path: root/src/gui/kernel/qplatformdrag.cpp

// Copyright (C) 2016 The Qt Company Ltd.// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only#include"qplatformdrag.h"#include <QtGui/private/qdnd_p.h>#include <QtGui/QKeyEvent>#include <QtGui/QGuiApplication>#include <QtCore/QEventLoop> QT_BEGIN_NAMESPACE #ifdef QDND_DEBUG# include <QtCore/QDebug>#endifQPlatformDropQtResponse::QPlatformDropQtResponse(bool accepted,Qt::DropAction acceptedAction):m_accepted(accepted),m_accepted_action(acceptedAction){}boolQPlatformDropQtResponse::isAccepted()const{return m_accepted;}Qt::DropAction QPlatformDropQtResponse::acceptedAction()const{return m_accepted_action;}QPlatformDragQtResponse::QPlatformDragQtResponse(bool accepted,Qt::DropAction acceptedAction, QRect answerRect):QPlatformDropQtResponse(accepted,acceptedAction),m_answer_rect(answerRect){} QRect QPlatformDragQtResponse::answerRect()const{return m_answer_rect;}class QPlatformDragPrivate {public:QPlatformDragPrivate() :cursor_drop_action(Qt::IgnoreAction) {}Qt::DropAction cursor_drop_action;};/*! \class QPlatformDrag \since 5.0 \internal \preliminary \ingroup qpa \brief The QPlatformDrag class provides an abstraction for drag. */QPlatformDrag::QPlatformDrag() :d_ptr(new QPlatformDragPrivate){}QPlatformDrag::~QPlatformDrag(){delete d_ptr;} QDrag *QPlatformDrag::currentDrag()const{returnQDragManager::self()->object();}Qt::DropAction QPlatformDrag::defaultAction(Qt::DropActions possibleActions,Qt::KeyboardModifiers modifiers)const{#ifdef QDND_DEBUGqDebug() <<"QDragManager::defaultAction(Qt::DropActions possibleActions)\nkeyboard modifiers : "<< modifiers;#endifQt::DropAction default_action =Qt::IgnoreAction;if(currentDrag()) { default_action =currentDrag()->defaultAction();}if(default_action ==Qt::IgnoreAction) {//This means that the drag was initiated by QDrag::start and we need to//preserve the old behavior default_action =Qt::CopyAction;}if(modifiers &Qt::ControlModifier && modifiers &Qt::ShiftModifier) default_action =Qt::LinkAction;else if(modifiers &Qt::ControlModifier) default_action =Qt::CopyAction;else if(modifiers &Qt::ShiftModifier) default_action =Qt::MoveAction;else if(modifiers &Qt::AltModifier) default_action =Qt::LinkAction;#ifdef QDND_DEBUGqDebug() <<"possible actions : "<< possibleActions;#endif// Check if the action determined is allowedif(!(possibleActions & default_action)) {if(possibleActions &Qt::CopyAction) default_action =Qt::CopyAction;else if(possibleActions &Qt::MoveAction) default_action =Qt::MoveAction;else if(possibleActions &Qt::LinkAction) default_action =Qt::LinkAction;else default_action =Qt::IgnoreAction;}#ifdef QDND_DEBUGqDebug() <<"default action : "<< default_action;#endifreturn default_action;}/*! \brief Cancels the currently active drag (only for drags of the current application initiated by QPlatformDrag::drag()). The default implementation does nothing. \since 5.7 */voidQPlatformDrag::cancelDrag(){Q_UNIMPLEMENTED();}/*! \brief Called to notify QDrag about changes of the current action. */voidQPlatformDrag::updateAction(Qt::DropAction action){Q_D(QPlatformDrag);if(d->cursor_drop_action != action) { d->cursor_drop_action = action; emit currentDrag()->actionChanged(action);}}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",};Q_GLOBAL_STATIC_WITH_ARGS(QPixmap,qt_drag_default_pixmap,(default_pm)) QPixmap QPlatformDrag::defaultPixmap(){return*qt_drag_default_pixmap();}/*! \since 5.4 \brief Returns bool indicating whether QPlatformDrag takes ownership and therefore responsibility of deleting the QDrag object passed in from QPlatformDrag::drag. This can be useful on platforms where QDrag object has to be kept around. */boolQPlatformDrag::ownsDragObject()const{return false;} QT_END_NAMESPACE