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Diffstat (limited to 'src/gui/to_be_moved/qdrag.cpp')
| -rw-r--r-- | src/gui/to_be_moved/qdrag.cpp | 359 |
1 files changed, 0 insertions, 359 deletions
diff --git a/src/gui/to_be_moved/qdrag.cpp b/src/gui/to_be_moved/qdrag.cpp deleted file mode 100644 index d8d14cb45c..0000000000 --- a/src/gui/to_be_moved/qdrag.cpp +++ /dev/null @@ -1,359 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2011 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 <qwidget.h> -#include <qdrag.h> -#include <qpixmap.h> -#include <qpoint.h> -#include "qdnd_p.h" - -#ifndef QT_NO_DRAGANDDROP - -QT_BEGIN_NAMESPACE - -/*! - \class QDrag - \brief The QDrag class provides support for MIME-based drag and drop data - transfer. - - Drag and drop is an intuitive way for users to copy or move data around in an - application, and is used in many desktop environments as a mechanism for copying - data between applications. Drag and drop support in Qt is centered around the - QDrag class that handles most of the details of a drag and drop operation. - - The data to be transferred by the drag and drop operation is contained in a - QMimeData object. This is specified with the setMimeData() function in the - following way: - - \snippet doc/src/snippets/dragging/mainwindow.cpp 1 - - Note that setMimeData() assigns ownership of the QMimeData object to the - QDrag object. The QDrag must be constructed on the heap with a parent QWidget - to ensure that Qt can clean up after the drag and drop operation has been - completed. - - A pixmap can be used to represent the data while the drag is in - progress, and will move with the cursor to the drop target. This - pixmap typically shows an icon that represents the MIME type of - the data being transferred, but any pixmap can be set with - setPixmap(). The cursor's hot spot can be given a position - relative to the top-left corner of the pixmap with the - setHotSpot() function. The following code positions the pixmap so - that the cursor's hot spot points to the center of its bottom - edge: - - \snippet doc/src/snippets/separations/finalwidget.cpp 2 - - \note On X11, the pixmap may not be able to keep up with the mouse - movements if the hot spot causes the pixmap to be displayed - directly under the cursor. - - The source and target widgets can be found with source() and target(). - These functions are often used to determine whether drag and drop operations - started and finished at the same widget, so that special behavior can be - implemented. - - QDrag only deals with the drag and drop operation itself. It is up to the - developer to decide when a drag operation begins, and how a QDrag object should - be constructed and used. For a given widget, it is often necessary to - reimplement \l{QWidget::mousePressEvent()}{mousePressEvent()} to determine - whether the user has pressed a mouse button, and reimplement - \l{QWidget::mouseMoveEvent()}{mouseMoveEvent()} to check whether a QDrag is - required. - - \sa {Drag and Drop}, QClipboard, QMimeData, QWindowsMime, QMacPasteboardMime, - {Draggable Icons Example}, {Draggable Text Example}, {Drop Site Example}, - {Fridge Magnets Example} -*/ - -/*! - Constructs a new drag object for the widget specified by \a dragSource. -*/ -QDrag::QDrag(QWidget *dragSource) - : QObject(*new QDragPrivate, dragSource) -{ - Q_D(QDrag); - d->source = dragSource; - d->target = 0; - d->data = 0; - d->hotspot = QPoint(-10, -10); - d->possible_actions = Qt::CopyAction; - d->executed_action = Qt::IgnoreAction; - d->defaultDropAction = Qt::IgnoreAction; -} - -/*! - Destroys the drag object. -*/ -QDrag::~QDrag() -{ - Q_D(QDrag); - delete d->data; - QDragManager *manager = QDragManager::self(); - if (manager && manager->object == this) - manager->cancel(false); -} - -/*! - Sets the data to be sent to the given MIME \a data. Ownership of the data is - transferred to the QDrag object. -*/ -void QDrag::setMimeData(QMimeData *data) -{ - Q_D(QDrag); - if (d->data == data) - return; - if (d->data != 0) - delete d->data; - d->data = data; -} - -/*! - Returns the MIME data that is encapsulated by the drag object. -*/ -QMimeData *QDrag::mimeData() const -{ - Q_D(const QDrag); - return d->data; -} - -/*! - Sets \a pixmap as the pixmap used to represent the data in a drag - and drop operation. You can only set a pixmap before the drag is - started. -*/ -void QDrag::setPixmap(const QPixmap &pixmap) -{ - Q_D(QDrag); - d->pixmap = pixmap; -} - -/*! - Returns the pixmap used to represent the data in a drag and drop operation. -*/ -QPixmap QDrag::pixmap() const -{ - Q_D(const QDrag); - return d->pixmap; -} - -/*! - Sets the position of the hot spot relative to the top-left corner of the - pixmap used to the point specified by \a hotspot. - - \bold{Note:} on X11, the pixmap may not be able to keep up with the mouse - movements if the hot spot causes the pixmap to be displayed - directly under the cursor. -*/ -void QDrag::setHotSpot(const QPoint& hotspot) -{ - Q_D(QDrag); - d->hotspot = hotspot; -} - -/*! - Returns the position of the hot spot relative to the top-left corner of the - cursor. -*/ -QPoint QDrag::hotSpot() const -{ - Q_D(const QDrag); - return d->hotspot; -} - -/*! - Returns the source of the drag object. This is the widget where the drag - and drop operation originated. -*/ -QWidget *QDrag::source() const -{ - Q_D(const QDrag); - return d->source; -} - -/*! - Returns the target of the drag and drop operation. This is the widget where - the drag object was dropped. -*/ -QWidget *QDrag::target() const -{ - Q_D(const QDrag); - return d->target; -} - -/*! - \since 4.3 - - Starts the drag and drop operation and returns a value indicating the requested - drop action when it is completed. The drop actions that the user can choose - from are specified in \a supportedActions. The default proposed action will be selected - among the allowed actions in the following order: Move, Copy and Link. - - \bold{Note:} On Linux and Mac OS X, the drag and drop operation - can take some time, but this function does not block the event - loop. Other events are still delivered to the application while - the operation is performed. On Windows, the Qt event loop is - blocked while during the operation. -*/ - -Qt::DropAction QDrag::exec(Qt::DropActions supportedActions) -{ - return exec(supportedActions, Qt::IgnoreAction); -} - -/*! - \since 4.3 - - Starts the drag and drop operation and returns a value indicating the requested - drop action when it is completed. The drop actions that the user can choose - from are specified in \a supportedActions. - - The \a defaultDropAction determines which action will be proposed when the user performs a - drag without using modifier keys. - - \bold{Note:} On Linux and Mac OS X, the drag and drop operation - can take some time, but this function does not block the event - loop. Other events are still delivered to the application while - the operation is performed. On Windows, the Qt event loop is - blocked during the operation. However, QDrag::exec() on - Windows causes processEvents() to be called frequently to keep the GUI responsive. - If any loops or operations are called while a drag operation is active, it will block the drag operation. -*/ - -Qt::DropAction QDrag::exec(Qt::DropActions supportedActions, Qt::DropAction defaultDropAction) -{ - Q_D(QDrag); - if (!d->data) { - qWarning("QDrag: No mimedata set before starting the drag"); - return d->executed_action; - } - QDragManager *manager = QDragManager::self(); - d->defaultDropAction = Qt::IgnoreAction; - d->possible_actions = supportedActions; - - if (manager) { - if (defaultDropAction == Qt::IgnoreAction) { - if (supportedActions & Qt::MoveAction) { - d->defaultDropAction = Qt::MoveAction; - } else if (supportedActions & Qt::CopyAction) { - d->defaultDropAction = Qt::CopyAction; - } else if (supportedActions & Qt::LinkAction) { - d->defaultDropAction = Qt::LinkAction; - } - } else { - d->defaultDropAction = defaultDropAction; - } - d->executed_action = manager->drag(this); - } - - return d->executed_action; -} - -/*! - \obsolete - - \bold{Note:} It is recommended to use exec() instead of this function. - - Starts the drag and drop operation and returns a value indicating the requested - drop action when it is completed. The drop actions that the user can choose - from are specified in \a request. Qt::CopyAction is always allowed. - - \bold{Note:} Although the drag and drop operation can take some time, this function - does not block the event loop. Other events are still delivered to the application - while the operation is performed. - - \sa exec() -*/ -Qt::DropAction QDrag::start(Qt::DropActions request) -{ - Q_D(QDrag); - if (!d->data) { - qWarning("QDrag: No mimedata set before starting the drag"); - return d->executed_action; - } - QDragManager *manager = QDragManager::self(); - d->defaultDropAction = Qt::IgnoreAction; - d->possible_actions = request | Qt::CopyAction; - if (manager) - d->executed_action = manager->drag(this); - return d->executed_action; -} - -/*! - Sets the drag \a cursor for the \a action. This allows you - to override the default native cursors. To revert to using the - native cursor for \a action pass in a null QPixmap as \a cursor. - - The \a action can only be CopyAction, MoveAction or LinkAction. - All other values of DropAction are ignored. -*/ -void QDrag::setDragCursor(const QPixmap &cursor, Qt::DropAction action) -{ - Q_D(QDrag); - if (action != Qt::CopyAction && action != Qt::MoveAction && action != Qt::LinkAction) - return; - if (cursor.isNull()) - d->customCursors.remove(action); - else - d->customCursors[action] = cursor; -} - -/*! - \fn void QDrag::actionChanged(Qt::DropAction action) - - This signal is emitted when the \a action associated with the - drag changes. - - \sa targetChanged() -*/ - -/*! - \fn void QDrag::targetChanged(QWidget *newTarget) - - This signal is emitted when the target of the drag and drop - operation changes, with \a newTarget the new target. - - \sa target(), actionChanged() -*/ - -QT_END_NAMESPACE - -#endif // QT_NO_DRAGANDDROP |