--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/kernel/qdnd_qws.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,422 @@
+/****************************************************************************
+**
+** 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 "qapplication.h"
+
+#ifndef QT_NO_DRAGANDDROP
+
+#include "qwidget.h"
+#include "qdatetime.h"
+#include "qbitmap.h"
+#include "qcursor.h"
+#include "qevent.h"
+#include "qpainter.h"
+#include "qdnd_p.h"
+
+QT_BEGIN_NAMESPACE
+
+QT_USE_NAMESPACE
+
+static QPixmap *defaultPm = 0;
+static const int default_pm_hotx = -2;
+static const int default_pm_hoty = -16;
+static const char *const default_pm[] = {
+"13 9 3 1",
+". c None",
+" c #000000",
+"X c #FFFFFF",
+"X X X X X X X",
+" X X X X X X ",
+"X ......... X",
+" X.........X ",
+"X ......... X",
+" X.........X ",
+"X ......... X",
+" X X X X X X ",
+"X X X X X X X",
+};
+
+// Shift/Ctrl handling, and final drop status
+static Qt::DropAction global_accepted_action = Qt::CopyAction;
+static Qt::DropActions possible_actions = Qt::IgnoreAction;
+
+
+// static variables in place of a proper cross-process solution
+static QDrag *drag_object;
+static bool qt_qws_dnd_dragging = false;
+
+
+static Qt::KeyboardModifiers oldstate;
+
+class QShapedPixmapWidget : public QWidget {
+ QPixmap pixmap;
+public:
+ QShapedPixmapWidget() :
+ QWidget(0, Qt::Tool | Qt::FramelessWindowHint | Qt::X11BypassWindowManagerHint)
+ {
+ // ### Temporary workaround for 4.2-rc1!!! To prevent flickering when
+ // using drag'n drop in a client application. (task 126956)
+ // setAttribute() should be done unconditionally!
+ if (QApplication::type() == QApplication::GuiServer)
+ setAttribute(Qt::WA_TransparentForMouseEvents);
+ }
+
+ void setPixmap(QPixmap pm)
+ {
+ pixmap = pm;
+ if (!pixmap.mask().isNull()) {
+ setMask(pixmap.mask());
+ } else {
+ clearMask();
+ }
+ resize(pm.width(),pm.height());
+ }
+
+ void paintEvent(QPaintEvent*)
+ {
+ QPainter p(this);
+ p.drawPixmap(0,0,pixmap);
+ }
+};
+
+
+static QShapedPixmapWidget *qt_qws_dnd_deco = 0;
+
+
+void QDragManager::updatePixmap()
+{
+ if (qt_qws_dnd_deco) {
+ QPixmap pm;
+ QPoint pm_hot(default_pm_hotx,default_pm_hoty);
+ if (drag_object) {
+ pm = drag_object->pixmap();
+ if (!pm.isNull())
+ pm_hot = drag_object->hotSpot();
+ }
+ if (pm.isNull()) {
+ if (!defaultPm)
+ defaultPm = new QPixmap(default_pm);
+ pm = *defaultPm;
+ }
+ qt_qws_dnd_deco->setPixmap(pm);
+ qt_qws_dnd_deco->move(QCursor::pos()-pm_hot);
+ if (willDrop) {
+ qt_qws_dnd_deco->show();
+ } else {
+ qt_qws_dnd_deco->hide();
+ }
+ }
+}
+
+void QDragManager::timerEvent(QTimerEvent *) { }
+
+void QDragManager::move(const QPoint &) { }
+
+void QDragManager::updateCursor()
+{
+#ifndef QT_NO_CURSOR
+ if (willDrop) {
+ if (qt_qws_dnd_deco)
+ qt_qws_dnd_deco->show();
+ if (currentActionForOverrideCursor != global_accepted_action) {
+ QApplication::changeOverrideCursor(QCursor(dragCursor(global_accepted_action), 0, 0));
+ currentActionForOverrideCursor = global_accepted_action;
+ }
+ } else {
+ QCursor *overrideCursor = QApplication::overrideCursor();
+ if (!overrideCursor || overrideCursor->shape() != Qt::ForbiddenCursor) {
+ QApplication::changeOverrideCursor(QCursor(Qt::ForbiddenCursor));
+ currentActionForOverrideCursor = Qt::IgnoreAction;
+ }
+ if (qt_qws_dnd_deco)
+ qt_qws_dnd_deco->hide();
+ }
+#endif
+}
+
+
+bool QDragManager::eventFilter(QObject *o, QEvent *e)
+{
+ if (beingCancelled) {
+ if (e->type() == QEvent::KeyRelease && static_cast<QKeyEvent*>(e)->key() == Qt::Key_Escape) {
+ qApp->removeEventFilter(this);
+ Q_ASSERT(object == 0);
+ beingCancelled = false;
+ eventLoop->exit();
+ return true; // block the key release
+ }
+ return false;
+ }
+
+
+
+ if (!o->isWidgetType())
+ return false;
+
+ switch(e->type()) {
+
+ case QEvent::KeyPress:
+ case QEvent::KeyRelease:
+ {
+ QKeyEvent *ke = ((QKeyEvent*)e);
+ if (ke->key() == Qt::Key_Escape && e->type() == QEvent::KeyPress) {
+ cancel();
+ qApp->removeEventFilter(this);
+ beingCancelled = false;
+ eventLoop->exit();
+ } else {
+ updateCursor();
+ }
+ return true; // Eat all key events
+ }
+
+ case QEvent::MouseButtonPress:
+ case QEvent::MouseMove:
+ {
+ if (!object) { //#### this should not happen
+ qWarning("QDragManager::eventFilter: No object");
+ return true;
+ }
+
+ QDragManager *manager = QDragManager::self();
+ QMimeData *dropData = manager->object ? manager->dragPrivate()->data : manager->dropData;
+ if (manager->object)
+ possible_actions = manager->dragPrivate()->possible_actions;
+ else
+ possible_actions = Qt::IgnoreAction;
+
+ QMouseEvent *me = (QMouseEvent *)e;
+ if (me->buttons()) {
+ Qt::DropAction prevAction = global_accepted_action;
+ QWidget *cw = QApplication::widgetAt(me->globalPos());
+
+ // Fix for when we move mouse on to the deco widget
+ if (qt_qws_dnd_deco && cw == qt_qws_dnd_deco)
+ cw = object->target();
+
+ while (cw && !cw->acceptDrops() && !cw->isWindow())
+ cw = cw->parentWidget();
+
+ if (object->target() != cw) {
+ if (object->target()) {
+ QDragLeaveEvent dle;
+ QApplication::sendEvent(object->target(), &dle);
+ willDrop = false;
+ global_accepted_action = Qt::IgnoreAction;
+ updateCursor();
+ restoreCursor = true;
+ object->d_func()->target = 0;
+ }
+ if (cw && cw->acceptDrops()) {
+ object->d_func()->target = cw;
+ QDragEnterEvent dee(cw->mapFromGlobal(me->globalPos()), possible_actions, dropData,
+ me->buttons(), me->modifiers());
+ QApplication::sendEvent(object->target(), &dee);
+ willDrop = dee.isAccepted() && dee.dropAction() != Qt::IgnoreAction;
+ global_accepted_action = willDrop ? dee.dropAction() : Qt::IgnoreAction;
+ updateCursor();
+ restoreCursor = true;
+ }
+ } else if (cw) {
+ QDragMoveEvent dme(cw->mapFromGlobal(me->globalPos()), possible_actions, dropData,
+ me->buttons(), me->modifiers());
+ if (global_accepted_action != Qt::IgnoreAction) {
+ dme.setDropAction(global_accepted_action);
+ dme.accept();
+ }
+ QApplication::sendEvent(cw, &dme);
+ willDrop = dme.isAccepted();
+ global_accepted_action = willDrop ? dme.dropAction() : Qt::IgnoreAction;
+ updatePixmap();
+ updateCursor();
+ }
+ if (global_accepted_action != prevAction)
+ emitActionChanged(global_accepted_action);
+ }
+ return true; // Eat all mouse events
+ }
+
+ case QEvent::MouseButtonRelease:
+ {
+ qApp->removeEventFilter(this);
+ if (restoreCursor) {
+ willDrop = false;
+#ifndef QT_NO_CURSOR
+ QApplication::restoreOverrideCursor();
+#endif
+ restoreCursor = false;
+ }
+ if (object && object->target()) {
+ QMouseEvent *me = (QMouseEvent *)e;
+
+ QDragManager *manager = QDragManager::self();
+ QMimeData *dropData = manager->object ? manager->dragPrivate()->data : manager->dropData;
+
+ QDropEvent de(object->target()->mapFromGlobal(me->globalPos()), possible_actions, dropData,
+ me->buttons(), me->modifiers());
+ QApplication::sendEvent(object->target(), &de);
+ if (de.isAccepted())
+ global_accepted_action = de.dropAction();
+ else
+ global_accepted_action = Qt::IgnoreAction;
+
+ if (object)
+ object->deleteLater();
+ drag_object = object = 0;
+ }
+ eventLoop->exit();
+ return true; // Eat all mouse events
+ }
+
+ default:
+ break;
+ }
+
+ return false;
+}
+
+Qt::DropAction QDragManager::drag(QDrag *o)
+{
+ if (object == o || !o || !o->source())
+ return Qt::IgnoreAction;
+
+ if (object) {
+ cancel();
+ qApp->removeEventFilter(this);
+ beingCancelled = false;
+ }
+
+ object = drag_object = o;
+ qt_qws_dnd_deco = new QShapedPixmapWidget();
+ oldstate = Qt::NoModifier; // #### Should use state that caused the drag
+// drag_mode = mode;
+
+ willDrop = false;
+ updatePixmap();
+ updateCursor();
+ restoreCursor = true;
+ object->d_func()->target = 0;
+ qApp->installEventFilter(this);
+
+ global_accepted_action = Qt::CopyAction;
+#ifndef QT_NO_CURSOR
+ qApp->setOverrideCursor(Qt::ArrowCursor);
+ restoreCursor = true;
+ updateCursor();
+#endif
+
+ qt_qws_dnd_dragging = true;
+
+ eventLoop = new QEventLoop;
+ (void) eventLoop->exec();
+ delete eventLoop;
+ eventLoop = 0;
+
+ delete qt_qws_dnd_deco;
+ qt_qws_dnd_deco = 0;
+ qt_qws_dnd_dragging = false;
+
+
+ return global_accepted_action;
+}
+
+
+void QDragManager::cancel(bool deleteSource)
+{
+// qDebug("QDragManager::cancel");
+ beingCancelled = true;
+
+ if (object->target()) {
+ QDragLeaveEvent dle;
+ QApplication::sendEvent(object->target(), &dle);
+ }
+
+#ifndef QT_NO_CURSOR
+ if (restoreCursor) {
+ QApplication::restoreOverrideCursor();
+ restoreCursor = false;
+ }
+#endif
+
+ if (drag_object) {
+ if (deleteSource)
+ object->deleteLater();
+ drag_object = object = 0;
+ }
+
+ delete qt_qws_dnd_deco;
+ qt_qws_dnd_deco = 0;
+
+ global_accepted_action = Qt::IgnoreAction;
+}
+
+
+void QDragManager::drop()
+{
+}
+
+QVariant QDropData::retrieveData_sys(const QString &mimetype, QVariant::Type type) const
+{
+ if (!drag_object)
+ return QVariant();
+ QByteArray data = drag_object->mimeData()->data(mimetype);
+ if (type == QVariant::String)
+ return QString::fromUtf8(data);
+ return data;
+}
+
+bool QDropData::hasFormat_sys(const QString &format) const
+{
+ return formats().contains(format);
+}
+
+QStringList QDropData::formats_sys() const
+{
+ if (drag_object)
+ return drag_object->mimeData()->formats();
+ return QStringList();
+}
+
+
+#endif // QT_NO_DRAGANDDROP
+
+
+QT_END_NAMESPACE