Qt::LinkAction; else if (modifiers & Qt::ControlModifier) defaultAction = Qt::CopyAction; else if (modifiers & Qt::ShiftModifier) defaultAction = Qt::MoveAction; else if (modifiers & Qt::AltModifier) defaultAction = Qt::LinkAction;#endif // if the object is set take the list of possibles from it if (object) possibleActions = object->d_func()->possible_actions;#ifdef QDND_DEBUG qDebug("possible actions : %s", dragActionsToString(possibleActions).latin1());#endif // Check if the action determined is allowed if (!(possibleActions & defaultAction)) { if (possibleActions & Qt::CopyAction) defaultAction = Qt::CopyAction; else if (possibleActions & Qt::MoveAction) defaultAction = Qt::MoveAction; else if (possibleActions & Qt::LinkAction) defaultAction = Qt::LinkAction; else defaultAction = Qt::IgnoreAction; }#ifdef QDND_DEBUG qDebug("default action : %s", dragActionsToString(defaultAction).latin1());#endif return defaultAction;}void QDragManager::setCurrentTarget(QWidget *target, bool dropped){ if (currentDropTarget == target) return; currentDropTarget = target; if (!dropped && object) { object->d_func()->target = target; emit object->targetChanged(target); }}QWidget *QDragManager::currentTarget(){ return currentDropTarget;}#endifQDropData::QDropData() : QInternalMimeData(){}QDropData::~QDropData(){}#endif // QT_NO_DRAGANDDROP#if !(defined(QT_NO_DRAGANDDROP) && defined(QT_NO_CLIPBOARD))static QStringList imageReadMimeFormats(){ QStringList formats; QList<QByteArray> imageFormats = QImageReader::supportedImageFormats(); for (int i = 0; i < imageFormats.size(); ++i) { QString format = QLatin1String("image/"); format += QString::fromLatin1(imageFormats.at(i).toLower()); formats.append(format); } //put png at the front because it is best int pngIndex = formats.indexOf(QLatin1String("image/png")); if (pngIndex != -1 && pngIndex != 0) formats.move(pngIndex, 0); return formats;}static QStringList imageWriteMimeFormats(){ QStringList formats; QList<QByteArray> imageFormats = QImageWriter::supportedImageFormats(); for (int i = 0; i < imageFormats.size(); ++i) { QString format = QLatin1String("image/"); format += QString::fromLatin1(imageFormats.at(i).toLower()); formats.append(format); } //put png at the front because it is best int pngIndex = formats.indexOf(QLatin1String("image/png")); if (pngIndex != -1 && pngIndex != 0) formats.move(pngIndex, 0); return formats;}QInternalMimeData::QInternalMimeData() : QMimeData(){}QInternalMimeData::~QInternalMimeData(){}bool QInternalMimeData::hasFormat(const QString &mimeType) const{ bool foundFormat = hasFormat_sys(mimeType); if (!foundFormat && mimeType == QLatin1String("application/x-qt-image")) { QStringList imageFormats = imageReadMimeFormats(); for (int i = 0; i < imageFormats.size(); ++i) { if ((foundFormat = hasFormat_sys(imageFormats.at(i)))) break; } } return foundFormat;}QStringList QInternalMimeData::formats() const{ QStringList realFormats = formats_sys(); if (!realFormats.contains(QLatin1String("application/x-qt-image"))) { QStringList imageFormats = imageReadMimeFormats(); for (int i = 0; i < imageFormats.size(); ++i) { if (realFormats.contains(imageFormats.at(i))) { realFormats += QLatin1String("application/x-qt-image"); break; } } } return realFormats;}QVariant QInternalMimeData::retrieveData(const QString &mimeType, QVariant::Type type) const{ QVariant data = retrieveData_sys(mimeType, type); if (mimeType == QLatin1String("application/x-qt-image")) { if (data.isNull() || (data.type() == QVariant::ByteArray && data.toByteArray().isEmpty())) { // try to find an image QStringList imageFormats = imageReadMimeFormats(); for (int i = 0; i < imageFormats.size(); ++i) { data = retrieveData_sys(imageFormats.at(i), type); if (data.isNull() || (data.type() == QVariant::ByteArray && data.toByteArray().isEmpty())) continue; break; } } // we wanted some image type, but all we got was a byte array. Convert it to an image. if (data.type() == QVariant::ByteArray && (type == QVariant::Image || type == QVariant::Pixmap || type == QVariant::Bitmap)) data = QImage::fromData(data.toByteArray()); } else if (mimeType == QLatin1String("application/x-color") && data.type() == QVariant::ByteArray) { QColor c; QByteArray ba = data.toByteArray(); if (ba.size() == 8) { ushort * colBuf = (ushort *)ba.data(); c.setRgbF(qreal(colBuf[0]) / qreal(0xFFFF), qreal(colBuf[1]) / qreal(0xFFFF), qreal(colBuf[2]) / qreal(0xFFFF), qreal(colBuf[3]) / qreal(0xFFFF)); data = c; } else { qWarning("Qt: Invalid color format"); } } else if (data.type() != type && data.type() == QVariant::ByteArray) { // try to use mime data's internal conversion stuf. QInternalMimeData *that = const_cast<QInternalMimeData *>(this); that->setData(mimeType, data.toByteArray()); data = QMimeData::retrieveData(mimeType, type); that->clear(); } return data;}bool QInternalMimeData::canReadData(const QString &mimeType){ return imageReadMimeFormats().contains(mimeType);}// helper functions for rendering mimedata to the system, this is needed because QMimeData is in core.QStringList QInternalMimeData::formatsHelper(const QMimeData *data){ QStringList realFormats = data->formats(); if (realFormats.contains(QLatin1String("application/x-qt-image"))) { // add all supported image formats QStringList imageFormats = imageWriteMimeFormats(); for (int i = 0; i < imageFormats.size(); ++i) { if (!realFormats.contains(imageFormats.at(i))) realFormats.append(imageFormats.at(i)); } } return realFormats;}bool QInternalMimeData::hasFormatHelper(const QString &mimeType, const QMimeData *data){ bool foundFormat = data->hasFormat(mimeType); if (!foundFormat) { if (mimeType == QLatin1String("application/x-qt-image")) { // check all supported image formats QStringList imageFormats = imageWriteMimeFormats(); for (int i = 0; i < imageFormats.size(); ++i) { if ((foundFormat = data->hasFormat(imageFormats.at(i)))) break; } } else if (mimeType.startsWith(QLatin1String("image/"))) { return data->hasImage() && imageWriteMimeFormats().contains(mimeType); } } return foundFormat;}QByteArray QInternalMimeData::renderDataHelper(const QString &mimeType, const QMimeData *data){ QByteArray ba; if (mimeType == QLatin1String("application/x-color")) { /* QMimeData can only provide colors as QColor or the name of a color as a QByteArray or a QString. So we need to do the conversion to application/x-color here. The application/x-color format is : type: application/x-color format: 16 data[0]: red data[1]: green data[2]: blue data[3]: opacity */ ba.resize(8); ushort * colBuf = (ushort *)ba.data(); QColor c = qvariant_cast<QColor>(data->colorData()); colBuf[0] = ushort(c.redF() * 0xFFFF); colBuf[1] = ushort(c.greenF() * 0xFFFF); colBuf[2] = ushort(c.blueF() * 0xFFFF); colBuf[3] = ushort(c.alphaF() * 0xFFFF); } else { ba = data->data(mimeType); if (ba.isEmpty()) { if (mimeType == QLatin1String("application/x-qt-image") && data->hasImage()) { QImage image = qvariant_cast<QImage>(data->imageData()); QBuffer buf(&ba); buf.open(QBuffer::WriteOnly); // would there not be PNG ?? image.save(&buf, "PNG"); } else if (mimeType.startsWith(QLatin1String("image/")) && data->hasImage()) { QImage image = qvariant_cast<QImage>(data->imageData()); QBuffer buf(&ba); buf.open(QBuffer::WriteOnly); image.save(&buf, mimeType.mid(mimeType.indexOf(QLatin1Char('/')) + 1).toLatin1().toUpper()); } } } return ba;}#endif // QT_NO_DRAGANDDROP && QT_NO_CLIPBOARDQT_END_NAMESPACE